1. Burrs: Burrs on the edge of the Punching parts

  2. Bending: Punching pressure overloaded lead to products Bending.

  3. Fault and Fissures: Non-uniform Load lead to the products fault and fissures.

  4. Scratching: Material or Treatment Scraching by Extenal force, lead to products Unqualified.

  5. Deformation: Non-uniform Load lead to products out of Shape.