Study On The Technology Of Turn-milling The Large Diameter And Thick Wall Pipe

At present,the traditional process method of turning excircle and boring internal is used in rough machining the large diameter and thick wall pipe, because of the large diameter and thick wall pipe is generally longer and uneven thickness of the blank, the problem such as the large cutting vibration, serious tool wear, chip removal difficult, “collapse knife" etc. exist in processing, therefore the processing efficiency is low, the cost is high.In view of the problems exist in the traditional processing method, efficient turn-milling machining method is proposed for rough machining of large diameter and thick wall pipe. Through study on the turn-milling processing technology of large diameter and thick wall pipe, decided to adopt eccentric orthogonal turn-milling machining cylindrical surface of large diameter and thick wall pipe, using axial turn-milling process the inner hole surface.According to the large diameter and thick wall pipe cylindrical and inner hole turnmilling process technology, to study on process parameter selection and calculation of the efficiency. Through compare with the traditional processing technology of cutting efficiency, get the turn-milling cutting efficiency has a great enhancement than traditional processing methods.Optimizing on the cutting parameters of axial turn-milling. Determine the milling speed、each tooth feeding、effective length of cutting edge as design variables, establish the objective function of the largest metal removal rate. List of constraints according to processing conditions, established the cutting parameters optimization mathematical model of axial turn-milling the large diameter thick wall pipe.Choosing the optimization method based on multi dimensional constrained optimal active-set algorithm of MATLAB,to solve. Verified by examples, the axial turn-milling cutting parameter optimization mathematical model is feasible.