How to bend 6 meter profile tube. Flex a profile pipe at home without pipe bender in several ways. Pipe bending with the help of a grinder

The question of how to bend a profile pipe, not using special equipment for this, many of those who are going to build a greenhouse on their homely plot. Such structures made of bent pipes not only pass significantly more light, but also differ in high stability and durability, if you compare them with structures from wooden bars. It seems that the proftrubube, creating an arched structure, is not easy, but if you understand the features of this process, it is quite possible to effectively perform it using the simplest devices.

What is the difficulty of flexing profile rental

The essence of the flexible metal rolled, regardless of the form of its profile, is that the profile pipes are given partial or full bend. Perform such a technological operation in two ways: acting on the bent pipe only with pressure or additionally heating the pipe of the pipe, in which the bend is performed. In the course of bending, two forces are simultaneously operating on the metal pipe:

compression force (from the inside of bend);
the strength of the stretch (from the outside of the bending area).

It is the impact of such multidirectional forces that causes complexity characteristic of the process of flexing any profile pipes.

The segments of the pipe material, which in the process of bending changes its shape, may lose the alignment of its location, which leads to the fact that individual pipes of the pipe will be located in different planes;
The wall of the proftrub, located on the outside of bending and exposed to stretching, may not withstand the load and burst.
The inner wall of the pipe, subjected to compression, can be covered with folds that resemble corrugations.

If you do not take into account the subtleties of such a technological process, then instead of bending the profile tube, you can simply minimize the product, irrevocably spoiling it.

So that this does not happen, it is necessary to take into account not only the characteristics of the material of the pipe, but also its geometrical parameters are the size of the section, the wall thickness, the radius to which the bend must be performed. The knowledge of the listed will allow you to choose the appropriate technology and bend the proftrube correctly, without resolving it and without receiving a corrugated surface.

The need for accounting profile

Categories of the profile pipeline include products having a different cross-sectional shape - round, square, oval or flat. Despite such a variety, for the construction of a greenhouse or a canopy mainly use rectangular or. This is due to the fact that on their flat walls is much easier to mount the external coating.

The range of modern profile pipes is characterized by a large variety. Their geometric parameters, the main of which are the cross-sectional area and the wall thickness, determine the plastic capabilities of the product. The latter characterizes such an indicator as the minimum allowable radius of rounding. It is this parameter that allows you to determine which the minimum radius can be bent a professional to be bent so that it is not damaged.

To determine such a pipe parameter with or a rectangular profile, as a minimal bending radius, it is enough to know the height of its profile. If you are going to bend a profile pipe with a cross-section in the form of a rectangle or a square, you should follow the following recommendations.

Pipes, the height of the profile of which does not exceed 20 mm, can be bend in areas whose length exceeds the value of 2,5хh (H is the height of the profile).
Products, the height of the profile of which exceeds 20 mm, can be successfully bend on areas whose length corresponds to 3.5xH and more.

Such recommendations will be useful to those who are going to bend profile pipes in order to make racks, canopies and various frame structures from them. At the same time, however, it should be borne in mind that the possibility of high-quality flexion of pipes affects the thickness of their wall. Products, the wall thickness of which is less than 2 mm, it is better not to bend at all, and if it is necessary to create structures from them to use welded connections.

At home, bend proftrube, which are made of carbon or low-alloy steels, can only be taken into account certain nuances. Such pipes after bending can sink and return to its original state, so the finished structures must be re-customized by the template. The magnitude of the skip characterizes such a parameter of profile pipes, as the plastic torque of resistance - WP. This parameter is indicated in the accompanying documentation (than it is lower, the less promotion profits in the process of their bending).

Features of the most popular methods of pipe bending

In production or homework, proftrube is bent both heating and cold condition. Heating, which is produced using a gas burner, significantly increases the plasticity of the metal, due to which less effort is required for bending. Pipes of a small section can be bent and without heating, because they are so different with a good plasticity.

Regulatory recommendations regarding the use of heating are available only for round-section products. So, heated before flexible the pipes, the diameter of the cross section of which exceeds 10 cm. In cases where the square or rectangular pipes are bend, it is necessary to navigate on their own experience or tips of other home masters.

Without preheating, the pipe is bent, the profile height of which does not exceed 10 mm.
If the height of the pipe profile exceeds 40 mm, they must be heated before flexible.

