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首页> 外文期刊>Journal of Manufacturing Processes >Warm forming die design, Part Ⅲ: Design and validation of a warm forming die
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Warm forming die design, Part Ⅲ: Design and validation of a warm forming die

机译：热成型模具设计，第三部分：热成型模具的设计和验证

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摘要

Warm forming is a sheet metal stamping process at elevated temperature that can significantly expand the forming limits of light weight alloys such as aluminum. Most of the work detailed in the literature has been based on a laboratory setting with minimal guidance on how to design warm forming dies for high-volume production. The challenges that arise when transferring this technology from the laboratory to production are generally focused on the attainment of thermal stability within the die. Thermal stability is required to both maintain the dimensions of the matched die and to provide the sheet with ample formability. Achieving a thermally stable die is a direct function of how the die is heated and insulated. When this is done properly, temperature gradients throughout the die and at the parting surface can be minimized. This work outlines the upfront design approach used for a production-level warm forming die. The die was designed utilizing analytical and thermal finite element analysis tools that were developed specifically to assist with the identification of key design characteristics, such as heater wattages and locations, thermocouple placement, insulation strategy, and overall die architecture. A three-piece warm forming die fitted with resistance heating cartridges was constructed based on the presented design approach. The performance of the die was then validated through simulation and experimental comparisons. The results confirm the performance of the die and validate the predictability of the steady-state temperature response of the parting surface by the thermal finite element software.
机译：温热成型是在高温下进行的钣金冲压工艺，可以显着扩大轻质合金（如铝）的成型极限。文献中详述的大多数工作都是基于实验室环境，对如何设计用于大批量生产的热成型模具的指导很少。将这项技术从实验室转移到生产中时出现的挑战通常集中在实现芯片内部的热稳定性上。为了保持匹配模具的尺寸并为片材提供足够的可成形性，既需要热稳定性。实现热稳定的模具是模具被加热和绝缘的直接功能。正确完成此操作后，整个模具和分型面的温度梯度都可以降到最低。这项工作概述了用于生产级热成型模具的前期设计方法。模具是利用分析和热有限元分析工具进行设计的，这些工具是专门为帮助识别关键设计特征而设计的，例如加热器的功率和位置，热电偶的放置，绝缘策略以及整个模具的结构。基于提出的设计方法，构造了一个三件式热成型模具，该模具配有电阻加热盒。然后通过仿真和实验比较来验证模具的性能。结果证实了模具的性能，并通过热有限元软件验证了分型面的稳态温度响应的可预测性。

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