PURPOSE: To prevent the formation of impression flaws and burr and to improve the accuracy of a notch machining part by providing dummy members for holding a test piece at both side-ends of a test piece in the cut-advancing direction, and thereafter forming cut grooves.
CONSTITUTION: A test piece 1 is conveyed into a matching center, the surfaces A-D are machined so as to make fixing with jigs accurate, and deburring is performed at the angular parts of the machined parts. After the machined parts are fixed with fixing jigs 2, the material-taking part of the test piece 1 is machined. Furthermore, the scrap parts (parts used as dummy materials 6) at both ends of the test piece 1 are cut out. The finishing machining of the cut rough-surface parts is performed, and the test piece 1 is fixed 2 with two dummy materials 6 so as to hold the test piece 1 from both sides. In this state, a notch cutter 3 is used, and the grooves are cut in the order of the dummy material 6 - the test piece 1 - the dummy material 6, and the notch machining is performed to obtain the completed test piece 1. Impression flaws and burr, which are liable to occur at the edges on the input/output sides of the cutter 3 at the notch parts of the test piece 1, can be effectively prevented.
KANEHARA YOSHIO
NAKAMURA KAZUO
TOKKI KK
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| JP61184630B | ||||
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| JPS6440208A | 1989-02-10 | |||
| JPS56118836A | 1981-09-18 | |||
| JPS6069451A | 1985-04-20 | |||
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| JP43003879A |