How to mark a pipe at 45 degrees
When installing a pipeline, it is often necessary to cut the pipe at a certain angle. Accuracy plays a big role in this task. There are several simple ways to cut a pipe at an angle.
An incorrect pipe cut will make it impossible to install the structure of the shape that was originally intended. For example, if you plan to rotate the system by 45 degrees, then it is necessary to cut the pipe at 45 degrees. To complete the task, you will need marking tools and a grinder (it can be replaced with a hacksaw).
Marking a corner with a piece of paper
Marking with a paper sheet is one of the simplest ways to complete the task. A square sheet is required. It folds exactly diagonally. The resulting template for cutting pipes must be wrapped around the product so that the long side runs parallel to its cross-section.
Then an angle of 45 degrees is formed on the smaller side. All that remains is to mark the cut line using a construction pencil or marker on a sheet of paper.
It is recommended to wrap the marking area with narrow tape to prevent it from being accidentally erased. This method is excellent for long, large pipes with the cut location approximately in the middle of the product.
Method of marking using a container of water instead of a pattern
This marking method is suitable for small-diameter pipes that are planned to be cut at a certain angle close to the edge. First you need to prepare a deep container of water. The planned angle of inclination is marked on it. Now you need to carefully immerse the end of the product in the liquid, tilt it towards the mark, and then pull it out.
As a result of such actions, a clear line of contact with water will appear on it; it needs to be highlighted. The pipe is cut along it at an angle. This method is best suited for jobs that require multiple markings.
Using the computer program
To implement this method of marking pipes for cutting, you will need a computer with special programs. First, you need to draw up a drawing that shows the transverse dimensions of the product, as well as the planned cut angle. You need to get a virtual template.
Source: https://crast.ru/instrumenty/kak-razmetit-trubu-pod-45-gradusov
Do-it-yourself cutting of plastic, wood, and drywall with regular paper
Today, plasterboard is widely used in construction and renovation. You can work with this material yourself. However, you should first find out how to cut drywall so that no difficulties arise during the repair process. Below are the basic ways of working and the tools you will need.
Cutting tools
How do you cut drywall? To cut it, there are special devices that
First of all, you need to mark the sheet of drywall so that you can cut it straight. This is done using a tape measure, a simple pencil and a long ruler.
Several tools can be used to cut the material. So, how to cut drywall:
- hacksaw for metal;
- construction knife;
- jigsaw.
In rooms with high humidity, moisture-resistant plasterboard is used. It differs from ordinary material by the presence of antiseptic additives in its composition. Some people have a question about how to cut moisture-resistant drywall. It is not much different from regular material. It can be easily recognized by its green color. When cutting it, you can use the same tools. Let's tell you in more detail how to work with each of them.
The best way to cut drywall
A hacksaw for metal differs from the one used to saw wood because it has a thinner blade
A construction knife with a sharp double-sided blade can easily cut a thick sheet of drywall. To make the edge of the sheet even, you should first draw a marking line and attach a metal ruler to it. An incision is made along it with a knife. If the drywall is thin enough, you can replace the construction knife with a regular stationery knife, which is used for paper.
A jigsaw is convenient for making shaped cuts. When working with drywall, it is recommended to purchase files with fine teeth, which are used for metal.
How to cut drywall correctly
There are several useful tips that will make your work easier:
- Drywall is a flexible material. To avoid breaking it during operation, you need to place the sheet on a stable, flat surface.
- When cutting a large sheet, you should do it gradually.
- There should be no moisture in the workplace, otherwise the material will become wet and unsuitable for use.
- Which side you cut the drywall from is not so important. However, it is best to make the cut on the surface on which it will be attached to the wall.
- When cutting the profile, do not worry about uneven edges. They will subsequently be covered with a sheet of drywall.
- When working with the material, you should understand that it can crumble a lot and create dust. Be sure to protect your eyes and respiratory system.
Cutting along straight lines
First you need to lay the drywall on a flat horizontal surface and
Some people think that they can do it just fine without a ruler. However, you should not neglect it. It is quite difficult to make an even cut without it. Of course it is possible, but you will have to take the time to get a neat edge. With a ruler, everything is done much faster.
When the cuts become deep enough, a sheet of drywall should be placed on its edge and tapped on it from the back side. Typically, several weak blows lead to a break in the drywall sheet along the line. Now all that remains is to cut the cardboard layer with a knife.
Shaped cutting
There are situations when you need not a straight cut, but a curved or round one.
They need to work slowly, drawing clearly along the intended lines. The saw should be narrow with small teeth. It must work at high speed. If you cut carefully, the edge will be smooth.
