异形曲面钛合金零件铣削加工缺陷研究及仿真分析

Research and Simulation Analysis of Milling Defects of Profiled Surface Titanium Alloy Parts

采用荧光渗透无损检测技术对某异形曲面钛合金零件铣削加工后,发现其存在严重的表面质量缺陷。从球头铣刀与零件接触面塑形堆积变形效应、滑擦现象以及摩擦温度对工件表面的影响3个方面进行理论研究。在有限元ABAQUS环境中对出现缺陷区域进行模拟铣削加工,计算加工过程中缺陷产生时的应力数值。经过对比横向和纵向铣削模拟结果,发现2种加工方式出现的最大应力数值有较大差别。根据模拟结果开展铣削走刀对比实验,变更铣削走刀工艺后发现采用纵向铣削方式可以大大减小铣削缺陷区域的应力值,同时经检测后发现零件缺陷问题也随之消失。

After the non-destructive testing technology of fluorescent penetrability was used to mill a special-shaped curved titanium alloy part, it was found that it had serious surface quality defects. The theoretical study was conducted from the three aspects of forming and deformation effect, sliding phenomenon and the influence of friction temperature on the workpiece surface. In the finite element ABAQUS environment, the defect area is simulated and milled to calculate the stress value during the production of the defect. After comparing the horizontal and vertical milling simulation results, it was found that the maximum stress values for the two processing methods are quite different. According to the simulation results, the comparison experiment of milling passes was carried out. After changing the milling pass technology, it was found that the longitudinal milling method can greatly reduce the stress value in the milling defect region. At the same time, the defects of the components disappeared after the inspection.