Oil tank strap punching, bending and welding continuous machining production line and production method

Abstract

The invention relates to the technical field of oil tank strap machining, and discloses an oil tank strap stamping, bending and welding continuous machining production line which comprises a workbench, a stamping table, a bending wall and a welding table are installed on the top face of the workbench, a limiting column is installed on the top face of the stamping table, a top plate is installed on the top face of the limiting column, and a first hydraulic cylinder is installed on the top face of the top plate. An output shaft of the first hydraulic cylinder is connected with an upper die plate, a second hydraulic cylinder is mounted on the top face of the bending wall, a bottom plate is mounted on the front side face of the bending wall, and a first sliding groove and a mounting groove are formed in the front side face of the bending wall. According to the continuous machining production line for punching, bending and welding the oil tank strap, the first hydraulic cylinder is started, an output shaft of the first hydraulic cylinder can drive the upper die plate to move in the vertical direction, then a workpiece can be effectively punched, and four limiting columns can effectively limit the moving position of the upper die plate; and the stability and the accuracy of the stamping process are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of fuel tank band processing, in particular to a fuel tank band stamping, bending and welding continuous processing production line and a production method. Background Art

[0002] A fuel tank band is a device used to fix and support fuel tanks. It is widely used in various mechanical equipment. It is usually made of high-strength materials, such as stainless steel or other metals with strong corrosion resistance, to ensure that it can remain stable under various working conditions. The main function of the fuel tank band is to ensure the stability of the fuel tank during operation and prevent the fuel tank from moving or tipping over due to vibration or impact. It can also reduce noise and vibration and improve the overall efficiency of the fuel system. The processing of fuel tank bands usually involves multiple processes, including stamping, bending, welding, etc. In order to improve the production efficiency and product quality of fuel tank bands, improve equipment utilization, and reduce labor costs, a continuous processing production line and production method for stamping, bending and welding of fuel tank bands are proposed.

[0003] According to the search, the Chinese patent document, announcement number: CN110977354A, discloses a production process for a fuel tank hoop, which is to take out the tank hoop from the forming mold, make the molded part taken out from the forming mold into a blank by hot forging and hot pressing, and then score and cut the blank according to the diameter of the top and bottom of the fuel tank, and quench it. However, in actual use, the device cannot perform processes such as stamping, bending and welding on the hoop, which are important links to improve the production efficiency and product quality of the fuel tank hoop; and the process requires additional labor and multiple equipment to carry out, which not only increases unnecessary costs, but also affects the overall processing efficiency and equipment utilization. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a continuous processing production line and production method for stamping, bending and welding of fuel tank bands, which has the advantages of improving production efficiency and product quality, improving equipment utilization, reducing labor costs, etc., and solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of improving production efficiency and product quality, improving equipment utilization, and reducing labor costs, the present invention provides the following technical solutions: a continuous processing production line for stamping, bending and welding of oil tank bands, comprising a workbench, a stamping table, a bending wall and a welding table are fixedly installed on the top surface of the workbench, a limiting column is fixedly installed on the top surface of the stamping table, a top plate is fixedly installed on the top surface of the limiting column, a first hydraulic cylinder is fixedly installed on the top surface of the top plate, an upper mold plate is fixedly connected to the output shaft of the first hydraulic cylinder, a second hydraulic cylinder is fixedly installed on the top surface of the bending wall, a bottom plate is fixedly installed on the front side surface of the bending wall, a first slide groove and an installation groove are opened on the front side surface of the bending wall, a fixed pressure plate is slidably installed inside the first slide groove, A first bending column is installed inside the installation groove, a first motor is fixedly installed on the rear side of the bending wall, a turntable is fixedly connected to the output shaft of the first motor, a second bending column is fixedly installed on the front side of the turntable, a lifting platform and a vertical plate are installed on the top surface of the welding table, a second motor is fixedly installed on the right side of the vertical plate, a second slide groove is opened inside the vertical plate, a threaded rod and a first slider are installed inside the second slide groove, a guide rail is fixedly installed on the front side of the first slider, a third hydraulic cylinder is fixedly installed on the front side of the guide rail, a second slider is slidably installed on the outer side of the guide rail, an electric welding machine is fixedly installed on the left side of the second slider, and a fourth hydraulic cylinder and a fifth hydraulic cylinder are fixedly installed on the bottom surface of the workbench.

