How to electric weld a ceiling seam

How to weld a ceiling seam using electric welding

The use of welding joints in the assembly of metal structures is considered the most uncomplicated and reliable method of their installation, not only in industry, but also in everyday life. It is clear that in order to master electric welding techniques, a private owner will need not only to undergo a special training course, but also to acquire certain practical skills.

For those who are at least partially proficient in these welding techniques, we offer an introductory article devoted to the highlights of forming a ceiling seam, the preparation of which requires special attention and accuracy from the performer.

Indeed, when welding a seam, for example, on the ceiling of a garage, the bottom of a car, or any other place, the joint being prepared is located directly above the welder’s head, which explains the requirement for special care in carrying out all work operations.

Therefore, before welding a ceiling seam using electric welding, you need to familiarize yourself with the details of the operations for its formation in certain conditions.

Features of the seam formation technique

The difficulty of preparing ceiling seams is explained by the fact that during welding the molten metal, due to its own weight, can flow down, and this poses a certain threat to the work performer (getting a burn to exposed parts of the body, in particular). This is why skilled experts in similar environments use specific welding techniques to ensure compliance with safety regulations.

To understand all the intricacies of the procedures for preparing ceiling joints, first of all, you should familiarize yourself with the basic requirements for the technique of performing work of a similar class. During welding operations, the following mandatory conditions must be met:

• welding can only be done manually;
• so-called coated electrodes are used to form the connection;
• welding should be carried out in the “small arc” mode using electrodes no more than O 4 mm;
• when preparing a seam, to prevent metal spreading, keep the electrode easily moved to the side;
• the width of the prepared seam should not be more than double the thickness of the electrode;
• to avoid the formation of gases that reduce the quality of the seam, the electrodes used must be completely dry;
• welding must be carried out in the “toward” direction, which allows you to select the optimal rate of progress and monitor the level of quality of the resulting seam;
• To obtain a strong and reliable connection, the edges of the welded surfaces or workpieces are meticulously cleaned before starting work, and upon completion of work, frozen welding residues must be removed from them.

When working with workpieces of greater thickness (about 1 cm or more), welding must be performed in a couple of passes. During the very first pass, an electrode with a diameter of no more than 3 mm is used; all subsequent operations are carried out with an O 4 mm electrode.

We would like to draw your attention to the fact that ceiling joints are not only horizontal, but can also have a certain slope, varying from 10 to 80 degrees (the so-called half-ceiling connection). In this case, both manual and automatic welding using the same coated electrodes can be used to form an inclined seam.

Preparing a butt joint

Before sealing ceiling seams using electric welding, you need to have at least some idea of ​​the types of welded joints, which differ in the method of their formation. Because the length of the article does not allow us to study any of these types, we will limit ourselves to considering the simplest of them, in particular, the so-called “butt” connection.

The specified connection is welded, in most cases, in a couple of passes, implemented in the following sequence:

1. First, the so-called root bead or seam root is formed. When ceiling welding, it is performed using an O 3 mm electrode, which is guided along the seam using a well-known method called “ladder”. The amount of current set on the welding machine is also selected in the range between the minimum and average values ​​(we are talking about the values ​​inherent in the technical features of the unit itself).
2. The second and third passes are performed with Ø 3×4 mm electrodes. The current strength is also selected to be medium or closer to high. In order to prevent the formation of “humpbacks”, welding is carried out with a delay at the edges of the bead with a passage along the edge of the workpiece and the upcoming transition to the next edge using the “ladder” method.
3. All subsequent layers of the bead are formed in the form of surfacing (without any deviations from the welding line).
4. The front layer of the ceiling joint being formed should look so that the width of the unfilled groove does not exceed 0.5–2 mm. If necessary, this layer can also be made in a couple of passes.

If all the above requirements are met, you will be able to get a high-quality and reliable connection. The order of its formation can be studied in more detail in the video attached to the materials of this article.

Welding safety

The safety requirements for welding when making a ceiling seam are as follows:

• All work must be carried out in a well-dried room, the air humidity in which should not exceed the value mentioned in the standards.
• Welding work is not allowed in open spaces during snowfall or thunderstorms.
• Welding work should be carried out only in clothing intended for these purposes with a special protective coating and a mask.
• During work, unused equipment must be disconnected from the power supply.
• For welding, only well-insulated wires should be used.

This video demonstrates the process of welding a ceiling seam. Even though the comments are in English, what is shown on the screen does not lack additional explanation:

Source: https://blog-oremonte.ru/nuzhnoe/kak-varit-potolochnyi-shov-elektrosvarkoi.html

How to properly weld a ceiling seam using electric welding (electrode, inverter)

One of the most inconvenient and difficult positions for welding is the ceiling. But it is worth mastering this type of connection due to the automatic increase in the class of a welder who has learned to make high-quality seams in such a spatial position.

This is in demand at enterprises whose activities involve laying pipelines and at construction sites. This skill is also useful in everyday life, when welding heating or gazebos. Some elements of a metal garage cannot be assembled without welding joints at the top.

How to weld a ceiling seam using electric welding? What are the main precautions and optimal device settings?

Common Difficulties

Many welders do not like ceiling seams because of the difficulties in their execution. A beginner’s results can often be poor, which discourages them from learning. But if you understand the main problems and prevent them as much as possible, then pretty soon, after training, you can master this difficult connection.

Welding a ceiling seam with an inverter or transformer is significantly different from working on a similar product in the lower position. When metal is welded on the floor, the weld pool spreads over the joint, and the welder only needs to ensure that the joint is properly filled, preventing slag from getting in front of the pool. When the ceiling serves as the working surface, the molten metal tends downward under its own weight.

