Ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips

A technology of variable thickness, plate and strip, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., which can solve the problems of uneven rolling of variable thickness plate and strip, and achieve coordinated deformation, cost saving, and good weight reduction and the effect of bearing the load

Inactive Publication Date: 2018-05-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a method for preparing transversely variable-thickness plate and strip, which uses point symmetry to prepare transversely variable-thickness plate and strip, which can overcome the uneven and asymmetric deformation of variable-thickness plate and strip during rolling The generated defects such as waves, bends, and torsion can be used in the preparation of various metal materials with transversely variable thickness plates and strips

Method used

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  • Ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips
  • Ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips
  • Ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips

Examples

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Embodiment 1

[0045] The target product is a ladder-type transversely variable thickness plate strip, which is divided into 5 thickness zones in the width direction. The zone widths are all 13mm. Image 6It is a schematic diagram of the cross-sectional shape and size of each layer of raw materials in Example 1 of the present invention. As shown in the figure, the raw material is Q235 steel, and there are two layers in total. The shape and size of the upper layer and the lower layer are the same, the length is 90 mm, and the thickness in the width direction changes in a ladder shape. Divided into 5 thickness zones, the thickness of the 5 thickness zones from small to large h5, h4, h3, h2, h1 are 5mm, 7.5mm, 10mm, 12.5mm, 15mm respectively, and the width of each thickness zone is b1, b2, b3, b4 , b5 are both 12.6mm, and the total width B is 63mm (considering the total width is 2mm). Through the following steps, the target product is finally obtained:

[0046] The rolling mill selected in th...

Embodiment 2

[0059] The target product is a wedge-shaped strip with a width of 300mm, a thickness of 10mm at the thickest point, and a thickness of 2mm at the thinnest point. Figure 7 It is a schematic diagram of the cross-sectional shape and size of each layer of raw materials in Example 2 of the present invention. As shown in the figure, the raw material is pure copper with a Cu content of 99.99%. There are two layers of raw materials. The upper layer and the lower layer have the same shape and size, and the shape is wedge-shaped. is 800mm, the width B is 300mm, the thickness h1 at the thickest part is 25mm, and the thickness h2 at the thinnest part is 5mm. Through the following steps, the target product is finally obtained.

[0060] The rolling mill selected in the embodiment of the present invention is a two-roll reversing rolling mill, and the rolling speed adopted is 0.2 m / s.

[0061] The preparation method of the lateral variable thickness plate and strip in this embodiment, the s...

Embodiment 3

[0073] The target product is a transversely variable-thickness plate strip consisting of three parts: the thick zone, the transition zone and the thin zone. The width is 40mm. Figure 8 It is a schematic diagram of the cross-sectional shape and size of each layer of raw materials in Example 3 of the present invention. As shown in the figure, the raw material is 45# steel, and there are three layers of raw materials. The upper layer and the lower layer have the same shape and size. Three parts of the thin zone, the length is 400mm, the thickness of the thick zone h1 is 20mm, the thickness of the thin zone h4 is 10mm, the width of the thick zone b1 is 39.25mm, the width of the thin zone b3 is 78.5mm, the width of the transition zone b2 is 39.25mm, and the total width is B It is 157mm (considering the total width is 3mm); the thickness h2 of the thin area on both sides of the middle layer is 10mm, the maximum thickness h3 of the thicker area in the middle is 20mm, the widths of t...

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Abstract

The invention belongs to the technical field of metal material deep processing and particularly relates to a ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips. According to the method, the point symmetry is utilized for preparing the transverse variable thickness plate strips, the defects of waves, curve, torsion and the like caused by uneven andasymmetrical deformation in the variable thickness plate strip rolling process can be overcome, and the method can be used for preparing the various metal material transverse variable thickness platestrips. The method has the beneficial effects that adaptability to raw material texture and shape size is high, the flexibility of thickness changing of products is improved remarkably, flat rollerscan be used for carrying out rolling, the expense generated by using milling roller types is saved, the defects of waves, curve, torsion and the like caused by uneven deformation of variable thicknessrolling can be avoided, whether transition areas between thick areas and thin areas exist on the transverse variable thickness plate strips or not can be selected and designed, the shape and the position of the transition areas can selected and designed, and the best weight reducing and load bearing effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of deep processing of metal materials, and in particular relates to a stack rolling method for preparing laterally variable-thickness plates and strips by using point symmetry. Background technique [0002] 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 forming process of the material has adverse effects; the variable thickness plate and strip produced by the rolling method overcomes the above shortcomings, and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/04B21B47/00
CPCB21B1/38B21B47/00B21B47/04B21B2001/383B21B2001/386B21B2261/046
Inventor 刘相华洪羽晨张彬祁俊龙支颖
Owner NORTHEASTERN UNIV
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