Automatic hemming device applied to steel door panel

Abstract

The invention relates to the technical field of steel door panel hemming, in particular to an automatic hemming device applied to a steel door panel, which comprises a power component and a connecting mechanism, the power component comprises a protective shell and a power gear, the connecting mechanism is mounted on the side surface of the power component, two ends of the connecting mechanism are composed of connecting components, and a telescopic cylinder is arranged in the middle of each connecting component. The telescopic cylinder can drive the two ends of the connecting mechanism to rotate while freely stretching out and drawing back; the base mechanism is installed beside the connecting assembly, a moving assembly is arranged in the base mechanism, and the connecting assembly close to the base mechanism penetrates through the moving assembly; the hemming assembly is installed in the middle of the base mechanism, a rotating shaft is arranged in the middle of the hemming assembly, and the rotating shaft is connected with the connecting assembly closest to the base mechanism; and the adjusting mechanism is mounted on the base mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of hemming of steel door panels, and particularly to an automatic hemming device applied to steel door panels. Background Art

[0002] The main purposes of hemming steel door panels are to enhance structural strength, improve safety, aesthetics and functionality. Steel door panels are generally thin and are prone to deformation when used directly. After hemming, a closed structure is formed, greatly enhancing the bending resistance and making the door panel more durable. When subjected to external impact, the hemmed structure can effectively disperse stress and reduce the risk of deformation or damage. The edges of the steel plate are sharp after cutting. If not hemmed, it is easy to scratch installers and users. After hemming, a smooth arc edge is formed, reducing potential safety hazards, especially suitable for steel doors used in homes or public places. Steel door panels usually need to be assembled with door frames or other structural components. The hemmed door panels can form a more secure connection with the door frames, improving the overall stability. Hemming can also reserve installation slots, facilitating the filling of sealing materials and improving the airtightness and gas tightness of the door. Many steel doors (such as fire doors, soundproof doors) need to be filled with materials such as rock wool, polyurethane or honeycomb paper inside the panel. After hemming, the filling materials can be encapsulated inside and are not easily detached, improving durability. By optimizing the hemmed structure, the sound insulation and heat insulation effects of the door can be improved to meet the building energy conservation requirements.

[0003] A steel door hemming device is a device used to perform hemming and bending treatment on the edges of steel door panels, mainly used to enhance the structural strength, aesthetics and safety of the door body. Steel door hemming devices usually use mechanical rolling, die stamping or hydraulic bending methods to achieve hemming. The specific working principle is as follows: Feeding and positioning: The door panel enters the hemming station through the conveying mechanism and is fixed by the clamping mechanism. Pre-bending: The edge of the door panel is preliminarily bent by the bending mechanism to prepare for subsequent hemming. Hemming and forming: The edge is gradually curled to a preset angle by using a rolling wheel, a stamping die or a hydraulic arm. Shaping and compaction: After hemming is completed, shaping treatment is carried out to ensure that the hemmed bend is consistent and there is no springback or deformation. Finished product output: The hemmed door panel is sent out through the conveying mechanism and enters the next process, such as welding or spraying.

[0004] Although the above-mentioned prior art has certain progressiveness, during the hemming process, the thickness values of different models of steel doors vary greatly. When the same hemming device is used to hem steel doors with different thicknesses, the debugging is rather troublesome, and the large volume of the steel door is not conducive to improving work efficiency. To a certain extent, the quality of hemming depends on the stability of the steel door during the hemming operation.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs an automatic hemming device applied to steel door panels, which solves the above technical problems. Summary of the Invention

[0006] The technical object to be achieved by the present invention is to design an automatic hemming device for steel door panels. For steel doors of different thicknesses, a driving motor drives a telescopic component to rotate, thereby driving a moving block to move up and down, so as to quickly adjust the gap between the hemming components, ensuring the efficiency and quality of hemming; and a suction cup component is provided to improve the hemming stability of the steel door and ensure the quality of the hemmed finished product.

[0007] In order to achieve the above technical object, the present invention provides the following technical solutions: An automatic hemming device for steel door panels, including a power component. The power component includes a protective shell and power gears. There are 2 power gears, and the power gears mesh with each other. One of the power gears is driven by an external power source, so that the two power gears rotate in opposite directions, thereby driving 2 hemming components to rotate in opposite directions. It also includes: A connection mechanism, installed on the side of the power component. The two ends of the connection mechanism are composed of connection components. The connection components are used to non-rigidly connect the components installed on both sides thereof. Thus, when adjusting the gap distance between the 2 hemming components, the power component can stably provide rotational power to the hemming components. A telescopic cylinder is arranged in the middle of the connection component. The telescopic cylinder can freely expand and contract while driving the two ends of the connection mechanism to rotate, thereby realizing the stable connection between the upper power gear and the hemming component through the connection mechanism. Even if the position of the hemming component changes, the telescopic cylinder can expand and contract and then perform a coupling function; A base mechanism, installed beside the connection component. A moving block is arranged inside the base mechanism. The moving block can drive the hemming component to move, thereby controlling the distance between the 2 hemming components to adapt to steel doors of different thicknesses. The connection component close to the base mechanism penetrates through the moving block; A hemming component, installed in the middle of the base mechanism. A rotating shaft is arranged in the middle of the hemming component. The rotating shaft is connected to the connection component closest to the base mechanism. Through the connection component, the rotating shaft is driven by the power component to rotate at the same speed; An adjusting mechanism, installed on the base mechanism. The telescopic component arranged inside the adjusting mechanism rotates driven by a driving motor. When the threaded rod passes through the spiral groove in the base mechanism, the overall length of the telescopic rod and the telescopic sleeve changes, thereby driving the moving block to change its position, realizing the rapid change of the position of the moving block by the driving motor to adapt to panels of different thicknesses.