The slag, being in a liquid state, also constantly drips, which interferes with the welding. These splashes hitting the ground scatter even more, hitting the welder and surrounding objects. The main difficulty when arc welding in the ceiling position of the seam is connecting the sides of the product. A weld pool forms on one edge, but there is no way to bond both sides with metal.

Welding of ceiling seams is performed at a reduced current, which leads to frequent sticking of the electrode and lack of penetration. Another defect is sagging. The body position with the head thrown back and the arm raised up quickly tires the welder. Therefore, frequent breaks are simply necessary for quality work. Understanding these complexities will help you tune in to the challenges and take steps to make the process easier to implement.

Ceiling welding technology

To understand how to properly perform this type of connection, you need to know the basic rules used by experienced welders. Additionally, you can see how to weld a ceiling seam using electric welding in the video. Here are the main points:

• The sides to be welded should be brought together as much as possible. Welding with gaps on the ceiling is only available to experienced specialists, so the more closely the parts are connected, the easier it will be to apply a seam.
• Edge cutting is carried out as in the lower position. When the thickness of the sides is more than 5 mm, a V-shaped bevel is made.
• The electrode is brought to the ceiling at an angle of 45 degrees relative to the upper plane. Beginner welders can try welding with half of the electrode, as this will allow better control of its tip and control the formation of the seam.
• The welding process and the seam itself in this spatial position are possible due to the surface tension of the metal. To prevent drops of molten iron from flying off before they catch on the edge, the current should be reduced.
• If the sides are brought close together, then the first seam on even plates can be made without oscillatory movements. This will fill the joint well. The second pass is made wider to strengthen the ligament. But on pipes it is better to immediately weld with a wide seam.
• Electrode welding can be performed in several ways: crescent, horizontal figure eight, or spiral. When there is a small gap, an intermittent arc is used to allow the deposited drop of metal to cool. After a moment, without allowing the red color to pass through (this can be seen through the mask), the next drop is applied. This is a long process, so the welder does not need to rush and needs to rest periodically.
• Do not be intimidated by the appearance of the connection after the work is completed. Slag can flow down several tiers. But after beating it off, a high seam should remain. Sagging and large rollers are not critical.

Devices and electrodes

Ceiling seams can be made using an inverter or a conventional transformer. It is important to correctly set the current strength, which is 25% lower than when welding on the floor. For example, for plates 5 mm thick, 100A is sufficient. It will be easier to work if the cable is not heavy. This will make it easier to control the end of the electrode and your hand will get less tired. You can also loop the cable around your hand to reduce the strain on your wrist.

Electrodes for ceiling welding are suitable with a diameter of 3 and 4 mm. It is important to dry them well to reduce the amount of splashing. If beginners use short electrodes, this will allow them to manipulate the arc more confidently.

Precautionary measures

For ceiling seams, you should wear a thick jacket and trousers. Gloves must cover the cuffs, otherwise scale will reach the elbows and burn the skin. A hat or cap without a visor is required on the head. It is important to choose trousers of such length that they cover the collar of the shoe to prevent molten particles from getting inside.

Since the spray hits the ground and spreads further, there should be no flammable objects nearby. You need to use safety glasses to beat off the slag, because it will fall down on the welder. Frequent rest will allow you to relieve stress from the muscles of your neck and arms and get the job done efficiently.

Welding in the ceiling position is not mastered immediately. It takes practice and patience. It’s good to take a few minutes a day and weld two pieces of pipe or corner to the table and try to weld them from below. Having mastered this method, you can safely weld pipes and metal structures of any complexity.

Source: https://svarkalegko.com/tehonology/potolochnyj-shov.html

How to weld a ceiling seam. General safety recommendations. Welding technology. Seam root, groove filling and face layer

Welding ceiling seams

The ceiling weld is the most difficult type of welding because the weld pool is upside down. If you do not perform special actions, leaks of hot metal may occur during this procedure.

It is also important to observe safety precautions when performing this seam, because any drop can get into your face, ears, neck or shoes. In the video you will find answers to some questions.

In industrial production, this welding method is almost eliminated due to changes in the position of the parts. However, any welder must be able to weld a ceiling . Overhead welding is often used in construction and installation work and pipeline construction, as well as in shipbuilding.

General safety recommendations

• Eliminate any possibility of electric shock when welding. The wires must be insulated. When not in use, turn off the welding machine.
• Do not work in rain or snow. Welding in wet areas requires a lot of experience.
• Wear protective clothing to protect your eyes and body surfaces. Be sure to have a welding mask and goggles (for removing slag). The surface of the body should be completely covered with thick, tucked-in clothing .
• Observe explosion and fire safety.

Ceiling seam welding technology

For novice welders, it will be useful to familiarize yourself with a general video lesson on manual arc welding:

General recommendations

Ceiling weld

https://www.youtube.com/watch?v=RVB8SXSSz_E

During welding, the molten metal is held from falling by surface tension. That is why it is necessary to reduce the size of the weld pool as much as possible. To do this, you need to periodically move the electrode to the side so that the metal has time to harden slightly.

In addition, the width of the rollers is reduced. As a rule, it is 2-3 electrode widths. Typically, electrodes with a diameter of no more than 4 mm are used for the welding seam . When the archwire is removed, undercuts sometimes form. Hold the electrode on the edges to avoid this.

