- Jan 20, 2021-

Bending - the sheet metal is first subjected to elastic deformation and then to plastic deformation under the pressure of the upper die or the lower die of the bending machine, At the beginning of plastic bending, the sheet metal is free bending. With the pressure of the upper die or lower die on the sheet metal, the sheet metal and the inner surface of the V-groove of the lower die are gradually close, and the curvature radius and bending arm are gradually smaller. Continue to press until the end of the stroke, so that the upper and lower die and the sheet metal are close to each other at three points. At this time, a V-bending is completed, which is commonly known as bending.