Servo hot riveting apparatus

Abstract

This utility model discloses a servo hot riveting device, including a frame. A lower base is fixedly mounted on the worktable of the frame, and a tooling fixture is installed on the surface of the lower base. A workpiece is fixedly mounted on the surface of the tooling fixture. An upper base is mounted on the upper side of the lower base, and a platform is fixedly connected to the bottom of the upper base. Multiple sets of hot riveting mechanisms are fixedly connected to the bottom of the platform. A lifting mechanism is installed below the lower base, and the lifting mechanism includes a base mounted on the side wall of the frame. A servo motor is fixedly mounted in the middle of the base, and the output shaft of the servo motor is connected to the input shaft A of the main reducer through a coupling. In this servo hot riveting device, the servo motor, in conjunction with the main reducer, a first auxiliary reducer, a second auxiliary reducer, and two sets of lead screws, realizes the fully closed displacement control of the upper base. Furthermore, the use of the reducers can achieve the function of decelerating and increasing torque on the upper base, preventing excessive downward pressure on the upper base and damage to the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of hot riveting equipment, specifically a servo hot riveting device. Background Technology

[0002] In the manufacturing of automotive headlights, hot riveting equipment is often used to stably heat-rivet the lighting panel and LED chips. However, existing servo hot riveting equipment often makes it inconvenient for workers to easily and stably disassemble, repair, and replace the lower jig, and its functionality is limited.

[0003] To solve the above problems, after searching, Chinese Patent No. CN218020219U was found, which discloses a headlight servo hot riveting device. The device includes a worktable, and the upper end of the worktable is provided with a processing table for positioning and placing the lower jig substrate. The headlight servo hot riveting device can conveniently and stably position and assemble the worktable and the processing cavity by engaging the locking seat at the upper processing table of the worktable with the locking column on the inner side of the support side plate.

[0004] Although the above-mentioned device can be installed by screwing the upper jig base plate and the connecting rod inside the servo transmission cavity, and can stably combine the connecting plate and the hot riveting head connected to the upper jig base plate with the connecting rod, and the servo transmission cavity forms a lifting structure with the connecting rod through the servo motor, in actual use, the connecting rod is driven to lift and lower by the servo motor. This makes it impossible for the multiple sets of hot riveting heads used for hot riveting to decelerate when pressing down on the workpiece on the lower jig base plate, which can easily lead to excessive pressing and damage to the workpiece, thus reducing the yield of the workpiece. Utility Model Content

[0005] The purpose of this invention is to provide a servo-driven hot riveting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a servo hot riveting device is provided, comprising a frame, a lower base fixedly mounted on the worktable of the frame, and a tooling fixture mounted on the surface of the lower base, with a workpiece fixedly mounted on the surface of the tooling fixture. An upper base is mounted on the upper side of the lower base, and a platform is fixedly connected to the bottom of the upper base. Multiple sets of hot riveting mechanisms are fixedly connected to the bottom of the platform. A lifting mechanism is mounted below the lower base, and the lifting mechanism includes a base mounted on the side wall of the frame, with a servo motor fixedly mounted in the middle of the base. The output shaft of the servo motor is connected to the input shaft of the main reducer via a coupling. A second auxiliary reducer is mounted on one side of the main reducer, and a first auxiliary reducer is mounted on the other side of the main reducer. A control cabinet is mounted on one side of the frame.

[0007] Furthermore, the tooling fixture consists of three sets of clamping platforms, and two sets of waist holes are opened on both sides of the bottom plate of the clamping platform. At the same time, the top of the tooling fixture is arranged opposite to multiple sets of hot riveting mechanisms.

[0008] Furthermore, the hot riveting mechanism is fixedly connected to the upper base via a carrier platform, and two sets of positioning holes are provided on both sides of the upper base. Positioning rods are inserted into the two sets of positioning holes, and the positioning rods are fixedly connected to the frame inside the machine frame. A drive seat is installed on the upper base.

