Semi-automatic riveting press with angle adjusting workbench

Abstract

The utility model relates to the technical field of riveting presses, and discloses a semi-automatic riveting press with an angle adjusting workbench, and the angle adjusting workbench is used for transferring a workpiece to a riveting press die; the angle adjusting workbench is matched with a lifting air cylinder through rotation and is designed in a guiding mode, automatic and accurate feeding of workpieces is achieved, and the linkage riveting mechanism is used for conducting riveting on the workpieces on the riveting dies and transferring the riveting dies on the feeding station to the riveting station. The linkage riveting mechanism comprises a riveting head, a lifting platform, a pushing block for pushing an L-shaped plate to swing, and a moving platform; in the process that the hydraulic cylinder pushes the lifting platform to move up and down, the riveting head also moves up and down, the pushing block pushes the L-shaped plate to swing, and then the moving platform is driven to move, so that the riveting die on the moving platform is switched back and forth between the feeding station and the riveting station. The linkage riveting mechanism provides stable power through the hydraulic cylinder, the structure is simplified through ingenious linkage, station switching and riveting are completed synchronously, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of riveting machine technology, specifically relating to a semi-automatic riveting machine with an angle-adjustable worktable. Background Technology

[0002] In modern manufacturing, riveting is a widely used connection method for securely joining two or more parts together. It has important applications in numerous industries, including automotive manufacturing, electronics, aerospace, and machining. With the continuous expansion of production scale and increasingly stringent product quality requirements, improving the efficiency and quality of riveting production has become a crucial issue for the manufacturing industry.

[0003] In terms of workpiece loading, traditional riveting equipment often requires manual placement of the workpiece into the riveting position, which not only increases labor costs but also results in slow loading speed and inaccurate loading positions, affecting riveting quality. Some equipment generates significant impact during the riveting process, which may cause injury to operators. In terms of station switching, some equipment uses independent drive mechanisms to control the movement of the riveting head and the station movement of the riveting die, resulting in complex equipment structure, high costs, and poor coordination and synchronization between various actions, thus reducing production efficiency.

[0004] In view of this, we propose a semi-automatic riveting machine with an angle-adjustable worktable. Utility Model Content

[0005] The present invention aims to solve the technical problems of the above-mentioned prior art riveting equipment, which relies on manual labor in the material feeding process, which not only increases labor costs and reduces the material feeding speed, but also easily causes the material feeding position deviation to affect the riveting quality. In addition, some equipment has a large riveting impact force, which poses a risk of injury to the operator. In terms of workstation switching, some equipment adopts independent drive mechanism, which results in complex structure, high cost, poor coordination and synchronization of actions, and reduced production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A semi-automatic riveting machine with an angle-adjustable worktable, comprising:

[0008] An angle-adjustable worktable is used to transfer workpieces from the feeding station to the riveting die at the loading station. The angle-adjustable worktable includes a rotary cylinder for rotating the vacuum suction cup and a lifting cylinder for raising and lowering.

[0009] The linkage riveting mechanism is used to rivet the workpiece on the riveting die and to transfer the riveting die from the loading station to the riveting station.

[0010] The linkage riveting mechanism includes a riveting head driven by a hydraulic cylinder, a lifting platform for mounting the riveting head, a push block fixed on the lifting platform and pushing the L-shaped plate to swing, and a moving platform that slides along the L-shaped guide groove on the L-shaped plate and slides in conjunction with the guide rail.

[0011] As the hydraulic cylinder pushes the lifting platform up and down, the riveting head also moves up and down, and the push block pushes the L-shaped plate to swing, thereby driving the moving platform to move, so that the riveting die on the moving platform switches back and forth between the loading station and the riveting station.

[0012] Preferably, the lifting cylinder is fixed on the rotating platform of the rotary cylinder, and the top of the piston rod of the lifting cylinder is provided with a swing plate, and the vacuum suction cup is installed at the bottom of the front end of the swing plate.

[0013] By coordinating the rotary cylinder and the lifting cylinder, the swing plate is driven to swing and rise, so that the vacuum suction cup can lower and adsorb the workpiece located at the feeding station, and can transfer the workpiece and lower it onto the riveting die.

