Chain welding machine

Details Chain welding machine Chain welding machine

1977-10-04

1979-02-20

Lanham, C.W.

Chain, staple, and horseshoe making

Chain making

Welding

219 51, B21L 302

Patent

active

041399820

ABSTRACT:
This disclosure relates to a chain welding machine for the electric resisce pressure butt welding of a length of chain having interlinked chain links pre-bent into a C-shape. The machine comprises a pair of oppositely movable upsetting tools for engaging the opposite rounded ends of a chain link to be welded. A drive train is provided for each upsetting tool and one of the drive trains includes as an element thereof a single acting hydraulic cylinder. A hydraulic system for activating the cylinder includes a hydraulic pump connected via a feed line with the cylinder through a control valve, pressure regulating valve and check valve. The check valve is arranged to block flow of hydraulic fluid from the cylinder during a portion of the upsetting stroke of the machine and is unblocked by the control valve after termination of a welding cycle.

REFERENCES:
patent: 2288494 (1942-06-01), Speed
patent: 3906182 (1975-09-01), Lange
patent: 3906183 (1975-09-01), Lange

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