If you don't have a jigsaw, you can use a hacksaw or a construction knife and a hammer. Make deep cuts strictly according to the markings. Place the drywall on a flat, recessed surface so that it sits underneath the hole you are cutting. Now hit this place with a hammer. After the unwanted part falls off, turn the drywall over and cut off the excess paper.
Edge processing
When drywall is cut, its edges should be slightly aligned so that there is no
The final stage of preparing the material includes its fascia. To do this, you need to cut off a few millimeters of gypsum from each edge (about two-thirds of the sheet thickness). The chamfer is removed with a plane or knife at an angle of approximately 45 degrees.
After installing the drywall, all gaps between the sheets of material must be filled with putty. When the seams are dry, you can begin painting the surface or wallpapering it.
How to cut a profile
Drywall sheets are attached to a special profile.
It is made of metal for maximum structural strength. How to cut a profile for drywall ? You can cope with this work using:
- hacksaws for metal;
- jigsaw;
- metal scissors.
It is not recommended to use a grinder at home because it produces a lot of sparks. Metal scissors will be quite sufficient. They are able to easily cut iron without creating unnecessary debris and shavings.
The profile can be cut into small pieces. Once the drywall is attached, it will not be visible. The main thing is to screw the profile well to the wall or other surface to ensure the strength of the entire structure.
Working with drywall is quite simple. Due to this, it is in great demand for interior decoration. Now that you have learned how to cut drywall, you can independently change your apartment beyond recognition without spending money on professional finishers.
source: .ru
This very effective method will certainly be of interest to many home craftsmen. Using regular paper, you can easily saw even hard materials such as wood and plastic. And most importantly, the cut line is very smooth and thin. For high-precision work, such an invention is simply irreplaceable.
Necessary materials
To create our cutter, you will need the following:
- Grinder (but can be installed on a drill, screwdriver or sharpening machine);
- Plain sheets of paper (plain white office paper, A4 format).
Product creation process
To begin with, we need to take sheets of paper, a couple of pieces will be enough. We put them together and align them. Then cut in half using scissors.
The next work will be related to drawing. You can take an ordinary compass and draw circles on previously cut sheets. Then cut it out with scissors. But here you can simplify your task a little. Using a special cutting compass, you can eliminate the issue of drawing a circle. We will need to cut out three circles.
Next, we take regular paper glue pencil and glue our blanks together. An important nuance: when gluing sheets of paper, they can shrink and waves form on them, but on cut out circles, such a tendency is not observed.
Let's wait a little until the glue dries and proceed to further manipulations. In the center of the circle, you need to cut a hole so that it can be installed on an angle grinder. Our cutting disc is ready.
Now we install it on the grinder, all the manipulations are the same as with a regular diamond disc. Let's start testing our product.
It cuts plastic, PVC pipes and other similar materials like butter. The situation is exactly the same with wood. Drywall is a little harder to saw, but the paper disc does the job.
The only thing worth considering is the fragility of this technology. But for solving small problems associated with sawing something, our paper disk is extremely irreplaceable. In addition, this attachment is perfect for drills and screwdrivers; we can say that it is universal.
Important: when working with power tools, be sure to use eye and respiratory protection.
source: izdoski.com
(26 4,68 out of 5)
Source: https://good-health4you.ru/stati/rezhem-obychnoj-bumagoj-plastik-derevo-gipsokarton-svoimi-rukami.html
How to cut a pipe at 45 degrees with a grinder
When working with construction or plumbing tasks, you need to know how to cut a pipe evenly with a grinder. In this article we will look at quick and easy ways of how to properly cut a pipe with a grinder so that the result is perfect.
Cutting pipe at an angle of 45 and 90 degrees
If you need to cut a pipe at an angle of 45 degrees, which is often required when laying water and heating pipes. Often steel and cast iron pipes that have a cylindrical shape are used. In installation work, rectangular or profile pipes are used. However, you should cut the pipe correctly with a grinder so that you can easily connect it later. Therefore, you should carefully mark the pipe.
Some craftsmen try to mark the cutting area using a tape measure, but we warn you that the result will most likely be negative. And for a positive result, consider the following recommendation from professionals.
Take a sheet of paper or cardboard, preferably A4, fold it diagonally and wrap it around the pipe where you plan to make an even cut. The edges of the paper must be absolutely aligned with each other. And the side of the paper that is closer to the end of the pipe was perpendicular to the axis. Then mark a cutting line in a circle.
If you need to cut exactly at an angle of 90 degrees, then solve the problem quickly using paper or masking tape. Wrap it around the pipe so that the ends match. Make an even mark and saw off.
How to cut a profile pipe evenly?
