CN105633316A - Aluminum-alloy battery cover, preparation method thereof and electronic device - Google Patents
Aluminum-alloy battery cover, preparation method thereof and electronic device Download PDFInfo
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- CN105633316A CN105633316A CN201510960839.4A CN201510960839A CN105633316A CN 105633316 A CN105633316 A CN 105633316A CN 201510960839 A CN201510960839 A CN 201510960839A CN 105633316 A CN105633316 A CN 105633316A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides an aluminum-alloy battery cover, a preparation method thereof and an electronic device. The preparation method comprises the following steps of carrying out hot rolling and cold rolling on an aluminum-alloy ingot block to obtain an aluminum-alloy plate with deformable texture in the interior; carrying out re-crystallization annealing on the aluminum-alloy plate obtained through rolling; and processing, decorating and post-processing the aluminum-alloy after annealing to obtain the aluminum-alloy battery cover. According to the preparation method of the aluminum-alloy battery cover, provided by the invention, the annealing temperature after rolling is increased, stress relief annealing of an annealing process is changed to re-crystallization annealing, and thus, the effect of refining grain is developed; after the grain is refined, the number and the size of the deformable texture in the interior of the aluminum-alloy plate are reduced, thus, the texture defect of the aluminum-alloy battery cover can be finally improved, and the surface flatness and the attractiveness of a product are improved.
Description
Technical field
The present invention relates to Cellphone Accessories technical field, in particular to a kind of aluminium alloy electric basin lid and preparation method thereof, and comprise the mobile phone of this aluminium alloy electric basin lid.
Background technology
At present, the present stage preparation method of aluminium alloy electric basin lid is as follows: melted ingot casting, ingot mill surface, ingot casting heating, hot rolling, cold rolling, stress relief annealing, CNC1, T process+injection moulding, CNC2, sanding and polishing, sandblasting, anodic oxidation 1, Gao Guang, anodic oxidation 2, due to a series of reason, there is macroscopic obvious material stricture of vagina defect after anode oxidation process in aluminium alloy electric basin lid, namely in fibrous taeniae telarum, affect profile pattern and the aesthetics of battery cover, and then affect the aesthetics of mobile phone and the yields of battery cover.
Summary of the invention
In order to solve above-mentioned technical problem at least one, it is an object of the present invention to provide a kind of can be effectively improved material the stricture of vagina defect preparation method to improve the aluminium alloy electric basin lid of profile pattern and aesthetics.
Further object is that the aluminium alloy electric basin lid providing a kind of preparation method adopting above-mentioned aluminium alloy electric basin lid to make.
Another purpose of the present invention is in that to provide a kind of mobile phone including above-mentioned aluminium alloy electric basin lid.
To achieve these goals, the preparation method that the embodiment of first aspect present invention provides a kind of aluminium alloy electric basin lid, including: milling step: aluminium alloy ingot bar is sequentially carried out hot rolling and cold rolling, obtain inside and there is the aluminum alloy plate materials of deformation texture; Annealing steps: the described aluminum alloy plate materials obtained after rolling is carried out recrystallization annealing; Battery cover forming step: the described aluminum alloy plate materials that obtains after annealing is processed, decorates and post processing obtains described aluminium alloy electric basin lid.
The preparation method of the aluminium alloy electric basin lid that the embodiment of first aspect present invention provides, annealing process after rolling is become recrystallization annealing, recrystallization annealing is utilized to carry out the crystal grain within refining aluminum alloy sheet material, then larger-size crystal grain can be refined into multiple little crystal grain, thus the quantity of the big crystal grain that left behind can greatly reduce, therefore the quantity of the deformation texture that left behind can greatly reduce, size also can be greatly reduced, and distribution relative distribution, therefore the tissue size after aligning is also smaller, not easily by human eye perception, thus playing the effect improving material stricture of vagina, improve profile pattern and the aesthetics of product.
It is to be understood that it have been investigated that, the material stricture of vagina of present stage aluminium alloy electric basin lid has the drawback that, owing to deformation texture forms uneven groove through anodic oxidation, groove is perceived to the refraction angle difference of light; And the formation of deformation texture is relevant with the moulding process of aluminium sheet: by rolling, aluminium ingot thickness is thinning, grain matrix �� phase and hardening constituent �� phase (Mg2Si) being elongated, due to preferentially orienting effect, fibrous crystal grain can arrange along certain direction, causes the anisotropy of crystal grain; Due to the coarse grains of melting ingot casting, after follow-up stress relief annealing, deformation texture left behind and larger in size, aligns rear tissue size and reaches by the scope of human eye perception, forms material stricture of vagina; Additionally, due to �� phase intensity is relatively low, in follow-up bruting process, easily it is removed because polishing direction is identical with the orientation of deformation texture, causes the refraction angle after anodic oxidation to increase, cause that defect exposes and become apparent from. And the present invention is by improving the annealing temperature after rolling, annealing process is made to be become recrystallization annealing from stress relief annealing, thus serving the effect of crystal grain thinning, and after grain refinement, the quantity of the deformation texture within aluminum alloy plate materials and size all can reduce, it is thus able to improve the material stricture of vagina defect of final aluminium alloy electric basin lid, improves profile pattern and the aesthetics of product.
