A welding device for the inner metal chain of an elevator balance compensation chain and its usage method

Abstract

This invention discloses a welding device and method for an elevator balance compensation chain metal chain, belonging to the technical field of metal chain welding devices. It includes a base, a feeding assembly, a welding processing box, and a receiving assembly. This invention uses a multi-modal detection module and displacement sensors to accurately detect the gap and preload of the chain link end faces in real time. A vision sensor automatically identifies the weld position and surface defects, while an infrared thermal imager monitors the welding temperature field distribution throughout the process, providing comprehensive data support for process control. The intelligent control module deeply integrates real-time detection data and calls upon a built-in welding expert database. Based on the chain link material characteristics and real-time working conditions, it dynamically optimizes and adjusts the clamping force and position of the clamping and positioning module, as well as the rotation parameters of the axial drive mechanism. Finally, a laser welding gun in the welding execution module performs precise welding, which helps improve the consistency and reliability of welding quality, avoids human error, and significantly improves production efficiency and automation levels.

Description

Technical Field

[0001] This invention relates to the field of metal chain welding device technology, specifically to a metal chain welding device and its usage method for an elevator balance compensation chain. Background Technology

[0002] The elevator compensation chain connects the car and the counterweight, dynamically balancing the weight distribution of the wire rope caused by changes in the elevator's operating height. When the elevator is on different floors, the weight of the wire rope will shift between the car side and the counterweight side. The compensation chain compensates for this imbalance with its own weight, preventing the elevator from shaking or being impacted. During the manufacturing process of the elevator compensation chain, the metal chain needs to be welded to ensure a stable connection.

[0003] The existing defects in the welding device for the metal chain within the elevator balance compensation chain are: 1. Patent document US4073428A discloses a method and apparatus for continuous welding of precious metal chains or electroplating of precious metals. However, the welding apparatus in the above document has a technical problem in the welding process: it relies on a single sensor or manual monitoring and cannot accurately monitor the chain link gap, preload and weld position in real time, which leads to production errors. 2. Patent document US20110174805A1 discloses an automatic transfer device for automatic welding, but the device in the above document has the technical problem that it is difficult to compensate for the assembly error of the chain links, which easily causes the weld surface to be loose. 3. Patent document JPS5942257A discloses abrasive grains for welding metals, but the device in the above document lacks a structure for real-time temperature monitoring and intelligent fan linkage, which is prone to causing the equipment to overheat. 4. Patent document CN118951260A discloses a welding equipment and welding method for metal chains. However, the welding equipment in the above document has technical problems such as the inability to monitor the clamping force distribution in real time, which can easily lead to local overload or insufficient clamping force. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device and method for the metal chain inside an elevator balance compensation chain, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for the inner metal chain of an elevator balance compensation chain, comprising a base, a feeding assembly, a welding processing box, and a receiving assembly, wherein the feeding assembly is provided at the front end of the top of the base, the welding processing box is provided at the middle of the top of the base, and the receiving assembly is provided at the tail end of the top of the base. The welding processing box includes an axial drive mechanism, a clamping and positioning module, a welding execution module, a multimodal detection module, and an intelligent control module; The axial drive mechanism includes a transmission box fixedly connected to the outer wall of the welding processing box and a set of annular drive grooves opened in the inner wall of the welding processing box. A first servo motor is installed on the front of the transmission box. A set of first transmission gears is installed at the output end of the first servo motor. A second transmission gear is meshed with the outer wall of the first transmission gear, and the outer wall of the second transmission gear is movably connected to the inside of the annular drive groove. A set of adjustment components is provided on the inner wall of the second transmission gear. The adjustment components are used to adjust the position of the clamping and positioning module. The clamping and positioning module includes a movable block, one end of which is driven by an adjustment component, and a first hydraulic cylinder is installed at the other end of the movable block. A clamping plate is installed at one end of the first hydraulic cylinder. The welding execution module includes a laser welding gun that is fixedly connected to the top of the inner wall of the welding processing box; The multimodal detection module includes a displacement sensor, a vision sensor, and an infrared thermal imager, which are respectively installed inside the welding processing box. The displacement sensor detects the gap between the chain links and the preload in real time. The vision sensor is used to identify the weld position and surface defects. The infrared thermal imager is used to monitor the welding temperature field. The intelligent control module has a built-in welding expert database, which is used to dynamically adjust the clamping positioning and rotation parameters in real time based on the detection data, and adjust the welding parameters based on the chain link material.

