CN112571001B - Aluminum material forming method for power battery cover plate - Google Patents
Aluminum material forming method for power battery cover plate Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000000463 material Substances 0.000 title claims abstract description 53
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000137 annealing Methods 0.000 claims abstract description 88
- 238000003801 milling Methods 0.000 claims abstract description 57
- 238000005096 rolling process Methods 0.000 claims abstract description 53
- 238000005266 casting Methods 0.000 claims abstract description 45
- 239000011888 foil Substances 0.000 claims abstract description 17
- 238000005219 brazing Methods 0.000 claims abstract description 15
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 238000005098 hot rolling Methods 0.000 claims abstract description 9
- 238000004806 packaging method and process Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 42
- 230000001681 protective effect Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010731 rolling oil Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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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- 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
Abstract
The invention relates to an aluminum material forming method for a power battery cover plate, which is characterized by comprising the following steps of: the method comprises the following steps: 1) preparing materials; 2) casting; 3) milling a surface; 4) hot rolling; 5) cold rolling; 6) primary intermediate annealing; 7) cold finish rolling; 8) foil rolling; 9) slitting; 10) secondary intermediate annealing; 11) packaging; the size of the product is ensured to meet the requirement through the rolling processes of hot rolling, cold finish rolling and foil rolling in sequence, and the heat dissipation performance of the product is further improved, so that the heat dissipation function can be effectively realized in the gas shielded brazing process, the brazing quality is further ensured, and the quality of the finished product is further improved; the castings are conveyed into the three-dimensional scanning workshop, a three-dimensional actual model for each casting is generated and is compared with a three-dimensional preset model preset in the center console, so that a subsequent surface milling process is determined according to different comparison results, and the surface milling precision and the surface milling efficiency are further improved.
Description
Technical Field
The invention relates to the technical field of aluminum products, in particular to an aluminum product forming method for a power battery cover plate.
Background
The power battery cover plate is often used as a battery box packaging cover plate, and needs to be in close contact with a power battery which generates heat in the actual working process, so that heat emitted by the battery can be transmitted and absorbed after the cover plate is used for a long time, higher requirements can be provided for material selection and performance of the power battery cover plate, and the cover plate is not in line with aluminum alloy materials corresponding to heat dissipation performance parameters, so that the mounting process after molding is influenced, and the heat dissipation performance after use and the service life of the battery can be influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an aluminum material forming method for a power battery cover plate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an aluminum material forming method for a power battery cover plate is characterized by comprising the following steps: the method comprises the following steps:
1) preparing materials: preparing raw materials for manufacturing the gas-shielded brazing material according to a preset mass ratio, and recording the corresponding mass ratio of each selected component in the material;
2) casting: casting the prepared raw materials into a casting;
3) milling a surface: rough milling and finish milling are carried out on the surface of the casting to remove burrs and particles attached to the surface of the casting:
4) hot rolling: winding the casting after surface milling, and performing hot rolling treatment to form a hot rolled plate;
5) cold rolling: carrying out cold rolling treatment on a hot rolled plate to form a cold rolled plate, and spraying rolling oil in the cold rolling process to lubricate, cool and clean the surface of the plate;
6) primary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
7) cold finish rolling: performing cold finish rolling treatment on the plate, adopting a mode of pressing the plate for multiple times, controlling the pressing amount of each time, and finally enabling the cold deformation amount to be 75-90%;
8) foil rolling: detecting the thickness of the plate subjected to secondary annealing, and when detecting and confirming that the thickness of the plate is within a preset thickness range, rolling the plate for multiple times to produce an aluminum foil coiled material with the required thickness meeting the conditions;
9) slitting: cutting the coiled material after foil rolling into a plurality of sections with required length and width;
10) secondary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
11) packaging: and packaging and warehousing the cut coiled materials with different lengths and widths.
Further, in the step 1), the corresponding mass ratio of each component selected in each burdening is recorded and sent to the center console, the center console simultaneously records the corresponding performance parameters of the gas-shielded brazing material manufactured corresponding to the burdening, and the gas-shielded brazing material is sequenced according to the quality of different corresponding performance parameters.