[0009] Furthermore, the upper platform is driven to rise and fall by a lifting mechanism, which also includes a lead screw, which is screwed into the drive seats located at both ends of the upper platform. The two sets of lead screws are respectively fixed to the output shafts of the first and second auxiliary reducers, and a drag chain is installed on the upper platform.

[0010] Furthermore, the first auxiliary reducer, the second auxiliary reducer, and the main reducer are all screwed onto the surface of the base. The main reducer has output shafts at both ends, and the main reducer is fixed to the power input shafts of the first auxiliary reducer and the second auxiliary reducer respectively through the output shafts on both sides.

[0011] Furthermore, the first auxiliary reducer, the second auxiliary reducer, and the main reducer are combined to form the lifting and buffering mechanism of the upper base. The servo motor drives the two sets of lead screws to run synchronously through the first auxiliary reducer, the second auxiliary reducer, and the main reducer.

[0012] Furthermore, the hot riveting mechanism includes an adjusting column fixedly connected to the bottom of the platform, and the adjusting column has two sets of adjusting holes inside. At the same time, adjusting studs are inserted into the two sets of adjusting holes, and the adjusting studs pass through the adjusting holes and are fixed by nuts. A hot riveting seat is fixedly connected to the root of the adjusting stud.

[0013] Furthermore, a connecting column is fixedly connected to the bottom of the hot riveting base, a cylindrical heating rod is inserted inside the hot riveting base, and a hot riveting head is fixedly provided at the bottom of the connecting column. A hot riveting space is opened inside the hot riveting head, and multiple sets of anti-slip grooves are equally spaced on the inner wall of the hot riveting space.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This solution uses the downward movement of the upper base to drive the bottom platform and multiple sets of hot riveting mechanisms downward. Simultaneously, the hot riveting mechanisms, operating at high temperatures, melt and press down the hot riveting posts of the parts, riveting the two products together. This completes the hot riveting work of the workpiece, allowing multiple points on the workpiece to be hot-riveted at once. The equipment can complete the hot riveting of up to 32 points in a single operation, significantly improving work efficiency and reducing workpiece processing time. All riveting points on the workpiece are hot-riveted synchronously, eliminating the problem of uneven force distribution caused by separate hot riveting.

[0016] 2. This solution uses a servo motor to drive two sets of lead screws synchronously through a first auxiliary reducer, a second auxiliary reducer, and a main reducer. The servo motor, in conjunction with the main reducer, the first auxiliary reducer, the second auxiliary reducer, and the two sets of lead screws, achieves fully closed displacement control of the upper base. At the same time, the use of the reducer can reduce the speed and increase the torque of the upper base, avoiding excessive pressure on the upper base and damage to the workpiece, thereby improving the workpiece yield and service life.

[0017] 3. This solution uses tooling fixtures to be installed by bolting them through the waist holes, which facilitates the disassembly and replacement of tooling fixtures with fixtures suitable for different workpieces. The position of the tooling fixtures can also be finely adjusted through the waist holes. Different tooling fixtures can be replaced according to different application scenarios to meet diverse product needs, achieve multi-purpose use, and be convenient and fast. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the hot riveting device of this utility model;

[0019] Figure 2 This is a schematic diagram of the lifting mechanism and its installation structure of the present utility model;

[0020] Figure 3 This is a top view of the base of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the lower base structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the multi-group hot riveting mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the hot riveting mechanism of this utility model.

[0024] Figure 7 This is a cross-sectional view of the hot riveting head structure of this utility model.

