An automatic stamping forming processing production line for aluminum cans

Abstract

The present application relates to the field of aluminum can stamping processing, and particularly relates to an automatic stamping forming processing production line for aluminum cans, which comprises a stamping table, the stamping table is internally provided with an upper die plate and a lower die plate which are stamping matched with each other, a stamping cylinder for driving the stamping processing of the upper die plate is fixedly arranged on the top of the stamping table, conveying tables passing through between the upper die plate and the lower die plate are arranged on both sides of the stamping table, an inlet conveying belt for conveying aluminum sheets to be stamped is arranged at one end of the conveying table, an outlet conveying belt for conveying can blanks after stamping is arranged at the other end of the conveying table, a pretreatment box is arranged between the inlet conveying belt and the lower die plate, and an oiling assembly and a cleaning assembly are respectively arranged in the pretreatment box. The present application can form an oil film with uniform thickness on the surface of the aluminum sheet by means of rotary spraying, and can fully cover the surface of the aluminum sheet, so that the oiling efficiency is high, the oiling effect is good, and the equipment cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of aluminum can stamping technology, and in particular to an automatic aluminum can stamping and forming production line. Background Technology

[0002] Aluminum can stamping is a high-speed, precision metal forming process. The process typically begins by cutting aluminum coils into round sheets, which are then stretched into shallow cup-shaped can blanks on a stamping press using a punch and die. These blanks undergo multiple subsequent stretching and thinning processes, gradually increasing in height and thickness, ultimately forming an aluminum can body with extremely thin sidewalls. The entire process places extremely high demands on material properties, lubrication, and die precision to achieve efficient, high-volume, and stable production.

[0003] On aluminum can stamping production lines, pre-treatment with oil is a necessary and indispensable step. Its core function is to provide lubrication during the intense metal stamping process, preventing the workpiece from wrinkling and cracking. Currently, the oiling methods used in aluminum can stamping production lines are usually roller coating or electrostatic spraying. Roller coating uses an oiling roller to apply stamping oil to the aluminum plate. The overall equipment is simple, but the oil coverage is uneven. Electrostatic spraying uses a high-voltage electrostatic field to evenly adsorb atomized oil droplets onto the metal surface, resulting in a better oil film uniformity, but the equipment cost is higher. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic stamping and forming production line for aluminum cans, which aims to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An automated aluminum can stamping and forming production line includes a stamping table with an upper and lower die plate that cooperate with each other for stamping. A stamping cylinder for driving the upper die plate for stamping is fixed on the top of the stamping table. Conveyor platforms passing between the upper and lower die plates are arranged on both sides of the stamping table. A feeding conveyor belt for conveying aluminum sheets to be stamped is provided at one end of the conveyor platform, and a discharging conveyor belt for conveying the stamped can blank is provided at the other end of the conveyor platform. A pretreatment box is arranged between the feeding conveyor belt and the lower die plate, and an oiling assembly and a cleaning assembly are respectively arranged inside the pretreatment box. The oiling assembly includes a negative pressure duct, with a ventilation chamber plate connected to its bottom. Negative pressure nozzles for adsorbing aluminum sheets are evenly arranged circumferentially at the bottom of the ventilation chamber plate. A rotating base is rotatably mounted on the bottom of the ventilation chamber plate. Extended cavity plates are evenly arranged circumferentially on the outer wall of the rotating base. The extended cavity plates have channels for the flow of stamping oil inside. Several atomizing nozzles are radially arranged at the bottom of the extended cavity plates. A drive rod for driving the extended cavity plates to rotate is fixed at the center of the upper end of the rotating base. When the extended cavity plates rotate, they drive the atomizing nozzles to rotate and spray stamping oil onto the surface of the aluminum sheets.

