摘要
研究了进料口高度h、U型型腔倾斜角α、倾斜角β、倾斜角θ和马蹄形型腔底角γ对模具出口处的流速均方差产生的影响。采用HyperXtrude模拟软件对不同型腔参数的U型模具进行连续挤压数值模拟,得到挤压过程中U型铜带的速度分布规律。结果表明,金属在型腔中的流速是不均匀的,速度最大值出现在U型带两端的中部,最小值出现在U型圆弧部位。设计正交试验,得出各因素对流速均方差影响的先后顺序为:β>α>θ>h>γ,U型铜带模具结构的最佳优化方案为h=85 mm,α=24°,β=14°,θ=8°,γ=77°。对U型铜带进行连续挤压工艺试验,获得了合格产品,确定了优化后的型腔结构使挤压出的产品流速分布更加均匀。
The influence of the height of feed port h,inclination angle of U-shaped cavity α,inclination angle β,inclination angle θ and horseshoe-shaped cavity bottom angle γ on the mean square deviation of the flow velocity at the exit of the mold was studied.HyperXtrude simulation software was used to carry out the numerical simulation of continuous extrusion of U-shaped molds with different cavity parameters,and the velocity distribution law of U-shaped copper strip during the extrusion process was obtained.The results show that the flow velocity of metal in the cavity is not uniform,the maximum value of velocity appears in the middle of both sides of the U-shaped strip,and the minimum value appears in the U-shaped arc.The orthogonal test was designed,and the sequence of the influence of various factors on the mean square devietion of the flow velocity was obtained as follows:β>α>θ>h>γ.The optimal optimization scheme for the U-shaped copper strip mold structure is that the h = 85 mm,α = 24°,β = 14°,θ = 8°,and γ = 77°.The continuous extrusion process test was carried out for U-shaped copper strip,and qualified products were obtained.The optimized cavity structure is determined to make the flow velocity distribution of the extruded products more uniform.
作者
马旭东
赵颖
刘元文
运新兵
裴久杨
易飞
MA Xu-dong;ZHAO Ying;LIU Yuan-wen;YUN Xin-bing;PEI Jiu-yang;YI Fei(Engineering Research Center of Continuous Extrusion,Ministry of Education,Dalian Jiaotong University,Dalian 116028,China;Dalian Konform Technical Co.,Ltd.,Dalian 116028,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第1期110-118,共9页
Journal of Plasticity Engineering
基金
辽宁省教育厅项目(JDL2019001)
大连市科技创新基金资助项目(2018J11CY027)。
关键词
连续挤压
U型铜带
数值模拟
正交试验
模具优化
continuous extrusion
U-shaped copper strip
numerical simulation
orthogonal test
mold optimization