Here, deformation texture refer to crystalline material occur plastic deformation time, crystal and hardening constituent can deform, by isometry at random to become banding towards specific direction arrange; Preferred orientation refers to the crystal grain of crystal in varying degrees around the orientations that some resistance of deformation is little; Recrystallization refers to when annealing temperature is sufficiently high, time long enough time, in the microscopic structure of deformable metal or alloy, produce strainless new crystal grain.
It addition, the preparation method of the aluminium alloy electric basin lid in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, described battery cover forming step specifically includes: blank forming step: the described aluminum alloy plate materials obtained after annealing is processed, decorates the blank obtaining described aluminium alloy electric basin lid; Post-processing step: described blank is carried out post processing, obtains described aluminium alloy electric basin lid.
Aluminium alloy electric basin lid is as the external precision parts of the electronic equipments such as mobile phone, both the aspect of performances such as physical chemistry had higher requirement, outward appearance is also had higher requirement simultaneously, thus blank need to be obtained through series of steps such as processing decorations from aluminum alloy plate materials to final finished product, the post processing that then blank carries out some row can obtain all satisfactory aluminium alloy electric basin lid finished product of performance, outward appearance.
In technique scheme, described post-processing step specifically includes: sanding and polishing step: the surface of described blank is carried out grinding process and polishing; Sandblasting step: the described blank obtained after sanding and polishing is carried out blasting treatment; First time anodization step: the described blank obtained after blasting treatment is carried out first time anodic oxidation; Colouring step: the described blank obtained after first time anodic oxidation is carried out colouring process, makes described blank painted; High light step: the arris of the described blank after painted is carried out high light processing, makes the arris of described blank have mirror effect; Second time anodization step: the described blank obtained after high light is processed carries out second time anodic oxidation, obtains described aluminium alloy electric basin lid.
After obtaining the blank of aluminium alloy electric basin lid, first, its surface is carried out grinding process and polishing, to remove the burr of blank surface, floating rust, greasy dirt, dust etc., it is thus achieved that flat surface, and improve the adhesive force of blank surface; Then, it is carried out blasting treatment, utilize percussion cleaning and the alligatoring blank surface of high speed sand flow so that it is obtain certain cleannes and roughness, and improve the mechanical performance of blank surface, improve anti-fatigue performance; Carry out anodic oxidation afterwards, certain thickness alumina flake is produced at blank surface, case hardness and the mar proof of aluminium alloy blank can be improved on the one hand, on the other hand alumina flake comprises substantial amounts of micropore, it is simple to the filling attachment of colorant when follow-up colouring processes; Then colouring process is carried out, owing to colorant can fill and be attached in the micropore of oxide layer, thus firm coloration and uniformly; Afterwards, the arris of blank is carried out high optical processing so that it is smooth that the arris of blank becomes rule, and has mirror effect, and the details position enabling aluminum alloy to battery cover is also effectively beautified, the aesthetics overall to ensure product; Finally blank is carried out two-step anodization, whole blank surface is made to produce fine and close hard alumina flake, this alumina flake has certain thickness, hardness and the wearability of product can be effectively improved, and there is good thermostability and excellent insulating properties, and improve the corrosion resistance etc. of product, namely ensure that the combination property of aluminium alloy electric basin lid.
In any of the above-described technical scheme, in described sanding and polishing step, between polishing direction and the orientation of described deformation texture, there is angle.
Aluminium alloy ingot bar is in the process of rolling, and grain matrix �� phase is elongated with hardening constituent �� phase, is deformed texture by preferred orientation, and deformation texture is likely to become macroscopic bacillar structure band after aligning, i.e. material stricture of vagina defect, this programme is arranged has angle between polishing direction and the orientation of deformation texture, the i.e. direction of polishing direction deviation deformation texture, the texture structure aligned can be cut off on the one hand, thus the size of Reducing distortion texture, to reduce the probability forming material stricture of vagina defect, the matrix �� phase of the texture direction got rid of can be reduced on the other hand, hardening constituent �� is avoided excessively to protrude, thus the refraction angle difference of material surface after reducing anodic oxidation, also reduce the probability that material stricture of vagina defect produces, therefore this programme is by optimizing the technique for grinding in last handling process, further improve the material stricture of vagina defect of aluminum alloy battery cap surface, further increase planarization and the aesthetics of product.
