In almost every host, there is a situation when it is necessary to install a greenhouse or sewage laying to change the bend of the metal rod. How to bend profile pipe At home is quite easy to do with their own hands, it does not require specialists for this work.

Private homeowner rarely have special equipment available. Therefore, you need to know how to bend the aluminum or steel pipe itself for the greenhouse, the visor (canopy) and other needs without pipe bend.

Photo - flexible pipes without pipe bender

It is very convenient to produce this work with welding inverter and household grinder. To begin with, the drawing is developed, in the future it will be distinguished and the required angle will be calculated. In the scheme necessarily exactly measured the rounding.

Step-by-step instructions from the expert how to bend pipes with the help of vice, grinder and welding machine:

1. If it is planned to be built a semicircle made by a semicircle, then there are several thin cuts on the site of the alleged bend;
2. You can only perform work on your own only if you first fix the reinforcement in clamping visits. When the rods are made and cleaned from chips, you need to begin bending the pipe carefully;
3. After the ring closed, you need holes that were formed as a result of bending, boil the welding machine. Some masters use simple soldering iron if communication has a small diameter;
4. So that the seplace of the bend is neat, it will need to be additionally completed and covered protective aneg - This will help to prevent the emergence of corrosion or premature destruction of the connection.

Smoothly bring the pipe with a springwhich is suitable for the size of the profile section:

1. Communication is fixed in vice;
2. A spring of the corresponding diameter is inserted into the hole. It will not give it when flexing the profile tube to break or take the wrong shape;
3. To facilitate the work, you need to warm the place of the joint and gently manually cross the communication at the desired diameter;
4. It is very helpful to help the various products suitable from metal, say, Bulgarians, Arches, etc.

Similarly, you can try to deform communication with sand. How to bend a pipe for a canopy without use of vice and springs:

1. You need to fill one end of the tube, closing it with a wooden wedge or any other plug;
2. A closed end pipe is fixed in the ground or vice (if possible). You can also use any other device that allows you to establish communication;
3. After that, you need to fall asleep into an open end of the sand and warm up the soldering lamp;
4. Heated lamp need to be held at the place of future bend, after which it gently bent the pipe in fit form. It is necessary to work fairly quickly, since the metal after it cools it is unsuitable for processing.

Video training on how to heat a pipe 20 mm without pipe bender with sand

After carrying out the bend, the pipe is required for some time in a fixed position - this will help the material consolidate its new form. If work is carried out in winter timeThe masters put them on even frost.

Arch (canopy) without pipe bender

As is known for a canopy, for example, in the form of the arch, a curved profile tube is needed. It is important to make that the arcs are equally curved, otherwise the canopy will not work. Now we will look at how to do it without the use of the machine, pipe bending and other auxiliary means of this kind.

We need:

• Support on which we will work, for example, a metal table;
• As a beam, you can take a pipe 80 by 60 or 50 by 50 mm 3 meters long. But this method is universal - therefore, as a result you will have a beam-support is not important;
• Profile pipe 20 by 20 or 20 per 40 mm, which we will bend.

Procedure (step-by-step instruction):

Important comment from the expert:
In the length of the racks and lies the whole secret of flexion profturb arch for your carport. The length of two racks are formed from the length of the middle rack (we have 250 mm - you can take another length, but not more than 250 mm - otherwise the pipe with bending can break). The coefficients of 0.8888 and 0.5556 are valid at any length of the support and the central rack.

Video instructions on how to bend proftrube for a canopy (arches) without pipe bender

Now consider how to bend the pipe is already using a pipe bender

There are two types of pipes:

1. Profile;
2. Round section.

Depending on the needs, you need to choose a certain option, but it should be remembered that it is much easier to work with round-section fittings than with square. The fact is that when grasped corners can be twisted or flattened, moreover, the high probability of cracks appearance.

Photo - Greenhouse from profile pipes

To bend profile pipe at home, you need to work as a special device - or a profileger. Their feature is the ability to establish communication to the device and fix it in a certain position. Due to pressure that turns out to be equally exterior anglesand on the internal, smooth flex is formed without sharp drops and cracks.

