A novel approach for temperature control in ISF supported by laser and resistance heating
A novel approach for temperature control in ISF supported by laser and resistance heating
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DOI：
10.1007/s00170-012-4640-z
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发表时间：
2013-08-01
影响因子：
3.4
通讯作者：
Loosen, P.
中科院分区：
文献类型：
--
作者：
Goettmann, A.;Bailly, D.;Loosen, P.
航空应用通常需要小批量的由钛及其合金制成的大型金属板零件。由于钛在室温下的成形性较低，因此必须采用热成形工艺。增量式钣金成形（ISF）不仅适用于生产大型零件，也适用于生产原型和小批量零件。简要回顾了国际科学家在热ISF领域所做的实验工作，包括固定和移动温度传感器，主要应用于金属板的背面。本文展示了一种新的工具设置方法，包括工具内部的热电偶。因此，测量温度的传感器随成形区移动。此外，还将提出一种合适的闭环控制方法，包括PID控制器。我们将讨论控制器的特性。通过两种不同的加热ISF过程（电阻加热ISF和激光辅助ISF），分析和评估了所开发装置的适用性。实验装置能够确保所需的最低温度，以确保Ti 5级的充分成形性。
Aeronautical applications often require small batches of large-scale sheet metal parts made from titanium and its alloys. Due to the low formability of titanium at room temperature, warm forming processes are necessary. Incremental sheet metal forming (ISF) is suitable for production of prototypes and small batches as well as large-scale parts. A short review of the experimental work done by international scientists in the field of warm ISF including stationary and moved temperature sensors will be presented mostly applied from the backside of the sheet metal. The present paper shows a new approach for a tool setup including a thermocouple inside of the tool. Hence, the sensor for temperature measurement was moved with the forming zone. Furthermore, a suitable closed loop control including a PID controller will be presented. The characteristics of the controller will be discussed. By means of two different warm ISF processes (ISF with resistance heating and laser-assisted ISF), the applicability of the developed setup will be analysed and evaluated. It will be shown that the experimental setup is capable to ensure minimal temperatures needed to ensure adequate formability of Ti grade 5.