Stretching equipment and stretching method for heat-treated aluminum alloy plate

Abstract

The invention belongs to the technical field of plate machining, and particularly relates to heat treatment aluminum alloy plate stretching equipment and a stretching method.The heat treatment aluminum alloy plate stretching equipment comprises a workbench, supporting legs are arranged at the bottom of the workbench, an operation table is arranged on one side of the workbench, and a sliding groove and a clamping assembly are formed in the workbench; the clamping assembly comprises two mounting plates symmetrically arranged above the workbench, two symmetrically-arranged mounting rods are fixed to the mounting plates, clamps are fixed to the mounting rods, each clamp comprises a clamping jaw fixed to the corresponding mounting rod, a cavity is formed in each clamping jaw, a limiting plate is slidably connected into each cavity, and the limiting plates are fixed to the mounting rods. A movable rod is fixed to the limiting plate, an extrusion plate is fixed to the other end of the movable rod, and the movable rod is sleeved with a spring. The aluminum alloy plate is automatically clamped during stretching, when the two ends of the aluminum alloy plate deform due to thinning of the aluminum alloy plate, the extrusion blocks can rotate to clamp the aluminum alloy plate, and clamping looseness caused by deformation of the ends of the aluminum alloy plate is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet metal processing, and particularly relates to a stretching device and a stretching method for heat-treated aluminum alloy sheets. Background Art

[0002] An aluminum alloy plate is a sheet made of aluminum and other alloy elements, which has the advantages of light weight, high strength, corrosion resistance, good plasticity, and good environmental protection. It is widely used in many fields such as aerospace, architectural decoration, and electronic household appliances. With the progress of technology and the continuous improvement of processes, the application scope of aluminum alloy plates will continue to expand, bringing more convenience and benefits to people's production and life.

[0003] Existing technologies such as the stretching machine for heat-treated aluminum alloy sheets disclosed in the publication number CN116237413B include an equipment frame and an equipment table arranged inside the equipment frame; the equipment table is used to carry the sheet, and a pressing plate is arranged on the equipment frame, and the pressing plate is arranged above the equipment table and presses on the surface of the sheet; a clamping member is also arranged on the equipment frame, and the clamping member clamps both ends of the sheet. A driving member for moving the clamping member outward is arranged between the equipment table and the equipment frame; both ends of the pressing plate are externally connected with transmission connecting rods, and the transmission connecting rods are connected to the corresponding driving members. When the driving members drive the corresponding clamping members to move outward, the pressing plate is synchronously pushed downward. By the synchronous downward movement of the pressing plate as the sheet is stretched, the degree of fitting of the pressing plate to the sheet during the pressing process is ensured, and at the same time, excessive limiting is avoided, reducing the risk of indentation.

[0004] The existing device still has the following deficiencies:

[0005] 1. When the aluminum alloy sheet is stretched, as the aluminum alloy sheet is continuously elongated, its thickness will gradually decrease. Although the thickness change at both ends of the aluminum alloy clamped by the fixture is relatively small, there is still a morphological change. The change in the shape of the end of the aluminum alloy plate easily causes the clamping to loosen, resulting in the aluminum alloy plate being easily detached from the fixture, thus affecting the normal progress of the stretching work and further affecting the work efficiency. In addition, the detachment of the aluminum alloy plate from the fixture also poses a certain safety hazard.

[0006] 2. When the aluminum alloy sheet is stretched, dust, debris, etc. in the air are easily attached to the surface of the sheet. These attachments will affect the stretching effect and surface quality of the sheet. In addition, during stretching, the contact of the sheet with oxygen and water vapor in the air will cause the surface of the sheet to be oxidized and corroded to a certain extent.

[0007] 3. A large amount of heat is generated when the aluminum alloy plate is stretched. If these heats are not dissipated in time, the temperature of the aluminum alloy plate will rise, further affecting the stretching quality and performance of the aluminum alloy plate. Summary of the Invention

[0008] The object of the present invention is to provide a stretching device and a stretching method for heat-treated aluminum alloy plates in view of the problems raised in the above-mentioned background art.

[0009] To achieve the above object, the present invention adopts the following technical solutions: A stretching device for heat-treated aluminum alloy plates, comprising:

[0010] A workbench, legs are provided at the bottom of the workbench, an operating table is provided on one side of the workbench, and a chute is opened on the workbench;

[0011] A clamping assembly, the clamping assembly includes two mounting plates symmetrically arranged above the workbench, two symmetrically arranged mounting rods are fixed on the mounting plates, and clamps are fixed on the mounting rods.