[0006] Preferably, both the feeding assembly and the receiving assembly include a fixed bracket, and the fixed bracket is respectively disposed at the front end and the rear end of the base. A second servo motor is installed at one end of the fixed bracket, and a material roller is installed through the output end of the second servo motor through one end of the fixed bracket.

[0007] Preferably, the adjustment assembly includes a slide rail installed on the inner wall of the second transmission gear, a slider movably connected to the inner wall of the slide rail, one end of the slider being fixedly connected to one end of the moving block, a threaded rod threaded through one side of the slider, a third servo motor installed through the inner wall of the slide rail at one end of the threaded rod, and one end of the third servo motor being fixedly connected to the outer wall of the slide rail.

[0008] Preferably, an exhaust pipe is fixedly connected to the tail end of the top of the welding processing box, a metal protective filter screen is installed in the middle of the inner wall of the exhaust pipe, and an activated carbon bag is placed on top of the metal protective filter screen.

[0009] Preferably, the inner wall of the annular drive groove is provided with a set of annular grooves, bearings are respectively installed on both sides of the annular grooves, and an annular limiting block is movably connected between the two sets of bearings, and one side of the annular limiting block is installed on the outer wall of the second transmission gear.

[0010] Preferably, a set of guide plates is installed at the bottom of the inner wall of the welding processing box, and limit baffles are provided on both sides of the top of the guide plates.

[0011] Preferably, a negative pressure fan is connected to the top of the exhaust pipe, and a temperature sensor is provided at the bottom of the inner wall of the exhaust pipe. The temperature sensor is electrically connected to the intelligent control module. The temperature sensor monitors the welding temperature in real time and automatically activates the negative pressure fan when the welding temperature exceeds the threshold.

[0012] Preferably, the clamping surface of the clamping plate is provided with a pressure sensor array, which feeds back the clamping force distribution data to the intelligent control module in real time to dynamically correct the output pressure of the first hydraulic cylinder.

[0013] Preferably, the working steps of the metal chain welding device inside the elevator balance compensation chain are as follows: S1. The metal chain enters the welding processing box through the feeding assembly. The axial drive mechanism is started. The first servo motor drives the first transmission gear to rotate. The first transmission gear drives the meshing second transmission gear to move in the annular drive groove. The second transmission gear drives the moving block of the clamping and positioning module to move to the predetermined station through the adjustment component on its inner wall. The first hydraulic cylinder pushes the clamping plate to accurately clamp the metal chain link to be welded, ensuring that the chain link docking position is accurate. S2. The multimodal detection module uses a displacement sensor to detect the end face gap and preload data of the clamped chain links in real time, a vision sensor to scan and identify the precise position of the weld in real time, and detect whether there are defects on the surface of the chain links. An infrared thermal imager monitors the temperature field distribution of the welding area and its surroundings in real time. S3. The detection data is transmitted to the intelligent control module in real time. The intelligent control module calls the built-in welding expert database and dynamically calculates and adjusts the clamping force or position of the clamping and positioning module, the rotation angle and speed of the axial drive mechanism, and the key parameters of the welding execution module based on the detected chain link material, end face gap and preload status data, combined with the weld position identification results. S4. The laser welding gun located at the top of the inner wall of the welding processing box performs high-quality laser welding on the precisely positioned chain link weld according to the optimized parameters set by the intelligent control module. S5. During the welding process, the infrared thermal imager continuously monitors the temperature field, and the temperature sensor at the bottom of the exhaust pipe also monitors the temperature of the welding area in real time. When the welding temperature exceeds the preset safety threshold, the temperature sensor sends a signal to the intelligent control module. The intelligent control module automatically activates the external negative pressure fan to extract the welding fumes and high-temperature gases through the exhaust pipe. The fumes and gases first pass through the metal protective filter to intercept larger particles, and then pass through the activated carbon bag to adsorb harmful gases and odors before being discharged. S6. After welding is completed, the clamping and positioning module releases the welded chain link, the axial drive mechanism drives the adjustment component and the clamping and positioning module to reset, and the welded metal chain is pulled and wound up by the material collection component.

