Cutting profile pipe at an angle
How to cut a cast iron pipe
Cast iron as a material has its own specifics and differs from steel alloys in a number of physical and mechanical characteristics. With high strength, cast iron is a very fragile material.
A cast iron pipe is marked in the same way as a steel pipe. Before starting work, wooden blocks should be placed for support. An angle grinder with a cut-off wheel needs to make a shallow cut around the entire circumference. Next, a chisel inserted into the incision must be hit with great force. The product will split straight along the cut line.
Cutting a cast iron pipe
If an angle grinder is not available, you will have to make a circular cut with a hacksaw for metal.
Types of pipe cutters are classified depending on the objects to be cut and the characteristics of the cutting element. Accordingly, the following types of tools are distinguished:
- The cutter cuts pipes up to 100 mm in diameter. Suitable not only for steel but also for plastic pipes, Has multiple steel discs.
The chain chain differs in that it can cut pipes made of dense materials (cast iron, concrete, ceramics), since it has a mechanism for tightly fixing the cutting object, made on the basis of a regular chain and pivoting levers.
What you need to work
To make a tool yourself, you need a small set of tools and materials:
- set of wrenches;
- hacksaw for metal work;
- square wire rod;
- hacksaw blades.
Also, in the work you will need a bolt and screws of special sizes, which depend on the parameters of the device itself. Metal rivets are selected in regular sizes (diameter 0.4 cm).
The sequence of work is associated with the stages of manufacturing the left (1), right half (3) of the tool and their assembly. An example drawing is shown below.
Number 2 denotes blade trims, 4. clamping screw. Dimensions are in millimeters and can be proportionally recalculated for your specific model.
Making a pipe cutter with your own hands
If for some reason it is not possible to purchase a professional device, then it is quite possible to make it with your own hands from ordinary materials available to almost everyone. The advantages of this option are as follows:
In addition to mechanical, thermal methods for cutting pipes are widely used. Here, the tool is a gas torch (propane or acetylene) or an electric arc welder. Even the thickest large diameter pipes are subject to the torch. The performance is also quite high. In addition, only these methods provide exceptional mobility. you can cut the pipe in a trench, basement. in places where a high-performance stationary machine simply cannot be dragged and connected.
It should be noted that thermal methods do not allow achieving high accuracy, and it is also not always possible to cut off exactly. However, in a number of applications, such as operational repair of heating mains or main pipelines, it is not required. After a thermal cut, the resulting edges have to be additionally processed with mechanical tools, the cut line should be leveled and the bevels should be removed to the design values.
Plasma cutting of pipes
The thermal cutting method is also used when working with polymer tubular products. In thermal guillotines, the cut is carried out by an oblique thin cutter heated to a high temperature, sliding in guides.
Devices can also cut at an angle and very smooth, but are only suitable for working with soft materials that have a low melting point.
2 Smooth Cutting Tricks (90 Degree) Angle Grinder for Profile and Round Tube
How to cut along
Another frequently asked question is how to cut the angle grinder pipe straight lengthwise. Here the algorithm of actions will be approximately the same as for cross-cutting
It is important to pay attention to the marking. You can, for example, use a painter’s thread, which is usually used when marking walls. In this case, it is necessary to rigidly fix the pipe
The sawing process itself must be done carefully and slowly, since when sawing long elements, there is a high probability of the cutting disc slipping off the mowing line of the marking
In this case, it is necessary to rigidly fix the pipe. The sawing process itself must be done carefully and slowly, since when sawing long elements, there is a high probability of the cutting disc slipping off the mowing line of the marking.
Precision cutting machines
Band saws are distinguished by high stability of the blade plane and cutting accuracy. They are also widely used in the procurement areas of small-scale and medium-scale production. They are characterized by versatility, reliability and high performance.
For private use, the Italian company MASS offers a compact band sawing unit. It is equipped with a manual clamping device and can evenly cut pipes with a diameter of up to 65 mm, as well as rolled products of any profile of the same thickness.
The rotary device allows you to set an arbitrary cutting direction from 0 to 45 °. Cutting blade movement frequency. up to 45 strokes per minute. An economical 370 watt motor allows you to use a regular home single-phase 220 V power grid.
