Research On Processing Technology Of Aero-engine Thrust-vectoring Nozzle Guide-ball

With rapid development of modern aero-engine technology,the thrust vector has become the key technology of the future advanced fighter.The thrust-vectoring nozzle is the critical components to achieve thrust-vector control.The guide-ball is used as a connecting hub in the vector nozzle and is installed between the actuator and the vector adjustment ring,It can convert the drive of the actuator into the position wave of the vector adjusting ring,so as to realize the vector control of the nozzle adjuster.So the processing quality of the guide-ball seat is very important to the thrust vector of aero-engineThe guide-ball is a typical structural part which has blind oblique holes,inner spherical faces,U-grooves,weight-lightened grooves and other structures.The diameter tolerance of the inner spherical face is 0.052 mm.At the initial stage of development,the qualified rate of parts is only about 50%.With the more and more stringent requirement of the products and the requirement of “the best product project”,it is essential to deliver qualified guide-ball.So it is chosen as the research object to improve its processing technology and the product qualification rate.In this paper,the machining process of the inner spherical and the grooved groove is considered by measuring the accuracy of the inner spherical forming tool,the analysis of the grooving force,the process capability and so on.The process programming model of the part is designed to solve the problem of X and Z The problem is difficult to determine the relationship between the inner spherical and groove to achieve the boring and milling complex processing to improve the inner spherical and groove processing capacity,so that parts assembly when the spherical and slot repair rate from 40% to 0;In this paper,three kinds of machining schemes,such as drilling,EDM drilling and milling and milling,were studied.Finally,the milling process and the process of milling and drilling were determined.Programming method,so that the depth of the hole hole qualified rate of 100%;through the Israeli OMATIVE adaptive control system research,the use of adaptive control system for milling,parts processing efficiency increased by about 20%;the use of finishing to improve the parts Surface quality,improve the surface integrity of parts;combined with the existing processing conditions and processing equipment,and analysis of the process to improve and improve the tooling structure,improve the tooling positioning accuracy and correct theefficiency of 70%;with the use of Minitab,the measurement tool can be analysised,the reasonable measurement tool is selected and the accuracy of measurement is ensured.Finally,after technical research and improvement,the qualified rate of the guide-ball seat is improved from 50% to 94% and more,which satisfies the need of production.