[0008] Preferably, there are four limiting columns, and the upper mold plate is slidably mounted on the outer sides of the four limiting columns.

[0009] Through the above technical solution, when the first hydraulic cylinder is started, the output shaft of the first hydraulic cylinder can drive the upper mold plate to move in the vertical direction, so that the workpiece can be effectively stamped, and the four limit columns can effectively limit the moving position of the upper mold plate, ensuring the stability and accuracy of the stamping process.

[0010] Preferably, the number of the fourth hydraulic cylinders is multiple, the output shafts of the multiple fourth hydraulic cylinders are fixedly connected with ejectors, and a stamping groove is opened on the top surface of the stamping table, and the multiple ejectors are installed inside the stamping groove.

[0011] Through the above technical solution, when the workpiece is punched into the inside of the stamping groove, multiple fourth hydraulic cylinders are started. The output shaft of the fourth hydraulic cylinder can drive the ejector pin to move upward, and the multiple ejector pins can then eject the formed workpiece from the stamping groove, thereby improving the overall convenience and work efficiency of the device.

[0012] Preferably, the output shaft of the second hydraulic cylinder is fixedly connected to the top surface of the fixed pressure plate.

[0013] Through the above technical solution, the stamped workpiece is placed on the top surface of the base plate and the second hydraulic cylinder is started. The output shaft of the second hydraulic cylinder can drive the fixed pressure plate to move in the vertical direction, and the fixed pressure plate can then press and fix the workpiece, providing a good guarantee for the subsequent bending process.

[0014] Preferably, the number of the mounting groove, the first bending column, the first motor, the turntable and the second bending column is two.

[0015] Through the above technical solution, the two first motors are started, and the output shaft of the first motor can drive the turntable and the second bending column to rotate together. When the second bending column contacts the workpiece, it can bend it around the first bending column, thereby improving the overall working efficiency of the device.

[0016] Preferably, a plurality of limiting grooves are provided inside the installation groove, and a limiting block is provided on the outer side surface of the first bending column, and the limiting block is correspondingly installed inside the limiting groove.

[0017] Through the above technical solution, the two first bending columns and the limit blocks are inserted into different limit grooves, so that the bending length and angle of the workpiece can be effectively adjusted, thereby improving the overall practicality of the device.

[0018] Preferably, the output shaft of the second motor is fixedly connected to the right end of the threaded rod, and the first sliding block is threadedly connected to the outer side surface of the threaded rod.

[0019] Through the above technical solution, when the second motor is started, the output shaft of the second motor can drive the threaded rod to rotate, and the threaded rod can then drive the first slider and parts such as the welding machine to move horizontally, so that welding processing can be performed on different positions of the workpiece, thereby improving the overall practicality and work efficiency of the device.

[0020] Preferably, the output shaft of the third hydraulic cylinder is fixedly connected to the front side of the second sliding block.

[0021] Through the above technical solution, when the third hydraulic cylinder is started, the output shaft of the third hydraulic cylinder can drive the second slider and the electric welder to move horizontally and longitudinally, and the electric welder can then perform welding processing on the workpiece at different positions, thereby improving the overall practicality of the device.

[0022] Preferably, there are two fifth hydraulic cylinders, and the output shafts of the two fifth hydraulic cylinders are fixedly connected to the bottom surface of the lifting platform.

[0023] Through the above technical solution, when the two fifth hydraulic cylinders are started, the output shaft of the fifth hydraulic cylinder can drive the lifting platform and the workpiece to move in the vertical direction, thereby effectively sending workpieces of different models to the height required for welding, thereby improving the overall applicability and work efficiency of the device.

