切削表面の塑性流動量を考慮した切削機構

概要

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On the basis of the fact that the main cause of the formation of a deformed layer remaining on a machined surface is the extension of the shear zone to below the intended depth of cut, the relationships between the plastic flow remaining on the machined surface and the cutting parameters are analyzed using a simplified cutting model and confirmed experimentally by low-cutting-speed orthogonal cutting tests on 60-40 brass and aluminum. The following results were obtained. We found that the plastic flow is approximately proportional to the product of the shear strain of the chip and the depth of cut. The proportional coefficient is the ratio of the shear strain in the deformed layer to the shear strain of the chip. Furthermore, the plastic flow is approximately proportional to the chip thickness and to the main cutting force per unit cutting width. In addition, the specific cutting force is approximately proportional to the shear strain of the chip.
2009-03-05