CN114226513A - Aluminum alloy wallboard preforming device and mechanical-vacuum creep aging forming method - Google Patents
Aluminum alloy wallboard preforming device and mechanical-vacuum creep aging forming method Download PDFInfo
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- CN114226513A CN114226513A CN202210079559.2A CN202210079559A CN114226513A CN 114226513 A CN114226513 A CN 114226513A CN 202210079559 A CN202210079559 A CN 202210079559A CN 114226513 A CN114226513 A CN 114226513A
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- aluminum alloy
- slide rail
- portal frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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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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Abstract
The invention discloses an aluminum alloy wallboard preforming device and an aluminum alloy wallboard mechanical-vacuum creep age forming method, wherein the aluminum alloy wallboard preforming device comprises a mold, a tail frame, a sliding rail and a loading mechanism; the tail frame is arranged at one end of the mold; the slide rail is including the slide rail one and the slide rail two that link to each other, and loading mechanism includes portal frame, shaping clamp plate and drive arrangement, and the bottom and two slide rail cooperations of portal frame, the cooperation structure between portal frame and the slide rail adopt the cooperation structure of ball slide rail formula, and drive arrangement sets up on the portal frame, drive arrangement is used for the shaping clamp plate makes the shaping clamp plate can reciprocate. The aluminum alloy wallboard preforming device is simple in structure and low in manufacturing cost, can be used for preforming/cold forming of any material plate part with low requirements, and has the characteristics of large forming force, variable forming curvature and reliable forming; the forming method saves a large amount of manpower, is convenient and quick and has high production efficiency.
Description
Technical Field
The invention relates to the technical field of aluminum alloy wallboard forming, in particular to aluminum alloy wallboard preforming equipment and a mechanical-vacuum creep aging forming method.
Background
In the process of preparing the multi-curvature aluminum alloy wallboard by using the autoclave molding process, the overhigh height between the wallboard and the mold is caused by the matching relation between the structural size of the wallboard and the curvature of the mold, and in the vacuum pumping process, the vacuum bag is easily sucked into the middle of the wallboard and the mold to break, so that the wallboard molding fails.
At present, artificially control the whole vacuumizing process in the creep age forming process of the aluminum alloy wallboard, namely, control the slow loading of vacuum pressure in the vacuumizing process, stop pressurizing and manually pull out the vacuum bag suction part when the vacuum bag suction is too much between the mold and the wallboard, so repeatedly make the wallboard slowly fit the mold and reduce the overhigh, and finally make the wallboard fit the mold and then send into the autoclave for creep age.
In view of the above problems, many people in the art have begun to research preloading devices and creep age forming methods, for example, chinese patent application with application publication No. CN110052520A discloses that parts are deformed by bolt loading, but because the mold surface is formed by hinge-type connection, deformation of each point is not easy to control when bolt loading occurs, the accuracy of the curved surface is not high, and meanwhile, the automation degree is low due to the bolt force application mode. The chinese patent application publication No. CN106978578A discloses a creep age forming method, but the specific structural form of mechanical loading is not given. In patent CN104561848A, in order to reduce the overhang between the mold and the wallboard, a method of roll bending first and then creep age forming is proposed, which easily causes cracks and even breaks in the wallboard ribs during the roll bending process of the wallboard, and has a great influence on the performance of the wallboard after creep age forming.
Disclosure of Invention
The invention aims to provide an aluminum alloy wallboard preforming device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides an aluminum alloy wallboard preforming device which comprises a die, a tailstock, two sliding rails and a plurality of loading mechanisms, wherein the die comprises a die body and a plurality of loading mechanisms; the top of the die is provided with a die profile correspondingly matched with the curvature of the formed aluminum alloy wall plate, and the tail frame is detachably connected to one end of the die; the two slide rails are arranged in parallel at intervals, each slide rail comprises a first slide rail arranged on the mold and a second slide rail arranged on the tail frame, and the first slide rail is connected with the second slide rail; every loading mechanism all includes portal frame, shaping clamp plate and drive arrangement, the portal frame strides and establishes the tailstock or mould top, the both sides column bottom of portal frame is fixed a position respectively on two the slide rail, just the portal frame can follow the slide rail slides, the shaping clamp plate sets up the crossbeam below of portal frame, drive arrangement sets up on the portal frame, drive arrangement is used for the shaping clamp plate makes the shaping clamp plate can reciprocate, the shaping clamp plate can be in under drive arrangement's the effect the aluminium alloy wallboard that places on the mould carries out preforming.