[0007] As a further embodiment of the present invention: a negative pressure fan and an oil pump are fixedly installed on the upper end of the pretreatment box, the top end of the negative pressure air duct is connected to the negative pressure fan, a rotating connecting sleeve is fixedly provided on the outer wall of the negative pressure air duct, the inner cavity of the rotating connecting sleeve is connected to the oil pump through an oil inlet pipe, and the oil pump is connected to an external oil source.

[0008] As a further embodiment of the present invention: an oil inlet ring is rotatably sleeved on the outer wall of the negative pressure air duct, the top end of the oil inlet ring and the bottom of the rotatable connecting sleeve form a rotatable sealing fit, the extension cavity plate is rotatably installed against the bottom of the ventilation cavity plate, the upper end of the extension cavity plate is fixedly connected to the oil inlet ring through a connecting sleeve plate, the connecting sleeve plate has a cavity structure inside, and the inner cavity of the extension cavity plate and the inner cavity of the oil inlet ring are connected through the connecting sleeve plate.

[0009] As a further embodiment of the present invention: a photoelectric sensor for sensing and detecting the passage of aluminum sheets is fixedly installed at the center of the bottom of the rotating chassis, and a ball bearing is uniformly mounted on the bottom of the rotating chassis in a circumferential direction, with the bottom end of the ball bearing being lower than the height of the atomizing nozzle.

[0010] As a further aspect of the present invention, the photoelectric sensor is communicatively connected to both the negative pressure fan and the oil pump.

[0011] As a further embodiment of the present invention: the top end of the drive rod passes through the ventilation chamber plate and extends into the negative pressure air duct, a drive fan blade is fixed on the outer wall of the top of the drive rod, and a sealing ring is provided at the connection between the drive rod and the ventilation chamber plate.

[0012] As a further aspect of the present invention: a pair of conveying wheels are rotatably installed at both ends inside the pretreatment box, and a set of positioning wheels is rotatably installed in the center inside the pretreatment box, with longitudinal space left inside the positioning wheels for the aluminum sheet to be adsorbed and lifted.

[0013] As a further aspect of the present invention: the cleaning assembly includes an intermittent gear and a synchronous gear. The intermittent gear is fixedly sleeved on the top of the axle of the conveyor wheel. The synchronous gear is rotatably installed in the pretreatment box and intermittently meshes with the intermittent gear. A fixing plate is fixedly provided on the top of the axle of the synchronous gear. A return tension spring is provided between the side wall of the fixing plate and the inner wall of the pretreatment box. The end of the fixing plate is fixedly connected to one end of a connecting rod. A cleaning roller is rotatably installed on the other end of the connecting rod. The cleaning roller rolls against the surface of the aluminum sheet.

[0014] The beneficial effects of this invention are:

[0015] (1) By setting up an oiling component, when the aluminum sheet passes the bottom of the ventilation chamber, the negative pressure nozzle will generate negative pressure suction to lift the aluminum sheet. At the same time, the drive rod will drive the rotating chassis and the extension chamber plate to rotate on the surface of the aluminum sheet. When the extension chamber plate rotates, it will spray stamping oil on the surface of the aluminum sheet through the atomizing nozzle. By rotating the spraying method, a uniform oil film can be formed on the surface of the aluminum sheet, which can fully cover the entire surface of the aluminum sheet. The oiling efficiency is high, the oiling effect is good, and the equipment cost is effectively reduced.

[0016] (2) During the oiling process, the adsorption and positioning process of the aluminum sheet and the rotary spraying process are carried out simultaneously. When the aluminum sheet is released and conveyed forward, the rotary spraying process will also stop at the same time. The spraying will continue until the next aluminum sheet is adsorbed and positioned, thus achieving "painting and stopping immediately". This can effectively control the amount of oil applied, avoid continuous spraying between aluminum sheet conveying gaps, and prevent the waste of oil resources. It also ensures that the amount of oil applied to each aluminum sheet is uniform and consistent, avoiding the problem of applying too much or too little oil.

