基于浮动装夹系统的薄壁深腔零件加工变形实时监测与调控方法

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中图分类号：TG547 文献标志码：A

Real-time monitoring and regulation of machining deformation in thin-walled deep-cavity components based on floating fixture system

SANG Jiabo12，ZHANGGuoliang³，ZHUANG Kejia12，HUCheng12，TANG Cheng4

（1.SchoolofechanicalandElectroicEngneering，Wuhan UnivesityofechnlogyWuhan430，China;2.Keybtor

ofAdvanced ManufacturingTechnologyfor High Performance Parts ofMinistryofEducation， Wuhan UniversityofTechnology，

Wuhan 430oo，China;3.EquipmentDepartmentof Navy，Zhuzhou420oo，China; 4.Zhongchuan Transmisionachineryo， Ltd.， Aero Engine Corporation of China， Changsha 41O2oo， China）

Abstract： To address the machining deformation of aero-engine accessory casings， a real-time monitoring and control method based on a floating fixture system was proposed. An experimental part with typical thin-walld deep-cavity features of an accessory casing was constructed，and a pneumatically actuated floating fixture system consisting of four clamping cylinders and six supporting cylinders was developed. A dynamic loading-unloading strategy was embedded in the supporting cylinders to achieve staged release and redistribution of concentrated machining stresses. Piezoelectric and laser sensors were integrated in the supporting region to obtain force and displacement histories at weak-stiffness locations before and after stress release. Using a finite element simulation model， the measured axial supporting force was converted into machining stress and deformation fields. The results show that， compared with conventional fixed support， the dynamic floating support reduce the average stress by 72.16% and decreased the deformation by 67.11% . These findings demonstrate that the proposed floating fixture system and control strategy effectively suppress residual stress accumulation and improve the geometric accuracy of thin-walled deep-cavity accessory-casing components.

Keywords： thin-walled component; floating fixture system; machining deformation; sensor

航空发动机附件机匣是发动机传动与附件安装的重要承力结构，通常采用整体高强轻质合金材料加工而成，其内部具有多空腔、筋条及局部薄壁等复杂结构特征。（剩余11195字）