Craftsmen advise using a square when cutting a profile pipe. To do this, apply the square to the sides one by one, and turn and apply marks with smooth movements. After the steps, secure the pipe and cut. Prepare yourself a template that will be useful in the future and will save time. It is better to carry out the action with a grinder, so the cut will be smoother.
How to cut a cast iron pipe?
When working with cast iron pipe, keep in mind that it is a fragile material. Therefore, we will find a way to cut such metal without damage.
Before starting work, make notes for the cut, as you would when working with steel pipes. Place a wooden beam for support. Run a grinder around the circumference of the pipe, making small cuts. Then take the chisels, insert them into the groove and hit them hard with a hammer. Please note that Bakelite-based cutting discs are used to cut cast iron pipes.
If you don’t have a grinder at hand to cut a cast-iron sewer pipe or other purposes, use a hacksaw, chisels or special pipe cutters.
How to cut a gas pipe?
Cutting a gas pipe is a dangerous action, so it is best to leave it to professionals. But if you are confident in your abilities, then use a grinder, welding, hacksaw, or gas welding to cut metal.
- Before work, turn off the gas supply riser. Then release the rest of the gas from the pipe. To do this, light the gas in the burners and wait for it to go out.
- After these steps, cut. Using a welding method, the metal base burns when exposed to high temperature. The result is fast and effective. But remember that cutting or rooting gas pipes again requires experience.
Methods for cutting large diameter pipes
For cutting large diameter pipes, such as sewer pipes, there are a number of reliable tools available. Next, let's look at some of them in detail:
- The grinder is an inexpensive and accessible option, but it is considered not the safest when working with such materials. If you decide to use this method, be careful and use protective equipment.
- A roller machine (pipe cutter) is a tool adapted for such manipulations. The device is attached and material removal begins. The clamping force is adjusted using mechanical devices. It is important to note that machine models differ in shape, so before use, consider the size relationship with the pipe.
- Gas cutting is the most popular option for cutting larger diameter pipes and sheet metal. The cut occurs due to the action of a high intensity flame, the metal melts and leaves the cut zone with a gas flow. This method is convenient and effective.
Source: https://ostwest.su/instrumenty/kak-obrezat-trubu-pod-45-gradusov-bolgarkoj.php/
How to cut a profile pipe at 45 degrees
· 09.09.2019
When installing a pipeline, it is often necessary to cut the pipe at a certain angle. Accuracy plays a big role in this task. There are several simple ways to cut a pipe at an angle.
An incorrect pipe cut will make it impossible to install the structure of the shape that was originally intended. For example, if you plan to rotate the system by 45 degrees, then it is necessary to cut the pipe at 45 degrees. To complete the task, you will need marking tools and a grinder (it can be replaced with a hacksaw).
How to cut a pipe at 45 degrees?
» Other »
Question for experts: how to cut a pipe with a diameter of 325 at 45 degrees? or where can I find a radius template?
Best regards, 1
Best answers
Two options are obvious. First: cut an elliptical hole in a galvanized sheet (hardboard and similar hard material) (with a grinder, jigsaw, etc.). Place it on the pipe, tilt it all the way, and outline it with chalk. The major axis of the ellipse is 460 mm, the minor axis is 325 mm.
How to draw a correct ellipse has already been answered. otvet.mail /question/46152129/
Second: cut out a template from a soft rolled material (paper, glassine, etc.) - a rectangle with a length of 1020 mm (the width does not matter how much, for example 500 mm), while one of the long sides is a sinusoid with an amplitude of half a diameter ( 163 mm) .
It’s easy to build a correct sinusoid with the help of a schoolchild (they build a sinusoid at school point by point) and an engineering calculator. We wrap the pipe with this rectangle and outline the edge of the sine wave with chalk.
Glue a triangle out of paper with an Angle of 45 and a hypotenuse of 325xPI AND ON IT'S PIPE..
They say there is such a thing - STUSL
In the same way as skirting boards are cut at 45 when corners are laid in apartments. only the template will be larger and the metal sheet will be longer. You will most likely have to cut by hand. but it’s better than nothing, unless of course there are special band saws. or you just need guides that will fix the blade relative to the pipe at 45.
answer
This video will help you figure it out
Answers from experts
This is already from descriptive geometry. Hole shape is ellipse. Small diameter is a pipe diameter of 102 mm. The large diameter is two radii of the new hole, and the radius is the square root of the sum of the squares of the pipe radius - 51mm. If we draw from the radii of the pipe and the radius of the resulting hole, we have an isosceles triangle, the base R of the pipe is 51 mm, the height is equal to the radius of the pipe, also 51 mm, and according to Pythagoras we find the large radius of the ellipse as the hypotenuse of the specified right triangle.
The resulting radius is 71.12 and the diameter of the new hole is 144.24 mm.
Descriptive geometry.
