Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1985-07-16
1987-02-17
Olszewski, Robert P.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51219PC, 51288, B24B 328, B24B 332
Patent
active
046429425
ABSTRACT:
Described herein is an apparatus for grinding a twist drill bit, especially for web thinning and split pointing of the tip of a twist drill. The apparatus includes a grinding disk and a drill bit holder movable relative thereto mounted on a support. The support may execute relative motion with respect to the grinding disk under cam control in two coordinates and using a grinding disk having an invariable profile, in order to produce tip grinding patterns of various types. Preferably, the cam control is performed by means of interchangeable templates so that it is possible, using only a single grinding disk, no longer subject to the necessity of dressing, to produce a multiplicity of tip surface patterns that are optimally adapted to the given drill bit geometry.
REFERENCES:
patent: 2477135 (1949-07-01), Marker et al.
patent: 2632983 (1953-03-01), Kapnick
patent: 2797538 (1957-07-01), Studler
patent: 3209493 (1965-10-01), Houser
patent: 3621613 (1971-11-01), Grob et al.
patent: 3751856 (1973-08-01), Jorgensen
patent: 3788009 (1974-01-01), Williams et al.
Guhring Gottlieb
Handal Anthony H.
Olszewski Robert P.
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