The electrode must be dry, otherwise the gases released may enter the weld, reducing its quality. When welding using this technique, the evaporation of slag and gases from the molten metal is reduced. Therefore, welding seams in the ceiling have lower metal properties than when welding in other positions .

It is recommended to carry out welding on the ceiling yourself; this will allow you to clearly observe the process and select the speed and method of welding. Materials with a thickness above 8 mm are welded in several passes. The root seam is usually performed with a 3 mm electrode, and subsequent ones - with 4 mm.

It is important to know! Before welding, the ends to be joined must be processed and chamfered in accordance with GOST 10948-64. After each roller, the slag layer should be carefully removed. Welding tolerances for connections are described in GOST 5264-80.

Methods for welding ceiling seams

• Crescent - the electrode should be at an angle of 90-130° to the ceiling. With oscillatory movements in the shape of a crescent (zigzags), the electrode continuously touches the hardened part of the metal. This method requires several passes and is the easiest for beginners.

Crescent welding method

• Ladder - the electrode is at an angle of 90-130° to the ceiling. It is brought to the ceiling and an arc is lit. When molten metal is formed, the electrode is withdrawn a little (5-10 millimeters) and returned back, covering the dried metal by 30-50% of its length .

Ladder welding

Back-and-forth - the end of the electrode constantly moves back towards the hardened part of the metal, thus constantly lengthening the weld. This is the most difficult and time-consuming method, but at the same time it is the most durable.

Reciprocating method

Welding in ceiling position

Welding occurs in several stages, the first of which is welding the root of the weld.

Root of seam

Use an electrode with a diameter of 3 mm and an amperage of the minimum or medium range.

Depending on the conditions, welding can be performed in several ways:

1. If sampling and welding from the reverse side is possible, then during welding you should pay attention to the formation of a bead on the lower side. There should be no overhangs or undercuts.

It is best to make such a seam with oscillatory movements from edge to edge, with a delay there. Thus, no additional sampling will be required, and after cleaning the joint from welding, it will be possible to apply a second bead (read more Plastic ceilings: installation features).

Ceiling welding seam

1. If there is a need to form a roller on the reverse side, you need to make constant translational movements of the electrode into the gap using a minimally short arc. Make sure that the arc burns from the reverse side, then the metal will solidify in the shape of an umbrella (read more Baikal ceiling slab).

The main focus of this type of welding should be on the back bead. If possible, match the welding speed to the bottom bead to avoid excessive bulge. If, after all, the inner roller turns out to be too protruding, then sampling to bare metal is necessary .

The root of the seam from the reverse side

Filling the cut

Welding of beads 2 and 3 occurs with a 3 mm electrode. at average-maximum current, or 4 mm. on average. The choice depends on the width of the first roller. To avoid the formation of a bulge, you should linger at the edges, then slightly shift the arc along the edge and move along the ladder to the other edge.

If you need to change the shape of the welding bead, change the speed, tilt the electrode at a different angle, increase the step size.

Influence of the angle of inclination of the electrode on the shape of the seam

Advice! Do not make rollers too wide; they will cause smudges and drip.

The 4th and 5th layers depend on the width of the previous rollers - full width, or 2 rollers. The following layers are performed in the form of surfacing without oscillatory movements . When approaching the edge, you need to leave a distance the diameter of the coated electrode between the penultimate roller and the edge.

How to weld a ceiling seam correctly - diagram

Facial layer

The front layer is boiled into a depression of 0.5-2 mm.

Depending on the thickness of the metal and the width of the final layer, several passes may be required.

When welding in 1 pass and deepening the penultimate layer by 0.5-1 mm. It is necessary to weld using the “forward arc” method. Select the pitch depending on the formation of the roller.

If the depression is from 1 to 2 mm, use the “ladder” method.

When welding in several passes, the side beads passing at the edge are welded in different ways in each case: with or without manipulation, a ladder or an arc forward. The last roll in the center is cooked so as to evenly connect the 2 side ones .

A detailed diagram is shown in the picture above.

In conclusion, it is worth adding that you should not weld ceilings without experience. This is a rather difficult matter, requiring certain knowledge and skills that come with time. Start welding with simpler types of joints.

Source: https://potolokspec.ru/remont-i-operacii/izolyaciya/kak-varit-potolochnyj-shov-810

Welding ceiling seams: technique, features, safety precautions

The ceiling seam is considered one of the most difficult welding joints. The reason is that when welding this joint, the weld pool is located upside down. Such processing of parts requires skill and precise adherence to technology.

The sequence of actions and rules for creating a ceiling seam should not be violated during work. Because this will not only deteriorate the quality of the connection, but also create a risk of injury from hot metal drops.

When creating a ceiling connection, you must adhere to safety regulations and also use protective equipment, especially around the hands and face.

Features of the technology

Preparation before forming a ceiling seam is somewhat different from preparation before conventional welding. There are certain difficulties and dangers in the welding process, for example, contact of molten metal with the skin. Metal can flow and drip.

You need to know how to prevent this. Welders who work with ceiling joints know a few tricks to help avoid complications and injuries.

Before starting work, you need to study all the technical requirements for the process. There are a number of conditions that must be met. Knowing these terms is especially important for beginners.

So. As with any other welding, the edges of the parts must be cleaned before processing. Cleaning stains, burrs and degreasing should never be ignored.

The formation of the ceiling seam should be carried out using semi-automatic equipment or an RDS apparatus. Type of electrodes: coated.

This will have a beneficial effect on the quality of the canvas. The diameter of the electrode should not exceed four millimeters, and it should be narrower than the width of the connection.

