Punching and tapping special machine for producing cart elbow pipe structures
By designing a punching tapping special machine including shrinking pipe, punching, tapping, visual inspection and automatic load transfer mechanism, the problem of difficulty in processing double-bent pipe fittings with space angle in the prior art is solved, and automated production is achieved, efficiency and quality are improved, and costs are reduced.
Patent Information
- Application Number
- CN202422233574.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The prior art is difficult to effectively process double-bent pipe fittings with space angles and pipe openings with cover openings, and the requirements of high quality, high efficiency and low cost cannot be achieved during mass production.
A punching and tapping special machine including a shrinking tube assembly, a punching component, a tapping component, a visual inspection mechanism and an automatic load transfer mechanism is designed. The pressing and processing of the bent tube is achieved through hydraulic cylinders and a tightening die, and automated production is achieved through PLC and sensor control systems.
Automatic processing of double-bent pipe fittings is realized, manual intervention is reduced, product quality is ensured, production efficiency is improved, costs are reduced, and the demand for mass production is met.
Smart Images
Figure CN223029041U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing of bent pipes for trolleys, in particular to a special punching and tapping machine for producing the structural bent pipes for trolleys. Background Art
[0002] At present, for the punching and tapping of metal products of double-bent pipe structure products on trolley household products, the general equipment or special machines in factories are all used for processing pipe fittings at a vertical angle. For the punching and tapping of double-bent pipe fittings with a spatial angle and a wrapped pipe mouth, special customized molds are required for processing, and it is not possible to form a dedicated line connection processing well. The unqualified products after processing still need to be picked by hand, and the quality problems caused by human neglect cannot be excluded. The labor cost is high and the efficiency is low, and the requirements of high quality, high efficiency and low cost in large-scale processing by factories cannot be achieved. Summary of the Utility Model
[0003] The utility model aims to provide a special punching and tapping machine for producing the structural bent pipes for trolleys to overcome or at least partially solve the above problems.
[0004] To achieve the above object, the technical solution of the utility model is specifically realized as follows:
[0005] The utility model provides a special punching and tapping machine for producing the structural bent pipes for trolleys, which includes a pipe shrinking assembly, a punching assembly, a tapping assembly, a vision inspection mechanism, an automatic transfer mechanism, a main frame and a protective cover. The pipe shrinking assembly, the punching assembly, the tapping assembly, the vision inspection mechanism, the automatic transfer mechanism and the main frame are all arranged inside the protective cover. The pipe shrinking assembly, the punching assembly, the tapping assembly, the vision inspection mechanism and the automatic transfer mechanism are all installed on the main frame. The automatic transfer mechanism is arranged on the upper side of the main frame. The pipe shrinking assembly, the punching assembly, the tapping assembly and the vision inspection mechanism are all arranged on the front side of the main frame, and the pipe shrinking assembly, the punching assembly, the tapping assembly and the vision inspection mechanism are arranged in sequence from right to left;
[0006] The pipe shrinking assembly is used for the secondary pipe shrinking treatment of the ports of the bent pipes after double bending, and is divided into left and right groups to simultaneously shrink the two ports of the pipe fittings;
[0007] The punching assembly is used for punching the shrunk part of the bent pipe fittings after double bending;
[0008] The tapping assembly is used for tapping the processed parts that have completed the punching process in the previous step;
[0009] The vision inspection mechanism is located after the tapping process, and is used for fully inspecting the processed parts that have completed the tapping process in the previous step, removing unqualified parts, and ensuring a 100% qualified rate of the workpieces;
[0010] The automatic transfer mechanism is used to transfer the workpieces completed in the previous process to the next process, so as to complete the feeding and discharging of the products.
[0011] As a further solution of the present utility model, it further includes a hydraulic cylinder, a lower pressing die and an upper pressing die. The hydraulic cylinder is fixedly installed on the main frame through a fixing plate, and an upper pressing die is connected to the hydraulic rod on the lower side of the hydraulic cylinder. A corresponding lower pressing die is arranged on the lower side of the upper pressing die. The lower pressing die is fixedly installed on the main frame. Profiled tracks are designed between the upper pressing die and the lower pressing die and are matched with the bent pipe part of the pipe fitting.