[0014] Preferably, the rear end of the swing plate is provided with a guide plate that cooperates with the lifting cylinder to slide and lift the swing plate.

[0015] Preferably, the linkage riveting mechanism also includes a base plate and a bracket fixed on the base plate. The front side of the bracket is provided with a T-shaped mounting plate, and the hydraulic cylinder is mounted and fixed on the T-shaped mounting plate. The base plate and the rotary cylinder are both mounted on the machine platform of the riveting machine.

[0016] Preferably, the lifting platform is provided with symmetrically arranged guide sleeves on both sides, and the guide sleeves cooperate with the guide rods fixedly installed on the top of the base plate to guide the sliding motion.

[0017] Preferably, two guide rails are provided symmetrically on the left and right, and the two guide rails cooperate with the guide sliding block at the bottom of the mobile platform to slide and guide. The mobile platform is provided with mounting side plates on both sides, and the front outer side of the mounting side plates is fixed with a limiting guide block that cooperates with the L-shaped guide groove to limit and guide the sliding.

[0018] Preferably, two L-shaped push blocks are fixed on the left and right sides of the front of the lifting platform. During the downward movement of the lifting platform, the push blocks push the L-shaped plate to swing. Under the action of the limiting guide block on the mounting side plate and the L-shaped guide groove, the swing of the L-shaped plate will pull the moving platform to move along the guide rail.

[0019] Preferably, the L-shaped plate is rotatably engaged with the connecting rod fixed on the U-shaped support on the base plate, and the L-shaped plate is always located below the pushing block during the swinging process, and is limited by the pushing block to prevent the L-shaped plate from detaching from the pushing block.

[0020] Preferably, the riveting die is fixed at the bottom of the moving platform. When the riveting die moves to the riveting station, the hydraulic cylinder pushes the riveting head to rivet the workpiece inside the riveting die.

[0021] Compared with the prior art, the technical effects and advantages of this utility model are:

[0022] 1. This semi-automatic riveting machine features an angle-adjustable worktable. The worktable, utilizing a combination of rotary and lifting cylinders, automatically picks up and transfers workpieces from the feeding station to the riveting die, reducing manual intervention, improving the automation level of feeding, and lowering labor costs. The guide plate at the rear of the swing plate, in conjunction with the lifting cylinder housing, provides sliding guidance, preventing the swing plate from shifting or wobbling during lifting and ensuring the lifting accuracy of the vacuum suction cup.

[0023] 2. The linkage riveting mechanism uses a hydraulic cylinder to drive the riveting head. When the lifting platform moves downward, the push block pushes the L-shaped plate to swing. The swinging L-shaped plate pulls the moving platform along the guide rail. This design cleverly links the up-and-down movement of the riveting head with the station switching movement of the riveting die. This reduces the need for additional power sources and control mechanisms, simplifies the equipment structure, and lowers manufacturing costs and maintenance difficulty. This linkage method ensures that the riveting action of the riveting head and the station switching action of the riveting die are synchronized, improving the coordination and continuity of the production process. It enables processes such as material loading, station switching, and riveting to be completed continuously and efficiently, further improving production efficiency.

[0024] 3. The L-shaped plate and the connecting rod on the U-shaped support on the base plate rotate together, allowing the L-shaped plate to swing smoothly; at the same time, the limiting effect of the push block on the L-shaped plate can prevent the L-shaped plate from disengaging from the push block, ensuring the stability and reliability of the linkage mechanism and ensuring that the equipment can operate stably for a long time.

[0025] 4. This semi-automatic riveting machine automates and links multiple actions such as workpiece loading, station switching, and riveting. It has the advantages of high flexibility, high precision, good stability, and high production efficiency, thereby improving product quality and production efficiency. Attached Figure Description

[0026] Figure 1 This is a first-view diagram of the present invention;

[0027] Figure 2 This is a second-view diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the riveting die of the linkage riveting mechanism of this utility model in the feeding station;

[0029] Figure 4 This is a schematic diagram of the linkage riveting mechanism of this utility model in the riveting station;

[0030] Figure 5 This is a schematic diagram of the angle adjustment worktable of this utility model.

