CN113118216A - Rolling method of aluminum/magnesium/aluminum laminated composite plate with large thickness ratio - Google Patents
Rolling method of aluminum/magnesium/aluminum laminated composite plate with large thickness ratio Download PDFInfo
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- CN113118216A CN113118216A CN202110407476.7A CN202110407476A CN113118216A CN 113118216 A CN113118216 A CN 113118216A CN 202110407476 A CN202110407476 A CN 202110407476A CN 113118216 A CN113118216 A CN 113118216A
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- aluminum strip
- aluminum
- magnesium alloy
- alloy plate
- rolling
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 329
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 329
- 238000005096 rolling process Methods 0.000 title claims abstract description 100
- 239000011777 magnesium Substances 0.000 title claims abstract description 36
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 131
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000004381 surface treatment Methods 0.000 claims abstract description 18
- 238000010008 shearing Methods 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 229910003023 Mg-Al Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0064—Uncoiling the rolled product
Abstract
The invention belongs to the technical field of metal laminated composite plate preparation, and particularly relates to a rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio, which comprises the following steps: s1, preparing an upper aluminum strip, a lower aluminum strip and a magnesium alloy plate to be compounded; s2, performing surface treatment on the magnesium alloy plate to be compounded; s3, riveting the aluminum strip/the magnesium alloy plate/the aluminum strip; s4, rolling the riveted aluminum strip/magnesium alloy plate/aluminum strip; s5, heating an upper aluminum strip and a lower aluminum strip in the rolled aluminum strip/magnesium alloy plate/aluminum strip; s6, rolling the heated aluminum strip/magnesium alloy plate/aluminum strip; and S7, shearing the rolled aluminum strip/magnesium alloy plate/aluminum strip to obtain the qualified aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio. The invention has simple structure, convenient operation, low manufacturing cost and high production efficiency, and realizes the continuous preparation of the aluminum/magnesium/aluminum laminated composite board with high thickness ratio, good plate shape and stable performance.
Description
Technical Field
The invention belongs to the technical field of metal laminated composite plate preparation, and particularly relates to a rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio.
Background
The magnesium alloy has the characteristics of light weight, high specific strength, high specific stiffness, good electromagnetic shielding performance and the like, and is widely applied to the fields of automobiles, aerospace and the like, but the wide application of the magnesium alloy is limited due to the characteristic of poor corrosion resistance, the aluminum has good plasticity, can form a compact oxide film, has excellent corrosion resistance, and the aluminum/magnesium/aluminum laminated plate has the advantages of the magnesium alloy and the aluminum and is widely applied to the fields of automobiles, aerospace and the like. With the increasing requirements for light weight in the fields of automobiles, aerospace and the like, the aluminum/magnesium/aluminum laminated plate with the large thickness ratio has lower density than the aluminum/magnesium/aluminum laminated plate with the common thickness ratio, has the advantages of the aluminum/magnesium/aluminum laminated plate with the common thickness ratio, and can be widely applied.
At present, the aluminum/magnesium/aluminum laminated plate with the large thickness ratio is mainly prepared by a rolling compounding method, but because the upper aluminum layer and the lower aluminum layer are thinner, the problems of wave shape, poor surface quality, uneven plate thickness and the like easily occur in the rolling process.
Disclosure of Invention
The invention aims to solve the technical problems that the upper aluminum layer and the lower aluminum layer are easy to generate wave shape, the plate shape of the plate is poor, the surface quality is poor and the plate thickness is not uniform in the rolling process of the aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio. Therefore, the invention provides a rolling method of the aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio comprises the following steps:
s1, preparing an upper aluminum strip, a lower aluminum strip and a magnesium alloy plate to be compounded;
s2, performing surface treatment on the magnesium alloy plate to be compounded;
s3, placing an upper aluminum strip to be compounded on an upper unreeling machine, placing a lower aluminum strip to be compounded on a lower unreeling machine, placing the initial positions of the heads of the upper aluminum strip and the lower aluminum strip to be compounded at the riveting position of an automatic riveting machine, placing a magnesium alloy plate subjected to surface treatment between the upper aluminum strip and the lower aluminum strip to be compounded, and riveting the upper aluminum strip to be compounded, the magnesium alloy plate subjected to surface treatment and the lower aluminum strip to be compounded through the automatic riveting machine to obtain an aluminum strip/magnesium alloy plate/aluminum strip;
s4, rolling the riveted aluminum strip/magnesium alloy plate/aluminum strip;
s5, heating an upper aluminum strip and a lower aluminum strip in the rolled aluminum strip/magnesium alloy plate/aluminum strip;
s6, rolling the heated aluminum strip/magnesium alloy plate/aluminum strip;
and S7, shearing the rolled aluminum strip/magnesium alloy plate/aluminum strip to obtain the qualified aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio.