[0017] (3) By setting up a cleaning component, when the two gears mesh, the synchronous gear will drive the cleaning roller to roll on the surface of the aluminum sheet through the fixed plate, and the reset spring will start to stretch and deform. When the two gears disengage, the fixed plate will swing in the opposite direction under the elastic force of the reset spring, thereby driving the cleaning roller to scrape back and forth on the surface of the aluminum sheet, thus effectively cleaning the dust particles on the surface of the aluminum sheet, avoiding the scratching and damage of the inner wall of the can by particulate impurities during the stamping process of the aluminum can, and effectively improving the forming quality of the aluminum can during stamping. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the pretreatment box in this invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the pretreatment box in this invention.

[0022] Figure 4 This is a schematic diagram of the oiling component in this invention.

[0023] Figure 5 This is a schematic diagram of the extended cavity plate in this invention.

[0024] Figure 6 This is a schematic diagram of the rotating chassis in this invention.

[0025] Figure 7 This is a schematic diagram of the cleaning component in this invention.

[0026] In the diagram: 1. Stamping table; 11. Stamping cylinder; 12. Upper template; 13. Lower template; 2. Conveying table; 21. Feeding conveyor belt; 22. Discharge conveyor belt; 3. Pre-treatment box; 31. Negative pressure fan; 32. Oil pump; 33. Conveying wheel; 34. Positioning wheel; 4. Oiling assembly; 41. Negative pressure duct; 411. Ventilation chamber plate; 412. Negative pressure nozzle; 413. Rotary connecting sleeve; 414. Oil inlet pipe; 42. Rotating chassis; 421. Photoelectric sensor; 422. Ball bearing; 43. Extension chamber plate; 431. Connecting sleeve plate; 432. Oil inlet ring; 433. Atomizing nozzle; 44. Drive rod; 441. Drive fan blade; 442. Sealing ring; 5. Cleaning assembly; 51. Intermittent gear; 52. Synchronous gear; 53. Fixing plate; 531. Reset spring; 54. Connecting rod; 55. Cleaning roller; 6. Aluminum sheet. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-5As shown, this invention is an automatic stamping and forming production line for aluminum cans, including a stamping table 1. The stamping table 1 has an upper template 12 and a lower template 13 that are mutually stamped and cooperate with each other. A stamping cylinder 11 for driving the upper template 12 to perform stamping is fixed on the top of the stamping table 1. Conveyor platforms 2 are arranged on both sides of the stamping table 1, passing between the upper template 12 and the lower template 13. One end of the conveyor platform 2 is equipped with a feeding conveyor belt 21 for conveying the aluminum sheet 6 to be stamped, and the other end of the conveyor platform 2 is equipped with a discharging conveyor belt 22 for conveying the stamped can blank. A pretreatment box 3 is arranged between the feeding conveyor belt 21 and the lower template 13. The pretreatment box 3 contains an oiling component 4 and a cleaning component. 5. The oiling assembly 4 includes a negative pressure duct 41. The bottom of the negative pressure duct 41 is connected to a ventilation chamber plate 411. The bottom end of the ventilation chamber plate 411 is uniformly provided with negative pressure nozzles 412 for adsorbing aluminum sheets 6. A rotating base plate 42 is rotatably mounted on the bottom of the ventilation chamber plate 411. The outer wall of the rotating base plate 42 is uniformly provided with an extension chamber plate 43. The extension chamber plate 43 has a cavity for the flow of stamping oil. Several atomizing nozzles 433 are arranged radially at the bottom end of the extension chamber plate 43. A drive rod 44 for driving the extension chamber plate 43 to rotate is fixed in the center of the upper end of the rotating base plate 42. When the extension chamber plate 43 rotates, it will drive the atomizing nozzles 433 to rotate and spray stamping oil on the surface of the aluminum sheet 6.

