Multi-process Continuous Simulation Analysis and Optimization of High-precision Valve Sleeve in Machining Process
Taking the typical components of the high-precision nitrogen-seepage oil distribution valve sleeve of the aviation fuel pump as an example,a combination method of multi-process continuous simula-tion(CAE)and residual stress detection(XRD)was used to simulate the four process processes of blank rolling,normalization heat treatment,mechanical processing and nitriding,and the accuracy was verified by combining the detection results of each process.The variation law of residual stress and deformation of the workpiece during the process was studied.The results indicated that selecting the hot-rolled bars with a small amount of blank removal as the valve sleeve blank could effectively reduce the fluctuation of residual stress values and reduce the accumulation formed during the subsequent nitriding process.In the mechani-cal machining turning process,the feed rate had a greater impact than that of cutting speed,with the opti-mal parameters being a feed rate of 0.06 mm and cutting speed of 900 mm/s.After removing the sandblast-ing process and addition of vibration aging treatment before nitriding,the difference in residual stress be-fore and after nitriding was further reduced.The actual measured deformation was 0.007 0 to 0.009 3 mm,which was less than the tolerance requirement of 0.01 mm,and the simulated deformation value matched well with the measured value.
万方数据
维普