[0024] The present invention also provides a production method for continuous processing of stamping, bending and welding of a fuel tank band, which is carried out in the following steps:

[0025] S1, placing the workpiece on the top surface of the punching table and starting the first hydraulic cylinder, the first hydraulic cylinder drives the upper die plate to move downward and punches the workpiece into the inside of the punching groove, and starting the fourth hydraulic cylinder, the fourth hydraulic cylinder drives the ejector to move upward and eject the workpiece;

[0026] S2, placing the stamped workpiece on the top surface of the bottom plate and starting the second hydraulic cylinder, the second hydraulic cylinder drives the fixed pressing plate to move downward and fix the workpiece;

[0027] S3, starting the first motor to drive the turntable and the second bending column to rotate, and when the second bending column rotates, the workpiece can be bent at the first bending column;

[0028] S4, placing the bent workpiece on the top surface of the lifting platform and starting the fifth hydraulic cylinder, which can drive the lifting platform and the workpiece to move upward together;

[0029] S5. Start the second motor to drive the threaded rod to rotate, and the threaded rod drives the first slider and the welding machine and other parts to move horizontally. Start the third hydraulic cylinder to drive the second slider to move, and the second slider drives the welding machine to move horizontally and longitudinally.

[0030] Compared with the prior art, the present invention provides a continuous processing production line and production method for stamping, bending and welding of fuel tank bands, which has the following beneficial effects:

[0031] 1. The present invention provides a continuous processing production line and production method for stamping, bending and welding of fuel tank bands. By placing a workpiece on the top surface of a stamping table and starting a first hydraulic cylinder, the output shaft of the first hydraulic cylinder can drive the upper mold plate to move in a vertical direction, thereby effectively performing stamping processing on the workpiece, and four limit columns can effectively limit the position of the upper mold plate, thereby ensuring the stability and accuracy of the stamping process; then, multiple fourth hydraulic cylinders are started, and the output shafts of the fourth hydraulic cylinders can drive the ejector pins to move upward, and multiple ejector pins can eject the formed workpiece from the stamping groove, thereby improving the overall convenience and work efficiency of the device.

[0032] 2. The present invention provides a continuous processing production line and production method for stamping, bending and welding of oil tank bands. By placing the stamped workpiece on the top surface of the base plate and starting the second hydraulic cylinder, the output shaft of the second hydraulic cylinder can drive the fixed pressure plate to move in the vertical direction, and the fixed pressure plate can then press and fix the workpiece, providing a good guarantee for the subsequent bending processing; starting the two first motors, the output shaft of the first motor can drive the turntable and the second bending column to rotate together, and when the second bending column contacts the workpiece, it can be bent around the first bending column; in addition, the two first bending columns and the limit blocks are inserted into different limit grooves, so that the length and angle of the workpiece bending can be effectively adjusted, thereby improving the overall practicality of the device.

[0033] 3. The continuous processing production line and production method for stamping, bending and welding of oil tank bands provided by the present invention, by starting two fifth hydraulic cylinders, the output shafts of the fifth hydraulic cylinders can drive the lifting platform and the workpiece to move in the vertical direction, thereby effectively delivering workpieces of different types to the height required for welding; then the second motor and the third hydraulic cylinder are started, the output shaft of the second motor can drive the threaded rod to rotate, and the threaded rod can then drive the first slider and parts such as the electric welder to move horizontally, and the output shaft of the third hydraulic cylinder can drive the second slider and the electric welder to move horizontally and longitudinally, and the electric welder can then perform welding processing on the workpiece at different positions, thereby improving the overall practicality and work efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention;

[0035] Figure 2 It is a front cross-sectional schematic diagram of the parts such as the punching table of the structure of the present invention;

[0036] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the bent wall and other parts of the structure of the present invention;

[0037] Figure 4 It is a three-dimensional schematic diagram of the parts such as the installation slot of the structure of the present invention;

[0038] Figure 5 It is a three-dimensional cross-sectional schematic diagram of the vertical plate and other parts of the structure of the present invention;

[0039] Figure 6 It is a front cross-sectional schematic diagram of the structural welding platform and other parts of the present invention.

