A preparation method for quickly improving the glossiness of mirror-finished aluminum alloy strip

Abstract

The invention relates to a preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip. The aluminum alloy strip used in the method is subjected to a cold-rolling homogenization treatment. The method comprises the following steps: S1: before the cold-rolling mirror-finishing pass of the aluminum alloy strip, the roughness of an entrance color-adjusting roller is set to 0.01-0.30 μm; S2: 2) during the cold-rolling mirror-finishing pass of the aluminum alloy strip, the lower tangent position of an upper roller of the entrance color-adjusting roller is 0-10 mm lower than the roller surface height of a lower roller, and the linear speed of the entrance color-adjusting roller is 10-100 m / min greater than the linear speed of a working roller of a rolling mill; S3: during the cold-rolling mirror-finishing pass of the aluminum alloy strip, the speed of the working roller of the rolling mill is ≤200 m / min. By optimizing the surface roughness and the pressing depth of the cold-rolling entrance color-adjusting roller, the mirror-finished aluminum alloy strip is rapidly prepared and a higher surface glossiness is obtained, thereby increasing the material preparation production efficiency and achieving a good mirror-finished effect on the finished product.

Description

Technical Field

[0001] The invention relates to a preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip. Background Art

[0002] Mirror aluminum is aluminum that has been treated through various methods, such as rolling and polishing, to achieve a mirror-like finish. It is widely used in lighting reflectors and fixtures, solar thermal reflective materials, interior and exterior architectural decoration, appliance panels, electronic product casings, furniture and kitchenware, automotive interior and exterior trim, signage, logos, luggage, and jewelry boxes.

[0003] Due to limitations in production processes and the mirror finish, domestic mirror-finished aluminum alloy strip is generally imported, primarily from Germany and Italy. Mirror-finished aluminum is produced primarily through rolling and calendering, and surface grinding and polishing. During rolling and calendering, the cold rolling mill's work roll surfaces are ground to a mirror finish, with a roughness generally controlled between 0.01 and 0.02 μm. To achieve the mirror finish, the cold rolling mill's work rolls typically use a low-speed rolling scheme, with mirror-finishing pass speeds typically not exceeding 90 m / min, resulting in low production efficiency. Another method involves grinding and polishing the surface of ordinary aluminum alloy strip using extremely fine emery cloth and a high-speed rotating grinder, typically to a grinding depth of 10 to 100 μm. Although this polishing method can also achieve the purpose of improving the mirror effect, due to the deep polishing depth, a layer of the aluminum alloy surface is worn away, which significantly reduces the weight of the aluminum material. In addition, the aluminum chips generated during the polishing process are mixed with the polishing fluid to form hazardous waste similar to "sludge", which is difficult to handle later and is not conducive to environmental protection.

[0004] For mirror-finish aluminum alloy strip produced by rolling and calendering, the roughness of the cold rolling mill work rolls or backup rolls is typically controlled, with the work roll roughness typically controlled to <0.015µm. The inlet toner roll is generally not a key control point during the rolling of mirror-finish aluminum alloy strip.

[0005] The color-adjusting roller is used to adjust the color difference of the strip surface. However, due to the actual production process and product quality requirements, the color-adjusting roller is mainly used to prevent large amounts of rolling oil from the inlet strip from splashing into the inlet tensioning device. Since the original design used a limited positioning method, the positioning was very inaccurate and was manually operated. It is very easy for rolling oil to enter the inlet tensioning device due to improper or untimely adjustment, causing the tensioning device roller system and the strip to slip and scratch. Therefore, its roughness is generally controlled to be above 0.3μm. To ensure normal rolling, the control of the cold rolling mill's inlet color-adjusting roller does not have special requirements. According to the conventional surface control requirements of aluminum alloy strip, the roughness is generally less than 1.0μm. This is to avoid the phenomenon of low roughness and the occurrence of inlet color-adjusting roller slippage. The present invention combines parameters such as the height of the color-adjusting roller, the rolling speed, and the speed difference control to avoid this problem, and can achieve normal rolling output.

