Deepakkumar Yadav
Electronic Circuits used in Resistance Welding System There are many electronic control circuits used in the resistance welding process, they are as follows : The line contactor : The line contactor is basically an electronic switch. The line contactor connects and disconnects the primary winding of the welding transformer across the ac mains supply. The … Read more
Basic AC Resistance Welding System Description : The “line contactor” is basically a controlled switch which connects the ac mains voltage across the primary winding of the “welding transformer” only during the welding interval. It otherwise disconnects the mains from the primary. The “welding transformer” is a step down transformer which supplies a reduced (steps … Read more
Advantages and Disadvantages of Resistance Welding Advantages of Resistance Welding : The resistance welding has following advantages over the conventional welding : The welding time is extremely short, a few millisecond to a few seconds. Due to the use of controlled devices like thyristors precise heat control is possible to achieve. Quality of welding is improved to … Read more
Line Contactor in Welding Transformer Line contactor is an electronic switch , which can connect or disconnect ac supply to the welding transformer primary at the time of welding . It is controlled by the control signals from the control circuits. Types of line contactors : Here we have to study two types of line contactors, … Read more
Principle of Resistance Welding Figure shows the basic arrangement for the resistance welding. The two metal sheets to be welded are clamped tightly together with external pressure, between the two electrodes. The welding current flows through these electrodes and through the metal pieces to be welded. Due to the flow of welding current through the … Read more
Electric Welding Control Welding is important and necessary process required in fabrication. There are basically three types of welding systems : 1. Forge welding 2. Fusion welding 3. Resistance welding 1. Forge welding : Here the jobs that are to be welded are heated upto their plasticity stage and then the jobs are superimposed to … Read more