Further, in the step S1, the upper aluminum strip and the lower aluminum strip to be composited are any one of industrial pure aluminum, 3 series aluminum alloy, 5 series aluminum alloy, and 6 series aluminum alloy, and the magnesium alloy plate to be composited is any one of Mg — Al series magnesium alloy.
Further, in the step S1, the length, the width, and the thickness of the upper aluminum strip to be composited and the lower aluminum strip to be composited are the same, the thickness of the upper aluminum strip to be composited is 0.2mm to 1mm, the width of the magnesium alloy plate to be composited and the width of the upper aluminum strip to be composited are the same, the thickness of the magnesium alloy plate to be composited is 4mm to 20mm, and the thickness ratio of the upper aluminum strip to be composited, the magnesium alloy plate to be composited, and the lower aluminum strip to be composited is greater than or equal to 1:10: 1.
Further, the step S2 is a specific operation of performing the surface treatment on the magnesium alloy plate: polishing the surface of the magnesium alloy plate until the roughness of the surface of the magnesium alloy plate is Ra 25-Ra 200, cleaning oil stains and an oxidation film on the surface of the magnesium alloy plate by using acetone and alcohol, standing and drying the magnesium alloy plate, and heating the magnesium alloy plate by using a vacuum heating furnace at the temperature of 300-450 ℃ for 10-60 min.
Further, in the step S3, the magnesium alloy plate is pushed into the space between the upper aluminum strip to be combined and the lower aluminum strip to be combined by the boosting hydraulic cylinder and is sent into the automatic riveting machine for riveting, a positioning support roller is arranged between the boosting hydraulic cylinder and the automatic riveting machine and is used for stabilizing, supporting and positioning the upper aluminum strip and the lower aluminum strip to be combined, an upper roller of the positioning support roller is higher than the riveting position of the upper aluminum strip of the automatic riveting machine, and a lower roller of the positioning support roller is lower than the riveting position of the lower aluminum strip of the automatic riveting machine.
Furthermore, the pushing speed of the boosting hydraulic cylinder to the plate can be adjusted to adapt to different rolling working conditions, and the pushing speed of the boosting hydraulic cylinder is the same as the unreeling speed of the upper unreeling machine and the unreeling speed of the lower unreeling machine and is smaller than the rolling speed of the rolling mill.
Further, the step S4 is to roll the riveted aluminum strip/magnesium alloy plate/aluminum strip, specifically: pushing the aluminum strip/magnesium alloy plate/aluminum strip obtained by riveting to an adjustable press roller by a boosting hydraulic cylinder, adjusting the positions of upper and lower rollers of the adjustable press roller by utilizing a pressing and pressing device of the adjustable press roller, rolling the aluminum strip/magnesium alloy plate/aluminum strip obtained by riveting, wherein the distance between the upper and lower rollers of the adjustable press roller is consistent with the total thickness of the aluminum strip/magnesium alloy plate/aluminum strip obtained by riveting, and the adjusting range of the adjustable press roller is 0-25 mm.
Further, the step S5 of heating the rolled aluminum strip/magnesium alloy plate/aluminum strip includes the following specific steps: and (3) feeding the rolled aluminum strip/magnesium alloy plate/aluminum strip into a flat plate type induction heating device for heating, wherein the heating temperature of the flat plate type induction heating device is 300-450 ℃, and the heating time is 5-30 min.
