Resistance Welding
Resistance welding generates weld heat by electric current flow between contact surfaces under pressure. It is a fast, effective process for various metals.
Physico-Chemical Working Principle
Resistance welding uses the electrical contact resistance at the surfaces of parts to generate welding heat. Current flows through the metal contacts and heats them, leading to a plastic state.
Metallurgical Relevance & Welding Risks
Too high a current can cause excessive wear or melting of the parts. Too low a current slows down the process and can lead to incomplete weld formation. Proper pressure regulation is crucial to ensure a homogeneous weld.
Shop Practice & Handling Instructions
Use a resistance welding machine with correct current and pressure settings. Start with a low current and increase it slowly until the parts glow. Keep the pressure constant and do not move the parts during the process. Monitor temperature and weld continuously.