A hot riveting device for producing a vehicle lamp cover

Abstract

The application relates to a hot riveting device for vehicle lamp cover production, and belongs to the technical field of vehicle lamp cover production and processing. The device comprises a supporting frame, a lifting mechanism, a hot riveting assembly, a hot riveting supporting assembly and a workpiece limiting assembly. The lifting mechanism drives the lifting of a moving seat through a lifting cylinder. The hot riveting assembly comprises a heater and a hot riveting head. The hot riveting supporting assembly comprises a base and a workpiece supporting block for bearing a workpiece. The workpiece limiting assembly comprises a supporting rod and a limiting plate for limiting a workpiece. The device is further provided with a buffer assembly for buffering the movement of the hot riveting head, a limiting supporting column and a limiting seat for controlling the hot riveting depth, a marking assembly for marking a workpiece and a material taking assembly for automatically moving out a workpiece. The device can prevent the movement of a workpiece along with a hot riveting head, and improve the production efficiency and product quality.

Description

Technical Field

[0001] This application relates to the technical field of automotive lamp cover manufacturing and processing, and in particular to a hot riveting device for automotive lamp cover manufacturing. Background Technology

[0002] In the automotive headlight housing manufacturing industry, hot riveting equipment is a commonly used tool for joining or shaping headlight housings through thermal processing. A typical hot riveting process involves moving the hot riveting head toward the headlight housing, inserting the hot riveting head into the headlight housing material and forming a process hole under high temperature, and then pulling the hot riveting head out of the headlight housing.

[0003] However, in practice, when the hot riveting head is pulled out, the high-temperature adhesion between the surface of the hot riveting head and the molten lampshade material often causes the head to move along with the lampshade. This phenomenon of the lampshade moving along with the head means that the processed lampshade needs to be removed from the hot riveting head in an additional step, thus prolonging the entire hot riveting process. The extended processing time not only reduces production efficiency but may also affect the quality of hot riveting due to the unstable movement of the lampshade, such as causing irregular shapes of the process holes or damage to the lampshade surface, thereby affecting the overall performance and appearance of the vehicle headlight. Utility Model Content

[0004] To address the problem of workpiece movement caused by high-temperature adhesion during hot riveting head removal, which prolongs processing time and affects the stability of process hole quality, this application provides a hot riveting device for automotive lamp cover production.

[0005] The hot riveting equipment for producing automotive headlight covers provided in this application adopts the following technical solution: A hot riveting device for producing automotive headlight covers includes a support frame, a lifting mechanism, a hot riveting assembly, a hot riveting support assembly, and a workpiece limiting assembly. The lifting mechanism includes a lifting cylinder and a movable seat. The lifting cylinder is mounted on the support frame, and the movable seat is located at the end of the piston rod of the lifting cylinder. The hot riveting assembly includes a heater mounted on the movable seat, and a hot riveting head is provided on the heater. The hot riveting support assembly includes a base and a workpiece support block. The base is fixedly connected to the support frame and is located below the heater. The workpiece support block is mounted on the base and is used to support the workpiece. The workpiece limiting assembly includes a support rod and a limiting plate. The support rod is slidably mounted on the base, and the limiting plate is mounted on the support rod and is used to limit the workpiece.

[0006] By adopting the above technical solutions, the support frame provides a stable structural foundation for the hot riveting equipment, ensuring overall rigidity. The lifting mechanism drives the moving seat to move vertically through a lifting cylinder, achieving precise lifting and positioning of the hot riveting assembly. The hot riveting assembly uses a heater to heat the hot riveting head, forming regular process holes on the workpiece through hot processing. The hot riveting support assembly reliably supports the workpiece through the base and workpiece support block, preventing displacement during processing. The workpiece limiting assembly constrains the workpiece position through support rods and limiting plates, effectively preventing the workpiece from moving with the return stroke of the hot riveting head.

[0007] Preferably, the lifting mechanism further includes a connecting frame and a buffer assembly, the buffer assembly including a buffer member; the connecting frame is disposed on the piston rod of the lifting cylinder, a second support plate is slidably disposed on the support frame, the second support plate being located below the connecting frame; the movable seat is disposed on the lower bottom wall of the second support plate; the buffer member is disposed between the connecting frame and the second support plate.

[0008] By adopting the above technical solution, the buffer assembly provides elastic buffering between the connecting frame and the second support plate through the buffer component, absorbing the impact energy when the hot riveting head descends, ensuring that the hot riveting head makes smooth contact with the workpiece surface, and reducing damage to the workpiece surface.