Further, the step S6 of rolling the heated aluminum strip/magnesium alloy plate/aluminum strip specifically includes: feeding the heated aluminum strip/magnesium alloy plate/aluminum strip into a rolling mill for rolling, after the rolling is started, retracting a boosting hydraulic cylinder, adjusting the unwinding speed of an upper unwinding machine and a lower unwinding machine, so that the unwinding speed of the upper unwinding machine and the lower unwinding machine is smaller than the rolling speed of the rolling mill, the amplitude of the unwinding speed is 1% -5%, forming certain tension on the upper aluminum strip and the lower aluminum strip to be compounded, the rolling direction of the rolling mill is the same as the unwinding direction of the upper unwinding machine and the lower unwinding machine, and the rolling reduction of the aluminum strip/magnesium alloy plate/aluminum strip is 20% -65%.
Further, the center lines of the aluminum strip/magnesium alloy plate/aluminum strip passing through the positioning support roll, the automatic riveting machine, the adjustable press roll and the rolling mill are strictly maintained on a straight line.
And further, shearing the connected part of the rolled aluminum strip/magnesium alloy plate/aluminum strip and the un-compounded aluminum strip by using a plate shearing machine to obtain the qualified aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio.
Compared with the prior art, the invention has the following advantages:
1. the invention utilizes the speed difference between the upper unreeling machine and the lower unreeling machine and the rolling mill to generate certain tension to the upper aluminum strip and the lower aluminum strip, and simultaneously adopts the rolling mill to roll the aluminum/magnesium/aluminum layered composite board with large thickness ratio, thereby having low manufacturing cost and high production efficiency and realizing the continuous preparation of the aluminum/magnesium/aluminum layered composite board with large thickness ratio;
2. the invention adopts the strip tension rolling, the adjustable press roll and the flat plate type induction heating device, effectively solves the problems that the upper and lower thin aluminum layers are easy to generate wave shapes, the rolled plate thickness is different and the product quality is poor in the rolling process of the aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio, promotes the coordinated deformation of the magnesium alloy plate and the aluminum strip with the large thickness ratio, and can prepare the aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio, good plate shape and stable performance.
Drawings
FIG. 1 is a flow chart of the rolling method of the present invention;
FIG. 2 is a schematic view of the aluminum/magnesium/aluminum laminated composite board with a large thickness ratio prepared by the present invention;
in the figure: the method comprises the following steps of 1-boosting hydraulic cylinder, 2-magnesium alloy plate, 3-upper unreeling machine, 4-to-be-composited upper aluminum strip, 5-positioning support roller, 6-automatic riveting machine, 7-adjustable press roller, 8-flat plate type induction heating device, 9-rolling mill, 10-plate shearing machine, 11-outlet roller table, 12-inlet roller table, 13-to-be-composited lower aluminum strip, 14-lower unreeling machine and 15-large thickness ratio aluminum/magnesium/aluminum laminated plate.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
A rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio comprises the following steps:
s1, preparing an upper aluminum strip 4 and a lower aluminum strip 13 to be compounded, which are made of 1060, and have the length, the width and the height of 5000mm, 400mm and 0.2mm, and preparing a magnesium alloy plate 2 to be compounded, which is made of AZ31B, and has the length, the width and the height of 500mm, 400mm and 4 mm;
s2, surface treatment is carried out on the AZ31B magnesium alloy plate 2: polishing the surface of the AZ31B magnesium alloy plate 2 until the roughness of the surface of the AZ31B magnesium alloy plate 2 is Ra25, cleaning oil stains and an oxidation film on the surface of the AZ31B magnesium alloy plate 2 by using acetone and alcohol, standing and drying the magnesium alloy plate 2, and heating the AZ31B magnesium alloy plate 2 by using a vacuum heating furnace at the heating temperature of 300 ℃ for 10 min;