The pneumatic pipe cutter is powered by rarefied air pressure. This device is used in production for cutting pipes with a very large diameter (up to 1500 mm). At the same time, it copes well with cutting dense material (cast iron) and light plastic.
Orbital pipe cutters are designed not only for mechanical cutting of pipes, but also for chamfering from thin-walled pipes. For this, they are equipped with special chamfering cutters.
Often, add-ons are offered to different types of pipe cutters that allow you to provide the safest conditions for working with pipes. So, with the help of the fast swaging mechanism, large pipes can be quickly fixed in the device without the use of a special screw. Also, the pipe cutter can be equipped with additional removable cutting elements oriented to pipes of various thicknesses, and rollers that move the device around the pipe.
Using a miter box
The construction miter box allows you to correctly cut the professional pipe at any angle. The device is applied in the following order:
- the profile pipe is fixed inside the device and aligned at a certain angle;
- a preliminary cut is made using the built-in hacksaw;
Miter cuts with a miter box
- the pipe is removed from the miter box and cut through the workpiece by an angle grinder. In this situation, the cutting place will be highlighted and the risk of error is reduced to zero.
The finished measuring tool has a high cost. To reduce financial costs when performing construction work, you can make an analogue of the miter box yourself. For this, a wooden frame is made with a niche for pipes and with the help of measuring tools, notches are made at different angles.
DIY miter box for cutting a professional pipe
What other ways can you use to cut profile pipes at an angle, see the video.
How to cut a profile pipe
Profile pipes are widely used in everyday life. The material is used for the construction of greenhouse complexes, benches, tables and other garden furniture, awnings, swings and other small architectural forms. It is for this reason that it is important to know how to correctly cut a profile pipe at an angle of 45 degrees, 90 ° and so on, as well as along.
How to cut a professional pipe angle grinder
The most popular household cutting method is the use of an angle grinder. How to cut an angle grinder straight into a profile pipe? The main problem with getting the job done is correct markup.
For marking, you can use:
- tape measure, square, marker (pencil), building level. The simplest tools allow you to accurately mark the cutting angle, but during the work, the angle grinder may deviate from the specified mowing line (the equipment does not rest on stands, but is suspended, that is, in the hands of the master), which will lead to an error. For this reason, this method is rarely used;
Cutting with an angle square
- paper pattern;
- miter box.
Using a paper pattern
The simplest device for correct cutting at an angle, for example, for making a greenhouse, is a template made of thick paper.
To make a cut at right angles (90 °), you must:
- wrap the pipe with a thick sheet of paper and achieve full alignment of the edges;
- fix the sheet in this position;
- cut the profile tube along the edge of the paper.
Pipe cut at right angles
To cut a pipe at an angle of 45 °, it is necessary to fold a sheet of paper in half (along the hypotenuse) and wrap the pipe so as to combine the sharp ends of the resulting triangle.
Curve for cutting off at an angle of 45 °
Automatic production of a paper pattern by a computer program
Pipe cutting methods
To cut a profile pipe, including at a certain angle, you can use the following tool:
- angle grinder. angle grinder (picture above). This method is most often used for domestic purposes, as it is characterized by simplicity and availability of equipment;
- hacksaw for metal. Using a hacksaw is not difficult, but the process of doing the work is quite laborious;
The use of a hacksaw for metal for cutting pipe
Idea Profile Pipe cutting and welding
- electric jigsaw. To cut metal, you will need to purchase a special diamond-coated file. The work is done quickly enough;
Cutting professional pipes with a jigsaw
- special machine for cutting pipes. The equipment is most often used by professionals because of its high cost. Currently, specialists use two types of machines:
- equipment with mechanical cutting, which is performed with a cut-off wheel or a special file;
- equipment with a laser. Laser cutting is more accurate than mechanical counterparts.
Using a dedicated laser cutting machine
When choosing any method, it is important to pay special attention to safety precautions. During the cutting of the pipe, metal shavings are formed, which can damage the hands and eyes of the master, therefore, it is important to wear gloves and safety glasses before performing the work.