[0009] Preferably, a limiting support column is vertically provided at the lower end of the movable seat, and a limiting seat is provided on the base, with the limiting seat located directly below the limiting support column.

[0010] By adopting the above technical solution, the limiting support column and the limiting seat form a mechanical stop through plugging, which precisely controls the termination position of the hot riveting head descent and ensures the consistency of the process hole depth.

[0011] Preferably, the lower end of the limiting support column is threaded with an adjusting support rod.

[0012] By adopting the above technical solution, the adjusting support rod is connected to the limiting support column by a thread, realizing the fine adjustment function of the depth of the hot riveting head into the workpiece, and adapting to the processing needs of workpieces of different thicknesses.

[0013] Preferably, the support rod is also provided with a hand gripper.

[0014] By adopting the above technical solution, the hand gripper provides a gripping point for manually operating the support rod, which facilitates quick adjustment of the position of the limiting plate to fix or release the workpiece.

[0015] Preferably, the workpiece limiting assembly further includes a push cylinder, which is disposed on the base, and the end of the piston rod of the push cylinder is disposed on the support rod.

[0016] By adopting the above technical solution, the cylinder drives the support rod to move linearly, thereby achieving the clamping and loosening of the workpiece limiting plate and improving the limiting efficiency.

[0017] Preferably, the base is further provided with a marking assembly, which includes a marking bracket and a marking cylinder. The marking bracket is vertically arranged on the base, and the marking cylinder is arranged on the marking bracket. The piston rod of the marking cylinder is provided with a conical head at its end. The marking assembly is used to mark the workpiece after hot riveting.

[0018] By adopting the above technical solution, the marking component drives the cone head through the marking cylinder to form a mark on the surface of the workpiece that has been hot riveted, which makes it easy to distinguish the processing status.

[0019] Preferably, the support frame is further provided with a material handling assembly, which includes a lifting support cylinder, a telescopic cylinder, and a suction cylinder. The lifting support cylinder is vertically arranged on the support frame, the telescopic cylinder is arranged on the piston rod of the lifting support cylinder, the suction cylinder is arranged on the piston rod of the telescopic cylinder, and a suction cup is provided on the piston rod of the suction cylinder.

[0020] By adopting the above technical solution, the material handling component adjusts the height of the lifting support cylinder, adjusts the horizontal position of the telescopic cylinder, and uses the suction cylinder in conjunction with the suction cup for negative pressure adsorption, thereby realizing the automatic removal of the processed workpiece.

[0021] In summary, this application includes the following beneficial technical effects: The workpiece limiting assembly, with its limiting plate and support rod working together, firmly restrains the workpiece during the return stroke of the hot riveting head, preventing it from sticking or moving and eliminating the need for manual removal. The buffer assembly's cushioning component slows the downward speed of the hot riveting head, preventing impact on the workpiece and ensuring the regularity of the process hole shape. The material handling assembly's suction cup automatically picks up the finished workpiece, enabling continuous operation. These components work together to shorten the hot riveting cycle, improve production efficiency, and enhance the uniformity of the automotive headlight cover's appearance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure used to illustrate Embodiment 1 of this application.

[0023] Figure 2 This is a schematic diagram illustrating the structure of the hot riveting assembly in Embodiment 1 of this application.

[0024] Figure 3 This is a structural schematic diagram of Embodiment 1 of this application, which illustrates the hot riveting support assembly, the workpiece limiting assembly, and the marking assembly.

[0025] Figure 4 This is a schematic diagram of the overall structure used in Embodiment 2 of this application.

[0026] Figure 5This is a schematic diagram illustrating the structure of the workpiece limiting component and the material picking component in Embodiment 2 of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Support frame; 11. First support plate; 12. Support column; 13. Second support plate; 2. Lifting mechanism; 21. Lifting cylinder; 22. Connecting frame; 23. Buffer assembly; 231. Positioning rod; 2311. Positioning block; 232. Buffer component; 24. Moving seat; 241. Limiting support column; 242. Adjusting support rod; 3. Hot riveting assembly; 31. Heater; 311. Hot riveting head; 4. Hot riveting support assembly ; 41. Base; 411. Workpiece support block; 42. Limiting seat; 421. Connector; 5. Workpiece limiting assembly; 51. Support rod; 511. Hand gripper; 52. Limiting connecting plate; 53. Limiting plate; 54. Push cylinder; 541. Push rod; 6. Marking assembly; 61. Marking bracket; 62. Marking cylinder; 7. Material handling assembly; 71. Lifting support cylinder; 72. Telescopic cylinder; 73. Suction cylinder; 731. Suction cup. Detailed Implementation

[0028] The present application will be further described in detail below with reference to Appendices 1-5. An embodiment of this application discloses a hot riveting device for the production of automotive headlight covers.

