Three-rollRolling mill cracks are a common occurrence, and severe ones can affect the later performance. What are the main causes of this issue? Today, I've compiled a few points for you to check out.
1. Open-type crack (M-type): Under the action of rolling stresses parallel to the crack surface and perpendicular to the crack tip line in a three-roll bending machine, a crack is formed by relative sliding along the crack surface, i.e., the direction of the applied rolling stresses. The displacement components along the direction in the upper and lower surface points on the crack surface are discontinuous.
2. Opening Cracks (Type I): A type of crack formed when the crack surface of a three-roll bending machine experiences tensile displacement due to the tensile stress perpendicular to the crack surface, with the displacement being orthogonal to the crack surface, i.e., along the tensile stress direction. The displacement components of the upper and lower surface points on the crack surface along the J direction are discontinuous.
3. Sliding Crack (Type N): Under the action of rolling stresses perpendicular to the crack face and parallel to the crack tip, a crack forms due to relative sliding along the crack face, i.e., along the direction of the applied rolling stress, on the crack face of the three-roller bending machine. The displacement components of the soil surface points and lower surface points along the x-direction on the crack face L are "discontinuous."
That concludes our introduction to the causes of cracking in coil slitting machines. Should you have any further questions, feel free to contact us.