s3, placing an upper aluminum strip 4 to be compounded on an upper unreeling machine 3, placing a lower aluminum strip 13 to be compounded on a lower unreeling machine 14, placing the initial head position of the upper aluminum strip 4 to be compounded and the lower aluminum strip 1060 to be compounded 13 at the riveting position of an automatic riveting machine 6, placing an AZ31B magnesium alloy plate 2 subjected to surface treatment between the upper aluminum strip 1060 to be compounded and the lower aluminum strip 13 to be compounded, pushing the AZ31B magnesium alloy plate 2 into the space between the upper aluminum strip 4 to be compounded and the lower aluminum strip 1060 to be compounded by a boosting hydraulic cylinder 1, wherein the pushing speed of the boosting hydraulic cylinder 1 can be adjusted, and then riveting the upper aluminum strip 4 to be compounded, the AZ31B magnesium alloy plate 2 subjected to surface treatment and the lower aluminum strip 13 to be compounded by the automatic riveting machine 6 to obtain a 1060 aluminum strip/AZ 31B magnesium alloy plate/aluminum strip; a positioning support roller 5 is arranged between the boosting hydraulic cylinder 1 and the automatic riveting machine 6, the positioning support roller 5 is used for stabilizing, supporting and positioning an aluminum strip 4 on 1060 and an aluminum strip 13 under 1060 to be compounded, the upper roller of the positioning support roller 5 is higher than the riveting position of the aluminum strip 4 on 1060 of the automatic riveting machine 6, and the lower roller of the positioning support roller 5 is lower than the riveting position of the aluminum strip 13 under 1060 of the automatic riveting machine 6;
s4, rolling the 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip obtained by riveting: the 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip obtained through riveting is pushed to an adjustable pressing roller 7 by a boosting hydraulic cylinder 1 for rolling, the distance between an upper roller and a lower roller of the adjustable pressing roller 7 is 4.4mm, and the pushing speed of the boosting hydraulic cylinder 1 is the same as the unreeling speed of an upper unreeling machine 3 and an unreeling machine 14;
s5, heating an aluminum strip 4 on 1060 and an aluminum strip 13 on 1060 in the rolled 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip: feeding the rolled 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip into a flat plate type induction heating device 8 for heating, wherein the heating temperature of the flat plate type induction heating device 8 is 300 ℃, and the heating time is 5 min;
s6, rolling the heated 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip: feeding the heated 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip into a rolling mill 9 for rolling, retracting a boosting hydraulic cylinder 1 after the rolling is started, adjusting the unwinding speed of an upper unwinding machine 3 and an unwinding machine 14 to be 0.19mm/s, adjusting the rolling speed of the rolling mill 9 to be 0.2mm/s, forming certain tension on the 1060 upper aluminum strip and the 1060 lower aluminum strip to be compounded, wherein the rolling direction of the rolling mill 9 is the same as the unwinding direction of the upper unwinding machine 3 and the unwinding machine 14, and the rolling reduction of the 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip is 0.88 mm;
s7, shearing the 1060 aluminum strip/AZ 31B magnesium alloy plate/1060 aluminum strip after rolling to obtain the qualified 1060/AZ31B/1060 laminated composite plate 15 with the large thickness ratio.
Example 2
A rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio comprises the following steps:
s1, preparing an upper aluminum strip 4 and a lower aluminum strip 13 to be compounded, which are 5052 in material quality, 6000mm × 300mm × 0.5mm in length × width × height, and preparing a magnesium alloy plate 2 to be compounded, which is AZ31 in material quality, 600mm × 300mm × 5mm in length × width × height;
s2, surface treatment is carried out on the AZ31 magnesium alloy plate 2: polishing the surface of an AZ31 magnesium alloy plate 2 until the roughness of the surface of the AZ31 magnesium alloy plate 2 is Ra100, cleaning oil stains and an oxidation film on the surface of the AZ31 magnesium alloy plate 2 by using acetone and alcohol, standing and drying the magnesium alloy plate, and heating the AZ31 magnesium alloy plate 2 by using a vacuum heating furnace at the heating temperature of 400 ℃ for 30 min;
