Increasing of the drawing depth using tailor rolled blanks - Numerical and experimental analysis
Increasing of the drawing depth using tailor rolled blanks - Numerical and experimental analysis
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DOI：
10.1016/j.ijmachtools.2007.08.003
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发表时间：
2008-04-01
影响因子：
14
通讯作者：
Hirt, G.
中科院分区：
文献类型：
--
作者：
Meyer, A.;Wietbrock, B.;Hirt, G.
拉深是一种常见的金属板材成形工艺。在大多数情况下，成形的是厚度恒定的板材。上世纪末，为了减轻重量，新的创新坯料技术得以确立。柔性轧制工艺的发展就是这一进步的一个例证。通过在轧制过程中改变辊缝，可产生纵向厚度变化。以这种方式生产的创新型半成品被称为差厚板（TRB）。它在进一步加工过程中，特别是在成形过程中的行为和特性是当前研究的课题。本文的重点在于这样一个观点，即与厚度恒定的坯料相比，差厚板可用于增加最大拉深深度。这可以通过以某种方式“削弱”坯料的某些区域，从而降低关键区域的失效载荷来实现。为了在增加最大拉深深度的同时确保减轻重量，差厚板的最大板材厚度等于其他坯料的恒定厚度。这个概念首先借助数值模拟进行分析，然后通过实验工作进行验证。（c）2007爱思唯尔有限公司。保留所有权利。
Deep drawing is a common sheet metal forming process. In most cases, sheets with constant thicknesses are formed. At the end of the previous century, new innovative blank technologies have been established for weight saving purposes. The development of the flexible rolling process is an illustrating example for this progression. By changing the roll gap during rolling, longitudinal thickness transitions are produced. The innovative semi-finished product, which is produced in this manner, is called tailor rolled blank (TRB). Its behaviour and characteristics during further processing, especially in forming, are topics of present research. The main emphasis of this paper is placed on the idea that TRB can be used to increase the maximum deep drawing depth compared to blanks having a constant thickness. This can be realised by "weakening" certain areas of the blank in a way that the load in failure at critical areas is reduced. To ensure weight saving in addition to increasing the maximum deep drawing depth, the maximum sheet thickness of the TRB is equal to the constant thickness of the other blanks. The concept is first analysed with the help of numerical simulations and then verified by experimental work. (c) 2007 Elsevier Ltd. All rights reserved.