In general, I drew a line on the pipe and bent a template out of wire along the line.
When I removed the chimney from the bathhouse, I was also interested in this question.
With geometry on YOU. On a piece of paper I drew a pipe on a smaller scale and drew a line at an angle of 45 degrees. , measured the distance. The shape will be an ellipse with the length you have measured, but the width will not change, in your case it will be f102mm. At a glance it will be approximately 140mm.
Draw a line along the center of the pipe along the horizon (up and down). From the edge of the pipe, step back this size of the pipe diameter and draw it in a circle. Draw a line from the top of the edge of the pipe to the bottom marking
You cut and get an angle of 45
Source: https://dom-voprosov.ru/prochee/kak-otrezat-trubu-pod-45-gradusov
How to cut a pipe at a 45 degree angle
Pipes are a widely used building material. They are used in the installation of various systems. A common occurrence during the installation process is when pipes need to be joined at an angle. However, the technology for producing such work does not seem quite common.
To create this connection configuration, the pipes must be cut at an angle. Let's look at how such operations are performed and what cutting methods exist.
Techniques for cutting pipes at an angle
When considering work methods—cutting straight or at an angle—one should take into account the different materials of the products being processed. Thus, hoses made of polypropylene or thin copper are easier and easier to cut than thick-walled steel pipes.
Plastic products of small diameters are cut at the desired angle using special scissors. In this case, you can control the angle with a regular protractor.
It is necessary to cut pipes very often when working with these installation elements. A popular tool for such cases is the so-called grinder. This tool can be used to cut straight and at an angle.
The most common installation need is cutting water or other pipes at an angle of 45º. Let's find out what devices can be used for cutting at this and other angles.
Paper pattern for pipe
To perform a relatively accurate cut, you can use a simple technique, where an ordinary sheet of paper acts as a kind of pattern. For example, A4 printer paper is well suited for creating patterns. The sheet is first marked into a square using a ruler. The diagonal size of the square should be equal to the circumference of the pipe that needs to be cut. Excess parts of the sheet are cut off.
The simplest way to obtain a marking line on a pipe for making a cut at an angle of 45 degrees. A regular sheet of paper is used, which is placed on the pipe body in the cutting area
Next are the following steps:
- Bend the sheet diagonally, aligning opposite corners.
- Rotate the resulting triangle so that the hypotenuse line is perpendicular to the axis of the pipe.
- In this position, wrap the tube surface with paper, aligning the extreme points of the hypotenuse together.
- Use a marker to mark the cut along the line of any of the legs of the triangle.
- Cut the pipe along the marked line.
This method is quite convenient for marking and cutting pipes at an angle of 45º in the diameter range from 32 to 63 mm. For greater ease of marking, it is recommended to use thick but soft paper. You can also use paronite and similar materials.
Programs for calculating cutting angles
Pattern cutting technology allows you to obtain different cutting angles. But to form a pattern at angles other than 45º, you will need to perform mathematical calculations and cut out a template from paper or similar materials based on the calculated data. True, there are computer programs designed to save the master from making calculations. Patterns for cutting pipes are printed by such programs on a printer.
This is what the window of a computer program looks like when calculating the cutting angle for a circular section. Based on the calculation results, a pattern is drawn that can be printed.
A template is cut out according to the pattern
A simple calculation program created on the basis of the MS Excel application allows you to calculate and draw up a pattern for almost any pipe diameter and required cutting angle.
All the user needs to do is enter the appropriate values in the “Outer diameter” and “Cut angle” cells. Using these parameters, a pattern will be generated that can be sent for printing.
An example of a pattern obtained by calculation in the popular Excel program. The calculation of the curve passage points is carried out on the basis of only two specified parameters - the pipe diameter and the required cut angle
The disadvantage of the program is that it does not take into account the thickness of the pattern sheet, which leads to minor inaccuracies.
Miter box for cutting pipes
There is a simple tool that is often used in everyday life, mainly for working with wood. It's called a miter box. So, this same device is suitable for cutting pipes, and at different angles. The miter box is commercially available, but if you wish, you can always make it yourself and adjust the structure to the desired pipe diameter:
- Take a wooden board with a width equal to the diameter of the pipe and a length of 400-500 mm.
- Take two more boards of the same dimensions, but increased in width by the thickness of the first board.
- From three boards, assemble a structure in the form of an inverted letter “P”, where the first board is installed as the base.
- In the central part of the structure, mark a rectangle, two sides of which run along the inner boundaries of the side boards.
- Divide the rectangle with diagonals and, along the lines obtained on the upper edges of the side boards, make cuts down to the base.
