阿基米得螺线系数选择对模拟钛弯管推扩成形的影响  

Effect of Archimedes Parameter on the Simulation of Thermal Pushing of Ti Bending Pipe

作　　者：苏航标[1] 曾卫东[1] 赵永庆[1] 杨英丽[2] 殷京瓯[2] 赵恒章[2] 赵彬[2] 林桥[2] 吴金平[2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2008年第5期775-778,共4页Rare Metal Materials and Engineering

摘　　要：采用MSC公司的Superform软件对不同阿基米得螺线系数下的热推扩进行了模拟。扩径段采用了3种不同的系数并分析了不同系数下对热推扩成形弯管的影响。结果表明:扩径变形段中心轴线采用曲率半径渐变的阿基米得螺线,有利于管坯凹面金属充分向凸面流动,避免了传统弯曲变形内侧受压增厚,外侧受拉减薄;阿基米得螺线系数a≤0.9时,环向厚度差大;a≥1.3时,容易出现起皱和45o剪切变薄。本试验范围内,a值取1.0最佳。Thermal pushing forming is an effective technology of manufacture for bending pipes. In order to get the products of uniform wall thickness, a commercial software, Superform of MSC, is used to simulate the thermal pushing of Titanium bending pipes. The effects of Archimedes Parameter on the simulation of thermal pushing of Ti bending pipes have been analyzed in this paper by using different Archimedes coefficients for the expanded diameter section. It is found that it benefits the metal flowing uniformity from the concave to the convexity by using gradual Archimedean spiral for the expanded diameter section, avoiding the increase of inner wall thickness and the decrease of outer wall thickness during pipe bending. The difference of ring wall thickness is smaller when the Archimedes coefficient a is 0.9; but it is easy to corrugate and to be thinner for the wall thickness when a is 1.3. The optimal Archimedes coefficient a is 1.0 according to this study.

关 键 词：弯管 模拟 阿基米得螺线系数 

分 类 号：TG306[金属学及工艺—金属压力加工]