[0012] As a further solution of the present utility model, the pipe shrinking assembly includes a pipe shrinking female die, a first cylinder, a first die holder and a first slide rail assembly. The first cylinder is fixed on the front side of the main frame through a fixing seat, and the telescopic rod on the first cylinder is fixedly connected to the first die holder. The back of the first die holder is slidably connected to the main frame through the first slide rail assembly. A pipe shrinking female die is fixedly connected to the upper side of the first die holder. There are two groups of the pipe shrinking female dies. One group has one pipe shrinking port, and the other group has two pipe shrinking ports, which can shrink the pipes at the ports with different center dimensions of the two side bent pipes respectively. The pipe shrinking female die is located under the upper hydraulic cylinder on the rightmost side.
[0013] As a further solution of the present utility model, the punching assembly includes a punch, a core rod, a second die holder, a second cylinder and a second slide rail assembly. The second slide rail assembly is connected to the front side of the main frame, and the telescopic rod of the second cylinder is connected to the lower side of the second slide rail assembly. The second cylinder is fixedly installed on the main frame. A second die holder is also fixed on the front side of the second slide rail assembly. A punch and a core rod are connected to the second die holder. The punch is arranged on one side of the core rod.
[0014] As a further solution of the present utility model, the tapping assembly includes a servo tapping machine and a third slide rail assembly. The servo tapping machine is arranged on the front side of the main frame, and the back of the servo tapping machine is connected to the third slide rail assembly, and the servo tapping machine is slidably connected to the main frame through the third slide rail assembly.
[0015] As a further solution of the present utility model, the vision detection mechanism includes an external frame and a detection device. The detection device is arranged inside the external frame. The external frame is fixedly connected to the front side of the main frame. The detection device is connected to the main frame.
[0016] As a further solution of the present utility model, the automatic transfer mechanism includes a fourth slide rail assembly, a third cylinder, and a mechanical claw. The fourth slide rail assembly is installed on a support frame, and the support frame is fixedly installed on the main frame. A third cylinder is slidably connected to the front side of the fourth slide rail assembly. A mechanical claw is connected to the telescopic rod on the lower side of the third cylinder. There are three third cylinders, and the three third cylinders are connected in sequence from top to bottom. The upper cylinder is responsible for the up and down movement of the mechanical claw, the middle cylinder is responsible for the front and back movement of the mechanical claw, and the lower cylinder is responsible for the grasping and releasing actions of the mechanical claw.
[0017] As a further solution of the present utility model, it further includes a control system. The control system is composed of a PLC and sensors, and is respectively connected to the pipe shrinking assembly, the punching assembly, the tapping assembly, the vision detection mechanism, and the automatic transfer mechanism, for controlling all actions of the entire equipment, realizing simple and efficient control of the entire mechanism. For processing elbow pipe fittings of different sizes, it can be switched with one key. The control method is simple, reliable, and efficient.
[0018] The present utility model provides a special punching and tapping machine for producing cart elbow pipe structures, and the beneficial effects are as follows:
[0019] It realizes unmanned feeding and unmanned operation of pipe fitting processing. In cooperation with the vision detection mechanism, it can replace manual labor to conduct full inspection of products, reduce the influence of human factors on product quality, and fully ensure product quality. By using the automatic transfer mechanism in combination, it can maximize production efficiency, reduce costs, and meet the requirements of mass production; it solves the problem of one-time punching and tapping of double elbow pipe fittings with spatial angles and pipe mouth wrapping processes on cart-type household products, as well as the one-key switching for processing elbow pipes of different sizes. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0021] Figure 1 It is a structural schematic diagram of the present utility model.
[0022] Figure 2 It is a structural schematic diagram of the main frame in the present utility model.
[0023] Figure 3 It is a structural schematic diagram of the pipe shrinking assembly located at the main frame position in the present utility model.
[0024] Figure 4This is a schematic structural diagram of the pipe shrinking assembly in the present utility model.
[0025] Figure 5 This is a schematic structural diagram of the punching assembly located at the main frame position in the present utility model.
[0026] Figure 6 This is a schematic structural diagram of the punching assembly in the present utility model.
[0027] Figure 7 This is a partially enlarged schematic structural diagram of the punch and the mandrel in the present utility model.