[0040] Among them: 1. workbench; 2. stamping table; 3. bending wall; 4. welding table; 5. limit column; 6. top plate; 7. first hydraulic cylinder; 8. upper mold plate; 9. second hydraulic cylinder; 10. bottom plate; 11. first slide; 12. mounting groove; 13. fixed pressure plate; 14. first bending column; 15. first motor; 16. turntable; 17. second bending column; 18. lifting platform; 19. vertical plate; 20. second motor; 21. second slide; 22. threaded rod; 23. first slider; 24. guide rail; 25. third hydraulic cylinder; 26. second slider; 27. electric welder; 28. fourth hydraulic cylinder; 29. ​​fifth hydraulic cylinder; 30. ejector pin; 31. stamping groove; 32. limit groove; 33. limit block. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-2 The fuel tank band stamping, bending and welding continuous processing production line comprises a workbench 1, on the top surface of which a stamping table 2, a bending wall 3 and a welding table 4 are fixedly installed in sequence, a limiting column 5 is fixedly installed on the top surface of the stamping table 2, a top plate 6 is fixedly installed on the top surface of the limiting column 5, a first hydraulic cylinder 7 is fixedly installed on the top surface of the top plate 6, and an output shaft of the first hydraulic cylinder 7 is fixedly connected to an upper mold plate 8.

[0043] Specifically, there are four limit columns 5, and the upper die plate 8 is slidably mounted on the outer sides of the four limit columns 5. The advantage is that, through this structure, when the first hydraulic cylinder 7 is started, the output shaft of the first hydraulic cylinder 7 can drive the upper die plate 8 to move in the vertical direction, thereby effectively stamping the workpiece, and the four limit columns 5 can effectively limit the position of the upper die plate 8, ensuring the stability and accuracy of the stamping process.

[0044] A fourth hydraulic cylinder 28 is fixedly installed on the bottom surface of the workbench 1, and the number of the fourth hydraulic cylinders 28 is set to be multiple, and the output shafts of the multiple fourth hydraulic cylinders 28 are all fixedly connected with ejectors 30, and a stamping groove 31 is opened on the top surface of the stamping table 2, and the multiple ejectors 30 are installed inside the stamping groove 31. The advantage is that through this structure, when the workpiece is stamped into the inside of the stamping groove 31, the multiple fourth hydraulic cylinders 28 are started, and the output shafts of the fourth hydraulic cylinders 28 can drive the ejectors 30 to move upward, and the multiple ejectors 30 can then eject the formed workpiece from the stamping groove 31, thereby improving the overall convenience and work efficiency of the device.

[0045] like Figure 3-4 A second hydraulic cylinder 9 is fixedly installed on the top surface of the bending wall 3 shown, a bottom plate 10 is fixedly installed on the front side of the bending wall 3, a first slide groove 11 and a mounting groove 12 are opened on the front side of the bending wall 3, a fixed pressure plate 13 is slidably installed inside the first slide groove 11, a first bending column 14 is installed inside the mounting groove 12, a first motor 15 is fixedly installed on the rear side of the bending wall 3, an output shaft of the first motor 15 is fixedly connected to a turntable 16, and a second bending column 17 is fixedly installed on the front side of the turntable 16.

[0046] Specifically, the output shaft of the second hydraulic cylinder 9 is fixedly connected to the top surface of the fixed platen 13. The advantage is that, through this structure, the workpiece after stamping is placed on the top surface of the bottom plate 10 and the second hydraulic cylinder 9 is started. The output shaft of the second hydraulic cylinder 9 can drive the fixed platen 13 to move in the vertical direction, and the fixed platen 13 can then press and fix the workpiece, providing a good guarantee for the subsequent bending process.

[0047] There are two mounting slots 12, first bending columns 14, first motors 15, turntables 16, and second bending columns 17. By starting the two first motors 15 through this structure, the output shafts of the first motors 15 can drive the turntables 16 and the second bending columns 17 to rotate together. When the second bending columns 17 contact the workpiece, they can bend it around the first bending columns 14, thereby improving the overall working efficiency of the device.

[0048] A plurality of limit slots 32 are provided inside the installation slot 12, and a limit block 33 is provided on the outer side of the first bending column 14, and the limit block 33 is correspondingly installed inside the limit slot 32. By inserting the two first bending columns 14 and the limit block 33 into different limit slots 32, the length and angle of the workpiece bending can be effectively adjusted, thereby improving the overall practicality of the device.