[0029] Example 1 A hot riveting device for producing automotive headlight covers. (Ref.) Figures 1-2 The system includes a support frame 1, a lifting mechanism 2, a hot riveting support assembly 4, and a workpiece limiting assembly 5. The lifting mechanism 2 and the hot riveting support assembly 4 are both mounted on the support frame 1. The hot riveting assembly 3 is mounted on the lifting mechanism 2, and the workpiece limiting assembly 5 is mounted on the hot riveting support assembly 4. A marking assembly 6 is also mounted on the hot riveting support assembly 4. The lifting mechanism 2 drives the hot riveting assembly 3 to move up and down. The hot riveting assembly 3 is used to perform hot riveting on the workpiece, and the hot riveting support assembly 4 supports the workpiece. The workpiece limiting assembly 5 limits the workpiece, preventing it from moving with the hot riveting assembly 3. The marking assembly 6 marks the workpiece after the hot riveting process has been completed.

[0030] Reference Figures 1-2wherein a support column 12 is vertically and fixedly connected to the support frame 1. In this embodiment, four support columns 12 are provided, the four support columns 12 are arranged in a rectangular shape, and the upper ends of the four support columns 12 jointly support a first support plate 11. The lifting mechanism 2 includes a lifting cylinder 21, a connecting frame 22, a buffer assembly 23 and a moving base 24. The lifting cylinder 21 is vertically and fixedly connected to the top wall of the first support plate 11, and the piston rod of the lifting cylinder 21 extends out from the bottom wall of the first support plate 11. The connecting frame 22 is fixedly connected to the end of the piston rod of the lifting cylinder 21, and the connecting frame 22 is further slidably connected to the four support columns 12. A second support plate 13 is further mounted on the support frame 1, the second support plate 13 is slidably connected to the four support columns 12, and the second support plate 13 is located below the connecting frame 22. The buffer assembly 23 includes a positioning rod 231 and a buffer member 232. In this embodiment, four sets of buffer assemblies 23 are provided, all of which connect the connecting frame 22 and the second support plate 13, and the four sets of buffer assemblies 23 are arranged in a rectangular shape. This embodiment takes one set of the buffer assemblies 23 as an example for description: the positioning rod 231 is vertically arranged, the positioning rod 231 is vertically and fixedly connected to the top wall of the second support plate 13, the upper end of the positioning rod 231 is slidably connected to the connecting frame 22, the upper end of the positioning rod 231 is further fixedly connected with a positioning block 2311, and the positioning block 2311 is located at the upper end of the connecting frame 22. A buffer member 232 is sleeved on the positioning rod 231, the buffer member 232 is a buffer spring, the upper end of the buffer spring abuts against the lower end of the connecting frame 22, and the lower end of the buffer spring abuts against the top wall of the second support plate 13.

[0031] With reference to Figure 1 , the main function of the positioning block 2311 is to bear the gravity of the second support plate 13 and all components mounted on the second support plate 13. Through this design, the gravity of the second support plate 13 and related components is directly borne by the positioning block 2311, instead of being transmitted to the buffer spring. In this way, the elastic failure or plastic deformation of the buffer spring that may be caused by long-term static gravity bearing is avoided, ensuring that the buffer spring can always work normally within its elastic range during the hot riveting process, so as to provide a stable and reliable buffering effect.

[0032] With reference to Figure 1 , the upper end of the moving base 24 is fixedly connected to the bottom wall of the second support plate 13, the lower end of the moving base 24 is further vertically and fixedly connected with limit support columns 241. In this embodiment, four limit support columns 241 are provided and arranged in a rectangular shape, the lower end of each limit support column 241 is threadedly connected with an adjusting support rod 242, and the lower end of each adjusting support rod 242 is provided with an insertion hole.

[0033] With reference to Figures 1-2The hot riveting assembly 3 is mounted on the movable base 24. Specifically, the hot riveting assembly 3 includes a heater 31, which is fixedly connected to the lower end of the movable base 24. A hot riveting head 311 is vertically fixedly connected to the lower end of the heater 31. The heater 31 is located between the four limiting support columns 241.

