Spot welding machine uses the principle of double-sided double-point overcurrent welding. When working, the electrode is used to pressurize the workpiece to form a contact resistance between the metals, and the welding current can form a loop in an instant, but it will not damage the internal structure of the workpiece.

  1. Classification

  According to the purpose, spot welders can be divided into two types: general-purpose and special-purpose.

  According to the number of solder joints, spot welders can be divided into three types: single-point, double-point and multi-point.

  According to the conduction method, spot welders can be divided into two types: single-sided and double-sided.

  According to the installation method, spot welders can be divided into three types: fixed, mobile and suspended.

  2. Use

  (1) Adjust the position of the electrode rod before welding, and the electrode should just be able to press the weldment.

  (2) The number of current adjustment switches can be selected according to the thickness and material of the weldment.

  (3) Turn on the cooling water first, and then turn on the power, you are ready for welding, and the weldment should be placed between the electrodes.

  (4) Before welding, clean the weldment. There should be no dirt, oxide scale, etc. on the welding place, otherwise it will affect the quality and service life of the welding.

  (5) Welding parameters, such as welding current, should be determined according to the condition of the weldment. The higher the metal conductivity, the greater the welding current density, so the welding time should be shortened. This aspect also requires our attention and cannot be taken lightly.