[0031] In the diagram: 100. Angle adjustment worktable; 11. Vacuum suction cup; 12. Rotary cylinder; 13. Lifting cylinder; 14. Rotating platform; 15. Swing plate; 16. Guide plate;

[0032] 200. Linkage riveting mechanism; 21. Riveting die; 22. Riveting head; 23. Hydraulic cylinder; 24. Lifting platform; 25. L-shaped plate; 26. Push block; 27. L-shaped guide groove; 28. Guide rail; 29. ​​Moving platform; 210. Base plate; 211. Bracket; 212. T-shaped mounting plate; 213. Guide sleeve; 214. Guide rod; 215. Guide sliding block; 216. Mounting side plate; 217. Limiting guide block; 218. U-shaped support; 219. Connecting rod. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] The following combination Figures 1 to 5 This application will be described in further detail.

[0035] This application discloses a semi-automatic riveting machine with an angle-adjustable worktable, including an angle-adjustable worktable 100 and a linkage riveting mechanism 200. The angle-adjustable worktable 100 is used to adsorb and transfer the workpiece on the feeding station to the riveting die 21 at the loading station; the linkage riveting mechanism 200 is used to rivet the workpiece on the riveting die 21 and to transfer the riveting die 21 at the loading station to the riveting station.

[0036] The angle-adjustable worktable 100 includes a rotary cylinder 12 for rotating the vacuum suction cup 11 and a lifting cylinder 13 for raising and lowering it. The lifting cylinder 13 is fixed on the rotating platform 14 of the rotary cylinder 12. A swing plate 15 is provided at the top of the piston rod of the lifting cylinder 13, and the vacuum suction cup 11 is installed at the bottom of the front end of the swing plate 15. Through the cooperation of the rotary cylinder 12 and the lifting cylinder 13, the swing plate 15 is driven to swing and rise and fall, so that the vacuum suction cup 11 can lower and adsorb the workpiece located at the feeding station, and can transfer and lower the workpiece onto the riveting mold 21. A guide plate 16 is provided on one side of the rear end of the swing plate 15 to slide and guide the lifting of the housing of the lifting cylinder 13.

[0037] The rotary cylinder 12 can drive the vacuum suction cup 11 to rotate, and the lifting cylinder 13 can lift it up and down. The two work together to allow the vacuum suction cup 11 to move flexibly between the feeding station and the loading station, so as to conveniently pick up the workpiece from the feeding station and transfer it to the riveting mold 21 at the loading station, thereby improving the automation and accuracy of workpiece loading.

[0038] The guide lifting mechanism can prevent the swing plate 15 from shifting or shaking during the lifting process, ensuring the lifting accuracy of the vacuum suction cup 11, thereby ensuring the accurate adsorption and placement of the workpiece.

[0039] The linkage riveting mechanism 200 includes a riveting head 22 pushed by a hydraulic cylinder 23, a lifting platform 24 for mounting the riveting head 22, a push block 26 fixed on the lifting platform 24 and pushing the L-shaped plate 25 to swing, and a moving platform 29 that slides along the L-shaped guide groove 27 on the L-shaped plate 25 and slides in coordination with the guide rail 28; it also includes a base plate 210, a bracket 211 fixed on the base plate 210, a T-shaped mounting plate 212 on the front side of the bracket 211, and the hydraulic cylinder 23 is mounted and fixed on the T-shaped mounting plate 212. The base plate 210 and the rotary cylinder 12 are both mounted on the body platform of the riveting machine.

[0040] The lifting platform 24 has symmetrically arranged guide sleeves 213 on both sides, which cooperate with the guide rods 214 fixedly installed on the top of the base plate 210 for guiding and sliding. Two guide rails 28 are symmetrically arranged on the left and right, and the two guide rails 28 cooperate with the guide sliding blocks 215 at the bottom of the moving platform 29 for sliding guidance. The moving platform 29 has mounting side plates 216 on both sides, and the front outer side of the mounting side plates 216 is fixedly provided with limiting guide blocks 217 that cooperate with the L-shaped guide grooves 27 for limiting and guiding sliding.

