How to bend a pipe without a pipe bender for a canopy

How to bend a pipe at home without a pipe bender from different materials: methods

When installing water supply and heating systems, during their repair there is a need to bend pipes. A pipe bender is used to bend metal products of various sections. Very often, when performing installation work at the dacha or at home with your own hands, you do not have the necessary tools at hand, and it is not always possible to purchase workpieces with the required bending angle. Let's look at how to bend a pipe at home without a pipe bender.

Methods for bending pipes at home

There are many methods for bending rolled metal. The choice of method depends on the material of the part and its diameter. The most difficult thing to bend is thick-walled metal blanks. Let us dwell in more detail on the most effective methods for steel and aluminum structures.

Application of the hot method

A blowtorch, a hair dryer turned on at maximum heating temperature, or a gas burner are suitable for heating metal. Sand is used as a filler. It prevents rupture of the walls during bending, the appearance of dents and bulging of the metal. To prevent the filler from spilling out, it is recommended to install temporary plugs at the ends.

Important! It is necessary to monitor the glow temperature; overheating can cause the metal to melt. The method is suitable for pipes with a cross-section over 10 cm.

Let's look at how to bend a pipe at home without an aluminum pipe bender. A sheet of paper is brought to the heated surface. If it ignites, heating should be stopped. An indicator of sufficient heating on steel structures is redness to the state of scale. It should be remembered that the metal heats up along its entire length, so the work must be done with rubber gloves.

We use fillers - sand and water

The cavities are filled with water without impurities. Plugs are attached to the ends, then frozen in the freezer or in the cold. Bending is carried out after heating with a gas burner. The procedure cannot be used for products with galvanized coating, otherwise it will be damaged.

This option is suitable for products with a large cross-section or with a square configuration. If you need to bend it at a slight angle, it is better to use sand as a filler. After thorough heating over the entire surface, the part is bent by tapping with a mallet. Galvanized structures are bent without heating.

Important! When filling a cavity with loose filler, it must be compacted so that the internal space is filled without voids. When closing the plug, a reserve is left so that it is easier to remove at the end of the procedure.

Applying templates

If deflection is necessary in several planes or at different radii, a template is used for verification. It is made from wire. Self-tapping screws can be used as a drawing. They are used for curved bends. Self-tapping screws are screwed into a rigid base, giving the desired configuration.

Bending is performed gradually, applying the product to the template for verification. The check sometimes has to be performed multiple times. When heating the surface, the minimum permissible bending size should be taken into account. It is calculated taking into account the section of the part. The smallest bend size is 3 diameters. The length of the heated section depends on the bending radius:

It is recommended to mark the deflection area on the surface with chalk. When heating, areas should be monitored for the quality of heating. If the temperature is insufficient, folds occur during deflection. The optimal temperature for heating metal parts is the appearance of scale. If the surface is overheated, it is carefully cooled with water.

Rolls

Many builders are interested in how to bend a pipe at home without a pipe bender using improvised means. Parts with a diameter of up to 10 mm are bent using rollers without heating. The product is firmly fixed in a vice. When bending, the emphasis is placed on a vice, while simultaneously pressing with a roller. For workpieces with a cross-section of 40 mm , heating is required; bending them using rollers is labor-intensive.

Rolls are also used in a home-made lever pipe bender. The workpiece moves along two rollers located horizontally, and a bend is performed using a central roller. The device is suitable for arched deflection. The bend is uniform and has a large radius.

Springs

The method has proven itself well for parts with a square cross-section, but it is also suitable for pipes of other configurations. A spring of the same shape as the profile itself is required.

The spring mechanism can be made of solid steel wire. The diameter of the rod depends on the wall thickness. The spring is selected in accordance with the cross-section of the part; it can be moved in and out freely. Before bending, the metal is heated, then bent, held with pliers.

Important! You can adjust the deflection radius using a blank.

Simple ways to bend pipes

The bending method with heating is inappropriate for workpieces made of stainless steel, copper, metal-plastic and polypropylene.

Profile

Profile metal products – products with a square, oval or rectangular configuration. It is very difficult to bend them without violating the technical parameters. The best option is welding with preliminary cutting of the walls with a grinder in several places on the bend. First, cuts are made, the part is bent to the desired radius, then the seams are welded. Parts of small diameter can be soldered with a special soldering iron.

Stainless or steel

Stainless steel products cannot be bent by heating. To reduce the likelihood of deformation, various fillers are used: fine-grained sand, frozen water or calibrating plug. Rigid fillers help preserve the shape of the workpiece, elastic fillers allow less stretching of the outer wall. To obtain a uniform bend, limiters are installed both inside and outside the part.

Important! To avoid notches and defects from the calibration plug, use a lubricant: machine oil or soapy anti-corrosion emulsion.

Copper and aluminum

Aluminum and copper are quite soft. Bending can be done using cold or heated methods. Suitable fillers include sand, water, spring or rosin. The hot method is best suited for workpieces with a small diameter.

Metal-plastic

Metal-plastic blanks are bent without heating by hand, just apply some effort. Care must be taken to ensure that no kinks are formed. The permissible value is 15⁰ for every 2 cm.

The products are easily bent using wire, which is inserted into both cavities, filling the cavity evenly. Hot method is allowed. The workpiece is heated with a gas burner or a hair dryer, gradually bending it. The heating temperature is controlled with a paper sheet. Warming up should be continued until the sheet begins to smoke.

Polypropylene

It is recommended to bend polypropylene parts only if absolutely necessary. The surface is heated with a construction hairdryer to a temperature of 150⁰C, and bent by hand with gloves on without any improvised means. Using this method, you can bend workpieces with a radius equal to 8 part diameters.

Tips from experts on bending different pipes

Important! When bending, a thick wall should be located on the outside, a thinner wall should be located on the bend.

When choosing a bending method, you should pay attention to the material of the part, its diameter and the required bending radius. Not all materials allow the procedure to be performed by heating. It is recommended to practice on unnecessary leftovers first. It should be remembered that it is impossible to obtain a perfect bend using improvised means. For thick-walled products, it is better to take a pipe bender.

Source: https://prosto-instrumenty.ru/kak-sognut-trubu-v-domashnix-usloviyax-bez-trubogiba/

How to bend a profile pipe at home without a pipe bender?

Almost all summer residents and owners of private houses have to face the question of how to bend a profile pipe at home without a pipe bender.

Arches from profile pipes are used in the construction of greenhouses, gazebos, canopies and arched canopies. Purchasing special bending devices or making them yourself is not economically profitable.

They are needed for mass production, not individual production. Let's look at what methods exist for bending profile pipes to the required radius.

What is the problem with profile bending?

