Spot welding machines have become one of the important application equipment in the automobile and motorcycle assembly industry and the electronic and electrical processing industry due to their high welding efficiency and excellent spot welding quality. With the continuous increase in its application rate, a batch of professional spot welder welding machines have emerged in the market. Now precision spot welding machine manufacturers have made a brief overview and analysis on how to adjust the molten core offset when spot welding workpieces with uneven thickness: How to adjust the molten core offset when spot welding workpieces with uneven thickness?
1. Use stronger spot welding conditions
Many spot welding machine manufacturers have shared that users should pay special attention to the spot welding of workpieces with uneven thickness when using resistance spot welding equipments. Because uneven thickness can easily cause the hard core to deviate to the thick plate or the side with poor electrical and thermal conductivity. At this time, in order to correct this offset phenomenon, it is recommended to increase the heat generation effect of the contact resistance between the workpieces and reduce the effect of electrode heat dissipation, such as using high current for spot welding operations.
2. Use electrodes of different diameters
When the molten core of the spot welding device is offset, it is not only easy to reduce the strength of the weld, but also reduce the working penetration rate of good thermal conductivity. In order to avoid such phenomena, many spot welding machine manufacturers recommend using electrodes with different contact surface diameters to balance the density and heat dissipation on both sides. Generally speaking, using small diameter electrodes on thin parts and the side with good electrical and thermal conductivity is more conducive to increasing density and reducing the impact of heat dissipation.
3. Use different electrode materials
According to the relevant guidance and suggestions of many spot welding machine manufacturers, when a workpiece has a nugget offset due to uneven thickness or inconsistent materials, it can be adjusted by using different electrode materials. For example, copper alloys with poor thermal conductivity are used for thin plates or workpieces with good electrical and thermal conductivity, so as to reduce the heat loss on this side.
Spot welding machines have won the hearts of many companies with high-quality welding processes, especially some suitable spot welding machines have enabled many companies to quickly improve the qualified rate of product quality and work efficiency. However, the workpieces of some companies are prone to nugget offset due to uneven thickness. At this time, the offset effect can be reduced by using stronger spot welding conditions, using electrodes of different diameters, and using different electrode materials.
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