[0012] Further, the clamp includes a jaw fixed on the mounting rod, a cavity is opened in the jaw, a limiting plate is slidably connected in the cavity, a movable rod is fixed on the limiting plate, an extrusion plate is fixed at the other end of the movable rod, and a spring is sleeved on the movable rod.

[0013] Further, the clamp further includes two symmetrically arranged triangular grooves opened on the jaw, the side wall of the triangular groove away from the cavity is vertically arranged, a central shaft is fixed in the triangular groove, and an extrusion block is rotatably connected to the central shaft through a torsion spring.

[0014] Further, a driving assembly for driving the clamp to move is provided on the workbench, the driving assembly includes two symmetrically arranged support columns slidably connected in the chute, a rotating shaft is rotatably connected to the top of the support column, the mounting plate is fixed on the rotating shaft, two symmetrically arranged rotating seats are fixed on the lower surface of the workbench, a bidirectional screw is rotatably connected on the two rotating seats, the bottom of the support column is threadedly connected to the bidirectional screw, and a motor is fixed on the lower surface of the workbench, and the output shaft of the motor is connected to the bidirectional screw through a coupling.

[0015] Further, a rotating assembly for driving the mounting plate to rotate is provided on the workbench, the rotating assembly includes a transmission shaft fixed on the two rotating seats, the transmission shaft penetrates through the two support columns, a chute is opened on the transmission shaft of the transmission shaft, a sleeve is rotatably connected on the support column, a first belt pulley is fixed on the sleeve, a flat key adapted to the chute is provided on the inner side wall of the sleeve, a second belt pulley is fixed on the rotating shaft, the second belt pulley is connected to the first belt pulley through a belt, a first column gear is fixed in the middle of the transmission shaft, and a second column gear meshing with the first column gear is fixed in the middle of the bidirectional screw.

[0016] Further, a blowing assembly is provided on the support column. The blowing assembly includes a piston chamber and a transmission chamber formed in the support column. The transmission chamber is located above the piston chamber. A piston plate is hermetically and slidably connected in the piston chamber. A piston rod is fixed on the piston plate. The piston rod extends into the transmission chamber. An air outlet hole is fixed on the side wall of the support column. The air outlet hole is communicated with the bottom of the piston chamber through an air duct.

[0017] Further, a driving disk is fixed at one end of the rotating shaft in the transmission chamber. A connecting rod is rotatably connected to the driving disk. The other end of the connecting rod is rotatably connected to the piston rod.

[0018] Further, when the extrusion blocks are in a vertical state, the vertical distance between the two extrusion blocks on the same jaw is greater than the thickness of the aluminum alloy plate.

[0019] The present invention also provides a method applied to the heat treatment aluminum alloy plate stretching equipment, including the following steps:

[0020] S1. Place the aluminum alloy plate in the jaws and turn on the motor;

[0021] S2. The motor drives the bidirectional screw to rotate, so that the two support columns move away from each other and drive the fixture to move synchronously, so that the extrusion blocks automatically clamp the aluminum alloy plate, and then the stretching work is carried out;

[0022] S3. When the bidirectional screw rotates, it drives the transmission shaft to rotate under the action of the first column gear and the second column gear, so that the rotating shaft is driven to rotate under the action of the first belt pulley, the second belt pulley and the belt, and further drives the aluminum alloy plate to rotate;

[0023] S4. When the rotating shaft rotates, it drives the driving disk to rotate, and further drives the piston rod and the piston plate to reciprocate up and down under the action of the connecting rod. The generated air flow blows from the air outlet hole to the aluminum alloy plate.

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] 1. By providing the extrusion blocks, when stretching the aluminum alloy plate, the fixture clamps the two ends of the aluminum alloy plate and moves to stretch the aluminum alloy plate. The extrusion blocks are always in a movement trend opposite to the movement direction of the fixture under the elastic force of the torsion springs to automatically clamp the aluminum alloy plate. And when the two ends of the aluminum alloy plate are deformed due to thinning, the extrusion blocks will rotate under the elastic force of the torsion springs to clamp the aluminum alloy plate, avoiding loosening of the clamping due to end deformation of the aluminum alloy plate, thus preventing the aluminum alloy plate from falling off the fixture, enabling the work to proceed stably and normally, and at the same time avoiding potential safety hazards caused by the aluminum alloy breaking away.

