A production line for stretching, trimming and punching fire extinguisher bottles

Abstract

This invention provides a production line for stretching, trimming, and punching fire extinguisher bottles, relating to the field of fire extinguisher manufacturing technology. This segmented stamping production line for fire extinguisher bottles includes a feeding rack and a disc loading platform. A magnetic feeding mechanism is installed above the feeding rack and the disc loading platform. A first stamping machine is installed at the end of the disc loading platform away from the feeding rack. A disc loading mechanism is installed at the end of the disc loading platform above the first stamping machine. Material stacking mechanisms are fixedly connected to both sides of the end of the disc loading platform above the first stamping machine. The three stamping machines in this invention, in conjunction with corresponding stretching dies, can stamp and stretch workpieces in segments, processing disc blanks into bottle body workpieces. A feeding conveyor belt installed between the three stamping machines, in conjunction with corresponding bottle unloading and loading mechanisms, can sequentially and synchronously perform unloading and loading operations after the stamping process is completed, eliminating the need for manual loading and unloading.

Description

Technical Field

[0001] This invention relates to the field of fire extinguisher manufacturing technology, specifically to a production line for stretching, trimming, and punching fire extinguisher bottles. Background Technology

[0002] Fire extinguishers are common fire-fighting equipment, stored in public places or areas where fires may occur. They typically consist of a cylinder, head, nozzle, and other components. Driven by pressure, they spray out the extinguishing agent they contain. These portable fire-fighting tools are used to extinguish fires. A fire extinguisher cylinder segmented stamping production line is an automated production line that processes round iron plates into seamless cylinders through multiple stamping processes. This process uses deep drawing technology to transform flat materials into cylindrical shells, featuring high production efficiency, stable product quality, and high material utilization. It is widely used in the manufacture of cylinders for various types of fire extinguishers (dry powder, water-based, clean gas, etc.).

[0003] The existing production line requires workpieces to be stamped and stretched in sections during production, and only one stretching can be performed at a time. If a workpiece needs to be stretched multiple times, it must be manually removed and placed in another set of molds for a second stretching, and then manually removed and sent for a third stretching. The drawback is that the repeated manual removal and feeding of materials is not only inefficient but may also damage the workpieces. It also easily leads to safety risks such as workers being crushed or scratched. In addition, since the fire extinguisher cylinder is a metal product, long-term manual handling will result in excessive workload for workers and a significant decline in production efficiency, indicating room for further improvement. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a production line for stretching, trimming, and punching fire extinguisher bottles, which solves the problems described in the background section.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a stretching, trimming, and punching production line for fire extinguisher bottles, comprising a feeding rack and a disc loading platform. A magnetic feeding mechanism is provided above the feeding rack and the disc loading platform. A first stamping machine is provided at the end of the disc loading platform away from the feeding rack. A disc loading mechanism is provided at the end of the disc loading platform above the first stamping machine. Material stacking mechanisms are fixedly connected to both sides of the end of the disc loading platform above the first stamping machine away from the first stamping machine. A first feeding conveyor belt is provided at the end of the first feeding conveyor belt away from the first stamping machine. A second stamping machine is provided at the end of the first feeding conveyor belt away from the first stamping machine. A second feeding conveyor belt is provided at the end of the second stamping machine away from the first feeding conveyor belt. The system includes a feeding conveyor belt, a third stamping machine located at the end of the second feeding conveyor belt away from the second stamping machine, and a discharge conveyor belt located at the end of the third stamping machine away from the second feeding conveyor belt. Bottle unloading mechanisms are fixedly connected above the ends of the first feeding conveyor belt, the second feeding conveyor belt, and the discharge conveyor belt near the first stamping machine. Bottle loading mechanisms are fixedly connected above the ends of the first feeding conveyor belt and the second feeding conveyor belt near the third stamping machine. A punching machine is located at the end of the discharge conveyor belt away from the third stamping machine. An edge trimming machine is located on the side of the punching machine away from the discharge conveyor belt. A bottle transfer mechanism is located between the discharge conveyor belt and the punching machine. A bottle positioning cylinder is obliquely fixedly connected at an angle above the end of the discharge conveyor belt near the punching machine.

