Chip Formation of Ceramic Tools in Metal Cutting

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J. Korean Ceram. Soc. > Volume 31(11); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(11): 1355.

절삭가공에서 세라믹 공구의 칩형상에 관한 연구

노상래, 안상욱

인하대학교 기계공학과

Chip Formation of Ceramic Tools in Metal Cutting

ABSTRACT

With the availability of ceramics (Al2O3, Al2O3-TiC), it is possible to machine very hard steel at different cutting conditions. When hardened steel STD 11 is turned using ceramic tools, chip formation is observed conical-herical and arc chips with a cyclic saw toothed type. The main cause of saw toothed chip formation is observed conical-herical and arc chips with a cyclic saw toothed type. The main cause of saw toothed chip formation is found to be periodic gross shear fracture extending from the free surface of the chip toward the tool tip. In regard to chip control, ceramic Al2O3 is superior to the other cutting tools. The roughness of machined surface was getting worse with increasing of cutting speed and feed.