In this way, a template is made for cutting at an angle of 45º. But with the help of a protractor you can mark almost any angle and make cuts to cut the pipe for a specific angle. The advantage of a miter box is that the tool is suitable for repeated use. Working with the tool is permissible until the walls of the slots are worn to such a degree that they can provide high cutting accuracy. It is recommended to make the walls of the instrument from a material of higher strength than wood.
This is what a possible design of a miter box looks like - a device that can also help cut pipes at different angles.
However, a miter box is, as a rule, convenient to use for cutting pipes of small diameters and with small wall thickness
The advantages of the method are obvious - simplicity, ease of making a tool (miter box), efficiency, versatility.
The disadvantages of working with this type of equipment are the need to adjust the dimensions of the miter box to the pipe diameter, provided that an accurate cut is performed. That is, for each pipe you will have to make your own tool.
Also, using a miter box, you can only cut a pipe with a hacksaw or pruning shears (for plastic products). This tool is not suitable for working with thick-walled metal pipes for cutting with a grinder.
Simple cutting equipment
Metal products of round and rectangular shapes with fairly thick walls can be conveniently cut at an angle using simple electromechanical equipment. The cutting element of such a tool is a cutting disc or circular saw mounted on the electric motor shaft. In turn, the electric motor with the cutter is part of the entire equipment, which includes a work table, a pendulum support, and a clamp.
An electromechanical device for cutting pipe elements, including at different angles. A disc cutter and a simple mechanical system for fastening the pipe in different positions are used.
To install the pipe at the desired angle and then fasten it, a regular clamp and two metal corners are used. One corner (short) is attached to the base of the rotating mechanism - the pendulum. The second corner (long) is in a free state.
Pipe laying and cutting procedure:
- The rotating mechanism sets the required cutting angle (for example, using a ruler and a protractor).
- The found position is fixed with clamping screws.
- A pipe is placed between the short and long corners and pressed with a clamp screw.
- Voltage is supplied to the electric motor.
- By applying a slight pressure force to the cutter disk, the pipe is cut in the right place.
The advantages of this technique are fast work, accurate cutting, and the ability to process a large number of pipes in a short period of time. Disadvantages: restrictions for use in domestic conditions, increased noise, work with pipes of only small and medium diameters. In addition, the cutting process with equipment is performed stationary at a distance from the installation site, which is not always acceptable.
The nuances of working with a rectangular section
To cut rectangular products, it is recommended to prepare template corner cuts in advance. They can be easily made from a metal corner, having previously been marked with the same protractor.
Cutting rectangular pipes (profile elements) at the desired angles is usually performed using templates. Such templates are made from metal corners of different sizes.
Marking can be done at different angles. To use a template, just attach it to the rectangular pipe in the right place and mark the cutting line. Then use any suitable tool to make a cut along the intended line.
Precision cutting devices
Among branded devices that could be used in everyday life to make cuts at an angle, you can pay attention to Italian-made equipment. The Mini Cut band saw from the MASS company is a small-sized device with manual clamping, for working not only with pipes, but also with angles, rods, and profile elements.
A convenient and productive device for cutting pipes of small and medium diameters. The cutter is made on the basis of a steel strip, which can be installed to make cuts at an angle
The machine supports setting the cutting angle from 0 to 45º.
The procedure is carried out using a tape at a speed of 45 reciprocating movements per minute. The device is equipped with a 370 W electric motor, which is powered from a household network.
Laying depth of sewer pipes in a private house
The maximum permissible diameter of a round pipe to be cut is 65 mm.
Industrial models (using the example of BSM)
There are special machines for industrial use to perform precise miter cutting operations. A good example: devices produced under the BSM brand. The machine manufacturer is the German company Rexinger. True, the BSM series machines are designed exclusively for working with polypropylene pipes of fairly large diameters. Processing of products such as PP, PVC, PE, PVDF is supported.
Industrial machine for cutting pipe products made of polymers. Designed to work with large diameter products, but has equipment for processing pipes from 50 mm.
The machine provides cutting in a wide range of angles
The cutting tool of the machine is a band saw, thanks to which cuts are made at angles from 0 to 67.5º. The accuracy of the process is ensured by a laser cutting recognizer.
Despite the configuration of the device for large-diameter products, you can use a special table, which can also be used to successfully cut pipes of small diameters (50 - 200 mm). A wide range of BSM devices is produced.
Application of thermal methods
In addition to mechanical methods, thermal methods are often used, where welding or cutting machines are used as tools. For example, an autogenous gas cutter or a conventional welding machine (DC/AC). With the help of such machines, thick-walled metal pipes can be cut. However, it is extremely difficult to obtain a perfectly even, high-quality cut using electric welding or gas autogen.