The essence of this process is that one side of the pipe is stretched, and the inner part is compressed. Pressure is applied to the workpiece, which may be accompanied by heat, to make the metal more pliable.

Bending a profile pipe along a radius with your own hands is associated with the following difficulties:

• displacement of the longitudinal axes and planes of the part, which leads to misalignment;
• rupture and appearance of cracks on the outer part of the workpiece under the influence of tensile force;
• uneven compression of the inner part, leading to a corrugation effect;
• change in the diameter or shape of the workpiece.

To know how to properly shape steel pipes into an arch, you need to take a number of factors into account.

Influence of material on the choice of bending method

Profile pipes are made in accordance with the requirements of GOST 54157-2010 and have certain properties.

It is necessary to bend profile pipes taking into account the following parameters:

1. The minimum bending radius of the facing material that is planned to be laid on the arches. For cellular polycarbonate, these indicators depend on the thickness and structure.
2. Profile size and wall thickness. Products with a wall height of up to 10 mm can be bent using muscle force. Profiles from 20×40 mm and larger must be bent in a complex manner using pressure and heat or on a machine.
3. Elasticity (plastic moment of resistance). It must be included in preliminary calculations, giving the workpiece a smaller bending radius.

Based on the analysis of this data, a choice is made on how to perform the task.

Bending methods and bending devices

Using available materials and household tools, you can make a bending device at no additional cost.

As for professional devices, their cost can be several times higher than the price of the material for making arches.

Let's look at ways in which you can make bent rectangular arches of an ideal shape.

Cold

Without heating, cold steel is bent if the master’s muscular strength is sufficient for this procedure. As a rule, these are square pipes with a cross-section of 10×10 mm and rectangular pipes with a cross-section of 10×20 mm.

If the walls of the workpieces are thick, then filling the internal cavity with resistance is not carried out. Let's consider the main options for creating arches from metal blanks.

Lever with nozzle

First, a pattern is made with a certain semicircle length corresponding to the specified parameters. It is made from chipboard, plywood, drywall or boards.

After this you need:

• Securely secure the vise to a heavy, stable table. A piece of pipe with a larger size than the workpiece is firmly fixed in a vice;
• perform bending in several stages by inserting the profile into the hole of the section clamped in a vice and applying force to it.

A lever of sufficient length is attached to the bent fragment to create the necessary pressure to deform the metal. During the work, the curvature is controlled by a pattern.

By mandrel

The mandrel is made on a solid base, which is a concrete or asphalt platform or a large workbench. In essence, this is a special template along the contours of which the profile pipe will bend.

Taking into account the degree of elasticity of the metal, the master needs to give the mandrel a smaller radius.

The procedure is carried out in the following sequence:

• the part is securely fixed to the base;
• the end of the workpiece is screwed to one of its edges with wire or clamps;
• the profile is bent until it is given the desired shape.

The template can be replaced with reinforcement driven into the ground. As the pipe deforms, it is successively welded to the pins. After finishing the work, the arch is cut off from the stoppers.

Using internal countermeasures (sand, water)

This method is used when the profile parameters are less than: height 10 mm, width 20 mm, wall thickness 1 mm. Pipes filled with a dense substance retain their shape better, even under strong pressure on a small area of ​​the product.

The use of sand and water guarantees a high-quality result without defects. And this factor is important, given the cost of rolled steel.

The filler must fill the entire volume of the profile pipe cavity. It is much easier to achieve this with liquid. The sand is compacted by vibration and spilled with water. The holes on both sides are welded or tightly clogged with wooden plugs. If heating is used, it is important to leave one side unclogged to allow gases to escape.

Grinder cutting and welding (sector welding)

Cutting with a grinder and welding does not require significant effort. The master needs to be prepared for the fact that this event will take a lot of time. The advantage of this technology is that there is no chance of damage to the profile; its shape can be adjusted throughout the entire bending process.

The work is carried out in the following sequence:

1. A diagram is drawn up. It shows the distance between the cuts and their configuration.
2. Markings are applied to the profile. Using a grinder, triangular cuts are made along it. The cut fragments are removed.
3. The workpiece is bent. If the metal is elastic and unbends after compression, then the joints are immediately fixed by spot welding.
4. The cracks remaining after compression are welded or sealed. After the metal has cooled, the seams are sanded and painted over.
5. The edges on the arch are almost invisible. When laying polycarbonate, small differences are compensated for by a thick seal.

Hot

Preheating is carried out in cases where the profile pipe has a large cross-section or thin walls. That is, it is either impossible to bend it manually, or it is fraught with damage or breakage of the workpiece. Let us dwell on the techniques that are used for thermal bending of rolled steel.

Using a spring and a blowtorch

The spring is needed to prevent the profile walls from being pushed through during bending. In addition, the elastic insert will give the finished product a neat and even shape. It must be strong enough to absorb and withstand the pressure exerted on the profile.

One end of the section is rigidly fixed in the ground or in a vice. Before bending the fragment, it is heated until the metal turns red.

You can cool the bent area only with warm machine oil - water causes the iron to crack and become brittle.

Using a spring and a blowtorch saves the worker from exerting unnecessary effort.

Hot forming

It is possible to give the desired shape to the profile without preliminary internal filling. When heated, steel becomes so soft and flexible that it can be bent by hand, without the use of levers or complex devices.

For this purpose, a convex semicircular stop is made. It must be made of material resistant to high temperatures. A car wheel or fireclay brick coated with clay is best suited for this. The heated part is applied to the template. After this, it bends in one slow and precise movement. After a few minutes, you can continue the procedure.

Tips and tricks

Giving profile pipes an arch shape is a complex process that requires skills in handling household tools and metal.

When making arches, you should adhere to the following rules:

• It is easier and more convenient to work with short workpieces. Before bending, it is advisable to cut the parts into segments 1.5-2 meters long. Subsequent welding will not weaken the strength of the finished arch.
• Heating of the metal should be done slowly to prevent uneven heating and deformation. The resulting scale must be cleaned off immediately, as it causes corrosion.
• Rolled steel cannot be exposed to temperatures above + 800 ºС. This impact leads to the destruction of the metal crystal lattice. The profile becomes soft or brittle.
• All bending actions should be performed slowly, gradually increasing the load.

How much does it cost to bend a profile for a greenhouse?

The cost of services is determined by the status of the workshop, its geographical location and the equipment used.

The average price for bending profiled steel is (in rubles per linear meter):

1. 10×10 — 80;
2. 20×20 — 100;
3. 25×25 — 110;
4. 30×30 — 120;
5. 20×40 — 125;
6. 20×45 — 130;
7. 40×40 — 140;
8. 50×50 — 150;
9. 60×40 — 160;
10. 50×50 — 180;
11. 80×40 — 240;
12. 80×80 — 360;
13. 100×100 — 480.

