How to cut metal heating pipes. How to cut off the profile pipe across smoothly

A simple way to cut off the pipe with a corner grinder: Master class

Very many who did not encounter difficult work using corner grinding machines (corner grinder) consider working with a corner grinding of elementary. However, in order to learn how to use such a tool, it is not enough to saw off a couple of rods of reinforcement. In fact, this is a whole science with many nuances and rules. In today’s article, it will only be about a small part of such a job. The editors of Housechief invites the reader to figure out how easily it is exactly to saw off the cylindrical (water) or profile (square) pipe from one or another angle.

Normal perpendicular cutting under 90º

Some believe that there is not even a marking, especially if in their hands a large corner grinder with a large cutting disk. However, after, when combining pipes cut off without marking, problems may arise. In order to avoid them, you can use the usual isolet or masking tape, which is glued around the pipe. At the same time, its edges at the start and end point should perfectly coincide. If everything is done correctly, after cutting, two pipes will be combined, forming a perfectly even highway, without unnecessary gaps.

Models and prices

A pipeline for steel pipes has different technical and user characteristics, which ultimately reflects on its price. The table presents a review of some manual models with their parameters and prices.

As you can see, the pricing policy is determined by the functionality of the pipeline, the range of pipes with which it can work, the cut angle and its accuracy.

The simplest pipeline for steel pipes consists of the following elements:

• A cutting video that can be of different types depending on the characteristics of the pipe, which is supposed to be cut.
• Climber for hard fastening the roller to the frame and the case for its placement.
• Rama is the basis in which the video is placed.
• Feed handle. with its help, rotation and cutting of the pipe are performed.

The device is schematically shown in the figure below (in disassembled condition).

A pipeline for steel pipes works using mechanical power rotation force. The pipe is fixed in the frame and fixed with clamps on both sides. The screw begins to rotate, as a result of which a groove forms in the pipe wall, which deepens until the pipe is completely circumcised. At the same time, a screw of pipelines with one video is rotated to a full revolution (360 degrees), and devices with 4 videos are twisted 120 degrees, since each of them cuts off its fragment of the pipe.

IMPORTANT. In some cases, special hacksaws for metal are used to cut pipes. This is especially convenient when you just need to get 2 or more fragments from one product. However, if even the edges and right angles are required (this is especially relevant for the subsequent application of the thread), then the pipeline for steel pipes is the only tool that can perform such work.

How to cut a profile pipe along the length. Cutting technology

If cutting the profile does not cause much difficulties, the longitudinal section necessary for some household chores is more difficult due to its length.

One of the problems during its implementation is the accuracy of the marking, to apply it at the center or at another point of the cutting surface, mark the entire length at the same distance from the side wall, and then connect them with a pencil, marker or Easter egg, using the right angle of the bar, profile from drywall.

To cut the metal profile in the longitudinal direction, the angular grinding machine is directed along the braid of the bevel, gradually cutting out the hole. The method is not very accurate, the tool should be kept without support.

A more convenient way of high.quality longitudinal cutting of the workpiece is the use of auxiliary supports in the form of a metal corner or even direct plates. To do this, the angle is installed on the surface of the workpiece with the help of clamps, and the grinding machine is directed along its side edge, if the length of the corner template is small, it is unscrewed and moved further to a new place, after which the cutting is renewed.

The second method of obtaining a direct longitudinal bevel of a mowing cutting line. This is a rigidly installed grinding machine on a machine or a table in a lateral position. In this case, the processed workpiece moves along the guides leading to the rotating disk of the angular grinding machine (the principle of operation resembles an electric tile knife), the straightness of the resulting mowing line of mowing is determined by the rigidity and length of the supporting elements.

To obtain the specified sizes and configuration of profile pipes in everyday life, cutting is used using an angular grinding machine and inexpensive removable corundum discs. To get a smooth and accurate fishing line for a cutting trimmer, it is better to use support guides or home.made steel templates that set the desired angle.

When installing various structures, it is sometimes necessary to cut the pipe along the length. This work is not as simple as it seems at first glance. In order for the design to be high.quality and reliable, this work must be done smoothly. Only in this case, the welding fishing line for the trimmer will be correct and accurate.

