李超,王国峰,潘显荣,等.电流辅助高强钢板热成形工艺数值模拟研究[J].精密成形工程,2016,8(5):116-120.
LI Chao,WANG Guo-feng,PAN Xian-rong,et al.Numerical Simulation of Current Assisted Hot Stamping of High Strength Steel[J].Journal of Netshape Forming Engineering,2016,8(5):116-120. |
| 电流辅助高强钢板热成形工艺数值模拟研究 |
| Numerical Simulation of Current Assisted Hot Stamping of High Strength Steel |
| 投稿时间：2016-08-27 修订日期：2016-09-10 |
| DOI：10.3969/j.issn.1674-6457.2016.05.018 |
| 中文关键词: 电流辅助 高强钢板 热成形 数值模拟 |
| 英文关键词: current assisted high strength steel hot stamping numerical simulation |
| 基金项目:黑龙江省教育厅科学技术研究资助项目(12531147)；国家自然科学基金青年基金(51305110) |
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| 中文摘要: |
| 目的 探究电流辅助高强钢板热成形工艺中坯料自阻加热的加热机理，揭示电-热-力三场耦合条件下金属板材的塑形变形规律，为工艺方案及工艺参数的制定提供理论依据。方法 利用FEM软件对电流辅助高强钢板的热成形过程进行了数值模拟研究。结果 获得了通电加热时坯料的温度场，并通过热-力耦合分析，得到了板材热成形时的应力及应变的分布规律。结论 采用该加热方式可极大地提高加热速率，经过几十秒的加热即在变形坯料上获得了较均匀的温度场，满足板材热成形要求。应力、应变分析表明，加热时产生的压应力缓解了坯料变形时的应力集中，有助于板料塑性成形。 |
| 英文摘要: |
| To reveal the mechanism of resistance heating and to reveal the sheet metal deformation law during the current assisted hot stamping of high strength steel, FEM software was applied to numerical simulate this process. The temperature distribution on the metal plate blank has been obtained, and the regularities of distribution of stress and strain have also been solved. The results show that the heating efficiency could be significantly improved by this method, and the appropriate temperature field for the hot stamping could also be obtained. During the forming process, the stress concentration has been decreased by the compressive stress which was generated by the heating process, which was helpful to the sheet metal forming. |
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