中文摘要：

采用商业有限元DEFORM-3D软件，建立了三维微细铣削加工模型，利用该模型动态模拟了硬质合金微径铣刀铣削加工2A12工件时刀具的磨损变化形态。结果表明，与常规刀具磨损形态不同，微径铣刀的磨损主要发生在刀尖处，后刀面磨损形态为近似三角形。针对这一特点，提出利用后刀面刀尖处的最大磨损高度hmax判断微径铣刀磨损量的方法，研究铣削方式对刀具磨损量影响的变化规律。仿真结果可用于预测刀具磨损变化规律，为微细铣削加工参数的优化、微径铣刀的合理选用、设计及进一步有效控制刀具磨损提供研究手段。

英文摘要：

Commercially available software DEFORM-3D was used to develop a three-dimensional micro-milling finite element model for dynamic simulating the wear of cemented carbide micro-diameter cutter while machining aluminum alloy 2A12. The results showed that the wear patterns of micro-diameter cutter were different from that in conventional machining. Namely, wear of micro-diameter cutter in micro-milling mainly occurred at tool nose and the wear pattern of rake face showed triangle shape. According to this characteristic, a new method for measuring wear of micro tool was put forward to measme the maximum height （hmax） of rake face at tool nose. The variation of milling style on tool wear was investigated by using this method. The numerical simulation results can be used for predicting and controlling tool wear, processing parameter optimization, and optimizing selection of micro-diameter cutter.