Helical broaching tool for curved surfaces

Details Helical broaching tool for curved surfaces Helical broaching tool for curved surfaces

B - Operations, Transporting

23

D

77/40

B23D 77/02 (2006.01) B23D 43/04 (2006.01)

Patent

CA 1082497

HELICAL BROACHING TOOL FOR CURVED SURFACES Abstract of the Disclosure A broaching tool is described having an elongated tool body with an arcuate face of preferably half-round configuration. A plurality of recesses are formed on the arcuate face, each having a flat bottom face inclined in- wardly and rearwardly within 1 - 15° of coincidence with the longitudinal axis of the body and an arcuate abutment wall perpendicular to and rearwardly surrounding the flat bottom face. These recesses are arranged in helical paths of increasing diameter in a rearward direction to form a series of spaced helical rows. Each recess contains a rotatably indexable cylindrical cutter disc. This con- figuration of broach has the advantages of providing excellent chip clearance between the cutter and also providing a uniform load on the tool during broaching.

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