[0006] Preferably, the first, second, and third stamping presses are all existing 800-ton four-column hydraulic presses, and each of the first, second, and third stamping presses is equipped with stamping and drawing dies of corresponding specifications from coarse to fine at its stamping station. Each of the first, second, and third stamping presses can be equipped with a ring-shaped hydraulic ejector platform that can be raised and lowered on the outside of the bottom die of the stamping and drawing die.

[0007] Preferably, the bottle unloading mechanism includes two side slide rails, an electric toothed belt, a liftable gantry frame, an electric push rod, and a magnetic arm. The lower parts of the two side slide rails are fixedly connected to the frame of the corresponding conveyor belt, and the electric toothed belt is installed through the upper parts of the two side slide rails. The lower ends of the liftable gantry frame are slidably connected to the side slide rails. The upper part of the electric toothed belt is fixedly connected to the bottom of the liftable gantry frame. A lifting frame is slidably installed on the inner side of the liftable gantry frame. An electric push rod is fixedly connected to the upper middle part of the liftable gantry frame. The output end of the electric push rod is fixedly connected to the lifting frame. A horizontally placed magnetic arm is fixedly connected to the bottom of the lifting frame.

[0008] Preferably, the bottle feeding mechanism and the bottle unloading mechanism have the same structure but are installed in opposite directions, which increases the complexity of the equipment, improves its versatility, and reduces the difficulty of maintenance.

[0009] Preferably, both the punching machine and the trimming machine are existing mature equipment on the market. An existing magnetic bottle transfer rack is provided above the punching machine and the trimming machine, and an unloading platform is provided on the side of the trimming machine away from the punching machine.

[0010] Preferably, the magnetic feeding mechanism includes an electric cantilever frame, a cantilever beam, an electric slide block, a pneumatic telescopic cantilever, an elastic connecting frame, and an electromagnetic feeding head. The lower ends of the electric cantilever frame are fixedly connected to the upper part of the feeding frame and the disc loading platform, respectively. A movable cantilever beam is provided in the upper middle part of the cantilever frame, and an electric slide block is movably provided below the cantilever beam. A pneumatic telescopic cantilever is fixedly connected below the electric slide block. An elastic connecting frame is fixedly connected to the lower output end of the pneumatic telescopic cantilever. An electromagnetic feeding head is fixedly connected to the end of the elastic connecting frame away from the pneumatic telescopic cantilever.

[0011] Preferably, the stacking mechanism includes two symmetrically arranged cylinders, the output ends of the two cylinders are fixedly connected to a stacking frame, and the two stacking frames are symmetrically fixedly connected to stacking vertical rods on both sides.

[0012] Preferably, the bottle transfer mechanism includes a fixed slide, a transverse slide, a pneumatic lifting frame, an L-shaped lifting arm, and an arc-shaped electromagnet. The transverse slide is longitudinally slidably connected above the fixed slide, and the pneumatic lifting frame is transversely slidably connected above the transverse slide. The L-shaped lifting arm is slidably connected to the side of the pneumatic lifting frame near the discharge conveyor belt, and the arc-shaped electromagnet is rotatably connected to the end of the L-shaped lifting arm near the discharge conveyor belt. A drive cylinder is provided at the end of the fixed slide, the transverse slide, and the pneumatic lifting frame, and a drive motor is provided at the connection between the L-shaped lifting arm and the arc-shaped electromagnet.

[0013] Preferably, the disc loading platform includes an electric roller frame, a lifting grid frame, alloy air pipes, and a hydraulic lifting seat. Multiple electrically driven rollers are arranged above the electric roller frame. A hydraulic lifting seat is fixedly connected to the lower end of the electric roller frame near the first press. A lifting grid frame is fixedly connected above the hydraulic lifting seat. A grid plate is arranged above the lifting grid frame at a position corresponding to the gap between the multiple electrically driven rollers. Alloy air pipes are arranged above both sides of the electric roller frame, and air jet holes are arranged above both alloy air pipes.