Cost may vary depending on market supply and demand.

Special devices for bending

In order to achieve high quality of the finished product, you can use factory-made and home-made devices.

Pipe bender

Pipe benders consist of a frame, several rollers, limiters and a drive. The device is controlled manually, by an electric motor and by hydraulic cylinders. In private construction, profile pipes with a wall height of up to 20 mm are used. A manual pipe bender handles their bending.

Conductor

This tool is designed for precise manufacturing and joining of profile joints when cutting with a grinder and connecting arches with vertical, transverse and inclined posts.

Thanks to the use of a jig, the most accurate connection of parts at right angles and a neat seam between them is achieved.

Bending plate

This device is a removable structure installed on a workbench or on the workshop floor.

For fastening, embedded parts or anchor bolts are used. The curvature of the base plate is adjusted with bolts.

After bending is completed, the equipment is removed and the embedded parts are closed with plugs.

Making a bending machine with your own hands

We already wrote about how to assemble a manual pipe bender yourself in a previous article. This is not the simplest device, but it will allow you to quickly bend fairly large volumes of profiles. For assembly you will need 3-5 blanks for shafts, a channel, an I-beam, an angle grinder, a welding machine and a door with a set of fasteners. The photo below shows exactly the rollers we were talking about.

For today, that's all we have prepared for you. Share your bending methods in the comments and recommend our articles to your friends. See you!

Source: https://vseotrube.ru/montazh-i-remont/kak-sognut-profil-v-domashnih-usloviyah-bez-trubogiba

How to bend a pipe - recommendations and tips for doing work at home

In the modern world, people are increasingly striving to do something with their own hands. There can be quite a few reasons for this: from ordinary curiosity to saving money.

You can talk for a long time about what is better, doing something with your own hands, or hiring a professional, but today we will not talk about that at all.

Today we will talk about how to bend a pipe at home. So without further delay, let's get started!

How to bend a metal-plastic pipe

So, let's start by looking at how to bend metal-plastic pipes. Usually, when installing such pipes, you need to make a lot of smooth bends on them. This will help you make the most of all the capabilities of such a product.

How to make the bend extremely smooth and even? Everything is quite simple, you just need to read the options below:

So, the first and easiest option is smooth manual bending of the pipe. If you decide to bend the pipe in this way, be sure to remember that the bend for every 2 centimeters should be around 20 degrees, or at least within their limits. This is how you can make all the necessary bends on the product.

The next method is more complicated, but it is no less effective. In order to bend a pipe in this way, you need to prepare several pieces of wire of a fairly small size, with the help of which you need to fill the entire internal space of the pipe until it stops. By completely filling the pipe with wire, the bends will be as even and smooth as possible.

These are the two simplest and most common methods; if you are interested in more complex options, go online. Fortunately, there are plenty of different ways.

Advice! If it seems to you that you will not be able to bend the product with the highest quality and without flaws, it is better to contact professionals in their field. This way you will save not only your time, but also the product. Moreover, such work is relatively inexpensive.

How to bend a polypropylene pipe

Now let's look at how polypropylene pipes are bent. Although manufacturers of such structures do not recommend bending products yourself, there are situations when it is not possible to go to professionals just to bend a small product.

Therefore, again, there is a way by which you can bend the pipe:

To bend using the first method, you will need a special construction hair dryer. Using it, you need to heat the pipe to a temperature of approximately 145-155 degrees.

After final heating, you need to manually bend the pipe. Of course you should try to do this without gloves, because it will end very badly.

When bending a polypropylene pipe in this way, you must adhere to one rule: the thicker wall of the product should absolutely always be on the outer part of the curved corner.

Recommendation! In order to further understand the matter, we advise you to surf the Internet in search of even more information that can improve the quality of your work.

Moreover, on the Internet there are quite a lot of different photos of how to bend a pipe. By following this advice, you will bend the pipe as efficiently as possible.

How to bend metal pipes

In order to bend metal pipes, you need to follow the small instructions given below:

In general, when bending metal pipes, they may decrease in diameter or simply break into two parts.

In order to avoid all possible bends and deformations, you need to fill the internal space of the pipe with screened sand, and close the ends of the pipe with special plugs

If we are talking about working at home, then you can simply drive in special wooden plugs, but you need to make sure that they can be easily taken out at any time.

Also, these wooden plugs should not deform the pipe in any way. After all the above steps have been completed, you can safely bend the product.

If the material you are working with is soft enough, then this procedure is very easy to do with your own hands. Moreover, for this you can use, for example, a pipe with a large diameter fixed in the ground.

It is enough to bend using the lever method. If you work in winter, then the internal space can be filled not with sand, but with water.

You just need to wait a while for the water to harden. After this, heat the pipe, melting the ice back into the water.

If we are talking about working with aluminum pipes, then everything is also quite easy. You only need a gas burner.

Before starting work, again, it is necessary to fill the internal space of the pipe with sand and secure one of the ends of the product as securely as possible.

After this, you need to extremely evenly heat the area where the bend will be located in the near future.

If you need to check whether a pipe is heated enough, this is quite simple to do. To do this, you only need a small piece of paper. Bring it to a heated place.

If it starts to burn and smoke, then the pipe is sufficiently heated. If nothing happens, then you need to heat it further. To protect yourself as much as possible, be sure to use gloves.

Recommendation! Prepare in advance absolutely all the devices and materials that you may need during the work. If during work you constantly run to the store for one thing or another, this will have a rather bad effect on the quality of the curved product.

Reminder! Never use heat to bend galvanized pipe. This will end badly enough.

Pipe bending device

A pipe bender for bending pipes allows you to make all bends as efficiently and quickly as possible. This thing has a large number of varieties according to the bending method:

Crossbow. The operating principle of this design is based on the use of a certain shape, which is needed for pipes having a certain diameter

Spring. It is based on a special spring structure made of steel. It helps to avoid deformation and bend plastic pipes with your own hands.

Dornovaya. This design will allow bending pipes with extremely thin walls.

Segmental. The operating principle of this device is based on a special segment that is capable of stretching the product around itself.

Conclusion

If you are seriously thinking about bending a pipe at home, be sure to follow some tips and recommendations.

Try to search the Internet for some useful information in order to understand the matter as thoroughly as possible. Learn more about all types of pipe benders. After all, it’s not always possible to do everything with your own hands.

If you carefully study all the options, you will be able to choose the device that suits you best. This, again, will allow you to bend the pipe with the highest quality and without deformation.

You can also look on the Internet for other information, for example, about how to bend a profile pipe.