If at your disposal there is a pipe bender, with it, you can easily handle the task of cold flexible pipes, the height of the profile of which is in the interval of 10-40 mm. In the absence of such a device, it is necessary to solve the question of how to bend the pipe without a pipe-bender, after conducting uncomplicated tests. They will help you determine, you should heat the proftrub before flexible or not. These tests are carried out as follows. One end of the pipe is clamped into vice, and the second is put on a pipe with a large size of the internal cross section. If with the help of such a shoulder, it is possible to bend the pipe clamped into vice, you can perform this process without preheating.

Flexible pipes on various methods well demonstrates training video, but it will not be superfluous to pre-examine this process in all details.

Bending Prof Pedube with preheating

To bring the profile pipe with your own hands with a hot method, you must first fill it with sand. This will make the bend better and uniform. Because you have to deal with hot metal, all work should be performed in dense tarpaulin mittens. Bending itself, with the implementation of which can be found in the video, is performed in the following sequence.

Both ends of the profile pipe must be closed with plugs that are made of wooden bars. The length of such plugs should be 10 times the width of their base, which, in turn, should have an area, twice the area of \u200b\u200bthe hole in the pipe closed with their help.
After fitting the plugs under the inner section of the pipe on one of them, 4 longitudinal grooves are performed, which are necessary to remove the gas accumulating in the pipe when the fill-fill sand is heated.
The proftrub plot, which you plan to bend, is required to be supervised.
As a filler for a pipe, you need to use the sand of medium grain. If there is no purified building sand, you can take any, even from the children's sandbox, but it should be prepared accordingly. So, the sand is first sifted through a sieve with a cell size of 2-2.5 mm to remove gravel and fine pebbles from it, and the final sifting is performed on the sieve with the cell sizes of 0.7 mm. The final sifting is necessary in order to remove the dust inclusions from the sand, which can be sintered when heated.
Prepared sand needs to be hungry at a temperature of 150 degrees Celsius.
Before grazing sand, one end of the pipe is closed with a plug, on which there are no gas-sized channels. A funnel is inserted into the second end through which the sand prepared sand is poured. To the sand evenly and tightly filled the entire inner cavity of the pipe, when it is covered, it is necessary to tapping through the walls of the product using a wooden or rubber image for this.
After full filling of the pipe with sand, its second end is also covered with a plug.
A plot that will be heated for further flexion must be noted in chalk.
The pipe must be fixed in vice with a template or in a pipe clina. It is important that the welded seam is, if it is on the surface of the product, turned out to be on the side. It is necessary to adhere to this requirement because the welds are undesirable to expose to compression or stretching.
Plot pipe, previously marked with chalk, heat hot with a gas burner. After a complete warm-up, the pipe neatly, without making sharp movements, bend into one intake, applying efforts strictly in the vertical or horizontal plane.
After cooling the bent pipe, the result obtained is compared with the template. If everything is fine, then the products are removed from the ends of the product and pour sand.

This method, which is easy to implement at home, is best used in cases where at the prom Profiter it is necessary to form a single angular bending. Multiple metal heating can lead to loss of its strength, and it is impossible to avoid it if you jet the pipe for its use as an element of arched design.

How to bend the pipe without preheating

Bend the profile pipe itself, without heating it before, you can, as with a filler, and without it. Do not require filling with sand or rosin pipes, the height of the profile of which does not exceed 10 mm.

There is another technique that involves the use of a sprocket with a dense navill of turns instead of the filler, which is inserted into the inner cavity of the prom and protects the walls of the product from the deformation, as well as from the excessive change in their thickness in the process of bending.

Those who need to bend profile pipes with their own hands, not previously heating them, you can use the learning video and the following simple recommendations.

It is possible to obtain the desired bending on profile pipes using the simplest devices - vice, mandrels, bending plates.
You can use for round-profile products. In this device, it is necessary to remake the working rollers, the shape of the excavation in which must correspond to the pipe profile.
It is possible to generate pipes most effectively and accurately with the help that can be purchased or made with your own hands.

Fixtures for flexible pipes

The question of how to bend the pipe without a pipe-bender will not cause difficulties if used to perform this operation the simplest devices. You can perform cold flexible pipes using the following devices.

In cases where it is necessary to bend a soft (aluminum) or a steel pipe with a profile height not more than 10 mm, a horizontal plate is used with holes in which the stops are inserted - metal pins. With these pins and flexible products are performed according to the required parameters. This method has two serious disadvantages: low accuracy of bending, as well as that when it is used, it is necessary to apply significant physical efforts.
Products with a 25 mm profile height is better bent using roller fixtures. The pipe is reliably fixed in the vice, and to that part of it, which must be bent, the force is applied using a special roller. This device allows you to get better bending, but also requires an application of physical effort.

