Thermal Shock Resistance Analysis of Micro-textured Ball Nose Milling Cutter

Abstract

Under intermittent milling, rapid temperature changes form thermal stress, and if the thermal stress is too large, cracks will occur inside the tool, and at the same time, the strength will drop sharply, which will eventually lead to tool fatigue failure. Thermal shock corresponds to the occurrence of crack propagation. For the effect of thermal shock on carbide ball end milling cutters, first, the quench-strength method was used to explore the effect of residual flexural strength of specimens with different micro-texture parameters on thermal shock resistance. Then, by combining the tool milling temperature test and thermal coupling simulation, the changes of different micro-texture parameters on the thermal stress of the tool were explored to reveal the effect of thermal stress on thermal shock resistance.