Moreover, you need to understand as accurately as possible which version of the product you are dealing with, because sometimes a person does not even know what his pipe is made of. Well, we wish you good luck and success in bending the pipe!

Photo tips on how to bend a pipe

Please repost

Source: https://dachadesign.ru/kak-sognut-trubu/

How to bend a pipe without a pipe bender

Pipes are used in many professional industries today. They are used in construction, manufacturing, mechanical engineering and even in agriculture.

In the process of performing various tasks of arranging a house and the area near it, you also cannot do without pipes. To give shape to the pipes, they must be bent. But how to do that? In this article you will learn how to bend a pipe without a pipe bender (for example, for a canopy).

We invite you to familiarize yourself with simple but effective methods of bending profile pipes at home.

Methods

Bending methods

Pipe bending is carried out in various ways. Some men with strong hands even do this with small diameter pipes by hand. However, this technique is unreliable - there is a high risk of pipe breakage. In view of this, it is better to use available materials or special equipment for these purposes, which, among other things, will make bending much easier.

Plane-parallel plate

If you really need to bend a pipe, and purchasing special equipment in this situation is unprofitable, then you can use a curved plate with a groove for this. With its help you can bend metal/metal-plastic pipes with a diameter of up to 45 mm.

In order to bend a pipe, it should be inserted into a special clamp on the plate, then clamped and bent along the groove. This technique is quite primitive, but as practice shows, it is quite effective.

Only short pipes can be bent on a plane-parallel plate.

Bending Thin Wall Steel Pipe

The diagram above shows a simple plane-parallel plate, where number 1 is the plate, number 2 is the plate, 3 is the clamp, and 4 is the pipe to be bent. It is quite possible to make such a device yourself.

Steel spring

Pipes made of soft non-ferrous metals are thin-walled, so they are a fairly malleable material. This explains the fact that bending pipes made from it often leads to their damage. To avoid this problem, when bending pipes made of non-ferrous metals, a steel spring of medium stiffness is used.

The diameter of such a spring should be slightly smaller than the internal diameter of the pipe. This is due to the fact that it will need to be inserted into the pipe to the bend. After this, the pipe can be bent, for example, on the knee or by first securing it in a vice. A steel spring holds the walls of a non-ferrous metal pipe, preventing them from flattening.

Before inserting the spring inside the pipe, you need to securely attach a long, strong wire to it. This will allow you to remove the spring from the pipe once it has been bent.

Folk method

One of the popular methods is to make a bending device. To do this, you need to weld a small piece of larger diameter pipe onto a long pipe of smaller diameter. Thus, a pipe to be bent is put into the device and formed at the desired angle.

Profile pipe

Methods for bending profile pipes

Before you start bending a profile pipe, it would be a good idea to familiarize yourself with its characteristics, based on which you can choose the method of bending it.

You can learn about the characteristics of profile pipes, as well as methods of bending them, from the article “Methods of bending profile pipes”.

Grinder and welding

Pipe bending with a grinder and welding

One method of pipe bending involves the use of welding and a grinder. In this case, pipe bending is performed in the following sequence:

• The first step is to calculate the radius of curvature of the pipe.
• Uniform transverse cuts are made along the length of the section to be bent.
• Then the pipe can be bent without any effort.
• The sawn areas should be welded.
• Then the bend area should be processed by grinding the welding areas.

This method allows you to bend the pipe at the desired angle.

If this article helped you, be sure to let us know by writing to the article. If you have any questions, you can ask an expert on our site.

The provided video shows how to bend a pipe:

Source: https://kakpravilnosdelat.ru/kak-sognut-trubu-bez-trubogiba/

How to bend a profile pipe at home without a pipe bender yourself

Experienced summer residents and owners of their own homes have long appreciated the versatility and convenience of profile metal pipes. They are used in the construction of porticoes, extensions and gazebos, and are also used as struts for greenhouses and greenhouses. They are also often needed in the manufacture of decorative elements.

When using corrugated pipes in home construction, they are usually bent to give the required shape. There are several common methods by which you can perform this operation without purchasing specialized equipment such as a pipe bender.

Features of bending professional pipes

Regardless of the specific configuration of the profile pipes, the bending process is a mechanical force that gives the workpiece partial or full radial or angular bending.

According to the basics of mechanics, during work, a set of forces in different directions acts on a profile workpiece:

• compression, which has a deforming effect on the surface of the inner part of the pipe;
• tension affecting the outside of the pipe at the bend point.

It is impossible to bend a profile pipe without taking into account the mechanical characteristics of the shape and the material from which it is made. Otherwise, some parts of the workpiece will be completely damaged and unsuitable for use in construction. Another risk associated with incorrectly performing the operation is the risk of the workpiece breaking on the outer (upper) surface during bending. Due to a violation of the technology, the pipe will have to be thrown into the trash or cut into smaller parts.

In order to bend a corrugated pipe yourself, in a home workshop or garage, you don’t need to know all the engineering subtleties of strength-of-material materials.

It is only necessary to take into account the universal rule:

• a thin-section pipe (about 20 mm) bends without deformation over a section 2.5 times longer than the height of the profile walls;
• with a section of 30 mm and above, it bends over a length of section 3 times the height of the section.

Thus, the radius of the inner surface of the bend (R) is determined as: wall height * 2.5 (or 3 depending on the height of the section).

Finally, another important factor is the elasticity of the metal. Because of it, the profile after bending, trying to return to its original shape, bends back, deviating from the given curvature. Therefore, when bending a profile pipe, craftsmen recommend making the bend a little deeper.

Safety precautions

To perform bending and any other operations with metal products, it is better to prepare a separate room.

A garage or workshop is suitable, since in addition to the structures themselves, for work you will have to use, for example, a blowtorch or an argon gas torch, impact or cutting tools.

The work site must be ventilated and free of clutter. Otherwise, sparks during cutting or careless handling of the heat source when heating the metal can lead to fire and smoke.

The experts also recommend taking care of special clothing. An apron and mask will protect you from small fragments and dust, and mittens will protect you from temperature influences and possible cuts. If you have to use an angle grinder, special glasses will be a must.

Bending methods

In order to effectively bend the profile, they resort to the help of specialized, usually expensive, professional tools - the so-called pipe benders. If the homeowner or summer resident is not ready to spend money on the purchase, then you can bend the profile to the desired curvature yourself in a home workshop.

Technologically, methods of radial curvature of profile pipes are divided into “hot” and “cold”. In the first case, bending is carried out on a preheated surface area; in the second, there is no need to heat the pipe before mechanical impact.

Hot method

Heating the metal before bending it is a procedure that makes the structure more viscous, which makes bending the profile much easier.

