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大型截面7A09铝型材拉弯成形工艺研究
英文标题:Research on stretch bending process of 7A09 aluminum profile with large cross-sectional area
作者:王妍琴 刘京平 马凯 王悦 王东 
单位:天津航天长征火箭制造有限公司 首都航天机械公司 
关键词:7A09铝型材 拉弯 回弹 预拉力 补拉量 
分类号:TH162
出版年,卷(期):页码:2015,40(2):76-78
摘要:
大型复杂截面的型材框在新型运载型号中有着广泛的应用。针对大型横截面积、弯曲直径为Φ5 m的型材框零件进行拉弯成形工艺研究。通过分析润滑方式、预拉力、补拉量等参数对零件回弹的影响,设计拉弯工艺参数:预拉力为450 kN,预拉包角为72°,补拉力为500 kN,补拉包角为82°,补拉量为50 mm。试验表明,采用以上工艺参数得到零件端头回弹量为2.5~3 mm,验证了工艺参数的可行性。通过试验,得到了大型截面、大弯曲直径零件的成形工艺方法,且产品满足使用要求。
 
Aluminum extrusion with large or complex cross-sectional area is widely used in new aerospace launch vehicle. The process of stretch bending for large cross-sectional area with a bending diameter of 5 m was discussed. According to the analysis on influences of lubrication, pre-stretching force and post-stretching on springback, a set of optimum technologic parameters was established, namely 450 kN pre-stretching force, 72° pre-stretching angle, 500 kN post-stretching force, 82° post-stretching angle and 50 mm post-stretching value. The experiments show that the springback of the part end is 2.5-3 mm, so the technologic parameters can be adopted. The aluminum extrusion with large cross-sectional area and bending diameter is obtained and satisfies the requirements of the products.
基金项目:
国家自然科学基金资助项目(51275130)
作者简介:
王妍琴(1987-),女,硕士,助理工程师
参考文献:


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