What is the reason for the broken core of the rivet?
1. The tension of the rivet mandrel is unstable, the breaking point force is too close to the tension of the mandrel itself, or the heat treatment is not done well, resulting in the mandrel becoming brittle. 2. The core of the rivet has been injured before the rivet is pulled; 3. The air pressure of the rivet gun used for pulling the rivet has not reached, and the claws are worn, which has caused damage once, and will break directly from the injured part when the second time is carried out; 4. The rivet claws used for pulling rivets are not adjusted well, and they are not on the same plane, which has the effect of shearing the mandrel. steady-ind.com