1, electrode force
Projection welding electrode pressure depends on the performance of the welded metal, the size of the bump and bump the number of a welded. Electrode pressure should be enough to bump reaches the welding temperature will completely pressure-fed, and two of the workpiece tight fit. Electrode force-fed over the General Assembly prematurely pressure bump, lost the role of projection welding, the current density decreases to reduce the joint strength. The pressure is too small will cause serious splash.
2, the welding time
For a given workpiece material and thickness, the welding time is determined by the welding current and bump stiffness. Projection welding of low carbon and low alloy steel, compared with the electrode force and welding current, welding time when the secondary. Determine the appropriate electrode force and Mig Welding Wires, welding time adjustment to get the solder joints. If you want to shorten the welding time, it is necessary to correspondingly increase the welding current, but the excessive increase of the welding current may cause metal overheat and splash, usually projection welding the welding time is longer than the spot, while the current is smaller than the spot.
3, the welding current
Of each solder joint for projection welding current required is the same than the spot when a solder joint. But must enable the bump completely crushing current bump melting current should be recommended in the use of appropriate electrode under pressure Buzhi Yu extrusion maximum current of the excess metal. For some bump size, the amount of metal extrusion increases with increasing current. Incremental amplitude modulation current can reduce the extrusion of metal. And Welding Electrode Suppliers and thickness of the weld metal is still the main basis to select the welding current.