薄壁结构件铣削加工变形的有限元分析
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摘要
鉴于薄壁结构件铣削过程中加工变形对面形精度存在不利影响,文章基于有限元分析(FEA)方法研究薄壁件铣削面形误差分布对装夹方案和走刀路径等因素的依赖关系,并分析工件未铣削区域材料残留对铣削变形误差的影响规律。研究结果表明:薄壁结构件的加工变形误差不仅取决于装夹方案和走刀路径,而且还严重依赖于未铣削区域的材料残留,通过合理选取装夹方案和走刀路径可以有效提高薄壁结构件铣削加工的面形精度。
In view of the adverse effects of machining deformations on the forming accuracy in the milling processes of thin-walled parts,this paper will discuss the dependences of clamping schemes and milling toolpaths on the forming error distributions of milled thin-walled parts based on finite element analysis( FEA),and investigate the influence laws of material residues in the unprocessed areas on the milling deformation errors. The obtained results indicate that the milling deformation errors not only depend on the clamping schemes and milling toolpaths,but also rely on the material residues in unprocessed areas,the reasonable selections of clamping schemes and milling toolpaths can effectively improve the milling surface errors of thin-walled parts.
In view of the adverse effects of machining deformations on the forming accuracy in the milling processes of thin-walled parts,this paper will discuss the dependences of clamping schemes and milling toolpaths on the forming error distributions of milled thin-walled parts based on finite element analysis( FEA),and investigate the influence laws of material residues in the unprocessed areas on the milling deformation errors. The obtained results indicate that the milling deformation errors not only depend on the clamping schemes and milling toolpaths,but also rely on the material residues in unprocessed areas,the reasonable selections of clamping schemes and milling toolpaths can effectively improve the milling surface errors of thin-walled parts.
引文
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[2]沈耿.薄板件切削加工控制变形的工艺措施[J].现代制造工程,2003(4):50-52.
[3]邵为宪.薄板件平面铣削变形的装夹补偿方法研究[D].济南:山东大学,2015.
[4]刘玉梅.薄板件切削回弹变形机理及装夹优化方法研究[D].济南:山东大学,2012.
[5]王少红.航空薄壁零件的铣削加工变形控制研究[D].大连:大连交通大学,2008.
[6]宋寒. 7055机翼壁板加工变形研究[D].南京:南京航空航天大学,2015.
[7]王志刚,何宁,张兵,等.航空薄壁零件加工变形的有限元分析[J].航空精密制造技术,2000,36(6):7-11.
[8]Izamshah R A R,Mo J,Ding S L. Finite Element Analysisof Machining Thin-Wall Parts[J]. Key Engineering Materi-als,DOI:10. 4028/www. scientific. net/KEM. 458. 283.
[9]Wan X J,Hua L,Wang X F,et al. An error control ap-proach to tool path adjustment conforming to the deformationof thin-walled workpiece[J]. International Journal of Ma-chine Tools&Manufacture,2011,51(3):221-229.
[10]唐亚彬.基于有限元分析的薄壁结构件加工变形预测方法研究[D].哈尔滨:哈尔滨工业大学,2012.
[11]杜斌.基于有限元的薄壁件切削加工变形影响的研究[D].武汉:武汉理工大学,2015.