[0028] Figure 8 This is a schematic structural diagram of the tapping assembly in the present utility model.
[0029] Figure 9 This is a schematic structural diagram of the vision inspection mechanism in the present utility model.
[0030] Figure 10 This is a schematic structural diagram of the detection device in the present utility model.
[0031] Figure 11 This is a schematic structural diagram of the automatic transfer mechanism in the present utility model.
[0032] In the figure: 1. Pipe shrinking assembly; 2. Punching assembly; 3. Tapping assembly; 4. Vision inspection mechanism; 5. Automatic transfer mechanism; 6. Main frame; 7. Protective cover; 8. Hydraulic cylinder; 9. Lower pressing die; 10. Upper pressing die; 11. Necking female die; 12. First cylinder; 13. First die holder; 14. First slide rail assembly; 15. Pipe fitting; 21. Punch; 22. Mandrel; 23. Second die holder; 24. Second cylinder; 25. Second slide rail assembly; 31. Servo tapping machine; 32. Third slide rail assembly; 41. External frame; 42. Detection device; 51. Fourth slide rail assembly; 52. Third cylinder; 53. Mechanical claw; 81. Fixed plate. Detailed implementation manners
[0033] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.
[0034] See Figures 1-11The utility model provides a punching and tapping machine for producing a cart curved tube structure, comprising a tube shrinking assembly 1, a punching assembly 2, a tapping assembly 3, a visual inspection mechanism 4, an automatic transfer mechanism 5, a main frame 6 and a protective cover 7. The tube shrinking assembly 1, the punching assembly 2, the tapping assembly 3, the visual inspection mechanism 4, the automatic transfer mechanism 5 and the main frame 6 are all arranged inside the protective cover 7, the tube shrinking assembly 1, the punching assembly 2, the tapping assembly 3, the visual inspection mechanism 4 and the automatic transfer mechanism 5 are all installed on the main frame 6, the automatic transfer mechanism 5 is arranged on the upper side of the main frame 6, the tube shrinking assembly 1, the punching assembly 2, the tapping assembly 3 and the visual inspection mechanism 4 are all arranged on the front side of the main frame 6, and the tube shrinking assembly 1, the punching assembly 2, the tapping assembly 3 and the visual inspection mechanism 4 are arranged in sequence from right to left;
[0035] The tube shrinking assembly 1 is used for secondary tube shrinking of the ports of the double-bent tube fitting 15, and is divided into two groups, left and right, for shrinking the two ports of the tube fitting 15 simultaneously;
[0036] The punching assembly 2 is used to perform a punching process on the shrinkage of the double-bent pipe 15;
[0037] The tapping assembly 3 is used to perform a tapping process on a workpiece that has completed a punching process in the previous process;
[0038] The visual inspection mechanism 4 is located after the tapping process and is used to conduct a full inspection of the workpieces that have been tapped, remove unqualified parts, and ensure a 100% qualified rate of the workpieces;
[0039] The automatic transfer mechanism 5 is used to transfer the workpiece processed in the previous process to the next process, so as to complete the loading and unloading of the product.
[0040] It also includes a hydraulic cylinder 8, a lower clamping die 9 and an upper clamping die 10. The hydraulic cylinder 8 is fixedly mounted on the main frame 6 through a fixing plate 81, and the upper clamping die 10 is connected to the hydraulic rod on the lower side of the hydraulic cylinder 8. The lower side of the upper clamping die 10 is provided with a lower clamping die 9 corresponding thereto, and the lower clamping die 9 is fixedly mounted on the main frame 6. A contoured track is designed between the upper clamping die 10 and the lower clamping die 9, and is matched with the bend of the pipe fitting 15. The clamping force is designed to act on the edge of the main frame 6, and is clamped at 45°. The clamping designed at this position can realize the same special machine processing of two bends of different sizes on one side of the pipe fitting 15.
[0041] It also includes a control system, which is composed of a PLC and a sensor, and is respectively connected to the tube reduction component 1, the punching component 2, the tapping component 3, the visual inspection mechanism 4 and the automatic transfer mechanism 5, for controlling all actions of the entire equipment, achieving simple and efficient control of the entire mechanism, and can switch between different sizes of bent pipes and fittings 15 with one button, and the control method is simple, reliable and efficient.
