薄壁环形件装夹变形有限元分析与夹具设计

Finite Element Analysis and Fixture Design of Clamping Deformation of Thin-walled Annular Part

薄壁件装夹变形是影响工件加工质量的重要因素,以6061铝合金材料所加工的薄壁环形件为分析对象,针对其镗孔、螺纹加工、钻孔和锪孔等多工序装夹问题,在保持相同装夹总力基础上,分别采用三爪式、六爪式和九爪式三种装夹布局,运用三维有限元方法分析不同装夹布局位置的应力应变情况,得出装夹变形控制规律。结果表明:采用九点式均匀装夹布局,设计一种弹性薄膜盘九爪式夹具,完成薄壁环形件镗孔、螺纹加工、钻孔和锪孔等多道加工工序,可有效降低装夹变形量,从而保证工件加工精度。

The clamping deformation of thin-walled parts is an important factor affecting the processing quality of workpieces.Taking a thin-walled ring part processed by 6061 aluminum alloy as the analysis object,aiming at its multi process clamping problems such as boring,thread processing,drilling and spot facer,on the basis of maintaining the same total clamping force,three clamping layouts such as 3-jaw,6-jaw and 9-jaw are adopted respectively,the three-dimensional finite element method is used to analyze the stress and strain of different clamping layout positions,and the law of clamping deformation control is obtained.The results show that the clamping deformation can be effectively reduced by adopting the 9-point uniform clamping layout.The results show that the 9-point uniform clamping layout is adopted to design a flexible film disk 9-claw type fixture to complete multiple processes such as boring,thread processing,drilling and countersinking of thin-walled annular parts,which can effectively reduce the clamping deformation and ensure the workpiece processing accuracy.