Furthermore, the forming press plate comprises an arc-shaped part with the bottom surface consistent with the curvature of the formed aluminum alloy wall plate and connecting parts respectively positioned at two ends of the arc-shaped part, and the top surface of each connecting part is provided with at least one vertically arranged guide slide block; the gantry crane is characterized in that a cross beam of the gantry frame is provided with a guide groove corresponding to the guide sliding block, a guide rail is arranged in the guide groove, and the guide sliding block vertically penetrates through the guide groove and can slide relative to the guide rail.
Furthermore, the driving device comprises a servo motor, a speed reducer, a ball screw and a screw nut which are arranged on the portal frame, the output end of the servo motor is connected with the input end of the speed reducer through a coupler, the output end of the speed reducer is connected with one end of the ball screw which is vertically arranged, the screw nut is installed on the ball screw, and when the ball screw rotates, the screw nut can follow the axial direction of the ball screw to perform linear reciprocating motion.
Furthermore, a lower flange is arranged on the forming pressing plate, and the forming pressing plate is fixedly connected with the lead screw nut through the lower flange.
Furthermore, the bottoms of the upright columns on two sides of the portal frame are provided with a sliding groove matched with the sliding rail, two rows of balls are arranged in the sliding groove, and the two rows of balls are arranged in the ball sliding grooves on two side surfaces of the sliding groove.
Furthermore, the bottoms of the upright columns on two sides of the portal frame are respectively in threaded connection with a locking screw, and the locking screws can be pushed against the sliding rail after rotating and moving downwards, so that the portal frame cannot move.
Furthermore, a barb for preventing the gantry frame from separating from the slide rail in the vertical direction is arranged on the outer side surface of the slide rail, and a barb groove matched with the barb is arranged at the bottom of an upright post of the gantry frame; the two first sliding rails are symmetrically arranged on two opposite sides of the top of the mold, the two second sliding rails are symmetrically arranged on two opposite sides of the top of the tailstock, and the cross section of the second sliding rails is the same as that of the first sliding rails.
Furthermore, one end, far away from the first sliding rail, of the second sliding rail is provided with a limiting head for preventing the portal frame from being separated from the second sliding rail.
The invention also provides a mechanical-vacuum creep aging forming method for the aluminum alloy wall plate, which performs the aluminum alloy wall plate by using the multi-curvature aluminum alloy wall plate performing equipment, and the forming method comprises the following steps:
s1, placing the aluminum alloy wall plate to be formed on a mold and positioning, laying a layer of breathable felt on the upper surface of the aluminum alloy wall plate after positioning is finished, arranging sealant on the two edges of the slide rail and the periphery of the mold, laying a vacuum bag and a vacuum nozzle, and then covering silica gel with a certain thickness on the upper surface of the vacuum bag;
s2, pushing the two portal frames into proper positions of the mold from the tail frame respectively, and fixing the portal frames; then, a driving device of the loading mechanism is started, the driving device drives the forming pressing plate to move downwards so as to perform pre-forming loading on the aluminum alloy wall plate, and when the periphery of the aluminum alloy wall plate is tightly attached to the mold, the driving device is closed, and the vacuum bag is sealed; then opening a vacuum system and setting the vacuum pressure to be 0.7-1MPa, so that the lower surface of the aluminum alloy wallboard is attached to the mold; and finally, controlling the driving device to work reversely, gradually lifting the forming pressing plate, and pushing the two portal frames back to the tail frame.
S3, the die and the preformed aluminum alloy wall plate are sent into an autoclave, the heating speed is 1.2-1.8 ℃/min, the heating speed is 150-200 ℃, the pressure of 0.8-1.2 MPa is applied in the autoclave, the heat preservation is carried out for 5-10 h, then the vacuum and the pressure of the autoclave are unloaded, the aluminum alloy wall plate is cooled along with the autoclave, and finally the formed aluminum alloy wall plate with a certain curvature is formed.
