Device for controlling butt welding machine

Details Device for controlling butt welding machine Device for controlling butt welding machine

B - Operations, Transporting

23

K

327/75

B23K 11/02 (2006.01) B23K 37/08 (2006.01)

Patent

CA 1079814

ABSTRACT OF THE DISCLOSURE A device for controlling a butt welding machine includes a pressure equalizing hydraulic slide valve connected to a mani- fold between the rod space of a clamping hydraulic cylinder and a reversible hydraulic slide valve coupled to both the delivery and drain manifolds of a hydraulic fluid supply system. Upon upset- ting, the rod space communicates through the pressure equalizing hydraulic slide valve with the drain manifold, providing the same pressure above and beneath the piston and releasing a part of the clamping force. Provision is made for a programmed control unit or timer for energizing electromagnets adapted for switching the pressure equalizing hydraulic slide valve and a follow-up or track- ing slide valve of a hydraulic drive adapted for carrying welded parts.

258475

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