【摘 要】
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Electrochemical machining(ECM)is an economical and effective method for blisk man-ufacturing and includes two steps:channel machining and profile machining.The
【机 构】
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National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of A
论文部分内容阅读
Electrochemical machining(ECM)is an economical and effective method for blisk man-ufacturing and includes two steps:channel machining and profile machining.The allowance distri-bution after the channel machining will directly affect the profile machining.Therefore,to improve the uniformity of allowance distribution in the machining of channels,a method that incorporates a variable feed rate mode is developed.During the machining process,the feed rates are dynamically changed according to the needs of the side gap at the different feed depths.As a result,the side gaps at the different feed depths vary,contributing to a decrease in the allowance difference.In this study,the dissolution processes of a blisk channel are simulated using different feed rates,and pre-diction profiles are obtained.Based on the prediction profiles,the relationship among the feed rate,feed depth,and side gap is established.Then,the feed rates at different feed depths are adjusted according to the relationship.In addition,contrast experiments are conducted.Compared with blisk channel ECM using a constant feed rate of 1 mm/min,using the variable feed rate decreases the allowance differences in the convex and concave parts by 62.2％and 67.4％,respectively.This indicates that using the variable feed rate in the ECM process for a blisk channel is feasible and efficient.
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