[0026] 2. The present invention is provided with a blowing component. When stretching work is carried out, the piston plate reciprocates in the piston cavity to generate air flow that blows from the air outlet holes towards the aluminum alloy plate, drying the surface of the aluminum alloy plate, reducing its contact with oxygen and moisture in the air, thereby slowing down the oxidation and corrosion rates of the aluminum alloy plate. In addition, blowing can also dissipate heat and cool down the aluminum alloy plate.

[0027] 3. The present invention is provided with a rotating component. When stretching work is carried out, the rotating shaft drives the aluminum alloy plate to rotate, which can make the heat dissipation of the aluminum alloy plate more uniform, thereby improving the stretching quality and performance of the aluminum alloy plate. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of a stretching device for heat-treated aluminum alloy plates provided by the present invention;

[0029] Figure 2 is the structural schematic diagram under the workbench in a stretching device for heat-treated aluminum alloy plates provided by the present invention;

[0030] Figure 3 is the front view cross-sectional view of a stretching device for heat-treated aluminum alloy plates provided by the present invention;

[0031] Figure 4 is Figure 3 the enlarged view at A in;

[0032] Figure 5 is the structural schematic diagram of the fixture in a stretching device for heat-treated aluminum alloy plates provided by the present invention;

[0033] Figure 6 is the structural schematic diagram of the sleeve in a stretching device for heat-treated aluminum alloy plates provided by the present invention;

[0034] Figure 7 is the flow chart of a stretching method for heat-treated aluminum alloy plates provided by the present invention.

[0035] In the figures, 1. Workbench; 11. Legs; 12. Operating table; 13. Slide groove;

[0036] 2. Mounting plate; 21. Mounting rod; 22. Fixture; 221. Claw; 222. Cavity; 223. Limiting plate; 224. Movable rod; 225. Extrusion plate; 226. Spring; 227. Triangular groove; 2271. Central axis; 2272. Extrusion block; 23. Support column; 24. Rotating shaft; 241. Second belt pulley; 25. Rotating seat; 26. Bidirectional screw; 27. Motor;

[0037] 31. Transmission shaft; 311. Slide groove; 32. Sleeve; 321. Feather key; 33. First belt pulley; 34. Belt; 35. First column gear; 36. Second column gear;

[0038] 41, piston chamber; 42, transmission chamber; 43, piston plate; 44, piston rod; 45, air outlet; 46, air passage; 47, drive disc; 471, connecting rod. Specific embodiments

[0039] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0040] As Figures 1-7 shown, a stretching device for heat-treated aluminum alloy sheets includes a workbench 1 and a clamping assembly. The bottom of the workbench 1 is provided with legs 11, and the legs 11 are telescopic, facilitating operation by the staff. An operating platform 12 is provided on one side of the workbench 1, and the operating platform 12 is used to control the operation of the device. A chute 13 is opened on the workbench 1. The clamping assembly includes two mounting plates 2 symmetrically arranged above the workbench 1. Two symmetrically arranged mounting rods 21 are fixed on the mounting plates 2, and clamps 22 are fixed on the mounting rods 21.

[0041] The clamp 22 includes a clamping jaw 221 fixed on the mounting rod 21. A cavity 222 is opened in the clamping jaw 221. A limiting plate 223 is slidably connected in the cavity 222. A movable rod 224 is fixed on the limiting plate 223. The other end of the movable rod 224 is fixed with a pressing plate 225. A spring 226 is sleeved on the movable rod 224. The clamp 22 further includes two symmetrically arranged triangular grooves 227 opened on the clamping jaw 221. The side wall of the triangular groove 227 away from the cavity 222 is vertically arranged. A central shaft 2271 is fixed in the triangular groove 227. A pressing block 2272 is rotatably connected to the central shaft 2271 through a torsion spring. When the side wall of the pressing block 2272 away from the pressing plate 225 rotates to the vertical direction, it will not rotate. At this time, the distance between the upper and lower pressing blocks 2272 is the closest. When the pressing block 2272 is in the vertical state, the vertical distance between the two pressing blocks 2272 on the same clamping jaw 221 is greater than the thickness of the aluminum alloy sheet. The aluminum alloy plate can be clamped before the pressing block 2272 rotates to the vertical direction;

