Gear cutting – milling – or planing – Broaching – With means to cyclically manipulate cutter or cutter support
Patent
1978-05-30
1980-01-01
Briggs, William R.
Gear cutting, milling, or planing
Broaching
With means to cyclically manipulate cutter or cutter support
409266, 409267, B23D 4104
Patent
active
041814584
ABSTRACT:
The invention relates to a multiple-broach broaching machine for broaching a pattern of holes formed in a workpiece. This machine comprises means for moving and positioning the workpieces on the broaching machine, means for pulling the broaches and means for following the broaches, said pull means and follower means co-acting with the opposite ends of the broaches, respectively, to ensure their passage through the holes of the workpieces to be broached from one side to the other side of the workpieces, said pull means and follower means being provided for two similar sets of broaches adapted to operate simultaneously in opposite directions. A handling device is associated with said sets of broaches on either side of the plane in which the workpieces are positioned, for the purpose of transferring each set of broaches, by turning same through 180.degree., from said pull means to the adjacent follower means at the end of each pass. Thus the broaches of each set operate by making successive working passes in opposite directions, the workpieces being simply repositioned in the gap between said passes according to the desired broaching action.
REFERENCES:
patent: 1437856 (1922-12-01), Myers
patent: 2212737 (1940-08-01), Hart
patent: 3087389 (1963-04-01), Bonnafe
patent: 3550504 (1970-12-01), Fulks
Briggs William R.
Regie Nationale des Usines Renault
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