Oblique machining with triangular form tools-II. Experimental investigation

doi:10.1016/0020-7357(78)90006-9

International Journal of Machine Tool Design and Research

Volume 18, Issue 3, 1978, Pages 153-165

https://doi.org/10.1016/0020-7357(78)90006-9 Get rights and content

Abstract

The experimental evidence has confirmed the existence of a common oblique cutting theory for machining vee grooves with triangular form tools and cutting with single straight edge tools. The importance of the tool angles i_F and α_nF suggested by the Model 2 oblique cutting analysis has been experimentally justified. For triangular form tools the profile angles δ₁ and δ₂ will also affect the deformation geometry and other cutting parameters and should be included in form tool specifications. These findings indicate that a general oblique cutting theory for all machining operations should be sought to gain a deeper understanding of these operations and to identify the relevant angles for tool specifications.

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Three-dimensional cutting force analysis based on the lower boundary of the shear zone. Part 2: Two edge oblique cutting
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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.
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Oblique machining with triangular form tools-II. Experimental investigation

Abstract

Int. J. Mach. Tool Des. Res.

Int. J. Mach. Tool Des. Res.

The Machining of Metals