[0008] Preferably, the connection component includes a connection column, a connection chassis, a connection block, a connection notch, a connection rod and a connection ball; the connection column is arranged at one end of the connection component, the connection chassis is installed on the side of the connection column, the connection block is arranged on the side of the connection chassis, a connection notch is formed between adjacent connection blocks, the connection rod is arranged inside each connection block, and the connection ball is arranged at the center of the connection rod; when two connection components are installed oppositely, the connection notch on one connection component is engaged with the connection block on the other connection component, and the other connection ball is located between this connection ball and the connection chassis. Thus, the two connection components achieve non-rigid connection and can be deflected at a certain angle, that is, the center lines of the connection columns of the two do not need to coincide, and the components fixed on both sides can also achieve coaxial rotation.

[0009] Preferably, the base mechanism includes a base body, a fixing plate, a first mounting hole and a moving block; the base body is installed on the ground and is generally arranged in a transportation assembly line. The steel door to be curled is transported by the assembly line to the side of the base mechanism for curling. The fixing plate is installed on the base body, and there are 2 fixing plates for fixedly installing both ends of the curling component. The first mounting hole is opened in the lower part of the fixing plate and is used to accommodate the relatively fixed curling component below for rotation. The moving block is arranged inside the fixing plate and is specifically located in the movable cavity.

[0010] Preferably, the fixing plate includes a movable cavity, a rotating hole, a spiral groove, a limiting groove and a moving groove; the movable cavity is opened inside the fixing plate and is rectangular. The distance between its two sides is the same as the width value of the moving block, and the moving block can only move up and down in the movable cavity. The rotating hole is opened on the upper surface of the movable cavity and is used to accommodate the threaded rod to pass through. The spiral groove is opened on the inner surface of the rotating hole and is used to cooperate with the threaded rod to move the moving block up and down. The limiting groove is opened on the inner side surface of the movable cavity, and the cross-sectional shape of the limiting groove is trapezoidal. The limiting groove cooperates with the limiting block to further ensure that the moving block remains horizontal in the movable cavity and restricts its moving direction to only vertical up and down. The moving groove is opened on the two side surfaces of the movable cavity, and the moving groove is set in the shape of a "key". The shape of the "key" can determine the range of the up and down movement of the rotating shaft of the curling component.

[0011] Preferably, the moving block includes a limiting block, a second mounting hole, a moving hole, a rotating groove, and an annular groove; the limiting block is installed on the side of the moving block, and the cross-sectional shape of the limiting block is trapezoidal, which is installed in the limiting groove to ensure the horizontality of the moving block. The second mounting hole is opened in the middle of the moving block, and the second mounting hole is used to accommodate the rotating shaft on the upper curling component. The moving hole is opened on the upper surface of the moving block, and the rotating groove is opened below the moving hole. The rotating groove is used to accommodate the telescopic block, so that it can be driven up and down by the telescopic block. The annular groove is opened on the upper and lower surfaces of the rotating groove, and the annular groove is used to accommodate wear-resistant balls to reduce friction and avoid direct surface-to-surface friction between the telescopic block and the moving block.

[0012] Preferably, the curling component further includes a moving roller, a curling protrusion, a curling groove, and a suction cup component; the moving roller is installed outside the rotating shaft, and the two moving rollers move relative to each other, so as to transport the steel door on one side to the other side. The curling protrusion and the curling groove are arranged at both ends of the moving roller, and the curling protrusions and curling grooves of the upper and lower two curling components are arranged corresponding to each other. The curling protrusion and the curling groove are used to curl the steel door. The suction cup components are installed on the surface of the moving roller in a circumferential array.

[0013] Preferably, the suction cup component includes a suction cup block, a hollow groove, and a gas flow channel; the suction cup block is cylindrical and made of rubber. The hollow groove runs through the middle of the suction cup block, and the hollow groove is used to discharge air to form a vacuum adsorption on both sides of the steel door. The gas flow channel is opened on the side of the suction cup block. The diameter value of the gas flow channel gradually decreases from the hollow groove outwards. This setting enables the air inside the hollow groove to quickly discharge through the gas flow channel and compress the suction cup block, so as to form a vacuum environment and adsorb the steel door under negative pressure. Multiple suction cup components above and below work simultaneously to ensure the equal force on the upper and lower parts of the steel door, keep it in a horizontal state, and improve the curling quality and speed.

