ways to cut metal pipes
A frequent example of this situation is the need to cut a metal pipe at a 45 degree angle. Such cutting of the material is often required when laying plumbing or heating systems. In this case we have to deal with steel pipes.
The usual cylindrical pipes are usually used for this purpose. If we are talking about the installation of some metal structures, more often used profile pipes of rectangular or square cross section.
The main problem here is that in order for the joined elements to coincide, the cut must be as even as possible, which means that particularly close attention must be paid to the marking of the material.
In the case where cutting at an angle is required, a simple square sheet of paper can be used as a marking template. It should be folded strictly diagonally, and then wrap the template pipe.
In doing so, it is necessary to carefully ensure that the side of the sheet, which is located closer to the end of the pipe, is perpendicular to its central axis. Next, using the marking material is applied a series of dotted lines, and after the marking is made around the circumference of the template can be removed.
A photo of a pipe cutting template from the side
The workpiece made of a larger pipe
Marking out a cut at 45 with a template
If you have to cut a profile pipe, it is advisable to make a special template from the same pipe, but with a larger cross-section. In this case, you will only have to use measuring tools once. To make a marking you will need to use a protractor or a construction angle.
After sawing the template, the pipes to be cut can simply be inserted into it and marked. Such an approach will save much time of work and it will be convenient to cut a profile pipe under 45 degrees.
As for what to use when carrying out the work, it is worth choosing the most suitable and familiar. It can be a simple hacksaw for metal, or an angle grinder with a mounted cutting disc.
Advantages of GFB
To answer our question, we have to understand what this material is. Gypsum fiber sheets, like gypsum board, are made from construction gypsum. But that’s where the similarity ends. The main features of GFB are:
- Reinforced with dissolved cellulose.
- Complete homogeneity of the material.
- No coating on top.
- High density.
Production of this building material is engaged in many manufacturers, but the most popular is made GFB called “Superleaf. If we continue comparing gypsum fiberboard with gypsum plasterboard of the same company, we can see that they perfectly complement each other. And the use of these materials in finishing work at the same time will only benefit the repair.
Despite the fact that from GFB you can perform any box, and the walls will be durable and non-combustible, nevertheless this material can not be bent, like gypsum board. This means that it is not suitable for the installation of complex structures with rounded shapes.
But on the floor, in dry screeds with expanded clay (the technology “KNAUF-superfloor”), gypsum fiber boards have no equal. Using them in the construction of the rough floor will give guaranteed positive results. The floor elements glued together from two sheets of gypsum-fiber board with a total thickness of 20 mm have the following useful properties
- They do not break.
- They don’t let the cold in.
- They create a perfectly flat surface.
- Moisture-resistant gypsum fiber boards withstand humidity up to 70%.
The essence of cold breaking technology
Rail breaking has the following features:
- Material of initial blanks. high-strength rail steel with not less than 0,65% carbon, also with increased manganese and silicon (the most widespread grades are 65GS, 70S2, etc.)., supplied according to GOST 2283 and GOST 1050. Spring properties and hardness of such materials are increased;
- The initial billets have a complex cross-sectional shape, as well as considerable weight and length, which complicates the transportation of such products to the scrap processing equipment;
- There are no special requirements for rail cuts in terms of the quality of the surface of the section.
Cold breaking of the rail into smaller pieces is therefore considered the cheapest and most accessible method for recycling.
How to break rails? Breaking technology consists of the following stages:
- Rail blanks are placed on rail supports.
- Stress concentrators are created on the billet in advance in the form of notches on the surface opposite to the working tool of the rail chopping tool. the number of notches depends on the chosen breaking scheme: single-support or double-support (the cantilever scheme is more traumatic and is not used in rail breaking machines). Notch depth should not exceed 68% of the cross-sectional height otherwise the quality of breaking is getting worse and the risk of jamming increases.
- A hydraulic drive brings the work punch approximately to the middle of the rail which is located between the two notches.
- Activate the hydraulic cylinder and start pushing the tool into the rail body. The tool is usually hemispherical to avoid the sudden cracking of the rail: in doing so, the pressure in the working chamber of the hydraulic cylinder drops sharply, which can put it out of operation.
- At the end of the breaking process, the slide and punch are returned to their original position. This can also be done by the operator, but in modern designs of rail breakers, the return takes place automatically, according to the readings of the contact sensors of the position of the workpiece.
Which method to choose
A number of factors must be considered in order to make a decision. The following are some of the main problems: costs (money and time), noise, duration of the process, and the need for outside help. From a safety point of view, cutting with a sabre saw seems to be an attractive method. In terms of speed. angle grinder or rail cutter.
The latter tool is expensive for most craftsmen, so we recommend taking two methods. with a sabre saw (metal saw) or an angle grinder with cutting discs. Knowing how to cut a rail quickly will allow the user to quickly achieve the desired result.
Cutting rails into parts is a very time consuming business. There is no surprise here, because actually when used for its direct purpose, the load on the railway rail is very high and implies a correspondingly high strength of the metal for its manufacture. Nevertheless, the known methods
Sawing rails is quite diverse. They differ from one another depending on the technical, auxiliary tools at hand, financial possibilities, time and physical effort involved.
This article will talk about when there is a need for sawing, what are the pros and cons of each of the proposed methods, and which of them, however, to choose for home conditions.
Cutting with a sewing needle
Such an unusual method was most popular only recently. in the 20th century. It’s hard to imagine today, but at that time there were no better devices. The result was achieved not by sawing, but by breaking the product. The method was as follows: the rail had to be placed on two supports with the base down. On the place, where a line was planned to trim the break, a sewing needle of great thickness (“gypsy”) was placed in the direction perpendicular to the item. A powerful, targeted blow at the point of the needle was struck with a hammer, which chopped the metal object in two pieces.