Pipe trimming at right angles

The technology of trimming at right angles is quite simple. You just need to fix the metal part, mark the cut on the cut line, and cut the workpiece directly. The end of the cut part of the pipe should be over the support.

A wide or narrow tape, marker or simple pencil is suitable for applying the cut tag. It will simply be necessary to wrap the product, mark the place of the cut, and make an even incision. When winding, both ends of adhesive tape should be accurately fixed with each other

How to cut a profile pipe along. cutting technology

If the transverse cutting of the profile does not cause special difficulties, then the longitudinal incision that is necessary for some work in the household is more complicated by virtue of its length.

One of the problems when it is carried out is the accuracy of the marking, for its application in the center or at the other point of the cut edge, the marks are placed along the entire length at the same distance from the side wall and then connect them with a pencil, marker or damn, using as a guide a smooth corner, construction building rule, level, profile from drywall.

In order to cut the metal profile in the longitudinal direction, they lead an angle grinding machine along the line, gradually cutting out a through hole. the method is not too accurate, the tool has to be kept without support.

A more convenient way to cut the workpiece with a qualitatively longitudinal way. the use of auxiliary supports in the form of a metal corner or even straight plates. To do this, the corner is attached to the surface of the workpiece with the help of clamps and lead a corner grinder along its side edge, if the length of the template corner is small, it is unscrewed and rearranged further to a new place, after which the cutting is resumed.

The second method of obtaining a flat longitudinal cut line is a rigidly fixed corner grinder on a machine or a table in a lateral position. The cut.out workpiece is moved along the guides, leading to the rotating disk of an angle grinding machine (the principle of operation resembles an electric tile cut), the straightness of the resulting line is determined by the stiffness and length of the support elements.

To obtain the specified sizes and configurations of profile pipes in the household, circumcision is used using an angle grinding machine and inexpensive cutting corundum discs. To get a flat and accurate fishing line for a cutting trimmer, it is better to use support guides or home.made steel templates that set the desired angle.

Rules for cutting pipes from different metal

Corner grinder even in the hands of the master is a rather dangerous tool. When working with it, the precautions should be observed, and be as concentrated as possible. Otherwise, you can not only damage metal blanks, but also injure yourself.

Know how to correctly cut the pipe under 45 degrees with a corner grinder, each specialist in working with metal should. The circle of the disk should be installed by the pattern up, and clamped by a special nut. Different metal pipes are cut in compliance with some rules.

Work with aluminum blanks

Aluminum belongs to soft types of metal, so another type of disk is used to cut the corner grinder. When working with soft metals, such as aluminum or copper, it is impossible to make a cut at a time. The cutting disk is simply knitted in the material.

A special disk is performed very carefully. The same slic should go through several times.

How to cut cast iron pipes

Cast iron is characterized by increased strength, but at the same time it is a fairly fragile material. For sawing pipes from cast iron, it is recommended to use disks with diamond spraying. You can cut the fragile material with a corner grinder only in a straight line.

Important! It is necessary to carry out work with sawing cast iron, steel, and aluminum is necessary only with the use of personal protective equipment (in a respirator, in protective glasses and gloves). During the cutting process, a large amount of dust is formed.

Cutting pipes of large dimensions

Corner grinder is often used to cut large diameter pipes. Large.sized metal products have thicker walls and large weight. To work with large metal blanks, it is more convenient to choose large drives.

Heavy unbearable products are required to be firmly installed on low supports or on a flat surface, so that when cutting the final site they will not change their position.

When working with large pipes, you should choose the correct direction of rotation of the circle of the corner grinder disk. Otherwise, the tool is difficult to keep in a fixed position, and the disk grows too quickly.

Features of cutting thin.walled pipes

Sawing thin.walled metal rolling has its own characteristics. When cutting these products, there is a large risk of crushing edges at the rolls of cuts. To prevent this, experts recommend filling the pipes from the inside.

A wooden stick of suitable diameter or sand may come as a filler. For a thin.walled profile, when cutting a corner grinder, thin cutting discs are selected. Work with such material is carried out much faster.

Methods of cutting by thermal exposure to metal

The advantage of thermal cutting in comparison with the mechanical is, first of all, in higher performance, as well as in a very low energy consumption.

