CN111809127B - Preparation method of aluminum alloy foil for aluminum diaphragm of loudspeaker - Google Patents
Preparation method of aluminum alloy foil for aluminum diaphragm of loudspeaker Download PDFInfo
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- CN111809127B CN111809127B CN202010695606.7A CN202010695606A CN111809127B CN 111809127 B CN111809127 B CN 111809127B CN 202010695606 A CN202010695606 A CN 202010695606A CN 111809127 B CN111809127 B CN 111809127B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
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- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a preparation method of an aluminum alloy foil for an aluminum diaphragm of a loudspeaker, which comprises the following steps: s1, preparing an ingot, namely preparing an aluminum alloy ingot by using 5052 alloy as a raw material and adopting a semi-continuous casting method; s2, carrying out homogenization heat treatment and machining and surface milling on the aluminum alloy ingot obtained in the step S1, and then carrying out hot rolling on the aluminum alloy ingot to obtain a hot rolled blank; s3, cold rolling, namely, carrying out multi-pass cold rolling on the hot rolled blank obtained in the step S2 to obtain an intermediate product, and carrying out intermediate annealing on the intermediate product to obtain an aluminum foil blank; s4, foil rolling, namely cooling the aluminum foil rough material obtained in the step S3, then carrying out three-pass medium rolling to obtain an intermediate aluminum foil rough material with the thickness of 0.1mm, and then carrying out one-pass finish rolling on the intermediate aluminum foil rough material to obtain an aluminum foil with the thickness of 0.075 mm; s5, cleaning, namely sequentially carrying out concentrated alkali cleaning, weak alkali cleaning, water cleaning and drying on the aluminum foil obtained in the step S4 to obtain an aluminum alloy aluminum foil with a surface dyne value not lower than 72 dynes; the aluminum alloy aluminum foil prepared by the process has high plasticity, high rigidity and high bonding strength with the damping film layer.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy foil manufacturing, and particularly relates to a preparation method of an aluminum alloy foil for an aluminum diaphragm of a loudspeaker.
Background
The structure of the diaphragm is a critical factor affecting the sound production effect of the loudspeaker, and therefore, the design of the diaphragm is an important subject which is continuously developed in the field of loudspeaker design. The main design index of the loudspeaker is to reduce the own segmentation vibration and enough rigidity as much as possible; the split vibration mainly comes from the diaphragm of the loudspeaker, and the disordered vibration generated by the loudspeaker during operation and different from the sound source frequency is called split vibration due to the defects of the structure and the material of the diaphragm. This phenomenon of splitting vibrations reduces the simulation effect of the loudspeaker. A more ideal loudspeaker is to reduce the own divided vibration as much as possible, and effectively reduce the interference of the reflected energy of the diaphragm.
In order to improve the damping characteristic of the vibrating diaphragm and enable the vibrating diaphragm to absorb the noise generated by the sound pollution and the segmentation vibration of the vibrating diaphragm material, thereby obtaining the effect of high fidelity, the material is coated with a layer of damping film before being machined into the vibrating diaphragm, the bonding quality of the material and the damping film greatly influences the segmentation vibration effect of the loudspeaker, and the base material and the outer film are bonded into a whole.
At present, the common diaphragm in the market has the advantages of high plasticity, easy processing and low cost, but the rigidity is poor, and if the better rigidity is to be obtained, the thickness of the diaphragm needs to be increased. That is, the vibrating diaphragm is poor in rigidity or too thick, and the characteristics of rigidity and thickness cannot be considered.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method of an aluminum alloy foil for preparing an aluminum loudspeaker diaphragm with high plasticity, high rigidity and high adhesion with a damping film layer.
The technical scheme of the invention is as follows:
a preparation method of an aluminum alloy foil for an aluminum diaphragm of a loudspeaker comprises the following steps:
s1, preparing an ingot, namely preparing a 550-630 mm aluminum alloy ingot by using 5052 alloy as a raw material and adopting a semi-continuous casting method;
s2, carrying out homogenization heat treatment and machining and surface milling on the aluminum alloy ingot obtained in the step S1, and then carrying out hot rolling to obtain a hot rolled blank with the thickness of 4.5-5.5 mm, wherein the final rolling temperature is not lower than 320 ℃;
s3, cold rolling, namely, carrying out multi-pass cold rolling on the hot rolled blank obtained in the step S2 to obtain an intermediate product with the thickness of 0.49mm-0.51mm, carrying out intermediate annealing on the intermediate product, wherein the annealing temperature is 330-340 ℃, and carrying out heat preservation for 2-4h to obtain aluminum foil blanks;
s4, foil rolling, namely cooling the aluminum foil rough material obtained in the step S3, then carrying out three-pass medium rolling to obtain an intermediate aluminum foil rough material with the thickness of 0.1mm, and then carrying out one-pass finish rolling on the intermediate aluminum foil rough material to obtain an aluminum foil with the thickness of 0.075 mm;
and S5, cleaning, namely sequentially carrying out concentrated alkali cleaning, weak alkali cleaning, water cleaning and drying on the aluminum foil obtained in the step S4 to obtain the aluminum alloy aluminum foil with the surface dyne value not lower than 72 dynes.