In any of the above-described technical scheme, described angle is 90 ��.
The angle arranged between polishing direction and aluminum alloy plate materials internal modification texture orientation is 90 ��, namely polishing direction is perpendicular to the orientation of deformation texture, the size of deformation texture can be preferably minimized on the one hand, can the matrix of the texture direction got rid of be dropped to minimum mutually on the other hand, it is thus able to significantly improve the material stricture of vagina defect of aluminum alloy battery cap surface, hence it is evident that improve planarization and the aesthetics of product. Certainly, polishing direction is basically perpendicular to the direction of deformation texture, can play the effective effect improving material stricture of vagina defect. In actual production process, the orientation of deformation texture is general identical with the direction of rolling, and in following process process, generally can cut along the direction identical and vertical with rolling direction, make the substantially longitudinal arrangement of the deformation texture on blank, so when later stage grinding process, make emery wheel along the traverse feed of blank, can ensure that polishing direction is basically perpendicular to the direction of deformation texture, thus playing the effect improving material stricture of vagina defect.
In any of the above-described technical scheme, described blank forming step specifically includes: first time procedure of processing: the described aluminum alloy plate materials obtained after annealing is processed into the roughing part main body corresponding with the roughing size of described aluminium alloy electric basin lid; Working of plastics decoration step: plastic decorating part is connected in described roughing part main body, obtains the roughing part of described aluminium alloy electric basin lid; Second time procedure of processing: described roughing part is processed into the blank corresponding with the blank dimension of described aluminium alloy electric basin lid.
First the aluminum alloy plate materials after annealing is carried out first time processing so that it is the aluminum alloy body of shape and aluminium alloy electric basin lid is essentially identical, but size is a bit larger tham blank dimension because leaving allowance, be referred to as roughing part main body; Then roughing part main body is carried out working of plastics decoration, working of plastics is connected to the corresponding position of roughing part main body, then obtain the roughing part that shape is essentially identical with aluminium alloy electric basin lid; Roughing part is carried out second time processing again so that it is shape, size are all essentially identical with aluminium alloy electric basin lid, namely obtain the blank of aluminium alloy electric basin lid. So by repeatedly processing the blank obtained, quality is good, and yields is high. Certainly, if aluminium alloy electric basin lid entirety is aluminum alloy material, during without plastic decorating part, then working of plastics is decorated this step and can be saved, in actual production process, it should determine concrete preparation technology according to final product requirement.
In any of the above-described technical scheme, in described first time procedure of processing, adopt CNC technique that the described aluminum alloy plate materials obtained after annealing is processed into the roughing part main body corresponding with the roughing size of described aluminium alloy electric basin lid; In described working of plastics decoration step, adopt NMT technique to be connected to by described plastic decorating part in described roughing part main body, obtain the roughing part of described aluminium alloy electric basin lid; In described second time procedure of processing, adopt CNC technique that described roughing part is processed into the blank corresponding with the blank dimension of described aluminium alloy electric basin lid.
Adopt CNC (Computernumericalcontrol, computer numerical control (CNC)) technique carry out first time processing and secondary operations, only processor need to be inputted in computer, Digit Control Machine Tool can be automatically performed the course of processing, very simple, and machining accuracy is high, and crudy is stable, automaticity is high, is suitable to mass production. Certainly; can also be processed by machine tool or other modes, as long as required shape and size can be processed, all be capable of the purpose of the present invention; therefore it will be understood by those of skill in the art that these technical schemes are also in protection scope of the present invention.
NMT (NanoMoldingTechnology, nanometer forming technique) be one by injection mo(u)lding by new technique integrated with plastics for metal, adopt NMT technique that plastic decorating part and aluminium alloy roughing part body junction are combined, make metal master and the plastic decorating part can be integrally formed, it is not only able to take into account the metal appearance texture of aluminium alloy, the design of product construction part can also be simplified, make battery cover lighter, thin, short, little, and more cost-effective compared with CNC technique. Specifically, first aluminium alloy roughing part main body is carried out nanorize process, such as T process, HK process etc., its surface is made to form nano level pit, then plastics directly penetrate, and enter nano level pit by injection moulding, are combined with the microphysics of plastics reaching metal, adhesion is strong, namely plastic decorating part can be molded directly within aluminium alloy roughing part body surfaces, simplifies technique, and improves the bond strength of the two. It is of course also possible to completed the interpolation of plastic decorating part by other techniques, such as CNC technique, technique for sticking etc.; it also is able to realize the purpose of the present invention; will not enumerate at this, it is understood by those skilled in the art that these technical schemes are also in protection scope of the present invention.
