Internal pull broach with indexable inserts

Details Internal pull broach with indexable inserts Internal pull broach with indexable inserts

1994-05-24

1997-05-13

Rachuba, M.

Cutters, for shaping

Rectilinear broach

Including holder having seat for inserted tool

407 18, B23D 4304

Patent

active

056285892

ABSTRACT:
An internal pull broach is disclosed for roughing, semi-finishing and finishing at least one wall in a workpiece during a single stroke machining operation. The broach includes an elongated cutting tool holder having a longitudinal axis and a plurality of laterally extending, longitudinally spaced pockets. Cutter inserts are disposed in each of the pockets to define a plurality of sequentially acting protuberances. Each protuberance has a cutting edge extending laterally with respect to the longitudinal axis of the tool holder substantially across an entire width of the tool holder for progressively cutting into the wall of the workpiece sequentially as the tool holder moves during the single stroke along a fixed path coaxial with the longitudinal axis of the tool holder. Preferably, the longitudinally spaced pockets are subdivided into groups having unique configurations or fastener patterns, so that corresponding cutter inserts having identical configurations or fastener patterns are independently indexable and replaceable within corresponding pocket configurations, while being interchangeable only within a respective pocket configuration group.

REFERENCES:
patent: 1370837 (1921-03-01), Perkins
patent: 3317984 (1967-05-01), Jacobson
patent: 4243347 (1981-01-01), Clapp et al.
patent: 4273479 (1981-06-01), Raupp, Jr. et al.
patent: 4274766 (1981-06-01), Raupp, Jr. et al.
patent: 4740115 (1988-04-01), Hertel et al.
patent: 5242251 (1993-09-01), Armstrong et al.
J.P. Tool, R-I-B-1000.RTM. Broaching.

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