Thermal Characteristics Analysis of Hardened Steel Die Transition Region in Machining Process

Abstract

Due to the transition region with different hardness, the milling process of assembled hardened steel die is prone to generate flutter, which is hard to ensure surface integrity of workpiece. By establishing the finite element model, the milling process of assembled hardened steel die was calculated by the finite element method. Effects of cutting parameters on milling force and milling temperature were achieved by the above finite element analysis. The laws of the stress and the thermal field distribution in the assembled transition region are analyzed and discovered. The analysis results demonstrate that milling force and milling temperature of the transition region changes in step leaping way. There is a close relationship between processing stability and cutting parameters. The stress and the thermal distribution of the transition region have a significant difference due to the changes in material hardness.

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