[0029] Specifically, by setting up the oiling component 4, the aluminum sheet 6 will pass through the pretreatment box 3 before being conveyed to the stamping table 1 for stamping. When the aluminum sheet 6 passes the bottom of the ventilation chamber plate 411, the negative pressure suction nozzle 412 will generate negative pressure suction to lift the aluminum sheet 6. At the same time, the drive rod 44 will drive the rotating base 42 and the extension chamber plate 43 to rotate on the surface of the aluminum sheet 6. When the extension chamber plate 43 rotates, it will spray stamping oil on the surface of the aluminum sheet 6 through the atomizing nozzle 433. By rotating the spraying method, a uniform oil film can be formed on the surface of the aluminum sheet 6, which can fully cover the entire surface of the aluminum sheet 6. The oiling efficiency is high and the oiling effect is good, which is beneficial to the stamping and stretching forming process of the aluminum can.

[0030] More specifically, during the oiling process, the adsorption and positioning process of the aluminum sheet 6 and the rotary spraying process are carried out simultaneously. When the aluminum sheet 6 is released and conveyed forward, the rotary spraying process will also stop at the same time. Spraying will only resume when the next aluminum sheet 6 is adsorbed and positioned, realizing "painting and stopping immediately". This can effectively control the amount of oil applied, avoid continuous spraying between the aluminum sheet 6 conveying gaps, which would cause waste of oil resources. At the same time, it also ensures that the amount of oil applied to each aluminum sheet 6 can be kept uniform and consistent, avoiding problems such as missed coating or over-coating.

[0031] like Figure 4 and Figure 5As shown, a negative pressure fan 31 and an oil pump 32 are fixedly installed on the upper end of the pretreatment box 3. The top end of the negative pressure air pipe 41 is connected to the negative pressure fan 31. A rotating connecting sleeve 413 is fixedly installed on the outer wall of the negative pressure air pipe 41. The inner cavity of the rotating connecting sleeve 413 is connected to the oil pump 32 through the oil inlet pipe 414. The oil pump 32 is connected to an external oil source.

[0032] Furthermore, an oil inlet ring 432 is rotatably sleeved on the outer wall of the negative pressure duct 41. The top of the oil inlet ring 432 forms a rotatable sealing fit with the bottom of the rotatable connecting sleeve 413. The extension cavity plate 43 is rotatably installed against the bottom of the ventilation cavity plate 411. The upper end of the extension cavity plate 43 is fixedly connected to the oil inlet ring 432 through the connecting sleeve plate 431. The connecting sleeve plate 431 has a cavity structure inside. The inner cavity of the extension cavity plate 43 and the inner cavity of the oil inlet ring 432 are connected through the connecting sleeve plate 431.

[0033] Specifically, during the oiling process, the drive rod 44 drives the extension chamber plate 43 to rotate on the surface of the aluminum sheet 6. In order to ensure that the atomizing nozzle 433 can supply oil smoothly during the rotation, an oil inlet ring 432 and a rotating connecting sleeve 413 are set. The oil pump 32 introduces the external oil source into the oil inlet ring 432 through the rotating connecting sleeve 413, and then from the oil inlet ring 432 through the connecting sleeve plate 431 into the inner cavity of the extension chamber plate 43. Finally, it is evenly sprayed out by the atomizing nozzle 433. During this process, the oil inlet ring 432 always maintains a rotational sealing fit with the rotating connecting sleeve 413, so as to ensure the sealing and avoid oil leakage without affecting the normal rotation process of the extension chamber plate 43.

[0034] like Figure 6 As shown, a photoelectric sensor 421 for sensing the passage of aluminum sheet 6 is fixedly installed at the center of the bottom of the rotating chassis 42. A ball bearing 422 is uniformly mounted on the bottom of the rotating chassis 42 in a circumferential direction. The bottom of the ball bearing 422 is lower than the height of the atomizing nozzle 433.

[0035] like Figure 4 and Figure 6 As shown, the photoelectric sensor 421 is communicatively connected to the negative pressure fan 31 and the oil pump 32.