[0049] like Figure 5-6 The top surface of the welding table 4 shown is installed with a lifting platform 18 and a vertical plate 19, a second motor 20 is fixedly installed on the right side of the vertical plate 19, a second slide groove 21 is opened inside the vertical plate 19, a threaded rod 22 and a first slider 23 are installed inside the second slide groove 21, a guide rail 24 is fixedly installed on the front side of the first slider 23, a third hydraulic cylinder 25 is fixedly installed on the front side of the guide rail 24, a second slider 26 is slidably installed on the outer side of the guide rail 24, and an electric welding machine 27 is fixedly installed on the left side of the second slider 26.

[0050] Specifically, the output shaft of the second motor 20 is fixedly connected to the right end of the threaded rod 22, and the first slider 23 is threadedly connected to the outer surface of the threaded rod 22. Through this structure, when the second motor 20 is started, the output shaft of the second motor 20 can drive the threaded rod 22 to rotate, and the threaded rod 22 can then drive the first slider 23 and the welding machine 27 and other parts to move horizontally, so that welding can be performed on different positions of the workpiece, thereby improving the overall practicality and work efficiency of the device.

[0051] The output shaft of the third hydraulic cylinder 25 is fixedly connected to the front side of the second slider 26. Through this structure, when the third hydraulic cylinder 25 is started, the output shaft of the third hydraulic cylinder 25 can drive the second slider 26 and the electric welder 27 to move in the horizontal and longitudinal directions, and the electric welder 27 can then perform welding processing on the workpiece at different positions, thereby improving the overall practicality of the device.

[0052] The bottom surface of the workbench 1 is fixedly mounted with a fifth hydraulic cylinder 29, and the number of the fifth hydraulic cylinders 29 is set to two, and the output shafts of the two fifth hydraulic cylinders 29 are fixedly connected to the bottom surface of the lifting platform 18. Through this structure, when the two fifth hydraulic cylinders 29 are started, the output shafts of the fifth hydraulic cylinders 29 can drive the lifting platform 18 and the workpiece to move in the vertical direction, thereby effectively delivering workpieces of different models to the height required for welding, thereby improving the overall applicability and work efficiency of the device.

[0053] The production method of the continuous processing of stamping, bending and welding of the fuel tank band is carried out according to the following steps:

[0054] S1, placing the workpiece on the top surface of the punching table 2 and starting the first hydraulic cylinder 7, the first hydraulic cylinder 7 drives the upper die plate 8 to move downward and punch the workpiece into the inside of the punching groove 31, and starting the fourth hydraulic cylinder 28, the fourth hydraulic cylinder 28 drives the ejector pin 30 to move upward and eject the workpiece;

[0055] S2, placing the stamped workpiece on the top surface of the bottom plate 10 and starting the second hydraulic cylinder 9, the second hydraulic cylinder 9 drives the fixed pressing plate 13 to move downward and fix the workpiece;

[0056] S3, starting the first motor 15 to drive the turntable 16 and the second bending column 17 to rotate, and when the second bending column 17 rotates, the workpiece can be bent at the first bending column 14;

[0057] S4, placing the bent workpiece on the top surface of the lifting platform 18 and starting the fifth hydraulic cylinder 29, the fifth hydraulic cylinder 29 can drive the lifting platform 18 and the workpiece to move upward together;