[0042] The workbench 1 is provided with a driving assembly for driving the clamp 22 to move, and the driving assembly includes two symmetrically arranged support columns 23 slidably connected in the slide groove 13, and the top of the support column 23 is rotatably connected with a rotating shaft 24, and the mounting plate 2 is fixed on the rotating shaft 24. When the rotating shaft 24 rotates, it can drive the mounting plate 2 to rotate, thereby realizing the rotation of the aluminum alloy plate. Two symmetrically arranged rotating seats 25 are fixed on the lower surface of the workbench 1, and two bidirectional screws 26 are rotatably connected on the two rotating seats 25. The bottom of the support column 23 is threadedly connected with the bidirectional screw 26. When the bidirectional screw 26 rotates, it drives the two support columns 23 to move closer to or away from each other under the action of thread matching. A motor 27 is fixed on the lower surface of the workbench 1, and the output shaft of the motor 27 is connected to the bidirectional screw 26 through a coupling;

[0043] During operation, the aluminum alloy plate is placed in the clamp 221 and the motor 27 is turned on. The motor 27 drives the bidirectional screw 26 to rotate, and the two support columns 23 are driven away from each other under the action of thread cooperation and the clamp 22 is driven to move synchronously. When the clamp 22 moves, the extrusion block 2272 automatically clamps the aluminum alloy plate under the action of friction. After the extrusion block 2272 clamps the aluminum alloy plate, it moves synchronously with the clamp 22 to stretch the aluminum alloy plate.

[0044] The workbench 1 is provided with a rotating assembly for driving the mounting plate 2 to rotate. The rotating assembly includes a transmission shaft 31 fixed on two rotating seats 25. The transmission shaft 31 passes through two supporting columns 23. A sliding groove 311 is opened on the transmission shaft 31. A sleeve 32 is rotatably connected to the supporting column 23. A first pulley 33 is fixed on the sleeve 32. A flat key 321 adapted to the sliding groove 311 is provided on the inner side wall of the sleeve 32. When the transmission shaft 31 rotates, the sleeve 32 is driven to rotate under the action of the flat key 321, and the sleeve 32 can slide along the axial direction of the transmission shaft 31. A second pulley 241 is fixed on the rotating shaft 24. The second pulley 241 is connected to the first pulley 33 through a belt 34. A first column gear 35 is fixed to the middle of the transmission shaft 31, and a second column gear 36 meshing with the first column gear 35 is fixed to the middle of the bidirectional screw 26.

[0045] When the bidirectional screw 26 rotates, the transmission shaft 31 is driven to rotate under the action of the first column gear 35 and the second column gear 36, thereby driving the sleeve 32 and the first drive 33 to rotate under the action of the flat key 321 and the slide groove 311, and further driving the rotating shaft 24 to rotate under the action of the belt 34 and the second pulley 241, thereby driving the mounting plate 2 and the aluminum alloy plate to rotate.

[0046] The support column 23 is provided with a blowing assembly. The blowing assembly includes a piston chamber 41 and a transmission chamber 42 formed in the support column 23. The transmission chamber 42 is located above the piston chamber 41. A piston plate 43 is hermetically and slidably connected in the piston chamber 41. A piston rod 44 is fixed on the piston plate 43. The piston rod 44 extends into the transmission chamber 42. An air outlet hole 45 is fixed on the side wall of the support column 23. The air outlet hole 45 is communicated with the bottom of the piston chamber 41 through an air duct 46. When the piston plate 43 moves upward, external air is sucked into the piston chamber 41 through the air outlet 45. When the piston plate 43 moves downward, the air is discharged from the air outlet hole 45. One end of the rotating shaft 24 located in the transmission chamber 42 is fixed with a driving disc 47. A connecting rod 471 is rotatably connected to the driving disc 47. The other end of the connecting rod 471 is rotatably connected to the piston rod 44.

[0047] When the rotating shaft 24 rotates, it drives the driving disc 47 to rotate. Thus, under the action of the connecting rod 471, the piston rod 44 and the piston plate 43 move up and down reciprocally. When the piston plate 43 moves upward, external air is sucked into the piston chamber 41 through the air outlet 45. When the piston plate 43 moves downward, the air is discharged from the air outlet hole 45 and blown towards the aluminum alloy plate.

