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首页> 外文期刊>Procedia Manufacturing >Case Study: Modeling of the cycle time reduction in a B-Pillar hot stamping operation using conformal cooling
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Case Study: Modeling of the cycle time reduction in a B-Pillar hot stamping operation using conformal cooling

机译：案例研究：使用保形冷却模拟B柱热冲压操作的循环时间降低

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摘要

Increasing demand in the automotive industry for high strength and lightweight components has led to the promotion and development of hot stamping processes. The integration of adaptive or conformal cooling channels within the stamping tools opens the possibility to increase the cooling performance of the process, thus improving not only the quality of the final part but also shortening the process cycle. The present work aims to evaluate the thermal field of the stamped blank, as well as to quantify the cycle-time reduction and the process efficiency in the hot stamping of a B-pillar type geometry when using conformal instead of straight-drilled cooling channels. To that end, a transient thermal simulation of the hot-stamping process is performed by means of ANSYS workbench software. Thirty consecutive stamping operations, including the intermediate cooling stages required for the blank unloading and loading, are simulated in order to ensure that the tools have reached a thermally stable regime. In this situation, the temperature differences in the tools, as well as their influence in the cooling process of the blank have been studied. Based on the obtained results, it is concluded that conformal cooling enables to reduce the cycle time by 3 s when compared to the straight-drilled tool, which involves a 15% process performance increase. Besides, positioning the conformal cooling channels closer to the surface implies a 5 s cycle-time reduction with regard to the straight-drilled tool, which leads to a 25% process-time reduction, and therefore, productivity increase.
机译：汽车行业对高强度和轻量级部件的需求越来越大，导致了热冲压过程的推广和发展。在冲压工具内的自适应或保形冷却通道的整合打开了增加该过程的冷却性能的可能性，因此不仅改善了最终部分的质量，而且还改善了工艺循环的质量。当前工作旨在评估冲压坯料的热场，以及量化使用保形代替直流冷却通道时的B柱型几何形状的热冲压中的循环时间减小和过程效率。为此，通过ANSYS Workbench软件执行热冲压过程的瞬态热模拟。模拟了三十连续冲压操作，包括空白卸载和加载所需的中间冷却阶段，以确保工具达到热稳定的制度。在这种情况下，研究了工具中的温度差异，以及它们在坯料的冷却过程中的影响。基于所得的结果，结论是，与直钻工具相比，保全冷却能够通过3秒减少循环时间，这涉及15％的工艺性能增加。此外，定位靠近表面的保形冷却通道意味着关于直接钻孔工具的5次循环时间减少，这导致了25％的处理时间减少，因此生产率增加。

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