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Cutting metal. various equipment

Технология сварки

Metal cutting in Almaty

Heat treatment of metal called a sharp (cutting blanks, by heating. The heat produced between the parts of the metal as a result of cutting, called the cut. The shape and nature of the cut can be dividing and cutting surface, the surface roughness of the cutting - harvesting and finishing. Thermal cutting differs from all other types of cutting, high efficiency at low energy costs and the possibility of obtaining parts of any arbitrarily complicated circuit with a large thickness of the metal.

You can select more than one group of thermal cutting processes: melting, melting davleniemi-oxidation. When cutting metal melting, oxidation at the site of cutting is heated to its FIRE for oxygen, then set fire to it in a stream of oxygen, using the image heat for heating the following sections of the metal. The products of combustion blow out a jet of cutting oxygen and gases from the combustion of the metal. By cutting the oxidation include flame and oxygen-cutting Flux. When cutting metal by melting at the site of cutting heat potent concentrated source of heat above the temperature of its melting and blow away the molten metal from cutting through the power of the arc plasma pressure, the reaction of metal vapor, and other electro-forces generated by the action of the heat source, or special gas jet. Ideas for this group include arc, arc-air, compressed arc (plasma), laser cutting and termo gazostruynaya.

When cutting the melting-oxidation process is used at the same time vse2 upon which the two previous methods of cutting. Ideas for this group include oxy-arc, oxy-plasma, oxy-laser cutting.

 

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Schemes of thermal cutting processes

3_32_2

4_31_2


In case of default precautions can happen PE

Cutting arc welding, electro

When an arc cutting the molten metal is removed from the cutting zone, the mechanical action of the arc, and under its own weight. This method can cut mild steel, alloy, nonferrous metals and iron.

Electric arc cutting produces metal and carbon electrodes and shielding gas. Used metal electrodes must have a special thick coating, which when burned, release heat and oxygen, which speeds up the process. In practice, widely used conventional electrodes tolstopokrytye brands CM-7 CM-7S, and others. Metal electrodes are used mainly for installation works properly.

Carbon electrodes are at work on DC straight polarity. For a more narrow cut plate electrodes are used.

The method of cutting metal arc has some shortcomings: low productivity of the process, lack of clean cut, the cutting edges of the carburizing carbon electrode, sinters at the bottom edge, high consumption of the base metal.

Performance of arc cutting process is determined by the amount of metal melted per unit time

Gv = AOn · I · t, where Gv = AOn / (I · t), g / Ah

 

 

svr22Performance will vary depending on the current and angle elektrodaotnositelno surface treated metal. It is established that the best performance will be at an inclination of 10 ° With this angle increases the effective heat capacity of the arc at the expense of reduced heat loss into the environment.
.

Air-arc cutting is a new way of processing metals and combines the two physical processes: melting metal arc heat and blowing the molten metal with compressed air. Oxidation of the metal at the same time there is only as a secondary phenomenon, which does not affect the cutting process.

Number of smelted metal depends on the number of heating, let down by an electric arc, the heat capacity and thermal conductivity of the metal. Air-arc method can cut carbon, alloy, high-alloy steel, cast iron, bronze, brass, aluminum and its alloys.

When properly managed process molten metal is completely removed and the surface of the base metal, owing to the short duration of effects of heat, does not change its composition. Air-arc cutting is used for surface treatment of metal smelting defective sections of the root weld, rivet cutting, cutting cracks, melting defects in castings for the V-shaped preparations of the weld groove, punching holes for the connecting straps and rivets.

The advantage of air-arc cutting - its economy, the use of non-deficient materials and simplicity of equipment

When the air-arc cutting using carbon electrodes with diameter 6-14 mm, length 245 mm or more. Electrodes when cutting heated to white light and fast "burn." In this case the rod is pointed and forms a cone. Less heat and more resistant in the copper covered carbon electrodes and carbon-graphite, electrodes.

 

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Angle grinders, Angle Grinder, or in Bulgarian* *

bflgarka_viveska Bulgarian - one of my tools, it can cut anything and everything! Any metall, kamen granite, beton, cteklo, kafel even faneru, with eerie smoke pravdaWink Bulgarian can cut, grind, polish, polish ...

I have to say - very dangerous, cunning and terrible instrument. When cutting metal, the disc can jam and break into pieces, hold in their hands very hard, jumps abruptly and unexpectedly, if not hold - no arms can follow any responses to stay. About the eye - generally keep quiet. If you have not used the grinder kakda not, forget it. I am very serious! During his time with her I got a few small ones, and three times was at an eye clinic - removed a splinter from the eye (two of which flew under ochkiWink

If you already have experience, I will give some tips

- For such things as trimming seams, and other small trinkets, suitable only for Bulgarian drives 115 125go size. Strictly speaking, this is a very convenient size. Thin, 1 mm disc, you can easily cut it 15mm steel plate 1 m wide, if you follow this simple rule: 10 minutes of work - 30 minutes to cool down. Small, not particularly expensive grinders, fear of overheating, it is easy to burn .- Cutting is easier to use disks of thickness 2-1.2mm, and 3-4 mm discs - for stripping and grinding.


slomani_disk

Important Precautions

  • обрабатываемая деталь должна быть крепко закреплена
    • болгарку нужно держать крепко, стараясь придугадать направление срыва (при заклинивании или при слoме диска болгарка пытается выпрыгнуть из рук или отбросить деталь)
    • для защиты глаз необходимо использовать качественные защитные очкиCool
    • соблюдайте технику пожарной безопасности. Внимательно смотрите за тем, куда отлетают искры (искры из под болгарки могут вылетать на 6-7 метров)
    • категорически ЗАПРЕЩЕНО ставить вместо диска какие-либо пилы или фрезы прикрывающий диск кожух можно регулировать только при выключеном инструменте, работать без него невозможно

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Metal cutting PS-5.1

PS51

The main advantage is the Ps-5.1 mobility and light weight unit that facilitates the work of welders, but the cutting of the metal has a small supply of oxygen and propane. Run them a lot of work puts not possible. Refilling bottles consumables always problematic.
The set includes a handy cutter for cutting metal with replaceable nozzles. Hoses included with PS-5.1 in my opinion soon. But by and large portable welding station PS-5.1 with a sharp metal copes.
When you purchase a PC-5.1 to draw attention to some very important things that at first glance are not visible, will answer all your questions on: ICQ (581-088-276) Skype (fox3911) tel.8 727 391 70 37 mob.87014286457

 

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