It is also necessary to ensure that the electrode is dry. Their coating may burst at high humidity, impairing conductivity and, as a consequence, the quality of the connection.

Arc length is short. This is important when welding ceiling seams, so you should try not to go to the average value.

If welding occurs in the RDS mode, then the spreading of the metal can be prevented by moving the electrode slightly to the side.

The formation of the ceiling connection occurs using the “pull-on” technology. This helps create the required pace of work while maintaining the quality of the connection.

If you need to weld parts whose thickness exceeds one centimeter, welding occurs in stages. First, an electrode with a diameter of no more than three millimeters is used. Next, a four-millimeter model is taken.

The ceiling seam is work not only in the horizontal plane. The definition of this term also includes seams with a slope of 10-80 degrees.

In such cases, it is also possible to use manual or semi-automatic equipment, as well as welding with coated electrodes.

Tips for beginners

The main feature of this type of joint is the inverted weld pool. The molten metal is held by tension, so maintaining the required bath dimensions is very important.

When welding, it is worth moving the edge of the electrode slightly to the side from time to time. This will allow the metal to cool a little and harden.

This technique will protect against drips and protect the canvas from cracks.

Welding methods

There are three main methods of welding a ceiling seam: half-moon, ladder and “reverse-forward”.

When forming a seam using the first method, the electrode is positioned at an angle to the surface of the part. The angle ranges from 90 to 140 degrees arc. Thanks to such movements, the working element moves from one edge of the joint to the other.

With the second method, the placement of the electrode is similar to a crescent. However, the movement occurs differently: the consumable element is removed from the molten metal to the side, returns, and is withdrawn again.

Welding using the third method occurs when, throughout the entire work process, the electrode returns a certain distance back to the frozen metal.

If a beginner is welding, it is better to use the crescent method. It's more simple. The ladder and back-and-forth method require more skill and time.

Yes, they create a better-quality connection, but not everyone can cope with welding using such techniques.

Work process

Preparation always comes first. The working area is cleaned with a metal brush or grinder, and the metal surface is degreased.

Using a model electrode of three millimeters, the root of the seam is formed. It looks like a roller created from molten metal. If it is necessary to create a bead on the other side of the part, a gap is left at the joint.

Using point throws, the electrode is placed inside this gap. It is important here to ensure that the arc burns stably. After formation, the root must be cleaned of toxins and its convexity adjusted.

Next, the process of creating a connection occurs with electrodes with a diameter of about four millimeters.

Safety Tips

Safety is the main part of any job. Welding a ceiling seam requires full compliance, because it is a rather dangerous activity. When starting to weld such a joint, you need to remember several rules.

The welder must wear a special work suit. His face must be covered with a mask, his eyes must be protected with goggles, and his hands must be protected with gloves. No bare skin is allowed.

Welding is carried out only in a dry space with an optimal temperature. Work should not be carried out in bad weather, high air humidity, gusts of wind or drafts.

Only sufficiently qualified craftsmen can work in extreme conditions.

If the welding process is suspended, you need to turn off the equipment and isolate the wires from accidental influences.

Conclusion

Forming a ceiling seam requires an investment of effort, time and energy. It is virtually impossible for a beginner to complete it right away.

To gain access to such work requires an increased level of knowledge, ownership of equipment and study of all the details of creating a ceiling connection.

It takes preparation and training. It is better not to take on such a task without sufficient knowledge and skills. But every welder performing such a weld must in any case follow the rules and safety precautions.

This is necessary to maintain your own health.

Source: https://prosvarku.info/tehnika-svarki/svarka-potolochnyh-shvov

How to weld a ceiling seam correctly using electric welding

RUSENUKR

In order to answer the question of how to weld a ceiling seam using electric welding, you need to have an idea of ​​what a ceiling seam is, its features and welding methods.

Ceiling seam welding diagram.

Next, you can get all the necessary information on how to perform this type of work.

Some characteristics

The ceiling seam is the most difficult to perform.

It's easy to explain. Indeed, during the welding process, metal that has reached its melting temperature may leak.

An experienced welding master must have the skills to weld this type of seam.

It is rarely used in industrial applications. But when it comes to the repair and installation of pipelines or shipbuilding, this type of seam is in great demand there.

It is necessary to observe safety precautions when working with molten metal. They can burn exposed areas of the body, such as the face or hands.

Applying a ceiling seam using welding has a number of features:

Types of welded joints: a, b - butt, c - butt flange, d - lap, d - corner, f - T, g - slotted, h - end, i - lap with penetration.

• the weld pool should be of the smallest size;
• when a seam is applied, the metal is held on the ceiling due to the force of attraction relative to the surface;
• to avoid metal spreading, the seam is placed in such a way that the electrode is moved to the side;
• electrode size is about 0.4 cm;
• the rollers produced must be 2 times smaller than the electrode;
• the electrodes must be dry to avoid the release of gases that damage the seams;
• you should cook in your direction, thanks to this you can choose the optimal pace of work, and this will allow you to track the process down to the smallest detail;
• To give the seam the greatest strength, all edges of the parts should be carefully processed and dirt should be removed from the welded beads.

To weld parts about 1 cm thick, the work is performed in several stages:

1. An electrode with a diameter of 0.3 cm is used.
2. Subsequent welding is performed with a 0.4 cm electrode.

Workflow Options

There are several types of ceiling seam welding.

Electric arc welding: a – Bernados method; b – Slavyanov method; c – method of starting an arc from the outside; 1 – electrodes; 2 – arc; 3 – electromagnet; 4.5 – filler rod.

