Mechanical principle of cold drawn tube

- Jun 10, 2020-

During cold drawing, the steel pipe undergoes plastic deformation through a die of a certain shape and size under the action of force. The drawing methods in production can be roughly divided into three types: reduced-diameter extubation, reduced outer-wall extubation and reduced inner-wall extubation. During cold drawing, the steel pipe under the action of pull-out force, positive pressure and friction force, corresponding Most of the deformations pass through three stages: diameter reduction, wall reduction and sizing, and the corresponding stresses are generated inside the deformation zone, in which the axial stress is tensile stress and the radial and circumferential stress is compressive. The state of compressive stress in two directions is the basic mechanical characteristic of the deformation process of the cold drawn tube. A