Abstract
Recently carbon fiber reinforced plastic (CFRP) is considerably employed as structure material in airline industry because of its higher specific strength. At the present day, the principal process of CFRP machining is cutting. Usually, a cutting tool wedge angle is set to small one in the case that fibrous material is machined. However CFRP contains hard carbon fibers which lead tool edge to be damaged and then tool fracturing makes rapid progress during the processing. This causes fibers to remain on machined surface and it is a serious problem in cutting of CFRP. In order to reduce tool edge fracture, tool with a large tool wedge angle and a negative rake angle was employed. It is found that fracture of the tool edge in the case of a large wedge angle is smaller than that of the conventional tool.
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