1. The development of plasma cutting has made it possible to use a working gas that has a significant effect on the cutting characteristics of the plasma arc, as well as the cutting quality and speed. Common plasma arc working gases include argon, hydrogen, nitrogen, oxygen, air, water vapor, and certain mixed gases.
Plasma cutting machine is widely used in automobiles, locomotives, pressure vessels, chemical machinery, nuclear industry, general machinery, engineering machinery, steel structures and other industries!
2, laser cutting is the use of high-power density laser beam scanning the surface of the material, in a very short time the material is heated to thousands to tens of thousands of degrees Celsius, the material is melted or gasified, and then the high-pressure gas to melt or gasify the material from Blow in the slit to achieve the purpose of cutting material. Laser cutting, because the invisible beam is used instead of the traditional mechanical knife, the mechanical part of the laser cutter head has no contact with the work, and it will not cause scratches on the work surface during work; the laser cutting speed is fast, the incision is smooth and flat, generally no need Subsequent processing; small cutting heat affected zone, small plate deformation, narrow slit (0.1mm~0.3mm); no mechanical stress, no cutting burr; high precision, repeatability, no damage to the surface of the material; Can process any plan, can cut the whole sheet of a large format, without the need to open the mold, economical and time-saving.
General: In terms of cutting accuracy, the plasma can reach within 1mm and the laser energy can reach within 0.2mm; at the cost, the plasma cutting machine is much cheaper than the laser cutting machine, and the plasma cutting is relative to the laser cutting in the processing accuracy. One is rough processing, one is fine processing!
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In this process metal is forced into the mold at a high pressure that ensures production of identical parts, a better surface finish, and an increased dimensional accuracy. Some parts produced by die casting even do not require machining after casting, or may require only a light machining to achieve the desired dimensions. Defects of porosity are found more often in large castings because of entrapped air and the solidification of melt before it reaches the boundaries of the cavity. Parts with a uniform wall thickness can be more accurately produced by die casting. Die casting molds are expensive since these are made from hardened steel and because a longer time duration is required for their production.
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