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Installation and maintenance of mid-frequency spot welder [DCS04]

Dec 21,2023

Maintenance before start-up welding

Spot welder should be properly grounded before use to ensure personal safety. Before powering on the spot welder, use 500V Megohm meter to test the insulation resistance between the high-voltage side and the shell of the welder. Make certain that the insulation resistance is not less than 2.5 megohm before electrifying.
The spot welder should be watered before welding. It is not allowed to work without water supply. The cooling water supply should be 5-30 ° C industrial water under the inlet pressure of 0.15-0.2 MPa.

3. The lead wire of welding machine should not be too thin or too long. The voltage drop should not be greater than 5% of the initial voltage, and the initial voltage should not deviate from the supply voltage ± 10% .

DCS04 HFDB-200 spot welder

Cautions during the working of spot welder

Welder operator should wear gloves, aprons and glasses when working, in order to avoid being hurt by sparks flying out.
Clean the workpiece surface

Because the contact area of the electrode determines the current density, the resistivity and thermal conductivity of the electrode material affect the generation and loss of heat, the shape and material of the electrode have an effect on the nugget formation.

With the deformation and wear of electrode end, the strength of welding joint will decrease with the increase of contact area. The oxide, dirt, oil and other impurities on the workpiece surface increase the contact resistance. Too thick oxide layer will prevent the current from passing through. Local conduction, due to the current density is too large, will lead to spatter and surface burn of welding joint. The existence of the oxide layer will also affect the uneven heating of each weld joint, causing fluctuations in welding quality. Therefore, cleaning the workpiece surface is a necessary condition to obtain good welding results.

The screws and bolts of all parts of new welder should be fastened once after 24 hours working. Pay attention that the screws between copper flexible connector and the electrode are fastened well. Always remove oxide between electrode rod and electrode arm after working.
If it is found that the AC contactor is not properly engaged when the spot welding machine is in use, it shows that the voltage of the electric network is too low. Users should solve the power supply problem at first. Only power supply comes normally can the welding machine be started up.

mid-frequency spot welder 4

Maintenance after completion of welding work

The sliding part of the spot welder should be well lubricated and the metal spatter should be removed after working.
In winter low temperature surrounding, after the spot welder finishes working, it is important to use the compressed air to blow the water out of the pipe to avoid pipe being frozen or cracked.
Cut off the power supply before opening the box for inspection.
Frequently check the wear of electrode head. Replace the electrode head in time if electrode head wear is serious.