Broach pulling mechanism

Details Broach pulling mechanism Broach pulling mechanism

1978-04-26

1979-12-25

Weidenfeld, Gil

Gear cutting, milling, or planing

Broaching

Cutter support or guide

B23B 4104

Patent

active

041803604

ABSTRACT:
A broach pulling mechanism is provided utilizing puller jaws which engage with a significantly larger circumferential groove at the end of the broach to pull the broach through a workpiece without any vertical drop of the broach in the puller mechanism during any part of the broaching operation. To accomplish this a piston assembly is mounted at the bottom of the broach pulling mechanism to allow the end of the broach to bottom thereon. The piston assembly is controllably pressurized to lock a wall of the groove of the broach end between the puller jaws and the piston assembly thereby preventing any movement or dropping of the broach due to a loose fit of the jaws with respect to the groove throughout the entire broaching operation.

REFERENCES:
patent: 2135861 (1938-11-01), Thompson
patent: 2165588 (1939-07-01), Thompson
patent: 2338989 (1944-01-01), Welte
patent: 2403100 (1946-07-01), Geren

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