Gas cutting pipes. Most often, large diameter pipes are cut, as well as sheet metal, using gas cutters of various types.

Good to know! When the fuel enriched with oxygen is combined (it may be vapors of kerosene, acetylene, propane) metal melts and removes from the place of cutting with a stream of gas.

In addition to the above advantages, the advantages of this technology include a low cost of work.

If high.diameter pipes are laid, the use of manual equipment is impractical. Therefore, in this case, mechanized units are used, which can be equipped with several cutting heads. Such a technical solution helps to obtain a cut of high accuracy while increasing the speed of the procedure under consideration. In addition, the edge of the pipe during manual cutting is not formed even and smooth. The use of a semi.automatic machine provides an opportunity to immediately get a high quality result.

In the factory, pipe cutting with plasma welding is used

Plasma cutting of pipes. This technology is also one of the methods of thermal cutting. The temperature that allows melting the metal is produced by the stream of a substance that is in the plasma state. Plasma.forming substance is ordinary air. It acquires a high temperature as a result of ionization, which occurs with the continuous effect of an electric discharge.

You can cut pipes using plasma manually, as well as using semi.automatic (or automatic) installations. The latter option is preferable, since it turns out a higher cut quality.

Cutting with laser machines. Such units belong to the category of modern automated systems. Their difference is a wide range of tasks solved during one operation. These include drilling, cutting, milling, processing of edges.

Using laser machines, you can process pipes with the following parameters:

• Maximum wall thickness: aluminum. 4 mm; stainless steel. 5 mm; Black steel. 6.4 mm;
• maximum length. 6.5 meters;
• External diameter (maximum). 150 mm.

Cutting a profile pipe

The above methods are suitable for working with profile pipes. But there is one nuance regarding their cutting at an angle of 45 °. If you make a manually marking, errors may occur, due to which, during the assembly of the pipeline, its elements simply will not dock. To exclude this problem, professionals recommend making the same profile out of the segment, but with a large section, a template.

For cutting profile pipes, you can use the same tools as for ordinary round

It is not difficult to make such a template:

• Measure with an angler on a small segment of the pipe angle of 45 °.
• Using a machine with a corner grinder, make a cut, after which the edges of the workpiece are sanded.
• Then insert a profile pipe into a finished template with a smaller diameter of the described circle.
• Focusing on a do.it.yourself angler, make markings using the devil.
• On it and make a cut with a corner grinder.
• At the final stage, polish the edges.

Advice! Do it very carefully. Otherwise you can get hurt about the burrs.

Pipe cutter for copper pipes

To choose the right pipeline for copper pipes, you need to understand their types. When making the choice of the device model you need to take into account not only the pipe material, but also how thick the walls have.

Curlar devices

They perform clean sections, and overcome a pipe with a diameter of up to 100mm. In the clip, steel (high strength) disks-prunes are fixed in the clip. If necessary, then the position of these disks can be changed.

Roller manual

Manual roller pipe cutter for copper pipes is the simplest tool. It is often applied to copper products, as well as steel and aluminum.

The incision with a manual roller model is performed by turning the device around the workpiece, and with a suspension of the clamping nut.

Roller hand tube is convenient for action in space with restrictions, when the steel pipeline has already been mounted.

When replacing several guide rollers with cutting, a full revolution around the workpiece does not need to be done. There is enough incomplete turning at an angle of 30 degrees with a pipe press. The result is a clean slice.

Quickly functioning roller manual models have a rapid installation and wiring mechanism. This accelerates the operations that are carried out with pipes.

Quick.acting models are used to cut pipes made of copper with diameters from 6 to 170 mm. In order to cut the workpiece, you need to perform a couple of full revolutions around it. Then the spring return makes it possible to free the workpiece without delay and continue to mount it.

And for large sizes of diameter up to 915 mm, rotary rotary devices are used.

It sets from one to three cutting videos. The more of them, the more significant the diameter it can cut. A large minus of a hand.made instrument is the appearance of burrs in the place where the cut was performed.

To cut the blanks, a multi.faced or clamp pipeline is used with a diameter of not more than 75 mm. These tools are very convenient for their large scale handle.

