What is arc spot welding?

Arc spot welding is a welding method that uses arc heat to melt overlapping metal parts, creating a spot weld.
Arc spot welding is a welding technique that uses an arc as a heat source. The high temperature of the arc locally melts the contact points of overlapping metal parts, forming a point-like connection. The core of the process is to use arc heat energy instead of the resistance heat generation method of traditional resistance welding. This method is characterized by fast weld formation and high joint strength. This technology is primarily used in the automotive and thin-plate structure industries. The resulting weld, called an arc spot weld, has a sharp weld shape and a small heat-affected zone.

Process Principle

Arc spot welding uses the arc generated between the electrode and the workpiece as a heat source. The arc instantly reaches the melting point of the metal at the contact point, causing the two overlapping plates to locally melt and solidify into a weld. Compared to traditional spot welding, the energy source is easier to precisely control, effectively reducing thermal deformation.

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Automotive Industry: This technology is widely used for welding body panels.
Thin-Wall Structures: Suitable for joining sheets of mild steel, stainless steel, and other materials with a thickness of 0.5-3mm.
Special Applications: Components sensitive to welding distortion or requiring local reinforcement.

Technical Features
1.
High Efficiency: Single-point welding cycle can be reduced to less than 0.5 seconds.
2.
Flexibility: Welding can be completed without applying mechanical pressure.
3. Precisely controllable nugget diameter via arc parameters.