[0014] Preferably, the adjusting mechanism includes a protection frame, a driving motor, a telescopic component, a threaded rod, a telescopic block, and wear-resistant balls; the protection frame is installed on the upper surface of the base mechanism, the driving motor is installed inside the protection frame, and the driving motor is a bidirectional motor that can be automatically started and stopped by setting a program. The driving motor is used to drive the telescopic component to rotate. The telescopic component is installed below the driving motor, and the telescopic component is used to freely expand and contract to adapt to the movement of the moving block. The threaded rod is installed below the telescopic component, and the threaded rod is used to rotate on the spiral groove to move up and down or descend. The telescopic block is installed below the threaded rod, and the wear-resistant balls are arranged on the upper and lower surfaces of the telescopic block.

[0015] Preferably, the telescopic assembly includes a fixed rod, a telescopic rod, a telescopic sleeve and a limiting chute; the fixed rod is installed below the driving motor, the telescopic rod is installed below the fixed rod, and the telescopic rod can move within the telescopic sleeve to realize the change of the total length between the telescopic sleeve and the telescopic rod. The telescopic sleeve is installed outside the telescopic rod, and the limiting chute is opened inside the telescopic sleeve.

[0016] Preferably, the cross-section of the telescopic rod is set in a "plum blossom" shape, that is, a plurality of cylinders are overlapped on the side surface of the telescopic rod, and the cylindrical part of the telescopic rod is clamped in the limiting chute, so that the fixed rod driven by the driving motor can control the rotation of the threaded rod fixed on the telescopic sleeve.

[0017] The beneficial effects of the present invention are as follows: (1) The present invention drives the telescopic assembly to rotate through the driving motor, thereby driving the moving block to move up and down along the guide rail to precisely adjust the gap between the curling assemblies. It can flexibly adapt to steel door panels of different thicknesses without manually replacing the mold or performing cumbersome manual adjustments. Traditional curling equipment often requires complex mechanical adjustment structures, which are time-consuming and laborious during the adjustment process, and there are problems such as unstable curling quality caused by improper adjustment. The present invention realizes the rapid matching of the gap between the curling assemblies through an automated adjustment method, ensuring that an appropriate pressing force can be maintained throughout the curling process, making the edges of the curled door panels flat and uniform, and avoiding quality problems such as warping and deformation. In addition, this design also reduces the possible errors during the adjustment process, improves the processing accuracy, greatly enhances the production efficiency, enables the equipment to meet the production requirements of different models and different thicknesses of steel doors, and thus enhances the applicability and market competitiveness of the equipment.

[0018] (2) The present invention is provided with a suction cup assembly during the curling process to provide additional fixing, ensuring that the steel door panel will not shift in position due to uneven force or vibration during processing. Traditional curling devices usually rely on mechanical clamping structures to fix the door panel, but during high-speed operation, the door panel may still undergo minor displacements due to inertia or external forces, resulting in uneven curling effects or even defects such as edge wrinkling and fracture. The present invention enables the door panel to always fit tightly at the predetermined processing position through the stable adsorption force generated by the suction cup assembly. Even during high-speed curling, it can ensure that the edges of the door panel remain precisely aligned. In addition, the use of the suction cup assembly not only improves the curling quality but also reduces the direct extrusion of the mechanical clamping on the surface of the door panel, thereby reducing the risk of surface scratches or deformation. This innovative design makes the curling process more stable and reliable, further ensuring the aesthetics and consistency of the finished product, while reducing the possibility of subsequent trimming and scrapping, and improving the overall production efficiency. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Reference will now be made to the drawings, which will describe the above and other aspects of the present invention by way of example only, where: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the power assembly of the present invention; Figure 3 is a schematic diagram of the structure of the connection mechanism of the present invention; Figure 4 is a schematic diagram of the structure of the connection component of the present invention; Figure 5 is a schematic diagram of the structure of the base mechanism of the present invention; Figure 6 is a schematic diagram of the internal structure of the fixing plate of the present invention; Figure 7 is a cross-sectional view of the fixing plate of the present invention; Figure 8 is a schematic diagram of the structure of the moving block of the present invention; Figure 9 is a schematic diagram of the structure of the curling component of the present invention; Figure 10 is a cross-sectional view of the suction cup component of the present invention; Figure 11 is a schematic diagram of the structure of the adjustment mechanism of the present invention; Figure 12 is a schematic diagram of the structure of the telescopic component of the present invention; Figure 13 is a cross-sectional view of the telescopic sleeve of the present invention.