Features of work with copper pipes

Pipe cutters are rarely used to cut copper pipes. often for this purpose, electrical. This is due to the properties of this material. Using electric models, you can cut tubes from various varieties of copper.

IMPORTANT! The copper pipe is thin, and at high pressure it breaks and rises. For such work, it is necessary to choose a suitable tool.

The most common option for copper pipes is a roller pipe cutter. There are universal roller options that can cut steel, plastic and copper samples. And there are models that are designed only for pipes made of copper and aluminum.

Electric pipeline for copper pipes. This option is more expensive. Because the principle of functioning of the device is the high performance of the engine, which drives parts for cutting.

The engine with 500 UP/min, and at such a speed, it quickly cuts the desired workpiece. For example, the diameter of 12mm is cut by such a tool in 3 seconds.

In addition to the already described advantages of an electrical tool, there is also. this is an auto size. It allows you to cut the installed pipes, with a gap approximately 35 mm from the wall.

Another feature becomes no less important. This is work with different diameters of copper products (from 12 to 35mm).

The electric pipeline works both from the battery and the network. It is very convenient and reliable in working with copper samples.

Distinctive features

Any special device for cutting pipe from metals is designed more for professional than everyday use. In domestic conditions for cutting pipes, hand hacksaws for metal or angular grinding machines (corner grinders) are often used, which, due to their democratic value, are present in a set of tools in any owner who preferred homework with their own hands.

Unlike angular grinding machines or hacksaws for metal, the pipeline has the following features:

• The main advantage of any pipeline due to its constructive performance is the ability to cut the workpiece strictly at an angle of 90 degrees to its axis.

To do this, the pipe is laid on a semicircular platform and is pressed against it with a cutting element. The second option. the device moves along the tube shell strictly along one line thanks to the structure of the case with an extended support site.

• Almost all pipes cut by hand pipelines have an external chamfer. this is very convenient for further cutting threads on them, welding with other sections of the pipeline line.
• Manual models allow for rifling work with pipelines in the absence of electricity. In this case, they cannot compete with the quality of the cut and speed household hacksaws for metal.
• Professional electrical cutters for pipes of large diameters are able to cut products with high quality and significant wall thickness, which is unattainable when using a manual tool.
• Most of the brands of expensive pipelines are designed to cut pipes from different materials, the configuration includes or you can buy separately corresponding roller or disk cutters.
• The disadvantages of roller varieties include the appearance after cutting of the grath. an acute bent edge on the inner pipe wall that reduces its passage section. To combat this defect, some modifications have built.in grades.

Classification of pipelines for steel pipes

Since pipelines are used in various areas, starting from industrial laying of engineering pipeline communications and enduring household needs, their assortment is quite wide. The design of the tool is directly related to the weight and overall dimensions of the trimmed pipes. their diameter and wall thickness.

By type of drive

There are several types of pipelines for metals depending on the drive mechanism:

Manual. This is usually a tool of small overall dimensions that allows you to install pipelines with cutting its fragments in the absence of electricity. This type is often used by plumbers in the construction sector when laying communications or dismantling metal pipes. The main cutting part of manual pipelines is one or more of small diameter videos.

Another variety of mechanical devices with manual supply of the cutter is rotary installations for cutting bulky tube products.

With electric drive. Electric devices are the main when pruning products for various types of industrial pipelines of large diameters. Typically, the device has a semicircular platform on which the pipe is laid, during the cut process it rotates on a platform built into the platform or additional support for the roller mechanism. Pruning in an electrical device is carried out using a disk on the metal of the corresponding diameter.

It is clear that the electric drive allows you to cut blanks with high speed, cut quality and any overall size.

With a hydraulic drive. Rarely encountered on the pipeline tool market, a cut is produced for metal disk with a design similar to manual roller devices, the method of pushing the shell with an acute edge. The disk is driven by a hydraulic pump, the cut is obtained with the finished chamfer on the upper edge for the river roll, welding.

With pneumatic drive. Also, a rather rare type of pipeline used for professional cutting of pipes with wall thickness up to 60 mm from a wide row of materials (plate cast iron, steel, ceramics, concrete, asbestos cement, PVC polyvinyl chloride and low pressure polyethylene). The diameter of the pipelines can reach up to 1300 mm, the main working element of the installation is a disk for different materials, which is pressed to the pipe surface using a pneumatic drive.