The workpiece is clamped in a vice and heated using a torch or blowtorch at the intended bend point.

After this, the heated profile (the color of the material should be reddish-white or reddish-yellow) is removed and “screwed” onto a specially prepared blank, made according to the shape with the required angle and radius of curvature.

Important. Using this method, if the bending is insufficient, the metal can be heated again, but this should not be done repeatedly - each time the profile pipe cools down (the color becomes light cherry), its strength characteristics decrease. At some point this may lead to a break or rupture.

We use fillers

Another “universal” technique for changing the curvature of a hollow profile metal structure is the use of a filler that will protect the corrugated pipe from crushing. Depending on the height of the pipe walls, when using fillers (sand or water), “hot” or “cold” bending is used, respectively.

Bending a hot sand-filled surface

In order to reduce the risk of deformation of the workpiece during “hot” bending, sand is first poured into it, which is sifted through a fine sieve (up to 2.5 mm) to break up the “lumps” and remove invasive solid particles.

Using a wooden plug or plug, one end of the workpiece is closed, after which, through the second (open) end, the workpiece is tightly compacted with sand. To make sure that it is evenly distributed, knock on the pipe profile with a rubber or wooden hammer.

As soon as a dull sound is clearly heard along the entire length of the workpiece, it means you can hammer the “upper” end with a second plug. A small longitudinal hole is made in the plug so that during the heating process the gas that accumulates from heating can be etched out there.

After this, the profile pipe is fixed in a vice, heated at the marked rounding point, and with the help of physical force it can be bent to the desired shape. The bend is performed in one grip, smoothly and accurately. Then the plug is removed or burned out, and the sand is poured out of the pipe.

Reference. If it is inconvenient to clamp the profile in a vice due to its length and wall thickness, bending using this method can be done outdoors. To do this, the lower end is not clogged with a plug, but buried in the ground.

Cold bending with water filling

On winter days, when the air temperature drops below minus 5-10 degrees, water filler can be used instead of sand filler to bend the corrugated pipe. The method requires minimal costs, but applies only to thin profiles made of duralumin or brass. There is no need to heat the metal.

The bottom line is that the sealed workpiece is filled with water, and then taken out into the cold and kept there until the liquid completely hardens.

After this, the already frozen part is bent along the profile of the blank template. The profile bent to the required radius returns to the heat. After complete thawing, the water inside is drained.

Bulgarian

The original way to bend a professional pipe is to use a grinder.

To make an angular bend, use a grinder to make 2-5 transverse cuts at the intended point on the inner surface of the workpiece, without touching the outer wall.

Their number directly depends on the size of the angle - the larger it is relative to the straight line, the more notches are applied.

After the notches are made, the profile can be carefully and effortlessly bent, and the notch areas are welded using a soldering iron or welding.

If you then, when the pipe has cooled, grind and sand the welding points, the profile will correspond to the shape required by the master.

Bending with a lever

Finally, another “cold” method of bending a corrugated pipe is a lever. It is a handle made of metal or strong wood, onto which a “nozzle” with a hole is nailed or welded from below.

During operation, the profile blank lying on the floor is threaded into the nozzle up to the bending area. After this, the master presses the handle “on himself” and with the created force bends the profile. This method is not distinguished by the accuracy and precision of rounding the structure, but it can be used in any conditions.

To summarize, we can say that there are many opportunities to bend a profile pipe in a regular garage or workshop without expensive pipe bending equipment.

It won’t be difficult to build a specialized tool or make the necessary mold yourself. And it will cost much less. If a novice craftsman does not yet have confidence in his abilities, he can contact construction and repair companies to hire a worker or rent the necessary equipment.

Source: https://2lzz.ru/sovety/kak-sognut-profilnuyu-trubu-bez-trubogiba

How to bend a profile pipe at home without a pipe bender - Pipes

Due to the fact that the metal structure is much thinner compared to wood, there is more natural light in the greenhouse. This material is also more technologically advanced. When constructing an arched greenhouse, the profile needs to be bent.

It bends for an arch that runs vertically from the base up, and in the middle, in an arcuate manner. For example, if you choose a Mitlider greenhouse, the strength of the frame will be ensured by connecting the posts and beams.

In dome-shaped greenhouses, the structures consist of polygonal frames (aluminum/metal), but they are quite difficult to assemble on your own.

The frame material itself is selected “to suit the design” of the entire structure and its dimensions. If you are going to build an arched greenhouse, the frame of which is made of metal rather than plasterboard, prepare:

• flexible rods (for half-arches) - one and a half meters long, in the amount of 12 pieces; 
• for a building 1.8 m high - 10 pieces of rods, the length of which is 2 meters and the diameter is 30 millimeters; 
• To make a frame, you must begin by identifying the holes for the rods; sometimes you need to bend a square pipe, in which the cross-section is 20 by 20 and the diameter will be three meters.

You will need these tools:

• bending machine;
• profile pipes; 
• tape measure, simple pencil;
• Bulgarian;
• welding.

You can make a bending machine yourself; you actually need to bend the profile pipe on it. Scroll it with the handle.

It will take a lot of effort, even when the wall thickness of the material is about two millimeters, because it’s not like folding drywall! If you don’t have a machine, you can bend it with your hands. Secure the pipes running parallel.

Draw an arc of the required radius directly on the ground, attach the product and bend it so that it becomes exactly the same as in the drawing. The next arc must be bent according to the pattern of the first.

The pipe must be cut into equal parts in advance using a grinder, and then bent according to the sample. In those places where there were undercuts, process using spot welding. The light and strong profile is quite easy to connect to the planes. In addition, it is able to withstand a fairly large lateral load.

Using a Pipe Bending Machine

Anyone who has tried to bend a profile pipe is aware that it is very difficult. It is much simpler and easier to work with drywall, but not in this case! Here a special pipe bending machine or a manual method can help.

Also one of the ways is fire. One part of the pipe is heated, then, using a lever, it is bent at a certain angle.

The disadvantages include the appearance (on completion) - rather unaesthetic and the fact that a lot of physical effort will be required, because this is not drywall!

Of course, using a pipe bending machine you can bend a pipe much more accurately, faster and easier. Holding the handle, the profile stretches along the machine’s rollers, while the other one presses down the material, thereby deforming it.

It is much more “pleasant” to bend a product in this way when it passes through a pipe bender and turns into an arch, moreover, of the radius that was given to it. Using a manual machine, products can be bent to warm up the greenhouse during cold weather.

Make a pipe bender. You will need:

• 3 pieces of roller;
• special bracket with a clamping axis and a lead screw; 
• metal table;
• template and blank; 
• steel pipes with a diameter of 0.7-1.5 cm;
• channel and welding;
• concrete solution.