An option that is called, an ambulance hand. The long lever of this is extremely uncomplicated device allows you to cope with rather thick pipes.

For forming on steel or aluminum promotional curvators, motionless rounded patterns are used on a large radius of curvature, which mount special clamps for fixing the product. On such an adaptation, the pipe is also hung manually, with an effort to lay it in the chamber of the template, the form of which exactly corresponds to the desired bend radius.

Plywood and metal brackets are everything you need for the manufacture of a bending template

Bending plate

In order to effectively bend steel or aluminum pipes at home, you can make an upgraded bending plate using the following guidelines.

The role of such a plate plays the panel, which is cut from a sheet metal of a large thickness.
The panel made in this way welded to the rack, which is installed on a special pedestal.
Two holes needed to install bolts that serve as a profile tube are drilled in the panel.
A special nozzle is installed on one of the bolts-stops, with which the bending radius is adjusted.
In order to ensure the coaxiality of the segments of the pipe adjacent to the split, over the workpiece placed the metal plate fixed by the bolts.

At that moment, when you do not use such upgraded pipe bending, its pedestal can be adapted to perform various plumbing operations.

Bending mandrel

For bending at home, profile pipe products, the height of the walls of which does not exceed 25 mm, you can make a special mandrel. To this end, it is better to use an overall workbench, on the surface of which there will be enough space for such a device. To select the optimal location of the element that locks the flexible pipe, often spaced openings are performed at one end of the workbench. For providing the desired bending radius, proftrub is answered by a special pattern that can be made of thick plywood or metal corner if you are going to use it often.

Application profilegiba

Of course, if you have a significant amount of work on flexible profile pipes, it is better to make a special machine for this, whose drawings are easy to find on the Internet. We will not take here to disassemble this question, since more than in detail is considered in the articles on the links below.

Do not do without such a machine and in the event that you need to bend pipes with a large cross section of the profile. The main working bodies of such a machine, distinguished by broad versatility, are three rolls, two of which are fixed motionless, and due to changes in the position of the third regulate the radius of the product bending. A chain transmission and handle that the operator rotates as a drive of such a device.

Obviously, the variants of devices allowing to effectively bend profile pipes for the manufacture of greenhouses, a canopy or other structures, quite a lot. Having considered these options and choosing from them that optimally comply with your capabilities and needs, you can always provide yourself with a convenient and inexpensive pipe bending device.

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If you started repair, you may need pipes. But in this case, they should be perfectly smooth. At the same time, the question arises on how to bend the pipe without a pipe-bender. If you are familiar with the tricks of this process, then you can solve the task quite simple.

How to bend the pipe at right angles

The metal acts as a sufficiently durable material, but with a special impact it can be bent. To date, several ways to solve this issue are known. As the first technology, the use of pegs. But you must remember that this method can entail damage to the pipe or even its breakdown. You can avoid this by filling in the inner cavity with dry sand. At both ends, install plugs.

At the next stage, you can begin bending. To do this, pegs are laughed in the ground. You will use them as levers. If you are not sure about your abilities, it should be trained on unnecessary pipe segments. If you faced the question of how to bend the pipe without a pipe bender, then with this technology you can change the shape of the product, the diameter of which varies from 16 to 20 mm. For pipes of a more impressive diameter, this technique is not suitable, as the process will be quite complex. It is important to consider also the material that underlies. For example, for galvanics it is recommended to use other methods.

Use of heating technology

Before you bend the pipe without a pipe bender, you should think about what technology it will be better for this. Perhaps an excellent solution will be heating. This method is commonly used for steel and aluminum pipeline. For the procedure, the product is fixed in vice, but it should be pre-fill it and heat the gas burner is the place that you plan to bend. The temperature is pretty simple: when the paper sheet approaches the pipe to the pipe, it should start smoking. When steel blank is used, it should become red when heated. For security, the master should be put on gloves.

Flat-parallel plate

If you faced the task, how to bend the pipe without a pipe bender, you can apply the plane-parallel plate. This technique involves fixing the product in the clamp. After that, you can make a bend, and it is necessary to do it along the plate. This reception is considered not only economical, but also simple. In order to achieve a positive result, several plates should be applied, each of which has different curvature. The main condition is the use of steel pipe. The length of the product should be quite impressive.