Further, in the step 2), after casting, the castings are conveyed to a three-dimensional scanning workshop, a three-dimensional actual model for each casting is generated and compared with a three-dimensional preset model preset in the center console, and when the deviation value of the three-dimensional actual model and the three-dimensional preset model is larger than a first preset threshold value, the castings are determined to be unqualified and are conveyed to an unqualified channel; when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a first preset threshold value and larger than a second preset threshold value, the three-dimensional actual model and the three-dimensional preset model are sent to a working table to be subjected to rough milling firstly and finish milling secondly; and when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a second preset threshold value, sending the three-dimensional actual model and the three-dimensional preset model into a workbench for directly carrying out finish milling, wherein the first preset threshold value is higher than the second preset threshold value.
Further, in the step 3), the rotation speed of the milling cutter during rough milling is higher than that during finish milling, and the working time during rough milling is lower than that during finish milling.
Further, in the step 6), the heat preservation temperature of the primary intermediate annealing is 300-450 ℃, the heat preservation time is 0.5-1.0h, the flowing state of the protective gas inside and outside the annealing environment in the primary intermediate annealing process is ensured, the cold and heat exchange is realized, and the primary annealing flow rate in the annealing process is ensured to be larger than the primary annealing flow rate before and after annealing.
Further, in the step 7), a plate is pressed down for multiple times, the pressing amount of each time is controlled to be gradually reduced, and finally, the cold deformation amount is 75% -90%.
Further, in the step 7), a mode of pressing the plate for multiple times is adopted, and the speed of gradually reducing the pressing amount of each time is controlled to be in a linear relation with the times of pressing the plate.
Further, in the step 7), a mode of pressing the plate for multiple times is adopted, and the speed of gradually reducing the pressing amount of each time is controlled to have a nonlinear relation with the times of pressing the plate.
Further, in the step 9), the thickness of the plate subjected to the secondary annealing is detected, and when the thickness of the plate is within a preset thickness range, the rolling frequency, the rolling time, the rolling deformation and the deformation rate of each time are determined according to the absolute value of the difference between the actual thickness and the required thickness.
Further, in the step 10), the heat preservation temperature of the secondary intermediate annealing is 300-.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention provides an aluminum material forming method for a power battery cover plate, which ensures that the size of a product meets the requirement through the rolling processes of hot rolling, cold finish rolling and foil rolling in sequence, and further improves the heat dissipation performance of the product, so that the heat dissipation function can be effectively realized in the gas shielded brazing process, the brazing quality is further ensured, and the quality of a finished product is further improved.
2) The invention provides an aluminum material forming method for a power battery cover plate, which is characterized in that castings are conveyed into a three-dimensional scanning workshop to generate a three-dimensional actual model for each casting, and the three-dimensional actual model is compared with a three-dimensional preset model preset in a center console, so that a subsequent surface milling process is determined according to different comparison results, and the surface milling precision and the surface milling efficiency are further improved.
3) The invention provides an aluminum material forming method for a power battery cover plate, which determines rolling times, rolling time, rolling deformation and deformation rate according to the absolute value of the difference value between the actual thickness and the required thickness in the foil rolling process, thereby determining specific foil rolling contents according to different thicknesses, ensuring foil rolling precision, accelerating foil rolling speed and improving foil rolling efficiency.
4) The invention provides an aluminum material forming method for a power battery cover plate, which is characterized in that protective gas is introduced in the primary intermediate annealing and the secondary intermediate annealing, the annealing process is realized in a protective gas environment, so that the unexpected oxidation and the annealing stability are avoided, meanwhile, the constant temperature in the protective gas environment is ensured through the heat exchange between the inside and the outside of the protective gas environment, the goods returning efficiency and the stability are improved, meanwhile, the annealing flow rate in the annealing process is higher than the annealing flow rates before and after annealing, so that the protective gas is stably discharged before and after annealing, and the annealing flow rate in the secondary annealing is relatively low due to the primary annealing, so that the product performance is stabilized.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The aluminum material forming method for the power battery cover plate, which is provided by the application and shown in fig. 1, comprises the following steps:
an aluminum material forming method for a power battery cover plate is characterized by comprising the following steps: the method comprises the following steps:
1) preparing materials: preparing raw materials for manufacturing the gas-shielded brazing material according to a preset mass ratio, and recording the corresponding mass ratio of each selected component in the material preparation; preferably, the raw materials comprise elements for increasing brazing rupture and molten metal fluidity;
2) casting: casting the prepared raw materials into a casting;
3) milling a surface: rough milling and finish milling are carried out on the surface of the casting to remove burrs and particles attached to the surface of the casting:
4) hot rolling: winding the casting after surface milling, and performing hot rolling treatment to form a hot rolled plate;
5) cold rolling: performing cold rolling treatment on a hot rolled plate to form a cold rolled plate, and spraying rolling oil in the cold rolling process to lubricate, cool and clean the surface of the plate;
6) primary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
7) cold finish rolling: performing cold finish rolling treatment on the plate, adopting a mode of pressing the plate for multiple times, controlling the pressing amount of each time, and finally enabling the cold deformation amount to be 75-90%;
8) foil rolling: detecting the thickness of the plate subjected to secondary annealing, and when detecting and confirming that the thickness of the plate is within a preset thickness range, rolling the plate for multiple times to produce an aluminum foil coiled material with the required thickness meeting the conditions;
9) slitting: cutting the coiled material after foil rolling into a plurality of sections with required length and width;
10) secondary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
11) and (3) packaging: and packaging and warehousing the cut coiled materials with different lengths and widths.