[0048] The present invention also provides a method applied to the heat treatment aluminum alloy sheet stretching equipment, including the following steps:

[0049] S1. Place the aluminum alloy plate in the clamping jaw 221 and turn on the motor 27;

[0050] S2. The motor 27 drives the bidirectional screw 26 to rotate, so that the two support columns 23 move away from each other and drive the fixture 22 to move synchronously, so that the extrusion block 2272 automatically clamps the aluminum alloy plate, and then the stretching work is carried out;

[0051] S3. When the bidirectional screw 26 rotates, it drives the transmission shaft 31 to rotate under the action of the first column gear 35 and the second column gear 36. Thus, under the action of the first belt pulley 33, the second belt pulley 241 and the belt 34, the rotating shaft 24 is driven to rotate, and further drives the aluminum alloy plate to rotate;

[0052] S4. When the rotating shaft 24 rotates, it drives the driving disc 47 to rotate. Further, under the action of the connecting rod 471, the piston rod 44 and the piston plate 43 move up and down reciprocally, and the generated air flow is blown from the air outlet hole 45 towards the aluminum alloy plate.

[0053] The working principle of the present invention is as follows:

[0054] During operation, place the aluminum alloy plate inside the jaw 221 and turn on the motor 27. The motor 27 drives the rotation of the bidirectional screw 26. Under the action of the thread fit, the two support columns 23 move away from each other and drive the fixture 22 to move synchronously. When the fixture 22 moves, the extrusion block 2272 automatically clamps the aluminum alloy plate under the action of friction, eliminating the need for manual clamping operation, improving work efficiency. And when the aluminum alloy plate deforms at both ends due to thinning, the extrusion block 2272 will rotate under the action of the torsion spring force to clamp the aluminum alloy plate, preventing the aluminum alloy plate from loosening due to end deformation, thus avoiding the aluminum alloy plate from falling off the fixture 22, enabling the work to proceed stably and normally, and at the same time avoiding the safety hazards caused by the falling of the aluminum alloy. After the extrusion block 2272 clamps the aluminum alloy plate, it moves synchronously with the fixture 22 to stretch the aluminum alloy plate;

[0055] When the bidirectional screw 26 rotates, it drives the transmission shaft 31 to rotate under the action of the first column gear 35 and the second column gear 36. Thus, under the action of the flat key 321 and the sliding groove 311, it drives the sleeve 32 and the first drive 33 to rotate. Further, under the action of the belt 34 and the second pulley 241, it drives the rotating shaft 24 to rotate, and then drives the mounting plate 2 and the aluminum alloy plate to rotate. When the rotating shaft 24 rotates, it drives the driving disk 47 to rotate. Thus, under the action of the connecting rod 471, it drives the piston rod 44 and the piston plate 43 to move up and down reciprocally. When the piston plate 43 moves upward, it sucks the external air into the piston chamber 41 through the air outlet 45. When the piston plate 43 moves downward, it discharges the air from the air hole 45 and blows it onto the aluminum alloy plate to dry the surface of the aluminum alloy plate, reducing its contact with oxygen and moisture in the air, thereby slowing down the oxidation and corrosion rate of the aluminum alloy plate. In addition, the blowing can also dissipate heat and cool down the aluminum alloy plate. The rotation of the aluminum alloy plate can make its heat dissipation more uniform, improving the stretching quality and performance of the aluminum alloy plate.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat-treated aluminum alloy sheet stretching device, characterized in that: include: A workbench (1), wherein a support leg (11) is provided at the bottom of the workbench (1), an operating table (12) is provided on one side of the workbench (1), and a slide groove (13) is provided on the workbench (1); A clamping assembly, the clamping assembly comprising two mounting plates (2) symmetrically arranged above a workbench (1), two symmetrically arranged mounting rods (21) being fixed on the mounting plates (2), and a clamp (22) being fixed on the mounting rods (21).

2. The heat-treated aluminum alloy sheet stretching equipment according to claim 1, characterized in that: The clamp (22) comprises a clamping claw (221) fixed on the mounting rod (21), a cavity (222) is provided in the clamping claw (221), a limiting plate (223) is slidably connected in the cavity (222), a movable rod (224) is fixed on the limiting plate (223), an extrusion plate (225) is fixed on the other end of the movable rod (224), and a spring (226) is sleeved on the movable rod (224).

