Method for bending a metal thin plate

Details Method for bending a metal thin plate Method for bending a metal thin plate

1993-12-28

1996-03-26

Jones, David

Metal deforming

By relatively movable offset tool-faces

Embodying three or more coacting relatively movable tools

723892, B21D 501

Patent

active

055010946

ABSTRACT:
In the configuration wherein a metal thin plate is pressed by dies 2 to a punch 1 having unload channels 1b and 1c which elongates from one end of the punch 1 to the position corresponding to a tab-bent portion 60a of a workpiece 60, the edge portions of the punch 1 are chamfered as curved faces R or formed into an obtuse angle of 90.degree. or more. After the metal thin plate is bent along the punch, the angle of the edge portions is formed by pressing the metal thin plate toward the punch, and the workpiece 60 is unloaded in the direction along which the dimensions of the unload channels 1b and 1c formed on the punch 1 can be shortened.

REFERENCES:
patent: 3705512 (1972-12-01), Koschatzky
patent: 4660403 (1987-04-01), Slasinski
patent: 5099675 (1992-03-01), Heath
IBM, "Sheet Forming Die", Jul. 1966, p. 186.

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