Metal deforming – By use of roller or roller-like tool-element – With work-forcer offset from – and relatively movable...
Patent
1977-09-16
1979-02-27
Mehr, Milton S.
Metal deforming
By use of roller or roller-like tool-element
With work-forcer offset from, and relatively movable...
72383, 72389, B21D 905
Patent
active
041412354
ABSTRACT:
A hydraulic bending machine comprises a reciprocating connector fitted symmetrically with a pair of roller holders having inner and outer rollers rotatably attached to the end portions thereof, respectively. In these inner and outer rollers to abut against a workpiece, the outer rollers have a diameter larger than that of the inner rollers. A guide block is disposed forward in the extending direction of the connector. When the connector extends, the workpiece is held between the rollers of the respective roller holders and the guide block. When the connector further extends, then the roller holders rock around their rocking centers, and the workpiece, pushed by the inner and outer rollers, is bent around the guide block. Since the diameter of the outer rollers is larger than that of the inner rollers, the workpiece is bent further by the outer rollers than by the inner rollers. Thus, there may be maintained a desired bending angle even with the restoring force applied to the workpiece after bending.
REFERENCES:
patent: 2464459 (1949-03-01), Newlon
patent: 2497622 (1950-02-01), Mueller
patent: 2938564 (1960-05-01), Rhodes
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