The advantages of the method consist in the minimum time required to achieve the result and the necessary apparatus, as well as in the practical absence of danger of injury. An indisputable advantage is that it can be done without an assistant.
A significant disadvantage is the difficulty of accurate hitting the right spot at the first time due to the lack of skill and dexterity. Several unsuccessful blows can destroy the integrity of the surface. Often the line for the trimmer break is uneven.
How to work properly with slate?
From all of the above, we can conclude that slate is used quite often. They are often used by home masters for a variety of purposes. But it is often difficult to understand how to trim a slate. This is a very fragile material, in addition, it is quite difficult to saw across the fibers.
Also, we should not forget that asbestos is a part of slate, when inhaling the dust of which can cause great harm to health. As a consequence, it is necessary not only to choose a way of cutting this material, but also as much as possible to secure the entire process. To this end, take measures to reduce dust emission and resort to the use of protective equipment: respirator, goggles, and gloves.
You can also use such methods to reduce dusting:
Use water. Wet asbestos cement emits much less dust when cutting it than dry material. In addition, any type of slate is easier to cut wet because asbestos cement becomes more elastic.
Correct location. It is best to cut the material in the open air, and to ensure that the dust is carried away by the wind, you need to stand on the leeward side.
Which method to choose
There are a number of factors to consider when making this decision. Among them. the cost of work (finances and time), noise, duration of the process, the need for outside help. From the point of view of safety, cutting with a sabre saw looks attractive. In terms of speed. angle grinder or rail cutter.
The latter tool is expensive for most craftsmen, so it is recommended to take two ways. with a sabre saw (metal saw) or an angle grinder with cutting discs. Being aware of how to quickly saw a rail, the user can quickly achieve the desired result.
I usually use a chainsaw for this purpose, and the STIHL MS 180 will do. It saws pretty easy, despite the fact that even larch twigs can be found. But! There’s one huge but. You have to sharpen the chain quite often, because the sleeper is used and it’s full of pebbles and dirt, and they dull the chain very quickly. So prepare a file, and preferably not one, and saw a sleeper as you need.
Of course you can cut one sleeper with a two-handed saw, but only if it’s just one. Otherwise, it would be reasonable to use hand-held gasoline-powered saw. Also, if you don’t feel sorry for the woodworking machine, you can saw it on it, too. It’s even faster and easier, but the saws are even more expensive. As for domestic needs, when it comes to the construction of outbuildings, then of course a good and reliable chainsaw is indispensable.
Of course it would be easier to cut such a thickness with a chainsaw. If you do not have such a tool, then the last resort is a saw. It is extremely difficult and time-consuming to cut sleepers with a one-handed saw. I’m sure after the first sleeper my hand will be completely clogged. So my advice is definitely a chainsaw.
In the section on how to cut a reinforced concrete sleeper? I want to make a foundation, but sleepers are long and need to do the tie, how to break them? Asked by the author of Trough, the best answer is with a diamond disc you can cut with no problem. The idea is mazovaya, for the sole it is the best, BUT. There are a number of nuances. Ж. б. sleepers have pre-tensioned rebar, 3mm diameter approximately 40 bars. If the sleeper will work in the gurunt, this reinforcement can davolno quickly rot and the sleeper will lose its properties, concrete without reinforcement in the bending does not work. Sleepers work on sand and gravel preparation, t. е. on w. д. embankments where there is no exposure to groundwater, so they live a long time on the iron. In general, if we use sleepers, it is necessary to create comfortable conditions for them, such as drainage and good waterproofing, preferably laminated, to avoid capillary movement of moisture. According to the rules, foundations do not reinforce with rebar less than 12mm. in diameter.
Hi! Here is a compilation of topics with answers to your question: how to cut a reinforced concrete sleeper? I want to make a foundation, but the sleepers are long and need to be tied together?
Answer from European [newbie]sit on it
Answer from Vprosonki [guru] They break with a sledgehammer. with 2 strokes. With an angle grinder you saw off the iron
Answer from Alexander schefer [guru]Take an ISC 633 saw with a diamond chain and saw it off. That’s all.
Answer from Future Uncle. [guru] If you use an angle grinder, you’ll use a diamond on reinforced concrete. Checked. The reinforcement in the concrete does not burn
Answer from Yotary Plinth [guru] Powerful angle grinder and cut-off abrasive wheel on concrete. It’s breaking along with the rebar.
Your band saw is installed and all necessary adjustments have been made? Then it’s time to get down to the actual sawing process. In order to get a really high-quality material, it is necessary to properly install the log and fix it with special clamps.
On the correct calculation of quantity and type of material you want to get from the log also depends on the quality.
Gaining experience later on one look at the log will be enough and you will already know how much and what material you can get from it. Learn to unmistakably determine where the top and where the butt part of the log is. The butt end is usually larger in diameter than the tip. And this largely affects the thickness of the hump.
Conditions for rail cutting
Specialists with the necessary professional knowledge and skills are allowed to carry out such work of dismantling and repairing rail structures. When using equipment where rails are sawn, it is necessary to apply the safety requirements to work with tools, careful handling.
If you use an electric tool for cutting, then it is mandatory to have the appropriate training and authorization to work with this equipment. Handymen who work with this type of power tool have an electrical safety group of more than II.
If the work will be carried out on rail-cutting or rail-drilling machines, then masters must know perfectly their device, the principle of operation, be able to change the modes of cutting, observe the safety rules for the performance of these works.