[0006] The depth of the entrance tinting roller is generally adjusted according to the thickness of the rolled aluminum alloy strip. The cold rolling entrance tinting roller is generally used to adjust the amount of oil on the cold rolling entrance surface, that is, to ensure that the rolling oil at the cold rolling entrance is blocked by the entrance tinting roller to prevent the rolling oil from overflowing toward the cold rolling uncoiler. At the same time, it allows for initial wetting of the strip to prevent aluminum powder from being pressed in. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a preparation method for quickly improving the glossiness of a mirror-finished aluminum alloy strip, which not only has high production efficiency but also can obtain a higher surface glossiness.

[0008] In order to solve the above technical problems, the technical solution of the present invention is: a preparation method for quickly improving the glossiness of a mirror-finished aluminum alloy strip, comprising the following steps:

[0009] 1) Before the cold rolling mirror rolling pass of the aluminum alloy strip, the roughness of the inlet toner roller is controlled at 0.01~0.30um.

[0010] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 0~10mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 10~100m / min higher than the linear speed of the rolling mill working roller.

[0011] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is ≤200m / min.

[0012] The mirror-finished aluminum alloy strip produced using this method achieves significantly higher rolling speeds than conventional methods, while also improving its gloss by 50-100 Gu. This method meets subsequent use requirements for the mirror-finished aluminum alloy strip, offering advantages such as high surface gloss and high production efficiency.

[0013] To ensure rapid improvement in the gloss of mirror-finished aluminum alloy strip, in step 1), the roughness of the inlet tinting roller must be controlled between 0.01 and 0.30 μm. This primarily reduces the surface roughness of the aluminum alloy strip before it enters the rolling mill's work roll gap, achieving a preliminary polishing effect. Furthermore, as the aluminum alloy strip enters the rolling mill's work roll gap, it achieves a more uniform and finely polished surface, significantly reducing uneven surface polishing during the rolling process and further improving surface gloss. A tinting roller roughness below 0.01 μm can easily cause slippage during rolling, preventing production. A tinting roller roughness above 0.30 μm prevents this initial polishing effect from being apparent.

[0014] In step 2), the lower tangent line of the upper roller of the inlet tinting roller is positioned 0-10 mm lower than the surface height of the lower rolling roller, and the linear speed of the inlet tinting roller is 10-100 m / min higher than the linear speed of the mill's work rolls. The upper roller position of the inlet tinting roller must be kept lower than the surface height of the lower rolling roll to ensure a preliminary polishing effect and achieve the purpose of this method. Exceeding this range may result in loss of performance or increased risk of slippage and scratching during the rolling process, adversely affecting the surface quality of the aluminum alloy. The linear speed should be higher than the linear speed of the mill's work rolls to further enhance the preliminary polishing effect. A speed within 10 m / min or less of the work roll linear speed will not achieve the preliminary polishing effect. However, a speed exceeding 100 m / min is too high, resulting in a significant difference in rolling speed with the work rolls. This can lead to scratching and wear between the tinting roller and the aluminum alloy strip during rolling, further compromising the surface quality of the aluminum alloy strip.

[0015] In step 3), through the optimization of the first two steps, the rolling speed of the rolling mill work roll can be increased to within 200m / min, which is significantly higher than the conventional speed of within 90m / min. However, it still cannot exceed 200m / min. This is mainly because when the working speed is too fast, the rolling work roll has no obvious effect on improving the mirror effect of the aluminum alloy, which causes the functions of the first two steps to fail.

[0016] Only by strictly following the above steps and control methods can we ensure that the surface glossiness of the mirror aluminum alloy strip is further improved while further increasing the rolling speed, and improve production efficiency while ensuring the mirror effect.

[0017] According to the control means and related parameters of this patent, the mirror aluminum alloy material can be prepared efficiently, quickly and with high quality, thereby improving production efficiency, reducing production costs and ensuring that gloss requirements are met.

[0018] Compared with the existing technology, the present invention has the following beneficial effects: by optimizing the surface roughness and pressing depth of the cold rolling entrance color-adjusting roller, the rapid preparation of mirror-finished aluminum alloy strips can be achieved, and higher surface gloss can be obtained, so that the material preparation production efficiency is high and the finished product has a good mirror effect.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0021] In the figure: 1-rolling mill working roll, 2-rolling upper roll, 3-rolling lower roll, 4-aluminum alloy strip, 5-entry color-adjusting roll, 6-entry color-adjusting roll upper roll, 7-entry color-adjusting roll lower roll. DETAILED DESCRIPTION

[0022] To make the above features and advantages of the present invention more clearly understood, five embodiments are given below with reference to the accompanying drawings for detailed description.

