摘要
采用冷挤压工艺成形支撑销,相对于传统切削加工方法,可降低能耗、提高工效。基于刚塑性有限元法,采用DEFORM-3D对支撑销冷挤压成形过程进行了数值模拟,揭示其变形过程中的金属流动规律,分析了速度场、应力应变场和凸模行程载荷曲线的特点,研究了挤压速度对支撑销挤压成形过程的影响规律。结果表明,支撑销的冷挤压成形过程可分为3个阶段:镦粗变形阶段、型腔填充阶段和最终成形阶段;支撑销两凸缘处变形较剧烈,应力最大;凸模运动速度越快,凸模受到的载荷越大。模拟结果表明,冷挤压成形支撑销工艺方案是可行的。
As for the manufacturing of support pin, adopting cold extrusion technology can decrease the cost and enhance the work efficiency in comparison with tradition cutting methods. Based on rigid and plastic FEM, the cold extrusion of support pin was simulated using DEFORM-3D. The metal flowing rule in the cold extrusion process was revealed, and the characteristics of velocity field, stress field, strain field and curve of distance-load were analyzed. The influence of extrusion velocity on stroke-load was investigated. The results show that the process of the cold extrusion can be expressed in three stages of upsetting stage, filling cavity stage and final shape stage. The deformation of the flanges of support pin is severe, and the stress of the flanges is biggest. The faster extrusion velocity is, the bigger the stroke-load is. The simulation results confirm that the process of cold extrusion forming support pin is feasible.
出处
《热加工工艺》
CSCD
北大核心
2013年第9期125-127,130,共4页
Hot Working Technology
基金
安徽工程大学科研启动基金项目(S01024)