1. Crescent welding. The electrode is located at an angle of over 90 degrees to the ceiling. The maximum tilt level is 130 degrees. A professional performing this type of work makes zigzag movements. They also resemble the image of a crescent moon. This method is carried out in several approaches. It's quite light. Even a non-professional can handle it. The main thing is to constantly monitor the welding speed, otherwise you can ruin the seam. To avoid metal leakage, do not weld rollers with a large width.
2. Reciprocating. This type of welding is also not performed in one approach. First, the root seam is welded using a 0.3 cm electrode; the current supply level should not be higher than average.
3. Ladder. The electrode is located at an angle of over 90 degrees to the ceiling. The maximum tilt level is 130 degrees. This method differs from others in that the electrode should be moved to the side to avoid spreading of the molten metal. When it hardens, the electrode is returned to its place and welding continues. With this method, the seam becomes longer. Despite the difficulty and complexity of execution, the final result of the work is the highest in terms of strength and reliability.

Features of the ceiling seam welding process

Ceiling seams are divided into:

Classification of welds: a – by location relative to the acting force, b – by position in space, c – by reinforcement, d – by width, e – by the number of layers, f – by length.

• turning into vertical;
• solid;
• lower ones.

Safety precautions when welding ceiling seams:

• work must be carried out in a dry room or in a closed space. It is not allowed to perform welding work outdoors during a thunderstorm or snowfall;
• You should wear specialized clothing with an outer protective covering on your body;
• use a mask;
• disconnect unused equipment from the power supply;
• Carry out wire insulation work.

How to buy the “right” equipment

For those who dream of becoming a professional in the field of welding, purchasing professional equipment is an important and integral step. The modern welding machine market offers potential buyers a large selection of equipment. You can assemble it yourself. But there are items that should be purchased anyway:

1. Transformer. This device converts household-type current into the one required by the device to operate. When buying a transformer, you should not save money, as they quickly fail and are quite heavy.
2. Inverter. This device also converts current from household to electrical. But it has excellent technical properties and increased productivity.

A rectifier is also used. Unlike a transformer, this device guarantees a more stable supply of converted electricity, which affects the quality of the seam created.

In order to answer the question of how to brew ceiling electric welding seam, you must have an idea of ​​what the ceiling seam, its features and ways of cooking.

Driving ceiling welding seam.

Then you can get all the necessary information on how to perform this type of work.

Some characteristics

Ceiling seam is the most difficult to perform.

It is easy to explain. Indeed, during the welding process the metal has reached the melting point, can leak.

Source: https://stroystory.ru/kovka/process/6656-kak-varit-pravilno-potolochnyj-shov.html

Ceiling welding: performance features, seams, technology

Among the existing types of seam locations, the ceiling welding seam occupies a special position. This attention to it is explained primarily by the uncomfortable position of the welder during this process. Useful tips on how to solve this and other problems are of interest not only to those mastering this difficult work, but also to professionals.

Ceiling welding is a kind of exam. A welder who has mastered this method automatically improves his skills and becomes more in demand. The area where you have to resort to ceiling welding can be the laying of pipelines, construction sites, and strengthening the gazebo at your summer cottage.

Execution Features

When welding a ceiling seam, drops of molten metal tend to fall down under the force of gravity. Part of what keeps them from falling is surface tension. When welding a horizontal seam at the bottom, this problem does not exist. In this case, the weld pool spreads along the joint. The welder's task is quite simple - to ensure that slag does not fall in front of the bath. A different picture is observed when ceiling welding occurs at the top.

The weld pool is formed only on one edge. Proper welding of a seam is hindered not only by splashes and drops of hot metal, but also by the flow of slag, which is in a liquid state.

A welder with his head thrown up and his hand with an electrode raised quickly gets tired, which does not contribute to the quality of the work performed. Therefore, frequent breaks become a production necessity.

Equipment

Ceiling seams are welded using a conventional transformer or inverter. The difference between the inverter, which gives it an advantage, is the presence of a stabilizer, a low and high frequency rectifier, a control unit, a working shunt, and a current sensor. Using an electronic regulator, it is possible to regulate the current strength over a wide range. The presence of double insulation is protection against electric shock. The advantage is the compactness of the device and its light weight.

There are three types of welding inverters:

1. Household . Used for metals with a thickness of no more than 3 mm.
2. Semi-professional . Products with a thickness not exceeding 6 mm are welded. Has increased power. Requires short breaks to cool down.
3. Professional . Can work without a break for 6-8 hours.

Electrodes are selected depending on the material being welded. Welding a ceiling seam with electrodes assumes their diameter is 3-4 mm. To reduce the amount of spatter, they should be well dried before welding.

Recommendations

When welding, the ceiling seam will turn out to be of better quality if you follow techniques proven by time and practice:

• when working, use a short arc, which will increase accuracy;
• hold the electrodes, moving them slightly to the side, to reduce metal spreading;
• the width of the weld should not exceed the diameter of the electrode;
• lead the seam to “yourself”, which will make it possible to control it;
• choose a comfortable pace of work.

Using these recommendations will simplify the process and improve the quality of the seam.

Technology

Welding ceiling seams involves the use of various techniques. For all methods, the following general requirements must be met:

1. If the thickness of the part being welded exceeds 5 mm, then a bevel is formed in the shape of the letter “V”.
2. Before starting the welding process, the parts should be pressed together as tightly as possible, with minimal gap. If this requirement is met, the first pass can be formed without performing oscillatory movements with the electrode.
3. When bringing the electrode to the welding site, maintain an angle of 45 degrees.
4. Beginners can use electrode halves to improve accuracy.
5. Working with intermittent short arcs will allow the molten drops to cool quickly. As a result, they will not fall down, but will firmly adhere to the junction.

