Importance

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Abstract

A broaching insert, such as a slotter or semifinisher, which cuts through a workpiece is configured such that side cutting edges of the broaching insert contact the workpiece simultaneously. If the broaching insert is a slotter, a center portion of the cutting edge which interconnects the side cutting edge makes contact with the workpiece ahead of the side cutting edges. If the insert is a semi-finisher, the side cutting edges are scalloped so as to reduce shock upon engagement with the workpiece. The broaching insert is ideally suited to the cutting of workpieces oriented obliquely relative to the direction of cutting. In order to minimize snap-back of the broaching insert as it exits the workpiece, the broaching insert is sequentially passed through back-up disks of gradually diminishing hardness, whereby the compressive loading on the insert is relieved gradually.

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First Claim