Approach to minimize the distortion of 6xxx-aluminum tailor heat treated blanks in industrial applications
Approach to minimize the distortion of 6xxx-aluminum tailor heat treated blanks in industrial applications
复制标题
在工业应用中最大限度地减少 6xxx 铝定制热处理毛坯变形的方法
DOI：
10.1007/s11740-015-0628-5
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Merklein
中科院分区：
文献类型：
--
作者：
Alexander Kahrimanidis;D. Wortberg;M. Merklein
摘要
定制热处理毛坯 (THTB) 是一种众所周知的方法，可显着提高 6xxx 铝合金的成形极限。这是通过使用短期热处理局部调整成型操作的机械性能来实现的。然而，由于加热区域的热膨胀，所产生的温度分布不可避免地导致毛坯变形。这对于 THTB 的自动化加工来说是一个挑战，因为必须保证尺寸精度和可堆叠性。在这项工作中，通过实验室实验研究了加热参数、模具设计和毛坯厚度对 6xxx THTB 变形行为的影响。为了表明原则上可以提前预测变形行为，使用热机械模拟来重新计算其中一项发现。实验室实验的结果在近串联加热工具上进行传输和验证。事实证明，可以通过使 THTB 的自动化处理成为可能的方式来最小化和控制失真。
Abstract
Tailor heat treated blanks (THTB) are a well-known approach to considerably enhance the forming limits of 6xxx-aluminum alloys. This is realized by locally adjusting the mechanical properties with regard to a forming operation using a short term heat treatment. However, the resulting temperature distribution unavoidably leads to distortion of the blank due to thermal expansion of the heated areas. This is challenging for automated processing of THTB since dimensional accuracy and stackability must be assured. In this work the influence of heating parameters, tool design and blank thickness on the distortion behavior of 6xxx THTB are investigated by laboratory experiments. To show that it is in principle possible to predict the distortion behavior in advance, a thermo-mechanical simulation is used to recalculate one of the findings. The results from laboratory experiments are transferred and validated on a near-series heating tool. It is demonstrated that distortion can be minimized and controlled in a way that automated processing of THTB becomes possible.