Crosswise thickness-variable strip and preparation method thereof

A technology of variable thickness, plate and strip, applied in the direction of sheet/plate, metal rolling, building elements, etc., can solve the problem of little research on transverse variable thickness plate and strip rolling technology, so as to avoid low production efficiency, The effect of saving metal materials and reducing fuel consumption

Active Publication Date: 2014-05-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Longitudinal variable-thickness plate and strip have been mass-produced; but the

Method used

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  • Crosswise thickness-variable strip and preparation method thereof
  • Crosswise thickness-variable strip and preparation method thereof
  • Crosswise thickness-variable strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The cross-section of the strip to be rolled is as Figure 6 as shown in A6;

[0039] Four kinds of first rolling mills are adopted; the circumference of the cylinder of the upper work roll of the first kind of first rolling mill is provided with a protrusion, and the circumference of the cylinder of the lower work roll is provided with a groove; There is a protrusion and a groove on the circumference of the cylinder of the upper work roll, and a protrusion and a groove are provided on the circumference of the cylinder of the lower work roll; the cylinder of the upper work roll of the third type of first rolling mill There is one bulge and two grooves on the circumference, two bulges and one groove on the circumference of the cylinder of the lower working roll; There are two protrusions and a groove, and there is a protrusion and two grooves on the circumference of the cylindrical surface of the lower work roll; the roll gaps of the four first rolling mills respectively...

Embodiment 2

[0056] The structure of the upper and lower work rolls of the first rolling mill adopted is the same as the first rolling mill of the first kind in embodiment 1; the roll gap forms a U-shaped curve structure; the plate and strip to be rolled is carried out transition rolling with the first rolling mill, and Form a middle plate strip with a special-shaped structure in the middle, and the special-shaped structure is a U-shaped curve structure;

[0057] Six kinds of second rolling mills are used respectively, and the roll gap cross-section of the work roll gap structure is horizontal axis symmetric type; figure 1 As shown in A1, B1, C1, D1, E1 and F1; the middle plate strip with special-shaped structure in the middle is formed and rolled by the second rolling mill to make six kinds of transversely variable thickness plates and strips, and the structures are as follows figure 1 shown in A1, B1, C1, D1, E1 and F1;

[0058] Carry out band tension rolling in rolling process, method ...

Embodiment 3

[0066] The structure of the upper and lower work rolls of the first rolling mill adopted is the same as that of the second first rolling mill of embodiment 1, and the roll gap constitutes a horizontally placed S-shaped curve structure; system, making the middle plate strip with a special-shaped structure in the middle, and the special-shaped structure is a horizontally placed S-shaped curve structure;

[0067] Six kinds of second rolling mills are used respectively, and the roll gap cross-section of the roll gap structure is vertical axis symmetric type; figure 2 Shown in A2, B2, C2, D2, E2 and F2 of A2, B2, C2, D2, E2 and F2; the middle plate and strip with special-shaped structure in the middle are formed and rolled by the second rolling mill to make six kinds of transversely variable thickness plates and strips, and the structures are as follows figure 2 shown in A2, B2, C2, D2, E2 and F2;

[0068] Carry out band tension rolling in rolling process, method is with embodim...

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Abstract

The invention relates to a crosswise thickness-variable strip and a preparation method thereof. The crosswise thickness-variable strip is composed of at least two equal thickness areas and at least one transition area, at least one equal thickness area and at least one wedge-shaped area, one or more than two wedge-shaped areas, or more than two curved thickness-variable areas. The preparation method comprises the following steps: (1) performing transition rolling, wherein at least one bulge and at least one groove are arranged on both of the two working rolls of a rolling machine or at least one bulge and at least one groove are respectively arranged on the two working rolls of the rolling machine; 2) performing forming rolling. According to the preparation method provided by the invention, the purposes of saving metal materials and reducing structure weight are achieved. According to the method for producing the crosswise thickness-variable strip by utilizing a rolling method, the defects of low production efficiency, higher production cost, and the like, of the production of the crosswise thickness-variable strip according to a welding method are avoided.

Description

technical field [0001] The invention belongs to the technical field of rolling, and in particular relates to a transversely variable-thickness plate strip and a preparation method thereof. Background technique [0002] Variable-thickness plate and strip are used in automobile manufacturing, shipbuilding, bridges and other industries, and have the advantages of saving material and weight, reducing weld seams, reducing costs, and improving efficiency. The production methods of variable thickness plates include laser tailor welding, rolling and so on; in recent years, the production of variable thickness steel plates by rolling method has been paid attention to because of its good quality, low cost and high efficiency. [0003] The variable thickness plate and strip can be divided into longitudinal variable thickness plate, transverse variable thickness plate and three-dimensional variable thickness plate and strip. There are many automotive lightweight parts that can be made ...

Claims

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Application Information

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IPC IPC(8): F16S1/12B21B1/22
CPCB21D35/006B21D1/02B21D25/00
Inventor 刘相华支颖
Owner NORTHEASTERN UNIV
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