Following the requirements of how to arc weld a ceiling seam will ensure its strength and good appearance of the weld.

Crescent

This method is the least complicated and can be used as ceiling welding for beginners.

The position of the electrode relative to the top surface is 90-130 degrees. The method got its name due to the fact that the welder makes movements reminiscent of a crescent moon. Since this method requires forming a seam in several passes, it takes quite a lot of time. To avoid smudges, do not make the rollers too wide. It is necessary to constantly monitor the speed of the process. The advantages are simplicity and high accuracy.

Reciprocating

The method involves welding the seam in several passes.

First, the root seam is performed using an electrode with a diameter of 3 mm. The current should not be too high.

Ladder

As with the crescent method, the position of the electrode relative to the upper surface is an angle of 90-130°C.

The ladder method is convenient when making a long weld. feature - periodic removal of the electrode to the side to solidify the metal, which prevents it from spreading.

Semi-automatic welding

When making a ceiling seam, semi-automatic welding is used. The method is common for welding metals of various thicknesses. For this method, a semi-automatic welding machine is used. Welding occurs by feeding copper or aluminum wire. The use of the method speeds up the welding process and reduces energy consumption. The seam is of high quality.

Safety

Since when welding a seam located at the top, there is a danger of hot drops falling on the performer, his protection becomes of particular importance. The welder's suit is made of dense fire-resistant material. The mittens should overlap the edges of the sleeves. The head and face are protected by a mask. There should be no flammable materials or objects near the work.

Interesting video

Source: https://osvarka.com/shvy-i-soedineniya/svarka-potolochnykh-shvov

How to properly weld a ceiling seam using electric welding? Different working methods!

The question of how to weld a ceiling seam interests even many professionals in the field of welding, let alone beginners.

The main problem lies in the spatial position itself. The welder has to work in an uncomfortable position, with his arms raised, and this causes rapid fatigue. There is a risk of melt dripping, which can lead not only to burns due to splashing, but also to the formation of a poor-quality seam.

To get a good result, you need to approach this work with the appropriate knowledge and skills.

Equipment used

The work can be carried out either by an inverter or a conventional transformer. Regardless of the device chosen, the current should be reduced slightly; its value should be about a quarter lower than for similar work performed on the floor.

For example, a reliable connection of 5 mm wafers can be achieved by setting the current to 100 Amps.

The optimal diameter of the electrodes is 3-4 millimeters, no more.

Before starting work, they are thoroughly dried. This minimizes splashing and also eliminates the release of gas. The edges of the parts to be welded are cleaned.

Safety precautions

Welding in the ceiling position is hard work, during which safety precautions must be observed. They look like this:

1. Clothes - thick overalls, gloves with long cuffs that will not let scale get under the sleeves. The head should be covered with a thick hat. The length of the trousers should be with a certain margin, since drops of molten metal, hitting the floor, splash and can fall on the legs.
2. All flammable objects and liquids should be removed from the work area.
3. When beating off slag, you need to wear glasses to prevent small particles of metal from getting into your eyes.
4. All wires are insulated; if work stops, the welding machine is de-energized.

During work, you should take breaks to relieve stress from the muscles of your neck and arms.

Important! It should be noted that if welding is planned in a room with a high level of humidity, it is better for beginners not to undertake it. This is dangerous and difficult even for professionals with extensive experience.

Secrets of work

Welding a ceiling seam with electrodes is carried out using some “techniques” that simplify the process and improve the quality of the finished result:

• It is better to work with a short arc, this increases accuracy;
• It is better to hold the electrodes with a slight deviation to the side, this reduces the likelihood of spreading of the deposited metal;
• the width of the seam should not be greater than the diameter of the electrode used;
• the seam is made “towards oneself”. This approach makes it possible to control its quality and condition, as well as choose the most comfortable working pace.

Working methods

Arc welding can be performed using the following techniques:

1. Crescent. The initial position of the electrode relative to the ceiling plane is in the range from 90 to 130 degrees. When moving, the master seems to describe crescent moons with elements.

Practice shows that this method is optimal for novice welders.

Yes, the time required here is quite high, which is explained by the need to form a seam in several passes, but the accuracy is as high as possible and there are no difficulties. It is enough for a specialist to ensure that:

• the welding speed was not too high;
• do not form beads of great thickness, which provoke spreading of the deposited metal.

2. Reciprocating technique. Here you also have to prepare for the fact that the work will be monotonous and slow; you will have to go over the seam several times.

First, the main, root seam is formed, for which an electrode 3 millimeters thick is used. The current strength when forming the root weld is set to the average value.

3. Ladder. As in the first case, the initial position of the electrode relative to the base lies in the range from 90 to 130 degrees.

During operation, the element is moved to the side, which eliminates the possibility of melt spreading. The welder waits until the metal cools down and then continues the process. If you need to get a long weld, then this method is the best option.