[0025] The following are the labeling elements in the diagram: 1. Frame; 2. Lifting mechanism; 20. Lead screw; 21. Servo motor; 22. Main reducer; 23. First auxiliary reducer; 24. Second auxiliary reducer; 25. Base; 3. Control cabinet; 4. Cable chain; 5. Upper platform; 51. Platform; 6. Hot riveting mechanism; 61. Adjusting column; 62. Adjusting hole; 63. Adjusting stud; 64. Hot riveting seat; 65. Connecting column; 66. Hot riveting head; 661. Hot riveting space; 662. Anti-slip groove; 7. Lower platform; 71. Tooling fixture; 8. Workpiece; 9. Positioning rod. Detailed Implementation

[0026] Please see Figure 1-7This utility model provides a servo hot riveting device, including a frame 1. A lower base 7 is fixedly installed on the workbench of the frame 1, and a tooling fixture 71 is installed on the surface of the lower base 7. A workpiece 8 is fixedly installed on the surface of the tooling fixture 71. An upper base 5 is installed on the upper side of the lower base 7, and a platform 51 is fixedly connected to the bottom of the upper base 5. Multiple sets of hot riveting mechanisms 6 are fixedly connected to the bottom of the platform 51. A lifting mechanism 2 is installed below the lower base 7. The lifting mechanism 2 includes a base 25 installed on the side wall of the frame 1. A servo motor 21 is fixedly installed in the middle of the base 25. The output shaft of the servo motor 21 is fixed to the power input shaft of the main reducer 22 through a coupling. A second auxiliary reducer 24 is installed on one side of the main reducer 22, and a first auxiliary reducer 23 is installed on the other side of the main reducer 22. A control cabinet 3 is installed on one side of the frame 1.

[0027] As a preferred embodiment, the tooling fixture 71 consists of three sets of clamping platforms, and two sets of waist holes are provided on both sides of the bottom plate of the clamping platform. At the same time, the top of the tooling fixture 71 is arranged opposite to multiple sets of hot riveting mechanisms 6.

[0028] like Figure 4 As shown: The tooling fixture 71 is installed by bolts passing through the waist hole for screw connection, which facilitates the disassembly and replacement of the tooling fixture 71 with fixtures suitable for different workpieces 8. The position of the tooling fixture 71 can also be finely adjusted through the waist hole. Different tooling fixtures 71 can be replaced according to different application scenarios to meet diverse product needs, realize one machine for multiple uses, and be convenient and fast.

[0029] The hot riveting mechanism 6 is fixedly connected to the upper base 5 via the carrier 51. Two sets of positioning holes are provided on both sides of the upper base 5. Positioning rods 9 are inserted into the two sets of positioning holes and are fixedly connected to the frame inside the machine frame 1. A drive seat is installed on the upper base 5.

[0030] The upper platform 5 is driven to lift by the lifting mechanism 2. The lifting mechanism 2 also includes a lead screw 20, which is screwed into the drive seats located at both ends of the upper platform 5. The two sets of lead screws 20 are respectively fixed to the output shafts of the first reducer 23 and the second reducer 24. A drag chain 4 is installed on the upper platform 5.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown: The workpiece 8 to be riveted is stably clamped and fixed on the lower base 7 by the tooling fixture 71, which can effectively avoid displacement and shaking of the workpiece 8 during the hot riveting process, ensure accurate riveting position, and greatly reduce riveting failure or product defects caused by the positioning deviation of the workpiece 8, providing a solid foundation for high-quality riveting. The servo motor 21, together with the main reducer 22, the first auxiliary reducer 23, and the second auxiliary reducer 24, drives the two sets of lead screws 20 to move synchronously, thereby controlling the lifting and lowering of the upper base 5. This transmission structure can achieve accurate control of the movement of the upper base 5, its bottom platform 51, and multiple sets of hot riveting mechanisms 6. Both the lifting speed and the downward pressure distance can be accurately adjusted. The parameters can be flexibly adjusted according to the hot riveting requirements of different workpieces 8, with strong adaptability. At the same time, the synchronous motion design also ensures that the multiple sets of hot riveting mechanisms 6 are subjected to uniform force and move in a consistent manner, further improving the riveting accuracy. The temperature controller controls the temperature of the hot riveting mechanism 6, which can This device ensures that the hot riveting mechanism 6 is always within the optimal temperature range for melting the hot riveting post of the part. This avoids problems such as insufficient melting of the hot riveting post and insufficient riveting strength due to excessively low temperature, and also prevents excessive melting of the hot riveting post, damage to the workpiece 8, or the generation of excess impurities that affect product quality due to excessively high temperature. This ensures the stability and reliability of the riveting quality. This device can perform hot riveting on multiple points on the workpiece 8 at one time. Compared with the traditional method of riveting only one point at a time, it greatly shortens the overall riveting time of the workpiece 8 and significantly improves the efficiency of hot riveting operations. Especially in the scenario of mass production of workpiece 8, it can effectively improve the production progress and reduce the production cost. At the same time, the use of multi-point riveting also reduces the repeated positioning steps of the workpiece 8 in multiple riveting processes, further reducing positioning errors and ensuring the relative positional accuracy between multiple riveting points. This makes the overall riveting effect of the workpiece 8 better, the connection more firm and stable, and improves the overall quality and service life of the product.

