Broaching apparatus and methods

Details Broaching apparatus and methods Broaching apparatus and methods

1990-06-11

1993-01-05

Bilinsky, Z. R.

Gear cutting, milling, or planing

Broaching

Process

407 15, 407 17, 409268, B23P 1542

Patent

active

051764806

ABSTRACT:
A broaching insert, such as a slotter or semifinisher, which cuts through a workpiece is configured such that side cutting edges of the broaching insert contact the workpiece simultaneously. If the broaching insert is a slotter, a center portion of the cutting edge which interconnects the side cutting edge makes contact with the workpiece ahead of the side cutting edges. If the insert is a semi-finisher, the side cutting edges are scalloped so as to reduce shock upon engagement with the workpiece. The broaching insert is ideally suited to the cutting of workpieces oriented obliquely relative to the direction of cutting. In order to minimize snap-back of the broaching insert as it exits the workpiece, the broaching insert is sequentially passed through back-up disks of gradually diminishing hardness, whereby the compressive loading on the insert is relieved gradually.

REFERENCES:
patent: 3641642 (1972-02-01), Schmidt
patent: 3795958 (1974-03-01), Psenka
patent: 4243347 (1981-01-01), Clapp et al.
patent: 4564320 (1986-01-01), Roselip
patent: 4993889 (1991-02-01), Kelm

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