阅读说明：本技术 一种消除合金铝卷表面不平整的方法 (Method for eliminating unevenness of surface of alloy aluminum coil ) 是由 尚平 邓盛卫 李卫 于 2019-10-31 设计创作，主要内容包括：本发明涉及铝卷制备技术领域,具体公开了一种消除合金铝卷表面不平整的方法,将卷取后的铝卷放入铝卷退火炉中进行退火处理,所述退火温度为140～160℃,加热时间为6～10h,保温时间为18～24h。由于合金铝在轧制过程中也会进行多次回火或者退火处理,因此针对卷取的铝卷表面不平整的现象,行业内通常是通过调整轧制压下量、轧制油的成分、轧制油的喷淋系统和压力调整等措施来进行改善和消除,然而这些措施并没有有效的改善和消除铝卷表面不平整的现象；而本专利的技术方案通过将卷取后的铝卷重新放入退火炉中进行退火处理,能够有效的改善和消除铝卷表面的不平整现象。(The invention relates to the technical field of aluminum coil preparation, and particularly discloses a method for eliminating unevenness of the surface of an alloy aluminum coil. Because the alloy aluminum is also subjected to tempering or annealing treatment for multiple times in the rolling process, aiming at the phenomenon of uneven surface of a coiled aluminum coil, the phenomenon of uneven surface of the aluminum coil is improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures in the industry, however, the phenomenon of uneven surface of the aluminum coil is not effectively improved and eliminated by the measures; according to the technical scheme, the coiled aluminum coil is placed into the annealing furnace again for annealing treatment, so that the phenomenon of unevenness of the surface of the aluminum coil can be effectively improved and eliminated.)

1. A method for eliminating the surface unevenness of an alloy aluminum coil is characterized by comprising the following steps: and putting the coiled aluminum coil into an annealing furnace for annealing treatment, wherein the annealing temperature is 140-160 ℃, the heating time is 6-10 h, and the heat preservation time is 18-24 h.

2. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: and taking the aluminum coil out of the annealing furnace after the annealing is finished and cooling the aluminum coil in an air cooling mode.

3. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 2, wherein: the annealing temperature is 150-155 ℃.

4. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 2, wherein: and the heating time in the annealing treatment is 8-9 h.

5. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: and in the annealing treatment, the heat preservation time is 20-22 h.

6. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: the annealing furnace comprises a furnace body, a blow and wash fan, a negative pressure fan and a resistance heater, wherein an air outlet pipe is laid at the bottom of the furnace body, an air suction pipe is laid on the side wall of the furnace body, the resistance heater is communicated with the blow and wash fan and the air outlet pipe, and the negative pressure fan is communicated with the air suction pipe and the blow and wash fan.

7. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 6, wherein the method comprises the following steps: and an oil stain filtering component is arranged in the negative pressure fan.

8. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 6, wherein the method comprises the following steps: a plurality of air suction holes are formed in the side wall of the air suction pipe, and the opening of each air suction hole faces the inside of the furnace body.

9. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 6, wherein the method comprises the following steps: the air outlet pipe is provided with a plurality of air outlet holes, the air outlet pipes are arranged at intervals, a seat body for placing an aluminum foil roll is arranged between the air outlet pipes, and the air outlet pipes are provided with a plurality of air outlet holes.

10. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 9, wherein: the distance between the seat body and the bottom wall of the furnace body is greater than the distance between the air outlet pipe and the bottom wall of the furnace body, and each air outlet hole faces to the side wall of the furnace body.

Technical Field

The invention relates to the technical field of aluminum coil preparation, in particular to a method for eliminating unevenness of the surface of an alloy aluminum coil.

Background

The 5052 alloy is an AL-Mg alloy, magnesium is a main alloy element in the 5052 alloy, and is antirust aluminum which is widely applied, the alloy has high strength, particularly has high fatigue resistance and high plasticity and corrosion resistance, and is commonly used for preparing aluminum plates or aluminum foils.

Because the 5052 alloy material has high strength and the tensile strength of the alloy material is generally required to be 320-380 MPa, in the process of preparing an aluminum coil, particularly an aluminum foil of about 0.06mm, after the alloy material is rolled to the thickness of a finished product of 0.06mm by adopting a normal rolling mode, the whole surface of the material has an uneven phenomenon, the uneven phenomenon on the surface is more serious along with the reduction of the thickness of the finished product, and the uneven phenomenon on the surface is still not improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures.