A distinctive feature of the pneumatic pipeline is the absence of a bulky electric motor with external air supply by a pressure sleeve. This allows you to cut large.sized products without their rotation around its axis. the pipeline mechanism is attached to the shell with chains and itself makes a revolution on the cut.out part.

Faccoster for metal pipes. purpose, application, types. It will be interesting to know about a special tool for processing the edges of steel pipes. Types where installation and processing options, as well as popular models and manufacturers.

By type of cutting element

There are several varieties of cutting elements of pipelines for steel pipes, the main of them:

Rollers. Roller pipelines, one or more executive elements of which are made of wear.resistant high.strength steel, mainly designed for manual cuts. With their help, the pipes of large sizes are cut into the circle, but with a limited wall thickness, while receiving the outer chamfer.

Typically, the rollers are located in the case of the device, there is also a different type of pipeline with the location of many cutting elements between the links of the chain (chain views).

Disks. Large diameter disks cut pipes in all electrical pipelines by analogy with the operation of an angle grinding machine. Since discs can be changed depending on the processed material, electrical pipes of any kind, as well as products from polymeric materials, concrete, asbestos.cement, ceramics, can be cut with electrical appliances. In high.performance industrial units, water cooling of the discs is often used.

Incisors. The cutting method method using incisors is similar to working on a lathe. the workpiece is clamped in a rotating spindle and the cutter is gradually brought to it until the shell is completely cut through. Technology is used in the industrial sphere for trimming small diameters.

The second type of tool with incisors is planetary ring.shaped devices rotating around the processed part.

Saws. Sable electric saws are a universal tool for cutting pipes from any materials, sometimes for the convenience of working in their kit includes a chain that fixes the tool on the tube membrane. With a saber saw, you can cut the pipeline in hard.to.reach places, another significant advantage is the possibility of cutting several products at once. To do this, they are obligated by a chain, fixing the saw case in a fixed position, and turn on the tool, producing simultaneous cutting of blanks.

In the industrial sphere, methods of cutting steel pipes are also used using thermal effects on the shell with laser rays or combustible gases (plasma cutting).

The tools used

Pipe cutting. the operation is quite simple, but the correct cutting of the pipes, when the cut is located exactly at right angles to the surface of the product. the procedure is responsible. And if you have to cut the details of the engineering system from a different angle, then the experienced builder (I will modestly keep silent about myself) can not do.

At the same time, I’m not talking about cutting large diameter pipes. Indeed, in this case, to ensure proper welding or gluing, it is necessary to observe an angle of 90 degrees.

For any cutting operation, there is special equipment. It is about him that I want to talk at first.

For individual use

This category of tools is used in private and small commercial construction for the arrangement of pipeline systems (water supply, heating, sewage, ventilation) of a small diameter.

Personally, in my practice, I used the following devices:

Pipe scissors allow you to make a cut quickly and correctly.

To provide the necessary force, the devices are equipped with a gear mechanism. Before cutting a metal.plastic pipe (or a product made of polypropylene), it must be placed on a special shelf. The peculiarity of the design of the secateur will not allow you to install the part crookedly, so the incision will always be made at right angles to the surface.

The price of such products starts from 10 and can reach 100. Depends on the manufacturer, material, size and so on.

• Disk pipeline. A device for cutting pipes in which the cutting part is made in the form of a disk of very durable material with sharpened edges. It is pressed against the pipe wall with a lever and stretches throughout the circumference.

Large diameter pipes are cut by a disk pipeline.

I use the disk pipeline for cutting PVC pipes from which internal and external sewage is constructed. It is impossible to use it for metalloplasty, since the thin.walled material will doubt it from the attached effort.

• Guillotine. Features of the design and the principle of operation of this device for cutting, you can imagine if you have seen the tool of execution used in medieval France.

Guillotine with a screw for even pipe cutting.

A knife is located on top, which is lowered along the guides to the pipe located below. Most often I used such a device for cutting a large number of pipes and the unit was equipped with an electric drive. However, there are models with a screw on sale.

