冲击式自穿孔铆接方法及其接头性能

Method of self-piercing riveting and properties of its joint

关键词:  自穿孔铆接  铝合金  点焊  汽车

Key words:  self-pierce riveting  aluminum alloys  resistance spot welding  automotive

摘要:

采用一种新型的应用火药作为驱动力的铆接方法和试验设备。对影响该方法的主要因素如模具尺寸、铆钉硬度进行分析。用该设备铆接铝合金板形成的接头的拉剪强度、十字抗拉强度以及疲劳强度与点焊形成的接头进行比较。试验证明这种新型的自穿孔铆接接头比点焊接头有更好的力学性能。

Abstract:

Self-piercing riveting,(SPR) has become an important alternative joining technique for the automotive applications of aluminum sheets.Most existing SPR machines use a dual-action hydraulic cylinder or an electrical motor to drive a rivet into the sheets.A new technique and the corresponding equipment was presented using gun-powder to drive the riveting process.Some main factors such as the dimensions of the die,the rigidity of the rivet were also researched.The tensile-shear,cross-tension,fatigue and impact performances of self-piercing riveted joints using the new device were compared with those of spot-welded joints on aluminum sheets.The experiment proved that the new SPR joints had provided a better mechanical properties than that of resistance spot welded joint.