[0014] Preferably, step S3 further includes the following steps: S31. Key parameters of the welding execution module include laser power, welding speed, and focal position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a multimodal detection module and displacement sensor to accurately detect the gap and preload of the chain link end faces in real time. A vision sensor automatically identifies the weld position and surface defects, while an infrared thermal imager monitors the welding temperature field distribution throughout the process, providing comprehensive data support for process control. The intelligent control module deeply integrates real-time detection data and calls upon the built-in welding expert database. Based on the chain link material characteristics and real-time working conditions, it dynamically optimizes and adjusts the clamping force and position of the clamping and positioning module, as well as the rotation parameters of the axial drive mechanism. Finally, the laser welding gun in the welding execution module performs precise welding, which helps to improve the consistency and reliability of welding quality, avoid human error, and significantly improve production efficiency and automation level. 2. This invention uses a slide rail and a slider to form a high-rigidity linear guide mechanism, ensuring stable and non-deviation-free translation of the moving block. At the same time, the threaded rod, precisely driven by a third servo motor, forms a threaded transmission pair with the slider, which can accurately convert the rotational motion of the motor into the linear displacement of the slider along the slide rail. This is beneficial for giving the clamping and positioning module dynamic adjustment capability, enabling the intelligent control module to finely adjust the radial position of the clamping plate in real time based on the real-time data of multimodal detection, actively compensate for the assembly error or deformation of the chain link, ensure the tight fit and uniform force of the welding end face, and significantly improve the consistency and reliability of the weld. 3. This invention effectively filters harmful fumes, metal particles, and odorous gases generated during welding through the top exhaust pipe and the built-in metal protective filter and activated carbon pack, improving the environmental friendliness of emissions. The bottom guide plate and limit baffle work together to optimize the positioning effect of the weldment and improve the welding stability. Furthermore, through the linkage of temperature sensor, intelligent control module, and negative pressure fan, real-time monitoring of welding temperature is achieved. The fan is intelligently activated only when the temperature exceeds the standard, which not only ensures the timely and powerful extraction of high-temperature fumes to protect safety and equipment life, but also significantly reduces unnecessary energy consumption and improves the level of intelligence and overall energy efficiency of welding operations. 4. This invention integrates a pressure sensor array on the clamping surface of the clamping plate, enabling real-time, multi-dimensional dynamic monitoring of the workpiece clamping force. The array transmits the collected clamping force distribution data to the intelligent control module in real time, allowing the system to accurately identify local overloads or insufficient clamping forces. Based on this data, the intelligent control module can dynamically adjust the output pressure of the first hydraulic cylinder to achieve closed-loop precise control of the clamping force, thereby improving the safety and reliability of clamping. This avoids workpiece deformation or damage caused by excessive local pressure and prevents workpiece displacement or detachment caused by insufficient clamping force, ensuring that the workpiece maintains a uniform and stable clamping state even under complex working conditions, thus improving processing accuracy and operational safety. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the top of the welding processing box of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the front structure of the welding processing box of the present invention; Figure 5 This is a three-dimensional schematic diagram of the second transmission gear structure of the present invention; Figure 6 This is a side sectional view of the welding processing box of the present invention; Figure 7 This is a schematic diagram of the system flow of the present invention; Figure 8 This is a schematic diagram of the workflow of the present invention.