Photo - Mechanical Profilegic

Exists two types of profilographic equipment:

1. Manual;
2. Professional automatic.

The first is a pretty simple device that consists of working surface (Tables) and rod rollers. Due to the movement of the rollers, the pipe moves across the desktop and changes its angle, while not distorting the desired semicircle.

Professional devices are more convenient to use, but their cost often exceeds 20,000 rubles. They are used for complex work, most often required for the production of complex decorative metal elements. The advantages of the model include the perfect radius, which will be accurate literally up to the tenth lobe. Of course, with the use of the machine it is more convenient to work, but at home it is practically not needed, since it is designed to handle a large number of pipes per shift.

Photo - Hand-made pipe bending

Many craftsmen who perform small repair and construction work on the house, faced the need to perform pipe bending. But how to bend a profile pipe with your own hands is known to everyone. The task is solved quite easily. The main thing is to know certain subtleties of the procedure and have with you required tools.

How to bend profile pipe

Features of the material

The profile tube is widely used in construction, starting with frames for graceful Arch In the palication and ending with the functional elements of the house.

Such popularity is easily explained by the fact that in comparison with the pipes of the circular section, the profile looks more winning and presentable.

It has a rectangular or square cross section, which significantly limits the use traditional options Pipe bending manually. The only way out in this situation is to use special equipment For bending profile.

Profile pipe is widely used in construction

But in addition to the presence of special equipment, certain skills should be made of such a type of work. In case of non-compliance with technology, the likelihood is considered that the cross section or flattening elements will occur.

Before you get a profile pipe, pay attention to the following parameters.

The steps described can not be adhered only if you use special devices for flexible profile.

Fixtures for flexible tube

It is easiest to bend a profile pipe with your own hands, you can apply one of those described below.

Pipe bender is designed for flexible pipes with a cold method by stretching

Manual models of pipe boobs

Complete to the device, replaceable rollers are selected depending on the size of the profile cross section. The resulting stretching provokes a displacement in the fragment of the neutral axis of the pipe. Due to this, the likelihood of the appearance of folds and the creation of a "corrugated" pipe on the bending effect is reduced.

Pipe bending are two types:

• Roller - perform flexible workpiece by type of rolling. Apply to bending profiles for smooth radii.
• Hydraulic lever - work on the principle of the lever at the expense of an effort in a certain place of workpiece. Allow you to attach metal designs Any angle.

There are on sale pipe bending, which are perfectly suitable for both drone pipes and profiles. Due to the low productivity of the device, manual pipelogib is not suitable as professional equipment.

Covers: Before performing a flexible tube on a radius, you must first make a fold closer to the ends and only after that move to the middle part.

Manipulations with a tool should be done carefully so that the billets do not have no flattens and appeared on the metal

Main types of profilegibov

The machine for bending profile pipe with their own hands is a mechanism with rollers.

There are two types of devices:

• Manual Machine - The device equipped with rollers and shaft is activated due to muscular efforts. Effective in processing a small volume of material.
• Electric Aggregate - professional equipmentallowing you to set the radius gradation with an accuracy of the unit.

With the help of rotating elements from the profile, you can go even rings

When working with a machine to bend manual way It is worth being prepared for the fact that the work will require significant physical efforts.

In the devices on the electric drive, the profile worst across the edges of the latch and stretches with the machine mechanism. In parallel with this, under the action of the motion of the bending template of the cylindrical shape of a given radius, the profile is bends.

The bending is produced by creating an internal hydrostatic pressure. To do this, on the ends of the segment they put the cap, and the pipe itself is filled with liquid, after which the desired shape appropriately apply with the use of a bending template. This approach allows you to carefully bend a profile without losing the resistance of its walls in the bending places.

When working with profiles made of stainless steel, hydraulic machines are used

But due to the high cost of this type of equipment, the machine should be purchased with frequent use if necessary.

Flexible profiles with appliant means

With a single need to break a profile having a small cross section, some craftsmen are resorted to the so-called folk remedies.

Prepare the equipment necessary for bending, proceed to work.

Excellent assistant in this case welding machine And Bulgarian.

