李智军,杨合,孙志超.辊缝变化模型在面内弯曲精确成形中的应用[J].精密成形工程,2009,1(1):70-76.
LI Zhi-jun,YANG He,SUN Zhi-chao.Application of Gap Changing Model in In-plane Bending Precision Forming[J].Journal of Netshape Forming Engineering,2009,1(1):70-76. |
| 辊缝变化模型在面内弯曲精确成形中的应用 |
| Application of Gap Changing Model in In-plane Bending Precision Forming |
| 投稿时间：2009-05-31 修订日期：2009-07-10 |
| DOI： |
| 中文关键词: 连续局部不均匀加载 面内弯曲 弹性挠动 辊缝变化参数 精确控制 |
| 英文关键词: continuous local loading in-plane bending elastic deflection gap changing parameters precision control |
| 基金项目:国家杰出青年科学基金资助项目（50225518） |
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| 中文摘要: |
| 锥辊连续局部不均匀加载面内弯曲是通过对板带施加连续局部不均匀加载实现板带面内弯曲的一种锥辊轧制成形技术。由于成形中锥辊发生的弹性挠动，环形件的成形精度降低。调整初始参数可以有效补偿锥辊的弹性挠动，实现精确成形。而初始参数的调整需要确定锥辊弹性挠动引起的辊缝变化量与初始参数的关系。鲜飞军［8］在求解建立的辊缝变化模型时忽略了轧制力随辊缝变化参数的变化关系，导致参数预报误差较大。通过计算迭代求解了轧制力，修正了文献［8］建立的辊缝变化模型，验证了模型的可靠性，同时将模型应用于面内弯曲成形的精确控制。采用两种初始参数调整方法检验了参数的控制精度，结果表明，两种精确控制方法是可行的。 |
| 英文摘要: |
| The in-plane bending process under continuous conical local loading is a typical conical rolling technology that can shape strips to ring shape workpieces. The inevitable elastic deflection of conical roller during the in-plane bending has become a main factor that influences the precision of ring shape workpiece. A feasible way is to adjust initial parameters beforehand in order to compensate the deflection and to realize precision forming of in-plane bending. The relationship between initial parameters and the values of gap changing parameters caused by elastic deflection of conical roller is necessary in adjusting initial parameters. Xian［8］ did not consider the interactional relationship between the rolling force and gap changing parameters in solving the established gap changing model, which resulted in the deviation of model in deflection prediction. In this paper, the rolling force is calculated by iteration and a modified gap changing model is established, validated and applied to the precision control of in-plane bending. Two typical control methods by adjusting initial parameters are adopted to validate the precision of in-plane bending. The results show that precise control methods are reliable. |
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