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基于数值模拟的薄壁管冷弯成形工艺研究
英文标题:Study of forming process for thingwalled tube rotary bending based on numerical simulation
作者:李思漪 夏琴香 盛湘飞 廖友辉 
单位:华南理工大学 广东省肇庆市骏驰科技有限公司 
关键词:薄壁管 冷弯成形 起皱 减薄 数值模拟 
分类号:TG386.43;TG386.3+1
出版年,卷(期):页码:2011,36(4):163-167
摘要:

薄壁管冷弯成形过程中最常见的缺陷有管坯内侧失稳起皱、外侧减薄破裂,为获得质量良好的某车用水冷管接头冷弯件,采用数值模拟方法分别研究了芯棒伸出量e、防皱块与管坯间隙c以及芯棒直径d等工艺参数对冷弯成形质量的影响。结果表明:随着芯棒伸出量e增大,管坯外侧壁厚减薄率γ增大,管坯内侧起皱趋势先减小再增大;随着管坯与防皱块的间隙c增大,管坯内侧起皱趋势增大,当间隙较小时外侧减薄率γ变化不大,而当间隙增加到一定数值,外侧减薄率γ明显增加;随着芯棒直径d增加,管坯内侧起皱趋势减弱,外侧减薄率γ增加。

Inner wall wrinkle and outer wall thinning are the main defects occurred during thin walled tube rotary bending.The influence of different processing parameters,such as the mandrel extension length e,the clearance between wiper die and tube c,and the mandrel diameter d on the forming quality were analyzed based on numerical simulation method to avoid the defects during tube rotary bending of automotive water cooled tube.The results show that the larger the mandrel extension length e,the greater the thickness thinning r of the outer wall of workpiece,and the wrinkling tendency decreases firstly and then increases.With the increasing of the clearance c,wrinkling tendency increases.The variation of thickness thinning γ is less when the clearance c is small,and when the clearance c increases to a certain value,the thickness thinning γ increases significantly.With the increasing of the mandrel diameter d,the wrinkling tendency decreases,and the thickness thinning γ increases.

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