热冲压模具冷却系统数值模拟研究.PDF

上半月出版 Casting Forging Welding 金属铸锻焊技术 热冲压模具冷却系统数值模拟研究 辛志宇 高乃平 朱彤 渊同济大学机械工程学院袁上海200092 冤 摘 要院分析了计算流体力学模拟方法中模具冷却系统传热过程的流固耦合方法和第三类边界条件法的计算量 和准确度袁发现两种方法的模拟结果接近遥前者可以准确地反映冷却水管内的流速及温度分布以及模具内的导 过程曰 后者仅分析模具的导热过程袁计算模型简单尧耗时短袁是一种比较高效的近似模拟方法遥 通过分析热冲压模具内的传 机理可知袁模具内的导 阻是整个传热过程中的主要 阻遥 关键词院热冲压成形曰模具冷却系统曰数值模拟 中图分类号院TG3 15.2 文献标识码院A 文章编号院 Numerical Simulation Investigation on Cooling System of Die in Hot Stamping Process XIN Zhiyu, GAO Naiping, ZHU Tong (College of Mechanical Engineering, Tongj i Univ ers ity, Shanghai 200092, China) Abstract 院 Through comparison of the heat transfer coefficients and temperature distributions in the die from the fluid-solid coupling method and the simplified third-boundary-condition method, it was found that the two methods gave similar results. The coupling method can accurately reflect the velocity and temperature fields in the water pipes and the heat conduction process inside the die. The simplified method is an approximate method with high efficiency since the computational load is smaller than the former one. By analyzing the heat removal mechanism of hot stamping die, it is known that the thermal resistance in the solid die is the main resistance in the overall heat transfer process. Key words 院 hot stamping; cooling system; numerical simulation [7-9] 热冲压成形工艺是将钢板加 到奥氏体状态温 接触面上要求保持紧密光滑接触袁不能有缝隙 袁