摘要
基于DEFORM-3D数值模拟软件,以某深孔汽缸为研究对象,建立了大长径比筒形件正挤压成形的有限元仿真模型,研究入模角α、凹模圆角r、定径带长度h、挤压速度v等工艺参数对金属塑性变形的影响;以挤压力峰值Lmax、坯料损伤峰值Dmax和凹模磨损量W为优化目标,进行正交试验方案设计,分析各工艺参数对优化目标的影响规律,获得较合理的工艺参数组合。研究结果表明,当入模角α=90°、凹模圆角r=3 mm、定径带长度h=20 mm、挤压速度v=10 mm/s时,可有效降低挤压力峰值和凹模磨损量,保证了零件的成形质量与模具的使用寿命。
Taking a deep-hole cylinder as the research object, a finite element simulation model for the forward extrusion forming of the cylinder with large length-diameter ratio was established based on DEFORM-3D platform. The effects of process parameters such as entrance angle a, concave die fillet r, die land length h, and extrusion speed v on plastic de- formation of metal were investigated. Taking the maximum extrusion force L~, the maxi- mum blank damage value D~ and the die wear extent IF as the optimization targets, the orthogonal test was carried out and the influence law of each process parameter on the op- timization target was analyzed. A reasonable combination of process parameters was ob- tained. The research result showed that when the entrance angle a=90°, concave die fillet r= 3 ram, die land length h=20 ram, and the extrusion speed ν=lO mm/s, The maximum extru- sion force and the wear extent of die could be effectively reduce. And the forming quality of the parts and service life of the die were ensured.
作者
吴进
王成勇
项志伟
叶鹏飞
陈锦洪
WU Jin;WANG Cheng-yong;XIANG Zhi-wei;YE Peng-fei;CHEN Jin-hong(School of Materials Science and Engineering,Hefei University of Technology,Hefei,Anhui 230009,China)
出处
《模具工业》
2018年第11期15-19,共5页
Die & Mould Industry
关键词
大长径比筒形件
正交试验
正挤压
工艺优化
入模角
cylinder with large length-diameter ratio
orthogonal test
forward extrusion
process optimization
entrance angle