Disclosure of Invention

The invention provides a method for eliminating the surface unevenness of an alloy aluminum coil, which aims to solve the problem that the surface unevenness of the aluminum coil cannot be solved by adjusting rolling reduction, rolling oil components, a spraying system of rolling oil and the like in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the method for eliminating the surface unevenness of the alloy aluminum coil comprises the step of placing the coiled aluminum coil into an annealing furnace for annealing treatment, wherein the annealing temperature is 140-160 ℃, the heating time is 6-10 hours, and the heat preservation time is 18-24 hours.

The technical principle and the effect of the technical scheme are as follows:

1. because the alloy aluminum is also subjected to tempering or annealing treatment for multiple times in the rolling process, aiming at the phenomenon of uneven surface of a coiled aluminum coil, the phenomenon of uneven surface of the aluminum coil is improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures in the industry, however, the phenomenon of uneven surface of the aluminum coil is not effectively improved and eliminated by the measures; the inventor finds that the rolled aluminum coil is placed into an annealing furnace again for annealing treatment in the groping process for solving the problem of the surface unevenness of the aluminum coil, and can effectively improve and eliminate the surface unevenness of the aluminum coil.

2. The annealing temperature in the scheme is lower to be 140-160 ℃, the aluminum coil can be prevented from softening in the annealing process at such a temperature, the heating time is 6-10 hours, namely, the heating rate in the annealing furnace is low, the problem that the aluminum coil is hot-rolled due to too high temperature is avoided, and the problem that the surface is concave and convex is aggravated, the heat preservation time in the scheme is 18-24 hours, and under the condition of long-time heat preservation, the internal tensile stress of the aluminum coil in the rolling and coiling processes can be effectively released, so that the concave and convex phenomenon on the surface of the aluminum coil is improved and eliminated.

And further, taking the aluminum coil out of the annealing furnace after the annealing is finished and cooling the aluminum coil in an air cooling mode.

Has the advantages that: compared with furnace cooling, the air cooling mode has the advantages that the air cooling time is short, the production time is shortened, and meanwhile, the strength of the aluminum coil can be improved.

Further, the annealing temperature is 150-155 ℃.

Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher at the annealing temperature.

Further, the heating time in the annealing treatment is 8-9 h.

Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher under the annealing heating time.

Further, in the annealing treatment, the heat preservation time is 20-22 h.

Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher under the annealing heat-preservation time.

Further, the annealing furnace comprises a furnace body, a blow and wash fan, a negative pressure fan and a resistance heater, an air outlet pipe is laid at the bottom of the furnace body, an air suction pipe is laid on the side wall of the furnace body, the resistance heater is communicated with the blow and wash fan and the air outlet pipe, and the negative pressure fan is communicated with the air suction pipe and the blow and wash fan.

Has the advantages that: therefore, after the negative pressure fan extracts hot air in the furnace body, the hot air is sent into the resistance heater through the purging fan, so that the energy consumption is reduced, the heating time required by the resistance heater is shortened, and the energy conservation is realized.

Further, an oil stain filtering component is arranged in the negative pressure fan.

Has the advantages that: because the surface of the aluminum coil still has certain oil stain after the aluminum coil is rolled and coiled, the oil stain filtering component is arranged in the negative pressure fan, and hot air containing the oil stain can be prevented from being sent into the annealing furnace again.

Furthermore, a plurality of air suction holes are formed in the side wall of the air suction pipe, and the opening of each air suction hole faces the inside of the furnace body.

Has the advantages that: the arrangement of the plurality of air suction holes can ensure that the negative pressure in the furnace body is relatively balanced, thereby being beneficial to the annealing of the aluminum coil.

Further, the air outlet pipe is provided with a plurality of air outlet holes, the air outlet pipes are arranged at intervals, a seat body for placing an aluminum foil roll is arranged between the air outlet pipes, and the air outlet pipes are provided with a plurality of air outlet holes.

Has the advantages that: the arrangement of the air outlet holes enables the temperature in the furnace body to rise relatively uniformly, and heat treatment of the aluminum coil is facilitated.

Furthermore, the distance between the seat body and the bottom wall of the furnace body is greater than the distance between the air outlet pipe and the bottom wall of the furnace body, and each air outlet hole faces the side wall of the furnace body.

Has the advantages that: set up like this and make and can not direct action impact the aluminium foil from exhaust hot-air current of exhaust vent and roll up, reduce hot-air current and act on the power that the aluminium foil was rolled up to prevent that the aluminium from rolling up the impact of heated air current aggravates the condition of surperficial unevenness.

Drawings

FIG. 1 is a cross-sectional view of an outlet duct in an annealing furnace used in an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: an air outlet pipe 10, a vertical shaft 11, a buffer plate 12 and an air outlet 13.