Metal injection molded rotary metal cutting tool

Details Metal injection molded rotary metal cutting tool Metal injection molded rotary metal cutting tool

1991-06-12

1992-10-06

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

470198, B23B 5100

Patent

active

051526425

ABSTRACT:
A rotary metal cutting tool for forming threads on the insides of a bore, drilling a bore or otherwise shaping a bore, which tool is fabricated from a metal injection molded blank of appropriate tool steel to provide improved tool wear. The tool, which may be a tap, includes a transverse stress relief ring for reliably localizing the point of tool failure under overstress conditions. A polygonal, e.g., hex, surface on the shank provides means for engaging the shank with an extraction tool to remove the broken remains of the tool from the bore after the tool fails. A conventional O-ring seal is installed in the stress relief ring to provide protection from flying metal particles upon failure.

REFERENCES:
patent: 1776525 (1930-09-01), Talbot
patent: 2101347 (1937-12-01), Robinette
patent: 2740974 (1956-04-01), Lewis
patent: 2761298 (1956-09-01), Jarvis
patent: 3458882 (1969-08-01), Kelly
patent: 4113480 (1978-09-01), Rivers
patent: 4762444 (1988-08-01), Mena
Tool and Manufacturing Engineers Handbook, vol. 1, Machining, Society of Manufacturing Engineers, 1983, pp. 3-11 to 3-13.

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