[0042] The pipe shrinking assembly 1 includes a pipe shrinking female die 11, a first cylinder 12, a first die holder 13, and a first slide rail assembly 14. The first cylinder 12 is fixed to the front side of the main frame 6 through a fixing seat, and the telescopic rod on the first cylinder 12 is fixedly connected to the first die holder 13. The back surface of the first die holder 13 is slidably connected to the main frame 6 through the first slide rail assembly 14. The upper side of the first die holder 13 is fixedly connected with the pipe shrinking female die 11. There are two groups of pipe shrinking female dies 11, one group has one pipe shrinking opening, and the other group has two pipe shrinking openings, which can respectively perform pipe shrinking on the ports with different center dimensions of the bent pipes on both sides. The pipe shrinking female die 11 is located under the upper hydraulic cylinder 8 on the rightmost side, and its function is to perform pipe shrinking on the port of the pipe fitting 15. The first slide rail assembly 14 is installed between the first die holder 13 and the main frame 6 as the movement track of the pipe shrinking female die 11. When the special machine starts, the pipe shrinking female die 11 moves upward along the track of the first slide rail assembly 14 under the action of the first cylinder 12 to perform pipe shrinking processing on the pipe fitting 15.
[0043] The punching assembly 2 includes a punch 21, a mandrel 22, a second die holder 23, a second cylinder 24, and a second slide rail assembly 25. The second slide rail assembly 25 is connected to the front side of the main frame 6, and the lower side of the second slide rail assembly 25 is connected to the telescopic rod of the second cylinder 24. The second cylinder 24 is fixedly installed on the main frame 6. The front side of the second slide rail assembly 25 is also fixed with the second die holder 23. The second die holder 23 is connected with the punch 21 and the mandrel 22. The punch 21 is arranged on one side of the mandrel 22. The punching assembly 2 is divided into left and right groups to respectively process the pipe shrinking parts of the pipe fittings 15 on both sides. By driving the punch 21 to move along the slide rail under the action of the second cylinder 24, the punching process can be performed on the workpiece.
[0044] For the punch 21 and the mandrel 22 on the punching die, since in addition to the 90° requirement in the Z direction after the pipe fitting 15 is bent, there is also an angle requirement in the Y direction, and there is also a process of covering the port at the port of the pipe fitting 15, the mandrel 22 designed conventionally cannot enter the inside of the pipe fitting 15. Therefore, when designing, the punch 21 is designed to be perpendicular to the pipe fitting 15 at 90° in the direction of the part to be processed, but the angle of the mandrel 22 is not perpendicular to that of the punch 21, with a difference of 5 - 10°. And in order to enter the pipe fitting 15, the head of the mandrel 22 is designed as a large cone. When the mandrel 22 enters the pipe fitting 15, the first contact surface with the inside of the pipe fitting 15 is designed as a circular arc surface that fits the inner wall of the pipe fitting 15 and is at 90° with the punch 21. This design can ensure that the mandrel 22 can both enter the inside of the pipe fitting 15 and fit the inner wall of the pipe, so as to facilitate punching processing. At the same time, due to the difference in the angle of 5 - 10°, the mandrel 22 will not interfere with the bent pipe port after entering the pipe fitting 15.
[0045] The tapping assembly 3 includes a servo tapping machine 31 and a third slide rail assembly 32. The servo tapping machine 31 is arranged on the front side of the main frame 6, and the back surface of the servo tapping machine 31 is connected with the third slide rail assembly 32. The servo tapping machine 31 is slidably connected with the main frame 6 through the third slide rail assembly 32. The servo tapping machine 31 is installed on the third slide rail assembly 32 and symmetrically installed, so that it can move along the direction set by the third slide rail assembly 32 for tapping.
[0046] The vision detection mechanism 4 includes an external frame 41 and a detection device 42. The detection device 42 is arranged inside the external frame 41. The external frame 41 is fixedly connected to the front side of the main frame 6. The detection device 42 is connected to the main frame 6. The external frame 41 is a semi-transparent cover, which not only isolates external personnel to prevent injury, but also has the function of aggregating light inside. The detection device 42 is used to inspect whether the pipe fitting 15 transferred is tapped. If it is qualified, it will flow into the material box normally. If it is unqualified, it will fall into the unqualified red box through the induction of the inductor. The lighting device is used for lighting the part to be detected.