[0021] In the figure: 1. Power component; 11. Protective shell; 12. Power gear; 2. Connecting mechanism; 21. Connecting component; 211. Connecting column; 212. Connecting chassis; 213. Connecting block; 214. Connecting notch; 215. Connecting rod; 216. Connecting ball; 22. Telescopic cylinder; 3. Base mechanism; 31. Base body; 32. Fixed plate; 321. Activity cavity; 322. Rotation hole; 323. Spiral groove; 324. Limit groove; 325. Moving groove; 33. First mounting hole; 34. Moving block; 341. Limit block; 342. Second mounting hole; 343. Moving hole; 344. Rotation groove; 345. Annular groove; 4. Hemming component; 41. Rotation shaft; 42. Moving roller; 43. Hemming protrusion; 44. Hemming groove; 45. Suction cup component; 451. Suction cup block; 452. Hollow groove; 453. Gas flow channel; 5. Adjusting mechanism; 51. Protective frame; 52. Driving motor; 53. Telescopic component; 531. Fixed rod; 532. Telescopic rod; 533. Telescopic sleeve; 534. Limit sliding groove; 54. Threaded rod; 55. Telescopic block; 56. Wear-resistant rolling ball. Detailed implementation mode

[0022] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation modes.

[0023] As Figures 1-13 shown, the automatic hemming device applied to the steel door panel is mainly used for efficient and stable hemming processing of the steel door panel to ensure the processing quality of door panels with different thicknesses. The device consists of multiple core components, including a power component 1, a connecting mechanism 2, a base mechanism 3, a hemming component 4, and an adjusting mechanism 5. Each component cooperates with each other, enabling the device to complete the hemming operation efficiently and precisely.

[0024] First of all, the power component 1 of the device is the core driving part of the whole system. It mainly includes a protective shell 11 and two power gears 12. These two power gears 12 mesh with each other to form a stable power transmission structure. When an external power source drives one of the power gears 12 to rotate, the other power gear 12 will also rotate synchronously in the opposite direction. The advantage of this reverse rotation design is that it can ensure the synchronous reverse movement of the two hemming components 4, so that the edges of the steel door panel are subjected to uniform forces during the hemming process, thus avoiding processing defects caused by uneven unilateral force. At the same time, the setting of the protective shell 11 can effectively prevent external dust and impurities from entering the gear system, extend the service life of the power component 1, and improve the overall stability of the device.

[0025] Secondly, the connecting mechanism 2 is installed on the side of the power component 1, and serves to connect the power component 1 with the curling component 4. Its two ends are respectively composed of connecting components 21. The design of the connecting component 21 enables the components installed on both sides to be non-rigidly connected. The advantage of this non-rigid connection is that when adjusting the gap between the two curling components 4, the power component 1 can still stably provide power to the curling component without causing poor transmission or vibration due to changes in the adjustment process. In addition, a telescopic cylinder 22 is also provided in the middle of the connecting component 21. The telescopic cylinder 22 has a free telescopic function and can drive the two ends of the connecting mechanism 2 to rotate synchronously during the adjustment process. In this way, even if the position of the curling component 4 changes, the telescopic cylinder 22 can automatically telescope and adjust to continue to complete power transmission, thereby ensuring the stable operation of the system. This design effectively improves the adaptability of the equipment, enabling it to adapt to steel doors of different thicknesses, and reduces errors that may occur during the adjustment process.

[0026] The base mechanism 3 is installed next to the connecting component 21 as the supporting structure of the entire device to ensure the stability and accuracy of the equipment. A moving block 34 is provided inside the base mechanism 3, which can drive the curling component 4 to move within a certain range, thereby adjusting the distance between the two curling components. This design allows the equipment to flexibly adapt to steel door panels of different thicknesses, ensuring that the door panels can fit tightly against the curling component 4 during the processing process, thereby improving the uniformity and consistency of the curling effect. At the same time, the connecting component 21 close to the base mechanism 3 is installed through the moving block 34, so that the equipment remains stable during the movement, avoiding the impact of shaking or deviation during the movement on the curling quality.

[0027] The hemming assembly 4 is a processing component that directly acts on the steel door panel and is installed in the middle of the base mechanism 3. The core part of the hemming assembly 4 is the rotating shaft 41, which is connected to the connecting assembly 21 inside the base mechanism 3, so that the rotating shaft 41 can be driven by the power assembly 1 to rotate synchronously. When the power assembly 1 provides the rotational force, the rotating shaft 41 drives the hemming assembly 4 to rotate at a high speed, applying a uniform bending force to the edge of the door panel to form a stable hemming effect. This design ensures the uniformity of force during the hemming process, making the edge of the finished door panel smooth and neat, avoiding quality problems such as edge wrinkling and deformation.

[0028] Finally, the adjustment mechanism 5 is installed above the base mechanism 3 to accurately adjust the position of the curling assembly 4 so that it can adapt to door panels of different thicknesses. A telescopic assembly 53 is arranged inside the adjustment mechanism 5, and the assembly is driven by a drive motor 52. The drive motor 52 controls the rotation of the threaded rod 54, and the threaded rod 54 passes through the spiral groove 323 in the base mechanism 3, thereby driving the length change of the telescopic rod 532 and the telescopic sleeve 533. As the telescopic assembly 53 is adjusted, the position of the moving block 34 also changes, thereby achieving precise positioning of the curling assembly 4. Through this mechanism, the equipment can quickly adapt to steel door panels of different specifications without the need to manually adjust multiple components, greatly improving production efficiency and processing accuracy.

