Broaching assembly having disposable carbide inserts

Details Broaching assembly having disposable carbide inserts Broaching assembly having disposable carbide inserts

1979-02-28

1981-01-06

Hinson, Harrison L.

Cutters, for shaping

Rectilinear broach

Including holder having seat for inserted tool

B26D 112

Patent

active

042433479

ABSTRACT:
A broach system comprises a plurality of disposable carbide inserts which are precisely positioned and secured within the slot of a broach holder. An elongated side clamp having a shaped contact surface is located along one side of the slot on a sloping surface of the holder. The side clamp is tightened camming the inserts against the side and bottom locating surfaces of the holder. A front clamp is also mounted to the holder and tightened which forces the inserts against a rear stop on the holder. Several holders may be readily assembled in series to perform a complete broaching operation such as dovetail forms in super high strength materials used in gas turbine engines. The broach system replaces the conventional broach design of brazed construction wherein carbide blanks are permanently fastened to a steel holder and it is an improvement over conventional mechanically held inserts. As advantages, the system reduces down time and set-up time. Also, there is lower risk of insert breakage and a resultant increase in tool life.

REFERENCES:
patent: 1440933 (1923-01-01), Perkins et al.
patent: 2378094 (1945-06-01), Nunes-Vaz
patent: 2439822 (1948-04-01), Phaneuf
patent: 2585832 (1952-02-01), Phaneuf
patent: 2846756 (1958-08-01), Novkov
patent: 2855656 (1958-10-01), Poynter
patent: 2930111 (1960-03-01), St. Clair
patent: 3662443 (1972-05-01), Schmidt

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