About Spot Welding Machine Installation And Maintenance

The welding machine must be properly grounded before use to ensure personal safety. Before using the welding machine, use a 500V megohmmeter to test that the insulation resistance between the high voltage side of the welding machine and the casing is not less than 2.5 megohms before applying power. Before maintenance, cut off the power before opening the box for inspection. The welding machine is first supplied with water and then welded. It is strictly forbidden to work without water. The cooling water should be guaranteed to supply industrial water at 5--30 ℃ under the inlet pressure of 0.15--0.2MPa. After the welding machine is finished working in winter, compressed air should be used to blow the water out of the pipeline to avoid freezing the water pipe.

The lead of the welding machine should not be too thin or too long. The voltage drop during welding must not be greater than 5% of the initial voltage, and the initial voltage must not deviate from the power supply voltage by ± 10%. Gloves, apron and protective glasses should be worn when the welding machine is operated, so as to avoid scalding from the sparks. The sliding part should be kept well lubricated and the metal splash should be removed after use. After the new welding machine is used for 24 hours, the screws of each component should be tightened once. Pay particular attention to the fastening screws between the copper soft coupler and the electrode. After use, the oxidation between the electrode rod and the electrode arm should be removed frequently. To ensure good contact.

If it is found that the AC contactor is not properly engaged when the welder is in use, it means that the voltage of the power grid is too low. The user should first solve the power supply problem. It should be pointed out that if the newly purchased welding machine has a quality problem of the main part within half a month, it can be replaced with a new one or the main part can be replaced. The main part of the welding machine is guaranteed for one year and provides long-term maintenance services. Generally, after the user informs the factory, the service will be available within three to seven days according to the distance. Welder damage due to user reasons is not covered by the warranty. Consumables and consumables are not covered by the warranty.

Because the contact area of the electrode determines the current density, the resistivity of the electrode material and the thermal conductivity are related to the generation and dissipation of heat. Therefore, the shape and material of the electrode have a significant effect on the formation of nuggets. As the electrode tip deforms and wears, the contact area increases and the solder joint strength decreases. Oxide, dirt, oil and other impurities on the surface of the workpiece increase the contact resistance. An excessively thick oxide layer may even prevent current from passing. For local conduction, due to excessive current density, spatter and surface burnout will occur. The presence of the oxide layer also affects the non-uniformity of heating of each solder joint, causing fluctuations in solder quality. Therefore, thorough cleaning of the surface of the workpiece is a necessary condition to ensure a good quality joint.