[0041] Two L-shaped push blocks 26 are fixedly installed on the left and right sides of the front of the lifting platform 24. During the downward movement of the lifting platform 24, the push blocks 26 push the L-shaped plate 25 to swing. Under the action of the limiting guide block 217 on the mounting side plate 216 cooperating with the L-shaped guide groove 27 to limit and guide the sliding, the swing of the L-shaped plate 25 will pull the moving platform 29 to move along the guide rail 28. The L-shaped plate 25 is rotatably engaged with the connecting rod 219 fixedly installed on the U-shaped support 218 on the base plate 210, and the L-shaped plate 25 is always below the push block 26 during the swing, and is limited by the push block 26 to prevent the L-shaped plate 25 from disengaging from the push block 26.

[0042] The riveting die 21 is fixed at the bottom of the moving platform 29. When the riveting die 21 moves to the riveting station, the hydraulic cylinder 23 pushes the riveting head 22 to rivet the workpiece inside the riveting die 21.

[0043] The hydraulic cylinder 23 can generate a large thrust, enabling the riveting head 22 to obtain sufficient force to rivet the workpiece, ensuring riveting quality. It is suitable for riveting various workpieces that require large riveting force. The pressure of the hydraulic system is relatively stable, which can ensure the smoothness of the riveting process, reduce the impact force during riveting, and improve the consistency and reliability of riveting.

[0044] The guide sleeves 213 on both sides of the lifting platform 24 cooperate with the guide rods 214 on the top of the base plate 210 to guide and slide, which can limit the movement trajectory of the lifting platform 24, so that it remains stable and accurate during the up and down movement, avoiding shaking or deviation, thereby ensuring the riveting accuracy of the riveting head 22.

[0045] The two guide rails 28 cooperate with the guide sliding block 215 at the bottom of the moving platform 29 to slide and guide, enabling the moving platform 29 to move accurately along the predetermined trajectory, ensuring the switching accuracy of the riveting die 21 between different workstations, and improving production efficiency and product quality.

[0046] When the lifting platform 24 moves downward, the push block 26 pushes the L-shaped plate 25 to swing. The swinging L-shaped plate 25 pulls the moving platform 29 along the guide rail 28, cleverly linking the up-and-down movement of the riveting head 22 with the station switching movement of the riveting die 21. This reduces the need for additional power sources and control mechanisms, simplifies the equipment structure, and lowers costs. This linkage method ensures that the riveting action of the riveting head 22 and the station switching action of the riveting die 21 are synchronized, improving the coordination and continuity of the production process.

[0047] The L-shaped plate 25 rotates with the connecting rod 219 on the U-shaped support 218 on the base plate 210, allowing the L-shaped plate 25 to swing smoothly. At the same time, the limiting effect of the push block 26 on the L-shaped plate 25 can prevent the L-shaped plate 25 from disengaging from the push block 26, thus ensuring the stability and reliability of the linkage mechanism.

[0048] As the hydraulic cylinder 23 pushes the lifting platform 24 up and down, the riveting head 22 also moves up and down, and the push block 26 pushes the L-shaped plate 25 to swing, thereby driving the moving platform 29 to move, so that the riveting die 21 on the moving platform 29 switches back and forth between the loading station and the riveting station.

[0049] When the riveting die 21 moves to the riveting station, the hydraulic cylinder 23 pushes the riveting head 22 to rivet the workpiece inside the riveting die 21, ensuring the accuracy of the riveting position and improving the riveting quality. During the up-and-down movement of the lifting platform 24 by the hydraulic cylinder 23, the riveting head 22 can move up and down to complete the riveting action, while the moving platform 29 can switch the riveting die 21 back and forth between different stations, enabling continuous operation of processes such as feeding and riveting, greatly improving production efficiency.

[0050] The following is a detailed workflow of a semi-automatic riveting machine with an angle-adjustable worktable:

[0051] Preparation phase:

[0052] Place the workpiece to be riveted at the feeding station, while ensuring that all parts of the equipment are in their initial state, such as the lifting platform 24 being in the high position, the riveting die 21 on the moving platform 29 being in the loading station, and the vacuum suction cup 11 of the angle adjustment worktable 100 awaiting work instructions. Check whether the pressure of the hydraulic system and pneumatic system is normal, and whether the lubrication of each moving part is good.