Further, step S1 is preceded by the step of pretreating the aluminum alloy wall panel:
s01, milling a plurality of grooves on one side face of the aluminum alloy wall plate to enable the aluminum alloy wall plate to become a ribbed wall plate, wherein the milling depth is 2-4 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the pre-forming equipment for the aluminum alloy wall plate comprises a die, a tailstock, two sliding rails and a plurality of loading mechanisms, wherein each loading mechanism can independently control a forming pressing plate of the loading mechanism to load the aluminum alloy wall plate, and the bottom surface of the forming pressing plate in each loading mechanism can be provided with different curvatures so as to form the multi-curvature aluminum alloy wall plate; the preforming device has the advantages of simple structure and low manufacturing cost, can be used for preforming any material plate part and cold forming with low precision requirement, and has the characteristics of large forming force, variable forming curvature and reliable forming.
(2) The invention provides a novel creep age forming method, namely a mechanical-vacuum creep age forming method, wherein an aluminum alloy wallboard is preformed through preforming equipment, then the vacuum pressure is used for keeping the aluminum alloy wallboard in a film pasting state, a mold and the wallboard are integrally placed in an autoclave for creep age forming, the vacuumizing process does not need to be manually controlled in the forming process, and the mechanical-vacuum creep age forming method has the characteristics of high forming precision and high automation degree. The forming method saves a large amount of manpower, is convenient and quick and has high production efficiency.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic perspective view of a preferred embodiment of an aluminum alloy panel preforming apparatus according to the invention;
FIG. 2 is a schematic side view of the aluminum alloy panel preforming apparatus of FIG. 1;
FIG. 3 is a schematic view of the construction of the forming platen of the present invention;
FIG. 4 is a schematic view of a gantry slide rail ball structure of the present invention;
FIG. 5 is a schematic structural view of a ribbed wallboard in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural view of another ribbed wallboard in accordance with embodiments of the present invention;
FIG. 7 is a schematic view of the position of a gantry (in cooperation with a tailstock) when a molding apparatus is in an inoperative state according to an embodiment of the present invention;
FIG. 8 is a schematic view of the gantry position (in cooperation with the mold) with the molding apparatus in the pre-molded state according to an embodiment of the present invention;
the device comprises a die 1, a die 1.1, a die profile 2, a tailstock 3, two sliding rails 3.1, a sliding rail I3.2, a sliding rail II 3a barb 3b, a limiting head 4, a portal frame 5, a forming press plate 5.1, an arc part 5.2, a connecting part 6, a guide slider 7, a guide rail 8, a servo motor 9, a coupler 10, a speed reducer 10, a ball screw 11, a screw nut 12, a lower flange 13, an A-aluminum alloy wallboard and an A.1-groove.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 to 4, the embodiment provides an aluminum alloy wall plate preforming apparatus, including a mold 1, a tail frame 2, two slide rails 3, and a plurality of loading mechanisms; the concrete structure is as follows:
the top of mould 1 is equipped with mould profile 1.1, and the mould profile can set up to single curvature profile according to the demand (the camber of shaping aluminum alloy wallboard), also can set up to the multiple curvature profile. The tailstock 2 is detachably attached to one end of the mold. Two slide rails are arranged in parallel at intervals, each slide rail 3 comprises a first slide rail 3.1 arranged on the die and a second slide rail 3.2 arranged on the tailstock, and the first slide rail is connected with the second slide rail to form a linear slide rail. Specifically, the two first sliding rails are symmetrically arranged on two opposite sides of the top of the mold, the two second sliding rails are symmetrically arranged on two opposite sides of the top of the tailstock, and the cross section of the second sliding rails is the same as that of the first sliding rails. The first sliding rail 3.1 and the second sliding rail 3.2 can be integrally formed with the mold 1 and the tail frame 2 respectively or arranged in a split mode.
Each loading mechanism comprises a portal frame 4, a forming pressing plate 5 and a driving device, the portal frame is arranged above the tail frame or the die in a spanning mode, stand columns on two sides of the portal frame are matched with the two slide rails, and a matching structure between the portal frame and the slide rails is a ball slide rail type matching structure. Specifically, the bottoms of the upright columns on two sides of the portal frame are provided with a sliding groove matched with the sliding rail, two rows of balls are arranged in the sliding groove, and the two rows of balls are arranged in the ball sliding grooves on two side surfaces of the sliding groove. The forming pressing plate is arranged below a cross beam of the portal frame and comprises an arc-shaped part 5.1 with the bottom surface consistent with the curvature of the formed aluminum alloy wall plate and connecting parts 5.2 respectively positioned at two ends of the arc-shaped part; the arc portion is provided with a lower flange 13, and the top surface of each connecting portion is provided with two vertically-arranged guide sliding blocks 6. The driving device is arranged on the portal frame and used for forming the pressing plate so that the forming pressing plate can move up and down. A guide groove corresponding to the guide sliding block is formed in the cross beam of the portal frame, a guide rail 7 is arranged in the guide groove, and the guide sliding block penetrates through the guide groove from top to bottom and can slide relative to the guide rail. The slider cooperates with the guide rail, plays the guide effect, also prevents simultaneously that the shaping clamp plate from producing the shrinkage deformation at the pushing down in-process.