[0017] In the diagram: 1. Base; 2. Feeding assembly; 3. Welding processing box; 4. Receiving assembly; 5. Axial drive mechanism; 6. Clamping and positioning module; 7. Welding execution module; 8. Multimodal detection module; 9. Intelligent control module; 10. Transmission box; 11. Annular drive groove; 12. First servo motor; 13. First transmission gear; 14. Second transmission gear; 15. Moving block; 16. First hydraulic cylinder; 17. Clamping plate; 18. Laser welding gun; 19. Displacement sensor; 20. Vision. 21. Sensor; Infrared thermal imager; 22. Welding expert database; 23. Fixed bracket; 24. Second servo motor; 25. Material roller; 26. Slide rail; 27. Slider; 28. Threaded rod; 29. ​​Third servo motor; 30. Exhaust pipe; 31. Metal protective filter; 32. Activated carbon bag; 33. Annular groove; 34. Bearing; 35. Annular limiting block; 36. Guide plate; 37. Limiting baffle; 38. Negative pressure fan; 39. Temperature sensor; 40. Pressure sensor array. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Example 1: Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 An embodiment of the present invention provides a welding device for the metal chain inside an elevator balance compensation chain, comprising a base 1, a feeding component 2, a welding processing box 3, and a receiving component 4. The feeding component 2 is provided at the front end of the top of the base 1, the welding processing box 3 is provided in the middle of the top of the base 1, and the receiving component 4 is provided at the tail end of the top of the base 1. The welding processing box 3 includes an axial drive mechanism 5, a clamping and positioning module 6, a welding execution module 7, a multimodal detection module 8, and an intelligent control module 9; The axial drive mechanism 5 includes a transmission box 10 fixedly connected to the outer wall of the welding processing box 3 and a set of annular drive grooves 11 opened in the inner wall of the welding processing box 3. A first servo motor 12 is installed on the front of the transmission box 10. A set of first transmission gears 13 is installed at the output end of the first servo motor 12. A second transmission gear 14 is meshed with the outer wall of the first transmission gear 13, and the outer wall of the second transmission gear 14 is movably connected to the inside of the annular drive grooves 11. A set of adjustment components is provided on the inner wall of the second transmission gear 14. The adjustment components are used to adjust the position of the clamping and positioning module 6. The clamping and positioning module 6 includes a movable block 15, one end of which is driven by an adjustment component, and a first hydraulic cylinder 16 is installed at the other end of the movable block 15. A clamping plate 17 is installed at one end of the first hydraulic cylinder 16. The welding execution module 7 includes a laser welding gun 18 that is fixedly connected to the top of the inner wall of the welding processing box 3; The multimodal detection module 8 includes a displacement sensor 19, a vision sensor 20, and an infrared thermal imager 21, which are respectively installed inside the welding processing box 3. The displacement sensor 19 detects the gap between the chain links and the preload in real time. The vision sensor 20 is used to identify the weld position and surface defects. The infrared thermal imager 21 is used to monitor the welding temperature field. The intelligent control module 9 has a built-in welding expert database 22, which is used to dynamically adjust the clamping positioning and rotation parameters in real time based on the detection data, and adjust the welding parameters based on the chain link material. Furthermore, the multimodal detection module 8 and displacement sensor 19 accurately detect the gap and preload of the chain link end faces in real time. The vision sensor 20 automatically identifies the weld position and surface defects, while the infrared thermal imager 21 monitors the welding temperature field distribution throughout the process, providing comprehensive data support for process control. The intelligent control module 9 deeply integrates the real-time detection data and calls the built-in welding expert database 22. Based on the chain link material characteristics and real-time working conditions, it dynamically optimizes and adjusts the clamping force and position of the clamping and positioning module 6 and the rotation parameters of the axial drive mechanism 5. Finally, the laser welding gun 18 in the welding execution module 7 performs precise welding, which helps to improve the consistency and reliability of welding quality, avoid human error, and significantly improve production efficiency and automation level.

[0022] Example 2: Please refer to Figure 1 In one embodiment of the present invention, both the feeding assembly 2 and the receiving assembly 4 include a fixed bracket 23, and the fixed bracket 23 is respectively disposed at the front end and the rear end of the base 1. A second servo motor 24 is installed at one end of the fixed bracket 23, and a material roller 25 is installed through the output end of the second servo motor 24 through one end of the fixed bracket 23. Furthermore, the fixed brackets 23 are securely installed at the front and rear ends of the base 1, respectively. The second servo motor 24 directly drives the material roller 25 that passes through the bracket, realizing precise active feeding and synchronous take-up of the metal chain coil. This integrated design not only simplifies the transmission structure and reduces the failure rate, but also ensures that the metal chain maintains constant feeding and take-up tension during the welding process through the precise speed control of the servo motor, avoiding the chain from becoming loose or overstretched. This allows for smooth coordination with the precise welding actions in the welding processing box 3, significantly improving the continuity and stability of the entire production line.

[0023] Example 3: Please refer to Figure 2 and Figure 5 An embodiment of the present invention provides: the adjustment component includes a slide rail 26 installed on the inner wall of the second transmission gear 14, a slider 27 movably connected to the inner wall of the slide rail 26, one end of the slider 27 being fixedly connected to one end of the moving block 15, a threaded rod 28 threaded through one side of the slider 27, a third servo motor 29 being installed through the inner wall of the slide rail 26 at one end of the threaded rod 28, and one end of the third servo motor 29 being fixedly connected to the outer wall of the slide rail 26; Furthermore, the slide rail 26 and the slider 27 form a high-rigidity linear guide mechanism, ensuring stable and unbiased translation of the moving block 15. At the same time, the threaded rod 28, precisely driven by the third servo motor 29, forms a threaded transmission pair with the slider 27, which can accurately convert the rotational motion of the motor into the linear displacement of the slider 27 along the slide rail 26. This is beneficial for giving the clamping and positioning module 6 dynamic adjustment capability, enabling the intelligent control module 9 to finely adjust the radial position of the clamping plate 17 in real time based on the real-time data of multimodal detection, actively compensate for the assembly error or deformation of the chain links, ensure the tight fit and uniform force of the welding end face, and significantly improve the consistency and reliability of the weld.