Further, in the step S1, the aluminum alloy ingot comprises the following components in percentage by mass: less than or equal to 0.05 percent of Si, 0.17-0.25 percent of Fe, less than or equal to 0.05 percent of Cu, less than or equal to 0.1 percent of Mn, 2.4-2.8 percent of Mg, 0.15-0.18 percent of Cr0.05 percent of Zn, 0.024-0.031 percent of Ti, and the balance of Al.
Further, the thickness of the hot rolled slab obtained in the step S2 was 5.0 mm.
Further, the thickness of the aluminum foil blank obtained in the step S3 is 0.5 mm.
Further, in the step S4, the finish rolling reduction is 25%, and the surface-second roughness Ra of the aluminum foil is 0.20 to 0.25 μm.
Further, in the step S4, the finishing roll when finish rolling is performed on the 0.1mm intermediate aluminum foil blank is ground with a ceramic 280# grinding wheel.
Further, in the step S5:
when the concentrated alkali washing is carried out, the PH value of an alkali cabin for the concentrated alkali washing is 12.5-13.5;
when weak alkaline washing is carried out, the PH value of an alkaline bin for weak alkaline washing is 9.0-9.5;
when water washing is carried out, deionized water is filled in the water washing bin, the content of suspended solid in water is less than or equal to 50mg/L, when water washing is carried out, common water washing and high-pressure spray washing are carried out on the aluminum foil in sequence, and the spray pressure of the high-pressure spray washing is 0.2-0.3 bar;
when the aluminum foil is cleaned, the conveying speed of the aluminum foil is 100-120 m/min.
Furthermore, the tensile strength sigma b of the aluminum alloy aluminum foil is 300-320 MPa, and the elongation A50% is more than or equal to 5.0%.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a preparation method of an aluminum alloy foil for an aluminum loudspeaker diaphragm, which is characterized in that an aluminum alloy aluminum foil with a sound value not lower than 72 dyne is prepared after soaking treatment, machining face milling, hot rolling, multi-pass cold rolling, multi-pass foil rolling and cleaning are carried out on an aluminum alloy cast ingot, so that the bonding strength of the aluminum alloy aluminum foil and a damping film layer is improved when the aluminum loudspeaker diaphragm is manufactured, the segmentation vibration of a loudspeaker is further reduced, and the simulation effect of the loudspeaker is improved;
in the process of preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker, the hot rolled blank obtained by soaking treatment, machining and surface milling and hot rolling is subjected to multi-pass cold rolling and annealing, and then is subjected to multi-pass intermediate rolling and one-pass finish rolling, so that the prepared finished product has good plasticity and rigidity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A preparation method of an aluminum alloy foil for an aluminum diaphragm of a loudspeaker comprises the following steps:
s1, preparing an ingot, namely preparing a 550-630 mm aluminum alloy ingot by using 5052 alloy as a raw material and adopting a semi-continuous casting method;
s2, carrying out homogenization heat treatment and machining and surface milling on the aluminum alloy ingot obtained in the step S1, and then carrying out hot rolling to obtain a hot rolled blank with the thickness of 4.5-5.5 mm, wherein the final rolling temperature is not lower than 320 ℃;
s3, cold rolling, namely, carrying out multi-pass cold rolling on the hot rolled blank obtained in the step S2 to obtain an intermediate product with the thickness of 0.49mm-0.51mm, carrying out intermediate annealing on the intermediate product, wherein the annealing temperature is 330-340 ℃, and carrying out heat preservation for 2-4h to obtain aluminum foil blanks;
s4, foil rolling, namely cooling the aluminum foil rough material obtained in the step S3, then carrying out three-pass medium rolling to obtain an intermediate aluminum foil rough material with the thickness of 0.1mm, and then carrying out one-pass finish rolling on the intermediate aluminum foil rough material to obtain an aluminum foil with the thickness of 0.075 mm;
and S5, cleaning, namely sequentially carrying out concentrated alkali cleaning, weak alkali cleaning, water cleaning and drying on the aluminum foil obtained in the step S4 to obtain the aluminum alloy aluminum foil with the surface dyne value not lower than 72 dynes.