[0014] Preferably, the disc feeding mechanism includes a fixed slide, a pneumatic pusher, a lifting cylinder, a pneumatic suction cup, and a pusher cylinder. The bottom of the fixed slide is fixedly connected to the top of the electric roller frame. A pneumatic pusher is slidably connected to the inner side of the top of the fixed slide. A pusher cylinder is fixedly connected to the top end of the fixed slide away from the first press. The output end of the pusher cylinder is fixedly connected to the pneumatic pusher. A lifting cylinder is fixedly connected to the middle of the pneumatic pusher. A pneumatic suction cup is fixedly connected to the lower output end of the lifting cylinder through the pneumatic pusher.

[0015] Preferably, a feeding hopper is fixedly connected above the end of the first stamping press near the first feeding conveyor belt, and an arc-shaped push rod is fixedly connected to the end of the pneumatic pusher near the first stamping press.

[0016] Preferably, bottle-body constraint railings are fixedly connected to both sides above the first feeding conveyor belt, the second feeding conveyor belt, and the narrowest spacing of the corresponding railings corresponds to the diameter of the workpiece in that section.

[0017] Preferably, the bottle positioning cylinder is laid at a 45-degree angle, and the output end of the bottle positioning cylinder is fixedly connected to a positioning fork with a right-angle bend, and the axis of the output rod of the bottle positioning cylinder coincides with the center line of the positioning fork. An optical sensor is provided above the positioning fork.

[0018] (III) Beneficial Effects This invention provides a production line for stretching, trimming, and punching fire extinguisher bottles. It has the following advantages: 1. This invention is equipped with three stamping presses, which, together with corresponding stretching dies, can stamp and stretch workpieces in sections to process disc blanks into bottle workpieces. The feeding conveyor belt set between the three stamping presses, together with the corresponding bottle unloading mechanism and bottle loading mechanism, can move sequentially and synchronously to perform unloading and loading work after the stamping process is completed, eliminating the need for manual loading and unloading work, improving operating efficiency and reducing safety risks.

[0019] 2. Based on the actual production situation, this invention utilizes the characteristics of the first stamped workpiece having a large diameter and low center of gravity. It is equipped with a feeding hopper and a pneumatic pusher for the disc feeding mechanism. During feeding, the pneumatic pusher can push the workpiece that has been pushed out of the bottom mold by the annular hydraulic pusher onto the feeding hopper before the disc feeding. At the same time, the disc held by the pneumatic suction cup is moved to the top of the mold for unloading. While ensuring safety and efficiency, this invention optimizes the equipment for the first unloading process and reduces production line costs.

[0020] 2. This invention is equipped with a bottle transfer mechanism, which works in conjunction with a bottle positioning cylinder. After the bottle is discharged from the conveyor belt, the positioning fork of the bottle positioning cylinder limits the bottle to a stable position while the conveyor belt is running. At the same time, the production line control cabinet can start the bottle transfer mechanism through the signal received by the sensor. The curved electromagnet attracts the bottle. After the positioning fork retracts, the bottle is raised and the curved electromagnet is rotated by the drive motor to place the bottle horizontally, which makes it easier to move the bottle directly onto the punching machine and improves the handling efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the left-side three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the right side of the present invention; Figure 3 This is a front view of the present invention. Figure 4 This is a three-dimensional structural diagram of the magnetic feeding mechanism and the disc loading platform of the present invention; Figure 5 This is a three-dimensional structural diagram of the discharge conveyor belt of the present invention; Figure 6 This is a three-dimensional schematic diagram of the bottle transfer mechanism of the present invention.

