Fixture for holding a hole-cutting tool having cutting edges to

Details Fixture for holding a hole-cutting tool having cutting edges to Fixture for holding a hole-cutting tool having cutting edges to

1987-07-13

1988-09-13

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51218A, B24B 326

Patent

active

047699558

ABSTRACT:
This invention relates to a fixture for holding twist drills having cutting edges to be ground. A stand is mounted on a base plate, which is displaceable and/or rotatable. The stand carries a bracket, which carries gripping unit for gripping the drill to be ground. The gripping unit comprises two gripping jaws and is adapted to be detachably mounted on the bracket in two predetermined positions. The bracket is formed with angle-section track grooves for guiding the gripping unit. Each gripping jaw comprises two outer edges, which extend along said track grooves, and adjacent to said outer edges is formed with two angle-section guides, which are adapted to interengage with said track grooves and to be slidably guided by said track grooves. The bracket is provided with a thrust screw for clamping the angle-section guides in the track grooves. A grinding apparatus is also disclosed, which comprises a grinding unit carrying a grinding wheel and in which the base plate is movable relative to the grinding unit.

REFERENCES:
patent: 3521405 (1970-07-01), Mackey, Jr. et al.
patent: 4270315 (1981-06-01), Reiling et al.
patent: 4547999 (1985-10-01), Reiling et al.
patent: 4646474 (1987-03-01), Chen
patent: 4716688 (1988-01-01), Reiling et al.

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