Rolling method for preventing transverse variable-thickness plate strips from generating defects

A technology of changing thickness and sheet and strip, applied in the direction of metal rolling, etc., to achieve the effect of enhancing coordination, diversifying cross-sectional shapes, and enhancing production limits

Active Publication Date: 2019-01-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the rolling process of the existing transversely variable-thickness plate and strip, the present invention provides a rolling method for preventing defects of the transversely variable-thickness plate and strip. According to the shape required by the target plate, the raw materials are combined in advance Constitute a blank with up-down symmetry or left-right symmetry, and then roll it, and use symmetry to overcome defects such as waves, bending, and torsion caused by uneven and asymmetric deformation of the plate and strip during rolling

Method used

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  • Rolling method for preventing transverse variable-thickness plate strips from generating defects
  • Rolling method for preventing transverse variable-thickness plate strips from generating defects
  • Rolling method for preventing transverse variable-thickness plate strips from generating defects

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Process such as Figure 8 shown;

[0040] Prepare metal plate (material is 1060 aluminum), and described metal plate raw material is flat raw material;

[0041] The metal plates are welded to form left-right symmetrical raw materials to be rolled. The left-right symmetrical raw materials to be rolled are composed of three metal plates through welding. Among the three flat raw materials, there are one thin plate and two thick plates; each metal The bottom surface of the plate is on the same horizontal plane, and the two sides of the thin plate are respectively connected with a thick plate, and the thickness and width of the two thick plates are the same, such as figure 1 As shown, the left-right symmetrical raw material to be rolled is composed of a thin area in the middle and thick areas on both sides. 5mm, total width 79mm (width 80mm after rolling and stretching), width of thin zone 39.8mm (width 40mm after rolling and stretching), total length of each zone 150mm; ...

Embodiment 2

[0044] Method is with embodiment 1, and difference is:

[0045](1) The material of the metal plate is Q235 steel, which is a flat plate, which is welded into the left-right symmetrical blank of the same embodiment 1 earlier, as a transversely variable thickness plate, consisting of thick areas on both sides and a thin area in the middle; The blanks are stacked, and the upper and lower symmetrical raw materials to be rolled are formed by welding. The upper and lower metal plate raw materials are separated by graphite paper. The structure is as follows: figure 2 As shown; the up and down symmetrical raw material to be rolled is composed of a thin area in the middle and thick areas on both sides, the top surface of the thin area and the top surface of the thick area are in different horizontal planes, and the bottom surface of the thin area and the bottom surface of the thick area are in the Different levels; the thickness of the thin zone is 10mm, the thickness of the thick zon...

Embodiment 3

[0048] Method is with embodiment 1, and difference is:

[0049] Prepare a metal plate, the metal plate is a horizontally variable thickness plate, which is asymmetrical and consists of a thick plate part and a thin plate part to form an integrated structure; the metal plate is made by forging;

[0050] Two metal plates with the same shape are welded to form a left-right symmetrical raw material to be rolled, and the thin plate parts of the two horizontal thickness difference flat raw materials are connected together, the structure is as follows image 3 shown.

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Abstract

The invention relates to a rolling method for preventing transverse variable-thickness plate strips from generating defects. The rolling method comprises the following steps that (1) a metal sheet ismade into a to-be-rolled raw material which is symmetrical left and right or up and down; (2) a rolling mill with a special-shaped roller is adopted for rolling the to-be-rolled raw material to enablethe to-be-rolled raw material to deform to be in the needed thickness; and (3) a transverse variable-thickness rolled plate is subjected to a finishing process or a cutting and finishing process to produce a transverse variable-thickness plate strip product. The method greatly reduces the unevenness of workpiece deformation, and can overcome the defects of waves, bending, torsion and the like caused by asymmetric deformation of the plate strips in the rolling process; and the adaptability to the material of the raw material is strong, the thickness of the finished product is flexibly changed,and the cross-sectional shape is more diverse.

Description

technical field [0001] The invention belongs to the technical field of deep processing of metal materials, and in particular relates to a rolling method for preventing defects of transversely variable thickness plates and strips. Background technique [0002] Under the general trend of energy saving and emission reduction in today's society, the application of variable thickness plates and strips has been introduced in the industry. Variable-thickness plate and strip has the advantages of saving metal, reducing component quality, and improving product bearing capacity. It is widely used in the automotive industry, ship and bridge industry, aerospace, and electronic equipment. [0003] The variable thickness plate and strip can be produced by rolling, welding and other technologies. The variable thickness plate and strip produced by the welding method has a weld between the thick area and the thin area, and there is a sudden change in thickness between the two areas. The for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21C37/02
CPCB21B1/38B21B2001/386B21B2201/06B21C37/02
Inventor 刘相华洪羽晨
Owner NORTHEASTERN UNIV
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