Cutting technology using electric welding and autogen is widespread everywhere. The technique does not provide high cutting accuracy, but when installing pipes this factor is often not decisive
Typically, after thermal cutting, products undergo additional processing.
The cut line is aligned and the required angle values are adjusted. This approach is economically unprofitable, as it is accompanied by additional costs for mechanical processing. As a rule, thermal cutting techniques are used in industrial production conditions.
True, housing and communal services also often resort to this technique.
Thermal cutting is also used to work with plastic materials. There are devices - thermal guillotines. The sharp thin blade of such devices is heated to a high temperature, after which the cut is performed.
Thermal guillotines support cutting at an angle, and this is their advantage. However, these devices cannot be used to work with materials that are more rigid than polyvinyl chloride, wood, or chipboards.
Conclusions and useful video on the topic
The video presents calculations and shows a workshop on cutting a pipe at angles of 45 and 90:
For each individual installation case, you can choose the most convenient and less expensive cutting method. The specific choice depends on the pipe material, its diameter, and wall thickness. Using simple marking methods, you can get a fairly accurate angle at which you want to cut the workpiece. At the same time, using a complex calculation technique, it is possible to cut at non-standard angles with high accuracy.
Source: https://potolki-72.com/kak-otrezat-trubu-pod-uglom-45-gradusov/
How to cut a profile pipe evenly
In households, profile pipes are widely used in the manufacture of greenhouses, greenhouses, canopies to protect vehicles from precipitation and other structures. When working with this material, it is useful to know how to cut a profile pipe along a line or crosswise with the most accurate angle.
Among the large number of construction metal cutting tools, the leader in speed, ease of cutting and efficiency is the angle grinder (grinder), which is often present in the tool kit of any home craftsman. To cut a profile steel pipe using a grinder, you will need a regular metal disc and strict adherence to safety rules - breaking the disc into segments at high rotation speeds can lead to serious injuries.
Fig.1 Profile pipes in the household
How to cut a profile pipe straight across
Most often in households, a rectangular or square pipe metal profile with a wall thickness of no more than 3 mm is used, and cutting into separate sections is necessary when carrying out work on assembling welded frames.
To cut a pipe correctly, additional devices are used to mark and mark the cutting line; some of the devices serve as a support edge for the cutting disk.
What tool is used
As noted above, the main tool for cutting metal parts at home is an angle grinder; if you don’t have one, you can use a hand-held hacksaw or a jigsaw, which can also cut metal materials with a special diamond-coated blade.
For cutting with a grinder, cut-off electrocorundum discs are used, which are not intended for grinding operations. As an auxiliary tool, a tape measure, a metal ruler, various types of clamps, pencils and markers for marking will be useful.
Other options
A good option for making a template is to use a short piece of larger diameter pipe for marking, the guide edge of which has been pre-cut at the desired angles. When marking, the part is placed on the pipe to be cut, after which its surface is marked with a marker or scriber. The second method is to rigidly fix the template on the workpiece using wedges or clamps, followed by cutting with a metal disc with light pressure on the side surface of the template part.
In order not to cut metal pipes or sheets of iron by eye, some home craftsmen use homemade fastening devices for the grinder, rigidly securing it to a vertically mounted spindle. When moving the tool from top to bottom, a stable, even cut occurs on the part located under the disk; if metal guides are fastened to the machine bed, then when a workpiece is applied to them, any desired cutting angle can be obtained.
Fig.5 Working with thick-walled steel
Cutting large diameter profile pipe
A large-diameter metal profile has thick walls and a lot of weight; if for cutting thin-walled parts (wall thickness up to 2 mm) it was possible to use thin disks of about 1 mm in size, then for cutting thick-walled metal they take 2 mm.
disc circles.
Accordingly, it is more convenient to cut thick walls with a large-diameter disk using a powerful large-sized construction angle grinder - household devices do not have enough power to quickly carry out work, and their small disks quickly wear down.
When performing work, they are guided by the following rules:
- When cutting heavy pipes, they should be placed on a flat surface or low supports in such a way that when cutting the last section, it does not change its position or falls down, preventing the cutting tool from being compressed by its walls.
- If the surface is flat, each face is cut completely, turning the part over; if the support is uneven, the last jumpers are not cut a little, allowing the workpiece to separate under its own weight, after which the protruding area is sanded.
- When working with a grinder to cut heavy metal elements, it is necessary to use a protective casing - the likelihood of the disc delaminating into individual elements is too high.
Many people work with the wrong direction of rotation towards themselves - this leads to the fact that the sharp edge of the metal is constantly raised, the tool is more difficult to hold in a fixed position, and the cutting disc wears off faster. In addition, the reverse direction of rotation of the cutting wheel is dangerous from a safety point of view.