[0034] Reference Figures 1-3 The hot riveting support assembly 4 includes a base 41 and a workpiece support block 411. The base 41 is fixedly connected to the support frame 1 and is located below the movable seat 24. The upper end of the base 41 is fixedly connected to the workpiece support block 411. In this embodiment, two workpiece support blocks 411 are arranged side by side, meaning that two workpieces can be hot riveted at a time. The upper end of the base 41 is also fixedly connected to a limiting seat 42. In this embodiment, four limiting seats 42 are arranged in a "U" shape, and each limiting seat 42 is located directly below an adjusting support rod 242. The upper end of each limiting seat 42 is vertically fixedly connected to a connector 421.

[0035] Reference Figures 1-3 The adjusting support rod 242 is used to adjust the height at which the hot riveting head 311 extends into the workpiece. The adjusting support rod 242 is threaded to the lower end of the limiting support column 241. By rotating the adjusting support rod 242, its axial position on the limiting support column 241 can be changed. When the lifting mechanism 2 drives the hot riveting assembly 3 to move downwards, the lower end of the adjusting support rod 242 engages with the connector 421 on the limiting seat 42 of the hot riveting support assembly 4, forming a mechanical limit and preventing the hot riveting assembly 3 from descending further. By adjusting the extension length of the adjusting support rod 242, the depth to which the hot riveting head 311 extends into the workpiece during hot riveting can be controlled, ensuring the consistency of the process hole dimensions and processing quality, and meeting the production requirements of different workpieces.

[0036] Reference Figure 3 The workpiece limiting assembly 5 includes a support rod 51, a limiting connecting plate 52, and a limiting plate 53. In this embodiment, two sets of workpiece limiting assemblies 5 are provided, each set being used to limit a workpiece on a workpiece support block 411. This embodiment uses one set of workpiece limiting assemblies 5 as an example for explanation. Specifically, the support rod 51 is slidably connected to the base 41, and the sliding direction of the support rod 51 is parallel to the length direction of the workpiece support block 411. One end of the support rod 51 is vertically fixedly connected to the limiting connecting plate 52, and the end of the limiting connecting plate 52 is horizontally fixedly connected to the limiting plate 53. The other end of the support rod 51 is vertically fixedly connected to a gripping rod 511.

[0037] Reference Figure 3Two sets of marking components 6 are provided, each set being disposed on one side of a workpiece support block 411. This embodiment uses one set of marking components 6 as an example for explanation. Specifically, the marking component 6 includes a marking bracket 61 and a marking cylinder 62. The marking bracket 61 is vertically fixedly connected to the upper end of the base 41, and the marking cylinder 62 is fixedly connected to the marking bracket 61. A conical head is fixedly connected to the end of the piston rod of the marking cylinder 62. A through hole is provided on the side wall of the workpiece support block 411 near the conical head to facilitate the insertion of the conical head into the interior.

[0038] The implementation principle of Example 1 is as follows: The operator first places the headlight cover workpiece to be processed on the workpiece support block 411. Then, the operator operates the workpiece limiting component 5, pushing the gripper 511 to drive the support rod 51 to slide on the base 41, causing the limiting plate 53 fixed to one end of the support rod 51 to move towards the workpiece and finally tightly abut against the side wall of the workpiece, thereby achieving effective limiting of the workpiece. After the preparation is complete, the lifting mechanism 2 is started. The piston rod of the lifting cylinder 21 extends downward, driving the connecting frame 22 to slide downward along the support column 12. The connecting frame 22 drives the second support plate 13 to move downward synchronously through the buffer component 23. The downward movement of the second support plate 13 causes the hot riveting component 3 installed on it to descend synchronously, and the hot riveting head 311 gradually approaches and finally contacts the workpiece surface. During this process, the buffer spring of the buffer component 23 is compressed, and its elastic force effectively buffers the downward speed of the hot riveting head 311, avoiding the hot riveting head 311 from contacting the workpiece in an impact manner, ensuring that the hot riveting head 311 can smoothly extend into the workpiece material.

