冷轧连续产线中激光焊机双切剪剪切带钢断面质量对焊缝质量具有重要影响,而焊缝质量的好坏直接影响产线的稳定运行.为此,以某镀锌线激光焊机双切剪为研究对象,通过三维软件对双切剪进行建模,利用有限元软件对剪切过程进行数值模拟,并对比分析了带钢实际剪切断面情况与仿真断面情况、理论剪切力与仿真剪切力、不同剪刃间隙条件下的带钢剪切断面质量.结果表明:带钢仿真剪切断面与实际剪切断面一致;对比2、4、6 mm厚度DP980带钢数值模拟剪切力与诺莎里剪切力公式计算的剪切力,结果相差在5％之内,满足工程实际应用,验证了数值模拟的有效性;通过设定0.05、0.1、0.15 mm 3种不同的剪刃间隙对带钢剪切断面质量进行对比分析,当剪刃间隙为0.05 mm时,带钢剪切断面中剪切带占比最大为42％,毛刺高度最小为0.05 mm,剪切断面质量满足激光焊机对剪切断面的要求,因此在满足工程实际的情况下,剪刃间隙为0.05 mm时带钢剪切断面质量最好.
Finite element analysis of double shear cutting process
The section quality of the strip cut by laser welding machine has an important influence on the quality of the weld,and the quality of the weld directly affects the stable operation of the production line.Therefore,the double shear of a galvanized laser welding machine was taken as the research object,the double shear was modeled by three-dimensional software,and the shear process was simulated by finite element software.The actual shear section and the simulation section,the theoretical shear force and the simulation shear force,and the shear section quality of the strip under different cutting edge clearance conditions were compared and analyzed.The results showed that the simulated shear section of the strip was consistent with the actual shear sec-tion.By comparing the numerical simulation shear force of DP980 dual phase steel with the thickness of 2,4,6 mm with that calculated by Nosari shear force formula,the difference between the results was less than 5％,which met the practical applica-tion of engineering,and verified the validity of the numerical simulation.The quality of strip shear section was compared and an-alyzed by setting three different blade clearance of 0.05,0.1 and 0.15 mm.When the blade clearance was 0.05 mm,the maxi-mum proportion of shear strip in strip shear section was 42％,and the minimum burr height was 0.05 mm.The quality of shear section met the requirements of laser welding machine for shear section.Therefore,in the case of meeting the actual engineering,the strip shear section quality is the best when the blade clearance is 0.05 mm.
double shearthree-dimensional modelingfinite element analysisshear forceblade clearanceshear section quality
万方数据
维普