3. The heat-treated aluminum alloy sheet stretching equipment according to claim 2, characterized in that: The clamp (22) further comprises two symmetrically arranged triangular grooves (227) opened on the clamping jaw (221), wherein the triangular grooves (227) are vertically arranged away from the side walls of the cavity (222), a central axis (2271) is fixed in the triangular groove (227), and an extrusion block (2272) is rotatably connected to the central axis (2271) via a torsion spring.

4. The heat-treated aluminum alloy sheet stretching equipment according to claim 2, characterized in that: The workbench (1) is provided with a driving assembly for driving the clamp (22) to move, and the driving assembly includes two symmetrically arranged support columns (23) slidably connected in the slide groove (13), the top of the support column (23) is rotatably connected to a rotating shaft (24), the mounting plate (2) is fixed on the rotating shaft (24), the lower surface of the workbench (1) is fixed with two symmetrically arranged rotating seats (25), the two rotating seats (25) are rotatably connected to a bidirectional screw (26), the bottom of the support column (23) is threadedly connected to the bidirectional screw (26), and the lower surface of the workbench (1) is fixed with a motor (27), and the output shaft of the motor (27) is connected to the bidirectional screw (26) through a coupling.

5. The heat-treated aluminum alloy sheet stretching equipment according to claim 4, characterized in that: The workbench (1) is provided with a rotating assembly for driving the mounting plate (2) to rotate, the rotating assembly comprising a transmission shaft (31) fixed on two rotating seats (25), the transmission shaft (31) passing through two supporting columns (23), a sliding groove (311) is provided on the transmission shaft (31), a sleeve (32) is rotatably connected to the supporting column (23), a first pulley (33) is fixed on the sleeve (32), a flat key (321) adapted to the sliding groove (311) is provided on the inner side wall of the sleeve (32), a second pulley (241) is fixed on the rotating shaft (24), the second pulley (241) is connected to the first pulley (33) through a belt (34), a first column gear (35) is fixed in the middle of the transmission shaft (31), and a second column gear (36) meshing with the first column gear (35) is fixed in the middle of the bidirectional screw (26).

6. The heat-treated aluminum alloy sheet stretching equipment according to claim 4, characterized in that: The support column (23) is provided with a blowing assembly, and the blowing assembly includes a piston chamber (41) and a transmission chamber (42) opened in the support column (23), the transmission chamber (42) is located above the piston chamber (41), a piston plate (43) is sealingly and slidably connected in the piston chamber (41), a piston rod (44) is fixed on the piston plate (43), and the piston rod (44) extends into the transmission chamber (42), and an air outlet (45) is fixed on the side wall of the support column (23), and the air outlet (45) is connected to the bottom of the piston chamber (41) through an air passage (46).

7. The heat-treated aluminum alloy sheet stretching equipment according to claim 6, characterized in that: One end of the rotating shaft (24) in the transmission chamber (42) is fixed with a driving disk (47), and a connecting rod (471) is rotatably connected to the driving disk (47), and the other end of the connecting rod (471) is rotatably connected to the piston rod (44).

8. The heat-treated aluminum alloy sheet stretching equipment according to claim 3, characterized in that: When the extrusion block (2272) is in a vertical state, the vertical distance between the two extrusion blocks (2272) on the same clamp (221) is greater than the thickness of the aluminum alloy plate.

9. A method for applying the heat-treated aluminum alloy sheet stretching equipment according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, placing the aluminum alloy plate in the clamp (221), and turning on the motor (27); S2, the motor (27) drives the bidirectional screw (26) to rotate so that the two support columns (23) move away from each other and drive the clamp (22) to move synchronously, so that the extrusion block (2272) automatically clamps the aluminum alloy plate, and then performs the stretching work; S3, when the bidirectional screw (26) rotates, the transmission shaft (31) is driven to rotate under the action of the first column gear (35) and the second column gear (36), thereby driving the rotating shaft (24) to rotate under the action of the first pulley (33), the second pulley (241) and the belt (34), and further driving the aluminum alloy plate to rotate; S4. When the rotating shaft (24) rotates, the driving plate (47) is driven to rotate, and further driven by the connecting rod (471) to reciprocate the piston rod (44) and the piston plate (43) up and down, and the generated air flow is blown toward the aluminum alloy plate from the air outlet (45).

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