Internal broaching machine and internal broach

Details Internal broaching machine and internal broach Internal broaching machine and internal broach

2006-04-04

2006-04-04

Ashley, Boyer D. (Department: 3722)

Gear cutting, milling, or planing

Broaching

Cutter support or guide

C409S281000, C407S013000

Reexamination Certificate

active

07021874

ABSTRACT:
A broach for internal broaching is formed on its pull end and/or follower end with a tapered surface machined with high accuracy. A pull head and/or a retrieving head of a broaching machine, which drivingly grip the pull end and the follower end the broach, is formed with a tapered inner surface complementary to the tapered surface of the broach. The pull head and the retrieving head grip the broach while pressing and clamping their tapered inner surface against the tapered surface, and these heads and the broach are firmly connected together. Clearances or gaps between the heads and the broach are thus eliminated, concentricity between the heads and the broach is significantly improved, and broaching can be performed with high accuracy.

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Patent Abstracts of Japan, Publication No. 06-126526.

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