Research On Machining Technology Of TC18 Titanium Alloy Split Pulley

The split pulleys studied in this project are made of titanium alloy TC18.The split pulleys are the main load-bearing parts on the inner and outer flaps of the aircraft.The parts are large in size and complicated in structure.Most of them are made up of ribs,and materials removal rate is high,the material removal accounted for 90%.Due to the large size of the part,and the residual stress after processing is difficult to release,resulting in the accuracy of the pulley yoke difficult to guarantee.Titanium alloy split pulley yoke processing technology is still in the exploratory stage,processing technology,processing technology,parameter optimization is still not very mature.Split pulley as an important part of the aircraft,the need for in-depth study of its processing technology to improve processing efficiency,processing accuracy and surface quality,which for our country a certain type of aircraft development and production of great significance.The TC18 titanium alloy splitter pulley side panels are studied in this subject,the experiment and theoretical analysis of the pulley side plate are used in processing technology and the deformation factors of the part,and give the corresponding solutions.The main work accomplished by this subject is as follows:Firstly,completed the pulley yoke side of the processing plan.The structure characteristics of the pulley yoke are analyzed,the processing technology is determined,and the machine tools,tools,clamping methods and fixtures are determined according to the structure of the parts and the processing technology.At the same time,based on the detection of parts after processing the content and accuracy,select the processing of testing tools.Developed pulley yoke side of the processing route,preparation of the process rules.Then conducted the pulleys efficient roughing process experiment.In the roughing stage,the material removal rate is high and the processing efficiency is low.In response to this problem,two kinds of processing methods,cycloid milling and rapid milling,are studied.Through the theoretical derivation and experimental research,the maximum cutting force model of cycloid milling is obtained,and the processing parameters of cycloid milling are optimized according to the experimental results.Through the rapid milling processing technology experimental study,to determine the rapid milling processing parameters.Then studied the finishing process of pulley yoke side.The experimental system of finishing machining was established.The relationship between the part surface roughness and the cutting speed,back-eating amount and feed per tooth was explored through the process experiment.According to the experimental results and the actual situation in the enterprise,the finishing process was optimized Processparameters.For improve the quality of the alloy,put forward the deformation control technology of pulley yoke side and optimize the tool path.The factors which lead to the deformation during the process of pulley yoke are analyzed.The method of controlling the deformation is given and the deformation during the process of the pulley yoke is reduced.Optimized the path of the path of the tool path trajectory simulation.Finally,pulley yoke side efficient processing technology engineering verification.According to the previous research,the processing of pulley yoke side parts was carried out,and the high efficiency machining technology of the pulley yoke verified in this paper was verified.The results show that the processing technology can effectively improve the surface machining quality and parts accuracy,improve the machining efficiency and shorten the machining cycle and can save processing costs.