[0053] Workpiece loading stage:

[0054] When the rotary cylinder 12 is started, it drives the lifting cylinder 13 on its rotating platform 14 to rotate, so that the vacuum suction cup 11 installed at the bottom of the front end of the swing plate 15 at the top of the piston rod of the lifting cylinder 13 is aligned with the workpiece at the feeding station.

[0055] The piston rod of the lifting cylinder 13 lowers, causing the swing plate 15 to descend. The guide plate 16 on one side of the rear end of the swing plate 15 slides along the housing of the lifting cylinder 13 to ensure a smooth descent, allowing the vacuum suction cup 11 to contact and adhere to the workpiece. The piston rod of the lifting cylinder 13 extends, lifting the vacuum suction cup 11 with the workpiece attached. The rotary cylinder 12 actuates again, rotating the vacuum suction cup 11 above the riveting mold 21 at the loading station. The piston rod of the lifting cylinder 13 lowers again, placing the workpiece onto the riveting mold 21, and then the vacuum suction cup 11 releases the workpiece. The rotary cylinder 12 and the lifting cylinder 13 of the angle adjustment worktable 100 reset, returning the vacuum suction cup 11 to its initial position, ready for the next loading operation.

[0056] Preparation of the linkage riveting mechanism 200:

[0057] At this time, the lifting platform 24 in the linkage riveting mechanism 200 is in a high position, the riveting head 22 is above, the L-shaped plate 25 is in the initial position, and the riveting mold 21 on the moving platform 29 is in the loading station waiting to receive the workpiece.

[0058] Hydraulic cylinder 23 starts working, pushing the lifting platform 24 downward. The guide sleeves 213 on both sides of the lifting platform 24 slide along the guide rods 214 on the top of the base plate 210, ensuring the smooth descent of the lifting platform 24. As the lifting platform 24 moves downward, the L-shaped push blocks 26 fixed on its front left and right sides push the L-shaped plate 25 to swing. The L-shaped plate 25 rotates with the connecting rod 219 on the U-shaped support 218 on the base plate 210, and remains below the push blocks 26 during the swing, with the push blocks 26 limiting it to prevent it from disengaging. Under the limiting and guiding action of the limiting guide block 217 on the mounting side plate 216 and the L-shaped guide groove 27 on the L-shaped plate 25, the L-shaped plate 25 swings and pulls the moving platform 29 along the two guide rails 28 symmetrically arranged on the left and right. The guide rails 28 slide and guide the sliding block 215 at the bottom of the moving platform 29, ensuring that the moving platform 29 moves accurately from the loading station of the riveting mold 21 to the riveting station.

[0059] When the mobile platform 29 moves the riveting die 21 to the riveting station, the hydraulic cylinder 23 pushes the riveting head 22 down to perform the riveting operation on the workpiece inside the riveting die 21. The hydraulic system provides stable pressure to ensure the riveting quality.

[0060] Hydraulic cylinder 23 reverses its movement, pushing lifting platform 24 upward. During the upward movement of lifting platform 24, push block 26 rises along with it, no longer applying thrust to L-shaped plate 25. Due to the linkage between L-shaped plate 25 and moving platform 29, as lifting platform 24 rises, L-shaped plate 25 swings in the opposite direction, pulling moving platform 29 to move in the opposite direction along guide rail 28, causing riveting die 21 to return from riveting station to loading station.

[0061] Cycle phase:

[0062] Repeat the above steps of workpiece loading, station switching, riveting, and resetting to achieve continuous semi-automatic riveting production.