[0058] S5. Start the second motor 20 to drive the threaded rod 22 to rotate, and the threaded rod 22 drives the first slider 23 and the welding machine 27 and other parts to move horizontally. Start the third hydraulic cylinder 25 to drive the second slider 26 to move, and the second slider 26 drives the welding machine 27 to move horizontally.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous processing production line for stamping, bending and welding of fuel tank bands, comprising a workbench (1), characterized in that: The top surface of the workbench (1) is fixedly mounted with a punching table (2), a bending wall (3) and a welding table (4); the top surface of the punching table (2) is fixedly mounted with a limiting column (5); the top surface of the limiting column (5) is fixedly mounted with a top plate (6); the top surface of the top plate (6) is fixedly mounted with a first hydraulic cylinder (7); the output shaft of the first hydraulic cylinder (7) is fixedly connected with an upper mold plate (8); the top surface of the bending wall (3) is fixedly mounted with a second hydraulic cylinder (9); the front side surface of the bending wall (3) is fixedly mounted with a bottom plate (10); the front side surface of the bending wall (3) is provided with a first slide groove (11) and an installation groove (12); a fixed pressing plate (13) is slidably mounted inside the first slide groove (11); a first bending column (14) is mounted inside the installation groove (12); a first motor (15) is fixedly mounted on the rear side surface of the bending wall (3); the first motor ( The output shaft of the welding table (15) is fixedly connected to a turntable (16), a second bending column (17) is fixedly installed on the front side of the turntable (16), a lifting platform (18) and a vertical plate (19) are installed on the top surface of the welding table (4), a second motor (20) is fixedly installed on the right side of the vertical plate (19), a second slide groove (21) is provided inside the vertical plate (19), a threaded rod (22) and a first slider (23) are installed inside the second slide groove (21), a guide rail (24) is fixedly installed on the front side of the first slider (23), a third hydraulic cylinder (25) is fixedly installed on the front side of the guide rail (24), a second slider (26) is slidably installed on the outer side of the guide rail (24), an electric welding machine (27) is fixedly installed on the left side of the second slider (26), and a fourth hydraulic cylinder (28) and a fifth hydraulic cylinder (29) are fixedly installed on the bottom surface of the workbench (1).

2. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The number of the limiting columns (5) is four, and the upper mold plate (8) is slidably mounted on the outer sides of the four limiting columns (5).

3. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The fourth hydraulic cylinder (28) is provided in plurality, the output shafts of the plurality of fourth hydraulic cylinders (28) are all fixedly connected with ejector pins (30), and a punching groove (31) is provided on the top surface of the punching platform (2), and the plurality of ejector pins (30) are all installed inside the punching groove (31).

4. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The output shaft of the second hydraulic cylinder (9) is fixedly connected to the top surface of the fixed pressure plate (13).

5. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The number of the mounting groove (12), the first bending column (14), the first motor (15), the turntable (16) and the second bending column (17) is two.

6. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: A plurality of limit grooves (32) are provided inside the installation groove (12), and a limit block (33) is provided on the outer side surface of the first bending column (14), and the limit block (33) is correspondingly installed inside the limit groove (32).

7. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The output shaft of the second motor (20) is fixedly connected to the right end of the threaded rod (22), and the first sliding block (23) is threadedly connected to the outer surface of the threaded rod (22).

8. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The output shaft of the third hydraulic cylinder (25) is fixedly connected to the front side of the second sliding block (26).

9. The fuel tank band stamping, bending and welding continuous processing production line according to claim 1 is characterized by: The number of the fifth hydraulic cylinders (29) is two, and the output shafts of the two fifth hydraulic cylinders (29) are fixedly connected to the bottom surface of the lifting platform (18).

10. A production method for continuously processing fuel tank bands by punching, bending, and welding, using a production line for continuously processing fuel tank bands by punching, bending, and welding as claimed in any one of claims 1 to 9, characterized in that: Proceed as follows: S1, placing the workpiece on the top surface of the punching table (2) and starting the first hydraulic cylinder (7), the first hydraulic cylinder (7) drives the upper mold plate (8) to move downward and punch the workpiece into the inside of the punching groove (31), starting the fourth hydraulic cylinder (28), the fourth hydraulic cylinder (28) drives the ejector pin (30) to move upward and eject the workpiece; S2, placing the punched workpiece on the top surface of the bottom plate (10) and starting the second hydraulic cylinder (9), the second hydraulic cylinder (9) drives the fixed pressing plate (13) to move downward and fix the workpiece; S3, starting the first motor (15) to drive the turntable (16) and the second bending column (17) to rotate, and when the second bending column (17) rotates, the workpiece can be bent at the first bending column (14); S4, placing the bent workpiece on the top surface of the lifting platform (18) and starting the fifth hydraulic cylinder (29), so that the fifth hydraulic cylinder (29) can drive the lifting platform (18) and the workpiece to move upward together; S5, starting the second motor (20) to drive the threaded rod (22) to rotate, the threaded rod (22) drives the first slider (23) and the electric welder (27) and other parts to move horizontally, starting the third hydraulic cylinder (25) to drive the second slider (26) to move, the second slider (26) drives the electric welder (27) to move horizontally.

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