Rules and requirements

The following rules, recommendations and standards will help you understand how to properly weld a ceiling seam using electric welding:

1. Before starting work, you need to bring the parts to be welded together as tightly as possible. The smaller the gap, the easier it is to get a high-quality and durable seam. Practice shows that it is almost impossible for a beginner to cope with a large gap; experience is needed here.
2. The edges need to be cut. If the thickness of the metal part being welded is more than 5 millimeters, you need to form a V-shaped bevel.
3. When bringing the electrode to the working plane, you must maintain an angle of 45 degrees. Beginners can be advised to use short half electrodes to increase the accuracy of manipulations.
4. If the planes are initially tightly fitted to each other, the gap is minimal, then the first seam is formed almost without oscillating movements of the electrode. This approach allows you to fully fill the gap with fusion. The next seam is made with an increased width, which increases the overall structural strength.
5. It is better to work with short intermittent arcs. This allows drops of deposited metal to quickly cool and adhere firmly to the base. This approach, firstly, ensures greater aesthetics and strength of the seam, and, secondly, it minimizes dangerous spattering.

Source: https://plavitmetall.ru/svarka/kak-varit-potolochnyj-shov.html

We cook the ceiling seam with an inverter

Ceiling welding is considered one of the most difficult connections. This can be explained by the fact that the weld pool is inverted during operation, as a result of which there is a huge probability of leakage of molten metal. How to weld a ceiling seam correctly? When connecting ceiling structures, it is necessary to especially observe the safety rules for performing welding work, since the possibility of hot metal getting on the welder’s hands and face cannot be ruled out.

Any welding professional must know and be able to correctly perform seam joints of this type. If in ordinary production such a technique is used quite rarely due to the ability to turn over the structure being welded, then in the shipbuilding industry during installation work, when connecting pipeline communications, this technology is often used.

Crescent

When using this technology, the electrode relative to the ceiling is held by the welder at an angle of more than 90 degrees, while the maximum angle should not exceed 130 degrees.

In this case, professional welders perform zigzag movements with the electrode that resemble a crescent.

Welding with an inverter using this technology involves performing work in several approaches, but it is considered quite simple.

This technique can be used even by a young, inexperienced welder.

Reciprocating

This technique for welding seams on the ceiling also involves several passes with an electrode. The root weld is first made with an electrode, the cross-sectional diameter of which is 3 mm, and the current supply should not exceed the average value.

The location of the electrode to the ceiling base is more than 90 degrees, with no more than 130 degrees. The main difference of the technology is the removal of the electrode to the side during welding in order to prevent the metal from spreading. After it cools down, the electrode is returned back to the seam and welding work is resumed. When using this technique, the suture joints are longer.

Welding a ceiling seam is considered quite complex and time-consuming, but the result is worth it - in terms of reliability and strength, such seams have the highest rates.

Rules for making welded ceiling joints

1. The pre-welded sides are brought together as tightly as possible. If there are significant gaps, only a sufficiently experienced welder will be able to perform welding work efficiently.
2. Next, the edges are cut, just as in the bottom position. If the metal thickness is more than 0.5 cm, then a V-shaped bevel is performed.
3. It is recommended to bring the electrode to the ceiling plane at an angle of 45 degrees.

   Young, inexperienced welders are recommended to start welding with half of the electrode, so that during the work they can better control its tip, and this will make it easier to form the welded joint itself.

4. The welding procedure can be performed in this spatial position due to the tension of the metal plane. In order to prevent drops of hot iron from flying off without having time to adhere to the edge, it is recommended to reduce the current strength.

5. If the welded sides are brought together sufficiently tightly, the first seam can be made without oscillating movements of the electrode. This will make it possible to completely fill the joint with molten metal. The next pass needs to be made a little wider to strengthen the ligament. On pipes, of course, it is recommended to immediately make a wide seam.
6. If there is a small gap between the metal plates being connected, an intermittent arc is used, which allows the deposited metal drop to cool. Instantly, without allowing the redness of the previous drop to go away, the next drop is applied.

How to properly weld a ceiling seam

Sometimes when repairing and installing metal structures, it is necessary to use a welding machine. It’s good if such manipulations can be carried out separately in a convenient position, and then the finished part can be attached. Sometimes you have to act immediately and in rather extreme conditions, for example, when welding ceiling seams. In such cases, it is important to know safety precautions and basic rules for working with electric welding.

Working with electric welding and safety precautions

A ceiling seam is one of the most difficult types of welding, due to the inconvenient position of the parts. It is almost never used in industry, but in shipbuilding, construction, installation and pipeline work it is very popular. In everyday life, performing such a welding seam is useful during construction, repairs, and installation of metal products in the garage and in the country.

The ceiling seam is the most inconvenient for the welder

Welding ceiling seams requires care and good skills in working with a welding machine. It will be important to take care of safety precautions.

1. Make sure all tools are in good working order and wires are insulated. Unplug devices after use.
2. Protect your skin, eyes and respiratory system from slag, dust and hot metal. Use protective clothing, a mask and goggles.
3. Do not work in poorly ventilated areas with high humidity, or outdoors in rain, snow, etc.
4. Observe fire and explosion safety.

Proper equipment for welding work is the key to your safety

Not every specialist can boast of an impeccable technique for welding a ceiling seam. Study the relevant literature, tips and be sure to practice before starting work.

A distinctive feature of this type of welding is that the weld pool is in an inverted position, and the hot metal is held by the force of surface tension. Therefore, it is necessary to maintain a minimum size of the bath and periodically move the electrode to the side, holding it slightly at the edges so that the metal cools and sets and cracks do not form. Welding should be done by yourself in order to clearly see and control the process.

Electrodes with a diameter of 3-4 mm are suitable for use. They must be dry so that gases do not enter the metal and reduce the quality of the seam. The current strength is selected empirically from minimum to average.

Welding methods

Welding ceiling seams can be done in several ways.