Using a metal spring

Quite often, homemade masters think about the question of how to bend the pipe without pipe bender at home. To do this, you can use a metal spring. This technique is excellent for non-ferrous metal pipes, which differ in good plasticity.

Spring is used to prevent deformation. To get a good result, you should consider the size of the spring, which must correspond to the inner diameter of the metal structure. This requirement is due to the fact that the pipe will be inserted into the cavity. After that, it is possible to be flexing, tightening the spring with a wire to simplify the process of further extraction.

If you need to bend a profile pipe without a pipe bender, water can be used as filler in return. The cavity of the pipe is filled, after that, the product is blocked on both sides by plugs. Water should be freeze, and after heat the material. However, this method cannot be used for galvanized blanks.

Profile pipe and her modification

This type of metal structures is quite popular when erecting greenhouses and arbors on the household plot. The main feature of the building material is that when flexing it can be damaged. The exit from this situation can be filling in the inner cavity with small sand or water. These actions make it possible to eliminate the likelihood of pipe damage and achieve excellent results. This reception is suitable for brass and duralumin pipes.

If you think about the question of how to bend the pipe without a pipe bender for a canopy, it can be used for this it is used for square profile products. The pipeline is installed on reliable supports, and after into the course there is a cioneer. Actions should be neat and smooth to eliminate the likelihood of damage. If you need to achieve a big angle, then to facilitate the process, it is necessary to heat the pipe in the place where it should be bent.

Methods of flexion of metalplastic

Quite often, the owners of suburban real estate are asked about how to bend the pipe without a pipe-bender. When there is a metal-plastic, then you can use your own forces without applying sweater. The product is clamped and smoothly bends. It is important to eliminate the likelihood of the appearance of the inflection. It is important to be guided by the rules that say that for every 2 cm blank the bending angle can be 15 °.

If you faced the question of how to bend the pipe without a pipe bender for the greenhouse, then you can use pieces of wire that is filled in the inner cavity. This allows you to achieve smooth and smooth bending in the shortest possible time. You can use dry fine sand as a filler. It falls asleep inside, and the edges are closed with plugs. Then one end of the product must be fixed, ensuring the reliability and strength of the mount. With the help of a gas burner or a soldering lamp, the bend seat should be heated. The material is checked for a paper sheet.

Polypropylene Pipe Flection Methods

If necessary, change the bend direction can be used one of the two possible methods. The first implies the heating of the bend seat. For this, a construction hairdryer is usually used. The optimal heating temperature is 150 ° C. Hands should be protected with gloves, which are resistant to high temperatures.

At the final stage, the product bends to the necessary form. The thickened wall must be located on the outside of the bend. Once the material is cooled, it will need to be checked for cracks and dents. Another way to flexing such a pipe is cold. However, the radius of bending should not be more than 8 diameters, otherwise the product may break.

How to bend a plastic pipe

In order to bend the PVC pipe, it is necessary to buy tree fiber plates. Of these, you can build a frame that will be needed to make the design of a certain form. As soon as the plate you give the desired shape, you should polish it, it is better to use small emery paper for this.

At the next step, it is necessary to form a silicone shell for a plastic blank. She will fasten the PVC design in the frame. In addition, it will perform a protective role from chips, mechanical damage and scratches. The subject is placed in the prepared protective shell, and after the place of bending heats up. Plastics softened and sits on a rim. Such actions will allow the desired form of plastic blank. The product is left until cooled. For this will be enough 15 minutes. After the PVC tube can be removed from the rim, leaving it until complete cooling.

If you faced the question of how to bend the aluminum pipe without a pipe bender, you can use a grinder to carry out work, with the help of which in the place of the alleged bend it is necessary to do several thin cuts. The product is pre-clamping in vice. As soon as the rods are made, they should be cleaned from chips, only after it is possible to begin bending the pipe.

Sometimes the product must be bent in the form of a circle. As soon as the ring closes, the holes are brewed, and some masters and at all for this use a soldering iron. In order to make the place of bend neat, it is additionally grinding and covered with a protective agent. This makes it possible to exclude corrosion and premature destruction of the connection.

Conclusion

It does not matter which material underlies the pipe. Perfect bend to achieve quite difficult. But if you first get acquainted with the theory, it will be possible to bend the pipe even without pipe bender.

