Correlation Characteristic Research on Orthogonal Cutting the Plastic Metal Material-C10100 with Negative Rake Angle Tool

Abstract

With the high-speed development of the delicateness grinding, mechanical scratching and micro-cutting technology, scholars have become more and more interested in the forming mechanism and related characteristics of the negative rake angle tool. Based on DEFORM-2D forming software, this paper investigates the forming mechanism and related characteristics of the negative rake angle tool. Through the simulation comparison analysis, it is clear that as the negative rake angle decreased form 0° to 60° (the negative rake angle does not attain to the critical value), the shear angle becomes smaller, the ability of the chip formation in the front of the tool surface becomes weaker, the chip shape becomes blunter, the action state of the tool effect on the material is cutting and ploughing, and the tangential force and normal force increase, significantly. When the negative rake angle reaches the critical value (no chip formation, negative rake angle is approximately equal to -80°), the shear angle is approximately equal to 0°, no chip formed in front of the tool surface, the tool pure ploughing the material, and the tangential force and normal force both show a significant downward trend. Meanly, a triangular stagnant region appears in front of the tool surface when the negative rake angle decreased form -20° to -80°.

Study of deformation behavior of plastic metal materials during laser-assisted micro-imprinting formings

“…Subsequent material flow will move along the edges of this zone towards both sides, a direction also indicated by the material flow in figure 7. The microhardness within the stagnation zone tends to align with that of the base material [14]. The initial hardness of T2 copper is 80 HV, and the hardness is increased after machining because the laserassisted imprint machining technology differs from orthogonal turning in that the lower boundary is not an open boundary condition, but is supported by a hard substrate.…”

“…The results of Ozturk [12] and Anilchandra [13] have shown that the creation of stagnation zone improves the surface quality of the workpiece. Ding [14] discovered that the hardness of the machined surface within the stagnation zone was notably lower compared to that within the plastic flow zone during scratching. This finding suggests that the influence of the stagnation zone can mitigate the extent of work hardening and strain strengthening of the material surface.…”