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Straightening and crack arresting method for eliminating edge cracks during rolling of ultra-thin strip

A technology of edge cracks and ultra-thin strips, applied in metal rolling, contour control, etc., to achieve the effects of improving economic benefits, eliminating edge cracks, and strong driving effect

Inactive Publication Date: 2022-04-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the current situation that edge cracks are prone to occur in the processing of ultra-thin strips, and to provide a straightening and arresting method for eliminating edge cracks when rolling ultra-thin strips. , use the rolling process to straighten the edge cracks of the ultra-thin strip, effectively eliminate the edge crack defects in the ultra-thin strip rolling process, improve the yield of the ultra-thin strip, reduce production costs, and improve the economic benefits of the enterprise

Method used

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  • Straightening and crack arresting method for eliminating edge cracks during rolling of ultra-thin strip
  • Straightening and crack arresting method for eliminating edge cracks during rolling of ultra-thin strip
  • Straightening and crack arresting method for eliminating edge cracks during rolling of ultra-thin strip

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Effect test

Embodiment 1

[0035] Such as Figure 1-Figure 5 As shown, a kind of straightening and arresting method for eliminating edge cracks when rolling an ultra-thin strip in this embodiment includes:

[0036] S1. Rough rolling with large reduction: select industrial pure titanium with a thickness of 8mm and a width of 120mm. After 12 passes of cold rolling, the thickness of the rolled piece 200 is reduced to 0.15mm. During the rolling process, the lower roll used is 100mm The degree is 2 μm, and the crown of the upper roll 100 is 50 μm.

[0037] S2. Shape adjustment rolling with small reduction: After the strip threading is completed, a pre-compression force of 100kN is applied, and the initial tension is 15% of the yield stress of the metal material with the same thickness. The used roll 100 has a diameter of 90 mm and a roll surface width of 200 mm. After 2 passes of small reduction rolling, the reduction of each pass is 10%, and the metal plate is strip-rolled to a thickness of 0.08 mm.

[00...

Embodiment 2

[0042] A kind of straightening and arresting method for eliminating edge cracks when rolling an ultra-thin strip in this embodiment is basically the same as in Embodiment 1. More specifically, the oxygen-free copper metal with a thickness of 10 mm and a width of 140 mm is used in this embodiment. materials, the process is as follows:

[0043] S1. Rough rolling with large reduction: After 15 passes of cold rolling, the thickness of the rolled piece 200 is reduced to 0.12 mm. During the rolling process, the lower roll 100 used has a crown of 1 μm, and the upper roll 100 has a crown of 1 μm. 70 μm.

[0044] S2. Shape adjustment rolling with small reduction: After the strip threading is completed, a pre-compression force of 200kN is applied, and the initial tension is 20% of the yield stress of the metal material with the same thickness. The used roll 100 has a diameter of 300 mm and a roll surface width of 600 mm. After 4 passes of small reduction rolling, the reduction of each ...

Embodiment 3

[0047] A kind of straightening and arresting method for eliminating edge cracks when rolling an ultra-thin strip in this embodiment is basically the same as in Embodiment 1. More specifically, in this embodiment, a nickel or magnesium alloy with a thickness of 1mm and a width of 50mm is selected. The material is rolling piece 200, the process is as follows:

[0048] S1. Rough rolling with large reduction: After 5 passes of cold rolling, the thickness of the rolled piece 200 is reduced to 0.1 mm. During the rolling process, the lower roll 100 used has a crown of 0 μm, and the upper roll 100 has a crown of 0 μm. 40 μm.

[0049] S2. Shape adjustment rolling with small reduction: After the strip threading is completed, apply a pre-compression force of 50kN, and the initial tension is 10% of the yield stress of the metal material with the same thickness. The used roll 100 has a diameter of 120 mm and a roll surface width of 300 mm. After one pass of small reduction rolling, the pa...

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Abstract

The invention discloses a straightening and crack arresting method for eliminating edge cracks during rolling of an ultra-thin strip, and belongs to the field of metal material machining. The method is characterized in that the rolling process of the ultra-thin strip is divided into three stages, namely a large-rolling-reduction rough rolling process, a small-rolling-reduction strip shape regulating and controlling rolling process and an edge crack straightening and crack eliminating rolling process. In the edge crack straightening process, a multi-section variable-order curve convexity working roll is utilized, and an edge negative roll gap rolling method is combined, so that the edge crack of the ultra-thin strip can be gradually straightened in the rolling process under the action of three-way pressure stress. According to the method, the edge crack defect in the ultra-thin strip rolling process can be effectively removed, the edge cutting process is omitted, the stability of the rolling process can be greatly improved, the product yield is increased, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a straightening and arresting method for eliminating edge cracks when rolling an ultra-thin strip. Background technique [0002] Extremely thin metal strips are also called foils, and different countries and industries have different regulations on different types of foils. The maximum thickness of copper, steel, nickel and other metal foils stipulated in China is 0.05mm, while the maximum thickness of precision alloy foil stipulated in the United States is 0.127mm. [0003] Foils are widely used. For example, stainless steel and alloy foils are mainly used for parts in aerospace, precision instruments and other departments; iron-nickel soft magnetic alloy foils are generally used for making miniature high-frequency pulse transformer cores; titanium alloy foils are generally used It is used in heat-resistant tiles of space shuttles; Hastelloy stainless steel fo...

Claims

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Application Information

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IPC IPC(8): B21B1/40B21B37/28
Inventor 宋孟陈旭阳曹学云黄贞益刘相华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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