The Relation Between the Electrode Movement and the Spot Welding (1st Report)

The Electrode Movement as the Pneumatic Machine System of the Spot Welding Machine

Abstract

In this report, first we analyze experimentally the electrode movement as the pneumatic machine system of the spot welding machine using the high speed motion camera, and make clear the relations of the electrode movement with the electrode stroke, the pressures of the upper and lower air chambers and time.
Next, it is proved that the damping oscillation of the upper and lower electrodes begins from the instant of the impact of upper electrode with the lower part.
Then, we study the effects of this impact on the surface properties of the weld piece, for example, the contact area, and contact resistance between the weld pieces.
Putting the above facts together, knowledge to select the squeeze time under various conditions in the spot welding is obtained.