Bending - Under the pressure of the upper or lower die of the bending machine, the metal sheet first undergoes elastic deformation and then enters plastic deformation.
At the beginning of plastic bending, the sheet is free to bend.
The lower die exerts pressure on the sheet material, and the sheet material and the inner surface of the V-shaped groove of the lower die gradually close together, and at the same time, the radius of curvature and the bending force arm gradually become smaller, and the pressure continues until the end of the stroke, so that the upper and lower die and the plate are in contact with each other at three points.
Tight and full contact, a V-shaped bending is completed at this time, which is commonly known as bending
