非对称方锥台件数控渐进成形研究
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摘要
针对非对称方锥台件的数控渐进成形工艺,采用有限元数值模拟与实验相结合的方法,分析了单道次和两道次的成形极限图和壁厚变化情况,研究了两道次成形时不同成形路径对成形质量的影响。结果表明:两道次渐进成形可提高零件的可成形性,但在成形路径设计时应考虑侧壁成形角对成形性能的影响,避免由于前后道次径向差异过大而引起的成形件壁厚过度减薄及底部下沉现象。
The numerical control incremental sheet forming technology of asymmetry square component was studied based on finite element method and experiments,which included the difference of forming limit diagrams and the change of wall thickness between single-stage and double-stage forming,and the influence on forming quality by different forming paths in double-stage forming.It was found that the formability of components can be improved by double-stage forming,but the influence of forming angle of component's wall on formability should be considered to avoid excessive thinning in the wall and sinkage in the bottom of components due to wide variance in the radial direction.
The numerical control incremental sheet forming technology of asymmetry square component was studied based on finite element method and experiments,which included the difference of forming limit diagrams and the change of wall thickness between single-stage and double-stage forming,and the influence on forming quality by different forming paths in double-stage forming.It was found that the formability of components can be improved by double-stage forming,but the influence of forming angle of component's wall on formability should be considered to avoid excessive thinning in the wall and sinkage in the bottom of components due to wide variance in the radial direction.
引文
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[9]周六如.基于数控渐进成形技术的方形盒成形工艺[J].锻压技术,2009,34(4):65-68Zhou L R.Forming process of square box based on NC incre-mental forming technology[J].Forging and Stamping Tech-nology,2009,34(4):65-68
[10]李磊,周晚林,Hussain G.金属板料单点渐进成形极限的数值模拟预测[J].机械工程学报,2010,46(18):102-107.Li L,Zhou W L,Hussain G.Prediction of single point incre-mental forming limit[J],Journal of Mechanical Engineering,2010,46(18):102-107.
[11]Duflou J R,Lauwers B,Verbert J.Study on the Achievable Ac-curacy in Single Point Incremental Forming[J].Banabinc D.Ad-vanced Methods in Materical Forming[C].Berlin,2007.
[2]Filice C,Fantini L,Micari F.Analysis of material formabilityin incremental forming[J].CIRP Annals-ManufacturingTechnology,2002,51(1):199-202.
[3]李敏,张李超,莫健华,等.面向单点渐进成形工艺的成形路径生成方法[J].农业机械学报,2011,42(3):224-228.Li M,Zhang L C,Mo J H,et al.Tool-path generation meth-od for single point incremental forming[J].Transations ofthe Chinese Society for Agricultural Machinery,2011,42(3):224-228.
[4]莫健华,韩飞.金属板材数字化渐进成形技术研究现状[J].中国机械工程,2008,19(4):494-497.Mo J H,Han F.State of the arts and latest research on incre-mental sheet NC forming technology[J].China MechanicalEngineering,2008,19(4):494-497
[5]肖士昌,高锦张,贾俐俐,等.单道次渐进成形锥形件壁厚均匀临界成形角的研究[J].锻压技术,2012,37(1):49-54.Xiao S C,Gao J Z,Jia L L,et al.Research on critical form-ing angle of uniform thickness in single path incremental form-ing for conical part[J].Forging and Stamping Technology,2012,37(1):49-54.
[6]蒋松,高锦张,贾俐俐.板料多道次渐进成形下沉现象的模拟分析[J].锻压技术,2010,35(2):50-54.Jiang S,Gao J Z,Jia L L.Simulation analysis of subsidencein multiple-stage incremental sheet forming[J].Forging andStamping Technology,2010,35(2):50-54.
[7]周杰,胡建标,张旭,等.两道次板材渐进成形过程仿真与实验验证[J],重庆大学学报,2011,34(7):46-50.Zhou J,Hu J B,Zhang X,et al.Numerical simulation andexperimental investigation of double-stage sheet incrementalforming[J]Journal of Chongqing University,2011,34(7):46-50.
[8]贾俐俐,高锦张,王书鹏.直壁筒形件多道次增量成形工艺研究[J],中国制造业信息化,2007,36(19):133-135.Jia L L,Gao J Z,Wang S P.Research on the multistage in-cremental forming of tube-like part[J].Manufacture Infor-mation Engineering of China,2007,36(19):133-135.
[9]周六如.基于数控渐进成形技术的方形盒成形工艺[J].锻压技术,2009,34(4):65-68Zhou L R.Forming process of square box based on NC incre-mental forming technology[J].Forging and Stamping Tech-nology,2009,34(4):65-68
[10]李磊,周晚林,Hussain G.金属板料单点渐进成形极限的数值模拟预测[J].机械工程学报,2010,46(18):102-107.Li L,Zhou W L,Hussain G.Prediction of single point incre-mental forming limit[J],Journal of Mechanical Engineering,2010,46(18):102-107.
[11]Duflou J R,Lauwers B,Verbert J.Study on the Achievable Ac-curacy in Single Point Incremental Forming[J].Banabinc D.Ad-vanced Methods in Materical Forming[C].Berlin,2007.