[0029] like Figure 4 As shown, the connection assembly 21 includes a connection column 211, a connection chassis 212, a connection block 213, a connection notch 214, a connection rod 215 and a connection ball 216. These components cooperate with each other to achieve a flexible non-rigid connection. The connection column 211 is arranged at one end of the connection assembly 21 to play a supporting and connecting role. The connection chassis 212 is installed on the side of the connection column 211 to provide a stable installation base to ensure the firmness of the entire assembly. The connection block 213 is installed on the side of the connection chassis 212, and a connection notch 214 is formed between multiple adjacent connection blocks 213. The existence of this notch allows the connection assembly 21 to fit into each other during assembly, thereby enhancing the flexibility of the connection.

[0030] A connecting rod 215 is provided on the inner side of the connecting block 213, and the connecting rod 215 plays a role of fixing and supporting, ensuring that the structure of the connecting component 21 will not become loose when subjected to force. A connecting ball 216 is installed at the center of the connecting rod 215. When the two connecting components 21 are installed opposite to each other, the connecting notch 214 of one component is mutually engaged with the connecting block 213 of the other component, so that the two can be tightly combined. At the same time, a connecting ball 216 is located between the other connecting ball 216 and the connecting chassis 212. Such a design forms a non-rigid connection, so that the two connecting components 21 can operate normally even if there is an angular deviation within a certain range, thereby ensuring the stable transmission of power.

[0031] The core advantage of this non-rigid connection is that it allows the two connection components 21 to be freely adjusted within a certain angle range without strictly aligning the center line of the connection column 211, so that the normal operation of the device will not be affected after adjusting the position of the moving block 34. In addition, this connection method can effectively reduce structural damage caused by mechanical vibration or force changes, and improve the durability and stability of the device.

[0032] like Figures 5-7As shown, the base mechanism 3 is the basic support structure of the entire curling device, ensuring stable and reliable operation of the equipment during operation, and at the same time providing fixing and adjusting functions for the curling assembly 4. It mainly consists of a base body 31, a fixing plate 32, a first mounting hole 33 and a moving block 34. Each part cooperates with each other to adapt to different specifications of steel door panels for efficient curling. The base body 31 is installed on the ground, usually set in an automated production line, so that the steel door to be processed can be transported along the production line to the base mechanism 3 for curling operation. This design helps to achieve large-scale and continuous production, reduce manual intervention and improve production efficiency. The fixing plate 32 is installed on the base body 31 and two pieces are provided. Its main function is to fix both ends of the curling assembly 4 to ensure the stable operation of the assembly during the curling process and avoid affecting the processing quality due to vibration or position deviation.

[0033] The first mounting hole 33 is located below the fixing plate 32. Its function is to provide a rotating space for the relatively fixed curling assembly below, enabling it to operate smoothly and complete the curling and forming of the steel door panel. At the same time, in order to adapt to door panels of different thicknesses, a moving block 34 is provided inside the base mechanism 3. The moving block 34 is installed inside the fixing plate 32 and is specifically set in the movable cavity 321. The function of the moving block 34 is to adjust the position of the curling assembly 4 to adapt to different specifications of steel doors, enabling the equipment to have a certain degree of flexibility and adjustability while meeting the requirements of standardized production, thereby improving the overall processing accuracy and applicable range.

[0034] As Figures 6-7 shown, the fixing plate 32 includes multiple functional areas, such as a movable cavity 321, a rotating hole 322, a spiral groove 323, a limiting groove 324 and a moving groove 325. The movable cavity 321 is provided inside the fixing plate 32 and its shape is rectangular. The design of its length and width matches the size of the moving block 34, enabling the moving block 34 to move up and down only within this cavity. This design effectively limits the movement range of the moving block 34, ensuring that it can only slide in the vertical direction and avoiding errors or damage caused by horizontal displacement.

[0035] The rotating hole 322 is located above the movable cavity 321 and is used to accommodate the threaded rod 54. The design of this rotating hole 322 is to cooperate with the threaded rod 54 so that the up and down movement of the moving block 34 can be precisely controlled by rotating the threaded rod 54. The spiral groove 323 is opened on the inner surface of the rotating hole 322. The threaded rod 54 interacts with the spiral groove 323 to achieve a precise transmission effect, enabling the moving block 34 to slide smoothly and adjustably up and down in the vertical direction.

[0036] To further improve stability and precision, a limiting groove 324 is also provided inside the moving cavity 321 of the fixing plate 32. The cross-section of the limiting groove 324 is designed as a trapezoid. The limiting groove 324 is used in cooperation with the limiting block 341 to ensure the horizontal stability of the moving block 34 within the moving cavity 321. Through the control of the limiting groove 324, the movement of the moving block 34 is not only restricted in the vertical direction but also remains horizontal during the movement process, thereby avoiding any phenomenon of tilting or deviating from the predetermined trajectory.

