Tag Archive The use of spot welder

How to use spot welding machine:


1. The position of electrode rod should be adjusted before welding, so that the electrode arm keeps parallel with each other when the electrode is just pressed into the weldment.


2. The choice of series of current regulating switches can be selected according to the thickness and material of weldments. After power on, the power indicator should be on, and the electrode pressure can be adjusted to change the compression degree of the spring pressure nut.


3. After the above adjustment is completed, the cooling water can be first connected to the power source and ready for welding. Welding procedure: the welding piece is placed between the two electrodes, step down the pedal, and make the upper electrode contact with the welding piece and pressurize it. When the pedal continues to be pressed, the power contact switch is connected, so the transformer starts working secondary circuit energized to heat the welding piece. When the electrode rises when the pedal is loosened after a certain time of welding, the power supply is cut off first and then restored to its original state by the pulling force of the spring, and the single point welding process ends.


4. Welding preparation and assembly: Before welding, all dirt, grease, oxide scale and rust should be removed. For hot-rolled steel, it is better to wash, sandblast or remove oxide scale with grinding wheel. Uncleaned weldments can be spot welded, but the service life of the electrode is seriously reduced, and the production efficiency and quality of spot welding are also reduced. For medium and low carbon steel with thin coating, it can be directly welded.


In addition, users can refer to the following process data when using:


1. Welding time: In welding medium and low carbon steel, this welding machine can use strong specification welding method (instantaneous power) or weak specification welding method (long time power). Strong standard welding method should be adopted in mass production, which can improve production efficiency, reduce electric energy consumption and reduce workpiece deformation.


2. Welding current: the welding current depends on the size, thickness and contact surface of the weldment. In general, the higher the conductivity of metal is, the greater the electrode pressure and the shorter the welding time. The required current density also increases.


3. Electrode pressure: The purpose of applying pressure to the weld is to reduce the contact resistance at the solder joint and to ensure the pressure needed for the formation of the solder joint.