In any of the above-described technical scheme, the preparation method of described aluminium alloy electric basin lid also includes: ingot casting melting step: the ingot casting of raw material or remelting is loaded melting in smelting furnace, obtains aluminium alloy melt; Ingot bar forming step: described aluminium alloy melt melting obtained pours die for molding into, obtains aluminium alloy ingot bar; Milling face step: the side of described aluminium alloy ingot bar and big face meeting dimensional requirement is carried out the process of milling face.
Owing to aluminium alloy electric basin lid has certain size and dimension, and require the combination properties such as certain physical chemistry, so by size, shape, the restriction of composition etc., not all aluminium ingot all can be directly used for preparing aluminium alloy electric basin lid, therefore need after common aluminium ingot remelting, and add other suitable elements, obtain the satisfactory aluminium alloy melt of composition, then molding in a mold, to prepare size, shape, combination properties etc. are suitable to make the aluminum ingot of battery cover, again it is carried out the process of milling face, the roughness making big face and side meets the requirements, can carry out rolling the preparation for aluminium alloy electric basin lid. certainly, if the combination property of common aluminium ingot meets the requirements, in the process of melting, then other components need not be it is possible to additionally incorporate to improve the combination property of aluminium ingot. or, the directly demand according to combination property, choose the direct melting of raw material according to certain formula, to obtain the satisfactory aluminium alloy melt of composition, the ingot bar then prepare shape, being of the required size. in actual production, it is possible to select concrete melting mode according to the quality etc. of the requirement of production lot, common aluminium ingot.
In any of the above-described technical scheme, the preparation method of described aluminium alloy electric basin lid also includes: homogenize heat treatment step: homogenize heat treatment to the described aluminium alloy ingot bar obtained after the process of milling face.
Behind ingot bar milling face, first carry out homogenizing heat treatment, it is possible to is effectively improved the uniformity of ingot bar internal organizational structure, so can reduce resistance during hot rolling, and improve the effect of rolling of hot rolling. Preferably, compared with prior art, suitably reduce the drafts of hot rolling, and suitably increase amount under cold rolling bundle, so can improve the cold deformation before recrystallization annealing, prepare for follow-up recrystallization annealing. Owing to cold rolling drafts increases, deformation quantity increases, dislocation density increases, and internal stress increases, and forming core point increases, therefore the temperature of recrystallization can be reduced, and grain refinement also becomes apparent from, intensity and the toughness of product can either be improved, concurrently facilitate the quantity and size that reduce texture, improve material stricture of vagina defect with further, improve planarization and the aesthetics of product.
The embodiment of second aspect present invention provides a kind of aluminium alloy electric basin lid, for mobile phone, adopts the preparation method of the aluminium alloy electric basin lid any one of the embodiment of above-mentioned first aspect to make.
The aluminium alloy electric basin lid that the embodiment of second aspect present invention provides, because adopting the preparation method of the aluminium alloy electric basin lid any one of above-mentioned first aspect embodiment to make, thus effectively improves the material stricture of vagina defect on surface, has higher flatness and aesthetic property.
The embodiment of third aspect present invention provides a kind of mobile phone, including the aluminium alloy electric basin lid in above-mentioned second aspect embodiment.
The mobile phone that the embodiment of third aspect present invention provides, because including the aluminium alloy electric basin lid in above-mentioned second aspect embodiment, thus improves planarization and the aesthetics on surface.
The additional aspect of the present invention and advantage will become apparent upon in description below part, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the schematic flow sheet of the preparation method of aluminium alloy electric basin lid of the present invention;
Fig. 2 is the schematic flow sheet of the preparation method of aluminium alloy electric basin lid described in some embodiments of the invention;
Fig. 3 is the schematic flow sheet of step 700 described in some embodiments of the invention;
Fig. 4 is the schematic flow sheet of the preparation method of aluminium alloy electric basin lid described in other embodiments of the present invention.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail. It should be noted that when not conflicting, embodiments herein and the feature in embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present invention; but; the present invention can also adopt other to be different from other modes described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment.
Referring to Fig. 1 to Fig. 4 preparation method describing aluminium alloy electric basin lid described according to some embodiments of the invention.
As it is shown in figure 1, the preparation method of the aluminium alloy electric basin lid of the embodiment offer of first aspect present invention, including:
Step 500, is sequentially carried out hot rolling and cold rolling to aluminium alloy ingot bar, obtains inside and has the aluminum alloy plate materials of deformation texture;
Step 600, carries out recrystallization annealing to the aluminum alloy plate materials obtained after rolling;
Step 700, is processed the aluminum alloy plate materials that obtains after annealing, decorates and post processing obtains aluminium alloy electric basin lid.
