铝合金框体挤压件折叠缺陷改进方案的研究  

Research on Improvement Scheme of Folding Defects for Aluminum Alloy Frame Extrusion Forgings

作　　者：刘翠侠[1] 张治民[1] 李国俊[1] 薛勇[1] 张福祥[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051

出　　处：《热加工工艺》2015年第7期157-160,共4页Hot Working Technology

基　　金：国家973研究专项(2012CB626808);山西省自然科学基金项目(2013011022-5)

摘　　要：框体属于体积分配不均、内部结构复杂且截面积不对称的零件。在挤压的过程中,毛坯材料和模具结构导致材料出现上翻折叠缺陷,影响零件的性能。通过有限元模拟,对某铝合金框体零件在挤压成形过程中坯料上翻折叠的缺陷进行了分析,并提出了合理的解决方案即改进预成形毛坯形状。通过计算机模拟验证了此方案的有效性及可行性,最终制定了合理的挤压成形工艺方案。A frame is the part of uneven volume, complex internal structure and the asymmetric cross-sectional area. Blank and die structure lead to the folding defects of material upturning during the extrusion process, which affects the performance of the frame parts. The folding defects of blank upturning of aluminum alloy flame parts during extrusion process were analyzed through finite element simulation. And reasonable solution improving the preform shape was put forward. The validity and feasibility of the scheme were verified through computer simulation. Eventually, the reasonable extrusion process scheme was formulated.

关 键 词：铝合金 热挤压 框体 折叠 

分 类 号：TG376.2[金属学及工艺—金属压力加工]