[0022] Among them, 1. Feeding rack; 2. Magnetic feeding mechanism; 21. Cantilever frame; 22. Cantilever beam; 23. Electric slide block; 24. Pneumatic telescopic cantilever; 25. Elastic connecting frame; 26. Electromagnetic suction head; 3. Disc loading platform; 31. Electric roller frame; 32. Lifting grid frame; 33. Alloy air pipe; 35. Hydraulic lifting seat; 4. First stamping press; 5. First feeding conveyor belt; 6. Second stamping press; 7. Second feeding conveyor belt; 8. Third stamping press; 9. Bottle unloading mechanism; 91. Side slide rail frame; 92. Electric toothed belt; 93. Liftable gantry frame; 94. 10. Electric push rod; 11. Magnetic suction arm; 12. Edge trimming machine; 13. Material stacking mechanism; 14. Bottle feeding mechanism; 15. Discharge conveyor belt; 16. Feeding hopper; 17. Punching machine; 18. Bottle transferring mechanism; 19. Fixed slide table; 10. Horizontal slide block; 11. Pneumatic lifting frame; 12. L-shaped lifting arm; 13. Arc electromagnet; 14. Unloading table; 15. Bottle positioning cylinder; 16. Disc feeding mechanism; 19. Fixed slide frame; 19. Pneumatic push frame; 19. Lifting cylinder; 19. Pneumatic suction cup; 19. Push frame cylinder. Detailed Implementation

[0023] 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.