[0039] Under the action of heater 31, the hot riveting head 311 maintains the high temperature required for processing. When the hot riveting head 311 contacts the workpiece and applies pressure, it extends into the lampshade material and forms a process hole through hot processing. After the hot riveting is completed, the piston rod of the lifting cylinder 21 retracts, driving the connecting frame 22, the second support plate 13, and the hot riveting assembly 3 to rise as a whole, and the hot riveting head 311 is pulled out from the process hole of the workpiece. During this process, because the workpiece is firmly restricted to the workpiece support block 411 by the limiting plate 53, even if there is an adhesive force between the hot riveting head 311 and the molten material, the workpiece can remain in place and will not rise with the hot riveting head 311.

[0040] After the hot riveting head 311 is fully reset, the marking assembly 6 begins to operate. The marking cylinder 62 actuates, pushing the cone at the end of its piston rod forward. The cone passes through the through hole in the side wall of the workpiece support block 411, leaving a mark on the surface of the machined workpiece. After completing the hot riveting and marking processes, the operator moves the gripper 511 in the opposite direction, causing the limiting plate 53 to detach from the workpiece, allowing the machined workpiece to be removed from the workpiece support block 411.

[0041] This application, by adding a workpiece limiting component 5, reliably prevents workpiece displacement during the return stroke of the hot riveting head 311, eliminating the need for manual removal of the workpiece from the hot riveting head 311. Simultaneously, the buffer component 23, through the action of a buffer spring, prevents impact from the hot riveting head 311 on the workpiece, ensuring the regularity of the process hole shape. These improvements collectively shorten the processing cycle, improve production efficiency, and contribute to enhancing the final quality and appearance consistency of the automotive headlight cover product.

[0042] Example 2 Reference Figures 4-5 The difference between this embodiment and embodiment 1 is that a hot riveting device for producing car headlight covers includes a workpiece limiting assembly 5 comprising a push cylinder 54, which is fixedly connected to a base 41. The end of the piston rod of the push cylinder 54 is fixedly connected to a push rod 541. In this embodiment, the length direction of the push rod 541 is perpendicular to the length direction of the piston rod, and both ends of the push rod 541 are fixedly connected to a support rod 51.

[0043] Reference Figures 4-5 The support frame 1 is also equipped with a material-picking assembly 7, which is used to pick up workpieces that have undergone hot riveting and have been marked. Two sets of material-picking assemblies 7 are provided, each corresponding to one of the two workpiece support blocks 411. Each set of material-picking assemblies 7 is used to pick up a workpiece from one workpiece support block 411. This embodiment uses one set of material-picking assemblies 7 as an example. The material-picking assembly 7 includes a lifting support cylinder 71, a telescopic cylinder 72, and a suction cylinder 73. The lifting support cylinder 71 is vertically fixed to the support frame 1. The telescopic cylinder 72 is fixedly connected to the end of the piston rod of the lifting support cylinder 71. In this embodiment, the telescopic cylinder 72 is a multi-stage telescopic cylinder. The piston rod of the telescopic cylinder 72 is perpendicular to the piston rod of the lifting support cylinder 71. The suction cylinder 73 is vertically fixed to the end of the piston rod of the telescopic cylinder 72, and a suction cup 731 is fixedly connected to the end of the piston rod of the suction cylinder 73. The design of the multi-stage telescopic cylinder enables it to significantly reduce the overall structural size of the cylinder in the retracted state while providing the required working stroke. This allows the material handling assembly 7 to achieve a compact layout in a limited space and avoids interference with other parts of the equipment.

[0044] The implementation principle of Example 2 is as follows: The operator places the headlight cover workpiece to be processed on the workpiece support block 411. Subsequently, the workpiece limiting assembly 5 is activated, pushing the cylinder 54 to move. Its piston rod extends or retracts, driving the push rod 541 fixedly connected to it to move. The push rod 541 transmits the motion to the support rods 51 at both ends, causing the support rods 51 to slide on the base 41. This causes the limiting plate 53 fixed to the end of the support rod 51 to move forward and tightly abut against the side wall of the workpiece, realizing automatic clamping and limiting of the workpiece. This limiting function is crucial in the hot riveting head 311 pull-out stage. When the hot riveting process is completed, when the lifting cylinder 21 drives the hot riveting head 311 to rise, the workpiece is firmly constrained by the limiting plate 53 on the workpiece support block 411, effectively overcoming the high-temperature adhesion force between the surface of the hot riveting head 311 and the molten headlight cover material, fundamentally preventing the workpiece from moving with the hot riveting head 311.

