Method and apparatus for shearing metal billets

Details Method and apparatus for shearing metal billets Method and apparatus for shearing metal billets

1980-09-08

1982-08-10

Yost, Frank T.

Cutting

Processes

83196, B23D 1500

Patent

active

043432085

ABSTRACT:
A method of shearing a workpiece, for example a metal billet or bar, and apparatus for carrying out that method. Before being subjected to linear shear, the billet is first subjected to substantial torque about an axis perpendicular to the plane of shear. The billet is held by two pivoting arms, the predominant torque of the first stage of the method is achieved by allowing the pivot points of the arms to slide as the arms turn, and the predominant shear of the second stage is then achieved by arresting that sliding movement by stops. The parts of the arms which grip the workpiece may bear against a fixed surface during the whole operation, so holding the axis of the workpiece to a constant location.

REFERENCES:
patent: 543275 (1895-07-01), Vernet
patent: 584656 (1897-06-01), Vernet
patent: 3863535 (1975-02-01), Hamano et al.
Cropping of Pipes, Rods & Shaped Rolled Steels by Using Toolsets with Differential Clamping Pressure, A. A. Loginov, Kuznechno--Shtampovochnoe Prazvodstvo, vol. 20, Part I, pp. 40-42, 1978.

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