Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1983-12-20
1985-10-22
Olszewski, Robert P.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51206P, 51 95TG, B24B 318, B24B 504
Patent
active
045480001
ABSTRACT:
The threaded portion of a tap drill is formed by mounting a tool blank for rotation about a longitudinal axis and mounting first and second grinding wheels integrally for rotation about a common second longitudinal axis parallel to the longitudinal axis of the tool blank. The tool blank and a first grinding wheel are rotated about the respective longitudinal axes thereof while moved longitudinally with respect thereto, thereby employing grinding ribs of the first grinding wheel to form threads in the blank. The second grinding wheel then is moved closer to the blank and a smooth peripheral surface of the second grinding wheel grinds away outer portions of the threads at an end portion of the tool blank, thus forming a tapered starting end of the tool.
REFERENCES:
patent: 688515 (1901-12-01), Hanson
patent: 1731036 (1929-10-01), Arnold
patent: 2239639 (1941-04-01), Amidon
patent: 2420504 (1947-05-01), Stewart
patent: 2787868 (1957-04-01), Schifando
patent: 3023546 (1962-03-01), Beck
patent: 3267616 (1966-08-01), Stade et al.
patent: 4289110 (1981-09-01), Junker
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