1, the argon arc welding

Argon arc welding fork called argon shielded arc welding, which is developed on the basis of the general electric arc welding a welding method. Argon arc shielding gas is usually used in the air from the weld zone, to prevent the oxidation of the welding zone. Argon arc welding is the most significant advantage is completely to prevent the air into the, welding joint is not affected by the erosion of oxygen, nitrogen, hydrogen, to obtain high quality without the need for coating and various solvent weld, to avoid the formation of slag inclusion and porosity in weld. Wrinkling and contraction of the weld and artifacts minimum, mechanical properties and corrosion resistance of welding joint is greatly increased. However, disadvantages as well as argon arc welding, welding will produce strong ultraviolet ray, infrared, ozone, oxygen and ammonia thorium radioactive dust and so on, puts forward higher requirements on the welding safety and health.

Argon arc welding is suitable for the non-ferrous metal and alloy steel welding, suitable for non-ferrous metal and alloy steel welding, suitable for single-sided and double-sided forming, argon arc welding cannot contact with oxygen in the air, because in the process of high temperature welding argon arc welding is continuous.

2, welding

Welding is a kind of fusion welding, it using the combustible gas and oxygen flame heating metal by certain proportion. The commonly used flammable gas such as acetylene, liquefied gas. Welding with low cost, simple equipment, convenient operation, easy to fire control, don't need power supply etc, when needs in welding power supply is insufficient, can play a greater role. However, the oxygen - acetylene is a flammable and explosive gas in the gas welding. Therefore, this method is the most dangerous of all welding method. In addition, after welding workpiece deformation and heat affected range is larger, the welding quality is not high, gas welding productivity is low, hard to automate. Therefore, the welding is not suitable for use in storage shelves.

3, electron beam welding

Electron beam welding is a kind of using electron beam speed up concentrated bombardment energy produced by vacuum or anti-vacuum weldments welding method. Electron beam welding of the main advantages are: electron beam penetration ability, weld depth and width than the big, welding speed, small heat affected scope, welding deformation is small. Electron beam welding technology is difficult, however, the cost is high, generally need to vacuum cavity, even with the vacuum electron beam, there is also a hard X rays, and current, the dangers of proliferation therefore cannot be widely used.

Electron beam welding because of its welding speed is fast, in the field of electronics and automobile manufacture showed a high production capacity. Electron beam technology also reflects the electron beam technology in the aerospace, shipbuilding, or piece of some products in railway industry processing and small batch production of accuracy and repeatability, but for warehouse shelves welding structure, its function is too single, unable to meet the requirements.