[0037] In addition, moving grooves 325 are provided on both sides of the moving cavity 321. The moving grooves 325 are designed in a "key" shape. This "key" structure can limit the up and down movement range of the rotating shaft 41 of the curling component 4 within the moving cavity 321. Through this design, it can be ensured that the movement of the rotating shaft 41 does not exceed the predetermined limit, thereby enhancing the overall precision and stability of the system.

[0038] As Figure 8 shown, the moving block 34 includes a limiting block 341, a second mounting hole 342, a moving hole 343, a rotating groove 344, and an annular groove 345; the limiting block 341 is installed on the side of the moving block 34. The cross-sectional shape of the limiting block 341 is set as a trapezoid and is installed in the limiting groove 324 to ensure the horizontality of the moving block 34. The second mounting hole 342 is opened in the middle of the moving block 34. The second mounting hole 342 is used to accommodate the rotating shaft 41 of the upper curling component 4. The moving hole 343 is opened on the upper surface of the moving block 34. The rotating groove 344 is opened below the moving hole 343. The rotating groove 344 is used to accommodate the telescopic block 55, so that it can be driven up and down by the telescopic block 55. The annular groove 345 is opened on the upper and lower surfaces of the rotating groove 344. The annular groove 345 is used to accommodate wear-resistant balls 56 to reduce friction and avoid direct surface-to-surface friction between the telescopic block 55 and the moving block 34.

[0039] As Figure 9As shown in the figure, the hemming assembly 4 further includes a moving roller 42, a hemming projection 43, a hemming groove 44, and a suction cup assembly 45. Among them, the moving roller 42 is installed outside the rotating shaft 41, and through precise design, its stable operation during rotation is ensured. The two moving rollers 42 move relatively. When one roller moves to one side, the other roller will move synchronously in the opposite direction. This design of relative movement can effectively convey the steel door clamp on one side to the other side, ensuring the continuity of the production line and the smooth processing of the steel door. The hemming projection 43 and the hemming groove 44 are respectively arranged at both ends of the moving roller 42. The hemming projection 43 protrudes from the roller surface, while the hemming groove 44 is correspondingly embedded in the roller. The hemming projections 43 and hemming grooves 44 of the upper and lower two sets of hemming assemblies 4 are arranged in one-to-one correspondence. Such a design can ensure that during the movement of the roller, the edge of the steel door accurately enters the hemming process, avoiding possible deviations or uneven hemming phenomena. Through this ingenious combination, the hemming projection 43 and the hemming groove 44 can effectively curl the edge of the steel door to form the required circular or curved shape, enhancing the aesthetics and practicality of the steel door. At the same time, the suction cup assembly 45 is also cleverly arranged on the surface of the moving roller 42 and installed in a circumferential array manner. These suction cup assemblies 45 adsorb the steel door through the negative pressure principle, ensuring that the steel door maintains a stable position during the processing process, avoiding poor hemming effects caused by position offsets, thereby improving the processing efficiency and product quality.

[0040] As Figure 10 shown in the figure, the suction cup assembly 45 includes a suction cup block 451, a hollow groove 452, and a gas flow channel 453. Among them, the suction cup block 451 is designed to be cylindrical and made of rubber material to ensure its softness and durability. The rubber suction cup block 451 can not only effectively adapt to the curved surface of the steel door surface but also has good elasticity and sealing performance, ensuring that the steel door surface is not damaged during the adsorption process. The hollow groove 452 runs through the central part of the suction cup block 451. The function of the hollow groove 452 is to discharge air, thereby forming a vacuum suction force, enabling the suction cup block 451 to tightly adsorb on both sides of the steel door. The design of the hollow groove 452 enables the suction cup block 451 to generate a strong negative pressure through adsorption during operation, ensuring that the steel door does not slide or shift during the processing process, and improving the accuracy and effect of hemming.

[0041] The gas flow channel 453 is opened on the side surface of the suction cup block 451. The delicate design makes the diameter of the gas flow channel 453 gradually decrease at the hollow groove 452. This structural design can accelerate the air outflow speed inside the hollow groove 452 and effectively discharge the air through the contraction of the gas flow channel 453. During the process of the gradual decrease of the gas flow channel 453, the gas flow rate increases, thereby compressing the internal space of the suction cup block 451 and further enhancing the negative pressure effect. Through this design, the suction cup block 451 can quickly form a vacuum environment in a short time, ensuring that a stable and uniform suction force can be provided when adsorbing the steel door.

[0042] In practical applications, multiple upper and lower suction cup assemblies 45 can work simultaneously. Through reasonable arrangement, it is ensured that the steel door is evenly stressed up and down during the processing process and maintains its horizontal state. Such a design not only improves the stability of the steel door but also optimizes the curling process. Through the precise control of the suction cup assembly 45, the quality and speed of curling can be improved, the uneven curling caused by improper position can be reduced, and the production efficiency and product quality can be significantly improved.

