After purchasing a spot welding machine, professional installation personnel should be hired for installation. Incorrect installation may affect a series of uses in the later stage. Staff should be familiar with the precautions in the manual in order to reduce errors during the use of spot welding machines. The correct operating method can effectively avoid accidents.

The welding machine lead should not be too thin or too long. The voltage drop during welding should not exceed 5% of the initial voltage, and the initial voltage should not deviate from the power supply voltage by ± 10%. When operating the welding machine, gloves, aprons, and protective goggles should be worn to prevent sparks from flying out and causing burns. The sliding part should be well lubricated, and metal splashes should be removed after use. After 24 hours of use, the screws of each component of the new welding machine should be tightened once, especially paying attention to the connection screws between the copper flexible joint and the electrode. After use, the oxide between the electrode rod and the electrode arm should be regularly removed to ensure good contact.

If it is found that the AC contactor is not firmly closed when using the spot welding machine, it indicates that the grid voltage is too low. The user should first solve the power problem and use it only after the power supply is normal.

Due to the fact that the contact area of the electrode determines the current density, the electrical resistivity and thermal conductivity of the electrode material are related to the generation and dissipation of heat. Therefore, the shape and material of the electrode have an impact on the formation of fusion nuclei. As the electrode tip deforms and wears, the contact area increases and the strength of the solder joint decreases. The oxides, dirt, oil, and other impurities on the surface of the workpiece increase the contact resistance.

An excessively thick oxide layer can even prevent current from passing through. Local conduction, due to excessive current density, can result in splashing and surface burning. The presence of oxide layer can also affect the uneven heating of various solder joints, causing fluctuations in welding quality. Therefore, thoroughly cleaning the surface of the workpiece is a necessary condition to ensure obtaining high-quality joints.