How does electrode temperature guarantee the welding quality of intermediate frequency spot welder?

In order to ensure the welding quality of the intermediate frequency spot welding machine, the electrode cooling channel must be set reasonably, the cooling water flow is sufficient, and the water flow depends on the electrode material, size, base metal and material, thickness and welding specifications.

Generally, ensure that the electrode welding is close to room temperature, and the outlet temperature does not exceed 30 ° C. If the remaining size of the electrode is the same, increasing the outer diameter D can dissipate the heat and increase the electrode life, so as to ensure the stability of the welding quality.

In addition, when the inner diameter of the water cooling hole d is appropriately increased (equivalent to increasing the contact area of the cooling water), the service life of the electrode will also be improved. The data show that when D is φ16 electrode, d increased from φ9.5 to φ11, the surface hardness of the electrode head in use will also increase, the use time will be extended, and the welding quality will be correspondingly guaranteed.

When spot welding galvanized steel plate with appropriate welding process, a preheating flow is added before connecting the welding current, so that the zinc layer is melted first, and it is squeezed away under the action of electrode pressure, so that the amount of zinc copper alloy formed with the electrode is reduced, and the resistance on the contact surface of the welding part is increased, and the welding current required to obtain the same melting core is reduced.