Performing it in a specific sequence:

1. Determine the radius of the profile rounding.
2. In places of the bending area, several transverse propilov from three sides are made at an equidistant distance. The smooth bend depends on the frequency of propyl.
3. Pressing the locations of the propellers, wound up the workpiece. Wooden pattern will help to simplify the process, the external edge of which repeats the desired contour.
4. Socked places are welded, creating a solid surface.
5. Welding places are treated and stamped.

But this method is effective only for bending in thin-walled profiles made of copper. Steel and polymeric materials.

Video instructions: Arched pipe bender for profile pipe

July 24, 2016
Specialization: Capital construction work (bookmark the foundation, construction of walls, roof design, etc.). Domestic construction work (laying internal communications, roughing and finishing). Hobby: mobile connection, high tech, Computer equipment, programming.

Recently came to my mind to make a gazebo on the metal cottage plotYes, not a simple, but with frills and bends fashionable to boast of friends and acquaintances and surprise them with something. To do this, you needed curved details, and I did not like the pipe bender from the city and I did not want to go behind it (I have already a little cognac for mood). Therefore, I had to go out of the situation and decide how to bend a profile pipe at home.

Features of flexible profile pipes

If you have not so long ago to do something around your own hands, you may not understand the importance of the problem. Indeed, what's difficult there: Introduce her hammer in any direction and that's it.

However, to give a profiled pipe smooth and curved configuration, while retaining all its technical specifications, not so simple. This is usually done with a special pressure under pressure with a cold or hot way.

The essence is that on rectangular profile With a sewer, two forces act at the same time:

• compression - from the inside;
• stretching - S. outside.

As a result, several difficulties arise, due to which the locksmith and invent different tricks for folding pipes:

1. Metal rolling in the process of mechanical exposure can change its shape, as well as lose the alignment of individual parts. As a result, the edges of the part will lie in different planes, which will not allow you to use it when mounting.
2. The outer wall, which is stretched in the bending process, may not withstand the mechanical load and crack, losing the necessary strength.
3. The inner wall, on the contrary, will incorrectly shrink and forms folds, with your own kind resembling a corrugated pipe.

In principle, I have repeatedly met with occasions when the wrong bending blank is simply crushed, after which it can only be thrown into scrap metal. This leads to an unjustified increase in the cost of construction, which for the maternity owner of death is like.

That is why it is necessary not to rush right into battle with trimming pipes, but to study the technologies of bending pipes. And by the way, they are directly dependent on technical characteristics Hire used. I want to tell about it next so that you understand the whole mechanics of the process.

The influence of the characteristics of the material on the choice of the fold method

If you do not know yet, I inform you that the concept of "profile pipe" includes pipes of all geometric shapes, including round. But for the simplicity of understanding, it is called only the products of the following forms:

• square;
• rectangular;
• oval;
• plane.

This is due to the fact that the metal round pipe Used to design water and gas transmission systems, it is ideal for this suitable and has durable walls that are well withstanding significant pressure.

Pipes of other forms are more used in construction to create different facilities and constructing object items. Then I will tell only about square pipes, as it is exactly about to use them for construction.

So, square pipes in the store also happens a lot. They differ from each other with a cross section and wall thickness. And these two parameters, in turn, affect that at what minimal angle can be bent a square metal, without spoiling it.

I do not want and will not go into engineering subtleties and features that do not need to homemade masters and for nothing. I just say that to determine the minimum bend radius you need to know the pipe cross section.

The radius is determined:

• for thin pipes, the cross section of which does not exceed 20 mm, the pipe must be bent on the site, 2.5 times greater than the height of the profile;
• for thick pipes, the bending must be produced on the site, 3.5 times more, otherwise the metal will crack from the outside or wrinkled with the inner.

On the thickness of the walls. Personally, I do not advise to curb large on the cross section of the pipe with too thin walls, otherwise the details will lose alignment.
It is better to use the grinder and the welding machine.

Before you bend the profile pipe will be able to know and what you use steel tubes From carbon steel, they have a bit of spring, that is, to return the form after stopping the impact. Therefore, in order to bend the pipe under the desired radius, you need to take into account the plasticity, making a bit more than necessary according to the drawing or lecture.

Methods of flexible pipes

In general, I decided that it was enough to load your head theory (although without it could not do). Therefore, I proceed directly to how to get a profile pipe at home.