[0036] Specifically, when the aluminum sheet 6 is conveyed past the rotating chassis 42, the photoelectric sensor 421 detects the passage of the aluminum sheet 6 and immediately feeds back the sensing signal to the negative pressure fan 31 and the oil pump 32. The negative pressure fan 31 starts and lifts the aluminum sheet 6 from the feed conveyor belt 21 through the negative pressure suction nozzle 412. At this time, the surface of the aluminum sheet 6 is in contact with the ball bearing 422, and the oil pump 32 also starts to supply oil to the atomizing nozzle 433. Since the bottom of the ball bearing 422 is lower than the height of the atomizing nozzle 433, a certain gap is left between the atomizing nozzle 433 and the surface of the aluminum sheet 6. This not only avoids the atomizing nozzle 433 from contacting the aluminum sheet 6 and causing scratches or damage, but also allows the sprayed oil mist to diffuse within this space, thereby effectively increasing the adhesion area of ​​the oil mist on the surface of the aluminum sheet 6 and ensuring that the entire aluminum sheet 6 is fully coated.

[0037] like Figure 4 and Figure 5 As shown, the top end of the drive rod 44 passes through the ventilation chamber plate 411 and extends into the negative pressure air duct 41. A drive fan blade 441 is fixed on the outer wall of the top of the drive rod 44, and a sealing ring 442 is provided at the connection between the drive rod 44 and the ventilation chamber plate 411.

[0038] Specifically, when negative pressure suction is generated in the negative pressure duct 41, the continuously flowing negative pressure air inside the duct will continuously blow towards the drive fan blade 441, causing the drive fan blade 441 to start driving the drive rod 44 to rotate. The drive rod 44 will drive the rotating chassis 42 and the extension cavity plate 43 to start rotating synchronously, so that the rotational spraying process can be realized simultaneously when the aluminum sheet 6 is adsorbed and positioned, so as to ensure full coverage and uniformity during oiling.

[0039] like Figure 1 and Figure 3 As shown, a pair of conveyor wheels 33 are rotatably installed at both ends inside the pretreatment box 3, and a set of positioning wheels 34 are rotatably installed in the center inside the pretreatment box 3. The positioning wheels 34 have a longitudinal space for the aluminum sheet 6 to be adsorbed and lifted.

[0040] Specifically, the function of the conveyor wheel 33 is to work with the feeding conveyor belt 21 to guide and convey the aluminum sheet 6 forward in an orderly manner. The function of the positioning wheel 34 is to work with the negative pressure suction nozzle 412 to adsorb and position the aluminum sheet 6: when the aluminum sheet 6 is conveyed between the positioning wheels 34, the positioning wheels 34 on both sides can limit the aluminum sheet 6 to prevent it from shifting. When the aluminum sheet 6 is adsorbed, the aluminum sheet 6 will be lifted longitudinally a short distance between the positioning wheels 34 to detach from the feeding conveyor belt 21. At this time, the aluminum sheet 6 is still stuck between the positioning wheels 34. When the aluminum sheet 6 is released, the aluminum sheet 6 will continue to be conveyed forward by the feeding conveyor belt 21. At this time, the aluminum sheet 6 will detach from between the positioning wheels 34.

[0041] like Figure 3 and Figure 7As shown, the cleaning component 5 includes an intermittent gear 51 and a synchronous gear 52. The intermittent gear 51 is fixedly sleeved on the top of the axle of the conveyor wheel 33. The synchronous gear 52 is rotatably installed in the pretreatment box 3 and intermittently meshes with the intermittent gear 51. A fixing plate 53 is fixedly provided on the top of the axle of the synchronous gear 52. A reset tension spring 531 is provided between the side wall of the fixing plate 53 and the inner wall of the pretreatment box 3. The end of the fixing plate 53 is fixedly connected to one end of the connecting rod 54. A cleaning roller 55 is rotatably installed on the other end of the connecting rod 54. The cleaning roller 55 rolls against the surface of the aluminum sheet 6.

