外压成形试验装置及成形特征研究  

Research on the experiment instrument and the characteristics of external pressure forming

作　　者：刘钢[1] 苑世剑[1] 阴雪莲[1] 苗启斌[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《材料科学与工艺》2006年第1期15-17,53,共4页Materials Science and Technology

基　　金：哈尔滨工业大学校科学研究基金资助项目(HIT.2002.33)

摘　　要：设计制造了管材外压成形试验装置,在该装置上实现了管材外侧的高压密封和内部芯模的拆装.采用碳钢管进行了薄壁空心花键件的外压成形试验研究,利用液体介质在管坯外部建立静水压力,使坯料横截面缩小并成形到置于其内部的芯模上,从而获得了空心花键形状的试验件.试验反映了外压成形压力较低、壁厚分布较均匀的特点,所获得的成形件内表面形状与芯模的外表面形状基本一致,同时,成形中不同键位管壁失稳的随机性,对成形件壁厚分布有一定影响.An experiment instrument of external pressure forming （EPF） is designed and manufactured to realize the high pressure sealing on the outside of tube blank and assembly and disassembly of the mandrel in the tube blank. Tube blanks of low carbon steel are applied to carry out EPF experiments of a thinwalled hollow spline part. The hydrostatic pressure is built through hydro media surrounding the tube and compresses the cross-section of the tube blank onto the mandrel to form the hollow spline part. The results indicate that the pressure required for the EPF is relatively low and the thickness distribution is uniform. Especially, the inner contour of the formed part is in agreement with the outer contour of the mandrel generally. The randomicity of the tube instability at different keyway has a little effect on the thickness distribution of the formed part.

关 键 词：外压成形 管材屈曲 轻量化构件 液压成形 

分 类 号：TG174.453[金属学及工艺—金属表面处理]