In this study, an improved flat-clinching process was presented. The improved flat-clinching process, i.e., flat clinch-rivet process, adopting a specialized rivet and a flat anvil, evolves through four stages: (a) positioning; (b) extruding; (c) deforming; and (d) forming. The influences of rivet materials and rivet shapes on the material deforming behavior of flat clinch-rivet were studied utilizing the finite element method after experimental verification. The results showed that the rivet made of hard material would make for forming an effective flat clinch-riveted joint while the soft rivet would lead to flat clinch-rivet joint fail owing to no mechanical interlock formed between the sheets. Moreover, the qualities of the flat clinch-riveted joints vary with rivet shapes, and the side-concave rivet contributes to obtaining a flat clinch-riveted joint with excellent mechanical performance.

在这项研究中，提出了一种改进的平面铆接工艺。改进的平铆工艺，即平铆铆接工艺，采用专门的铆钉和平砧，经过四个阶段演变：(a)定位；(b) 挤压；(c) 变形；(d) 成形。经试验验证，采用有限元方法研究了铆钉材料和铆钉形状对平铆钉材料变形行为的影响。结果表明，硬质材料制成的铆钉有利于形成有效的平铆接，而软质铆钉由于板材之间没有形成机械互锁而导致平铆接失效。此外，平铆铆接接头的质量因铆钉形状而异，