In a preferred embodiment of the invention, the driving device comprises a servo motor 8, a speed reducer 10, a ball screw 11 and a screw nut 12 which are arranged on the portal frame, wherein the output end of the servo motor is connected with the input end of the speed reducer through a coupler 9, the output end of the speed reducer is connected with one end of the vertically arranged ball screw, the screw nut is arranged on the ball screw, and the lower end of the screw nut is fixedly connected with the lower flange; when the ball screw rotates, the screw nut can do linear reciprocating motion along the axial direction of the ball screw, namely, the up-and-down motion of the forming pressing plate can be realized when the ball screw rotates. In the structural arrangement, a speed reducer transmission gear is installed on an output shaft of the speed reducer, a screw rod transmission gear is installed at the connecting end of the ball screw and the speed reducer, and the speed reducer transmission gear is meshed with the screw rod transmission gear.
In a preferred embodiment of the invention, the bottoms of the upright posts on two sides of the portal frame are respectively in threaded connection with a locking screw, and the locking screws can be pressed against the sliding rail after rotating and moving downwards, so that the portal frame cannot move; namely, after each portal frame is pushed to the respective proper position, the portal frames are positioned through the locking screws.
In a preferred embodiment of the invention, the outer side surface of the slide rail is provided with a barb 3a for preventing the gantry frame from separating from the slide rail in the vertical direction, and the bottom of the upright post of the gantry frame is provided with a barb groove matched with the barb; and one end of the second sliding rail, which is far away from the first sliding rail, is provided with a limiting head 3b for preventing the portal frame from being separated from the second sliding rail.
The embodiment of the invention also provides a mechanical-vacuum creep aging forming method for the aluminum alloy wall plate, the aluminum alloy wall plate is preformed and loaded by the aluminum alloy wall plate preforming equipment, and the forming method comprises the following steps:
s1, placing the aluminum alloy wall plate to be molded on the mold 1 and positioning, laying a layer of breathable felt on the upper surface of the aluminum alloy wall plate after positioning is finished, arranging sealant on the edge of the second sliding rail 3.2 and the periphery of the mold, laying a vacuum bag and a vacuum nozzle, and then covering a layer of silica gel on the upper surface of the vacuum bag;
s2, pushing the two portal frames 4 into proper positions of the mold from the tail frame 2 respectively, and fixing the portal frames; then, a driving device of the loading mechanism A is started, the driving device drives the forming pressing plate 5 to move downwards so as to perform preforming on the aluminum alloy wall plate, and when the periphery of the aluminum alloy wall plate is tightly attached to the mold, the driving device is closed, and the vacuum bag is sealed; then opening a vacuum system and setting the vacuum pressure to be 0.7-1MPa, so that the lower surface of the aluminum alloy wallboard is attached to the mold 1; and finally, controlling the driving device to work reversely to gradually lift the forming pressing plate, and pushing the two portal frames back to the tail frame.
S3, the die 1 and the preformed aluminum alloy wall plate are sent into an autoclave, the heating speed is 1.2-1.8 ℃/min, the heating speed is 150-200 ℃, the autoclave applies 0.8-1.2 MPa pressure, the heat preservation is carried out for 5-10 hours, then the vacuum and the autoclave pressure are unloaded, the aluminum alloy wall plate is cooled along with the autoclave, and finally the formed aluminum alloy wall plate with a certain curvature is formed.
In a preferred embodiment of the present invention, step S1 is preceded by the step of pretreating the aluminum alloy panel:
s0, milling a plurality of grooves on one side face of the aluminum alloy wallboard, enabling the aluminum alloy wallboard to become a ribbed wallboard, and milling depth of 2-4 mm.