Specifically, in the step 1), the corresponding mass ratio records of the components selected in each batching are sent to the central console, the central console simultaneously records the corresponding performance parameters of the gas-shielded brazing material manufactured corresponding to the batching, and the gas-shielded brazing material is sequenced according to the quality of different corresponding performance parameters, so that a user can conveniently read the gas-shielded brazing material in the next use, and the batching type and the mass ratio of the gas-shielded brazing material can be selected according to the different corresponding performance parameters of actual demands.
Specifically, in the step 2), the castings are conveyed into a stereo scanning workshop after being cast, a stereo actual model for each casting is generated, and the stereo actual model is compared with a stereo preset model preset inside the center console: and during comparison, the sizes on the uniform surface are preferentially compared, the sizes on the non-uniform surface are compared, the plates are divided according to different positions on the center console display device for comparison, and the deviation values are displayed in sequence according to the deviation sizes.
When the deviation value of the three-dimensional actual model and the three-dimensional preset model is larger than a first preset threshold value, determining that the casting is unqualified, and sending the casting into an unqualified channel; the first preset threshold is used for judging whether the deviation of the casting is qualified, and when the deviation value of the three-dimensional actual model and the three-dimensional preset model is larger than the first preset threshold, the shape correction cannot be realized by means of face milling, so that the casting needs to be sent into a unqualified channel; preferably, the castings sent into the unqualified channels are sequentially subjected to shape correction detection and unqualified detection, when the shape correction detection is passed, the castings are subjected to shape correction and are reused, and when the shape correction detection is not passed, the castings are subjected to unqualified detection to determine unqualified reasons so as to correct the preparation method and the forming process;
when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a first preset threshold value and larger than a second preset threshold value, the three-dimensional actual model and the three-dimensional preset model are sent to a working table to be subjected to rough milling firstly and finish milling secondly; the second preset threshold is used for judging whether the casting needs rough milling or not, so that unnecessary rough milling steps are omitted according to the detection result, and the milling efficiency is further optimized;
when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a second preset threshold value, sending the three-dimensional actual model into a workbench for directly carrying out finish milling, wherein the first preset threshold value is higher than the second preset threshold value; at the moment, the casting is judged to be not required to be roughly milled, so that the casting can be directly subjected to finish milling operation, the unnecessary rough milling operation is further avoided, and the surface milling efficiency is further optimized.
Specifically, in step 3), the rotation speed of the milling cutter during rough milling is higher than that during finish milling, the working time during rough milling is shorter than that during finish milling, the amount of cutting deformation during rough milling is large, and therefore the rotation speed of the milling cutter during rough milling needs to be set to be higher than that during finish milling, and the rotation speed during finish milling needs to be set to be lower than that during finish milling due to more finish milling points, less error is required, and the rotation speed is low.
Specifically, in the step 6), the heat preservation temperature of the primary intermediate annealing is 300-; through letting in protective gas in an intermediate annealing process, realize annealing process in the protective gas environment to it is stable to avoid unexpected oxidation and annealing, simultaneously through the inside and outside cold and hot exchange of protective gas environment, in order to guarantee the inside constant temperature of protective gas environment, improves goods returning efficiency and stability, sets up the annealing velocity of flow among the annealing process simultaneously and is higher than before the annealing, the stable discharge of protective gas around the annealing is helped to the annealing velocity of flow after.
Specifically, in the step 7), a mode of pressing down the plate for multiple times is adopted, the amount of pressing down each time is controlled to be gradually reduced, the cold deformation amount is finally 75% -90%, the preset range is ensured to be reached during pressing down in the early stage, and the continuous correction and shape correction processes are realized during pressing down in the later stage, so that the pressing down mode needs to be set to control the amount of pressing down each time to be gradually reduced.
