Finishing throwaway ball endmill

Details Finishing throwaway ball endmill Finishing throwaway ball endmill

1997-08-21

1999-05-18

Han, Frances

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 34, 407 40, 407 49, 407 53, 407 54, B26D1/12

Patent

active

059044489

ABSTRACT:
Finishing throwaway ball endmill has a blade tip adapted to make a firm attachment to a body thereof with easy. The endmill includes a body having a slot formed from an end thereof to a certain depth along an axis thereof, a wedge inserting hole formed in one side thereof and a screw inserting hole formed in the other side thereof both of which are in communication to the slot, and a wedge upper contact formed inside of the wedge inserting hole, a blade tip having a screw pass-through hole, the screw pass-through hole having a tapered wedge lower contact around an edge thereof, and the wedge inserting hole, the screw inserting hole and the screw pass-through hole being aligned when the blade tip is inserted in the slot in the body, a wedge having a fore end and a threaded hole formed in a direction of an axis thereof, the fore end having an upper sloped surface for contact with the wedge upper contact and a lower sloped surface for contact with the wedge lower contact when the wedge is inserted in the wedge inserting hole, and a screw for being threaded with a thread in the threaded hole through the screw inserting hole and the screw pass-through hole.

REFERENCES:
patent: 1881024 (1932-10-01), Lang
patent: 2400856 (1946-05-01), Thompson
patent: 2575239 (1951-11-01), Stephens
patent: 4060335 (1977-11-01), Holloway et al.
patent: 4251172 (1981-02-01), Durand
patent: 4493596 (1985-01-01), Grunsky et al.
patent: 4566828 (1986-01-01), Reinauer
patent: 5064316 (1991-11-01), Stojanovski

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