The preparation method of the aluminium alloy electric basin lid that the embodiment of first aspect present invention provides, annealing process after rolling is become recrystallization annealing, recrystallization annealing is utilized to carry out the crystal grain within refining aluminum alloy sheet material, then larger-size crystal grain can be refined into multiple little crystal grain, thus the quantity of the big crystal grain that left behind can greatly reduce, therefore the quantity of the deformation texture that left behind can greatly reduce, size also can be greatly reduced, and distribution relative distribution, therefore the tissue size after aligning is also smaller, not easily by human eye perception, thus playing the effect improving material stricture of vagina, improve profile pattern and the aesthetics of product.
It is to be understood that it have been investigated that, the material stricture of vagina of present stage aluminium alloy electric basin lid has the drawback that, owing to deformation texture forms uneven groove through anodic oxidation, groove is perceived to the refraction angle difference of light; And the formation of deformation texture is relevant with the moulding process of aluminium sheet: by rolling, aluminium ingot thickness is thinning, grain matrix �� phase and hardening constituent �� phase (Mg2Si) being elongated, due to preferentially orienting effect, fibrous crystal grain can arrange along certain direction, causes the anisotropy of crystal grain; Due to the coarse grains of melting ingot casting, after follow-up stress relief annealing, deformation texture left behind and larger in size, aligns rear tissue size and reaches by the scope of human eye perception, forms material stricture of vagina; Additionally, due to �� phase intensity is relatively low, in follow-up bruting process, easily it is removed because polishing direction is identical with the orientation of deformation texture, causes the refraction angle after anodic oxidation to increase, cause that defect exposes and become apparent from. And the present invention is by improving the annealing temperature after rolling, annealing process is made to be become recrystallization annealing from stress relief annealing, thus serving the effect of crystal grain thinning, and after grain refinement, the quantity of the deformation texture within aluminum alloy plate materials and size all can reduce, it is thus able to improve the material stricture of vagina defect of final aluminium alloy electric basin lid, improves profile pattern and the aesthetics of product.
In some embodiments of the invention, as in figure 2 it is shown, step 700 specifically includes:
Step 710, is processed the aluminum alloy plate materials obtained after annealing, decorates the blank obtaining aluminium alloy electric basin lid;
Step 720, carries out post processing to blank, obtains aluminium alloy electric basin lid.
In the above-described embodiments, aluminium alloy electric basin lid is as the external precision parts of the electronic equipments such as mobile phone, both the aspect of performances such as physical chemistry had higher requirement, outward appearance is also had higher requirement simultaneously, thus blank need to be obtained through series of steps such as processing decorations from aluminum alloy plate materials to final finished product, the post processing that then blank carries out some row can obtain all satisfactory aluminium alloy electric basin lid finished product of performance, outward appearance.
In some embodiments of the invention, as it is shown on figure 3, step 720 specifically includes:
Step 7202, carries out grinding process and polishing to the surface of blank;
Step 7204, carries out blasting treatment to the blank obtained after sanding and polishing;
Step 7206, carries out first time anodic oxidation to the blank obtained after blasting treatment;
Step 7208, carries out colouring process to the blank obtained after first time anodic oxidation, makes blank painted;
Step 7210, carries out high light processing to the arris of the blank after painted, makes the arris of blank have mirror effect;
Step 7212, the blank obtained after high light is processed carries out second time anodic oxidation, obtains aluminium alloy electric basin lid.
In these embodiments, after obtaining the blank of aluminium alloy electric basin lid, first, its surface is carried out grinding process and polishing, to remove the burr of blank surface, floating rust, greasy dirt, dust etc., it is thus achieved that flat surface, and improve the adhesive force of blank surface; Then, it is carried out blasting treatment, utilize percussion cleaning and the alligatoring blank surface of high speed sand flow so that it is obtain certain cleannes and roughness, and improve the mechanical performance of blank surface, improve anti-fatigue performance; Carry out anodic oxidation afterwards, certain thickness alumina flake is produced at blank surface, case hardness and the mar proof of aluminium alloy blank can be improved on the one hand, on the other hand alumina flake comprises substantial amounts of micropore, it is simple to the filling attachment of colorant when follow-up colouring processes; Then colouring process is carried out, owing to colorant can fill and be attached in the micropore of oxide layer, thus firm coloration and uniformly; Afterwards, the arris of blank is carried out high optical processing so that it is smooth that the arris of blank becomes rule, and has mirror effect, and the details position enabling aluminum alloy to battery cover is also effectively beautified, the aesthetics overall to ensure product; Finally blank is carried out two-step anodization, whole blank surface is made to produce fine and close hard alumina flake, this alumina flake has certain thickness, hardness and the wearability of product can be effectively improved, and there is good thermostability and excellent insulating properties, and improve the corrosion resistance etc. of product, namely ensure that the combination property of aluminium alloy electric basin lid.
