Novel self-piercing rivet for steel-aluminum connection

The utility model discloses a novel self-piercing rivet for steel-aluminum connection. The novel self-piercing rivet comprises a rivet head and a rivet rod with a central rod hole, wherein the rivet rod is provided with a cylindrical inner surface and a cylindrical outer surface; the inner aperture of the inner surface of the central rod hole close to the opening is gradually increased towards theend surface of the rivet rod to form a conical surface; the conical surface intersects with the end face of the rivet rod to form an intersection line, and the distance S1 between the intersection line and the outer surface of the rivet rod is smaller than or equal to 0.2 mm. Compared with a self-piercing rivet in the prior art, the self-piercing rivet has better single-point connection strength.And the method can be applied to the automobile industry with high requirements on the strength and the design of connecting points. 本实用新型公开了一种用于钢铝连接的新型自冲铆钉，包括铆钉头和具有中心杆孔的铆钉杆；所述铆钉杆具有圆柱状的内表面和外表面；中心杆孔内表面靠近口部位置向铆钉杆端面方向的内孔径逐渐增大形成圆