[0032] The first auxiliary reducer 23, the second auxiliary reducer 24 and the main reducer 22 are all screwed onto the surface of the base 25. The main reducer 22 has output shafts at both ends. The main reducer 22 is fixed to the power input shafts of the first auxiliary reducer 23 and the second auxiliary reducer 24 through the output shafts on both sides.

[0033] In a preferred embodiment, the first auxiliary reducer 23, the second auxiliary reducer 24 and the main reducer 22 are combined to form the lifting and buffering mechanism of the upper base 5. The servo motor 21 drives the two sets of lead screws 20 to run synchronously through the first auxiliary reducer 23, the second auxiliary reducer 24 and the main reducer 22.

[0034] The servo motor 21, together with the main reducer 22, the first auxiliary reducer 23, the second auxiliary reducer 24 and two sets of lead screws 20, realizes the full closed displacement control of the upper base 5. At the same time, the use of the reducer can realize the function of reducing speed and increasing torque on the upper base 5, so as to avoid excessive pressure on the upper base 5 and damage to the workpiece 8.

[0035] The core structure of the speed reducer is a transmission system composed of multiple gears of different sizes. When the output shaft of the servo motor 21 drives the input shaft of the main speed reducer 22 to rotate, the small gear inside the main speed reducer 22 drives the large gear to rotate. Since the number of teeth on the small gear is much less than that on the large gear, the small gear rotates far more times in the same amount of time than the large gear, thus significantly reducing the speed of the output shaft of the main speed reducer 22 compared to the input shaft. This is the core mechanism of "speed reduction". Subsequently, the output shaft of the main speed reducer 22 drives the first auxiliary speed reducer 23 and the second auxiliary speed reducer 24 respectively. Through the same gear transmission logic, the speed is further optimized, and finally the rotational speed of the two sets of lead screws 20 is significantly reduced compared to the original output speed of the servo motor 21, thereby driving the upper base 5 to achieve lifting and lowering at a smoother and more controllable speed. "Torque increase" is based on the principle of energy conservation. In the process of power transmission, ignoring transmission losses, power = torque * speed, which remains constant. When the speed reducer reduces speed through gear transmission... At low speeds, to maintain constant power, torque increases proportionally. Specifically, the output torque of the servo motor 21 is fixed. After passing through multiple gear transmissions of the main reducer 22, the first auxiliary reducer 23, and the second auxiliary reducer 24, the reduction ratio of each reducer corresponds to the same proportional torque amplification ratio. That is, the larger the reduction ratio, the higher the torque amplification factor. When this amplified torque is transmitted to the two sets of lead screws 20, it can effectively overcome the weight of the upper base 5 itself, the weight of the platform 51, and the resistance of the workpiece 8 hot riveting column encountered by the multiple sets of hot riveting mechanisms 6 when hot riveting downwards. This ensures that even if the upper base 5 bears a large load during the descent, it can still maintain a stable motion state, avoiding jamming, stagnation, or decreased motion accuracy due to insufficient torque. Ultimately, it achieves the dual control effect of "reduction and torque amplification" for the upper base 5, which not only meets the requirements for smooth motion speed during hot riveting but also ensures sufficient force required when the hot riveting mechanism 6 presses down, ensuring that the hot riveting column can be fully melted and high-quality riveting is completed.

