Experimental Investigation of the Shear Cutting Behaviour of Sandwich Panels
Experimental Investigation of the Shear Cutting Behaviour of Sandwich Panels
复制标题
夹芯板剪切性能的实验研究
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
P. Groche
中科院分区：
文献类型：
--
作者：
P. Stein;David Übelacker;Dirk Holke;P. Groche
汽车尾气排放标准不断提高，环保意识不断增强，促使设计工程师开发新的建设性和材料概念。所谓的夹心板，由坚硬的饰面和轻质的芯组成，提供了将不同材料的特性协同结合的可能性。当大量加工时，如在汽车工业中，通常用于切割夹芯板的制造工艺，如锯或铣削，都不适用。大量切割金属板材的一种常见制造工艺是剪切切割。然而，夹层板剪切切割的预试验表明，目前的工艺布局不可能实现完美的切割表面。确定了表面高弯曲、分层效应、毛刺形成和芯材未定义的开裂等特征失效类型。因此，在本研究中，研究了切削参数（如间隙和冲孔直径）对这些类型的失效的影响。在8 mm和32 mm两种冲孔直径下，研究了0.025 mm和0.4 mm之间的5种不同间隙。为了比较不同材料的影响，对三种市售夹芯板进行了研究。所选择的夹芯板在面板厚度和芯材上都有所不同。最后，对剪切力进行了测量，以确定剪切力与表面弯曲之间可能存在的相关性。因此，最优的间隙，以尽量减少表面弯曲推导。此外，还确定了芯刚度对切削力的影响。
Continually increasing exhaust emission standards for automobiles and an increasing environmental awareness push design engineers to develop new constructive and material concepts. So-called sandwich panels, consisting of stiff facings and light-weight cores, offer the possibility to combine properties of different materials synergistically. When processing large quantities, as is the case in the automotive industry commonly used manufacturing processes for cutting sandwich panels, like sawing or milling, are not applicable. A common manufacturing process to cut metal sheets in high quantities is shear cutting. However, pre-trials of shear cutting of sandwich panels have shown that it is not possible to achieve flawless cutting surfaces with current process layouts. Characteristic types of failure like high bending of the facings, delamination effects, burr formation and an undefined cracking of the core material were ascertained. Thus, in this study, the influence of cutting parameters, such as the clearance and the punch diameter, on these types of failure is examined. Five different clearances between 0.025 mm and 0.4 mm with two punch diameters, 8 mm and 32 mm, were investigated. In order to compare the influence of different materials, three commercially available sandwich panels were studied. The chosen sandwich panels differ both in the face sheet thickness and the core material. Finally, the shear cutting force is measured to identify a possible correlation between the cutting force and the face bending. As a result, optimal clearances to minimize the face bending are derived. Additionally, the influence of the core stiffness on the cutting force is determined.
影响因子：
6.2
作者：
M. Liewald;C. Bolay;S. Thullner
通讯作者：
M. Liewald;C. Bolay;S. Thullner
金属-聚合物-金属复合材料剪切切割的力要求
DOI：
10.4028/www.scientific.net/amr.1018.137
发表时间：
2014
期刊：
Advanced Materials Research
影响因子：
--
作者：
Übelacker;Hohmann;Johannes Groche
通讯作者：
Johannes Groche