• Kryazuvka for metal. Suitable for cutting the necessary segments of pipes from any materials. My grandfather taught me how to use it. This is a special secret to attach a strictly dosed effort, otherwise the canvas will break.

Kryzuvka for metal. the simplest tool for cutting pipes from any materials.

After the cut is performed with a hacksaw, burrs are formed at the pipe end. They need to get rid of a shaver or file. Otherwise, the connection of the pipes can be leaky.

• angle grinder. It is, if anyone does not know, about a regular corner grind. A special cutting disk is placed on it, after which you can cut pipes of both small and large diameter.

Corner grinder in skillful hands turns into an effective pipeline.

As in the case of a hacksaw, a corner grinder can be worked with any material: from plastic to metal and cast iron.

• Electric. This tool can also cut pipes, but even with me, a person with considerable experience, to make a cut at a right angle far from always.

The jigsaw also cuts the pipes, but is it exactly?

Therefore, you do not need to clog nails with a microscope, there are simpler cutting methods.

But first I want to tell you about professional equipment that cut pipes at industrial enterprises and when laying main water transport communications.

For industrial use

With local and individual engineering systems, we kind of figured out, but the question remains how to cut a large diameter pipe evenly. In this case, special equipment (often stationary) comes to the rescue, with which professional builders work.

I once worked as a master of ZhEK, so I had to deal with such units. I’ll tell you about the most interesting:

• Lathes. These units produce any processing of round parts of pipelines, including those used to transport aggressive liquids.

The maximum size of the processed pipes depends on the cross section of the spindle holes and the distance between the fasteners. In addition to banal cutting, turning machines can remove chamfers, cut pipes and perform other operations, including in automatic mode.

• Tape machines for cutting. Used to cut sewer and water pipes of large diameter, which are already laid in trenches (or placed in buildings).

Cutting pipes laid in the ground.

Cutting technology

I must say right away that if you are going to make a water supply system or a heating system of polypropylene or metal.plastic, it is better to immediately buy a secateur. It is inexpensively, but greatly facilitates the work.

In all other cases, you can also use improvised means

At right angles

To cut the pipe at an angle of 90 degrees, before the directly sharp, I propose to apply markup. To do this, you do not need a marker or pencil, as you might think, but a piece of paper or a painting tape. I prefer the last option, as it sticks to the surface.

• Then, focusing on the marks, I glue the tape. It is important to do everything so that the edges of the paper tape come together with maximum accuracy. If you succeed, then you can be sure that the cut will be made correctly.

Instead of adhesive tape, you can use the pipe wrap tape.

Before a sharp pipe, you need to carefully fix.

So that the cutting disk does not hold during the operation, the second end of the pipe must be left by weight, and the incision start from the upper part of the pipe.

• After that it remains to make a cut using an angular grinder. It is imperative to ensure that the cutting disk passes exactly along the edge of the painting tape, which you pasted earlier.

If the pipe has a large diameter, you need to cut the wall itself on individual sectors, gradually turning the pipe with the right side.

Large diameter pipes are cut into sectors.

A little differently you need to do with a cast-iron pipe, which, when cutting, can split. In this case, I personally act like this:

• I carry out the incision of the product throughout the diameter;
• Then I take a chisel and tapping the section;
• From such an effect, the product should burst along the depression made by the disk.

A oblique section

Now I’ll tell you how to cut the pipe under 45 degrees. In this case, you can also use the cost.

• I take a square sheet of paper (the side of the square should be equal to the outer diameter of the pipe);
• I put it diagonally;
• I turn around the pipe and fix it.

Cutting the cut line using a sheet of paper folded diagonally.

In this case, if you make a cut along the oblique edge of the paper sheet, the end will have an angle of 45 degrees.

Another simple way to mark the marking is to lower the pipe at the right angle in a bucket of water. In this case, the wet border will serve as a guide for cutting.

But it is best not to make up sly, but to use the usual knock, which is precisely for such cases and is intended. Structurally mentioned by me, the device has the form of an inverted letter P, the opposite strips of which have cuts from the right angle.

The pipe needs to be put inside and cut at the right angle, placing the canvas of the hacksaw in the corresponding grooves.