End mill with throw-away tip

Details End mill with throw-away tip End mill with throw-away tip

1985-12-31

1987-09-15

Godici, Nicholas P.

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 53, 407 54, 407113, 407114, 408205, 408713, B23C 520

Patent

active

046936416

ABSTRACT:
An end mill comprises an end mill body and a throw-away tip mounted on a forward end of the end mill body so as to be spaced from an axis thereof. A core receiving recess is formed at a center of a forward end face of the end mill body and has a size equal to or greater than a distance between the throw-away tip and the axis of the end mill body. The throw-away tip has an end cutting edge formed by a cutting edge ridge located adjacent the forward end of the end mill body and extending from an outer peripheral side of the end mill body toward an inner peripheral side thereof, and outer and inner peripheral cutting edges respectively formed by cutting edge ridges respectively extending from outer and inner peripheral ends of the end cutting edge toward a rearward end of the end mill body. The end mill body may mount at least two throw-away tips disposed symmetrically with respect to the axis thereof.

REFERENCES:
patent: 3486211 (1969-12-01), Greenleaf
patent: 3551978 (1971-01-01), Berry, Jr.
patent: 3896532 (1975-07-01), Brooks
patent: 4077735 (1978-03-01), Dick et al.
patent: 4131383 (1978-12-01), Powers
patent: 4188162 (1980-02-01), Zweekly
patent: 4220429 (1980-09-01), Powers et al.
patent: 4278373 (1981-07-01), Wolfe, III
patent: 4367991 (1983-01-01), Grafe et al.
patent: 4373839 (1983-02-01), Negishi et al.
patent: 4529339 (1985-07-01), Shimomura et al.
patent: 4616964 (1986-10-01), Nomura

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