1.Spot welding head for mild steel Projection welding of mild steel is widely used. The following table shows the welding conditions of spherical and conical projection welding. 2.Projection welding of coated steel plate Projection welding of coated steel sheet has fewer problems than seam welding, the reason is that the current is current is concentrated on the bumps.Even if the coated metal at the contact is first melted and diffused, there will be ni reduction in current density such as spot welding and seam welding.In addition, due to the large contact surface ans low current density of the plane electrode of projection welding, both the adhesion of the plating layer and the deformation of the electrode are relatively small. 3.Projection welding of PVC plastic surface steel plate This kind of steel plate has an insulating PVC plastic layer on one side, and it can only be welded by single-sided single-point or single-sided double-point welding.In order to protect the adhesive plastic surface from being damaged, it is necessary to use a shorter time for welding.Generally,half a week of electricity is used to control the heat time and heat, even shortened to 1/6 week or use energy storage welder for short time welding.In order to ensure that the plastic-coated surface does not have the same obvious indentation, the steel plate backing plate with the same pattern as the plastic-coated steel plate is usually.

Method of spot welding When the spot welding head is not strong or the wire is brought up, the main point should be the spot welding head, not the higher parameters. When spot welding, be careful not to use too much force to grind, just use a grinding disc or W5 use fine sandpaper to lightly grind the bottom of the spot welding head for couple of times. Don’t throw the spot welding head often The center of the spot welding head is insulating glue. Tightening the spot welding head and then loosening it will affect the touch position of the two spot welding heads, resulting in poor welding performance. Therefore, it is strongly recommended that the spot welding head is installed and used until it cannot be used. Just take it out, do not often disassemble the spot welding head in the middle. The clamping part of the spot welding head clamp should be clean Due to the large current used in welding, the reason why large parameters are often required is because there are a lot of dirt where the spot welding head clamp clamps the spot welding head, which seriously affects the flow of current. Therefore, it is recommended to clean the area once a month. To line up correctly Defective products are generally caused by inaccurate alignment. One is that the line must pass through the two ends of the bottom end of the spot welding head, and the other is that there is an error when looking at it, and the line must be pressed at the bottom end of the spot welding head. The center position, but it appears to e where the wire is pressed behind the spot welding head.

The micro-spot welding head is the corresponding welding head of the microelectronic spot welding machine. Its characteristic is that the welding head and the welding machine form a loop.