In some embodiments of the invention, in step 7202, between polishing direction and the orientation of deformation texture, there is angle.
In these embodiments, aluminium alloy ingot bar is in the process of rolling, and grain matrix �� phase is elongated with hardening constituent �� phase, is deformed texture by preferred orientation, and deformation texture is likely to become macroscopic bacillar structure band after aligning, i.e. material stricture of vagina defect, this programme is arranged has angle between polishing direction and the orientation of deformation texture, the i.e. direction of polishing direction deviation deformation texture, the texture structure aligned can be cut off on the one hand, thus the size of Reducing distortion texture, to reduce the probability forming material stricture of vagina defect, the matrix �� phase of the texture direction got rid of can be reduced on the other hand, hardening constituent �� is avoided excessively to protrude, thus the refraction angle difference of material surface after reducing anodic oxidation, also reduce the probability that material stricture of vagina defect produces, therefore this programme is by optimizing the technique for grinding in last handling process, further improve the material stricture of vagina defect of aluminum alloy battery cap surface, further increase planarization and the aesthetics of product.
In one embodiment of the invention, angle is 90 ��.
In this embodiment, the angle arranged between polishing direction and aluminum alloy plate materials internal modification texture orientation is 90 ��, namely polishing direction is perpendicular to the orientation of deformation texture, the size of deformation texture can be preferably minimized on the one hand, can the matrix of the texture direction got rid of be dropped to minimum mutually on the other hand, it is thus able to significantly improve the material stricture of vagina defect of aluminum alloy battery cap surface, hence it is evident that improve planarization and the aesthetics of product. Certainly, polishing direction is basically perpendicular to the direction of deformation texture, can play the effective effect improving material stricture of vagina defect.
In actual production process, the orientation of deformation texture is general identical with the direction of rolling, and in following process process, generally can cut along the direction identical and vertical with rolling direction, make the substantially longitudinal arrangement of the deformation texture on blank, so when later stage grinding process, make emery wheel along the traverse feed of blank, can ensure that polishing direction is basically perpendicular to the direction of deformation texture, thus playing the effect improving material stricture of vagina defect.
In some embodiments of the invention, as it is shown on figure 3, step 710 specifically includes:
Step 7102, is processed into the roughing part main body corresponding with the roughing size of aluminium alloy electric basin lid by the aluminum alloy plate materials obtained after annealing;
Step 7104, is connected to plastic decorating part in roughing part main body, obtains the roughing part of aluminium alloy electric basin lid;
Step 7106, is processed into the blank corresponding with the blank dimension of aluminium alloy electric basin lid by roughing part.
In these embodiments, first the aluminum alloy plate materials after annealing is carried out first time processing so that it is the aluminum alloy body of shape and aluminium alloy electric basin lid is essentially identical, but size is a bit larger tham blank dimension because leaving allowance, be referred to as roughing part main body; Then roughing part main body is carried out working of plastics decoration, working of plastics is connected to the corresponding position of roughing part main body, then obtain the roughing part that shape is essentially identical with aluminium alloy electric basin lid; Roughing part is carried out second time processing again so that it is shape, size are all essentially identical with aluminium alloy electric basin lid, namely obtain the blank of aluminium alloy electric basin lid. So by repeatedly processing the blank obtained, quality is good, and yields is high.
Certainly, if aluminium alloy electric basin lid entirety is aluminum alloy material, during without plastic decorating part, then working of plastics is decorated this step and can be saved, in actual production process, it should determine concrete preparation technology according to final product requirement.
In one embodiment of the invention, in step 7102, adopt CNC technique that the aluminum alloy plate materials obtained after annealing is processed into the roughing part main body corresponding with the roughing size of aluminium alloy electric basin lid; In step 7104, adopt NMT technique to be connected to by plastic decorating part in roughing part main body, obtain the roughing part of aluminium alloy electric basin lid; In step 7106, adopt CNC technique that roughing part is processed into the blank corresponding with the blank dimension of aluminium alloy electric basin lid.
In this embodiment, adopt CNC (Computernumericalcontrol, computer numerical control (CNC)) technique carry out first time processing and secondary operations, only processor need to being inputted in computer, Digit Control Machine Tool can be automatically performed the course of processing, very simply, and machining accuracy is high, crudy is stable, and automaticity is high, is suitable to mass production.
Certainly; can also be processed by machine tool or other modes, as long as required shape and size can be processed, all be capable of the purpose of the present invention; therefore it will be understood by those of skill in the art that these technical schemes are also in protection scope of the present invention.
