Research On Turn-milling Process Of Slim Shaft Parts

Slim shaft parts are widely used in production and life.In their processing,due to poor rigidity,heat is easily deformed,the machining precision is difficult to be guaranteed.At the same time,in the process of machining,the change of cutting force,the heat transfer of cutting and the drooping of self weight are also easy to cause the bending and deformation of the workpiece.In order to solve this problem,we studied the mathematical model of the trajectory of the long axis of the orthogonal turn-milling with drum error,and analyzed the drum shape error by finite element simulation.The influence of cutting parameters and clamping methods on the drum shape error of slim shaft parts with orthogonal turn-milling is studied.The machining efficiency of slim shaft with turning and turn-milling is compared and analyzed.Firstly,the mathematical model and trajectory equation of the orthogonal turn-milling shaft with drum shape error are established.According to the trajectory equation,the tool path simulation is carried out,and the influence of different clamping modes and cutting parameters on tool path is analyzed.Secondly,according to the change of cut in and out angle under different circumstances,the instantaneous machining number of teeth in orthogonal turn-milling process is analyzed,and the influence rule of instantaneous machining number on cutting force is further studied.Then,through the finite element simulation method,the influence of different clamping modes and different cutting parameters on drum shape error of turning and orthogonal turn-milling is analyzed.Finally,according to the principle of cutting parameters selection,the influence of different cutting parameters on cutting efficiency in turning and turn-milling process is studied.In order to improve the computational efficiency,the operation time of repeated input and calculation is omitted,and the GUI interface is designed.Based on the simulation theory and Simulation of turning and turn-milling machining of slim shaft analysis show that using drum shaped error clamp with top tool clamping is obviously smaller than that by using the chuck and chuck top with center frame;increase the drum shaped error of slim shaft with the cutting speed decreases and with increasing the cutting depth and feed per tooth;the influence of feed per tooth for the drum shaped error is maximum,then is cutting depth,the effect of cutting speed is the minimum;when choose the same cutting parameters,turn-milling machining efficiency ratio.