s3, placing an upper 5052 aluminum strip 4 to be compounded on an upper unreeling machine 3, placing a lower 5052 aluminum strip 13 to be compounded on a lower unreeling machine 14, placing the initial head positions of the upper 5052 aluminum strip 4 and the lower 5052 aluminum strip 13 to be compounded on the riveting position of an automatic riveting machine 6, placing an AZ31 magnesium alloy plate 2 after surface treatment between the upper 5052 aluminum strip 4 and the lower 5052 aluminum strip 13 to be compounded, pushing the AZ31 magnesium alloy plate 2 into the space between the upper 5052 aluminum strip 4 to be compounded and the lower 5052 aluminum strip 13 to be compounded through a boosting hydraulic cylinder 1, wherein the pushing speed of the boosting hydraulic cylinder 1 can be adjusted, and then riveting the upper 5052 aluminum strip 4 to be compounded, the AZ31 magnesium alloy plate 2 after surface treatment and the lower 5052 aluminum strip 13 to be compounded through the automatic riveting machine 6 to obtain a 5052 aluminum strip/AZ 31 magnesium alloy plate/AZ 2 aluminum strip; a positioning support roll 5 is arranged between the boosting hydraulic cylinder 1 and the automatic riveting machine 6, the positioning support roll 5 is used for stabilizing, supporting and positioning an upper aluminum strip 4 of 5052 and a lower aluminum strip 13 of 5052 to be compounded, an upper roll of the positioning support roll 5 is higher than the riveting position of the upper aluminum strip 4 of 5052 of the automatic riveting machine 6, and a lower roll of the positioning support roll 5 is lower than the riveting position of the lower aluminum strip 13 of 5052 of the automatic riveting machine 6;
s4, rolling the 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip obtained by riveting: the 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip obtained through riveting is pushed to an adjustable pressing roller 7 by a boosting hydraulic cylinder 1 for rolling, the distance between an upper roller and a lower roller of the adjustable pressing roller 7 is 6mm, and the pushing speed of the boosting hydraulic cylinder 1 is the same as the unreeling speed of an upper unreeling machine 3 and an unreeling machine 14;
s5, 5052 upper aluminum strip 4 and 5052 lower aluminum strip 13 in the rolled 5052 aluminum strip/AZ 31 magnesium alloy sheet/5052 aluminum strip are heated: feeding rolled 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip into a flat plate type induction heating device 8 for heating, wherein the heating temperature of the flat plate type induction heating device 8 is 400 ℃, and the heating time is 20 min;
s6, rolling the heated 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip: sending the heated 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip into a rolling mill 9 for rolling, retracting a boosting hydraulic cylinder 1 after rolling is started, adjusting the unwinding speed of an upper unwinding machine 3 and an unwinding machine 14 to be 0.099mm/s, adjusting the rolling speed of the rolling mill 9 to be 0.1mm/s, forming certain tension on an upper aluminum strip of 5052 and a lower aluminum strip of 5052 to be compounded, wherein the rolling direction of the rolling mill 9 is the same as the unwinding direction of the upper unwinding machine 3 and the lower unwinding machine 14, and the reduction of the 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip is 2.4 mm;
s7, shearing the rolled 5052 aluminum strip/AZ 31 magnesium alloy plate/5052 aluminum strip to obtain the qualified 5052/AZ31/5052 layered composite plate 15 with the large thickness ratio.
Example 3
A rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio comprises the following steps:
s1, preparing an upper aluminum strip 4 and a lower aluminum strip 13 to be compounded, which are made of 3003 and have the length, the width and the height of 10000mm, 600mm and 1mm, and preparing a magnesium alloy plate 2 to be compounded, which is made of AZ61 and has the length, the width and the height of 800mm, 600mm and 20 mm;
s2, surface treatment is carried out on the AZ61 magnesium alloy plate 2: polishing the surface of an AZ61 magnesium alloy plate 2 until the roughness of the surface of the AZ61 magnesium alloy plate 2 is Ra200, cleaning oil stains and an oxidation film on the surface of the AZ61 magnesium alloy plate 2 by using acetone and alcohol, standing and drying the magnesium alloy plate, and heating the AZ61 magnesium alloy plate 2 by using a vacuum heating furnace at the temperature of 450 ℃ for 60 min;
s3, placing the 3003 upper aluminum strip 4 to be compounded on an upper unreeling machine 3, placing the 3003 lower aluminum strip 13 to be compounded on a lower unreeling machine 14, placing the initial head positions of the 3003 upper aluminum strip 4 and the 3003 lower aluminum strip 13 to be compounded on the riveting position of an automatic riveting machine 6, placing the AZ61 magnesium alloy plate 2 after surface treatment between the 3003 upper aluminum strip 4 and the 3003 lower aluminum strip 13 to be compounded, pushing the AZ61 magnesium alloy plate 2 into the space between the 3003 upper aluminum strip 4 to be compounded and the 3003 lower aluminum strip 13 to be compounded through a boosting hydraulic cylinder 1, wherein the pushing speed of the boosting hydraulic cylinder 1 can be adjusted, and then riveting the 3003 upper aluminum strip 4 to be compounded, the AZ61 magnesium alloy plate 2 after surface treatment and the 3003 lower aluminum