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Introduction and Comparison of Advantages of Some Welding Machine Classifications
Publish Time：
2019-08-30 15:48
Welding machines are generally classified into: medium-frequency inverter DC spot welders, medium-frequency spot welding equipment, industrial-frequency AC spot welding equipment, laser welders, etc. Today, Junjie Intelligent's editor will introduce you to:
Welding machines are generally classified into: medium-frequency inverter DC spot welders, medium-frequency spot welding equipment, industrial-frequency AC spot welding equipment, laser welders, etc. Today, Junjie Intelligent's editor will introduce you to:
1. Advantages of medium-frequency inverter DC spot welders: Small electromagnetic influence. When using AC spot welders, placing conductive workpieces and fixtures inside the working arm greatly affects the welding current, but this is not the case with inverter DC welding. DC welding has no AC "skin effect." Along the axial direction of the upper and lower electrodes, the distribution of the welding current on workpieces of different thicknesses is relatively uniform, resulting in more uniform heating. It can universally spot weld dissimilar metals. DC current has a "bundling" effect, the current is relatively concentrated, with less current division, high thermal efficiency, and can be welded with low current. Therefore, medium-frequency inverter DC spot welding has superior characteristics for welding plated steel sheets, iron, and combinations of different heat-conducting materials.
2. Difference between medium-frequency spot welding equipment and industrial-frequency AC spot welding equipment: 1. Comparison of energy-saving effects. Medium-frequency spot welding equipment has a significant energy-saving effect, high efficiency, and low losses, and by improving the output of DC power, the energy-saving effect is significantly improved. However, industrial-frequency AC spot welding equipment has high transformer losses and low welding power, resulting in high circuit loss. Its impact on the environment is also not as good as that of medium-frequency projection welders. 2. Comparison of heating speed. The current of industrial-frequency AC spot welding equipment is zero, which affects the heating time, extending the heating time, while the medium-frequency inverter spot welding equipment outputs DC power, and all the heat is relatively more concentrated, thus shortening the required heating time. Characteristics of medium-frequency spot welding equipment: The power factor of medium-frequency spot welders is relatively high, reaching up to 95%.
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