轧辊压下量对铜板带连挤连轧的影响
|
摘要
通过采用DEFORM软件模拟铜板带连挤连轧存在微张力时的成形过程,分析了在不同的轧辊压下量下,板带的温度场、等效应力、挤压轮和轧辊扭矩、腔体在Z轴方向上承受的平均载荷和轧制力分布情况。结果表明,增加轧辊压下量,坯料在挡料块、腔体扩展区、模具出口和轧制变形区的温度下降,坯料在模具出口区的等效应力下降,而在轧制变形区坯料的等效应力值增大,轧辊的平均扭矩和轧制力也增大;当轧辊压下量为4mm和6mm时,挤压轮的最大扭矩和腔体在Z轴方向上承受的平均载荷小于轧辊压下量为2mm和8mm时。连续挤压挤出板带尺寸为120mm×10mm,轧辊的压下量为4mm~6mm时,更适合铜板带的连挤连轧。通过试验验证了数值模拟结果的可靠性。
The forming process of continuous extrusion and rolling of copper strips is simulated by DEFORM software with the existence of micro-tension.The temperature of strips,the equivalent stress,the torques of extrusion wheel and roll,the stress of chamber in Z-direction and the rolling force are analyzed with the different rolling reductions.The results indicate that:As the rolling reduction increasing,the temperatures of strip on the abutment,in the chamber,the mould and the roll are dropping,the equivalent stress of strips at the exit of mould is dropping as the same time,but the equivalent stress of strips is increasing,the torque and force of roll are increasing as well.As the rolling reductions are 4mm,6mm,the values of maximum torque of extrusion wheels and the stress of chamber in Z-direction are greater than the values of rolling reduction of 2mm and 8mm.Through the analysis,when the size of copper strips are 120mm×10mm by continuous extrusion,the rolling reductions of 4mm~6mm are more suitable for continuous extrusion and rolling of copper strips.The reliability of the numerical simulation results are validated by the experiment.
The forming process of continuous extrusion and rolling of copper strips is simulated by DEFORM software with the existence of micro-tension.The temperature of strips,the equivalent stress,the torques of extrusion wheel and roll,the stress of chamber in Z-direction and the rolling force are analyzed with the different rolling reductions.The results indicate that:As the rolling reduction increasing,the temperatures of strip on the abutment,in the chamber,the mould and the roll are dropping,the equivalent stress of strips at the exit of mould is dropping as the same time,but the equivalent stress of strips is increasing,the torque and force of roll are increasing as well.As the rolling reductions are 4mm,6mm,the values of maximum torque of extrusion wheels and the stress of chamber in Z-direction are greater than the values of rolling reduction of 2mm and 8mm.Through the analysis,when the size of copper strips are 120mm×10mm by continuous extrusion,the rolling reductions of 4mm~6mm are more suitable for continuous extrusion and rolling of copper strips.The reliability of the numerical simulation results are validated by the experiment.
引文
[1]储灿东,翟福宝,彭颖红等.连续挤压成形过程中挤压轮速度的影响[J].机械科学与技术,2001.20(4):557-570
[2]游伟.铜板带连挤连轧工艺理论研究[D].大连:大连交通大学,2013
[3]张红云,张金标,谢博.铜扁线连续挤压缺陷分析及工模具的优化[J].金属铸锻焊技术,2010.39(23):213-215
[4]张进之.论常用连轧张力微分方程的适用范围[J].钢铁研究学报,2002.14(5):73-75
[5]郑申白,韩静涛,王江.连轧张力的运动力学稳态方程[J].钢铁研究学报,2005.17(6):39-42
[6]石萍,张英,任艳荣.用边界单元法分析张力在轧制中的作用[J].北京建筑工程学院学报,2005.21(3):71-73
[7]高亚男,张艳菊,郝瑞朝等.推/张力轧制不锈钢/碳钢复合钢筋的有限元模拟与实验研究[J].特殊钢,2013.34(4):5-9
[8]YUN Xin-bing,YOU Wei,ZHAO Ying,et al.Continuous extrusion and rolling forming velocity of copper strip[J].Transactions of Nonferrous Metals Society of China,2013.23(4):1108-1113
[9]张新明.铝热连轧原理与技术[M].湖南:中南大学出版社,2010:37-39
[10]运新兵,祁伟.无氧铜带坯连挤连轧生产线控制系统[P].中国,201320102889.5.2013-08-28
[11]张鹏程.板带热连轧过程模拟[D].唐山:河北理工学院,2004
[12]于天娇,宋宝韫,裴久杨.挤压轮转速对异型铜管连续挤压影响的数值模拟研究[J].锻压技术,2013.(4):58-63
[13]曹雪,刘元文,裴久杨.模具入口角度对铜排连续挤压扩展成形的影响[J].锻压技术,2013.(5):91-95
[14]谢玲玲,宋宝韫.铜母线连续挤压扩展成形过程的三维有限元数值模拟[J].锻压技术,2005.(3):72-75
[15]运新兵,刘桂林,宋宝韫等.压实轮压下量对宽铜带连续挤压过程的影响[J].锻压技术,2008.(5):71-75
[2]游伟.铜板带连挤连轧工艺理论研究[D].大连:大连交通大学,2013
[3]张红云,张金标,谢博.铜扁线连续挤压缺陷分析及工模具的优化[J].金属铸锻焊技术,2010.39(23):213-215
[4]张进之.论常用连轧张力微分方程的适用范围[J].钢铁研究学报,2002.14(5):73-75
[5]郑申白,韩静涛,王江.连轧张力的运动力学稳态方程[J].钢铁研究学报,2005.17(6):39-42
[6]石萍,张英,任艳荣.用边界单元法分析张力在轧制中的作用[J].北京建筑工程学院学报,2005.21(3):71-73
[7]高亚男,张艳菊,郝瑞朝等.推/张力轧制不锈钢/碳钢复合钢筋的有限元模拟与实验研究[J].特殊钢,2013.34(4):5-9
[8]YUN Xin-bing,YOU Wei,ZHAO Ying,et al.Continuous extrusion and rolling forming velocity of copper strip[J].Transactions of Nonferrous Metals Society of China,2013.23(4):1108-1113
[9]张新明.铝热连轧原理与技术[M].湖南:中南大学出版社,2010:37-39
[10]运新兵,祁伟.无氧铜带坯连挤连轧生产线控制系统[P].中国,201320102889.5.2013-08-28
[11]张鹏程.板带热连轧过程模拟[D].唐山:河北理工学院,2004
[12]于天娇,宋宝韫,裴久杨.挤压轮转速对异型铜管连续挤压影响的数值模拟研究[J].锻压技术,2013.(4):58-63
[13]曹雪,刘元文,裴久杨.模具入口角度对铜排连续挤压扩展成形的影响[J].锻压技术,2013.(5):91-95
[14]谢玲玲,宋宝韫.铜母线连续挤压扩展成形过程的三维有限元数值模拟[J].锻压技术,2005.(3):72-75
[15]运新兵,刘桂林,宋宝韫等.压实轮压下量对宽铜带连续挤压过程的影响[J].锻压技术,2008.(5):71-75