Machine for relief grinding tap threads

Details Machine for relief grinding tap threads Machine for relief grinding tap threads

1980-12-17

1982-11-16

Kunin, Stephen G.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51 95TG, 51101R, 51288, 409 75, 409 76, 10 89R, 10105, B24B 1702

Patent

active

043589111

ABSTRACT:
A relief thread grinding machine for making screw taps wherein a workpiece 10 is clamped to a resiliently mounted body 5 of a longitudinally adjustable sled 1. The body carries a follower wheel 17 which bears on a cam roller 15 rotatably mounted on the sled. The surface of the cam roller is eccentrically lobed so that when it is axially moved varying oscillation strokes of the body 5 are produced. The cam roller can be axially adjusted as needed during the grinding process so that the amount of relief grind can be changed. In this manner it is possible to provide the conical thread on the lead end of a tap with a different relief grind than the generally cylindrical and posteriorly weak conical thread on the guide end of the tap.

REFERENCES:
patent: 1389835 (1921-09-01), Lecombe
patent: 2053866 (1936-09-01), Flygare
patent: 3023546 (1962-03-01), Beck
patent: 3080684 (1963-03-01), Stade et al.
patent: 3267616 (1966-08-01), Stade et al.
patent: 3905156 (1975-09-01), Vogelsanger
patent: 3943664 (1976-03-01), Broide et al.
patent: 3994099 (1976-11-01), Palmer

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