[0042] Specifically, by setting up the cleaning component 5, when the aluminum sheet 6 is conveyed forward into the pretreatment box 3 by the conveyor wheel 33, the conveyor wheel 33 will simultaneously drive the intermittent gear 51 to rotate. When the intermittent gear 51 rotates, it will intermittently mesh with the synchronous gear 52. When the two gears mesh, the synchronous gear 52 will drive the cleaning roller 55 to roll on the surface of the aluminum sheet 6 through the fixed plate 53. The reset spring 531 will start to stretch and deform. When the two gears disengage, the fixed plate 53 will swing in the opposite direction under the elastic force of the reset spring 531, thereby driving the cleaning roller 55 to scrape back and forth on the surface of the aluminum sheet 6, thus effectively cleaning the dust particles on the surface of the aluminum sheet 6, avoiding the scratching and damage of the inner wall of the can by particulate impurities during the aluminum can stamping process, and effectively improving the forming quality of the aluminum can during stamping.

[0043] The working principle of this invention is as follows: Figures 1-7 As shown, during use, before the aluminum sheet 6 is conveyed to the stamping table 1 for stamping, it passes through the pre-treatment box 3. When the aluminum sheet 6 is conveyed through the rotating chassis 42, the photoelectric sensor 421 detects that the aluminum sheet 6 has passed by and immediately feeds back the sensing signal to the negative pressure fan 31 and the oil pump 32. The negative pressure fan 31 starts and lifts the aluminum sheet 6 from the feeding conveyor belt 21 through the negative pressure suction nozzle 412. At this time, the surface of the aluminum sheet 6 is in contact with the ball bearing 422, and the oil pump 32 will also start to supply oil to the atomizing nozzle 433. When negative pressure suction is generated inside the negative pressure duct 41, the continuously flowing negative pressure air inside the duct will continuously blow towards the drive fan blade 441, causing the drive fan blade 441 to start rotating the drive rod 44. The drive rod 44 will drive the rotating chassis 42 and the extension cavity plate 43 to start rotating synchronously. When the extension cavity plate 43 rotates, it will spray stamping oil onto the surface of the aluminum sheet 6 through the atomizing nozzle 433. Through the rotational spraying method, a uniform oil film can be formed on the surface of the aluminum sheet 6. After the oiling is completed, the aluminum sheet 6 continues to be conveyed forward and passes through the lower template 13. The aluminum sheet 6 is stamped into a can blank by the stamping cooperation of the upper template 12 and the lower template 13. The stamped can blank continues to be conveyed to the next process production line through the discharge conveyor belt 22.

[0044] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An automatic stamping and forming production line for aluminum cans, comprising a stamping table (1), wherein an upper template (12) and a lower template (13) are provided inside the stamping table (1) for mutual stamping cooperation, and a stamping cylinder (11) for driving the upper template (12) for stamping processing is fixedly provided on the top of the stamping table (1), characterized in that, The stamping table (1) is provided with conveyor platforms (2) on both sides, passing between the upper template (12) and the lower template (13). One end of the conveyor platform (2) is provided with a feeding conveyor belt (21) for conveying the aluminum sheet (6) to be stamped, and the other end of the conveyor platform (2) is provided with a discharging conveyor belt (22) for conveying the blank after stamping. A pretreatment box (3) is provided between the feeding conveyor belt (21) and the lower template (13). The pretreatment box (3) is provided with an oiling component (4) and a cleaning component (5) respectively. The oiling component (4) includes a negative pressure air duct (41). The bottom of the negative pressure air duct (41) is connected to a ventilation chamber plate (411). The bottom end of the cavity plate (411) is uniformly provided with negative pressure suction nozzles (412) for adsorbing aluminum sheets (6). The bottom of the ventilation cavity plate (411) is rotatably mounted with a rotating base plate (42). The outer wall of the rotating base plate (42) is uniformly provided with an extension cavity plate (43). The extension cavity plate (43) has a cavity for the flow of stamping oil. The bottom end of the extension cavity plate (43) is radially arranged with a number of atomizing nozzles (433). The center of the upper end of the rotating base plate (42) is fixed with a drive rod (44) for driving the extension cavity plate (43) to rotate. When the extension cavity plate (43) rotates, it will drive the atomizing nozzles (433) to rotate and spray stamping oil on the surface of the aluminum sheet (6).