[0063] In summary, this semi-automatic riveting machine, through the design of the angle-adjustable worktable 100 and the linkage riveting mechanism 200, realizes the automation and linkage of multiple actions such as workpiece loading, station switching and riveting. It has the advantages of high flexibility, high precision, good stability and high production efficiency, and can meet different production needs, improve product quality and production efficiency.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A semi-automatic riveting press with an angularly adjustable worktable, characterized in that, include: An angle-adjustable worktable (100) is used to adsorb and transfer the workpiece on the feeding station to the riveting mold (21) at the loading station; the angle-adjustable worktable (100) includes a rotary cylinder (12) for driving the vacuum suction cup (11) to rotate and a lifting cylinder (13) for lifting. The linkage riveting mechanism (200) is used to rivet the workpiece on the riveting die (21) and to transfer the riveting die (21) of the loading station to the riveting station; The linkage riveting mechanism (200) includes a riveting head (22) pushed by a hydraulic cylinder (23), a lifting platform (24) for mounting the riveting head (22), a push block (26) fixed on the lifting platform (24) and pushing the L-shaped plate (25) to swing, and a moving platform (29) that slides along the L-shaped guide groove (27) on the L-shaped plate (25) and slides in conjunction with the guide rail (28); As the hydraulic cylinder (23) pushes the lifting platform (24) to move up and down, the riveting head (22) also moves up and down, and the push block (26) pushes the L-shaped plate (25) to swing, thereby driving the moving platform (29) to move, so that the riveting die (21) on the moving platform (29) switches back and forth between the loading station and the riveting station.

2. A semi-automatic riveter with an angularly adjustable worktable according to claim 1, characterized in that: The lifting cylinder (13) is fixed on the rotating platform (14) of the rotary cylinder (12). The top of the piston rod of the lifting cylinder (13) is provided with a swing plate (15), and the vacuum suction cup (11) is installed at the bottom of the front end of the swing plate (15). By cooperating with the rotary cylinder (12) and the lifting cylinder (13), the swing plate (15) is driven to swing and rise, so that the vacuum suction cup (11) can lower and adsorb the workpiece located on the feeding station, and can transfer and lower the workpiece onto the riveting mold (21).

3. A semi-automatic riveter with an angularly adjustable worktable according to claim 2, characterized in that: A guide plate (16) is provided on one side of the rear end of the swing plate (15) to guide the sliding lifting of the housing in conjunction with the lifting cylinder (13).

4. A semi-automatic riveter with an angularly adjustable worktable according to claim 1, characterized in that: The linkage riveting mechanism (200) also includes a base plate (210) and a bracket (211) fixed on the base plate (210). The front side of the bracket (211) is provided with a T-shaped mounting plate (212). The hydraulic cylinder (23) is installed and fixed on the T-shaped mounting plate (212). The base plate (210) and the rotary cylinder (12) are both installed on the machine platform of the riveting machine.

5. A semi-automatic riveter with an angularly adjustable worktable according to claim 4, characterized in that: The lifting platform (24) is provided with symmetrically arranged guide sleeves (213) on both sides. The guide sleeves (213) cooperate with the guide rods (214) fixedly arranged on the top of the base plate (210) to guide and slide.

6. A semi-automatic riveter with an angularly adjustable worktable according to claim 1, characterized in that: Two guide rails (28) are provided symmetrically on the left and right, and the two guide rails (28) cooperate with the guide sliding block (215) at the bottom of the moving platform (29) for sliding guidance. The moving platform (29) is provided with mounting side plates (216) on both sides. The front side of the mounting side plate (216) is fixed with a limiting guide block (217) that cooperates with the L-shaped guide groove (27) for limiting and guiding sliding.

7. A semi-automatic riveter with an angularly adjustable worktable according to claim 6, characterized in that: Two L-shaped push blocks (26) are fixed on the left and right sides of the front side of the lifting platform (24). During the downward movement of the lifting platform (24), the push blocks (26) push the L-shaped plate (25) to swing. Under the action of the limiting guide block (217) on the mounting side plate (216) and the L-shaped guide groove (27) in cooperation, the swing of the L-shaped plate (25) will pull the moving platform (29) to move along the guide rail (28).

8. A semi-automatic riveter with an angularly adjustable worktable according to claim 7, characterized in that: The L-shaped plate (25) is rotatably engaged with the connecting rod (219) fixed on the U-shaped support (218) on the base plate (210), and the L-shaped plate (25) is always located below the push block (26) during the swinging process, and is limited by the push block (26) to prevent the L-shaped plate (25) from disengaging from the push block (26).

9. A semi-automatic riveter with an angularly adjustable worktable according to claim 8, characterized in that: The riveting die (21) is fixed at the bottom of the moving platform (29). When the riveting die (21) moves to the riveting station, the hydraulic cylinder (23) pushes the riveting head (22) to rivet the workpiece inside the riveting die (21).

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