转子薄壁保护套的加工方法及仿真分析

Machining Method and Simulation Analysis of Rotor Thin-Wall Protective Sleeve

采用工艺头定位的方式加工转子保护套,在精车时外圆与内孔一次装夹完成加工,保证了零件内外圆的同心度及内孔圆度。在加工转子保护套时分粗车、精车两道工序。精车前进行去氢退火和去应力退火热处理,可以去除工件内的加工残余应力,减小其变形量。对电机转子护套的强度进行有限元分析,结果证实0.5 mm厚度的钛合金转子保护套,采用0.01 mm过盈量与磁钢外圆配合时满足电机的强度要求。

The locating pad to machine was used for the processing of rotor protective sleeve,the excircle and the inner bore of workpiece were once clamping completed when finishing turning to ensure the inner and outer circle concentricity and the roundness of the inner bore.Rotor protective sleeve processing is divided into rough turning and finishing turning.The dehydrogenation annealing and relieved-stress annealing were used before finishing turning to remove the processing residual stress and reduce the amount of deformation.Finite element analysis was carried on the strength of motor rotor protective sleeve.The results confirmed that the titanium alloy protective sleeve with a thickness of 0.5 mm meets the strength requirements when 0.01 mm interference was used to match the magnetic steel cylindrical.