Connection principle of self-piercing rivets

Update:28 Dec 2019
Summary:

Self-piercing rivets are widely used. They are suitable […]

Self-piercing rivets are widely used. They are suitable for the automotive industry, aluminum alloy doors and windows, and travel tools. The volume of such self-piercing rivets is relatively small, but the key is large. Rivets are often used in car bodies, assembly lines, and the external environment. Therefore, the development trend of self-piercing rivets is that the indoor space is relatively wide. Nowadays, aluminum alloy doors and windows are also used. The application of this type of rivets is not only easy to destroy the hot-dip galvanizing on the board. Layer, also preserves the original beauty and generosity; it is the same at the road transport level, the selected connections are very different, and the final efficacy is all the same. It has been used in so many manufacturing industries and has been It shows that the development trend of self-piercing rivets is quite large.
When the semi-hollow rivet is pressed down by the punching needle, the rivet penetrates the top thick plate, and its rivet expands with the next thick plate, creating a mechanical device self-locking interlocking organization between the two thick plates, and then connecting.
The whole process of the self-piercing riveting machine includes two parts: the blank and the die. The blank is established by the blank holder. The key function of the blank holder is to clamp the riveted thick plate during the whole process of self-piercing riveting. Wrinkle, to prevent the thick plate from being warped and deformed during the whole process of self-punching riveting due to the large punching pressure.
1. The technical requirements of cold-rolling riveting require a minimum value of pendulum-rolling force, which is only 1/12 to 1/16 of riveting methods such as hammering and stamping dies. Because the traditional riveting method is that the rivet rod exerts pressure on the rivet illustration, the closer the working pressure is to the pivot, the colder riveting method must be continuously deformed to form the rivet. The more the pressure is from the rivet management center, The farther and farther it goes, this is exactly the natural law of deformation of raw materials. Therefore, “the cold rolling riveting method requires a minimum of tons of machinery and equipment” to save costs.
2. When using cold-rolled riveting technical riveting, there is basically no noise (less than 75sbt) and no vibration. However, the noise of the traditional riveting and stamping die riveting method exceeds 95sbt.
3. The cold-rolled riveting technical rivet head makes pure rolling without dragging in the rivet. The roughness of the rivet after forming is only the rivet head, and the roughness of the rivet head is very easy to ensure. Therefore, the surface of the cold-rolled rivet is smooth and beautiful. Generosity cannot be analogized by other riveting methods.