Features of cutting pipes along
With the help of an angle grinder, you can make not only a transverse, but also a longitudinal cut of a profile pipe. How to cut a multi-profile pipe lengthwise? The work is done in the following order:
- as with cross cuts, work begins with marking. It is important to determine as many anchor points as possible on the lateral surface of the pipe in order to get the most even line;
Marking for longitudinal cuts
- to improve visibility and eliminate the possibility of getting an uneven cut, it is recommended to highlight the resulting line (with paint or masking tape);
- the pipe is fixed, for example, with clamps. If possible, you can fix the angle grinder, as an option. using a special stand;
- the cut is gradually made along the specified mowing line.
Pipe cutting along an angle grinder fixed on a rack
A similar technology is used to cut thick-walled shaped pipes. Before performing the work, it is required to fix the pipe, which excludes the possibility of the workpiece breaking under its own weight.
How to mark the place of the cut at 45º on the profile pipe
Some “experts” argue that with a square cross-section, which has a profile pipe, you can make markings for a cut at 45º using an ordinary tape measure. HouseChief editors do not advise the reader to do this, unless it is planned to spoil the material. The fact is that when measuring with a tape measure, it is very difficult to do such a job perfectly. But the school ruler in the shape of an equilateral triangle will come in handy here.
To begin with, a straight strip is outlined on one of the faces, perpendicular to the side of the pipe. Further, the product is turned, and an oblique marking is applied to the adjacent face, going from the edge of the first strip at an angle of 45º. You don’t need to measure anything here, everything has already been done by the manufacturer of the triangular ruler. After that, the profile tube is turned again and a perpendicular is drawn. Now all that remains is to connect the beginning and end of the mowing line on the fourth edge diagonally. That’s it, you can safely work with an angle grinder. such cuts will ideally be joined at a 90 ° right angle. For the convenience of work, you can glue masking tape along the edge of the strip. This will add clarity and make it easier to cut directly on the line.
For the convenience of marking, if you have time, you can weld such a template
Industrial models (for example BSM)
There are dedicated industrial machines for precise bevel cutting operations. A good example: devices manufactured under the BSM brand. The machine tool is manufactured by the German company Rexinger.
True, the BSM series machines are designed exclusively for working with polypropylene pipes of sufficiently large diameters. Supports processing of PP, PVC, PE, PVDF products.
The cutting tool of the machine is a band saw, thanks to which a cut is made at angles from 0 to 67.5º. The precision of the process is ensured by a laser cut recognition.
Despite the configuration of the device for products of large diameters, a special table can be used, with the help of which pipes of small diameters (50. 200 mm) can also be successfully cut, which are easier to cut with a pipe cutter. A wide range of BSM devices is produced.
Do not think that an angle grinder with a cutting disc is a tool used exclusively for dismantling metal structures and does not require accuracy in work. Rather, the opposite is true. The angle grinder requires the utmost concentration of attention and accuracy in work. This is a rather traumatic tool, and therefore, when working with it, one should not forget not only about the correct marking, but also about the safety requirements.
HouseChief hopes that the methods described in today’s article will help novice craftsmen in performing various repairs. All questions that have arisen during the reading process can be asked in the comments below. In the same place, please describe your experience in cutting pipes, which may be useful to other readers.
Finally, we suggest watching a short video that will tell you a little more about the working methods of the angle grinder.
Pipes are a widespread building material. They are used in the installation of various systems. During the installation process, there are situations when the pipes must be joined at an angle. The technology for the production of such works is not standard, but you need to know about it.
To create complex joint configurations, bevel cutting of pipes is required. We will tell you how such operations are performed and what cutting methods exist.
In addition to mechanical methods, thermal methods are often used, where welding or cutting machines work as a tool. For example, an autogenous gas torch or conventional welding machine (AC / DC).
With the help of such devices, thick-walled metal pipes are available for cutting. However, it is extremely difficult to obtain a perfectly smooth high-quality cut using the electric welding or gas autogen method.
Cutting technology using electric welding and autogenous cutting is widespread. The technique does not provide high cutting accuracy, but when installing pipes, this factor is often not decisive
Usually, after cutting by a thermal method, the products are subjected to additional processing. The cut line is leveled, the values of the required angle are adjusted. This approach is economically unprofitable, since it is accompanied by additional costs for machining.
As a rule, a thermal cutting technique is used in the conditions of an industrial-production sphere. True, housing and communal services also often resort to this technique.
