Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1978-03-17
1980-05-06
Combs, Ervin M.
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
72156, B21D 704
Patent
active
042010730
ABSTRACT:
A rotary pipe bending machine employs a single hydraulic motor to drive clamp and pressure dies toward the bend die and to rotate the bend and clamp dies. The motor piston is connected via a chain to drive a clamp die carrier toward a rotatably mounted bend die and toward a bend die shaft actuator. Upon continued motion of the clamp die carrier, it engages the actuator to rotate the bend die together with a clamp die mounted on the carrier. The motor cylinder is movably mounted and connected to a pressure die carrier so that as the motor piston drives the clamp die carrier and the bend die, the cylinder, reacting to the driving force of the piston, drives the pressure die carrier, together with a pressure die thereon, toward the bend die with a force that is produced by reaction to the required bending force. Thus the pipe is frictionally tensioned according to the magnitude of the bending force. Two sets of dies are provided, one on each end of the bend shaft to enable pipe to be bent on either side of the bend head.
REFERENCES:
patent: 1935604 (1933-11-01), Abramson et al.
patent: 2871909 (1959-02-01), Bower
patent: 3276235 (1966-10-01), Stanley
patent: 3531963 (1970-10-01), Garner et al.
patent: 4022045 (1977-05-01), Riha
patent: 4059978 (1977-11-01), Dettling
patent: 4063441 (1977-12-01), Eaton
patent: 4085608 (1978-04-01), Franks et al.
Combs Ervin M.
Eaton-Leonard Corporation
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