• Crescent. The electrode is located at an angle of 90-130 degrees to the surface and moves in an arc with oscillatory movements from edge to edge.
• Ladder. The electrode location is similar. It is taken away from the hot metal and returned back, covering the hardened surface by half.
• Back-and-forth method. The electrode should be constantly returned to the frozen seam as it progresses.

Welding methods: I – crescent, II – ladder, III – reciprocating

The first method is the simplest and is suitable for use by novice welders. The remaining options are more labor-intensive, but provide the strongest connection.

Stages of work execution

First of all, the surface to be welded must be prepared and the edges at the junction must be carefully processed. To clean them, use a grinder or a metal brush. Then they begin to weld the root of the weld with an electrode of a smaller diameter (3 mm).

They form a roller of molten metal, performing oscillatory movements from edge to edge. If it is necessary for it to form on the reverse side, the electrode is placed inside the gap with short jerks.

It is important to ensure that the arc burns evenly, then the metal will be fused in the shape of a fountain.

The resulting roller must be freed from slag. And if it turns out to be too convex, it is necessary to sample it to bare metal. Then the manipulations are repeated, forming rollers on top. To apply 4-5 and subsequent layers, you can use an electrode of a larger diameter (4).

Welding joints of ceiling seams by surfacing and connecting rollers

The thicker the source material, the more layers and approaches you will need. For a quality connection, monitor the speed of the electrode so that the metal has time to melt well. If necessary, change its angle of inclination and step size.

Welding ceiling seams is a rather difficult process. If you do not have enough knowledge or experience, you should not overestimate your capabilities; in this case, it is better to trust the professionals.

welding ceiling seams

http://www..com/watch?v=JWYvM-EdxG0

Source: http://toppotolok.su/raboty/remont/svarka-potolochnyx-shvov.html

How to weld a ceiling seam

Ceiling welding is considered one of the most difficult types of welding because the weld pool is located upside down. Welding ceiling seams requires a precise sequence of all actions. If you do not follow the rules and recommendations, you can get a poor-quality connection, which can lead to leaks of hot metal.

When making a ceiling seam, you need to follow safety precautions and protect your face and hands from possible contact with hot drops of metal.

Features of the ceiling seam technique

Note! Preparatory work before welding ceiling seams is accompanied by a number of difficulties. This is due to the fact that during the welding process, molten metal can flow down and accidentally fall on the skin of the person performing the weld. That is why experienced specialists, knowing how to weld such a seam, use special welding techniques that ensure strict compliance with safety rules.

Before connecting ceiling seams, you must clearly understand all the requirements and not neglect to fulfill the mandatory conditions. This information is especially important for novice welders.

• To connect ceiling seams, semi-automatic or manual welding should be used.
• To achieve a strong and high-quality connection, coated electrodes are used.
• Welding the ceiling joint is carried out in short arc mode; the electrodes you use should be no more than 4 mm.
• Arc welding involves carrying out preparatory work: to prevent the metal used from spreading, the electrode must be held slightly to the side.
• The width of the seam should be less than the thickness of the electrode.
• During the welding process, gases can be generated that have a negative impact on the quality of the seam. To prevent this from happening, the electrodes must be completely dry.
• Welding the ceiling seam should be done in the “toward” direction. This way you can choose the appropriate pace of progress and monitor the quality of the seam.
• In order to ultimately obtain the most durable and reliable connection, the edges of the workpieces must be well cleaned before welding.

If your workpieces are more than one centimeter thick and you do not know how to weld a ceiling seam, then know that in such a situation welding must be done in stages. At the very beginning of work, you need to use an electrode whose diameter does not exceed 3 mm; at all other stages, an electrode with a diameter of 4 mm is used.

Note! Welding a ceiling seam involves creating not only horizontal seams, but also connections along a certain slope (from 10 to 80°C). In this case, both manual welding and semi-automatic welding can be used. You can also use arc welding using coated electrodes.

How to weld a ceiling seam correctly. Recommendations for Beginners

As already noted, the main distinctive feature of such welding is based on an inverted weld pool and holding the hot metal by tension force. It is very important to maintain the minimum size of the bath and sometimes move the electrode to the side so that the metal has time to cool and set. In addition, this welding method will protect your connection from cracks.

Safety Recommendations

In order to obtain a reliable and durable seam, all safety regulations must be followed. Not only the quality of the seam, but also your personal safety depends on compliance with the rules.

• Be sure to insulate all wires, and when you pause work, completely turn off the welding machine. This way you will protect yourself from electric shock during the welding process.
• It is recommended to weld ceiling seams in a warm, dry room.
• Under no circumstances should you work in rainy or snowy weather. Only specialists with extensive experience should carry out welding in wet areas, but even then you should be extremely careful.
• Wear special protective clothing, a mask and goggles. The entire body should be tightly covered with clothing.

In conclusion, it is worth noting once again that welding ceiling seams is a rather labor-intensive and energy-consuming process. It is quite difficult for a novice welder to make this type of connection.

In order to do the job efficiently and create a good, strong seam, you need to gain special knowledge, master the technique of working with a welding machine and become familiar with all the nuances of this type of work. It’s better to practice welding some parts first. If you do not have enough knowledge and experience, then it is better to entrust this process to specially trained people.

In any case, both experienced welders and beginners must strictly follow safety rules. Accurate compliance with all requirements and instructions is the key to your personal safety.

Source: https://svarkaed.ru/svarka/shvy-i-soedineniya/kak-svarit-potolochnyj-shov.html