In step S2, the finishing temperature in the hot rolling process is not lower than 320 ℃, which is the recrystallization temperature of 5052 alloy, and the hot rolling temperature is controlled above 320 ℃, so that the hot rolled blank is automatically annealed after being taken off the mill, thereby effectively softening the blank and creating good conditions for the subsequent cold rolling and foil rolling processes.
Further, in the step S1, the aluminum alloy ingot comprises the following components in percentage by mass: less than or equal to 0.05 percent of Si, 0.17-0.25 percent of Fe, less than or equal to 0.05 percent of Cu, less than or equal to 0.1 percent of Mn, 2.4-2.8 percent of Mg, 0.15-0.18 percent of Cr0.05 percent of Zn, 0.024-0.031 percent of Ti, and the balance of Al; the mass percentages of Mg, Cr, Zn and Ti are controlled in a small interval so as to ensure that the prepared aluminum alloy cast ingot has good stability and further ensure that the supported aluminum alloy aluminum foil has good stability.
In this embodiment, the thickness of the hot-rolled blank obtained in step S2 is 5.0 mm; because the size of crystal grains during annealing after deformation is directly influenced by the metal deformation degree, the hot rolled blank with the thickness of 5.0 is cold rolled to be intermediate annealed to the thickness of 0.5mm, the corresponding cold rolling reduction rate is 90 percent, and the material crystal grains can be effectively refined by performing recrystallization annealing after the cold rolling of 90 percent; if the hot rolled stock is chosen too thick, rolling difficulties can result from severe work hardening.
In this embodiment, the thickness of the aluminum foil blank obtained in step S3 is 0.5mm, and the aluminum foil blank with the thickness is subjected to a foil rolling procedure to roll an aluminum alloy aluminum foil with a thickness of 0.075mm, so as to ensure a processing rate of 85%; because the performance of the material after cold working is related to the work hardening degree of the material, the tensile strength of the aluminum foil blank with the thickness of 0.5mm reaches 310MPa after the aluminum foil blank is cold worked by 85 percent, and the elongation reaches 6 percent.
In this example, in step S4, the finish rolling reduction rate is 25%, and the surface-second roughness Ra of the aluminum foil is 0.20 to 0.25 μm; a finishing roller is ground by a ceramic 280# grinding wheel when the 0.1mm middle aluminum foil blank is finish rolled; the aluminum foil is ground by the ceramic 280# grinding wheel, so that the roughness of the surface of the aluminum foil can be reduced, the roughness of the surface of the aluminum foil reaches Ra0.20-0.25 micrometer, and the surface of the aluminum foil is more uniform and fine.
Further, in the step S5:
when the concentrated alkali washing is carried out, the PH value of an alkali cabin for the concentrated alkali washing is 12.5-13.5;
when weak alkaline washing is carried out, the PH value of an alkaline bin for weak alkaline washing is 9.0-9.5;
when water washing is carried out, deionized water is filled in the water washing bin, the content of suspended solid in water is less than or equal to 50mg/L, when water washing is carried out, common water washing and high-pressure spray washing are carried out on the aluminum foil in sequence, and the spray pressure of the high-pressure spray washing is 0.2-0.3 bar;
when the aluminum foil is cleaned, the transmission speed of the aluminum foil is 100-120 m/min;
the concentrated alkali washing and the weak alkali washing can remove dirt on the surface of the aluminum foil and thoroughly remove a natural oxidation film on the surface of the aluminum foil so as to expose a pure metal organism, and play a decisive role in improving the dyne value of the surface of the aluminum foil; the alkaline cleaning process is the most important one in cleaning aluminum products, and the alkaline cleaning agent has good wetting property, has strong emulsification effect on grease and forms soluble soaps; meanwhile, the aluminum foil anti-coagulation agent can reversely coagulate dirt particles, so that the dirt particles are dispersed in a solution in a colloidal form and are not deposited on the surface, and the oil stains on the surface of the aluminum foil can be thoroughly removed;
when the aluminum loudspeaker diaphragm is manufactured, the adhesion strength between the aluminum alloy aluminum foil and the damping film layer is improved, the segmentation vibration of the loudspeaker is reduced, and the simulation effect of the loudspeaker is improved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A preparation method of an aluminum alloy foil for an aluminum diaphragm of a loudspeaker is characterized by comprising the following steps:
