Tip 1: How to cut gas

Instruction

First, warm the place of cutting to a certain temperature. Keep in mind that for each type of metal there may be a heating value. It is mainly varied from 300 to 1300 degrees. The preliminary procedure will begin to begin the oxidization of the metal in oxygen. As a result, the flame of acetylene or gas-substitutes appears. After that, you can let oxygen, which cuts the metal and immediately removes oxides. Watch that the heating flame is continuous, for this it should be a jet of oxygen.

Choose, if possible, low carbon steel with a substance content of not more than 0.3%. They are most easily subjected to cutting process. For high carbon metal, you will need to resort to cutting with the addition of special fluxes.

Pay attention to the flame, its length should depend on the thickness of the metal. Thus, the substance whose thickness exceeds 400 mm, it is necessary to cut the flame penetrating the entire depth containing a large amount of acetylene. Otherwise, you can do the supply of a normal flame.

Install the direction of the flame to the edge of the metal, it is very important from the very beginning the correct angle of inclination. Direct the heating flame on the edge of the metal until you reach the desired melting temperature.

Observe a certain order of the metal cutting procedure if you want to saddle holes. In this case, first heat the edge of the material, then turn off the flame and only after that begin the supply of cutting oxygen. Open the valve on the cutter very slowly, so the oxygen flame will light up from the melted metal, and you will avoid the reverse flame, cotton.

Pay attention to the metal thickness: if it exceeds 50 mm, hold the sheets under the tilt, so you can provide stock of slag formations and perform the work as much as possible.

Choose the mouthpiece based on the thickness of the metal: if it varies in the range of 8-300 mm, you will need a mouthpiece with an external one to 5 and internal from 1 to 2.

You can correctly implement the process of cutting the metal, initially correctly by choosing the cutting angle of the cutter during cutting, determining the point with which you begin cutting, withstanding the correct angle of the flame (no more than 5 degrees of inclination, with a metal thickness, more than 100 mm is allowed to deviate in 2-3 degrees. ), pick up the necessary gas and a suitable mouthpiece.

note

The whole process must be carried out in special clothing. It is necessary to protect your eyes using special glasses, put on gloves and suit.

Helpful advice

When you complete the process, turn off the gas cylinders gradually. First, eliminate the oxygen supply, then propane.

Sources:

how to cut metal

A paper cutter is an integral attribute of any printing house and almost any office. And the choice of these products in the stores is impressive. However, to choose a suitable model - this is a very difficult task. There are roller cutters, sabers, guillotine are three main types. Unfortunately, not all buyers of paper cutters remain satisfied with the choice. And all because they look primarily at the price, not paying attention to more important selection criteria. To decide on the choice, first find out what you have to choose from.

Instruction

Roller cutters are the simplest and affordable. The cutting surface is a sharpened metal disk, moving over the counterpart along the base of the device by the rod. In cheap models, the counterpart often acts as the edge of the base. Roller cutters can paper large formats and are famous for great accuracy. As you can see, such models are quite simple, so that they are also very reliable and easy to operate. The only drawback is low performance.

Saberous cutters are more productive than roller. In them, as already understandable from the title, a sharp knife is used for cutting - "saber". One side is attached to the base of the cutter, and there is a pen. Pressing on it, you drive the knife down, and it comes into contact with the counterpart, the role of which can also play the edge of the base.

If at times on the roller cutter you can cut on average no more than 10 sheets, the saber can cope with 50 sheets of paper. Unfortunately, the shortcomings of the saber cutters are greater than their roller "counterparts": often the lower sheets are trimmed by a curve, since the knife of paper for themselves; Paper flies with a cut, which leads to the formation of teeth in its edges.

To level these, do not need to save on a saber cutter - take care that it is equipped with a reliable pressure device and a knife made of high-quality steel. By the way, for the most part, the cost of the saber cutter determines the knife.

For guillotine cutters, some of ignorance are saber. Undoubtedly, they are similar, but the differences between them are much more than similarities. Guillotine cutter models are equipment for professionals. They are able to cut a stack of paper with a thickness of several dozen centimeters. In addition to paper, guillotine cutters can also cut other materials as similar in paper with paper, and very different. And buy such machines usually in printing houses and large offices. It is worth the equipment, of course, silent. Nevertheless, if you decide to acquire for your printing house with such a cutter, buy even one roller - he can still perform such work for which his guillotine "Sorodić" is not intended.

Office cutters are suitable for carrying out most of the standard operations. Therefore, they are widely used in small and medium offices, as well as at home (photographers, for example). Such cutters include most roller, as well as some saber models. For the class of cutters, a small performance and a small price is characteristic. Remember, however, that if the price is too small, most likely, the knife is made of poor-quality metal, and it is not worth buying such a cutter.

Finally, professional cutters are devices that are intended mainly for printing houses. They may not only be guillotine, as some think. Professionals may well be roller cutters, and sabers, certainly equipped with very high-quality knives, providing impeccable cuts. Such cutters are very reliable and have the greatest productivity. Well, an impressive price, of course, they also differ.

Video on the topic

A dump knife is a stationery tool having a small blade. It is suitable for cutting small parts. Consider how to choose and how to use a dump knife.

Description

Macate knife is great for making decor. The tool cuts ordinary paper, watercolor paper, pastels, as well as cardboard.

The knife consists of a handle from wood, plastic or metal, and blades. You can find different tool models that differ in the form of blades. She may be:

with a pointed and gear edge;
triangular;
rectangular;
sawnum;
rounded.

Pointed blades have a sharpening angle of 30 °. In triangles, this parameter is 23 °. Such blades can also be used when working with wood, plastic.

How to choose a sink knife

When choosing a maquet knife, pay attention to how the material is made of its handle. It is recommended to acquire a tool with a metal handle. The plastic handle must be strong enough to do not break under pressure. It is better that there is a seal on the handle, it does not give a hand to slip.

Another nuance is a blade clamp that is a metal knob coated with rubber. If it is made of plastic, this tool is better not to buy. It is not reliable, after some time a gap may appear in the attachment, and the blade will fall out.

How to use a dummy knife

Cut out the battle knife in the following order:

Draw an image schema from the wrong side of the material.
Start cut with the smallest details. Go to the central part. If there is a contour, handle it last.
Rent all the details without leaving any one. In no case can not be to pull out any of them, it will spoil the work.
To simplify cut line lines, use a ruler.
In the process of work, you can rotate the material with a pattern. This will facilitate work.
Select the appropriate background depending on the selected plot, assigning the cutting and stick to it.

For safety reasons, do not let the dummy knife for children, let them use scissors. Use a bug in the workset. It will allow the blade of the knife longer to remain sharp. At first, it is possible to replace a stack of a pile of newspapers, a cutting board, a piece of linoleum or glass.

Modern works performed by cutting out of paper are called openwork (filigined) cutting, as well as paper graphics, slit images. In such a technique you can make napkins, postcards, panels, frames, decorations on the windows, on the mirrors, etc.