NMT (NanoMoldingTechnology, nanometer forming technique) be one by injection mo(u)lding by new technique integrated with plastics for metal, adopt NMT technique that plastic decorating part and aluminium alloy roughing part body junction are combined, make metal master and the plastic decorating part can be integrally formed, it is not only able to take into account the metal appearance texture of aluminium alloy, the design of product construction part can also be simplified, make battery cover lighter, thin, short, little, and more cost-effective compared with CNC technique. Specifically, first aluminium alloy roughing part main body is carried out nanorize process, such as T process, HK process etc., its surface is made to form nano level pit, then plastics directly penetrate, and enter nano level pit by injection moulding, are combined with the microphysics of plastics reaching metal, adhesion is strong, namely plastic decorating part can be molded directly within aluminium alloy roughing part body surfaces, simplifies technique, and improves the bond strength of the two.
It is of course also possible to completed the interpolation of plastic decorating part by other techniques, such as CNC technique, technique for sticking etc.; it also is able to realize the purpose of the present invention; will not enumerate at this, it is understood by those skilled in the art that these technical schemes are also in protection scope of the present invention.
In other embodiments of the present invention, as shown in Figure 4, the preparation method of aluminium alloy electric basin lid also includes:
Step 100, loads melting in smelting furnace by the ingot casting of raw material or remelting, obtains aluminium alloy melt;
Step 200, aluminium alloy melt melting obtained pours die for molding into, obtains aluminium alloy ingot bar;
Step 300, side and big face to aluminium alloy ingot bar carry out the process of milling face.
In these embodiments, owing to aluminium alloy electric basin lid has certain size and dimension, and require the combination properties such as certain physical chemistry, so by size, shape, the restriction of composition etc., not all aluminium ingot all can be directly used for preparing aluminium alloy electric basin lid, therefore need after common aluminium ingot remelting, and add other suitable elements, obtain the satisfactory aluminium alloy melt of composition, then molding in a mold, to prepare size, shape, combination properties etc. are suitable to make the aluminum ingot of battery cover, again it is carried out the process of milling face, the roughness making big face and side meets the requirements, can carry out rolling the preparation for aluminium alloy electric basin lid.
Certainly, if the combination property of common aluminium ingot meets the requirements, in the process of melting, then other components need not be it is possible to additionally incorporate to improve the combination property of aluminium ingot. Or, the directly demand according to combination property, choose the direct melting of raw material according to certain formula, to obtain the satisfactory aluminium alloy melt of composition, the ingot bar then prepare shape, being of the required size. In actual production, it is possible to select concrete melting mode according to the quality etc. of the requirement of production lot, common aluminium ingot.
In other embodiments of the present invention, as shown in Figure 4, the preparation method of aluminium alloy electric basin lid also includes:
Step 400, homogenize heat treatment to the aluminium alloy ingot bar obtained after the process of milling face.
In these embodiments, behind ingot bar milling face, first carry out homogenizing heat treatment, it is possible to is effectively improved the uniformity of ingot bar internal organizational structure, so can reduce resistance during hot rolling, and improve the effect of rolling of hot rolling. Preferably, compared with prior art, suitably reduce the drafts of hot rolling, and suitably increase amount under cold rolling bundle, so can improve the cold deformation before recrystallization annealing, prepare for follow-up recrystallization annealing. Owing to cold rolling drafts increases, deformation quantity increases, dislocation density increases, and internal stress increases, and forming core point increases, therefore the temperature of recrystallization can be reduced, and grain refinement also becomes apparent from, intensity and the toughness of product can either be improved, concurrently facilitate the quantity and size that reduce texture, improve material stricture of vagina defect with further, improve planarization and the aesthetics of product.
The aluminium alloy electric basin lid that the embodiment of second aspect present invention provides, for mobile phone, adopts the preparation method of the aluminium alloy electric basin lid any one of the embodiment of above-mentioned first aspect to make.
The aluminium alloy electric basin lid that the embodiment of second aspect present invention provides, because adopting the preparation method of the aluminium alloy electric basin lid any one of above-mentioned first aspect embodiment to make, thus effectively improves the material stricture of vagina defect on surface, has higher flatness and aesthetic property.
The mobile phone that the embodiment of third aspect present invention provides, including the aluminium alloy electric basin lid in above-mentioned second aspect embodiment.
The mobile phone that the embodiment of third aspect present invention provides, because including the aluminium alloy electric basin lid in above-mentioned second aspect embodiment, thus improves planarization and the aesthetics on surface.
In sum, the preparation method of aluminium alloy electric basin lid provided by the invention, annealing process after rolling is become recrystallization annealing, recrystallization annealing is utilized to carry out the crystal grain within refining aluminum alloy sheet material, then larger-size crystal grain can be refined into multiple little crystal grain, thus the quantity of the big crystal grain that left behind can greatly reduce, therefore the quantity of the deformation texture that left behind can greatly reduce, size also can be greatly reduced, and distribution relative distribution, therefore the tissue size after aligning is also smaller, not easily by human eye perception, thus playing the effect improving material stricture of vagina, improve profile pattern and the aesthetics of product.