2. The automatic stamping and forming production line for aluminum cans according to claim 1, characterized in that, The pretreatment box (3) is fixedly installed with a negative pressure fan (31) and an oil pump (32) at the upper end. The top end of the negative pressure air pipe (41) is connected to the negative pressure fan (31). A rotating connecting sleeve (413) is fixedly installed on the outer wall of the negative pressure air pipe (41). The inner cavity of the rotating connecting sleeve (413) is connected to the oil pump (32) through an oil inlet pipe (414). The oil pump (32) is connected to an external oil source.

3. The automatic stamping and forming production line for aluminum cans according to claim 2, characterized in that, An oil inlet ring (432) is rotatably sleeved on the outer wall of the negative pressure air duct (41). The top of the oil inlet ring (432) forms a rotational sealing fit with the bottom of the rotating connecting sleeve (413). The extension cavity plate (43) is rotatably installed against the bottom of the ventilation cavity plate (411). The upper end of the extension cavity plate (43) is fixedly connected to the oil inlet ring (432) through the connecting sleeve plate (431). The connecting sleeve plate (431) has a cavity structure inside. The inner cavity of the extension cavity plate (43) and the inner cavity of the oil inlet ring (432) are connected through the connecting sleeve plate (431).

4. The automatic stamping and forming production line for aluminum cans according to claim 1, characterized in that, A photoelectric sensor (421) for sensing the passage of aluminum sheet (6) is fixedly installed at the center of the bottom of the rotating chassis (42). A ball bearing (422) is installed at the bottom of the rotating chassis (42) in a uniform circumferential rotation. The bottom height of the ball bearing (422) is lower than the height of the atomizing nozzle (433).

5. The automatic stamping and forming production line for aluminum cans according to claim 4, characterized in that, The photoelectric sensor (421) is communicatively connected to the negative pressure fan (31) and the oil pump (32).

6. The automatic stamping and forming production line for aluminum cans according to claim 1, characterized in that, The top of the drive rod (44) passes through the ventilation chamber plate (411) and extends into the negative pressure air duct (41). A drive fan blade (441) is fixed on the outer wall of the top of the drive rod (44). A sealing ring (442) is provided at the connection between the drive rod (44) and the ventilation chamber plate (411).

7. The automatic stamping and forming production line for aluminum cans according to claim 1, characterized in that, The pretreatment box (3) has a pair of conveyor wheels (33) rotatably installed at both ends inside. The pretreatment box (3) has a set of positioning wheels (34) rotatably installed in the center inside. The positioning wheels (34) have a longitudinal space for the aluminum sheet (6) to be adsorbed and lifted.

8. The automatic stamping and forming production line for aluminum cans according to claim 7, characterized in that, The cleaning component (5) includes an intermittent gear (51) and a synchronous gear (52). The intermittent gear (51) is fixedly sleeved on the top of the axle of the conveyor wheel (33). The synchronous gear (52) is rotatably installed in the pretreatment box (3) and intermittently meshes with the intermittent gear (51). A fixing plate (53) is fixedly provided on the top of the axle of the synchronous gear (52). A reset tension spring (531) is provided between the side wall of the fixing plate (53) and the inner wall of the pretreatment box (3). The end of the fixing plate (53) is fixedly connected to one end of the connecting rod (54). A cleaning roller (55) is rotatably installed on the other end of the connecting rod (54). The cleaning roller (55) rolls against the surface of the aluminum sheet (6).

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