Specifically, in the step 7), a mode of pressing the plate for multiple times is adopted, the speed of gradually reducing the pressing amount each time is controlled to be in a linear relation with the times of pressing the plate, the setting mode facilitates the adjustment of the pressing amount, the speed of gradually reducing the pressing amount each time can be determined to be a certain value according to the times of pressing the plate, and the fixed value of the speed of gradually reducing the pressing amount each time is corrected and adjusted according to the later performance detection result so as to further realize process optimization.
Specifically, in the step 7), a mode of pressing down the plate for multiple times is adopted, the speed of gradually reducing the pressing amount at each time is controlled to be in a nonlinear relation with the times of pressing down the plate, the setting mode enables the adjustment of the pressing amount to be attached to the actual deformation process, and because the deformation process of the plate is often nonlinear in the plate pressing process, the initial deformation is large, but the later deformation tends to be in a nonlinear reduction trend, and the pressing amount is difficult to reduce in the later period, the speed of gradually reducing the pressing amount at each time and the times of pressing down the plate are controlled to be in a nonlinear relation and are closer to the actual deformation condition, so that the improvement and optimization of the production process are facilitated.
Specifically, in the step 9), the thickness of the plate subjected to secondary annealing is detected, and when the thickness of the plate is within a preset thickness range, the rolling frequency, the rolling time, the rolling deformation and the deformation rate of each time are determined according to the absolute value of the difference between the actual thickness and the required thickness; the larger the absolute value of the difference between the actual thickness and the required thickness is, the larger the relative setting of the rolling times, the rolling time, the rolling deformation amount and the deformation rate at each time is to meet the rolling requirement, and the smaller the absolute value of the difference between the actual thickness and the required thickness is, the smaller the relative setting of the rolling times, the rolling time, the rolling deformation amount and the deformation rate at each time is to meet the rolling requirement; in order to improve the rolling precision, more rolling times, longer rolling time, and lower rolling deformation and deformation rate per pass can be set to meet the requirements on rolling precision and performance.
Specifically, in the step 10), the heat preservation temperature of the secondary intermediate annealing is 300-; through letting in protective gas in the in-process of secondary intermediate annealing, realize annealing process in the protective gas environment, thereby avoid unexpected oxidation and annealing stable, simultaneously through the inside and outside cold and hot exchange of protective gas environment, in order to guarantee the inside constant temperature of protective gas environment, improve goods returning efficiency and stability, it is higher than before annealing to set up the annealing velocity of flow in the annealing process simultaneously, the annealing velocity of flow after, helps the stable discharge of protective gas before annealing, because once having annealed so the annealing velocity of flow when the secondary annealing sets up relatively lowly in order to stabilize product property ability.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. An aluminum material forming method for a power battery cover plate is characterized by comprising the following steps: the method comprises the following steps:
1) preparing materials: preparing raw materials for manufacturing the gas-shielded brazing material according to a preset mass ratio, and recording the corresponding mass ratio of each selected component in the material;
recording and sending the corresponding mass ratio of each component selected in each burdening to a central console in the step 1), simultaneously recording corresponding performance parameters of the gas-shielded brazing material prepared corresponding to the burdening by the central console, and sequencing according to the quality of different corresponding performance parameters;
2) casting: casting the prepared raw materials into a casting;
in the step 2), the castings are conveyed into a three-dimensional scanning workshop after being cast, a three-dimensional actual model for each casting is generated and is compared with a three-dimensional preset model preset in the center console,
when the deviation value of the three-dimensional actual model and the three-dimensional preset model is larger than a first preset threshold value, determining that the casting is unqualified, and sending the casting into an unqualified channel;
the castings sent into the unqualified channels need to be subjected to shape correction detection and unqualified detection in sequence, the castings are subjected to shape correction and are reused after the shape correction detection is passed, and the castings are subjected to unqualified detection after the shape correction detection is not passed so as to determine unqualified reasons and correct the preparation method and the forming process;
when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a first preset threshold value and larger than a second preset threshold value, the three-dimensional actual model and the three-dimensional preset model are sent to a workbench to be subjected to rough milling and finish milling;
when the deviation value of the three-dimensional actual model and the three-dimensional preset model is smaller than a second preset threshold value, sending the three-dimensional actual model into a workbench for directly carrying out finish milling, wherein the first preset threshold value is higher than the second preset threshold value;
3) milling a surface: carrying out rough milling and finish milling on the surface of the casting to remove burrs and particles attached to the surface of the casting;
4) hot rolling: winding the cast after surface milling, and then carrying out hot rolling treatment to form a hot rolled plate;
5) cold rolling: performing cold rolling treatment on a hot rolled plate to form a cold rolled plate, and spraying rolling oil in the cold rolling process to lubricate, cool and clean the surface of the plate;
6) primary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
7) cold finish rolling: performing cold finish rolling treatment on the plate, adopting a mode of pressing the plate for multiple times, controlling the pressing amount of each time, and finally enabling the cold deformation amount to be 75-90%;
8) foil rolling: detecting the thickness of the plate subjected to secondary annealing, and when detecting and confirming that the thickness of the plate is within a preset thickness range, rolling the plate for multiple times to produce an aluminum foil coiled material with the required thickness meeting the conditions;
9) slitting: cutting the coiled material after foil rolling into a plurality of sections with required length and width;
10) secondary intermediate annealing: annealing the cold-rolled sheet in an environment where protective gas is introduced and flows at a primary annealing flow rate;
11) packaging: and packaging and warehousing the cut coiled materials with different lengths and widths.
