Determination of the interfacial heat transfer coefficient for a hot aluminium stamping process
Determination of the interfacial heat transfer coefficient for a hot aluminium stamping process
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DOI：
10.1016/j.jmatprotec.2017.04.005
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发表时间：
2017-09-01
影响因子：
6.3
通讯作者：
Wang, LiLiang
中科院分区：
文献类型：
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作者：
Liu, Xiaochuan;Ji, Kang;Wang, LiLiang
界面传热系数（IHTC）是热冲压工艺中的一个重要热物理参数，必须确定它不仅可以保持成形部件的全部机械强度，还可以优化生产率。本研究开发了一种新型的实验装置，用于测量冲压过程中试件和模具的温度变化。然后将使用FE软件PAM-STAMP获得的模拟温度演变与该数据拟合。在不同的接触压力下，在干燥和润滑条件下，AA 7075和三种不同的工具材料之间的IHTC值进行了表征。此外，基于机理的IHTC模型被开发和验证为接触压力，刀具材料和润滑剂厚度的函数，以预测不同条件下的IHTC值。
The interfacial heat transfer coefficient (IHTC) is an important thermophysical parameter in hot stamping processes and must be identified not only to retain the full mechanical strength of formed components, but also to optimise the production rate. In this work, a novel experimental facility was developed and applied to measure the temperature evolutions of the specimens and tools in stamping processes. Simulated temperature evolutions obtained using the FE software PAM-STAMP were then fit to this data. The IHTC values between AA7075 and three different tool materials were characterized at different contact pressures under both dry and lubricated conditions. In addition, a mechanism based IHTC model was developed and validated as a function of contact pressure, tool material and lubricant thickness to predict the IHTC values under different conditions.