Thermal cut is also used for working with plastic material. There are devices. thermal guillotines. The sharp thin blade of such devices is heated to a high temperature, after which a cut is performed.
Thermal guillotines support bevel cutting, and this is their advantage. However, for work with more rigid materials than PVC, wood, chipboards, these devices cannot be used.
To cut metal-plastic pipes, pipe cutters are needed that can evenly divide products with a multilayer structure into parts. The article recommended by us is devoted to their varieties and methods of application.
Marking and cutting circular pipes
When cutting round pipes at an angle of 45 degrees, the tool made for rectangular pipes is not quite suitable. For a more accurate. streamlined drawing of the mowing line of the cut at an angle, it is recommended to use a paper template, which is wound around the workpiece.
Patterns are developed in the modern world using computer programs.
the cutting line changes depending on the angle and diameter of the pipe set in the program. Common patterns can be found on the Internet or remember our painted rulers from the school bench.
Many people who have not come across complex work using angle grinders (angle grinder) consider working with an angle grinder elementary. However, in order to learn how to use such a tool, it is not enough to saw off a couple of reinforcement rods. In fact, this is a whole science with many nuances and rules. In today’s article, we will only talk about a small part of such work. The HouseChief editorial board invites the reader to figure out how to easily cut off a cylindrical (plumbing) or profile (square) pipe at one angle or another.
Read in the article
The nuances of working with a rectangular section
To perform cutting of products of rectangular cross-section, it is recommended to prepare template cuts of the corners in advance. They are easy to make from a metal corner, having previously marked with the same protractor.
Marking can be done at different angles. To use a template in business, it is enough to attach it to a rectangular pipe in the right place and mark the cutting line. Then, with any suitable tool, cut along the intended mowing line.
How to cut a profile pipe at an angle of 45
In various situations, household-level craftsmen often come to the issue of correct marking for accurate cutting of pipe blanks at an angle of 45 degrees. Today there is a huge selection of tools, both for the domestic and industrial process of cutting pipes at any angle. The cost of such devices can be quite high.
It is proposed to consider methods of marking workpieces for cutting at an angle of 45 degrees in a domestic environment without the use of expensive professional equipment.
Cutting profile pipe at an angle
Cutting the pipe at an angle. a typical task in the manufacture of metal structures. There is often a need to cut the pipe at an angle. The cut pipes are welded at a predetermined angle to the walls of the structures, from which two-link bends are made.
Before cutting, using patterns (templates) applied to the pipe, outline the cutting line. For each diameter and each angle of the selected diameter, a separate unique piece (template) is required. The proposed Excel table allows you to obtain dimensions for constructing a pattern for marking pipes of any diameter, cut at any angle. Enter in the yellow cells of the table the outer diameter of the pipe, the cutting angle, the length of the segment and you will instantly receive the ordinates and abscissas of these points.
Transfer these points to paronite or cardboard and smoothly connect them together. The pattern (template) is ready. For the convenience of manual construction, the user himself enters the length of the segment on the X axis (multiples of 5, 10 mm) and receives up to 40 construction points, depending on the length of the segment and the length of the piece. You should get a curve like this.
When using a table with a macro, there is no need for manual construction. The program itself draws a sweep based on the entered data. It remains to print and cut it. The allowances on the printout are added by the user.
When making a knee, the cutting angle should be equal to half of the knee angle.
An example of determining a cutting angle for making a 135 degree elbow (9045). Not to be confused with a sharp 45 degree knee! Formula: 135/2 = 67.5. We cut the pipe at an angle of 67.5 degrees, we get two pieces of pipe with cutting angles of 67.5 degrees, we connect them along the mowing line of the cut with reference to a common generatrix, we weld and get a knee (67.567.5) at 135 degrees.
The Gostovsky pipe diameter was specified correctly, and the pattern is shorter. In my opinion, this error is caused by the fact that it is impossible to press the piece tightly against the pipe and the outer diameter of the pipe has increased (rust, dirt). I had to measure the circumference with a “belt” and divide by π (3.1416). Enter the resulting diameter into the table.
Watch the demo
(Pictures, descriptions, formulas were taken from the book by I.Kh. Brodyansky “Marking of welded fittings of pipelines”, 1963)
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