One chuck grinding apparatus for end milling cutters and the lik

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

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51225, B24B 304

Patent

active

041342356

ABSTRACT:
Apparatus for manually sharpening the bottom, radially divergent, flute ends or cutting edges of an end milling cutter (hereinafter referred to as an "end mill") which apparatus includes: a stationary, beveled disc-type or plain grinding wheel mounted for rotation about a horizontal axis (or y-axis), so as to present the face of the wheel to an operator, and a tool-holding fixture having a base member mounted on the worktable of a conventional tool grinder. The worktable of the grinder is capable of movement along three axes, namely a longitudinal axis (or x-axis), a horizontal axis (or y-axis) toward and away from the circular face of the disc, and a vertical axis (or z-axis), by manual manipulation of individual table-adjusting wheels. The fixture includes a workhead mounted on a carriage which in turn is translatably mounted for linear to and fro motion, on a base member with bearing means. The workhead is mounted on the carriage for pivotable movement about a longitudinal axis (x-axis). An end mill holder comprising a bushing or collet is rotatably disposed in the workhead so that the end mill may be rotated about the end mill's longitudinal (vertical) axis. The end mill is held in a vertical plane, and index plate means are preferably provided for indexing each cutting tooth or edge of an end mill along the y-axis before it is sharpened. Once the end mill is locked into the holder, or "chucked," the end mill may be dished and gashed, and primary and secondary clearances of the flute ends may be provided, all without removing the end mill, hence the "one chuck" designation.

REFERENCES:
patent: 2332510 (1943-10-01), Franzen
patent: 2401874 (1946-06-01), Kilbride
patent: 2690037 (1954-09-01), Meyer
patent: 3365843 (1968-01-01), Robinson
patent: 3624718 (1971-11-01), Ribich
patent: 3680263 (1972-08-01), Johnson
patent: 3722148 (1973-03-01), Grahn

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