Metal fusion bonding – With means to juxtapose and bond plural workpieces – Strip leading end to trailing end bonder
Patent
1998-02-05
1999-11-09
Heinrich, Samuel M.
Metal fusion bonding
With means to juxtapose and bond plural workpieces
Strip leading end to trailing end bonder
228 19, 228 443, 228125, 219 53, 219 97, B23K 1104
Patent
active
059797380
ABSTRACT:
A machine for flash-butt welding of rails, incorporates two tong-type clamping devices made in the form of two two-arm levers carried by a common central axle with insulation from each other and capable of being displaced along the axle relative to each other by two flashing-upsetting hydraulic cylinders connecting them and having bimetal current-carrying rods. Each of the two-arm levers is hinged at one end to the rod or the clamping hydraulic cylinder case, respectively, and the other end is fitted with the clamping and current-carrying jaws. Two welding transformers built into the hollow two-arm levers of one of the two tong-type clamps are joined by current-carrying jumpers through the current-carrying part of the rods of the flashing-upsetting hydraulic cylinders to the current-carrying clamping jaws. A clamping hydraulic cylinder is made with a hydraulic intensifier built into its rod. A reflux valve with a calibrated spring and shank is built into the plunger-rod of the hydraulic intensifier, and a pressure valve is mounted on the hydraulic intensifier cover-lug, this valve being connected by the internal valves with the hydraulic intensifier cavities. The flashing-upsetting hydraulic cylinders being made in the form of tandem-cylinders, wherein two pistons separated by a partition are mounted on a common rod in each hydraulic cylinder.
REFERENCES:
patent: 3336839 (1967-08-01), Welter
patent: 4232610 (1980-11-01), Theurer
patent: 4236453 (1980-12-01), Collen
patent: 5147085 (1992-09-01), Hawkes et al.
Andrienko Fedor A.
Bogorskii Mikhail V.
Golovachev Victor N.
Krivenko Valerii G.
Kuchuk-Yatsenko Sergei I.
E.P. Paton Electric Welding
Heinrich Samuel M.
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