Apparatus and method for bending a workpiece

Details Apparatus and method for bending a workpiece Apparatus and method for bending a workpiece

1997-02-25

1999-03-02

Crane, Daniel C.

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

72 214, 72297, B21D 1102

Patent

active

058756655

ABSTRACT:
An apparatus for bending a workpiece comprises a stretching device for stretching the workpiece. In the process for bending the workpiece, an inclination angle made by a direction a tension force is acted to the workpiece and a direction a stretching forth is applied to the workpiece by the stretching member is detected. The tension force acted to the workpiece is controlled in such a manner that the stretching force from the stretching member is controlled in consideration of the inclination angle. Accordingly, the amount of the spring back after bending is uniform and an accuracy of the dimension of the bent workpiece is improved.

REFERENCES:
patent: 2553092 (1951-05-01), Hubbert
patent: 2734548 (1956-02-01), Fredericks
patent: 3148721 (1964-09-01), Seavers
patent: 3302437 (1967-02-01), Dolney
patent: 3365921 (1968-01-01), Dolney
patent: 4048826 (1977-09-01), Lechner

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