First of all, we will talk about the application and characteristics of tubular rivets. The tubular rivet joints are similar to the hollow rivets, and the non-bearing structures are connected by fasteners.

The hollow cavity of the rivet can be used to cross the pipeline and is widely used for small structural parts such as electronic circuit boards, electrical equipment, household appliances, clothing signs, electronic products, office supplies, and softer materials such as plastic or fiber. The connected tubular body is weaker than the semi-tubular rivet, and is not suitable for shearing, and is not suitable for tensile force, and is not suitable for occasions subjected to severe impact and vibration.

How are the small tubular rivets buckled tightly? To understand its working principle, first riveting the workpiece requires pre-punching, then inserting the tubular rivet, and forming a joint between the rivets on the riveted sheet material. The hollow or tubular rivet used is first used as a joining tool and then plastically deformed together with the riveted sheet material for the purpose of joining. There are several types of pre-punching riveting. When the tubular rivet is pressed by the punch, the rivet head expands to achieve the flanging effect, and the rivet is combined with the lower layer to form a mechanical interlock mechanism between the sheets. Riveting.

With the development of modern industry, the demand for social economy is getting higher and higher, so that the automotive industry products in life pay more attention to the lightweight and high quality of the assembly, and seek to reduce the quality of the body, one of which is to use Lightweight materials such as tubular rivets, full hollow rivets, etc. So far, spot welding (resistance welding) is the main method of connecting the steel plate body structure, which is not only conducive to mass production, but also reliable and reliable; but for the connection of black metal and non-ferrous metal, between non-ferrous metals (such as thin aluminum plates) Connections, metal to non-metal connections, non-metal connections, spot welding is difficult or powerless.



As a mass-produced car, in the connection of body parts bonding, welding, riveting, etc., in order to meet the needs of rapid and automated production, riveting is increasingly valued and favored in order to connect materials that cannot be spot welded and difficult to spot weld. .



Stamping riveting process of tubular rivet The punch firstly moves down to pre-compact the riveting material to prevent the material from flowing into the die under the force of the rivet, and the downward punch moves the rivet to puncture the upper material downward. Under the joint action of the die and the punch, the rivet tail is opened in the lower metal to form a bell mouth shape to lock the riveting material for the purpose of connection.



In the manufacture of automobile bodies, the pre-punching riveting process of hollow rivets is mainly used in the lightweight production of automobiles. The tubular riveting process is thicker placed on the lower layer when riveting the same metal material; the plasticity is placed on the lower layer when two layers of different metal materials are used; when the metal and non-metal materials are riveted, the metal material is placed on the lower layer.