铆接工艺广泛用于连接轻质钣金。我们提出了一种新颖的旋转铆接工艺(RCP),其特点是平底模具结构和双旋转冲头。本研究的目的是评估RCP接头的强度。使用厚度为1.5mm和2mm的Al1060片作为实验材料。制作了具有三个模具深度和五个底部厚度的重叠和T型搭接RCP接头,并对接头进行了剪切和剥离试验。根据机械载荷评估接头强度,横截面轮廓尺寸,和故障模式。结果表明,机械载荷是一种直接的,可靠,和定量评价标准,而横截面轮廓和失效模式是间接的和定性的。这些标准证实了厚板接头的强度高于薄板接头的强度,剪切强度优于剥离强度,接头的强度很高,破坏主要是由于撕裂或剪切破坏。最后,确定接头强度的关键参数包括底部厚度/板材厚度比(Rt),和模具深度(h)。
The clinching process is widely used in joining lightweight sheet metal. We proposed a novel rotated clinching process (RCP), which is characterized by a flat bottom die structure and twin rotating punches. The aim of this study was to evaluate the strength of RCP joints. Al1060 sheets with thicknesses of 1.5 mm and 2 mm were used as the experimental materials. Overlap and T-lap RCP joints with three die depths and five bottom thicknesses were fabricated, and shear and peel tests were performed on the joints. The joint strengths were evaluated based on the mechanical load, cross-sectional profile dimensions, and failure mode. The results showed that the mechanical load is a direct, reliable, and quantitative evaluation criterion, while the cross-sectional profile and failure mode are indirect and qualitative. These criteria confirmed that the strength of thick sheet joints is higher than that of thin sheet joints, the shear strength is superior to the peel strength, and the strengths of the joints are high with failure mainly occurring due to tearing or shear failure. Finally, the key parameters for determining the strength of a joint include the bottom thickness/sheet thickness ratio (Rt), and the die depth (h).