( 哈尔滨工业大学 材料科学与工程学院, 哈尔滨 150001)
摘 要: 采用DEFORM-2D有限元模拟软件研究液体压力、 冲头直径以及管坯壁厚的变化对液压冲孔过程的影响， 获得冲头推力、 冲孔后纵向塌陷尺寸和塌陷区域面积在不同控制参数下的变化趋势， 并进行工艺实验验证。 结果表明： 管内液体压力增加、 冲头直径增加、 材料壁厚增加都会使冲头推力增大； 冲头直径和液体压力对塌陷影响较大， 随着冲头直径的增加和内压的降低， 塌陷深度尺寸和塌陷区域面积都明显加大， 材料壁厚对塌陷尺寸的影响较小。
关键字: 液压冲孔； 数值模拟； 空心构件； 冲头推力
（ School of Materials Science and Engineering, Harbin Institute of Technology,Harbin 150001, China）
Abstract: A numerical simulation was conducted to investigate the effect of the hydraulic pressure, the punch-diameter and the thickness of tube on the process of hydro-piercing by finite element program DEFORM-2D, and the variety trend of the punch-force, the roll-width and depth was obtained and verified through experiment. The result shows that the punch-force increases with the increasing of the hydraulic pressure, the punch diameter and the thickness of the tube. The roll-width and the depth of the sheared plane increase with the increasing of the punch diameter and the decreasing of the hydraulic pressure, while the influence of the tube thickness is indistinctive.
Key words: hydro-piercing; numerical simulation; hollow component; punch-force