The greenhouse frame with a square or rectangular cross section attracts reliability and service life. Extremely durable metal constructions misses the maximum of light, because its racks, supports, screeds are much thinner than the wooden rivals. Given the metal in the processability. Without knowledge of the nuances, it is difficult from a direct blank to make an arched arc or a frame for the door. Due to the specified complications with the metal base, the green houses are perfect in vain in vain. However, if it is pretty to figure out how to bend a profile tube for greenhouses, it is possible with minor costs to handle an inexpensive arched structure.

The essence and problems of flexing profile pipe rod

The flexible metal products, regardless of the section, consists in giving them a partial or complete smooth-curved configuration. One of the common plumbing procedures is carried out either only under pressure, or under pressure in combination with heating of the bent area. At this time, compression powers on the inside of the workpiece and the strength of the stretching along the outer wall are simultaneously operating on the trading part of the hollow metal blank. Complications are that:

material in the process of changing the form may lose the coaxiality of the segments, i.e. parts of the curved billet will not be located in a single plane;
a stretched outer wall on the bending area may not withstand the effects and tritely burst;
the compressible inner wall may instead of a uniform reduction to be folded with folds resembling corrugation.

Without knowledge of the subtleties of profile flexion there is a risk just to minimize the product by spoiling the workpiece. But the recklessness is not our way! Especially if it is accompanied by material losses. In the glory of rational economy we will take into account all the whims of the profile and the characteristics of the "iron" material. Do not forget about the size of the section, the thickness of the walls of the profile pipe, the required bending radius and the elasticity of the steel alloy. Focusing on the specified parameters, choose the correct technological path - it is the method of bending.

Why do you need to know profile characteristics?

The profile pipeline from the standard round variant is characterized by a cross section, which can be square, oval, rectangular or flat. According to the GOST RLUNY, number 54157-2010, the round product is also included in the list of profile products. However, in greenhouse construction, products with a square and rectangular cross section are most often used, for example, profile pipes of 40x20 mm, because they are easier to attach the coating to their smooth flat walls.

For a variety of national economic needs, products are produced in a wide range of sizes. It varies on the configuration and cross-sectional area and, of course, in the thickness of the walls. The combination of sizes determines plastic capabilities. In a professional language, they are called the minimally allowable radius of rounding. So, before you know how to make a blank for a frame, you need to find out how the smallest radius of a flat rounded deformation blank will be able to "survive" without damage.

To determine the minimum allowable bend radius of a square or rectangular profile, we need a height H, because:

products with a profile height up to 20 mm will be brought without a transition to the discharge of an unsuitable marriage if the bending will be made on a plot of 2.5 × H and more;
the pipeline with a profile height of over 20 mm without loss will withstand deformation on a stretch of 3.5 × H and more.

The designated limits are needed to those who have conceived to make racks, shelves and frames for the vents or doors. The wall thickness of the walls contributes to the area of \u200b\u200brestrictions. Wide pipes with thin walls thick up to 2mm do not recommend bending at all. It is better to use welding.

To homemade masters, which decided to make arcs for, it is necessary to take into account that the products used in everyday carbon or low-alloy steel alloys after an application for their efforts have a slightly "spring" property. They, as it were, try to return to the previous state. Consequently, after the beginning of the locksmith will complete the flexibility of all arcs, with his own hands, he will have to repeat the processing and re-fit the arches by the template. It is desirable to initially take into account the value of the plastic torque of WP resistance. It usually indicates the documents of the construction of building materials. The less moment is less, the less comes with fitting.

Methods are bending and their features

Flex a profile pipeline both in cold and hot. Heating with a gas burner will significantly increase the plasticity. However, the material of a small section is excellent and without excess temperature effects, because thin pipes are plastic enough and easier to be applied to them.

There is no accurate indication of the use of heating for flexion. The standards indicate only the size of round rolled steel, according to which the flames on the processed area are needed at Ø 100mm and more. With square and rectangular forms, everything happens somewhat differently. Based on the experience of folk craftsmen:

with a profile height of up to 10 mm, the workpiece is uniquely bent with a cold way;
with a profile height of 40 mm and a more pipe bent with heating.

How simpler and easier at home to bend a profile with a height in the range from 10 to 40mm, the Contractor will have to be addressed independently. If there is a profileger in the master arsenal, you can create an arched rounding without heating. No apparatus, it is better to try your strength in advance. To do this, clamp one end of the material in the vice. On the second end, wear a pipe size more than the height of the profile, and pull the "shoulder" enlarged in this way. If it happened, heated metal products does not make sense.