[0043] As Figure 11 shown, the adjusting mechanism 5 includes a protection frame 51, a driving motor 52, a telescopic assembly 53, a threaded rod 54, a telescopic block 55, and wear-resistant balls 56; the protection frame 51 is installed on the upper surface of the base mechanism 3, the driving motor 52 is installed inside the protection frame 51, the driving motor 52 is set as a bidirectional motor and can be automatically started and stopped by setting a program. The driving motor 52 is used to drive the telescopic assembly 53 to rotate. The telescopic assembly 53 is installed below the driving motor 52. The telescopic assembly 53 is used for free telescoping to adapt to the movement of the moving block 34. The threaded rod 54 is installed below the telescopic assembly 53. The threaded rod 54 is used to rotate on the spiral groove 323 to move up and down or descend. The telescopic block 55 is installed below the threaded rod 54. The wear-resistant balls 56 are arranged on the upper and lower surfaces of the telescopic block 55.

[0044] As Figure 12 shown, the telescopic assembly 53 includes a fixed rod 531, a telescopic rod 532, a telescopic sleeve 533, and a limit chute 534. Its design aims to achieve precise and flexible telescopic functions. The fixed rod 531 is installed below the driving motor 52 to ensure that the power of the driving motor 52 can be effectively transmitted to the telescopic assembly 53. The telescopic rod 532 is installed below the fixed rod 531 and is designed to be able to move freely within the telescopic sleeve 533. Using this movement, the total length between the telescopic sleeve 533 and the telescopic rod 532 can be adjusted as needed, thereby achieving precise control of different positions.

[0045] The telescopic sleeve 533 is installed outside the telescopic rod 532, and its main function is to provide support for the telescopic rod 532 and achieve the telescopic function. Through the cooperation with the telescopic rod 532, the telescopic sleeve 533 can bear the movement and adjustment pressure of the telescopic rod 532 to ensure the stability of the overall structure. The limit chute 534 is opened inside the telescopic sleeve 533, which plays a role in restricting the movement range of the telescopic rod 532 to prevent damage or instability caused by excessive extension or contraction of the telescopic rod 532.

[0046] The cross-section of the telescopic rod 532 is specially designed as a "plum blossom" shape, which is composed of multiple cylinders overlapping on the side of the telescopic rod 532. This unique design enables the cylindrical part of the telescopic rod 532 to be accurately clamped in the limit chute 534, ensuring the stable movement of the telescopic rod 532 without deviation or jamming. Through this precise cooperation, the movement of the telescopic rod 532 becomes smoother, and under the drive of the drive motor 52, it can control the rotation of the threaded rod 54 fixed on the telescopic sleeve 533 to complete the precise adjustment function. In short, the structure of this telescopic assembly 53 can provide efficient and precise telescopic adjustment, and is widely applicable to mechanical systems that require precise control and adjustment. During the working process of the present invention, the base mechanism 3 is installed in the assembly line, and the steel door to be curled is transported to one side of the curling assembly 4. The drive motor 52 works under the control system, rotates forward and backward for a certain time, the drive motor 52 drives the telescopic assembly 53 to rotate, the threaded rod 54 rotates in the rotation hole 322, and the cooperation between the threaded rod 54 and the spiral groove 323 enables the moving block 34 to move up and down to a suitable position. The telescopic block 55 rotates in the rotation groove 344, and drives the moving block 34 to move up and down under the limiting action of the limiting block 341 and the limiting groove 324. The wear-resistant rolling ball 56 rolls in the annular groove 345 to reduce friction; The rotating shaft 41 of the upper curling assembly 4 moves to a suitable position under the drive of the moving block 34. At this time, the distance between the two curling assemblies 4 is adjusted appropriately. The power assembly 1 works under the drive of an external power source, and the two power gears 12 rotate in opposite directions. Through the connection assembly 21 and the telescopic cylinder 22, the rotational torque is transmitted to the rotating shaft 41, and the moving roller 42 rotates to clamp and transport the steel door to the other side; The steel door presses the suction cup assembly 45 made of rubber, and the gas in the hollow groove 452 is quickly discharged through the gas flow channel 453. The upper and lower two suction cup assemblies 45 are deformed so that the suction cup blocks 451 above and below the gas flow channel 453 overlap to achieve negative pressure adsorption and fixation of the steel door. The steel door receives adsorption torques on both the upper and lower sides, and the steel door can be kept horizontal, so that the two ends of the steel door are curled under the action of the curling protrusion 43 and the curling groove 44.

[0047] Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein. Although one or more exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, those of ordinary skill in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. An automatic hemming device applied to a steel door panel, comprising a power assembly (1), the power assembly (1) includes a protective shell (11) and power gears (12), there are 2 power gears (12), and the power gears (12) are meshed with each other. It is characterized in that, It further includes: A connecting mechanism (2), installed on the side of the power component (1). The two ends of the connecting mechanism (2) are composed of connecting components (21). A telescopic cylinder (22) is arranged in the middle of the connecting component (21). The telescopic cylinder (22) can drive the two ends of the connecting mechanism (2) to rotate while freely telescoping; A base mechanism (3), installed beside the connecting component (21). A moving block (34) is arranged inside the base mechanism (3). The connecting component (21) close to the base mechanism (3) penetrates through the moving block (34); A curling component (4), installed in the middle of the base mechanism (3). A rotating shaft (41) is arranged in the middle of the curling component (4). The rotating shaft (41) is connected to the connecting component (21) closest to the base mechanism (3); An adjusting mechanism (5), installed on the upper surface of the base mechanism (3). The telescopic component (53) arranged inside the adjusting mechanism (5) rotates driven by a driving motor (52). When the threaded rod (54) passes through the spiral groove (323) in the base mechanism (3), the overall length of the telescopic rod (532) and the telescopic sleeve (533) changes, thereby driving the moving block (34) to change its position.

