WELDOX960高强度钢板折弯回弹角预测分析与试验验证
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摘要
在工程机械、船舶等制造行业中,高强度钢板折弯成形的回弹控制策略直接影响板料成形精度,为更好地研究材料厚度、下模开口、上模圆角半径、折弯角度等参数对高强度钢板折弯回弹角的影响规律,以WELDOX960高强度钢板为研究对象,采用有限元分析和试验相结合进行研究。结果表明:折弯回弹角随下模开口、上模圆角半径、折弯角度的增加,呈线性增加趋势;随着材料厚度的增加,折弯回弹角大致呈直线减小的趋势,当厚度大于7 mm时,减少的趋势变缓。最后,综合考虑各影响因素,得出了WELDOX960高强度钢板的回弹角预测方程,并通过试验对比加以修正,回弹角与工程实际一致。
In construction machinery,ships and other manufacturing industries,the springback control strategy of high strength steel plate bending directly affects the precision of sheet metal forming. In order to study the influences of material thickness,lower die opening,upper die fillet radius and bending angle on the bending springback angle of high strength steel plate,for WELDOX960 high strength steel plate,the finite element analysis and experiment study were conducted. The results show that the bending springback angle increases linearly with the increasing of the lower die opening,the upper die fillet radius and the bending angle,and the bending springback angle decreases linearly with the increasing of the material thickness,furthermore the decreasing trend becomes slower when the thickness is greater than 7 mm. Finally,the prediction equation of springback angle for WELDOX960 high strength steel plate is obtained by considering all the effecting factors comprehensively,it is corrected by comparing the test results,and the springback angle is consistent with the engineering practice.
In construction machinery,ships and other manufacturing industries,the springback control strategy of high strength steel plate bending directly affects the precision of sheet metal forming. In order to study the influences of material thickness,lower die opening,upper die fillet radius and bending angle on the bending springback angle of high strength steel plate,for WELDOX960 high strength steel plate,the finite element analysis and experiment study were conducted. The results show that the bending springback angle increases linearly with the increasing of the lower die opening,the upper die fillet radius and the bending angle,and the bending springback angle decreases linearly with the increasing of the material thickness,furthermore the decreasing trend becomes slower when the thickness is greater than 7 mm. Finally,the prediction equation of springback angle for WELDOX960 high strength steel plate is obtained by considering all the effecting factors comprehensively,it is corrected by comparing the test results,and the springback angle is consistent with the engineering practice.
引文
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[6]刘伟,刘红生,邢忠文,等.高强钢板冲压成形的回弹规律与工艺参数研究[J].材料科学与工艺,2010,18(6):758-761.Liu W,Liu H S,Xing Z W,et al.Study on process parameters and springback rule for stamping of high strength steel sheet[J].Materials Science and Technology,2010,18(6):758-761.
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[8]苟春梅,吴民,董静,等.汽车冲压件工艺参数优化及回弹控制[J].锻压技术,2018,43(2):34-37.Gou C M,Wu M,Dong J,et al.Process parameter optimization and springback control of automotive stamping parts[J].Forging&Stamping Technology,2018,43(2):34-37.
[9]吴信涛,丁方强,刘国凯,等.DP800双相高强钢折弯及回弹研究[J].精密成形工程,2016,7(4):38-42.Wu X T,Ding F Q,Liu G K,et al.Bending and springback of high-strength dual phase steel DP800[J].Journal of Netshape Forming Engineering,2016,7(4):38-42.
[10]陈东辉,张建.基于CAE的QP980超高强钢零件冲压开裂及回弹控制[J].锻压技术,2018,43(5):177-183.Chen D H,Zhang J.Crack and springback control of ultra high strength steel QP980 parts based on CAE[J].Forging&Stamping Technology,2018,43(5):177-183.
[11]黄伟,李梦群,杨亚威.基于Dynaform的V形件弯曲回弹数值模拟[J].锻压技术,2014,39(6):118-121.Huang W,Li M Q,Yang Y W.Numerical analysis of springback for V-shaped pieces based on Dynaform[J].Forging&Stamping Technology,2014,39(6):118-121.