Option # 1 - Bending with heating

The notable material will deform the hot method, after completing it with sand. So the quality of processing will increase, and the uniformity of the bend is ensured. Broken for work "hot" tarpaulin mittens and proceed:

from trimming of a bar or lane, we will make two pyramidal plugs, the length of which should be 10 times the width of the base. The area of \u200b\u200bthe base of each self-made plug should be almost 2 times more square or a rectangular opening that it has to be stuck;
the programme, as "sit" the plugs, then on one of them we will choose longitudinal grooves from four sides. They are needed for gas output, which will be accumulated when the filler is heated;
pre-impose the workpiece on the segment of the future fold;
prepare filler. As it, take a pure building sand of medium grain. For the absence of bulk building materials, we use the sand from the children's sandbox. I see it first through a sieve with cells 2 or 2.5mm to remove the gravel and grooves. Large inclusions on the surface of the pipes can form an unnecessary relief. Then the sifted mass again "miss", but already through fine sieve with cells 0.7 mm so that the dust particles do not swear when heated. All the filter, as well as the filler upon completion of actions, we will return to the sandbox;
we pump the filler at a temperature of 150ºС;
we beat one end with a wooden plug, on which there are no channels for removal of gases. In the second end, install a funnel. Depending on the size, we establish a blank at an angle or perpendicular to the Earth. Through the funnel, we will pour a filler. Periodically tapping on the walls of the product from below-up-up wooden or rubber Cyans so that the sand seal. A signal about sufficient seal will be a deaf sound;
close the completed workpiece with the second plug;
we note in chalk on the workpiece of the heating section;
secure the workpiece or in the vice with the template, or in the clamp. Material with welded seam is installed so that the place of the welded connection turns out to be on the side. Along the seam is undesirable to stretch or compress;
rassed the noted plot of hot, and gently give the workpiece the necessary form. Bend to one reception by a progressive unwitting movement in a strictly horizontal or vertical plane;
after cooling, compare the result with the template. If everything is in order, knock or burn the plugs and pour sand.

The method described is good for the formation of single angular folds, because Do not heal the pipes several times persistently recommend. Metal from multiple temperature shock loses strength. However, when creating a rounded arch, multiple heating is inevitable. After all, it is unreal, but cooled to a light cherry hue, i.e. Up to 800ºС, the blank may simply break.

Option # 2 - Cold Method

Plastic deformation of the profile rental "on cold" produce, both with filler and without its use. The material with a profile height up to 10 mm does not require filling. A thicker pipe is better filled with sand or rosin. An alternative to the sand filler will serve as a spring of a dense navigation, the dimensions of which will allow it to tightly in the cavity in the processing site. The spring gasket will prevent the sharp change in the cross section of the profile in the bend places.

Bending "Cold" at home can be:

manually using the simplest devices like bending plates, vice and mandrel;
using a mobile profilegility - an improved analogue of manual pipe bending. ProfileGE differs from the device for flexing round pipes only by the form of the recess of the working roller;
by rolling on a homemade or factory profilogram machine, which can be made it with your own hands or purchased in the finished form.

Technical means of mechanization are bending wisely and more profitable to rent, if they are needed for one-time construction of the greenhouse. If in perspective the construction of green houses for relatives and neighbors or the construction of a beautiful metal fence, for example, there is a reason to acquire its own bending installation.

Bending devices and machines

There are representatives of varying degrees of technical complexity in the family of devices and aggregates for flexible. To begin with, consider the funds for those who are puzzled by the issue, as with the help of which the profile tube can be bent without the use of special equipment. Then we turn to homemade rolling settings.

Options of simplest devices

The use of elementary "helpers" for cold deformations regulate the size of the material:

thin pipe racket with a profile height up to 10 mm bent with a horizontal plate with holes. Metal pins, playing the role of stops, rigidly installed in the openings. Flexing the product, placing it between the stops installed in the holes according to the bending radius. Start from the middle of the workpiece and are gradually moving towards the edges. Minuses of the method in the applying of considerable muscle efforts and in rather low deformation accuracy;
pipes with profile height up to 25 mm bent with roller devices working on the principle of the Volnov machine. Metal blank is firmly fixed in vice, and physical force is applied to the treated part through the roller. Bending is made high quality and evenly than in the previous case. But from the artist, by analogy, non-reasonable efforts will be required.

