摘要
以某市政管廊固定螺母冷镦成形为例,基于Archard磨损理论,采用有限元分析软件Deform-3D对螺母冷镦过程中工位4下冲头进行优选。然后通过正交试验得到冲压速度、模具表面硬度、模芯圆角半径、摩擦系数对下冲头磨损的影响规律,得到最优工艺参数组合为：冲压速度5 mm·s^-1、模具表面硬度58 HRC、模芯圆角半径3 mm、摩擦系数0.13。采用优化后参数进行模拟分析,下冲头最大磨损量为2.93×10^-5mm,较优化前大幅降低,基于模拟结果预测出下冲头使用寿命。最后采用最优参数组合进行试模,工件质量良好,未出现材料折叠、拉毛等缺陷,符合生产要求,为制件实际生产提供了理论依据。
Taking the cold heading formed fixing nut of a municipal pipe gallery as an example,the lower punch of station four during cold heading process of nut was optimized by finite element software Deform-3 D based on Archard wear theory. Then,the influences of stamping speed,hardness of mold surface,fillet radius of mould core and friction coefficient on the wear of lower punch were obtained by orthogonal test. The obtained optimum parameters were the punching speed of 5 mm · s^-1,the hardness of mould surface surface of 58 HRC,the fillet radius of mould core of 3 mm and the friction coefficient of 0. 13. Through the simulation analysis with optimal parameters,the maximum wear of lower punch was 2. 93 × 10^-5 mm,which was reduced significantly compared with that before optimization,and then the service life of lower punch was predicted based on simulation results. Moreover,a mould test was carried out with the optimal parameters. And the workpiece has a good quality without material defects such as folding and nap,which meets the production requirements and provides a theoretical basis for actual production.
作者
石君
Shi Jun(Department of Applied Technology, Shanghai Zhongqiao College, Shanghai 201514, Chin)
出处
《锻压技术》
CAS
CSCD
北大核心
2018年第3期31-35,51,共6页
Forging & Stamping Technology
基金
企业横向项目(J2015-272)
关键词
冷镦成形
磨损
正交试验
有限元模拟
螺母
cold heading forming
wear
orthogonal test
finite element simulation
nut
