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Impact of workpiece resistivity on automatic spot welder?

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发布日期:2020-01-04 15:15:10【 Browse: -Release Date: 2020-01-04 15:15:10 [Large Middle Small]

Automatic spot welding machine When the workpiece and the electrode are constant, the resistance of the workpiece depends on its resistivity. Therefore, the resistivity is an important property of the material being welded. If a metal with a high resistivity has a poor conductivity like stainless steel, the resistivity Low metals are as conductive as aluminum alloys.

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Therefore, it is difficult to produce heat when spot welding stainless steel, and it is difficult to dissipate heat. It is difficult to produce heat when spot welding aluminum alloy. Million amps). Resistivity depends not only on the type of metal, but also on the heat treatment state, processing method, and temperature of the metal.

The material of the automatic spot welder has high temperature strength and high temperature (0.5-0.7Tm) metal with high yield strength. The automatic spot welder is prone to defects such as spatter shrinkage and cracks during spot welding. At this time, large electrode pressure is required. If necessary, it is necessary to apply more forging pressure after power off, which will cause poor weldability.

There is also a material with a narrow plastic temperature range (such as aluminum alloy). The automatic spot welder is very sensitive to fluctuations in welding process parameters. If equipment that requires precise control of process parameters is required, and electrodes are required Has good followability and poor weldability.

The sensitivity of the material of the automatic spot welder to the thermal cycle is affected by the thermal cycle of the welding. This requires a metal that has a tendency to be quenched. To prevent these defects, corresponding technical measures should be taken. Therefore, the weldability of a metal with a high thermal cycle sensitivity is also poor.

Suzhou Anjia Automation Equipment Co., Ltd. is a professional welding equipment manufacturer, focusing on the development and sales of energy-efficient resistance welding machines, automatic welding equipment and industrial non-standard special welding equipment. Anjia focuses on how to improve welding quality, welding efficiency and reduce welding. cost. If you are interested in our automatic spot welding machine, please contact us: 400-8333-566.





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