1. The pull-through of the rivet is because the core pulling force of the blind rivet is too large, the diameter of the core cap is too small, and the material of the rivet body is soft, so the surface of the inner hole of the rivet is too lubricated.
2. The burr occurs because the diameter of the mandrel cap is too small; the material of the rivet body is too soft; the diameter of the workpiece drilling is too large; the size of the nozzle of the rivet gun is too large; the distance between the mandrel fracture and the mandrel head is too large, which exceeds the actual Riveting thickness.
3. The head of the pull rivet falls off because the diameter of the mandrel cap is too large; the rivet body is short and does not match the riveting thickness.
4. The reasons for the cracking of the riveting body are: the hardness of the riveting body is too high or not heat treated after annealing; the diameter of the mandrel cap is too large; the content of harmful impurities in the riveting body material is too high, or there are interlayers.
5. The loosening of the rivet after anchoring is because the core pulling force is too low; the workpiece drilling is too large; the hardness of the rivet body is too high; the rivet clamping force design (material selection) is improper.
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