[0023] Example 1: Figure 1 As shown, a preparation method for quickly improving the glossiness of a mirror-finished aluminum alloy strip comprises the following steps:

[0024] 1) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.15um.

[0025] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 5 mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 15 m / min higher than the linear speed of the mill working roller.

[0026] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is 120m / min.

[0027] The transverse glossiness of the finished product is A.

[0028] Comparative Example 2:

[0029] A preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip comprises the following steps:

[0030] 1) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.8um.

[0031] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 5 mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 15 m / min higher than the linear speed of the mill working roller.

[0032] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is 120m / min.

[0033] The transverse glossiness of the finished product is B.

[0034] Comparative Example 3:

[0035] A preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, characterized by comprising the following steps:

[0036] 1) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.15um.

[0037] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is at the same height as the roller surface of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 15m / min higher than the linear speed of the working roller of the rolling mill.

[0038] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is 120m / min.

[0039] The transverse glossiness of the finished product is C.

[0040] Comparative Example 4:

[0041] A preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, characterized by comprising the following steps:

[0042] 1) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.15um.

[0043] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 5 mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 15 m / min higher than the linear speed of the mill working roller.

[0044] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the working roll of the rolling mill is 320m / min.

[0045] The transverse glossiness of the finished product is D.

[0046] Comparative Example 5:

[0047] A preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, characterized by comprising the following steps:

[0048] 1) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.7um.

[0049] 2) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 5 mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 15 m / min higher than the linear speed of the mill working roller.

[0050] 3) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is 80m / min.

[0051] The transverse glossiness of the finished product is F.

[0052] Comparative Example 6:

[0053] A preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, characterized by comprising the following steps:

[0054] 4) Before the cold rolling mirror rolling pass of 1050 aluminum alloy strip, the roughness of its inlet toner roller is controlled at 0.15um.

[0055] 5) During the cold mirror rolling pass of the aluminum alloy strip, the lower tangent position of the upper roller of the entrance color-adjusting roller is 5 mm lower than the roller surface height of the rolling lower roller, and the linear speed of the entrance color-adjusting roller is 200 m / min higher than the linear speed of the rolling mill working roller.

[0056] 6) During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill working roll is 120m / min.

[0057] The transverse glossiness of the finished product is G.

[0058] The surface glossiness of the above different embodiments is as follows:

[0059]

[0060] In summary, compared with other embodiments, this method can achieve higher surface glossiness and a good mirror effect of the finished product.

[0061] The present invention is not limited to the above-described preferred embodiment. Based on the teachings of this invention, anyone can devise various other methods for rapidly enhancing the gloss of mirror-finished aluminum alloy strips. All equivalent variations and modifications made within the scope of the present invention are intended to fall within the scope of this invention.

Claims

1. A method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, characterized by: The aluminum alloy strip used in the method is subjected to a cold rolling homogenization treatment, and the method comprises the following steps: S1: Before the cold mirror rolling pass of the aluminum alloy strip, the roughness of the inlet toning roller is set to 0.01~0.30μm; S2: During the cold rolling mirror rolling pass of aluminum alloy strip, the lower tangent line position of the upper roller of the inlet tinting roller is 0~10mm lower than the roller surface height of the rolling lower roller, and the linear speed of the inlet tinting roller is 10~100m / min higher than the linear speed of the mill work roller; S3: During the cold mirror rolling pass of the aluminum alloy strip, the speed of the rolling mill work roll is ≤200m / min; The invention comprises a preparation device for rapidly improving the glossiness of a mirror-finished aluminum alloy strip, the device comprising a rolling mill working roll, the rolling mill working roll comprising an upper rolling roll and a lower rolling roll, and the aluminum alloy strip passes between the upper rolling roll and the lower rolling roll.

2. The method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip according to claim 1, characterized in that: The inlet color adjusting roller includes an upper inlet color adjusting roller and two lower inlet color adjusting rollers located below the upper inlet color adjusting roller. The tangent position of the top end of the lower inlet color adjusting roller close to the discharge end is at the same level as the lower tangent position of the upper inlet color adjusting roller, and the tangent position of the top end of the lower inlet color adjusting roller close to the feed end is lower than the lower tangent position of the upper inlet color adjusting roller.

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