Dimensional Error Analysis And Compensation Of Slender Shaft Turning Processing

Because of the particular structure of shaft parts, it has become a part which can not be replaced in the connection,transmission and other important mechanical structure. The dimension accuracy requirement is also getting higher with the rapid development of industrial technology.Slender shaft as a kind of special workpiece of shaft parts,it is easy to bend in the machining process because of the large length-diameter and poor rigidity,so that the machining accuracy is more difficult to guarantee.According to the traditional processing method is not easy to meet the requirement of processing precision of slender shaft,so it is important to look for a new processing methods to ensure the machining accuracy of slender shaft.To improve the machining accuracy of slender shaft is mainly to reduce the dimensional error. First of all, through analyzing the turning processing research status of slender shaft at home and abroad and its own characteristics, the processing error model of slender shaft is established, concluded that the main factors that influence the slender shaft turning error of the cutting speed, feed rate, back cutting depth. Secondly, using the ANSYS software to simulated the effect of cutting speed and feed rate and back cutting depth on the turning of slender shaft error, providing the basis for the optimization of cutting parameters. In the actual turning process, can use larger cutting speed, feed rate and smaller back cutting depth. Then, taking the minimum cutting time as the optimization objective, as well as taking the dimension error, surface roughness and cutting parameter as optimized constraint, a optimization of slender shaft turning parameters is carried out with the theory of Genetic Algorithm, and the correctness of optimization results are verified through the experiment. Finally, through establishing the PID control model of slender shaft machining accuracy, compensate the error of slender shaft turning processing. Comparing with the ordinary slender shaft turning processing size error, the result show that, PID error compensation turning can significantly improve the accuracy of turning slender shaft.In addition, the result of theoretical analysis, finite element simulation analysis and experiment mutual authentication, which proved the correctness of model and method. The results showed that the method of size error compensation not only could significantly improve dimensional precision of slender shaft, but also provide the important reference basis for the further study on the dimensional accuracy of slender shaft.