大导程螺母的内螺纹冷挤压加工工艺研究
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摘要
针对大导程螺母难磨削的技术缺陷,提出了一种内螺纹冷挤压的成形加工方法,设计了一种专用的挤压丝锥结构,分析了影响冷挤压加工质量的几个因素。以M10-1. 5内螺纹挤压成形过程为例,利用有限元仿真软件DEFORM,分析了冷挤压过程中的应力、应变及其扭矩等的变化规律,对比理论计算与仿真分析结果,验证了模拟仿真方法确定挤压过程中最大扭矩的正确性。
Aiming at the technical defect of hard grinding of large lead nut,a cold extrusion forming method for inner thread was put forward,a special extrusion tap structure was designed,and several factors affecting the quality of cold extrusion processing were analyzed. Taking the extrusion process of M10-1. 5 internal thread as an example,the variation of stress,strain and torque during cold extrusion was analyzed by using finite element simulation software DEFORM. The results of theoretical calculation and simulation analysis were compared to verify the correctness of simulation method in determining the maximum torque during extrusion.
Aiming at the technical defect of hard grinding of large lead nut,a cold extrusion forming method for inner thread was put forward,a special extrusion tap structure was designed,and several factors affecting the quality of cold extrusion processing were analyzed. Taking the extrusion process of M10-1. 5 internal thread as an example,the variation of stress,strain and torque during cold extrusion was analyzed by using finite element simulation software DEFORM. The results of theoretical calculation and simulation analysis were compared to verify the correctness of simulation method in determining the maximum torque during extrusion.
引文
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[18]范淑琴,朱倩,王琪,等.内螺纹挤压关键技术[J].精密成形工程,2018,10(2):86-89.
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[2]涂兴凯,王华权,熊慧珺.大导程滚珠螺母内滚道的成型方法研究[J].机床与液压,2011,39(6):16-18.
[3]缪宏,左敦稳,张瑞宏. Q460高强度钢内螺纹冷挤压试验研究[J].机械工程学报,2011,47(13):160-166.
[4]刘将先,李远忠.挤压丝锥螺纹的磨削加工[J].工具技术,2003,37(4):25-27.
[5]何亚银,杨明亮.内螺纹加工方法的研究现状分析[J].陕西理工学院学报(自然科学版),2012,28(4):14-18.
[6]张鹏升,杜宇波,李亚东,等.内螺纹冷挤压成形过程中金属流动行为研究[J].铸造技术,2016(6):1216-1217.
[7]马冬.挂钩轴内螺纹冷挤压成形方法研究[D].重庆:重庆大学,2004.
[8]徐九华,王珉.高强度钢内螺纹冷挤压成形与强化试验研究[J].南京航空航天大学学报,1996,28(6):838-843.
[9]曾洁,左敦稳,薛善良.内螺纹冷挤压加工工艺设计系统研究[J].机械设计与制造工程,2012,41(7):25-29.
[10] FROMENTIN G,POULACHON G,MOISAN A,et al. Precision and surface integrity of threads obtained by formtapping[J]. CIRP Annals-Manufacturing Technology,2005,54(1):519-522.
[11] CARVALHO A O D,BRANDO L C,PANZERA T H,et al. Analysis of form threads using fluteless taps in cast magne-sium alloy(AM60)[J]. Journal of Materials Processing Tech,2012,212(8):1753-1760.
[12]毛素娥.内螺纹的冷挤压成形[J].模具技术,1984(6):34-40.
[13]缪宏.基于冷挤压的高强度钢内螺纹抗疲劳加工工艺研究[D].南京:南京航空航天大学,2011.
[14]于振汉.谈无屑挤压攻丝内螺纹新工艺[J].机械设计与制造,1995(2):47.
[15]沈子镛,沈锦民,崔纯刚.挤压丝锥应用中几个问题的探讨[J].组合机床,1983(8):39-44.
[16]赵宏敏.挤压螺母丝锥及其应用[J].机械工人:冷加工,2007(1):34-36.
[17]王瑞兰.有槽挤压丝锥的设计[J].工具技术,1996(2):18-20.
[18]范淑琴,朱倩,王琪,等.内螺纹挤压关键技术[J].精密成形工程,2018,10(2):86-89.
[19]丁艳宝.厚板类锻件拔长的成形规律及应用研究[D].长沙:中南大学,2011.
[20]石现景.镀锌板圆盘剪分切加工过程有限元仿真与实验研究[D].广州:广东工业大学,2014.
[21]胡建军. DEFORM-3D塑性成形CAE应用教程[M].北京:北京大学出版社,2011.