[0036] In a preferred embodiment, the hot riveting mechanism 6 includes an adjusting column 61 fixedly connected to the bottom of the platform 51, and the adjusting column 61 has two sets of adjusting holes 62 inside. At the same time, adjusting studs 63 are inserted into the two sets of adjusting holes 62, and the adjusting studs 63 pass through the adjusting holes 62 and are fixed by nuts. A hot riveting seat 64 is fixedly connected to the root of the adjusting studs 63.

[0037] A connecting post 65 is fixedly connected to the bottom of the hot riveting base 64. A cylindrical heating rod is inserted inside the hot riveting base 64. A hot riveting head 66 is fixedly installed at the bottom of the connecting post 65. A hot riveting space 661 is opened inside the hot riveting head 66. Multiple anti-slip grooves 662 are equally spaced on the inner wall of the hot riveting space 661.

[0038] like Figure 6 and Figure 7As shown: By cooperating with the two sets of adjustment holes 62 inside the adjustment column 61 and the adjustment stud 63, the position of the hot riveting base 64 can be flexibly adjusted in the horizontal and vertical directions, thereby accurately setting the working coordinates of the hot riveting head 66 and greatly improving the adaptability and versatility of the equipment to different workpiece riveting points; the adjustment stud 63 is fixed by a nut to ensure that the position is firmly locked after adjustment, ensuring the stability and reliability of the riveting operation; the cylindrical heating rod inserted in the hot riveting base 64 can provide an efficient and uniform heat source, and the heat is directly conducted to the hot riveting head 66 through the connecting column 65, with high thermal efficiency and rapid temperature control response; the hot riveting space 661 opened inside the hot riveting head 66 is its core working area, and the multiple sets of anti-slip grooves 662 evenly distributed on its inner wall can effectively increase the friction with the plastic rivet, prevent slippage or displacement during the riveting process, and ensure that the hot riveting head 66 can reliably clamp, rotate and melt the rivet, ultimately forming a rivet head with a regular shape and strong bonding force, significantly improving the riveting quality and product consistency.

[0039] Working principle: In actual use, the workpiece 8 to be riveted is clamped and fixed on the lower base 7 using the tooling fixture 71. At this time, the external switch of the servo motor 21 is activated, and the output shaft of the servo motor 21 drives the output shafts located on both sides of the main reducer 22 to rotate. At the same time, it drives the first auxiliary reducer 23 and the second auxiliary reducer 24 to work. The first auxiliary reducer 23 and the second auxiliary reducer 24 drive the two sets of lead screws 20 to move synchronously. The two sets of lead screws 20 are screwed into the drive seats located on both sides of the upper base 5, realizing the lifting and lowering of the upper base 5. The upper base 5 moves downward, driving the... The bottom platform 51 and multiple sets of hot riveting mechanisms 6 move downwards. At the same time, the hot riveting mechanisms 6, which are in a high-temperature state, move downwards. The temperature controller controls the temperature of the hot riveting mechanisms 6, melting and pressing down the hot riveting pins of the parts, and riveting the two products to be connected together. This can complete the hot riveting work of the workpiece 8. Multiple points on the workpiece 8 can be hot riveted at one time, up to 32 points. The equipment can complete the hot riveting of up to 32 points in one operation, which greatly improves work efficiency and reduces the processing time of the workpiece 8. All riveting points on the workpiece 8 are hot riveted synchronously, eliminating the problem of uneven force due to separate hot riveting, thus improving the yield and service life of the workpiece 8.

