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US 4,181,458 AGranted
Multiple-broach broaching machine
AssigneeRegie Nationale des Usines Renault
InventorChristian Roturier
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AssigneeRegie Nationale des Usines Renault
InventorChristian Roturier
Estimating the term…
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.
Multiple-broach broaching machine for broaching a pattern of holes in a workpiece comprising at least two pairs of broaches, means coacting with the opposite ends of one of the pairs of broaches for pulling and following that pair from a first starting position through the plane of the workpiece to be broached to a first end position;
Dependencies are inferred from the claim text.