Quite often in my practice, I broke the profile pipes, at the same time warming the place of bend soldering lamp. Heat Increases the plasticity of the material and reduces the risk of damage.

But if you use fine metal rolls for construction, you do not need to resort to additional tricks. Square pipes and so take the form you need. Of course, if you approach this case with due skill.

I can't give you an unequivocal advice, in what cases you need to use heating, and in what no. I just say that in force building Rules It is planned to heat a round (non-square) pipe, if its diameter exceeds 10 cm.

However, I will give your own considerations that have developed as a result of many years of work at construction site:

• if the pipe cross section does not exceed 1 cm, I would not even mention any heaven;
• in cases where the pipe cross section is more than 4 cm, they would still advise the use of a soldering lamp so as not to spoil expensive rolled metal;
• in the interval between the two above extremes decide for themselves.

You can try to bend the pipe by closing one end in the vice. If the pipe is noted easily and does not frown, you can not warm it. If you go well - warm. I will tell about the one, and about that ways.

Hot flex profiled pipes

I will start with hot bending, like more complex. To avoid the deformation of the pipe, its cavity must be filled with sand. In this case, you will get the item, appearance Which will satisfy even the most strict wizard of the OTC (out of the past inspired).

The process of hot flex the profiled tube is as follows:

1. From the appropriate woods (I take two lumps) I pull two plugs that are suitable for the size for the existing pipe. They must be tightly enter the side openings of the details and not hang out.
2. Then the side of the traffic jams, I choose small grooves through which the hot gases and a flexible metal pipe will be discharged.
3. That plot that will bend, first annex.
4. Then I am preparing a filler, the role of which I play clean river sand (Although, in principle, any fine-grained sand can be used).

Flipping sand into the pipe occurs according to the following scheme:

• one end of the pipe score a plug;
• pouring pre-sand with a soldering lamp;
• i fall asleep sand into the workpiece installed perpendicular to the ground or at an angle;
• during falling asleep, tapping on the pipe so that the sands are distributed evenly, without leaving voids;
• after complete filling of the workpiece, I close the cork on the second end of the pipe.

I recommend saming sand before use, getting rid of gravel and small pebbles. First you need to use a large sieve, and then fine, with a cell size of 0.7 mm to get rid of dust particles.
If this is not done, the sand will be baked inside the pipe and pour it out from there will be problematic.

1. After falling asleep filler, turn to bending. To do this, I find the workpiece with one end in the vice and chalk mark the place that will need to bend. Detail needs to be fixed so that welded Sow. Pipes (if it is not solid), is located on the side. IN otherwise He can burst.
2. Soldering lamp I split the desired area to a dark cherry blossom and give the pipe the desired shape. It is necessary to do it a quick, but smooth movement, following the bending to be made in the same plane.

1. After cooling the metal, knock the plugs and pour sand out of the pipes. If a wooden bars It will not be possible to knock out, burning them with a soldering lamp.

Immediately warn you that this method is suitable if you need to bend the workpiece under a certain (not very large) radius in one place. That is, heating the metal will have only once.

Otherwise, constant temperature fluctuations disrupt the strength of the metal and the part can simply burst.

Cold bending

Bend the profiled tube without its heating can be using the aggregate without it. If the section does not exceed 10 mm, you can do without filling the cavity. It is better to fall asleep sand in a large pipe.

Sometimes profiled pipes I brcked using a dense spring suitable size. It is placed in the cavity of the pipe, after which bending at the desired angle, without fearing the displacement of the part axes.

In this case, it is important to pick up right size Springs. It should enter the pipe tightly, but move freely. Otherwise, then this item can not get this item.

If you need to bend the pipe under the desired radius, and there is no solder lamp at hand, I propose to use another way to which I also had to resort. For its implementation you will need sander With a disk for cutting metal and a welding machine.

Scheme of work Next:

1. It is necessary to calculate the inflection radius of the pipes and the segment to be bend.
2. On the length of this section, on the one hand, it is necessary to make feeds, leaving the intact one line of the pipe. The number of these propyl depends on how small the bend radius should be.
3. After that, thanks to the resulting saws, you can easily bend the part by holding one of its end in the vice.
4. The next step is welding damaged sections with an electrical or gas welding machine.
5. As soon as the seams are cooled, you can clean them and weld.

