Numerically controlled resistance-welding machine and screw-nut system or analogous; its functioning mode

摘要

The invention relates to a resistance-welding machine of the type comprising a head (1) with two welding elements (3, 4) suitable for being displaced relative to each other and for gripping the parts to be welded (2), one (3) being connected to driving means (5) which are connected to control means (6) which are suitable for controlling the relative speed of approach of the said welding elements and the force with which they grip the said parts to be welded, as a function of the cycle of passage of the electrical current or of other parameters, the said welding elements being supplied with current by means of a step- down transformer (16) or by means of condensers. The said driving means (5) are of the purely mechanical type and are entrained by an electrical motor (5) and the said control means (6) are of the numerical type. IMAGE