s1, preparing an ingot, namely preparing a 550-630 mm aluminum alloy ingot by using 5052 alloy as a raw material and adopting a semi-continuous casting method;
s2, carrying out homogenization heat treatment and machining and surface milling on the aluminum alloy ingot obtained in the step S1, and then carrying out hot rolling to obtain a hot rolled blank with the thickness of 4.5-5.5 mm, wherein the final rolling temperature is not lower than 320 ℃;
s3, cold rolling, namely, carrying out multi-pass cold rolling on the hot rolled blank obtained in the step S2 to obtain an intermediate product with the thickness of 0.49mm-0.51mm, carrying out intermediate annealing on the intermediate product, wherein the annealing temperature is 330-340 ℃, and carrying out heat preservation for 2-4h to obtain aluminum foil blanks;
s4, foil rolling, namely cooling the aluminum foil rough material obtained in the step S3, then carrying out three-pass medium rolling to obtain an intermediate aluminum foil rough material with the thickness of 0.1mm, and then carrying out one-pass finish rolling on the intermediate aluminum foil rough material to obtain an aluminum foil with the thickness of 0.075 mm;
s5, cleaning, namely sequentially carrying out concentrated alkali cleaning, weak alkali cleaning, water cleaning and drying on the aluminum foil obtained in the step S4 to obtain an aluminum alloy aluminum foil with a surface dyne value not lower than 72 dynes; when the concentrated alkali washing is carried out, the pH value of an alkali cabin for the concentrated alkali washing is 12.5-13.5; when weak alkaline washing is carried out, the pH value of an alkaline cabin for weak alkaline washing is 9.0-9.5; when water washing is carried out, deionized water is filled in the water washing bin, the content of suspended solid in water is less than or equal to 50mg/L, when water washing is carried out, common water washing and high-pressure spray washing are carried out on the aluminum foil in sequence, and the spray pressure of the high-pressure spray washing is 0.2-0.3 bar; when the aluminum foil is cleaned, the conveying speed of the aluminum foil is 100-120 m/min.
2. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker of claim 1, wherein in the step S1, the aluminum alloy ingot comprises the following components in percentage by mass: less than or equal to 0.05 percent of Si, 0.17-0.25 percent of Fe0.05 percent, less than or equal to 0.05 percent of Cu, less than or equal to 0.1 percent of Mn, 2.4-2.8 percent of Mg2, 0.15-0.18 percent of Cr0.05 percent, less than or equal to 0.05 percent of Zn, 0.024-0.031 percent of Ti0.024, and the balance of Al.
3. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker as claimed in claim 1, which is characterized in that: the thickness of the hot rolled slab obtained in the step S2 was 5.0 mm.
4. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker as claimed in claim 1, which is characterized in that: the thickness of the aluminum foil blank obtained in the step S3 is 0.5 mm.
5. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker as claimed in claim 1, which is characterized in that: in the step S4, the finish rolling reduction is 25%, and the surface roughness Ra of the aluminum foil is 0.20 to 0.25 μm.
6. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker as claimed in claim 5, which is characterized in that: in the step S4, the finishing roll used when finishing the 0.1mm intermediate aluminum foil blank is ground using a ceramic 280# grinding wheel.
7. The method for preparing the aluminum alloy foil for the aluminum diaphragm of the loudspeaker as claimed in claim 1, which is characterized in that: the tensile strength sigma b of the aluminum alloy aluminum foil is 300-320 MPa, and the elongation A50% is more than or equal to 5.0%.
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| CN202010695606.7A CN111809127B (en) | 2020-07-17 | 2020-07-17 | Preparation method of aluminum alloy foil for aluminum diaphragm of loudspeaker |
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| KR102609847B1 (en) * | 2021-01-28 | 2023-12-05 | 용지에 뉴 머티리얼 컴퍼니 리미티드 | Processing method of battery aluminum foil |
| CN114472523B (en) * | 2022-01-26 | 2024-03-19 | 永杰新材料股份有限公司 | Preparation method of high-brightness aluminum plastic film aluminum foil and aluminum plastic film aluminum foil |
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2020
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| JPH02299714A (en) * | 1989-03-14 | 1990-12-12 | Kobe Steel Ltd | Rolling target shape adjusting device for metallic foil |
| CN104294112A (en) * | 2013-07-16 | 2015-01-21 | 大力神铝业股份有限公司 | Production method of aluminum alloy foil for aviation lunch box |
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