Medium-Frequency Resistance Spot Welding
Medium-frequency resistance spot welding is an electric welding process using DC in the medium-frequency range. It allows precise current control and reproducible weld nuggets, especially on coated sheets.
Physical-Chemical Working Principle
This process uses heat generated by electric currents. Medium-frequency direct current allows continuous current control, improving temperature control and making the weld more precise.
Metallurgical Relevance & Welding Risks
Precise control of the heat source prevents uneven distortion and hot cracks. If current regulation is incorrect, overheating or underheating can occur, affecting strength and mechanical properties.
Workshop Practice & Operating Instructions
Use a medium-frequency resistance spot welding machine with a stable power supply. Set the correct voltage and current values according to the material specification. Ensure the welding sheet is clean and free of coated surfaces, as these can be damaged at high temperatures.