High-strength aluminum alloy sheet hot rolling line having sheet shape control function

Abstract

The invention relates to the field of nonferrous metal pressure machining machinery, in particular to a high-strength aluminum alloy sheet hot rolling line having a sheet shape control function. The high-strength aluminum alloy sheet hot rolling line comprises a rolling mill, a feeding roller way and a discharging roller way. The feeding roller way and the discharging roller way are distributed at the two sides of the rolling mill respectively. Front hydraulic shears, a front roller way heating furnace and a front stretching leveler are sequentially arranged between the feeding roller way and the rolling mill. Rear hydraulic shears, a rear roller way heating furnace and a rear stretching leveler are sequentially arranged between the discharging roller way and the rolling mill. According to the high-strength aluminum alloy sheet hot rolling line, a block-type method is adopted, the thickness of a high-strength aluminum alloy sheet billet can be rolled from 10-60 mm to 0.75-6 mm rapidly through one-time heating, the obtained sheet is flat and straight in shape, the surface of the sheet is smooth and clean, and both equipment cost and process cost are low

Description

technical field [0001] The invention relates to the field of pressure processing of non-ferrous metals, in particular to a high-strength aluminum alloy sheet hot-rolling train with the function of plate type control. Background technique [0002] Due to the influence of factors such as high strength, severe plastic strengthening, and good thermal conductivity of high-strength aluminum alloys, rolling will gradually become difficult when hot-rolled below 10mm, and the difficulty will become greater after the thickness is 4mm, especially when the thickness It is more difficult to realize rolling when it is less than 2mm. Hot rolling not only dissipates heat quickly, but also causes deformation strengthening due to relatively large deformation, and cold rolling deformation strengthening is severe; if coil rolling is adopted, not only the system power is large, but also the system It is quite large and complex, and all conventional hot rolling mills in China cannot complete the ...

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Problems solved by technology

[0002] Due to the influence of factors such as high strength, severe plastic strengthening, and good thermal conductivity of high-strength aluminum alloys, rolling will gradually become difficult when hot-rolled below 10mm, and the difficulty will become greater after the thickness is 4mm, especially when the thickness It is more difficult to realize rolling when it is less than 2mm. Hot rolling not only dissipates heat quickly, but also causes deformation strengthening due to relatively large deformation, and cold rolling deformation strengthening is severe; if coil rolling is adopted, not only the system power is large, but also the system It is quite large and complex, and all conventional hot rolling mills in China cannot complete the task of rapid thinning

[0003] At present, there are only a few manufacturers in my country that can hot-roll high-strength aluminum alloys represented by 7XXX series to about 10mm at one time, such as Southwest Aluminum, Northeast Light Alloy, and Nannan Aluminum. Finally, the following major problems are usually encountered: a. The heat dissipation speed becomes faster and faster as the thickness decreases, and it is difficult to roll thinner; b. The plate shape becomes more and more difficult to control as the thickness decreases, especially when the thickness is less than 2mm; c. Foreign first-class high-strength aluminum alloy sheet rolling mills are expensive; d. The smaller the thickness, the greater the production cost

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