[0045] After the hot riveting and marking are completed, the material handling assembly 7 begins operation. The lifting support cylinder 71 drives the telescopic cylinder 72 and the suction cylinder 73 to descend to the appropriate position. The piston rod of the telescopic cylinder 72 extends, adjusting the suction cup 731 above the workpiece. The suction cylinder 73 actuates, creating negative pressure on the suction cup 731, reliably adsorbing the processed workpiece. Subsequently, the lifting support cylinder 71 rises, and the telescopic cylinder 72 retracts, removing the workpiece from the workpiece support block 411, achieving automated unloading. This automated material handling process further reduces manual intervention and shortens the work cycle.

[0046] This application ensures the stability of the workpiece during the hot riveting process by using a workpiece limiting component 5 driven by a cylinder 54; combined with the function of the buffer component 23, it ensures the smooth contact between the hot riveting head 311 and the workpiece, which is beneficial to the regularity of the shape of the process hole. The newly added material picking component 7 uses a suction cup 731 to pick up the workpiece, realizing the automatic removal of the processed workpiece. These improvements work together to increase production efficiency and help ensure the final quality and appearance consistency of the automotive headlight cover product.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hot riveting device for producing automotive lamp covers, characterized in that: The assembly includes a support frame (1), a lifting mechanism (2), a hot riveting assembly (3), a hot riveting support assembly (4), and a workpiece limiting assembly (5). The lifting mechanism (2) includes a lifting cylinder (21) and a moving seat (24). The lifting cylinder (21) is mounted on the support frame (1), and the moving seat (24) is located at the end of the piston rod of the lifting cylinder (21). The hot riveting assembly (3) includes a heater (31), which is mounted on the moving seat (24). The heater (31) is equipped with a hot riveting head (311). The hot riveting support assembly (4)... The assembly includes a base (41) and a workpiece support block (411). The base (41) is fixedly connected to the support frame (1). The base (41) is located below the heater (31). The workpiece support block (411) is disposed on the base (41) and is used to support the workpiece. The workpiece limiting assembly (5) includes a support rod (51) and a limiting plate (53). The support rod (51) is slidably disposed on the base (41). The limiting plate (53) is disposed on the support rod (51) and is used to limit the workpiece.

2. The hot riveting equipment for producing automotive lamp covers according to claim 1, characterized in that: The lifting mechanism (2) further includes a connecting frame (22) and a buffer assembly (23), wherein the buffer assembly (23) includes a buffer element (232); The connecting frame (22) is mounted on the piston rod of the lifting cylinder (21), and a second support plate (13) is slidably mounted on the support frame (1), with the second support plate (13) located below the connecting frame (22); the movable seat (24) is mounted on the lower bottom wall of the second support plate (13); The buffer (232) is disposed between the connecting frame (22) and the second support plate (13).

3. The hot riveting equipment for producing automotive lamp covers according to claim 2, characterized in that: The lower end of the movable seat (24) is vertically provided with a limiting support column (241), and the base (41) is provided with a limiting seat (42), which is located directly below the limiting support column (241).

4. The hot riveting equipment for producing automotive lamp covers according to claim 3, characterized in that: The lower end of the limiting support column (241) is threaded with an adjusting support rod (242).

5. A hot riveting device for producing automotive lamp covers according to claim 1, characterized in that: The support rod (51) is also equipped with a hand gripping rod (511).

6. A hot riveting device for producing automotive lamp covers according to claim 1, characterized in that: The workpiece limiting assembly (5) also includes a push cylinder (54), which is disposed on the base (41), and the end of the piston rod of the push cylinder (54) is disposed on the support rod (51).

7. A hot riveting device for producing automotive lamp covers according to claim 1, characterized in that: The base (41) is also provided with a marking assembly (6), which includes a marking bracket (61) and a marking cylinder (62). The marking bracket (61) is vertically arranged on the base (41), and the marking cylinder (62) is arranged on the marking bracket (61). The piston rod of the marking cylinder (62) is provided with a cone at its end. The marking assembly (6) is used to mark the workpiece after hot riveting.

8. A hot riveting device for producing automotive lamp covers according to claim 1, characterized in that: The support frame (1) is also provided with a material picking assembly (7). The material picking assembly (7) includes a lifting support cylinder (71), a telescopic cylinder (72), and a suction cylinder (73). The lifting support cylinder (71) is vertically arranged on the support frame (1). The telescopic cylinder (72) is arranged on the piston rod of the lifting support cylinder (71). The suction cylinder (73) is arranged on the piston rod of the telescopic cylinder (72). The piston rod of the suction cylinder (73) is provided with a suction cup (731).

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