|
摘要：
|
|
根据T形管冷弯成形的轧辊配辊方案和成形机组参数，在ABAQUS中建立了符合实际工况的管坯和轧辊模型，并采用显式算法对成形过程进行了全流程仿真。通过对仿真结果中局部成形面的分析和侧面“倾斜”区域的中点在X方向位移数值的对比，发现管坯在进入第6道次后,轧辊成形表面未与管坯圆弧面压实，在后续变形过程中没有得到修正。在此基础上对轧辊的孔形进行优化，同时将尖角改为圆角。对优化后的配辊方案进行了模拟仿真和生产验证。结果表明：有限元仿真可以预测T形管在成形过程中的缺陷，并能对轧辊孔形设计提供有益的参考。
|
|
According to the roll-arranging scheme and the forming unit parameters of T-tube cold forming, the model of tube blank and roll during actual conditions were set up by software ABAQUS, and the whole rolling process was simulated by explicit algorithm. Through the analysis of local forming surface and contrast of the numerical displacement of middle point in the side of the inclination region along X direction in simulation results, it is found that the forming surface of the tube blank after entering the sixth pass is not compacted with the circular arc surface of tube blank, and this situation is not corrected during the subsequent deformation process. Based on the above situation, the shape of roll hole was optimized with changing the sharp corner into rounded corner, and the optimized roll-arranging scheme was simulated and verified. The results show that the finite element simulation can predict defects in the rolling process of T-tube and provide beneficial reference for designing the shape of roll hole.
|
|
基金项目：
|
|
江苏省高校品牌专业建设支撑项目（PPZY2015 C234）；模具设计与制造品牌专业建设（ZDPPZY08）
|
|
作者简介：
|
|
孙庆东（1979-），男，硕士，讲师
E-mail：23478954@qq.com
|
|
参考文献：
|
［1］张宝,丁武学,彭斌彬.下山法成形在辊弯成形中的应用
［J］.锻压技术,2014,39(1):52-57.
Zhang B，Ding W X，Peng B B. Application of downhill method in roll forming
［J］. Forging & Stamping Technology,2014，39(1):52-57.
［2］王金飞,韩宝云,李殿杰.焊管成形过程有限元法研究的进展
［J］.钢管,2008,37(4):65-68.
Wang J F，Han B Y，Li D J. Progress of research on weld-pipe formation process with FE method
［J］. Steel Pipe，2008,37(4):65-68.
［3］杜凤山,付志强,于辉.矩形管冷弯成形的辊花设计及成形规律
［J］.中国机械工程,2016,21(11):2841-2845.
Du F S，Fu Z Q，Yu H .Roll flower design and forming mechanism of rectangular tubes in cold roll forming processes
［J］. China Mechanical Engineering，2016，21(11):2841-2845.
［4］Farzin M，Tehrani M S，Shameli E. Determination of buckling limit of strain in cold roll forming by the finite element analysis
［J］.Journal of Materials Processing Technology,2002,125:626-632.
［5］韩飞,朱德鹏.辊弯成形中成形力的理论分析和有限元仿真
［J］.锻压技术,2016,41(12):150-154.
Han F，Zhu D P. Theoretical analysis and numerical simulation on forming force in rolling
［J］. Forging & Stamping Technology，2016，41(12):150-154.
［6］肖良红,黎宇,曹亚雄，等.薄壁槽钢零件辊弯成形边波产生机理及影响因素
［J］.塑性工程学报,2016,23(2):32-39.
Xiao L H，Li Y，Cao Y X，et al. Mechanisms and influences of edge-wave in roll-forming for thin-walled channel steel parts
［J］.Journal of Plasticity Engineering,2016,23(2):32-39.
［7］孙庆东,王传红,任友亮,等.基于COPRA的T形管成形工艺优化与轧辊模设计
［J］.模具工业，2016,42(9):59-63.
Sun Q D，Wang C H，Ren Y L，et al. T-tube forming process optimization and the rolling die design based on COPRA
［J］.Die & Mould Industry，2016,42(9):59-63.
［8］曾国.多道次辊弯成形冷弯型钢残余应力有限元仿真与实验研究
［D］.上海:上海交通大学,2009.
Zeng G. Simulation and Experimental Study on Residual Stresses for Multi-stand Roll-formed Sections
［D］.Shanghai：Shanghai Jiao Tong University,2009.
［9］孙庆东,王传红,徐小青.O形管辊弯成型有限元仿真与孔形优化设计
［J］.现代制造工程，2016,(12):112-116.
Sun Q D,Wang C H,Xu X Q. O form tube forming finite element simulation and roll shape optimization design
［J］. Modern Manufacturing Engineering,2016,(12):112-116.
［10］王婷,韩飞.基于有限元模拟的变截面辊弯成形起皱缺陷预测
［J］.锻压技术,2013,38(12):67-72.
Wang T,Han F. Prediction of wrinkling in flexible roll forming based on finite element simulation
［J］. Forging & Stamping Technology,2013,38(12):67-72.
［11］张建伟.ABAQUS6.12有限元分析从入门到精通
［M］.北京:机械工业出版社,2015.
Zhang J W. ABAQUS6.12 Finite Element Analysis from the Entry to the Master
［M］. Beijing: China Machine Press，2015.
［12］李楠,闫志杰,胡勇,等.Q235立柱冷弯成形过程的有限元
［J］.塑性工程学报,2014,21(3):46-51.
Li N，Yan Z J，Hu Y，et al. Finite element study on cold bending process of Q235 pillar plate
［J］.Journal of Plasticity Engineering,2014,21(3):46-51.
［13］武正权,牛志刚,朱贵昕.矿用W钢带多道次辊弯成型数值仿真
［J］.机械设计与制造,2014,(8):85-88.
Wu Z Q，Niu Z G，Zhu G X. Numerical simulation of multi-pass roll forming of mine W-section steel strap
［J］.Machinery Design & Manufacture,2014，(8):85-88.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