The embodiment also provides a mechanical-vacuum creep aging forming method for the aluminum alloy wall plate, the aluminum alloy wall plate is preformed by the aluminum alloy wall plate preforming equipment, and the forming method comprises the following steps:
1. firstly, milling an aluminum alloy wall plate A to be formed with the size of 1000 multiplied by 7mm into a ribbed wall plate with grooves A.1 in various shapes, wherein the milling depth is 3mm, and the ribbed wall plate is shown in figures 5 and 6;
2. then placing the milled ribbed wallboard into a lower die for positioning, laying a layer of breathable felt on the upper surface of the ribbed wallboard after positioning, arranging at least two sealing glue on the edge of the guide rail and the periphery of the die, laying a vacuum bag and a vacuum nozzle, and then covering a layer of silica gel on the upper surface of the vacuum bag; at this time, the gantry is located above the tailstock, as shown in fig. 7;
3. manually pushing the two portal frames into a proper position of a lower die from a tail frame (as shown in fig. 8), fixing the portal frames, starting a servo motor, adjusting a driver of the servo motor so as to adjust the falling speed of the intermediate transition plate, stopping the motor when the periphery of the aluminum alloy wall plate is tightly attached to the die, sealing a vacuum bag, opening a vacuum system, setting the vacuum pressure to be 0.7-1MPa, attaching the lower surface of the aluminum alloy wall plate to the die, finally controlling the motor to rotate reversely, gradually lifting the intermediate transition plate, and pushing the two portal frames into the tail frame; wherein, the fixing mode of the portal frame can select a jackscrew or a guide rail with a locking device;
4. and (3) feeding the lower die and the wallboard into an autoclave, heating to 150-200 ℃ at a heating rate of 1.2-1.8 ℃/min, applying a pressure of 0.8-1.2 MPa in the autoclave, preserving heat for 5-10 h, then unloading the vacuum and the pressure of the autoclave, cooling the aluminum alloy wallboard along with the autoclave, and finally forming the ribbed wallboard with a certain curvature.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The pre-forming equipment for the aluminum alloy wall plate is characterized by comprising a die (1), a tail frame (2), two sliding rails (3) and a plurality of loading mechanisms; the top of the die is provided with a die profile (1.1) correspondingly matched with the curvature of the formed aluminum alloy wall plate, and the tail frame is detachably connected to one end of the die; the two slide rails are arranged in parallel at intervals, each slide rail comprises a first slide rail (3.1) arranged on the mold and a second slide rail (3.2) arranged on the tail frame, and the first slide rail is connected with the second slide rail; every loading mechanism all includes portal frame (4), shaping clamp plate (5) and drive arrangement, the portal frame strides and establishes the tailstock or mould top, the both sides column bottom of portal frame is fixed a position two respectively on the slide rail, just the portal frame can be followed the slide rail slides, the shaping clamp plate sets up the crossbeam below of portal frame, drive arrangement sets up on the portal frame, drive arrangement is used for the shaping clamp plate makes the shaping clamp plate can reciprocate, the shaping clamp plate can drive arrangement's effect down the opposite place in aluminium alloy wallboard on the mould carries out the preforming.
2. The aluminum alloy wallboard preforming device according to claim 1, wherein the forming press plate comprises an arc-shaped portion (5.1) having a bottom surface conforming to the curvature of the formed aluminum alloy wallboard and connecting portions (5.2) respectively located at both ends of the arc-shaped portion, and at least one vertically arranged guide slider (6) is arranged on the top surface of each connecting portion; a guide groove corresponding to the guide sliding block is formed in the cross beam of the portal frame, a guide rail (7) is arranged in the guide groove, and the guide sliding block penetrates through the guide groove from top to bottom and can slide relative to the guide rail.
3. The aluminum alloy wallboard preforming device according to claim 1, wherein the driving device comprises a servo motor (8), a speed reducer (10), a ball screw (11) and a screw nut (12) which are arranged on the portal frame, an output end of the servo motor is connected with an input end of the speed reducer through a coupling (9), an output end of the speed reducer is connected with one end of the vertically arranged ball screw, the screw nut is installed on the ball screw, and the screw nut can do linear reciprocating motion along the axial direction of the ball screw when the ball screw rotates.
4. The aluminum alloy wallboard preforming device according to claim 3, wherein the forming press plate is provided with a lower flange (13) through which the forming press plate is fixedly connected with the lead screw nut.
5. The aluminum alloy wallboard preforming device of claim 1, wherein the bottom of the upright posts on both sides of the portal frame is provided with a sliding groove matched with the sliding rail, two rows of balls are arranged in the sliding groove, and the two rows of balls are arranged in the ball sliding grooves on both sides of the sliding groove.