Using special equipment

All methods described above can be used if there is a small amount of work. However, when you give a smooth bend large quantity Details, you will have to use specialized equipment. It can be done by himself, buy or rent.

I'll tell you a little more about this, as there are quite a lot of questions like this kind, so I consider the topic relevant.

Simple manual pipe bending

At one time I had to bend a considerable amount of metal, so I can even give a lot of examples simple devices For flexion. As I said, a specific mechanism depends on the cross section of the pipe, the wall thickness and the necessary bend radius.

For homemade masters, conceived to build an arched structure from profiled pipes I offer such options:

1. Thin profiled pipes can be bent using a horizontal steel plate with drilled holes. Pins are inserted into them, which play the role of stops when giving the workpiece the desired form.

It is necessary to position the pipe between the stops and bend it at the desired angle. You need to start from the middle of the details and move to the edges. As a result, the pipe bend it turns out, but you will not reach the perfect shape, and the forces have to make a lot.

1. Pipes of medium thickness recommend bending with rollers interconnected by way like a Voltan machine. In this case, the item needs to be fixed in the vice, after which it is necessary to perform the billets with the help of special rollers.
   The quality of the bend is better than the technology set out in the first paragraph. However, given the thickness and cross section of the workpiece, you need to be a slight athlete to bend items. Especially if there are many of them.

1. To flexing parts under a small radius (for example, arches for the arbor), you can use homemade patterns with a groove on the end and a hose for which the pipe is engaged.

As in all previous cases, a considerable physical effort must be attached for flexion. But the detail takes perfect formdue to the configuration of the sample.

Bending plate

If you like to make your own hands and often use profile pipes, I recommend spending time and make a stationary bending plate that will help bend any square and rectangular pipes at the desired angle.

It can have a kind of mobile panel, which is attached to the clamps to work to work. Also, the plate can be welded to the chapeller or rail designed to the floor of the workshop.

Making a universal bending plate as follows:

1. The basis for the device will serve a thick metal plate. It is better to take the metal thoroughly so that the device is not deformed when flexing thick pipes of a large cross section.
2. In the stove it is necessary to cut or drill a few holes where to insert bolts that will serve as stopping pipes under the desired angle.
3. The radius of the flexion of the pipe during operation can be adjusted by the appropriate diameter by the nozzles that are put on the bolts.
4. To preserve the coaxiality of the processed billets while working on them, you can install another plate that prevents the part of the part in another plane.

Mandrel for flexing pipes

This plumbing device is used to treat pipes, whose cross section does not exceed 2.5 cm. It will take free space for its manufacture and a large free space around it. In one edge of the work surface of the workbench, you need to drill a plurality of holes in different places that are necessary to fix the support bolts.

In addition, it will take patterns from thick plywood, according to which the billet will be flex. The form of the part after processing will accurately correspond to the diameter for which plywood is cut.

A minus such a solution is that you need to change mileage every time you have the need to bend a pipe under a different radius.

The scheme of working with such a rim is as simple as possible:

1. The end of the pipe is fixed between the bolt and the mandrel (lecturer), which, in turn, is firmly attached to the workbench using several clamps.
2. After that, you just need to bend the pipe, laying it on the milestone.
3. If the workpiece is short, it is possible to wear a larger cross section (or diameter) to its end, which will play the role of the lever.

Manual bending machine

If you are going to open own business for the manufacture of arched structures from profile pipes, all manual devices You will not fit. After several days of work, your hands just fall off, so it is better to immediately mechanize the whole process.

For flexible pipes in this case it is better to use homemade or purchased bending machineconsisting of two fixedly fixed and one rolling roller. Adjusting the position of the latter, you can change the bending radius of the square or rectangular pipe. Although the price of the machine is rather big, he will save you great amount Force and time.

Output

Now, I hope you understand how to bend a profile tube without pipe-bending and with the use of special equipment. As you can see, if you know some secrets and technologies, there is nothing complicated in this process. You can safely begin work.