For the formation of bend with a large radius of curvature, type of arched arched frame, fixed rounded patterns with homutics for fixing the workpiece are used. These adaptations to the discharge of plane-parallel plates are. The workpiece with the "stack" in the groove, the dimensions of which are equal to the size of the pipe. Manually flexible with mandrel tube takes the form of a given circuit.

Upgraded bending plate

If the home fitness is not deprived of physical force, the simplest tool for its own needs is useful for its own needs for a rather laborious deformation of the profile tube. It can be performed as a panel attached by clamps to the desktop or to the workbenk. In the case shown in the photo, the bending plate is welded to a metal pedestal, but it is bolted with four bolts to the concrete floor of the workshop. To remove the fixture upon completion of the work, the bolts will suggest. No fastening pins after dismantling remains and does not rise above the surface of the floor, it means that nothing will interfere with the movement and create traumatic threats.

The principle of manufacturing the working plane is extremely simple:

The bending plate serves as a panel carved from thick sheet iron.
The panel is welded to the profile pipe installed through the telescopic rules in the rack of the pedestal.
Two holes for bolts are drilled in the working plane, which are stops.
The radius of bending is adjustable by setting one of the appropriate nozzle bolts.
In order to preserve the coaxiality of segments adjacent to the split, a metal plate fixed by bolts is installed above the workpiece.

Press Multifunctional. His owner has the opportunity to use it as a miniature workbench to perform an impressive amount of plumbing operations.

Mandrel for flexing profile pipe

The method is suitable for products with a height of the wall to 25mm. The master will need a large vestic area and a significant free space around the working area. One edge of the workbench is perforated with frequently located holes for fastening the mandrel and to select the optimal position of the part locking the pipe. The template for the upcoming plastic deformation is cut out of thick plywood. True, the plywood mandrel is suitable only for one-time bending procedures. If the flexure works have to do a lot, the mandrels are better to cook from the steel corner.

Use manual profilegiba

Significant amounts of deformation work need mechanization. Mass production of curved parts takes too much health from the performer. To facilitate bending, it is advisable to make a machine according to the drawing. Apply them mainly for work with large blanks. The main working bodies of the manual aggregate are three rolls, two of which are fixed. Changing the position of the third rolling roll determines the bending angle.

If the methods described above are not acceptable, then the future owner of the greenhouse has two outputs - rent a manual installation or ordering the production of rounded parts. The process of deformation of the workpiece has demonstrated video: how it is easier to bend a profile tube - multiple rolling or physical influence, solve the performer.

When manually, it is important to comply with the rules of flexing profile pipes and do not make sharp movements. It is necessary to monitor the uniformity of deformation from the outer and inside of the rental. However, one should not be too upset due to small folds on the inner surface of the bend: they can be fixed with hammer blows. Before starting work, you need to make patterns from wire, chipboard or hypostertone for reconciliation and obtaining a result that corresponds to the project.

In demand in many spheres of life.

Of these, the designs of various products in industry, construction and everyday life are manufactured. Often, for these purposes, you have to give such pipes bent form with a certain deformation. The fold of profile pipes can be carried out with the help of special machines, called pipe bending.

Without a pipe bender, it is difficult to give the right form. They can be purchased ready-made, produced in industrial conditions, and can be made independently if the need for such a machine occurs periodically for homework. For this, it is important to know how you can make a device yourself for flexing profile products.

Apply two options for flexing profile pipes with their own hands: cold and hot.

Both of them pursue the goal to preserve the integrity of the profile form when flexing the product. For this, in contrast to the external squeezing force under the bending procedure, the internal space of the profile is filled with a certain substance that prevents squeezing.

With a cold method, such a substance is frozen water, and with hot - river sand.

FEATURES OF COLD FIG

Flexing the workpiece using water is usually used in winter with severe frosts. To do this, the profile tube on one side is hermetically closed with a cork plug, and on the other hand filled with water.

The product is left in the frost in a vertical position with a hermetic side down to the total water freezing. After that, the process of flexing the product to the desired radius is carried out.

Hot method of flexion

The basis of the method is the heating of the fragmentation area of \u200b\u200bthe profile product. It can be applied at any time of the year. The pipe from one end is also sealed, closing the cork or any submitted agent.

Then, on the other hand, the river sand falls asleep and close the end of the plug. The length of the length of the plug must exceed the diameter of the pipe about 2 times so that it can withstand the weight of the sand placed in the pipe.

