Tooth rest for cutter grinder

• US 4,531,328 A
• Filed: 09/28/1984
• Issued: 07/30/1985
• Est. Priority Date: 02/07/1983
• Status: Expired due to Fees

• Current Assignee: Bryce D. Jewett
• Original Assignee: Bryce D. Jewett
• Inventors: Jewett, Bryce D.
• Primary Examiner(s): Whitehead, Harold D.
• Application Number:
  US06/655,238
• Time in Patent Office: 305 Days
• Field of Search: 51/288, 51/225, 51/238 T, 33/185 R, 33/201
• US Class Current: 451/409
• CPC Class Codes: B24B 3/025 Tooth rests; Supporting means for milling-cutter grinding machines

Abstract

A method for the precision sharpening of the cutting edges of a fluted milling tool having a cylindrical cutting head, and apparatus for positioning the milling tool during sharpening. The method involves supportively contacting the flutes with an abutment finger capable of adjustable movement in a path perpendicular to the axis of the tool, whereby the cutting edge is accurately presented to a grinding wheel. The apparatus provides means whereby the position of the abutment finger may be controlled to provide cutting edges of a predetermined angle for tools of various diameter.

Claims

1. Apparatus for positioning a milling tool having a number of cutting edges in a circular cylindrical array, said apparatus being comprised of

(a) a housing having a substantially flat base adapted for mounting to a horizontal support surface, and first and second side extremities,

(b) a channel disposed perpendicularly to said base adjacent said first side extremity,

(c) elongated pedestal means slideably engaged by said channel,

(d) an elongated abutment finger extending upwardly from said pedestal means,

(e) threaded adjustment means adapted to cause vertical movement of said pedestal means within said channel,

(f) locking means associated with said channel adapted to controllably prevent movement of said pedestal means, and

(g) selector means comprising (1) a threaded rod rotatably journaled to said pedestal means and extending perpendicularly therefrom above said base to slotted engagement with said second side extremity, (2) an upwardly directed pointer adapted to be moved horizontally in response to rotational movement of said threaded rod, (3) a lever scale pivotably mounted above said threaded rod and having a straight lower edge adapted to rest by gravitational force upon said pointer, said lever scale having a pointed free extremity and a series of uniformly spaced markings representing linear distance corresponding to the diameters of milling tools to be sharpened, and (4) a stationary scale of markings corresponding to degrees of angle of a cutting edge, said scale being associated with said second side extremity and positioned adjacent the pointed free extremity of said lever scale, whereby

(h) when the horizontal position of the pointer is adjusted so as to reside under that site of the lever scale representing the diameter of the milling tool to be sharpened, vertical adjustment of the pedestal, with attendant vertical movement of said pointer and finger causes the pointed free extremity of said lever scale to indicate the sought angle of sharpening on said stationary scale and causes the elevation of the abutment finger to be exactly appropriate to support said milling tool for securement of the sought angle of sharpening of said cutting edges.

2. The apparatus of claim 2 wherein said channel is of generally prismatic or cylindrical configuration.

3. The apparatus of claim 2 wherein said lever scale and stationary scale are substantially coplanar and vertical to said base.