[0024] Example 1: like Figure 1-6 As shown, this embodiment of the invention provides a stretching, trimming, and punching production line for fire extinguisher bottles, including a feeding rack 1 and a disc loading platform 3. A magnetic feeding mechanism 2 is arranged above the feeding rack 1 and the disc loading platform 3. A first stamping machine 4 is arranged at the end of the disc loading platform 3 away from the feeding rack 1. The magnetic feeding mechanism 2 includes an electric cantilever frame 21, a cantilever beam 22, an electric slide 23, a pneumatic telescopic cantilever 24, an elastic connecting frame 25, and an electromagnetic suction head 26. The lower two ends of the electric cantilever frame 21 are respectively fixedly connected to the upper parts of the feeding rack 1 and the disc loading platform 3. A movable cantilever beam 22 is arranged in the middle of the upper part of the cantilever frame 21, and the cantilever... An electric slide 23 is movably installed below the beam 22. A pneumatic telescopic arm 24 is fixedly connected below the electric slide 23. An elastic connecting frame 25 is fixedly connected to the lower output end of the pneumatic telescopic arm 24. An electromagnetic suction head 26 is fixedly connected to the end of the elastic connecting frame 25 away from the pneumatic telescopic arm 24. A counter is installed below the electromagnetic suction head 26. Multiple discs can be attracted at one time for feeding by the magnetic force of the electromagnetic suction head 26. The discs can be placed directly on the feeding rack 1. At the same time, the counter counts the number of feedings. Since the number of discs attracted each time is approximately the same, the remaining amount can be directly counted, which is convenient for subsequent feeding work. A disc feeding mechanism 19 is provided above the disc feeding platform 3, near the end of the first stamping machine 4. A feeding hopper 14 is fixedly connected above the end of the first stamping machine 4 near the first feeding conveyor belt 5. An arc-shaped push rod is fixedly connected to the end of the pneumatic pusher 192 near the end of the first stamping machine 4. The disc feeding mechanism 19 includes a fixed slide 191, a pneumatic pusher 192, a lifting cylinder 193, a pneumatic suction cup 194, and a pusher cylinder 195. The bottom of the fixed slide 191 is fixedly connected to the top of the electric roller frame 31. The pneumatic pusher 192 is slidably connected to the inner side of the top of the fixed slide 191. The pusher cylinder 195 is fixedly connected to the top of the fixed slide 191 away from the first stamping machine 4. The output end of the pusher cylinder 195 is fixedly connected to the pneumatic pusher 192. The middle part of the pneumatic pusher 192 is fixed. A lifting cylinder 193 is connected, and a pneumatic suction cup 194 is fixedly connected to the lower output end of the lifting cylinder 193 through the pneumatic pusher 192. A tension sensor is also set between the pneumatic suction cup 194 and the cylinder output end. When the disc quality is detected to be incorrect, an alarm can be triggered. Based on the actual production situation, the feeding hopper 14 is set up to take advantage of the characteristics of the first stamping workpiece having a large diameter and low center of gravity. In conjunction with the pneumatic pusher 192 of the disc feeding mechanism 19, the front arc-shaped push rod can push the workpiece that has been pushed out of the bottom mold by the annular hydraulic pusher to the feeding hopper 14 before the disc is fed. At the same time, the disc held by the pneumatic suction cup 194 is moved to the top of the mold for unloading. While ensuring safety and efficiency, the equipment of the first unloading process is optimized and the production line cost is reduced. The material stacking mechanism 11 is fixedly connected to both sides of the upper end of the disc feeding platform 3 away from the first stamping machine 4. The material stacking mechanism 11 includes two symmetrically arranged cylinders. The output ends of the two cylinders are fixedly connected to the alignment frame. The two sides of the two alignment frames are symmetrically fixedly connected to the alignment vertical rods. After the magnetic feeding mechanism 2 feeds the material, the stacked discs can be aligned to improve the subsequent feeding accuracy. The disc loading platform 3 includes an electric roller frame 31, a lifting grid frame 32, an alloy air pipe 33, and a hydraulic lifting seat 35. Multiple electrically driven rollers are arranged above the electric roller frame 31. The hydraulic lifting seat 35 is fixedly connected to the lower end of the electric roller frame 31 near the first press 4. The lifting grid frame 32 is fixedly connected above the hydraulic lifting seat 35. A grid plate is arranged above the lifting grid frame 32 at a position corresponding to the gap between the multiple electrically driven rollers. Alloy air pipes 33 are arranged on both sides above the electric roller frame 31. Air jet holes are arranged above the two alloy air pipes 33. After the material stack is lifted, air can be blown into the gap below the top disc through the air jet holes to prevent the discs from adsorbing each other due to vacuum negative pressure. The first stamping press 4 is equipped with a first feeding conveyor belt 5 at the end away from the disc loading platform 3. The second stamping press 6 is equipped with the end of the first feeding conveyor belt 5 away from the first stamping press 4. The second feeding conveyor belt 7 is equipped with the end of the second stamping press 6 away from the first feeding conveyor belt 5. The third stamping press 8 is equipped with the end of the second feeding conveyor belt 7 away from the second stamping press 6. The discharge conveyor belt 13 is equipped with the end of the third stamping press 8 away from the second feeding conveyor belt 7. The first stamping press 4, the second stamping press 6 and the third stamping press 8 are all existing 800-ton four-column hydraulic presses. The stamping stations of the first stamping press 4, the second stamping press 6 and the third stamping press 8 are respectively equipped with stamping and drawing dies of corresponding specifications from coarse to fine. The first stamping press 4, the second stamping press 6 and the third stamping press 8 can all be equipped with a ring hydraulic ejector platform that can be lifted and lowered on the outside of the bottom die of the stamping and drawing die for demolding after stamping. The first feeding conveyor belt 5, the second feeding conveyor belt 7, and the discharge conveyor belt 13 are all fixedly connected to the upper part of their ends near the first stamping machine 4 with a bottle unloading mechanism 9. The bottle unloading mechanism 9 includes two side slide rails 91, an electric toothed belt 92, a liftable gantry frame 93, an electric push rod 94, and a magnetic suction arm 95. The lower parts of the two side slide rails 91 are fixedly connected to the frame of the corresponding conveyor belt. An electric toothed belt 92 is installed through the upper part of each side slide rail 91. The lower ends of the liftable gantry frame 93 are slidably connected to the side slide rails 91. The upper part of the belt 92 is fixedly connected to the bottom of the liftable gantry frame 93. A lifting frame is slidably provided on the inner side of the liftable gantry frame 93. An electric push rod 94 is fixedly connected to the upper middle part of the liftable gantry frame 93. The output end of the electric push rod 94 is fixedly connected to the lifting frame. A horizontally placed magnetic suction arm 95 is fixedly connected to the bottom of the lifting frame. A bottle feeding mechanism 12 is fixedly connected to the upper part of the first feeding conveyor belt 5 and the second feeding conveyor belt 7 near the end of the third stamping machine 8. The bottle feeding mechanism 12 has the same structure as the bottle unloading mechanism 9, but the installation direction is opposite. A punching machine 15 is installed at the end of the discharge conveyor belt 13 away from the third punching machine 8. A trimming machine 10 is installed on the side of the punching machine 15 away from the discharge conveyor belt 13. Both the punching machine 15 and the trimming machine 10 are existing mature equipment on the market. An existing magnetic bottle transfer rack is installed above the punching machine 15 and the trimming machine 10. There is an electric slide and a pneumatic telescopic arm magnetic bottle transfer rack, which is used to move the punched bottles to the trimming machine 10. A discharge table 17 is installed on the side of the trimming machine 10 away from the punching machine 15. A hydraulic lifting ramp is installed below the workstation of the trimming machine 10. After the trimming is completed, the hydraulic lifting ramp is raised, and the bottles can roll down onto the discharge table 17 by gravity. A bottle transfer mechanism 16 is provided between the discharge conveyor belt 13 and the punching machine 15. The bottle transfer mechanism 16 includes a fixed slide table 161, a transverse slide block 162, a pneumatic lifting frame 163, an L-shaped lifting arm 164, and an arc-shaped electromagnet 165. The transverse slide block 162 is longitudinally slidably connected above the fixed slide table 161. The pneumatic lifting frame 163 is transversely slidably connected above the transverse slide block 162. The L-shaped lifting arm 164 is slidably connected to the side of the pneumatic lifting frame 163 near the discharge conveyor belt 13. The arc-shaped electromagnet 165 is rotatably connected to the end of the L-shaped lifting arm 164 near the discharge conveyor belt 13. A drive cylinder is provided at the end of the fixed slide table 161, the transverse slide block 162, and the pneumatic lifting frame 163. The L-shaped lifting arm 164 and the arc-shaped electromagnet 165 are connected to the drive cylinder. A drive motor is installed at the connection of the iron 165. A bottle positioning cylinder 18 is obliquely fixed at the upper angle of the end of the discharge conveyor belt 13 near the punching machine 15. When punching and trimming are required, the bottle transfer mechanism 16, in conjunction with the bottle positioning cylinder 18, can limit the bottle to a stable position by the positioning fork of the bottle positioning cylinder 18 after the discharge of the material from the discharge conveyor belt 13. At the same time, the control cabinet of the production line can start the bottle transfer mechanism 16 through the signal received by the sensor. The curved electromagnet 165 is used to attract the bottle. After the positioning fork retracts, the bottle is raised and the curved electromagnet 165 is rotated by the drive motor to place the bottle horizontally, which makes it easier to move the bottle directly onto the punching machine 15 and improves the handling efficiency.