6. The aluminum alloy wallboard preforming device of claim 1, wherein the locking screws are in threaded connection with the bottoms of the two side columns of the portal frame, and the locking screws can be pressed against the sliding rails after rotating and moving downwards, so that the portal frame cannot move.
7. The aluminum alloy wallboard preforming device according to claim 1, wherein a barb (3a) for preventing the gantry frame from separating from the slide rail in the vertical direction is arranged on the outer side surface of the slide rail, and a barb groove matched with the barb is arranged at the bottom of the upright column of the gantry frame; the two first sliding rails are symmetrically arranged on two opposite sides of the top of the mold, the two second sliding rails are symmetrically arranged on two opposite sides of the top of the tailstock, and the cross section of the second sliding rails is the same as that of the first sliding rails.
8. The aluminum alloy wallboard preforming device according to claim 1, wherein an end of the second slide rail remote from the first slide rail is provided with a stopper (3b) for preventing the gantry from separating from the second slide rail.
9. A mechanical-vacuum creep age forming method of an aluminum alloy panel, characterized in that the aluminum alloy panel (a) is preformed using the preforming apparatus as set forth in any one of claims 1 to 8, the forming method comprising the steps of:
s1, placing the aluminum alloy wall plate to be formed on a mold (1) and positioning, laying a layer of breathable felt on the upper surface of the aluminum alloy wall plate after positioning is finished, arranging sealant on the edge of the second sliding rail (3.2) and the periphery of the mold, laying a vacuum bag and a vacuum nozzle, and then covering silica gel with a certain thickness on the upper surface of the vacuum bag;
s2, pushing the two portal frames (4) into proper positions of the die from the tail frame (2) respectively, and fixing the portal frames; then, a driving device of the loading mechanism (A) is started, the driving device drives the forming pressing plate (5) to move downwards so as to perform pre-forming loading on the aluminum alloy wall plate, and when the periphery of the aluminum alloy wall plate is tightly attached to the mold (1), the driving device is closed, and a vacuum bag is sealed; then opening a vacuum system and setting the vacuum pressure to be 0.7-1MPa, so that the lower surface of the aluminum alloy wallboard is attached to the die (1); and finally, controlling the driving device to work reversely, gradually lifting the forming pressing plate, and pushing the two portal frames back to the tail frame.
S3, the die (1) and the preformed aluminum alloy wall plate are conveyed into an autoclave, the heating speed is 1.2-1.8 ℃/min, the heating speed is 150-200 ℃, the pressure of 0.8-1.2 MPa is applied in the autoclave, the heat preservation is carried out for 5-10 h, then the vacuum and the pressure of the autoclave are unloaded, the aluminum alloy wall plate is cooled along with the autoclave, and finally the formed aluminum alloy wall plate with a certain curvature is formed.
10. The forming method according to claim 9, characterized in that the step S1 is preceded by a step of pretreating the aluminum alloy wall panel (a):
s01, milling a plurality of grooves (A.1) on one side face of the aluminum alloy wall plate (A), so that the aluminum alloy wall plate (A) becomes a ribbed wall plate, and the milling depth is 2-4 mm.
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| CN202210079559.2A CN114226513B (en) | 2022-01-24 | 2022-01-24 | Aluminum alloy wallboard preforming device and mechanical-vacuum creep aging forming method |
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| CN103191987A (en) * | 2013-03-28 | 2013-07-10 | 西北工业大学 | Incubator integral wallboard age forming die |
| CN106978578A (en) * | 2017-05-18 | 2017-07-25 | 中南大学 | A kind of aluminium alloy plate creep age forming method |
| CN207667609U (en) * | 2017-11-15 | 2018-07-31 | 常山兴佳液压设备有限公司 | A kind of press with powder screening function |
| US20210170472A1 (en) * | 2019-12-05 | 2021-06-10 | Lapmaster Wollers GmbH | Press ram for a fine blanking press |
| CN214556759U (en) * | 2021-03-26 | 2021-11-02 | 长沙航空职业技术学院 | Creep aging forming device for metal plate |
| CN214814211U (en) * | 2021-06-02 | 2021-11-23 | 东莞市图盛金属制品有限公司 | Stamping die convenient to change mould benevolence |
| CN113579013A (en) * | 2021-07-07 | 2021-11-02 | 安徽省伊锡尔重工科技有限公司 | Continuous bending machine for right-angle bending of metal plate |
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| CN114226513B (en) | 2023-03-24 |
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