 “How to make a pipe bender and bend a profile pipe with it”

A lot of necessary information about a pipe bender to ultimately make a frame for a greenhouse.

Cold method

If the profile height is up to ten millimeters, it must be filled. For this you can use sand, rosin or a tightly wound spring. You can do this yourself, for which you will need: a bending plate, a vice and a mandrel, a bending profile (you can either make it yourself or purchase it in a store).

Heated

Material that is not amenable to the cold process must be heated at high temperatures. The pipe is first filled with sand to ensure uniform bending and quality of work. You will definitely need canvas mittens.

Trimmings (logs) will be needed for a pyramid-shaped plug, ten times longer than the base. The base area of ​​the plug itself should be twice the size of the hole it will cover.

Try on how the plugs fit, then make longitudinal grooves on one of them, on each side. On the future bend you need to anneal the workpiece.

Prepare a filler from construction medium-grained sand (it must be thoroughly sifted several times through a sieve with cells of different diameters, first 2 mm, then 0.7 mm). Next, the filler must be heated at a temperature of 150 degrees Celsius.

Plug one end of the pipe with a plug, and place a funnel on the other. The workpiece must be installed perpendicular to the ground, or at an angle, it all depends on the size. And fill it with sand through a funnel. To make it compact, tap the pipe with a mallet.

A hollow sound means full.

Then close the second plug with the end of the pipe through which the sand was poured. Secure the product in a pipe clamp or vice. The welded joint should be on the side.

Very carefully give the required shape to the pipe. In one step, bend it not sharply, but always in a vertical or only horizontal position. Everything worked out.

The plugs can be knocked out (burnt out) and the sand poured out, the material for the greenhouse frame is ready!

 "How does a pipe bender work"

In this video you can see the sequence of actions that need to be performed in order to bend a pipe.

Source: https://trubineproblema.ru/chistka/kak-sognut-profilnuyu-trubu-v-domashnih-usloviyah-bez-trubogiba.html

How to bend a profile pipe at home with and without a pipe bender for a greenhouse and canopy

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Almost every owner has a situation when it is necessary to change the bend of a metal rod to install a greenhouse or install a sewer system. Since it is quite easy to bend a profile pipe at home with your own hands, you do not need to involve specialists for this work.

How to bend a profile pipe at home without a pipe bender

The average homeowner rarely has special equipment available. Therefore, you need to know how to correctly bend an aluminum or steel pipe yourself for a greenhouse, canopy (canopy) and other needs without a pipe bender.

Photo - pipe bending without a pipe bender

It is very convenient to carry out this work using a welding inverter and a household grinder. To begin with, a drawing is developed, from which the required angle will be drawn and calculated in the future. The diagram must accurately measure the rounding.

Step-by-step instructions from an expert on how to bend pipes using a vice, grinder and welding machine:

1. If you plan to bend the corrugated pipe in a semicircle, then at the site of the intended bend, several thin cuts are made using a grinder;
2. You can do the work yourself only if you first fix the reinforcement in a clamping vice. When the cuts are made and cleared of chips, you need to carefully begin to bend the pipe;
3. After the ring is closed, you need to weld the holes that were formed as a result of bending with a welding machine. Some craftsmen use simple soldering irons if the communication has a small diameter;
4. In order for the bend area to be neat, it will need to be additionally sanded and coated with a protective agent - this will help prevent corrosion or premature failure of the joint.

You can bend the pipe evenly using a spring that fits the size of the profile section:

1. Communication is locked in a vice;
2. A spring of the appropriate diameter is inserted into the hole. This will prevent the profile pipe from breaking or taking on an incorrect shape when bent;
3. To make the work easier, you need to heat the joint and carefully manually bend the communication to the required diameter;
4. Various metal products suitable for the slope, say, angle grinders, arches, etc., are very helpful here.

In a similar way, you can try to deform communication using sand . How to properly bend a canopy pipe without using a vice or springs:

1. You need to stop one end of the tube by closing it with a wooden wedge or any other plug;
2. The closed end of the pipe is fixed in the ground or in a vice (if possible). You can also use any other device that allows you to establish communication;
3. After this, you need to pour sand into the open end and heat the blowtorch;
4. The heated lamp needs to be held over the future bend, and then carefully bend the pipe into the desired shape. It is necessary to work quite quickly, because the metal, after it has cooled, will be unsuitable for processing.

training on how to bend a 20 mm pipe without a pipe bender using sand

After bending, it is necessary to leave the pipe in a fixed position for some time - this will help the material consolidate its new shape. If the work is carried out in winter, then the craftsmen expose it even to the cold.

Arch (canopy) without pipe bender

As you know, for a canopy, for example, in the shape of an arch, you need a curved profile pipe. It is important to make sure that the arcs are equally curved, otherwise the canopy will not work. Now we will look at how to do this without using a machine, pipe bender and other aids of this kind.

We will need:

• The support on which we will work, for example, a metal table;
• As a beam, you can take a pipe 80 by 60 or 50 by 50 mm, 3 meters long. But this method is universal - so it doesn’t matter what kind of support beam you end up with;
• A profile pipe 20 by 20 or 20 by 40 mm, which we will bend.

Procedure (step by step instructions):

1. We divide the support into 6 equal parts. It is very important here - exactly into 6 parts, regardless of how long it is;

Source: https://www.kanalizaciya-stroy.ru/kak-sognut-profilnuyu-trubu.html

How to bend a pipe without a pipe bender for a canopy

Creating a bend in a profile pipe by a professional builder or an ordinary owner can often occur during the construction or renovation of any country house or cottage. Having decided to bend a profile pipe with his own hands at home, the owner is always puzzled by how to properly and reliably arrange a greenhouse structure, a covered terrace or a smoking room.

When creating such structures, it is profile products that are used, since they are much more popular in comparison to pipes with a traditional round shape.

Pipes with an ordinary cross-section in the form of a circle are bent using a conventional hydraulic pipe bender with special shoes and rollers for round workpieces. At the same time, it is not possible to bend profile parts on such a machine, since its actuators for round shapes will simply ruin the profile - the workpiece will crack, break, or be completely crushed.

Methods for bending profile elements

You can bend a profile pipe without any defects with your own hands. There are many techniques for producing such bent profile parts. One of the common options is to bend a profile workpiece using special devices - so-called profile benders. However, the price of such equipment is quite high, which calls into question the purchase of such a special machine from an ordinary owner.

how to bend a profile pipe without a pipe bender

In case of a rare need to manufacture bent profiles at home, it is proposed to purchase special pipe benders on the market for manual work, used both for pipes with a round cross-section and for profile blanks.

The cost of such home equipment is approximately $100.

