With the advancement of automobile production technology, more and more materials have entered the field of automobile production, so aluminum alloy is widely used in automobile production. In automotive resistance, we often see an aluminum alloy resistor, which is in automotive products. The number of uses is also rising, and the spot welding of aluminum alloy body aluminum alloy has become the focus.


By testing the welding performance and electrode life of aluminum alloy spot welding, in order to accelerate the formation of nugget, the chromate layer of different thickness is plated on both sides of the aluminum alloy, so that the contact resistance with the electrode is relatively small, not only the joint is ensured. Performance also increases the life of the resistor.
 
 In order to improve the joint strength of aluminum alloy spot welding, metal electrode with auxiliary spot welding is used to change the temperature field of the weld zone to improve the joint quality of the welded joint surface. Aluminum alloy resistance spot welding designed the influence of different process parameters on the spot welding quality of aluminum alloy. In order to solve the welding problem of aluminum alloy more accurately, the carbon steel spot welding process is usually compared, the welding parameters are studied and the temperature field is changed for aluminum. The effect of the quality and performance of the alloy spot welded joint.
 
The aluminum alloy resistance spot welding head is prepared according to the GB/T2651-1989 standard. The sample is processed into a size of 100 mm × 25 mm × 1.5 mm, and the spot welded joint is in the form of a lap joint. Before the welding test, the surface of the aluminum alloy sample was first sanded by an angle grinder to remove the oxide film on the surface, and then washed in alcohol to remove impurities.

 
However, the quality problem of aluminum alloy spot welding is much more complicated than that of low carbon steel, mainly because the aluminum alloy material has low resistivity and small temperature coefficient. Through the correct test method, the optimal welding process parameters are obtained, and the welding process design of aluminum alloy resistance spot welding is completed.
 
In many cases, if the aluminum alloy resistor is not soldered, it is easy to find that the resistor cannot operate at high efficiency, resulting in a decrease in the resistance of the resistor, which is not conducive to the long-term use of the aluminum alloy resistor. If the aluminum alloy resistance is damaged, it will have a great impact on the later repair and replacement.