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

Abstract

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°.