In automobile body manufacturing is a large number of applications of resistance spot welding, now also gradually began to apply in the repair.
With the development of automotive materials, some of the ultra-high strength steel gas shielded welding welding will not be used. Gas shielded welding welding heat will damage the internal structure of ultra-high strength steel, reduce its strength. So can only use the resistance spot welding to repair it.
Resistance spot welding and one of the biggest advantage is less affected by the operator, as long as adjust welding pressure, welding current and welding time, each solder welding quality of basic won't happen big deviation, welding quality is stable.
In the resistance spot welding repair work, should pay attention to the welding quality control. The average resistance spot welder welding current can reach 6000 a, for general car body panel welding can be performed.
But for some of the ultra-high strength steel, welding current is likely to reach more than 9000 a, or the strength of the solder joint does not guarantee enough. Because not to come out whether panel welding good when viewed from the outside, before making a resistance spot welding, try to find the same material for welding.
When test weld to constantly adjust the welding pressure, current and time three parameters, and then conduct destructive test to verify whether the welding strength.