In the present invention, term " first ", " second ", " the 3rd " only for descriptive purposes, and it is not intended that instruction or hint relative importance; Term " multiple " then refers to two or more, unless otherwise clear and definite restriction. For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
In the description of this specification, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention. In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example. And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. the preparation method of an aluminium alloy electric basin lid, it is characterised in that including:
Milling step: aluminium alloy ingot bar is sequentially carried out hot rolling and cold rolling, obtains inside and has the aluminum alloy plate materials of deformation texture;
Annealing steps: the described aluminum alloy plate materials obtained after rolling is carried out recrystallization annealing;
Battery cover forming step: the described aluminum alloy plate materials that obtains after annealing is processed, decorates and post processing obtains described aluminium alloy electric basin lid.
2. the preparation method of aluminium alloy electric basin lid according to claim 1, it is characterised in that
Described battery cover forming step specifically includes:
Blank forming step: the described aluminum alloy plate materials obtained after annealing is processed, decorates the blank obtaining described aluminium alloy electric basin lid;
Post-processing step: described blank is carried out post processing, obtains described aluminium alloy electric basin lid.
3. the preparation method of aluminium alloy electric basin lid according to claim 2, it is characterised in that
Described post-processing step specifically includes:
Sanding and polishing step: the surface of described blank is carried out grinding process and polishing;
Sandblasting step: the described blank obtained after sanding and polishing is carried out blasting treatment;
First time anodization step: the described blank obtained after blasting treatment is carried out first time anodic oxidation;
Colouring step: the described blank obtained after first time anodic oxidation is carried out colouring process, makes described blank painted;
High light step: the arris of the described blank after painted is carried out high light processing, makes the arris of described blank have mirror effect;
Second time anodization step: the described blank obtained after high light is processed carries out second time anodic oxidation, obtains described aluminium alloy electric basin lid.
4. the preparation method of aluminium alloy electric basin lid according to claim 3, it is characterised in that
In described sanding and polishing step, between polishing direction and the orientation of described deformation texture, there is angle.
5. the preparation method of aluminium alloy electric basin lid according to claim 4, it is characterised in that
Described angle is 90 ��.
6. the preparation method of aluminium alloy electric basin lid according to claim 2, it is characterised in that
Described blank forming step specifically includes:
First time procedure of processing: the described aluminum alloy plate materials obtained after annealing is processed into the roughing part main body corresponding with the roughing size of described aluminium alloy electric basin lid;
Working of plastics decoration step: plastic decorating part is connected in described roughing part main body, obtains the roughing part of described aluminium alloy electric basin lid;
Second time procedure of processing: described roughing part is processed into the blank corresponding with the blank dimension of described aluminium alloy electric basin lid.
7. the preparation method of aluminium alloy electric basin lid according to any one of claim 1 to 6, it is characterised in that also include:
Ingot casting melting step: the ingot casting of raw material or remelting is loaded melting in smelting furnace, obtains aluminium alloy melt;
Ingot bar forming step: described aluminium alloy melt melting obtained pours die for molding into, obtains aluminium alloy ingot bar;
Milling face: side and big face to described aluminium alloy ingot bar carry out the process of milling face.
8. the preparation method of aluminium alloy electric basin lid according to claim 7, it is characterised in that also include:
Homogenize heat treatment step: homogenize heat treatment to the described aluminium alloy ingot bar obtained after the process of milling face.
9. an aluminium alloy electric basin lid, for electronic equipment, it is characterised in that adopt the preparation method of the aluminium alloy electric basin lid as according to any one of the claims 1 to 8 to make.
10. an electronic equipment, it is characterised in that include the aluminium alloy electric basin lid as described in the claims 9.
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| CN106350852A (en) * | 2016-09-22 | 2017-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Magnetic aluminum alloy battery cover, processing method and equipment |
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| CN107717755A (en) * | 2017-11-24 | 2018-02-23 | 无锡市日升机械厂 | The sand-blasting machine of subsidiary grinding wheel auxiliary polishing burr |
| CN107768558A (en) * | 2017-11-30 | 2018-03-06 | 惠州市天翔昌运电子有限公司 | Aluminum alloy battery lid further processing technique and aluminum alloy battery lid |
| CN108420357A (en) * | 2017-02-11 | 2018-08-21 | 马诗瑗 | Filter box of waterless urinal manufactures mounting process |
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| CN107768558A (en) * | 2017-11-30 | 2018-03-06 | 惠州市天翔昌运电子有限公司 | Aluminum alloy battery lid further processing technique and aluminum alloy battery lid |
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