Research On The Main Cutting Technology Of The Main Lifting Support Of A Certain Aircraft

For a certain aircraft main support joint parts processing,the deep groove processing technology system is not rigid,the stress distribution of the forging raw material is not uniform,the workpiece is easily deformed in the NC machining process,and it is difficult to predict the tool life.Supporting joints are research objects,combined with part features,forging stress testing analysis,deep groove machining cutting force analysis,deep groove machining flutter analysis,common tool life studies,and proposed aircraft main support joint parts processing technology Optimization.The main research content in this thesis is as follows:Using the method of finite element analysis of blank stress,X-ray method,and borehole method,the finite element simulation is first performed per the state of heat treatment of the blank to obtain the shape of the internal stress distribution of the blank,and the state of its surface stress is extracted.Then,the surface stress was measured by X-ray method and drilling method to obtain the actual surface stress distribution of the blank.This results were compared with the simulation results,and the simulation results were corrected.Finally,the finite element method was for analyzing the deformation of the typical test parts and parts,and the deformation rules of the parts and the local test parts were mastered.The overall strategy of the part machining deformation control and the deformation control technology of the local features were proposed.Considering main tool types,materials and parts of materials used in main support joint milling process,establish a dynamic milling force model,and verify the correctness of the model through the test.Under different cutting parameters,contour deviation was used to describe the final machining quality,and the variation of contour error with cutting parameters was obtained.Using finite element simulation,the trend of the first two natural frequencies of thin-walled parts changing with the milling process under different machining methods is obtained.The evolution law of the dynamic characteristics of thin-walled parts in the machining process is analyzed and the milling stability is studied.Different machining positions are different.Process stability study.Through the monitoring of cutting force and heat during tool cutting process,using FEA simulate tool cutting process,and micro analysis of chip state and tool wear condition,comprehensively study the rationality of tool material and geometric parameters,and the certain cutting conditions.Tool wear curve,combined with a large number of cutting tests to correct for tool life.