Equal-thickness in-plane continuous plate strip bending method

Abstract

An equal-thickness in-plane continuous plate strip bending method comprises the following steps: putting a plate strip into a roll gap determined between roll surfaces of two rolls; and positioning the lower surface of the plate strip at a point A, wherein the two rolls rotate synchronously face to face; the rotation speeds omega of the rolls are 2-10rad / s; at the beginning of forming, the plate strip has plastic deformation; since the linear velocities of the roll surfaces of the rolls have different distributions, the flow velocities of metal particles in the width direction of the plate strip in a deformed zone are in monotonous and uneven distribution; because of the distribution difference of the metal flow velocities, monotonous and uneven elongation deformation is generated in the length direction of the plate strip in the deformed zone; and due to coordinative development of the uneven elongation deformation, the plate strip develops in a direction forming a ring so as to be formed as an equal-thickness in-plane bent annular component. By the equal-thickness in-plane continuous plate strip bending method, during plastic bending, cracks in the outer zone of the bent component and wrinkles in the inner zone of the bent component caused by tension in the outer zone of the plate strip material and pressure in the inner zone of the plate strip material can be effectively avoided; and in the rolling process, the plate strip material is subject to work hardening, so that the mechanical properties of the plate strip material are improved.

Description

Technical field [0001] The invention relates to the field of plastic processing, and is a method for in-plane bending and forming of continuous plates and strips with equal thickness. Background technique [0002] Strip in-plane bending technology has a wide range of applications in plastic processing fields such as lightweight flange products, profile bending parts, and ring parts. During the forming process, the material presents a three-dimensional compressive stress state in the deformation zone, which is conducive to the plasticity of the metal material, can fully tap the forming potential of the material, and the forming limit of the material is greatly improved. At present, the traditional plastic bending method and blanking method are used for the manufacture of in-plane bending parts of the strip. The stress state of the outer zone of plastic bending and the inner zone of the inner zone is easy to cause the outer zone of the bending part to crack and the inner zone to w...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of the existing technology in the prior art, such as the defects of forming rings with equal thickness in-plane bending, the low utilization rate of materials, and the reduction of material properties during forming, the present invention proposes a method for bending in-plane equal thickness of continuous strips

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