[12]代洪庆,赵妍,户春影,等.V形件自由弯曲回弹的数值模拟影响因素分析[J].黑龙江八一农垦大学学报,2010,22(3):26-29.Dai H Q,Zhao Y,Hu C Y,et al.Simulation analysis of V-bending forming and influencing factors of springback[J].Journal of Heilongjiang Bayi Agricultural University,2010,22(3):26-29.je
[2]Stelson K.An adaptive press brake control for strain hardening materials[J].Journal of Engineering for Industry,1986,108(2):127-132.
[3]付泽民.高强度金属板多道次渐进折弯成形及回弹研究[D].武汉:华中科技大学,2010.Fu Z M.Study for Multiple-step Incremental Air-bending Forming and Springback of High-strength Sheet-metal[D].Wuhan:Huazhong University of Science and Technology,2010.
[4]付泽民,莫健华,陈伟,等.基于量纲分析法的金属板材折弯回弹数学模型[J].机械工程学报,2010,46(12):53-58.Fu Z M,Mo J H,Chen W,et al.Springback model for air-bending of sheet metal based on dimensional analysis method[J].Journal of Mechanical Engineering,2010,46(12):53-58.
[5]石磊,肖华,陈军,等.先进高强度钢板弯曲类回弹特性的试验研究[J].材料科学与工艺,2009,17(5):672-679.Shi L,Xiao H,Chen J,et al.Experimental research of the bending springback property on advanced high strength steel[J].Materials Science and Technology,2009,17(5):672-679.
[6]刘伟,刘红生,邢忠文,等.高强钢板冲压成形的回弹规律与工艺参数研究[J].材料科学与工艺,2010,18(6):758-761.Liu W,Liu H S,Xing Z W,et al.Study on process parameters and springback rule for stamping of high strength steel sheet[J].Materials Science and Technology,2010,18(6):758-761.
[7]吴统超,詹梅,古创国,等.大型复杂薄壁壳体第一道次旋压成形质量分析[J].材料科学与工艺,2011,19(1):121-126.Wu T C,Zhan M,Gu C G,et al.Forming quality of the first pass spinning of large-sized complicated thin-walled shell[J].Materials Science and Technology,2011,19(1):121-126.
[8]苟春梅,吴民,董静,等.汽车冲压件工艺参数优化及回弹控制[J].锻压技术,2018,43(2):34-37.Gou C M,Wu M,Dong J,et al.Process parameter optimization and springback control of automotive stamping parts[J].Forging&Stamping Technology,2018,43(2):34-37.
[9]吴信涛,丁方强,刘国凯,等.DP800双相高强钢折弯及回弹研究[J].精密成形工程,2016,7(4):38-42.Wu X T,Ding F Q,Liu G K,et al.Bending and springback of high-strength dual phase steel DP800[J].Journal of Netshape Forming Engineering,2016,7(4):38-42.
[10]陈东辉,张建.基于CAE的QP980超高强钢零件冲压开裂及回弹控制[J].锻压技术,2018,43(5):177-183.Chen D H,Zhang J.Crack and springback control of ultra high strength steel QP980 parts based on CAE[J].Forging&Stamping Technology,2018,43(5):177-183.
[11]黄伟,李梦群,杨亚威.基于Dynaform的V形件弯曲回弹数值模拟[J].锻压技术,2014,39(6):118-121.Huang W,Li M Q,Yang Y W.Numerical analysis of springback for V-shaped pieces based on Dynaform[J].Forging&Stamping Technology,2014,39(6):118-121.
[12]代洪庆,赵妍,户春影,等.V形件自由弯曲回弹的数值模拟影响因素分析[J].黑龙江八一农垦大学学报,2010,22(3):26-29.Dai H Q,Zhao Y,Hu C Y,et al.Simulation analysis of V-bending forming and influencing factors of springback[J].Journal of Heilongjiang Bayi Agricultural University,2010,22(3):26-29.je
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