Extrusion of sector shell of magnesium alloy
The backward extrusion process of a sector shell has been studied by numerical simulation. Unformed defect at the oral part of extruded shells induced by the billet shape has been solved and the forming process has been designed on the basis of numerical simulation. Experiment has been done for the forming of sector shell at 380 °C and the crack at the outside wall has been found in the center of extruded shell. Choked groove at the inner wall of die and reducing the lubrication have been used to solve the problem of cracking and the shell without cracking has been formed. The inner shape of warm extruded shell was cold sized and its dimensional precision and surface roughness met the requirement of the shell.
sector shell magnesium alloy extrusion cold sizing
ZHANG Baohong ZHANG Zhimin
School of Materials Science and Engineering,North University of China,taiyuan 030051,China Engineering Research Center for Magnesium-base Material Processing Technology,Ministry of Education,
国际会议
The 12th Asian Symposium on Precision Forging 第12届亚洲精密锻造学术研讨会 ASPF2012
苏州
英文
201-205
2012-10-21（万方平台首次上网日期，不代表论文的发表时间）