Continuous roll-forming method of constant-thickness curved surface

Abstract

The invention provides a method of forming a constant-thickness three-dimensional curved surface part by a plate material, and belongs to the field of metal plastic processing. The method comprises the following steps: forming the constant-thickness three-dimensional curved surface part by performing two-pass rolling on the plate material by virtue of a convex (concave) working roll, wherein the first-pass rolling is completed by a pair of upper and lower working rolls with convex (or concave) roll outlines, a straight roll seam with a varied clearance in the transverse direction is formed between the upper and lower working rolls, and the plate material is changed into a variable-thickness pre-formed flat plate after being subjected to the first-pass rolling, the second-pass rolling is completed by a pair of upper and lower working rolls with concave and reverse roll outlines, an arc-shaped roll seam with an equal clearance in the transverse direction is formed between the upper and the lower working rolls, and the variable-thickness flat plate subjected to the first-pass pre-forming is changed into the constant-thickness three-dimensional curved surface part after being subjected to the second-pass rolling; controlling the longitudinal bending deformation of the finally formed three-dimensional curved surface by virtue of transverse distribution of the first-pass rolling roll seam clearance, and controlling the transverse bending deformation of the finally formed three-dimensional curved surface by virtue of the outline shape of the second-pass rolling arc-shaped roll seam.

Description

technical field [0001] The invention relates to a curved surface forming method, in particular to a continuous roll forming method for a curved surface of equal thickness, which belongs to the field of metal plastic processing and is suitable for low-cost and rapid forming of three-dimensional curved surface parts. Background technique [0002] In the manufacturing fields of aircraft, ships, high-speed trains, chemical containers, etc., as well as in modern architectural structures, urban sculptures, etc., the demand for three-dimensional curved surface parts is increasing day by day. The thickness of curved surface parts produced by traditional surface processing technologies such as mold forming, stretch forming, hydroforming, and spinning forming is usually uneven. The thickness is small where the deformation is large, and the thickness is small where the deformation is small. larger. The uneven thickness distribution of curved surface parts directly leads to the uneven ...

AI Technical Summary

Problems solved by technology

The uneven thickness distribution of curved surface parts directly leads to the uneven strength distribution. Small thickness parts are weak and prone to damage. Designing parts according to the strength of the smallest thickness part will inevitably lead to waste of materials and increase of part weight

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