And if you have your own flexure technologies of a square or rectangular cross section, I will be very grateful if you share them in the comments.

Draw more creative ideasconcerning the construction of houses and recruitment land plots You can from the video in this article.

July 24, 2016.

If you want to express your gratitude, add clarification or objection to ask the author - add a comment or tell me thanks!

With the need to flexing profile pipes in everyday life, it is not necessary to face. Before such a task, the owners are most often dacha plots Or private houses - people who are accustomed to everything to do their own hands.

Regardless of the shape of the pipe profile, the essence of the flexible process is to give the product of partial or complete bending. You can achieve this can only with the applied of a certain external effect - exclusively pressure or totality of heating and pressure.

From the point of view of physics, in the process of bending to the profile pipe, two multidirectional forces affect simultaneously:

• Stretching. Manifests itself from the outside of the bend.
• Compression power. Aimed at interior bending area.

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

• Different parts of the pipe in the bend zone may not be able to change the form that will inevitably lead to a violation of their alignment.
• The wall of the pipe from the outside of the bend with strong tension can lose strength or even burst.
• On the inner side Bending, on the contrary, folded folds in the process of compression.

To avoid these troubles and not get instead of a smooth crumpled pipe metal surfaceIt is worth it to take into account the type of material and numerous geometric parameters of the product: the wall thickness, the cross section diameter, the bending radius. Knowledge of these characteristics will allow you to pick up optimal way bend

Note! Experts argue that profile pipes with a thickness of the walls less than 2 mm is better not to bend. The strength in the collapsion will be low enough, even with ideal technology compliance. For such pipes, it is better to prefer welded connections.

Principle of using pipe-bend

Bend the profile tube (especially for large diameter products) does not always seem to be possible with their own hands. For these purposes there are special devices - pipe bending. Standard pipe bender is equipped with a driving wheel, which, moving along one of the faces, gently bends the cutting of the pipe in the desired direction.

Often there is a question how to bend a profile pipe without a pipe bender? It is known that the implementation of various construction or repair work on the country plot It assumes the widespread use of profiled pipes.

The use of this type of rental has a number of benefits:

1. It has great strength with relatively low weight.
2. The profile tube can be used when installing any designs from greenhouse to different canopies, arbors or veranda.
3. Ability to process welding or various species hand tool Allows you to perform most of the work with your own hands.
4. The design collected from the square profile will look much more attractive than its analogue from the traditional round tube.

If there is a desire to make an arched construction for decorating the gazebo or mounting the greenhouse, you will have to be bending manually or resort to the help of specialists.

Main features of bend technology

It is necessary to clearly understand the processes that occur in the metal with its controlled deformation. The main goal is to obtain a uniform curved form without a violation of the integrity of the rolling profile. For proper flexion of the pipe of any transverse section, two methods use two ways:

• flexion under the influence of external effort;
• the combination of pressure and local heating on the bending area.

In both cases, the following processes occur at the same time - the material of the outer layer of the arc will stretch, and the inner layer is compressed. As a result of bending, a significant excess of the load can lead to cracks and the destruction of the external wall of the pipe. Inner surface It may lose its smoothness, while there are well-visible metal folds. Violation of the process technology can also cause the walls of the pipe walls or disrupt their alignment. A similar phenomenon is extremely negatively affecting the aesthetics of the resulting Arch and the reason for its forced sharing.

It is also necessary to take into account other parameters. Great importance You will have a radius of the desired curvature, the thickness of the wall of the workpiece, its material and the cross-sectional dimensions.

Industry produces profile pipes that have a square, rectangular, oval, flat or round cross section. Use when performing construction work Square products I. rectangular shape has its advantages. Such pipes are much more convenient when performing mounting work. They simplify markup, docking and fitting the elements of the design. To the flat surface of such a profile is much easier to mount various coatings Or combine them with other materials.

Methods of cold flexible pipes: A -C running; b - wintling; in - dragging; r - rolling; d - on two supports; erachny; zh-with internal hydrostatic pressure; and - through a filler having a curvilinear axis; To - through copiers.

