EDGE REPLACEABLE CHIP AND FIXING STRUCTURE OF CIRCULAR CHIP

摘要

PROBLEM TO BE SOLVED: To provide an edge replaceable chip rotating a circular chip at a fixed rotation angle for avoiding to reuse a spent cutting edge part and to dispose it with a cutting edge left unused. SOLUTION: This edge replaceable chip is provided with an inverse truncated pyramid recess in a cutting face 2 and an angleθof 30°-85°formed between a slant face and the cutting face 2 of the inverse truncated pyramid. This circular chip 1 is fixed by a holder and a presser. The holder is provided with a screw hole for a cap screw, a first sliding surface for fixing the circular chip and a notch for holding the circular chip formed in its tip. The circular chip presser is provided with a circular chip lead-in pin, a long hole for the cap screw and a second sliding surface for fixing the circular chip. When the circular chip presser is fastened to the holder by the cap screw, the presser moves downward and rearward along the first sliding surface to press-contact the first sliding surface and the second sliding surface and firmly hold the circular chip. COPYRIGHT: (C)2004,JPO