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Metal Working

Cutting-insert

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Cutting insert

Details

Inventors: Nishi, Masami;
Assignee: Kyocera Corporation (Kyoto, JP)
Primary Examiner: Terrell; William E.
Assistant Examiner:
Attorney, Agent or Firm: Spensley Horn Jubas & Lubitz

A cutting insert comprising three or more upheaved portions having a height of 0.01 to 0.1 mm on at least one rake surface of the insert. The cutting insert can be stably secured by the support effect of the upheaved portions. In addition, stress concentration due to cutting impact does not occur and generation of breakage is reduced greatly, whereby even the cutting chip warped by case-hardening can be used for cutting without grinding.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide a novel cutting insert which is not broken and does not require grinding even if the cutting insert is case-hardened.
The structure of the present invention is explained below referring to the accompanying drawings.

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