Finite Element Analysis And Compensation Used In Size Error Of Slender Shaft Research

Shaft parts occupy a considerable proportion of the field of mechanical industry. It is akind of indispensable important parts and mainly used to support rotary parts and transmittorque or movement. It is used in many fields, whereas among these shaft parts have a veryspecial shaft, which the length-diameter ratio of shaft is greater than20, it is defined asslender shaft. It is extremely easy to generate bending deformation for its largelength-diameter ratio、poor rigidity and vibration or other factors, therefore slender shaft isdifficult to meet design accuracy. With the developing of high-tech, the designing andmanufacturing precision of parts are made higher requests. According to the traditionalprocessing method is not easy to process to meet the requirement of design precision‘sslender shaft. So looking for new ways or approaches become research emphasis in the futurein order to improve the machining accuracy of slender shaft.In order to improve the machining accuracy of slender shaft which is mainly to improvethe dimensional accuracy.This paper uses the theoretical-simulation-experimental verificationmethod of logical analysis.Firstly, many factors which causes the dimensional error of slendershaft are analyzed via domestic and foreign references, there are mainly factors includingbending deformation and thermal deformation; Secondly, the bending model of radical forceand the thermal deformation model of tool and work-piece are established and the theoreticalequation of relieving amount which about cutting parameters、material、thermal expansioncoefficient of tool,etc, is deduced. The radial force is measured by DEFORM software, itprovides simulation parameters for the next chapter ANSYS simulation. Besides, theDEFOMR simulation results show that the tool temperature rise T is increasing with time,however, in the cutting early, the temperature rise Tis sharply ascend and tends to thermalequilibrium value; the slender shaft is performed statics analysis by ANSYS. By comparingthe relieving amount value from static analysis via ANSYS with the theoretical value, theresults show that they have a high degree of consistency and theoretical equation of relievingamount is optimized the by MATLAB, the more precision relieving amount compensationprediction equation is obtained.Finally, the paper introduces a method of error compensation and the precision relievingamount compensation prediction equation is used in NC machining, experimental resultsshow the optimization relieving amount equation can significantly improve dimensionalprecision of slender shaft, Not only is this study goal achieved, but also it provides theimportant reference basis for the further study on the dimensional accuracy of slender shaft.