偏心螺母的多工位冷镦成形工艺数值模拟及优化
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摘要
对偏心螺母进行工艺分析,提出了两种不同的工艺方案,并基于Deform-3D对两种冷镦工艺方案进行数值模拟。对比分析了两种方案成形过程中应力应变分布以及载荷行程曲线的变化规律。通过优化工艺及模具结构使得多工位冷镦过程中各工位模具承受的载荷值较小并且分布均匀。经仿真分析以及实验验证证明,通过第2种工艺方案生产出来的偏心螺母表面质量较好,填充饱满,无裂纹、折叠等缺陷,采用该工艺方法更适用于零件的大批量生产。
The process analysis of eccentric nut was described,and two different processes were proposed and simulated based on Deform-3D. Then,the stress and strain distribution,and load-stroke curves of two processes were contrasted and analyzed. Therefore,the load acting on die decreased and its distribution became uniform in every station by optimizing the process and die structure during the multistation cold heading process. According to simulation analysis and experimental verification,eccentric nuts produced by the second process have a high quality without cracks or other defects,which is more suitable for the mass production of parts.
The process analysis of eccentric nut was described,and two different processes were proposed and simulated based on Deform-3D. Then,the stress and strain distribution,and load-stroke curves of two processes were contrasted and analyzed. Therefore,the load acting on die decreased and its distribution became uniform in every station by optimizing the process and die structure during the multistation cold heading process. According to simulation analysis and experimental verification,eccentric nuts produced by the second process have a high quality without cracks or other defects,which is more suitable for the mass production of parts.
引文
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[2]冯琴.我国汽车紧固件产业现状和展望[J].现代零部件,2013,(2):61-63.Feng Q.Present situation and prospect of automobile fastener industry in China[J].Modern Components,2013,(2):61-63.
[3]肖志玲,刘百宣,刘华,等.销钉多工位冷镦成形过程数值模拟及组织演变[J].热加工工艺,2014,43(17):119-124.Xiao Z L,Liu B X,Liu H,et al.Numerical simulation and microstructure evolution on multi-station cold heading of pin[J].Hot Working Technology,2014,43(17):119-124.
[4]肖志玲,刘百宣,刘华,等.螺旋道钉多工位冷镦成形工艺优化及数值模拟[J].锻压技术,2014,39(2):80-83.Xiao Z L,Liu B X,Liu H,et al.Process optimization and numerical simulation of multi-stage cold heading for railway screw spike[J].Forging&Stamping Technology,2014,39(2):80-83.
[5]李会肖,龚红英,王斯凡,等.SCM435花键轴冷挤压过程工艺分析[J].热加工工艺,2014,43(19):131-133.Li H X,Gong H Y,Wang S F,et al.Analysis of cold extrusion process on SCM435 spline shaft[J].Hot Working Technology,2014,43(19):131-133.
[6]胡建军,李小平.Deform-3D塑性成形CAE应用教程[M].北京:北京大学出版社,2011.Hu J J,Li X P.Deform-3D Plastic Forming CAE Application Tutorial[M].Beijing:Peking University Press,2011.
[7]王修保.双耳托板自锁螺母冷镦工艺及模具设计[J].模具制造,2008,(3):58-61.Wang X B.Technology analysis and design of cold-forging die for the anchor locking-nuts with twolug[J].Mold Manufacturing,2008,(3):58-61.
[8]Schmidt R A,Birzer F,Hofel P,et al.Cold Forming and Fine Blanking[M].赵震,向华,庄新村,译.北京:机械工业出版社,2008.Schmidt R A,Birzer F,Hofel P,et al.Cold Forming and Fine Blanking[M].Translated by Zhao Z,Xiang H,Zhuang X C.Beijing:China Machine Press,2008.
[9]胡建华,付炳欣,秦建军.小模数齿形精冲的数值模拟及参数优化[J].塑性工程学报,2010,17(1):52-56.Hu J H,Fu B X,Qin J J.Numerical simulation and optimization of processing parameters for fine-blanking of fine-pitch gear[J].Journal of Plasticity Engineering,2010,17(1):52-56.
[10]苗景涛,李名尧,梁孟强,等.基于Deform-3D的喷油器护套冷挤压工艺优化[J].上海工程技术大学学报,2015,29(3):250-252.Miao J T,Li M Y,Liang M Q,et al.Process optimization of fuel injector sheath cold extrusion based on Deform-3D[J].Journal of Shanghai University of Engineering Science,2015,29(3):250-252.