How to cut a profile pipe lengthwise - cutting technology
If cross-cutting a profile does not cause any particular difficulties, then a longitudinal cut, which is necessary for some work in the household, is more complex due to its length.
One of the problems when carrying out this is the accuracy of the markings; to apply it in the center or at another point of the cut edge, marks are placed along the entire length at the same distance from the side wall and then they are connected with a pencil, marker or scriber, using an even corner, construction paper, as a guide. usually a level, a profile from drywall.
Rice. 6 Cutting a pipe lengthwise along a guide angle
In order to cut a metal profile in the longitudinal direction, they drive the angle grinder along the line, gradually cutting a through hole - the method is not very accurate, the tool has to be held suspended without support.
A more convenient way to qualitatively cut a workpiece longitudinally is to use auxiliary supports in the form of a metal corner or even straight plates. To do this, the corner is attached to the surface of the workpiece using clamps and the grinder is guided along its side edge; if the length of the template corner is small, it is unscrewed and moved further to a new place, after which cutting is resumed.
The second way to obtain an even longitudinal cut line is to have a grinder rigidly mounted on a machine or table in a side position. The workpiece being cut is moved along guides, brought to the rotating disk of an angle grinder (the operating principle is reminiscent of an electric tile cutter), the straightness of the resulting line is determined by the rigidity and length of the supporting elements.
Rice. 7 Securing the angle grinder for longitudinal cutting
To obtain the specified sizes and configurations of profile pipes in the household, cutting is used using an angle grinder and inexpensive cutting corundum discs. To get an even and accurate cutting line, it is better to use support guides or homemade steel templates that set the desired angle.
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45 degree cutting
One particular example of such a situation is the need to cut a metal pipe at an angle of 45 degrees.
Such cutting of material is often required when laying water pipes or heating systems. In this case, you have to deal with steel pipes.
For these purposes, conventional cylindrical pipes are usually used. If we are talking about the installation of some kind of metal structures, then profile pipes of rectangular or square cross-section are more often used.
The main problem here is that in order for the elements to be connected to coincide, the cut must be as smooth as possible, which means that especially close attention should be paid to marking the material.
In cases where cutting at an angle is required, a simple square sheet of paper can be used as a marking template. It must be folded strictly diagonally, and then wrapped around the pipe with the template.
In this case, it is necessary to carefully ensure that the side of the sheet, which is located closer to the end of the pipe, is perpendicular to its central axis.
Next, using marking material, a series of dotted lines is applied and after the marking is completed along the entire circumference, the template can be removed.
If you have to cut a profile pipe, then it is advisable to make a special template from the same pipe, but with a larger cross-section. In this case, you will only have to use the measuring devices once.
To apply markings you will need to use a protractor or a construction square. After sawing off the template, the pipes to be cut can simply be inserted into it and marked.
This approach will significantly save work time and cutting a profile pipe at 45 degrees will be convenient.
As for what to use when carrying out work, you should choose the most suitable and familiar one. This can be a simple hacksaw for metal, or a grinder with an installed cutting disc.
90 degree cutting
When the need arises to cut at 90 degrees, the situation is even simpler. In the case of cylindrical elements, you can use the same sheet of paper that is used to wrap the pipe as a template. It is important to ensure that the edge of the sheet is smooth and matches the entire circumference. After marking is applied, the element to be cut is fixed and the cut is made.
Source: https://www.novaso.ru/elektroinstrumenty/kak-rovno-otrezat-profilnuyu-trubu.html
How to cut a pipe at 45 degrees
When carrying out work on the installation of gas or water mains, it often becomes necessary to change the direction of the line, while the pipeline is cut and then welded at the desired angle. Most often, the direction changes by 90 degrees, and the question arises - how to cut the pipe at 45 degrees in order to accurately connect the joints when welding.
You can cope with the problem of cutting edge angles of 45 or 90 degrees if you have the appropriate knowledge and techniques that will help save not only time, but also materials during the work. At other rotation angles, it is impossible to solve the problem using a ruler and a sheet of paper; you will have to call computer technology for help.
Fig. 1 How to cut a pipe at an angle of 45 degrees
45 degree cutting
Typically, in order to rotate a pipe by 45 degrees, fittings and bends with a rotation angle of 45 degrees are used, made of the same material as the pipes themselves; if the pipes are steel, then the turns are welded from steel. For HDPE pipes, there are electric-welded or cast bends at 45 degrees (note that it is almost impossible to find compression fittings with this angle of rotation in Russia).
But, if you still need to cut a round pipe made of steel or various types of plastics, then for this you will need a pattern for cutting pipes at an angle, the shape of which is calculated manually or by machine. The task is greatly simplified if it is necessary to cut a square metal profile at an angle of forty-five degrees.
