东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (5): 728-733.DOI: 10.12068/j.issn.1005-3026.2019.05.023

• 机械工程 • 上一篇    下一篇

轧制差厚板横向弯曲工艺参数研究

张华伟, 王新刚, 陈小辉, 侯东晓   

  1. (东北大学秦皇岛分校 控制工程学院, 河北 秦皇岛066004)
  • 收稿日期:2018-04-11 修回日期:2018-04-11 出版日期:2019-05-15 发布日期:2019-05-17
  • 通讯作者: 张华伟
  • 作者简介:张华伟(1983-),男,黑龙江鹤岗人,东北大学秦皇岛分校讲师,博士.
  • 基金资助:
    国家自然科学基金资助项目(51475086); 河北省自然科学基金资助项目(E2016501118); 中央高校基本科研业务费专项资金资助项目(N172304036); 河北省高等学校科学技术研究重点项目(ZD2017315).

Study on Process Parameters in Transverse Bending of Tailor Rolled Blanks

ZHANG Hua-wei, WANG Xin-gang, CHEN Xiao-hui, HOU Dong-xiao   

  1. School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
  • Received:2018-04-11 Revised:2018-04-11 Online:2019-05-15 Published:2019-05-17
  • Contact: ZHANG Hua-wei
  • About author:-
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摘要: 以U型件为对象,研究分析了差厚板的横向弯曲成形性能与特点,探讨弯曲回弹以及过渡区移动等缺陷的发生机理.在此基础上,重点讨论工艺参数对差厚板回弹和过渡区移动的影响规律.结果表明,差厚板的回弹随着压边力的增大逐渐减小,这种趋势对于未退火差厚板尤为显著,随摩擦系数的增大而呈现先减小后增大的趋势,随模具间隙的增大而增大;过渡区移动量则随压边力的增大先递减而后递增,随着摩擦系数的增大而逐渐减小,而受模具间隙的影响较小.采用(1~4)t的压边力、0.12左右的摩擦系数以及2.2~2.4mm的模具间隙对于控制回弹以及过渡区移动量是非常有利的.

关键词: 轧制差厚板, 横向弯曲, 工艺参数, 退火, U型件

Abstract: The forming properties and characteristics of tailor rolled blanks(TRB)in transverse bending process were studied by taking U-channel as the research object. The mechanisms of forming defects, including bending springback and thickness transition zone(TTZ)movement etc., were discussed. On this basis, the special emphasis was put on the effects of process parameters on springback and TTZ movement. Results indicated that the springback of TRB decreases with the increase of blank holder force(BHF), and this trend is especially prominent for unannealed TRB. Springback decreases first and then increases with the increase of friction coefficient, and increases with the increase of die clearance. TTZ movement decreases first and then increases with the increase of BHF, decreases with the increase of friction coefficient, and it is almost not affected by die clearance. Overall, BHF of (1~4)t, friction coefficient of around 0.12 and die clearance of 2.2~2.4mm are advantageous in controlling springback and TTZ movement.

Key words: tailor rolled blank(TRB), transverse bending, process parameters, annealing, U-channel

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