Optimization Of Aviation Thin-walled Parts Tooling And It's Adaptive Research

Aviation thin wall parts material is always titanium alloy,It is widely used in aerospace field because of the light weight and the strength of the high strength.However,Due to the poor cutting performance of titanium alloy and the larger diameter,thinner wall thickness of parts,the poor rigidity of parts of is extremely easy to produce deformation,which increasing the difficulty of the parts processing.This paper regard the front casing as a research object,study the optimization and adaptive aspects of tooling parameters by using the finite element analysis method.Meanwhile,combining with the test conditions of the enterprise provide,this paper take the first inner casing as a research object,and do the Milling experiment to To verify the accuracy of the finite element simulation.This paper achieve the following research findings:Firstly,The design of thin-walled workpiece.The 3D model of the thin-walled parts of the titanium alloy TC4 is built according to the principle of positioning and clamping,and then complete tooling layout scheme,at the same time,determine the clamping and cutting force.Secondly,optimization design of tooling parameters.The paper uses orthogonal analysis method to carry out the finite element simulation in thin-walled cutting,and the cutting deformation under different work parameters is analyzed,and then the deformation trend of the cutting point over work parameters is studied.Thereby we can optimize the work parameters in thin-walled part.After optimization,the error caused by work parameters can be reduced more than 50%,which directly provides a guidance to the thin-walled part process.Thirdly,the milling displacement test.The test system of the milling displacement for aviation thin-walled parts is constructed,the deformation of thin-walled parts in milling is measured,and then this paper compared the experimental results with the finite element simulation results to verify each other.Last but not least,the study of adaptive airbag.the adaptive pressure airbag is proposed to improve the precision of aerospace thin-walled part.Using different pressure airbag according to the deformation of cutting point,the clamping deformation can be reduced more than 40%on the basis of optimization,which will reduce the part deflection and control the machining precision of the thin-walled part.