[0025] Working Principle: During operation, this invention utilizes three stamping presses in conjunction with corresponding stretching dies to stamp and stretch workpieces in segments, processing the disc blank into bottle-shaped workpieces. A feeding conveyor belt positioned between the three stamping presses, along with corresponding bottle unloading mechanisms 9 and bottle loading mechanisms 12, allows for synchronized unloading and loading after the stamping process, minimizing transfer time. This eliminates the need for manual loading and unloading, improving operational efficiency and reducing safety risks. Furthermore, when punching and trimming are required after the stamping process,… The bottle transfer mechanism 16, in conjunction with the bottle positioning cylinder 18, can limit the bottle to a stable position when the conveyor belt is running after the bottle is discharged from the discharge conveyor belt 13. At the same time, the control cabinet of the production line can start the bottle transfer mechanism 16 through the signal received by the sensor. The curved electromagnet 165 is used to attract the bottle. After the positioning fork retracts, the bottle is raised and the curved electromagnet 165 is rotated by the drive motor to place the bottle horizontally, which makes it easier to move the bottle directly onto the punching machine 15, thus improving the handling efficiency.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production line for stretching, trimming, and punching fire extinguisher bottles, comprising a feeding rack (1) and a disc loading platform (3), characterized in that: A magnetic feeding mechanism (2) is provided above the feeding rack (1) and the disc loading platform (3). A first stamping machine (4) is provided at the end of the disc loading platform (3) away from the feeding rack (1). A disc loading mechanism (19) is provided at the end of the disc loading platform (3) above the first stamping machine (4). Material stacking mechanisms (11) are fixedly connected to both sides of the end of the disc loading platform (3) above the first stamping machine (4). A first feeding conveyor belt (5) is provided at the end of the first feeding conveyor belt (5) away from the disc loading platform (3). A second stamping machine (6) is provided at the end of the first feeding conveyor belt (5) away from the first stamping machine (4). A second feeding conveyor belt (7) is provided at the end of the second feeding conveyor belt (6) away from the first feeding conveyor belt (5). A third stamping machine (8) is provided at the end of the second feeding conveyor belt (7) away from the second stamping machine (6). The third stamping machine (8) is provided with a discharge conveyor belt (13) at the end away from the second feeding conveyor belt (7). Bottle feeding mechanism (9) is fixedly connected above the end of the first feeding conveyor belt (5), the second feeding conveyor belt (7) and the discharge conveyor belt (13) near the first stamping machine (4). Bottle feeding mechanism (12) is fixedly connected above the end of the first feeding conveyor belt (5) and the second feeding conveyor belt (7) near the third stamping machine (8). A punching machine (15) is provided at the end of the discharge conveyor belt (13) away from the third stamping machine (8). An edge trimming machine (10) is provided on the side of the punching machine (15) away from the discharge conveyor belt (13). A bottle transfer mechanism (16) is provided between the discharge conveyor belt (13) and the punching machine (15). A bottle positioning cylinder (18) is fixedly connected at an angle above the end of the discharge conveyor belt (13) near the punching machine (15).

2. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The first stamping press (4), the second stamping press (6) and the third stamping press (8) are all existing 800-ton four-column hydraulic presses. The stamping stations of the first stamping press (4), the second stamping press (6) and the third stamping press (8) are respectively equipped with stamping and stretching dies of corresponding specifications from coarse to fine. The first stamping press (4), the second stamping press (6) and the third stamping press (8) can all be equipped with a ring hydraulic ejector platform that can be raised and lowered on the outside of the bottom die of the stamping and stretching die.

3. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The bottle feeding mechanism (9) includes two side slide rails (91), an electric toothed belt (92), a liftable gantry (93), an electric push rod (94), and a magnetic arm (95). The lower ends of the two side slide rails (91) are fixedly connected to the frame of the corresponding conveyor belt. The upper ends of the two side slide rails (91) are provided with electric toothed belts (92). The lower ends of the liftable gantry (93) are slidably connected to the side slide rails (91). The upper belt of the electric toothed belt (92) is fixedly connected to the bottom of the liftable gantry (93). A lifting frame is slidably provided on the inner side of the liftable gantry (93). An electric push rod (94) is fixedly connected to the upper middle part of the liftable gantry (93). The output end of the electric push rod (94) is fixedly connected to the lifting frame. A horizontally placed magnetic arm (95) is fixedly connected to the bottom of the lifting frame.

4. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The bottle feeding mechanism (12) and the bottle unloading mechanism (9) have the same structure but are installed in opposite directions.

5. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The punching machine (15) and the trimming machine (10) are both existing mature equipment on the market. The punching machine (15) and the trimming machine (10) are equipped with existing magnetic bottle transfer racks. The trimming machine (10) is equipped with a discharge table (17) on the side away from the punching machine (15).

6. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The magnetic feeding mechanism (2) includes an electric cantilever frame (21), a cantilever beam (22), an electric slide (23), a pneumatic telescopic cantilever (24), an elastic connecting frame (25), and an electromagnetic feeding head (26). The lower ends of the electric cantilever frame (21) are fixedly connected to the upper parts of the feeding frame (1) and the disc loading platform (3), respectively. A movable cantilever beam (22) is provided in the upper middle part of the cantilever frame (21), and an electric slide (23) is movably provided below the cantilever beam (22). A pneumatic telescopic cantilever (24) is fixedly connected below the electric slide (23). An elastic connecting frame (25) is fixedly connected to the lower output end of the pneumatic telescopic cantilever (24). An electromagnetic feeding head (26) is fixedly connected to the end of the elastic connecting frame (25) away from the pneumatic telescopic cantilever (24).

7. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The bottle transfer mechanism (16) includes a fixed slide (161), a transverse slide (162), a pneumatic lifting frame (163), an L-shaped lifting arm (164), and an arc-shaped electromagnet (165). The transverse slide (162) is longitudinally slidably connected above the fixed slide (161). The pneumatic lifting frame (163) is transversely slidably connected above the transverse slide (162). The L-shaped lifting arm (164) is slidably connected to the side of the pneumatic lifting frame (163) near the discharge conveyor belt (13). The arc-shaped electromagnet (165) is rotatably connected to the end of the L-shaped lifting arm (164) near the discharge conveyor belt (13). A drive cylinder is provided at the end of the fixed slide (161), the transverse slide (162), and the pneumatic lifting frame (163). A drive motor is provided at the connection between the L-shaped lifting arm (164) and the arc-shaped electromagnet (165).

8. The production line for stretching, trimming, and punching fire extinguisher bottles according to claim 1, characterized in that: The disc loading platform (3) includes an electric roller frame (31), a lifting grid frame (32), an alloy air pipe (33), and a hydraulic lifting seat (35). Multiple electric drive rollers are arranged above the electric roller frame (31). A hydraulic lifting seat (35) is fixedly connected to one end of the electric roller frame (31) near the first press (4). A lifting grid frame (32) is fixedly connected above the hydraulic lifting seat (35). A grid plate is arranged above the lifting grid frame (32) at a position corresponding to the gap between the multiple electric drive rollers. Alloy air pipes (33) are arranged above both sides of the electric roller frame (31). Air jet holes are arranged above the two alloy air pipes (33).

9. A production line for stretching, trimming, and punching fire extinguisher bottles according to claim 8, characterized in that: The disc feeding mechanism (19) includes a fixed slide (191), a pneumatic pusher (192), a lifting cylinder (193), a pneumatic suction cup (194), and a pusher cylinder (195). The bottom of the fixed slide (191) is fixedly connected to the top of the electric roller frame (31). The pneumatic pusher (192) is slidably connected to the inner side of the upper part of the fixed slide (191). The pusher cylinder (195) is fixedly connected to the upper end of the fixed slide (191) away from the first press (4). The output end of the pusher cylinder (195) is fixedly connected to the pneumatic pusher (192). The lifting cylinder (193) is fixedly connected to the middle part of the pneumatic pusher (192). The lower output end of the lifting cylinder (193) passes through the pneumatic pusher (192) and is fixedly connected to the pneumatic suction cup (194).

10. A production line for stretching, trimming, and punching fire extinguisher bottles according to claim 9, characterized in that: The first press (4) is fixedly connected to a feeding hopper (14) at one end near the first feeding conveyor belt (5), and the pneumatic pusher (192) is fixedly connected to an arc-shaped push rod at one end near the first press (4).

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