Special attention must be paid to the height of the section. This indicator determines the plastic parameters of a specific rolling material variety. Based on its magnitude, the maximum bending is calculated. Denote by the height of the H. Then, with a value of up to 20 mm, it is possible to cut the pipe without destruction on a plot of 2.5 × H and more. In cases where h\u003e 20 mm, the formula has the form: 3.5 × H and more. Violation of this rule will lead to the formation of cracks or total metal charge.

It is necessary to take into account the thickness of the profile walls. If it does not exceed 2 mm, the material bending is impractical. In such cases, it is necessary to apply welding. Thicker walls are bending, but the increase in thickness significantly complicates it.

The material of the rolling profile can also have its effect on the process. Pipes from low-alloy and carbon grades began to have significant elasticity. Such material after removal external Load She strives to restore the former shape. This will require re-processing up to the time of maintaining the required radius arch. Copper pipes deprived of this shortage. Due to the high plasticity of the material, they easily change the form and save the altered state after removing the load.

Methods of flexing profile and sequence of their execution

The choice of a flexible method depends primarily on the magnitude of the cross section and the available tool and equipment. Typically, materials of small sizes bend in cold condition. Such pipes have sufficient plasticity and can be controlled deformation with minor external efforts. For profile big size Heating is usually needed. The temperature effects significantly increases the plasticity and reduces the desired value of the supplied pressure.

For round-section pipes, heat treatment is used in diameter from 100 mm and more. For square I. rectangular products The calculation takes into account the height of the cut. If the profile height is up to 10 mm, the heating does not apply. With a height of 10 to 40 mm, the processing method is selected based on the experience and capabilities of the artist. When the size exceeds 40 mm, the local heating is necessary.

The presence of pipe bending allows you to manufacture arched structures without additional heat treatment. In cases where machine processing is not possible, trial bending should be performed. The profile is clamped into vice, the pipe is put on its protruding end larger diameterwhich is used as a lever for the accomplished effort. It is not necessary to use heating.

Bending with local heating

Technology of this processing provides for the filling of the pipe with sand. Its presence in the inner cavity of the product guarantees the quality of the manufacture and uniformity of the arch.

Initially, it is necessary to prepare two wooden plugs. For dense clogging, they must have a pyramidal form. The length of the plug must exceed the profile width of 10 times. After the manufacturer of the plugs are trying to the holes of the pipe, checking the density of the fit. Next, the longitudinal grooves on the side surfaces are separated on one of the tubes. Their presence is necessary to relieve superheated air from the pipe during heat treatment. The place of the future bending of the product is determined and the pre-heating of the metal is performed.

After that, proceed to the preparation of sand. Best use dry and pure Material medium grain. It is sequentially sifted through sieve with cells in 2, and then 0.7 mm. At the same time, large impurities are removed capable of causing a barride surface, and dust that can hide inside the pipe. The filler is suspended to a temperature of 150ºС.

We score a tube in a pipe that does not have longitudinal propilov, and through the funnel we fall asleep the prepared sand. When drought it is necessary to tap wooden Cyanica According to the walls of the profile to ensure the sealing of the material. After final filling, the second stopper is installed and tightly clogged.

A fully prepared pipe is located in the vice or tube clima next to the template. If there is a pipe seam, it must be arranged on the side surface of the arch. The plot marked with a chalk is heated by a soldering lamp to red and bends with one smooth unwitting movement. The resulting arch is compared with the template, after which the plugs are extracted, and the filler is poured. It must be remembered that repeated heating is extremely undesirable, as it significantly reduces the strength of the material.

Bending without heating

The question is how to bend profile pipes without pipe bender, you can solve without temperature effects. The use of filler depends on the size of the cross section. If its height does not exceed 10 mm, the sand is not needed. For large sizes using bulk material Very preferably. Alternatively, it is possible to use the steel spring made of a wire with a diameter of at least 2 mm. It is pre-placed at the place of the future bend to give it a smooth uniform circuit. The technology of the process itself completely coincides with the hot way except for the heating of the metal.

Application during the bending of profiled metal of manual pipe bending or specialized machines significantly speeds up and facilitates the process

The work of professionals guarantees high contour accuracy and its quality. But if the possibility of attracting them is not available, it must be remembered that this work can be done on its own, while significantly reducing your expenses.