strip 13 to be compounded through the automatic riveting machine 6 to obtain the 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip; a positioning support roller 5 is arranged between the boosting hydraulic cylinder 1 and the automatic riveting machine 6, the positioning support roller 5 is used for stabilizing, supporting and positioning an upper aluminum strip 4 of 3003 and a lower aluminum strip 13 of 3003 to be compounded, an upper roller of the positioning support roller 5 is higher than the riveting position of the upper aluminum strip 4 of 3003 of the automatic riveting machine 6, and a lower roller of the positioning support roller 5 is lower than the riveting position of the lower aluminum strip 13 of 3003 of the automatic riveting machine 6;
s4, rolling the riveted 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip: the 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip obtained by riveting is pushed to an adjustable pressing roller 7 by a boosting hydraulic cylinder 1 for rolling, the distance between an upper roller and a lower roller of the adjustable pressing roller 7 is 22mm, and the pushing speed of the boosting hydraulic cylinder 1 is the same as the unreeling speed of an upper unreeling machine 3 and an unreeling machine 14;
s5, heating the 3003 upper aluminum strip 4 and the 3003 lower aluminum strip 13 in the rolled 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip: feeding the rolled 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip into a flat plate type induction heating device 8 for heating, wherein the heating temperature of the flat plate type induction heating device 8 is 450 ℃, and the heating time is 30 min;
s6, rolling the heated 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip: feeding the heated 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip into a rolling mill 9 for rolling, retracting a boosting hydraulic cylinder 1 after the rolling is started, adjusting the unwinding speed of an upper unwinding machine 3 and an lower unwinding machine 14 to be 0.145mm/s, adjusting the rolling speed of the rolling mill 9 to be 0.15mm/s, forming certain tension on the 3003 upper aluminum strip and the 3003 lower aluminum strip to be compounded, wherein the rolling direction of the rolling mill 9 is the same as the unwinding direction of the upper unwinding machine 3 and the lower unwinding machine 14, and the rolling reduction of the 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip is 14.3 mm;
s7, shearing the rolled 3003 aluminum strip/AZ 61 magnesium alloy plate/3003 aluminum strip to obtain the qualified 5052/AZ61/5052 layered composite plate 15 with large thickness ratio.
The above description is for the purpose of describing the invention in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments of the invention are limited to those described herein, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (9)
1. A rolling method of an aluminum/magnesium/aluminum laminated composite plate with a large thickness ratio is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing an upper aluminum strip, a lower aluminum strip and a magnesium alloy plate to be compounded;
s2, performing surface treatment on the magnesium alloy plate to be compounded;
s3, placing an upper aluminum strip to be compounded on an upper unreeling machine, placing a lower aluminum strip to be compounded on a lower unreeling machine, placing the initial positions of the heads of the upper aluminum strip and the lower aluminum strip to be compounded at the riveting position of an automatic riveting machine, placing a magnesium alloy plate subjected to surface treatment between the upper aluminum strip and the lower aluminum strip to be compounded, and riveting the upper aluminum strip to be compounded, the magnesium alloy plate subjected to surface treatment and the lower aluminum strip to be compounded through the automatic riveting machine to obtain an aluminum strip/magnesium alloy plate/aluminum strip;
s4, rolling the riveted aluminum strip/magnesium alloy plate/aluminum strip;
s5, heating an upper aluminum strip and a lower aluminum strip in the rolled aluminum strip/magnesium alloy plate/aluminum strip;
s6, rolling the heated aluminum strip/magnesium alloy plate/aluminum strip;
and S7, shearing the rolled aluminum strip/magnesium alloy plate/aluminum strip to obtain the qualified aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio.
2. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 1, wherein the rolling method comprises the following steps: in the step S1, the upper aluminum strip and the lower aluminum strip to be composited are any one of industrial pure aluminum, 3 series aluminum alloy, 5 series aluminum alloy and 6 series aluminum alloy, and the magnesium alloy plate to be composited is any one of Mg-Al series magnesium alloy.
3. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 1, wherein the rolling method comprises the following steps: in the step S1, the length, the width, and the thickness of the upper aluminum strip to be composited and the lower aluminum strip to be composited are the same, the thickness of the upper aluminum strip to be composited is 0.2mm to 1mm, the width of the magnesium alloy plate to be composited is the same as the width of the upper aluminum strip to be composited, the thickness of the magnesium alloy plate to be composited is 4mm to 20mm, and the thickness ratio of the upper aluminum strip to be composited, the magnesium alloy plate to be composited, and the lower aluminum strip to be composited is greater than or equal to 1:10: 1.
4. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 1, wherein the rolling method comprises the following steps: the step S2 is a specific operation of performing surface treatment on the magnesium alloy sheet: polishing the surface of the magnesium alloy plate until the roughness of the surface of the magnesium alloy plate is Ra 25-Ra 200, cleaning oil stains and an oxidation film on the surface of the magnesium alloy plate by using acetone and alcohol, standing and drying the magnesium alloy plate, and heating the magnesium alloy plate by using a vacuum heating furnace at the temperature of 300-450 ℃ for 10-60 min.
5. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 1, wherein the rolling method comprises the following steps: in the step S3, the magnesium alloy plate is pushed into the space between the upper aluminum strip to be combined and the lower aluminum strip to be combined by the boosting hydraulic cylinder and is sent into the automatic riveting machine for riveting, a positioning support roller is arranged between the boosting hydraulic cylinder and the automatic riveting machine and is used for stabilizing, supporting and positioning the upper aluminum strip and the lower aluminum strip to be combined, an upper roller of the positioning support roller is higher than the riveting position of the upper aluminum strip of the automatic riveting machine, and a lower roller of the positioning support roller is lower than the riveting position of the lower aluminum strip of the automatic riveting machine.
6. The rolling method of the aluminum/magnesium/aluminum laminated composite plate with the large thickness ratio as claimed in claim 5, wherein the rolling method comprises the following steps: the step S4 of rolling the riveted aluminum strip/magnesium alloy plate/aluminum strip specifically includes: and pushing the aluminum strip/magnesium alloy plate/aluminum strip obtained by riveting to an adjustable pressing roller by a boosting hydraulic cylinder for rolling, wherein the distance between the upper roller and the lower roller of the adjustable pressing roller is consistent with the total thickness of the aluminum strip/magnesium alloy plate/aluminum strip obtained by riveting, and the adjusting range of the adjustable pressing roller is 0-25 mm.
7. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 1, wherein the rolling method comprises the following steps: the step S5 of heating the upper aluminum strip and the lower aluminum strip of the rolled aluminum strip/magnesium alloy plate/aluminum strip includes the following specific steps: and (3) feeding the rolled aluminum strip/magnesium alloy plate/aluminum strip into a flat plate type induction heating device for heating, wherein the heating temperature of the flat plate type induction heating device is 300-450 ℃, and the heating time is 5-30 min.
8. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 7, wherein the rolling method comprises the following steps: the step S6 of rolling the heated aluminum strip/magnesium alloy plate/aluminum strip includes the following specific steps: feeding the heated aluminum strip/magnesium alloy plate/aluminum strip into a rolling mill for rolling, after the rolling is started, retracting a boosting hydraulic cylinder, and adjusting the unwinding speeds of an upper unwinding machine and a lower unwinding machine, so that the unwinding speeds of the upper unwinding machine and the lower unwinding machine are smaller than the rolling speed of the rolling mill, the amplitude of the unwinding speeds is 1% -5%, the rolling direction of the rolling mill is the same as the unwinding directions of the upper unwinding machine and the lower unwinding machine, and the rolling reduction of the aluminum strip/magnesium alloy plate/aluminum strip is 20% -65%.
9. The rolling method of the aluminum/magnesium/aluminum laminated composite board with the large thickness ratio as claimed in claim 9, wherein the rolling method comprises the following steps: the central lines of the aluminum strip/magnesium alloy plate/aluminum strip passing through the positioning support roller, the automatic riveting machine, the adjustable press roller and the rolling mill are strictly kept on the same straight line.
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