Research On Forming Regularity And Process Optimization Of Aviation Aluminum Alloy Components

With the development of high-tech and high-speed for aerospace industry,the lightweight requirement of aircraft is urgent increasingly. At present, moreand more components using high-strength, high-toughness aluminum alloy dieforgings,7075aluminum alloy as a new type of high-strength aluminum alloy,widely used in the field of aviation. Precision forging technology is under thepush of requirement that aviation industry is represented for special alloy highreliability, high security forgings, it is developing towards the direction ofenergy-saving, environmental protection, precision, high efficiency, high-qualityand low-cost.Design the preform scheme of aviation handle component and twig-typecomponent by CAD/CAE/CAM integrated three-dimensional softwarePro/Engineer in this paper, and design the mold of twig-type component. Takethe finite element simulation software Deform-3D as platform, simulation studythe precision forging process of7075aluminum alloy aviation components, andanalyze the effects of various factors on the metal forming processes of differentpreform scheme.First optimize the hot forging forming process parameters of the finiteelement model we built, under the conditions of initial forging temperature is430℃, punch downlink speed is2mm/s, friction factor is0.3, comparative analysisthe metal filling flow behavior, velocity vector field distribution, equivalentstrain characteristics, temperature and load-displacement of different perform,and predict the coarse grain defects, sufficient dissatisfaction defects, streamlinedisorder defects of forging, reveal the formation mechanism of defects in the forming process, finally get the preform shape that filling well and deformationuniform.By simulating comparison analysis, it is shown that deformation uniformityof metal is better, material utilization is higher, forming load is the minimum, andcan get the higher quality forgings when forming scheme three for aviationhandle component; forging forming integrity is the best, temperature changes isstable, and the required forming is only29.5%of the scheme one when formingscheme two for twig-type component.Finally, validate the rationality and scientificity of process scheme and molddesign for twig-type component by experiment, and get the forgings accord withaccuracy requirements and have no metallurgical defects, therefore, scheme twois the ideal preform scheme. The research of subject provides the theoreticalbasis and practical foundation for the production of similar aluminum alloyforgings and mold design, and it can be used to guide the production directly.