2. The automatic hemming device applied to the steel door panel according to claim 1, characterized in that: The connecting component (21) includes a connecting column (211), a connecting chassis (212), a connecting block (213), a connecting notch (214), a connecting rod (215), and a connecting ball (216); The connecting column (211) is arranged at one end of the connecting component (21). The connecting chassis (212) is installed on the side of the connecting column (211). The connecting block (213) is arranged on the side of the connecting chassis (212). A connecting notch (214) is formed between adjacent connecting blocks (213). The connecting rod (215) is arranged inside each connecting block (213). The connecting ball (216) is arranged at the center of the connecting rod (215).

3. The automatic hemming device applied to the steel door panel according to claim 1, wherein: The base mechanism (3) includes a base body (31), a fixing plate (32), a first mounting hole (33), and a moving block (34); The base body (31) is installed on the ground. The fixing plate (32) is installed on the base body (31). The first mounting hole (33) is opened in the lower part of the fixing plate (32). The moving block (34) is arranged inside the fixing plate (32).

4. The automatic edge curling device applied to a steel door panel according to claim 3, characterized in that: The fixing plate (32) includes a movable cavity (321), a rotating hole (322), a spiral groove (323), a limiting groove (324), and a moving groove (325); The movable cavity (321) is opened inside the fixing plate (32). The rotating hole (322) is opened on the upper surface of the movable cavity (321). The spiral groove (323) is opened on the inner surface of the rotating hole (322). The limiting groove (324) is opened on the inner side surface of the movable cavity (321). The moving groove (325) is opened on the two side surfaces of the movable cavity (321). The moving groove (325) is set in the shape of a "key".

5. The automatic hemming device applied to the steel door panel according to claim 3, characterized in that: The moving block (34) includes a limiting block (341), a second mounting hole (342), a moving hole (343), a rotating groove (344) and an annular groove (345); The limiting block (341) is installed on the side surface of the moving block (34), and the cross-sectional shape of the limiting block (341) is trapezoidal. The second mounting hole (342) is opened in the middle of the moving block (34), the moving hole (343) is opened on the upper surface of the moving block (34), the rotating groove (344) is opened below the moving hole (343), and the annular groove (345) is opened on the upper and lower surfaces of the rotating groove (344).

6. The automatic hemming device applied to the steel door panel according to claim 1, wherein: The curling component (4) further includes a moving roller (42), a curling protrusion (43), a curling groove (44) and a suction cup component (45); The moving roller (42) is installed outside the rotating shaft (41), the curling protrusion (43) and the curling groove (44) are arranged at both ends of the moving roller (42), and the suction cup component (45) is installed on the surface of the moving roller (42) in a circumferential array.

7. The automatic hemming device applied to the steel door panel according to claim 6, characterized in that: The suction cup component (45) includes a suction cup block (451), a hollow groove (452) and a gas flow channel (453); The suction cup block (451) is set to be cylindrical, the hollow groove (452) runs through the middle of the suction cup block (451), the gas flow channel (453) is opened on the side surface of the suction cup block (451), and the diameter value of the gas flow channel (453) gradually decreases outward from the hollow groove (452).

8. The automatic hemming device applied to the steel door panel according to claim 1, wherein: The adjusting mechanism (5) includes a protection frame (51), a driving motor (52), a telescopic component (53), a threaded rod (54), a telescopic block (55) and wear-resistant balls (56); The protection frame (51) is installed on the upper surface of the base mechanism (3), the driving motor (52) is installed inside the protection frame (51), the telescopic component (53) is installed below the driving motor (52), the threaded rod (54) is installed below the telescopic component (53), the telescopic block (55) is installed below the threaded rod (54), and the wear-resistant balls (56) are arranged above and below the telescopic block (55).

9. The automatic hemming device applied to the steel door panel according to claim 8, characterized in that: The telescopic component (53) includes a fixed rod (531), a telescopic rod (532), a telescopic sleeve (533) and a limiting sliding groove (534); The fixed rod (531) is installed below the driving motor (52), the telescopic rod (532) is installed below the fixed rod (531), the telescopic sleeve (533) is installed outside the telescopic rod (532), and the limiting sliding groove (534) is opened inside the telescopic sleeve (533).

10. The automatic hemming device applied to the steel door panel according to claim 9, characterized in that: The cross-section of the telescopic rod (532) is set to be "plum blossom" shaped, that is, the centers of multiple small circles overlap on a large circle.

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