It is worth noting that when using hand tools to create bent parts, the owner must have appropriate physical and mental preparation - the work requires endurance and patience, but sparingly.

If there is a one-time need to make bends on workpieces, it is irrational to buy even manual mechanisms. In this case, it is recommended to purchase an already manufactured element on the market, or you can place an order in a workshop or at an appropriate enterprise, where for a relatively low fee they can produce any part from their own profile material.

With this solution to the problem, you can not only reduce the cost of work and not waste personal time and effort, but also achieve the desired result - get a part with a high-quality and correct bend of a certain diameter or shape.

In every construction and other business there are always folk methods. Bending profile blanks with your own hands is no exception. Only in this case is it possible to produce bends of small-sized steel, copper or polymer pipe blanks.

Process specifics

In the case of self-manufacturing of a bend of a profile workpiece, you must first determine the size of its section, the thickness of the walls, the material from which the part is made, as well as the diameter or shape of the bend.

At the same time, it is also necessary to take into account the conditions of the existing production, which can ensure maximum bending accuracy and high quality of the parts produced.

Bending of profile pipes occurs within certain technical tolerances for wall thickness and cross-sectional configuration. An important task is to prevent such defective phenomena as fractures of the internal part of the bent profile workpiece and crushing of the transverse part of the workpiece.

Making a bend

In order to make a bend, it is necessary to have a special pipe bender designed for cold bending with stretching. The tension created by such a machine will shift the neutral axis of the workpiece towards bending. This effect when stretching the profile part will make it possible to reduce the formation of a corrugated zone on the bending surface.

Source: https://crast.ru/instrumenty/kak-sognut-trubu-bez-trubogiba-dlja-navesa

How to bend a profile pipe at home: methods, execution technology

A canopy is necessary on almost any site: it is a good place to place a car, it is useful for creating a mini-greenhouse, a recreation area, etc. The design of a canopy most often involves the construction of a frame from profile pipes: they are light in weight and have a high load-bearing capacity.

However, they are quite difficult to bend to give the desired shape, so it is difficult to create arched and other complex structures with their help. How to bend a profile pipe at home?

Common methods of bending profile pipes

There are a lot of options for how to bend a profile pipe for a canopy, but in most cases the use of special tools or equipment is required. Let's take a closer look at several main methods:

• Using a welding machine and heated, well-dried sand. This method makes it possible to obtain a smooth line, and thus the pipe can be given the desired semicircular shape. One end of the pipe is closed with a plug, and dry quartz sand is poured into it.

It is needed so that the pipe does not flatten during processing, but acquires the correct shape without unnecessary curvature to one side. The second end of the pipe is closed with a plug with a small hole, after which the pipe is heated with a welding machine or gas torch. Instead of a welding machine, you can use a blowtorch.

Important! With this method, the metal should not be allowed to overheat. In this case, scale will appear, reducing the strength of the metal structure.

This method is generally not applicable to galvanized pipes, since the zinc coating will simply burn off, and the steel will be defenseless against corrosion. Such a frame cannot be installed: it will quickly rust and may collapse at any moment.

• Using a pipe bender. This is a special tool that makes it possible to obtain a pipe of exactly the desired shape. If used correctly, there will be no creases or any defects; the pipe bender allows you to bend even large-sized products.
• For thin pipes, you can use a manual machine; for thicker ones, hydraulic or electromechanical pipe benders are used. It takes a lot of physical strength to operate a hand tool, while anyone can use a hydraulic machine.
• How to bend a profile pipe without a pipe bender? Another accessible method is to use a gas burner and a simple grinder with metal attachments.

In this case, you need to calculate the radius of the future pipe and make several transverse cuts. They will allow you to carefully bend the metal and obtain the desired shape. After bending, the cuts need to be welded.

• There is a homemade way to bend a profile for a canopy. To do this, you need to close one end of the pipe with a plug, then pour dry sand into it. The pipe is closed on the second side and then bent evenly around a metal blank.

This type of work requires skill and physical effort, and is one of the most difficult options. To speed up the process, you can heat the metal with a gas torch.

Each of the listed methods has both pros and cons: in any case, you have to bend profile pipes very carefully, calculating the radius. The metal is not designed for repeated bending, so it is advisable to complete such work in one go.

If you have to do it again, the pipe may simply break; in any case, the load-bearing capacity of such a frame will be much lower. Since artisanal methods are much less reliable, it is better to use a pipe bender.

Advantages and capabilities of domestic pipe benders

How to bend a profile pipe in a semicircle? To give it the desired shape, you can use various models of pipe bending machines and hand tools. Their use is beneficial for several reasons:

1. Pipe bending work can be carried out without special education and skills. Not every home craftsman knows how to operate a welding machine, but a mechanical device will be much easier to understand.
2. It is possible to obtain pipes exactly as originally planned. This is very important if you need to get several identical elements, for example, for building a greenhouse.
3. The metal will retain its characteristics, and there will be no creases or cracks on it. This will allow you to carry out high-quality work and obtain excellent material for the frame of a canopy or greenhouse.

Copper pipes are much easier to bend than steel pipes, so hand tools can be used. To work with profile pipes, a pipe bender with a roller mechanism is used: it was specially designed for such tasks and is the most convenient option.

The most common model of a machine of this type is “PG-1”: three rollers installed on the frame make it possible to bend a square pipe to the state of a complete ring.

The PG-2 pipe bender costs almost one and a half times more; this machine is designed for larger cross-section pipes and more durable metals. The powerful design makes it possible to bend pipes with a profile of 30 by 60 mm.

The easiest ways to bend a profile pipe by hand

How to bend a pipe for a canopy if neither a welding machine nor modern pipe benders are available? There are several bending methods that can be carried out in a regular workshop. Although they cannot boast of increased accuracy, some skill and folk ingenuity allow you to get good results.

• Bending copper pipes using water and a blank. The method is very similar to the sand version, but the use of a welding machine is not necessary. The end of the pipe is closed with a plug, after which cold water is poured inside.

The pipe is closed with a second plug and taken out into the cold. When the water turns into ice, the pipe can be bent on a blank without any problems; this work can be done manually. The method will not give results with steel products.

• Bending using a square spring. You can bend it from ordinary wire, and then it will allow you to give the pipe the desired bend.

The spring is inserted into the pipe, and with the help of a blowtorch, the desired bend area is heated and becomes more flexible. After this, using a blank you can give it a suitable shape without much difficulty.

Such methods always give only relative results. On a machine, the result will be more accurate, but homework largely depends only on the experience of the master. Homemade methods are suitable for creating ordinary frames for greenhouses and greenhouses, but when constructing complex engineering structures they may be useless.