Claims

1. A servo-driven hot riveting device, comprising a frame (1), characterized in that: A lower base (7) is fixedly installed on the workbench of the frame (1), and a tooling fixture (71) is installed on the surface of the lower base (7). At the same time, a workpiece (8) is fixed on the surface of the tooling fixture (71). An upper base (5) is installed on the upper side of the lower base (7), and a platform (51) is fixedly connected to the bottom of the upper base (5). At the same time, multiple sets of hot riveting mechanisms (6) are fixedly connected to the bottom of the platform (51). A lifting mechanism (2) is installed below the lower base (7), and the lifting mechanism... The structure (2) includes a base (25) installed on the side wall of the frame (1), and a servo motor (21) is fixedly installed in the middle of the base (25). The output shaft of the servo motor (21) is fixed to the power input shaft of the main reducer (22) through a coupling. A second auxiliary reducer (24) is installed on one side of the main reducer (22), and a first auxiliary reducer (23) is installed on the other side of the main reducer (22). A control cabinet (3) is installed on one side of the frame (1).

2. The servo-driven hot riveting device according to claim 1, characterized in that: The tooling fixture (71) consists of three sets of clamping platforms, and two sets of waist holes are opened on both sides of the bottom plate of the clamping platform. At the same time, the top of the tooling fixture (71) is arranged opposite to multiple sets of hot riveting mechanisms (6).

3. A servo hot riveter according to claim 2, wherein: The hot riveting mechanism (6) is fixedly connected to the upper base (5) via the platform (51), and two sets of positioning holes are provided on both sides of the upper base (5). Positioning rods (9) are inserted into the two sets of positioning holes, and the positioning rods (9) are fixedly connected to the frame inside the machine frame (1). A drive seat is installed on the upper base (5).

4. A servo hot riveter according to claim 3, wherein: The upper base (5) is driven to lift by a lifting mechanism (2). The lifting mechanism (2) also includes a lead screw (20), which is screwed into the drive seats located at both ends of the upper base (5). The two sets of lead screws (20) are fixed to the output shafts of the first reducer (23) and the second reducer (24), respectively. A drag chain (4) is installed on the upper base (5).

5. A servo-driven hot riveting device according to claim 4, characterized in that: The first auxiliary reducer (23), the second auxiliary reducer (24) and the main reducer (22) are all screwed onto the surface of the base (25). The main reducer (22) has output shafts at both ends. The main reducer (22) is fixed to the power input shafts of the first auxiliary reducer (23) and the second auxiliary reducer (24) through the output shafts on both sides respectively.

6. A servo hot riveter according to claim 5, wherein: The first auxiliary reducer (23), the second auxiliary reducer (24) and the main reducer (22) are combined to form the lifting and buffering mechanism of the upper base (5). The servo motor (21) drives the two sets of lead screws (20) to run synchronously through the first auxiliary reducer (23), the second auxiliary reducer (24) and the main reducer (22).

7. A servo hot riveter according to claim 3 wherein: The hot riveting mechanism (6) includes an adjusting column (61) fixedly connected to the bottom of the platform (51), and the adjusting column (61) has two sets of adjusting holes (62) inside. At the same time, adjusting studs (63) are inserted into the two sets of adjusting holes (62), and the adjusting studs (63) pass through the adjusting holes (62) and are fixed by nuts. A hot riveting seat (64) is fixedly connected to the root of the adjusting studs (63).

8. A servo-driven hot riveting device according to claim 7, characterized in that: The bottom of the hot riveting base (64) is fixedly connected to a connecting column (65), a cylindrical heating rod is inserted inside the hot riveting base (64), and a hot riveting head (66) is fixedly provided at the bottom of the connecting column (65). A hot riveting space (661) is opened inside the hot riveting head (66), and multiple anti-slip grooves (662) are equally spaced on the inner wall of the hot riveting space (661).

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