What factors affect the rebound when the section bending machine is working?
Noun explanation: The better the plasticity of the metal material, the stronger the deformation stability, the larger the uniform elongation, the smaller the bending radius. On the contrary, the plasticity is poor, the bending radius is large, and the material which is particularly brittle and fragile should be annealed or heated and bent before bending. The bending process is a process of plastic deformation after the material is elastically deformed. When plastically deformed, the outer layer is stretched, the inner layer is compressed, and the tension and compression cause stress and stress in the material, which causes a certain elastic deformation during the deformation of the material. When the external force is lost, the material will be certain. The degree of rebound.
So what factors affect the rebound when the profile bending machine is working:
1. The higher the yield strength of the material, the greater the rebound.
2. The ratio of the bending radius r to the material thickness t, the greater the value of r/t.
3. The larger the deformation area, the larger the rebound.
4. The friction between the surface of the material and the surface of the mold affects the stress state of each part of the billet. In most cases, the tensile stress in the bending deformation zone is increased, and the rebound is reduced.