Not everyone can afford to purchase a stationary factory pipe bender, but you can easily use the services of specialists in this field. If you need to bend pipes, it is better to entrust such work to specialists, so as not to doubt the strength of the supporting frame.

Profile pipes make it possible to implement various construction projects and interesting solutions, and correctly executed bends will allow the construction of canopies and other frame extensions with curved elements.

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Source: https://1drevo.ru/page/kak-sognut-profil-dlja-navesa-kvadratnyj-ili-prjamougolnyj

How to bend a profile pipe yourself at home without using a pipe bender

You don’t often encounter the need to bend profile pipes in everyday life. Owners of summer cottages or private houses most often find themselves faced with this task - people who are accustomed to doing everything with their own hands.

What is the difficulty of bending profile pipes?

Regardless of the shape of the pipe profile, the essence of the bending process is to give the product a partial or full bend. This can only be achieved by applying a certain external influence - exclusively pressure or a combination of heat and pressure.

From the point of view of physics, during the bending process, two multidirectional forces simultaneously act on the profile pipe:

• Tensile force. Appears on the outside of the bend.
• Compression force. Directed towards the inside of the bending area.

The opposite direction of these forces is precisely responsible for some of the difficulties that often arise in the process of bending pipes:

• Different sections of the pipe in the bending zone may change shape differently, which will inevitably lead to a violation of their alignment.
• The pipe wall on the outside of the bend may lose strength or even burst under strong tension.
• On the inside of the bend, on the contrary, folds often form during compression.

To avoid these troubles and not get a crumpled metal surface instead of a smoothly curved pipe, you should definitely take into account the type of material and numerous geometric parameters of the product: wall thickness, cross-section diameter, bending radius. Knowing these characteristics will allow you to choose the optimal bending method.

Note! Experts say that it is better not to bend profile pipes with a wall thickness of less than 2 mm. The strength at the bend points will be quite low, even with perfect adherence to the technology. For such pipes it is better to prefer welded joints.

The principle of using a pipe bender

It is not always possible to bend a profile pipe (especially for large-diameter products) with your own hands. For these purposes, there are special devices - pipe benders. A standard pipe bender is equipped with a drive wheel, which, moving along one of the edges, carefully bends the pipe section in the required direction.

There are two types of pipe benders:

• Manual. The wheel of the device is operated manually using a special handle. Well suited for pipes with a small cross-sectional area.
• Electrical. The use of such devices is justified in cases where the volume of work is quite large, and the pipes themselves have substantial dimensions. The device is connected to a standard power supply, and the wheel moves by means of an electric drive. Allows you to obtain smoother products with significant time savings.

If the work is one-time, purchasing your own pipe bender may not be profitable. In this case, you should consider renting the device, or consider one of the alternative bending methods.

Is it possible to bend a pipe at home?

If the pipe does not have the largest dimensions, and bending accuracy is not a critical parameter, it is possible to carry out the necessary work at home.

Of course, it will be better if there is a separate room for this work, equipped with a workbench, a vice and other necessary tools. In addition, during the work you will most likely have to use an angle grinder, a welding machine or an open flame source. Agree, a private house or apartment is not suitable for this.

Another important tip. Metal is a fairly elastic material that, after any deformation, will strive to regain its previous shape. For this reason, the pipe should be bent at a slightly larger angle than the design provides. The metal will return a few degrees back, and we will get exactly the bend radius that we originally expected.

To facilitate the bending procedure, the corresponding section of the pipe can be preheated. The hot metal becomes more ductile and pliable, which greatly facilitates the process. For warming up, they most often use:

• gas burner,
• blowtorch.

The pipe is thoroughly heated at the site of the future bend (the length of the heating site is taken to be equal to six pipe diameters).

We recommend that you read: Rules for installing stainless steel chimneys

It is worth remembering that repeated cycles of intense heating and cooling inevitably make the metal more brittle.

Alternative bending methods

Fortunately, you don't need any special equipment to bend pipes. People's ingenuity has long invented more than one way to achieve the desired result without using a pipe bender.

We use an angle grinder

In the area where it is necessary to bend the pipe using a grinder, several cross cuts are made. The smaller the bend radius, the more cuts will be needed. In most cases, three is enough. Next, the profile pipe is bent without much effort, and the cut points are sealed using welding.

If the welded areas are carefully sanded, the resulting product will look very decent . There will be no folds or significant loss of strength at the bend. But this method will not give ideal roundness, because the bend will consist of several straight sections located at an angle to each other.

Spring method

To make a spring you will need steel wire with a cross section of 2 mm. The wire is bent to the shape of the profile so that the side of each segment is several millimeters smaller than the corresponding side of the pipe profile and can move freely along its internal length.

Next, the spring is simply inserted into the pipe and bent to the required radius. To facilitate the bending procedure, the pipe section can be heated.

Note! To avoid problems with removing the spring from the cavity of the profile pipe after the bending procedure, a piece of wire should be securely attached to its nearest end.

Filling the pipe with sand

This method is striking in its simplicity and efficiency, because all the necessary materials are literally under your feet:

• We first prepare two wooden wedges that can tightly close the pipe cavity.
• We hammer the wooden wedge tightly into the end of the pipe.
• We fill the pipe with sand, previously sifted and dried.
• We drive in the second wedge.

Next, one of the ends of the pipe is fixed and bent. To facilitate the procedure, the pipe section can also be heated. At the end of the work, the wedges are removed and the sand is poured out.

Using a dense sand bed will help prevent warping by ensuring an even and strong bend.

Plain water will help

One end of the profile pipe is closed with a plug, after which water is poured into the cavity. An indispensable condition is the presence of a negative temperature sufficient to freeze the liquid. After the water freezes, the pipe will bend without any problems, and the bend will be beautiful and durable.

It is important! The method is suitable for pipes made of non-ferrous metals that are not subject to corrosion.

Necessary equipment

To perform work on bending a profile pipe without using a special pipe bender, you will need one of these simple devices:

• Elementary lever with a template.
• A horizontal plate with several holes in which metal stops of the appropriate diameter are arranged. The device is well suited for pipes made of soft metals, or products with a low profile height (no more than 10 mm). Filigree precision cannot be achieved here. In addition, significant physical effort may be required.
• Roller devices. One end is securely fixed in a vice, and a roller is applied to the bend, which, with appropriate physical impact, will ensure an even bend of the required radius.
• Special mandrel. The device is a kind of template made of thick plywood or wood. With some effort, the pipe can be placed on the mandrel, giving it its bending radius. The device will be useful if it is necessary to frequently perform work on bending profile pipes.

Source: https://InfoTruby.ru/metallicheskie/sgibanie-profilnoj-truby