| 引用本文: | 王克环,高贵麟,董哲,刘钢.预拉深对气胀钛合金筒形件壁厚均匀性的影响[J].材料科学与工艺,2012,20(4):33-37.DOI:10.11951/j.issn.1005-0299.20120406. |
| WANG Ke-huan,GAO Gui-lin,DONG Zhe,LIU Gang.Effect of pre-deep-drawing on thickness uniformity of Ti-alloy cup-shaped parts formed by gas bulging[J].Materials Science and Technology,2012,20(4):33-37.DOI:10.11951/j.issn.1005-0299.20120406. |
|
| 摘要: |
| 以钛合金筒形件为研究对象,针对传统气胀成形存在减薄率过大问题,开展了预拉深-气胀复合成形方法研究。采用数值模拟分析了传统气胀成形中筒底减薄率过大的原因,实验研究了不同加载路径对TA15筒形件减薄率的影响。结果表明:气胀成形的加载速度对减薄率有一定的影响,慢速气胀和快速气胀成形件最大减薄率分别为63.2%、54.2%,仅提高加载速度并不能满足壁厚均匀性要求；在有一定预拉深的情况下,通过热拉深-气胀复合成形,最大减薄率可减小到36.7%。热拉深-气胀复合成形工艺可有效改善成形件的壁厚分布均匀性. |
| 关键词: TA15钛合金 热拉深-气胀成形 气胀成形 减薄率 壁厚均匀性 |
| DOI：10.11951/j.issn.1005-0299.20120406 |
| 分类号: |
| 基金项目:载运工具与装备教育部重点实验室开放基金(No.09JD18);中央高校基本科研业务费专项资金资助(HIT.BRET1.2010010). |
|
| Effect of pre-deep-drawing on thickness uniformity of Ti-alloy cup-shaped parts formed by gas bulging |
|
WANG Ke-huan1, GAO Gui-lin2, DONG Zhe1, LIU Gang1
|
|
1.National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;2.FAW Car Co.,Ltd,Changchun 130012,China
|
| Abstract: |
| In the traditional gas bulging process,excessive thinning often happens.To improve the thickness uniformity of Ti-alloy cup-shaped parts formed by gas bulging,a process combined with drawing and gas bulging is researched.The reason for excessive thinning in gas bulging process is analyzed by numerical simulation,and the effects of loading paths on thinning ratio of TA15 cup-shaped part formed in the process are studied by experiments.The results show that the loading speed of gas pressure influences the thinning ratio.The maximum thinning ratios of the parts formed by slow gas bulging and fast gas bulging are 63.2% and 54.2%.The requirement of thickness uniformity cannot be satisfied by increasing loading speed alone.However,the maximum thinning ratio of the part formed by drawing and gas bulging can be reduced to 36.7%.It is illustrated that the thickness uniformity can be improved effectively by the hot deep drawing-gas bulging process. |
| Key words: TA15 titanium alloy hot deep drawing-gas bulging gas bulging thinning ratio thickness uniform |
