Three-dimensional cutting force analysis based on the lower boundary of the shear zone. Part 2: Two edge oblique cutting

• Published in: International journal of machine tools & manufacture Vol. 36; no. 3; pp. 325 - 338
• Main Author: Venuvinod, Patri K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1996
• ISSN: 0890-6955; 1879-2170
• DOI: 10.1016/0890-6955(95)00070-4

The problem of partitioning the overall cutting force between the two active cutting edges in two edge oblique cutting, although of crucial importance in modelling the temperature and wear rates prevailing in form cutting, has so far eluded solution. This paper presents two solutions to the problem: one utilizing the Merchant shear plane (MSP) approach and the other utilizing the solution developed in Part 1 for single edge oblique cutting based on the lower boundary (LB) of the shear zone. Both approaches avoid the anomalies encountered in previous attempts at solving the partitioning problem. This was done through the simultaneous application of the principles of chip equilibrium, force-velocity collinearity and chip interaction. Arguments are presented to indicate that the LB approach is more reliable than that of the MSP approach. Further, the LB approach is able to predict the power component of the overall cutting force in two edge cutting just as in the case of single edge cutting.