For quick cutting, you can use a regular sheet of paper folded diagonally to mark the surface for future cutting. When using folded paper, proceed as follows:
- carry out on a straight surface of the profile in the place where the cut is made, strictly perpendicular to the line;
- apply a sheet of paper folded diagonally to the side surface with the sharp end to the line so that the upper edge of the paper triangle is flush with the top side of the metal profile.
Rice. 2 Homemade template for cutting pipes at 45 degrees
- draw a line with a pencil along the side of the sheet at an angle of 45 degrees, after which the paper corner is applied to the other side and traced with a pencil (it is better to use a thin marker).
For sawing, you can use a grinder with a metal disc, first drawing a thin line along the marking, and then gradually deepening it until the edges are completely separated.
When working with an angle grinder, the following factor must be taken into account: if the edges are completely cut, the disk may be damaged by a sharp corner, which will lead to its failure, and in the absence of protection on the angle grinder, even to injury to the worker. Therefore, it is advisable not to cut the corner edges to the end, but to leave a narrow groove and then break them off, subsequently grinding the protrusion.
Making a template for cutting metal profiles
If you need to cut a large number of pipes, you can make a template from a metal profile of a larger diameter using a paper sheet using the above method. The angle of inclination is checked with a protractor or a construction square - in this case, the two edges of the cut parts of the template are connected.
When working, a template is placed on the part to be cut in the right place and pressed tightly, the markings are applied with a sharply sharpened scriber while tracing the template outline. The part is cut in several passes with a gradual deepening of the groove.
Rice. 3 Cutting a metal profile using a miter box
DIY miter box for cutting pipes
Using a template is not very convenient - you have to make a cut along the line, holding the grinder in weight, which leads to large errors. If you have a welding machine, you can make a simple miter box - guides for the grinder disk, preventing it from moving to the side.
To do this, use a previously made template, drill a hole in the side of which and weld a nut. When working, a homemade miter box is placed on the profile, a bolt is screwed into its nut and the device is pressed against the profile surface.
A grinder with a metal disc is used to make a cut, lightly pressing the disc against the side surface of the device. It is clear that with prolonged use, the edges in the miter box are gradually ground down, and although the process occurs simultaneously on all edges, some errors will appear over time.
Therefore, it is better to make the device from hard, wear-resistant metal in order to increase its service life and obtain a more accurate instrument.
Fig.4 Example of making a cut at an angle of 90 degrees
90 degree cutting
To cut a round pipeline or metal profile of rectangular cross-section evenly across, use a sheet of plain paper. They wrap the workpiece so that the edges of the paper sheet coincide, after which it is fixed to the part using tape or glue. Using a grinder, a thin line is drawn near the edge of the paper sheet, after which it is gradually deepened until it is completely cut out.
A metal profile or round pipe can be cut using a template by placing an evenly cut element with a large internal diameter on it.
Collar insert
To obtain branches of metal pipeline lines in the form of tees, a collar insert is used, for which it is necessary to cut the edge of a round pipe adjacent to the walls of another at a right angle. To implement the method proceed as follows:
- cut the edges of the workpiece at right angles using the previously described method.
- On the round end surface, a marker marks four equidistant points located at angles of 90 and 180 degrees to each other.
- The size of the circle is measured, the resulting diameter is divided by 3. The resulting distance is plotted from two diametrically located points, after which these points are connected to two others by a smooth arc, drawing a line with a marker.
Fig.5 Example of a collar section of a pipe
- According to the markings, a cut is made with a grinder and semicircular segments are separated, after which the part is ready for welding. If there are minor inaccuracies in the mating, it can be compacted with a sledgehammer, placing it against the round surface of another element.
Assortment of profile pipes table
Techniques for cutting round pipes at an angle
Round pipes of different diameters are cut at an angle when changing the direction of the pipeline, but it should be taken into account that a straight cut at the desired angle, unlike a rectangular section, will not lead to a tight connection of the edges. Therefore, special patterns are used in which the marked edge has a curved shape, which makes it possible to obtain a high joint density.
Tools used
There are several ways to cut a pipe; for this, construction and industrial tools for metal processing are used. Of all the types, only the grinder allows you to obtain curved surfaces without further processing with the closest arrangement of edges.
For individual use
The following tool is used for cutting steel pipes at home:
Manual pipe cutters. Allows you to cut round parts with an even, right angle of cut due to the cutting edges of the rollers. There are several varieties of products of this type, consisting of single rollers or a series of rollers attached to a chain. In everyday life, such devices are quite rare and are more suitable for professional work.
Source: http://ooo-asteko.ru/kak-razrezat-trubu-pod-45-gradusov/