2. The aluminum material forming method for the power battery cover plate as claimed in claim 1, wherein the aluminum material forming method comprises the following steps: in the step 3), the rotation speed of the milling cutter during rough milling is higher than that during finish milling, and the working time during rough milling is lower than that during finish milling.
3. The aluminum material forming method for the power battery cover plate as claimed in claim 1, wherein the aluminum material forming method comprises the following steps: in the step 6), the heat preservation temperature of the primary intermediate annealing is 300-450 ℃, the heat preservation time is 0.5-1.0h, the flowing state of protective gas inside and outside the annealing environment in the primary intermediate annealing process is ensured, the cold and heat exchange is realized, and the primary annealing flow rate in the annealing process is ensured to be larger than the primary annealing flow rate before and after annealing.
4. The aluminum material forming method for the power battery cover plate as claimed in claim 1, wherein the aluminum material forming method comprises the following steps: in the step 7), a mode of pressing the plate for multiple times is adopted, the pressing amount of each time is controlled to be gradually reduced, and finally the cold deformation amount is 75% -90%.
5. The aluminum material forming method for the power battery cover plate as claimed in claim 4, wherein the aluminum material forming method comprises the following steps: in the step 7), a mode of pressing the plate for multiple times is adopted, and the speed of gradually reducing the pressing amount each time is controlled to be in a linear relation with the times of pressing the plate.
6. The aluminum material forming method for the power battery cover plate as claimed in claim 4, wherein the aluminum material forming method comprises the following steps: in the step 7), a mode of pressing the plate for multiple times is adopted, and the speed of gradually reducing the pressing amount of each time is controlled to be in a nonlinear relation with the times of pressing the plate.
7. The aluminum material forming method for the power battery cover plate as claimed in claim 1, wherein the aluminum material forming method comprises the following steps: and 9), detecting the thickness of the plate subjected to secondary annealing, and determining the rolling times, the rolling time, the rolling deformation and the deformation rate according to the absolute value of the difference between the actual thickness and the required thickness when the thickness of the plate is within a preset thickness range.
8. The aluminum material forming method for the power battery cover plate as claimed in claim 3, wherein the aluminum material forming method comprises the following steps: in the step 10), the heat preservation temperature of the secondary intermediate annealing is 300-400 ℃, the heat preservation time is 0.5-1.0h, the flowing state of protective gas inside and outside the annealing environment in the secondary intermediate annealing process is ensured, the cold and heat exchange is realized, the secondary annealing flow rate in the annealing process is ensured to be larger than the secondary annealing flow rate before and after annealing, the secondary annealing flow rate in the annealing process is lower than the primary annealing flow rate in the annealing process, and the secondary annealing flow rate before and after annealing is lower than the primary annealing flow rate before and after annealing.
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Denomination of invention: An Aluminum Forming Method for Power Battery Cover Plate Effective date of registration: 20231102 Granted publication date: 20220906 Pledgee: Agricultural Bank of China Limited Zhenjiang Dantu sub branch Pledgor: ZHENJIANG LONGYUAN ALUMINUM Co.,Ltd. Registration number: Y2023980063519 |
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