Semi-hollow punch rivetingPlay Video
Punch riveting with semi-hollow rivets
Semi-hollow rivets are similar to solid punch rivets, except they have a partial hole (opposite the head) at the tip. The purpose of this hole is to reduce the amount of force needed for application by rolling the tubular portion outward. The force needed to apply a semi-hollow rivet is about 1/4 of the amount needed to apply a solid rivet.
The process is similar: the metal-layers are placed between holder and the die. With the motion of the punch the rivet cuts through the first layer. Due to the shape of the die and the rivet, the rivet spreads into the next layer, which is not cut or punched.
Application of rivet
Deformation of rivet and joined parts
The setting of semi-hollow rivets requires access to both sides of a structure. The major difference between punch-riveting and the common riveting is, that it doesn't require a hole being drilled or punched in advance. Punch-riveting means that the rivets punches the hole by itself so the joining process becomes easier and faster.
For more information on our semi-tubular rivets, contact TOX® PRESSOTECHNIK today!
Have a look: this system consists of a feeding- and placing unit, the tong, press head and controlling and monitoring devices.