The scene is marked with a chalk or marker and produce its heating. To disrupt the generated gases at the ends of the product, it is desirable to drill small holes.

When the site is heated to the desired temperature, flexing the pipe on the machine corresponding to the parameters of the product.

Important! When flexing the pipe, it is not necessary to allow sparking of metal.

The scheme of the hot method of flexing the profile pipe is shown in Figure:

Features of designs of machine tools for flexion of different profile pipes

Despite the ease of completing the flexible products, it is necessary to take into account their characteristics before proceeding to bending.

Select the design of the device for flexion should be tailored to the size and properties of the profile material. This is due to the fact that products of different diameters and wall thicknesses, as well as made of various metal alloys, have a different critical minimal bend diameter.

Its values \u200b\u200bare specified in special tables in which all parameters of pipes are taken into account. When the profile is flexed below the critical value of the radius, the strength quality of the metal in the bend is significantly reduced.

Table of technical characteristics:

The machine for flexible tube, made with their own hands, can have a different device. Its complexity depends on the parameters of the pipe and its characteristics.

For products with cross-section for up to 2-2.5 cm, you can use the simplest variants of the device using a concrete slab or a cooked template of the planned bending arc.

For cross-sections of the profile of larger, the design of the machine is more complex, it uses a bend method when squeezing the pipe during passage through the rolls on the like rolling mill.

Consider in more detail how to make such devices.

Simplified types of pipe bending

1. Using a concrete slab

To create a design, a concrete slab will be required, a diamond or a winning drill for concrete and metal pins.

The manufacture of the device is carried out like this:

a schematic grid with cells of 4 × 4 cm or 5 × 5 cm is applied to the surface of the concrete slab;
at the place of intersection of grid lines, the recesses intended for metal pins are drilled;
pins inserted into cells are carefully fixed by concrete fill to prevent them from falling under the action of the load from the pipe.

The diagram of such a device is shown in the picture:

The process of flexing the profile is carried out in this way:

The pipe is introduced between two, nearby pins, and with the help of effort bends in the right direction. The bending radius can be changed by moving through the elements of the pins located diagonally.
It is necessary to apply a flexing force to prevent unnecessary profile deformation. To facilitate work, the profile can be subjected to a small heating.
Immediately after deformation, the pipe is not recommended from the device to secure the resulting bend. For the reliability, the combs are temporarily welded to auxiliary steel rod.

2. Using the template

The simplest device for profile products, in demand in the home application, is a method of bending along a predetermined pattern. You can bend not only products from aluminum alloys, but also steel pipes of small sizes.

The pattern is made of wooden boards having a thickness of slightly larger diameter (section size) of the flexible product. For the convenience of work, the template board is cut under the slope towards the table plane. The template itself is fixed on the table with screws.

In addition to him on the working plane of the table at a short distance from the template, the focus is fixed to hold the pipe.

Construction of roller machine

The principle of operation of such a machine is based on rolling the profile pipe through the moving rolls in which it becomes the desired bending under the action of pressure. The movement occurs with the help of two horizontal rollers installed on the base of the chapellor.

The homemade machine can be made by the following details:

three rollers having an axis of rotation for flexion;
profile channel for making frame base frame;
drive chain;
driven mechanism.

The procedure for making the machine must be as follows:

First you need to make a frame frame from a metal chapeller. The frame elements for the frame can be combined with welding, but for reliability, the design is better to fasten with bolts.
Vertically in the center of the horizontal bed, a design is established, having a form in the form of the letter P, upstairs which shaft is mounted with a coupling. In the center of the coupling, the stud is inserted on which the handle is welded, and the roller is installed on the side.
Two cylindrical rolls with rotating rollers are mounted on a horizontal base of the base of the machine at the same distance from the center.
The chain is attached to the rollers to bring the mechanism in motion using a manual drive.

Fastening rolls is carried out by bolts. To do this, the channel dries slots in the channel, allowing the rolls to move to change the adjustment of the bending radius.

Work on such a homemade machine is carried out like this:

the profile tube is inserted into horizontal feed rolls;
the rotation of the handle of the clamp presses the pipe with the third roll. As a result, the profile deformation occurs when passing in this zone.
the initial deforming pressure will change the pipe configuration slightly, so the process of stretching through the rolls must be repeated before obtaining the desired bending.

The radius of the profile bending depends on the distance between the lower cylinders, which can be changed with the help of rollers by moving and fixing with the help of a stopper.