( 哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院, 哈爾濱 150001)
摘 要: 采用DEFORM-2D有限元模擬軟件研究液體壓力、 沖頭直徑以及管坯壁厚的變化對液壓沖孔過程的影響， 獲得沖頭推力、 沖孔后縱向塌陷尺寸和塌陷區(qū)域面積在不同控制參數(shù)下的變化趨勢， 并進(jìn)行工藝實驗驗證。 結(jié)果表明： 管內(nèi)液體壓力增加、 沖頭直徑增加、 材料壁厚增加都會使沖頭推力增大； 沖頭直徑和液體壓力對塌陷影響較大， 隨著沖頭直徑的增加和內(nèi)壓的降低， 塌陷深度尺寸和塌陷區(qū)域面積都明顯加大， 材料壁厚對塌陷尺寸的影響較小。
關(guān)鍵字: 液壓沖孔； 數(shù)值模擬； 空心構(gòu)件； 沖頭推力
（ 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