[0047] The automatic transfer mechanism 5 includes a fourth slide rail assembly 51, a third cylinder 52 and a mechanical claw 53. The fourth slide rail assembly 51 is installed on the support frame, and the support frame is fixedly installed on the main frame 6. The front side of the fourth slide rail assembly 51 is slidably connected with the third cylinder 52. A mechanical claw 53 is connected to the telescopic rod on the lower side of the third cylinder 52. There are three third cylinders 52, and the three third cylinders 52 are connected in sequence from top to bottom. The upper cylinder is responsible for the up and down movement of the mechanical claw 53, the middle cylinder is responsible for the front and back movement of the mechanical claw 53, and the lower cylinder is responsible for the grasping and releasing actions of the mechanical claw 53. The fourth slide rail assembly 51 acts above the whole special machine, and 5 groups of mechanical claws 53 are evenly arranged on it. The movement of 5 groups of manipulators is driven by a servo motor.
[0048] During the use of the present utility model, the hydraulic cylinder 8, the upper pressing die 10 and the lower pressing die 9 are a group of components with the same size design as those on the pipe shrinking assembly 1, and are respectively installed on the pipe shrinking assembly 1, the punching assembly 2 and the tapping assembly 3. Their functions are the same as those on the pipe shrinking assembly 1. The upper pressing die is pressed downward at 45° by the hydraulic pressure and acts together with the lower pressing die to press the workpiece.
[0049] The workpiece to be processed is a pipe fitting 15 with double-bend forming on a trolley product, and there are different bend center distances. This workpiece needs to be subjected to secondary pipe shrinking, punching and tapping.
[0050] All devices and mechanisms are controlled by the PLC system. The mechanical jaw 53 places the workpieces grabbed from the previous process at the first pipe shrinking process. The upper pressing die 10 moves downward through the action of the hydraulic cylinder 8 and cooperates with the lower pressing die 9 to clamp the workpiece. The first cylinder 12 drives the necking die 11 to move upward and performs pipe shrinking on the bent part of the pipe fitting 15. After the pipe shrinking is completed, the first cylinder 12 resets. At the same time, the mechanical jaw 53 drives the workpiece to move to the second punching process. The mandrel 22 extends into the port of the pipe fitting 15, and the punch 21 punches the pipe fitting 15. After the punching is completed, the mechanical jaw 53 moves the workpiece to the third tapping process. The servo tapping machine 31 taps the punched position. Finally, the mechanical jaw 53 moves the workpiece to the fourth inspection process, and the inspection device 42 inspects the qualified situation of the processed workpiece.
[0051] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.
Claims
1. A punching and tapping machine for producing cart curved pipe structures, comprising a pipe shrinking assembly (1), a punching assembly (2), a tapping assembly (3), a visual inspection mechanism (4), an automatic transfer mechanism (5), a main frame (6) and a protective cover (7), characterized in that: The tube shrinking assembly (1), the punching assembly (2), the tapping assembly (3), the visual inspection mechanism (4), the automatic transfer mechanism (5) and the main frame (6) are all arranged inside the protective cover (7); the tube shrinking assembly (1), the punching assembly (2), the tapping assembly (3), the visual inspection mechanism (4) and the automatic transfer mechanism (5) are all installed on the main frame (6); the automatic transfer mechanism (5) is arranged on the upper side of the main frame (6); the tube shrinking assembly (1), the punching assembly (2), the tapping assembly (3) and the visual inspection mechanism (4) are all arranged on the front side of the main frame (6); and the tube shrinking assembly (1), the punching assembly (2), the tapping assembly (3) and the visual inspection mechanism (4) are arranged in sequence from right to left; The tube shrinking assembly (1) is used for secondary tube shrinking of the port of the double-bent tube fitting (15), and is divided into two groups, left and right, for shrinking the two ports of the tube fitting (15) simultaneously; The punching assembly (2) is used to perform a punching process on the shrinkage of the double-bent pipe (15); The tapping assembly (3) is used to perform a tapping process on a workpiece that has completed a punching process in the previous process; The visual inspection mechanism (4) is located after the tapping process and is used to perform a full inspection on the workpieces that have been tapped, remove unqualified parts, and ensure a 100% qualified rate of the workpieces; The automatic transfer mechanism (5) is used to transfer the workpiece processed in the previous process to the next process, thereby completing the loading and unloading of products.
2. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The invention also comprises a hydraulic cylinder (8), a lower pressing die (9) and an upper pressing die (10); the hydraulic cylinder (8) is fixedly mounted on the main frame (6) through a fixing plate (81); the upper pressing die (10) is connected to a hydraulic rod on the lower side of the hydraulic cylinder (8); a lower pressing die (9) corresponding to the upper pressing die (10) is arranged on the lower side of the upper pressing die (10); the lower pressing die (9) is fixedly mounted on the main frame (6); and a contoured track is designed between the upper pressing die (10) and the lower pressing die (9) and matches the bend of the pipe fitting (15).
3. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The tube shrinking assembly (1) comprises a shrinking die (11), a first cylinder (12), a first die base (13) and a first slide rail assembly (14); the first cylinder (12) is fixed to the front side of the main frame (6) through a fixed seat, and the telescopic rod on the first cylinder (12) is fixedly connected to the first die base (13); the back side of the first die base (13) is slidably connected to the main frame (6) through the first slide rail assembly (14); the upper side of the first die base (13) is fixedly connected with a shrinking die (11); the shrinking die (11) is provided with two groups, one of which is a shrinking port and the other is two shrinking ports, which can shrink the ports with different central sizes of the bent pipes on both sides respectively; the shrinking die (11) is located at the lower side of the upper hydraulic cylinder (8) on the far right.
4. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The punching assembly (2) comprises a punch (21), a core rod (22), a second die base (23), a second cylinder (24) and a second slide rail assembly (25); the second slide rail assembly (25) is connected to the front side of the main frame (6) and is connected to the telescopic rod of the second cylinder (24) at the lower side of the second slide rail assembly (25); the second cylinder (24) is fixedly mounted on the main frame (6); the second die base (23) is also fixedly mounted on the front side of the second slide rail assembly (25); the second die base (23) is connected to the punch (21) and the core rod (22); the punch (21) is arranged on one side of the core rod (22).
5. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The tapping assembly (3) comprises a servo tapping machine (31) and a third slide rail assembly (32); the servo tapping machine (31) is arranged on the front side of the main frame (6), and the back side of the servo tapping machine (31) is connected to the third slide rail assembly (32); and the servo tapping machine (31) is slidably connected to the main frame (6) via the third slide rail assembly (32).
6. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The visual inspection mechanism (4) comprises an external frame (41) and a detection device (42), wherein the detection device (42) is arranged inside the external frame (41), the external frame (41) is fixedly connected to the front side of the main frame (6), and the detection device (42) is connected to the main frame (6).
7. A punching and tapping machine for producing cart bend pipe structures according to claim 1, characterized in that: The automatic transfer mechanism (5) comprises a fourth slide rail assembly (51), a third cylinder (52) and a mechanical claw (53). The fourth slide rail assembly (51) is mounted on a support frame, and the support frame is fixedly mounted on a main frame (6). The front side of the fourth slide rail assembly (51) is slidably connected to the third cylinder (52). The mechanical claw (53) is connected to the telescopic rod on the lower side of the third cylinder (52). There are three third cylinders (52), and the three third cylinders (52) are connected in sequence from top to bottom. The upper cylinder is responsible for the up and down movement of the mechanical claw (53), the middle cylinder is responsible for the forward and backward movement of the mechanical claw (53), and the lower cylinder is responsible for the grabbing and putting down action of the mechanical claw (53).
8. A punching and tapping machine for producing cart curved pipe structures according to claim 1, characterized in that: The invention also comprises a control system, which is composed of a PLC and a sensor, and is respectively connected with the tube shrinking assembly (1), the punching assembly (2), the tapping assembly (3), the visual detection mechanism (4) and the automatic transfer mechanism (5), and is used to control all actions of the entire device, thereby achieving simple and efficient control of the entire mechanism. For processing bent pipes (15) of different sizes, switching can be performed with one key, and the control method is simple, reliable and efficient.