[0024] Example 4: Please refer to Figure 1 , Figure 4 and Figure 6 In one embodiment of the present invention: an exhaust pipe 30 is fixedly connected to the tail end of the top of the welding processing box 3, a metal protective filter 31 is installed in the middle of the inner wall of the exhaust pipe 30, and an activated carbon bag 32 is placed on the top of the metal protective filter 31. A set of guide plates 36 are installed at the bottom of the inner wall of the welding processing box 3, and limit baffles 37 are provided on both sides of the top of the guide plates 36; A negative pressure fan 38 is connected to the top of the exhaust pipe 30. A temperature sensor 39 is provided at the bottom of the inner wall of the exhaust pipe 30. The temperature sensor 39 is electrically connected to the intelligent control module 9. The temperature sensor 39 monitors the welding temperature in real time and automatically activates the negative pressure fan 38 when the welding temperature exceeds the threshold. Furthermore, the exhaust pipe 30 at the top, along with the built-in metal protective filter 31 and activated carbon pack 32, effectively filters harmful fumes, metal particles, and odorous gases generated during welding, improving environmental friendliness. The bottom guide plate 36 and the limiting baffle 37 work together to optimize the positioning effect of the weldment and improve welding stability. The linkage between the temperature sensor 39, the intelligent control module 9, and the negative pressure fan 38 enables real-time monitoring of the welding temperature. The fan is intelligently activated only when the temperature exceeds the limit, ensuring timely and powerful extraction of high-temperature fumes to guarantee safety and equipment lifespan, while significantly reducing unnecessary energy consumption and improving the level of intelligence and overall energy efficiency of welding operations.

[0025] Example 5: Please refer to Figure 2 , Figure 3 and Figure 4 In one embodiment of the present invention, an annular drive groove 11 has a set of annular grooves 33 on its inner wall, bearings 34 are respectively installed on both sides of the annular grooves 33, and an annular limiting block 35 is movably connected between the two sets of bearings 34, and one side of the annular limiting block 35 is installed on the outer wall of the second transmission gear 14. Furthermore, by opening an annular groove 33 on the inner wall of the annular drive groove 11 and symmetrically installing bearings 34 on both sides, a low-friction, high-precision rotational support is provided for the annular limiting block 35. The annular limiting block 35 is movably connected between the two sets of bearings 34 and rigidly fixed to the outer wall of the second transmission gear 14, forming a stable linkage structure. This design significantly improves the smoothness and coaxiality of the second transmission gear 14 running in the annular drive groove 11, effectively suppresses radial offset and vibration, and reduces transmission loss. At the same time, the cooperation between the annular limiting block 35 and the bearings 34 not only constrains the axial movement of the gear, but also ensures that it can rotate smoothly along the set trajectory, enhancing the rigidity, durability and motion accuracy of the transmission system, and making it suitable for high-load or precision transmission scenarios.

[0026] Example 6: Please refer to Figure 5 In one embodiment of the present invention, the clamping surface of the clamping plate 17 is provided with a pressure sensor array 40, and the pressure sensor array 40 feeds back the clamping force distribution data to the intelligent control module 9 in real time, which is used to dynamically correct the output pressure of the first hydraulic cylinder 16. Furthermore, by integrating a pressure sensor array 40 on the clamping surface of the clamping plate 17, real-time multi-dimensional dynamic monitoring of the workpiece clamping force is achieved. This array transmits the collected clamping force distribution data to the intelligent control module 9 in real time, enabling the system to accurately identify local overload or insufficient clamping force. Based on this data, the intelligent control module 9 can dynamically adjust the output pressure of the first hydraulic cylinder 16 to achieve closed-loop precise control of the clamping force, thereby improving the safety and reliability of clamping. This avoids workpiece deformation or damage caused by excessive local pressure and prevents workpiece displacement or detachment caused by insufficient clamping force, ensuring that the workpiece can maintain a uniform and stable clamping state under complex working conditions, thereby improving processing accuracy and operational safety.

[0027] Example 7: Please refer to Figure 7 and Figure 8 The present invention provides an embodiment of the working steps of the metal chain welding device within the elevator balance compensation chain as follows: S1. The second servo motor 24 of the feeding assembly 2 drives the material roller 25 to release the metal chain link. The chain link enters the welding processing box 3 via the guide plate 36, and the limiting baffle 37 ensures that the chain link is axially aligned. S2. The first servo motor 12 drives the first transmission gear 13, which in turn drives the second transmission gear 14 to rotate in the annular drive groove 11. The annular limiting block 35 slides stably in the annular groove 33 through the bearing 34 to achieve circumferential motion. The third servo motor 29 drives the threaded rod 28 to push the slider 27 to move along the slide rail 26, which drives the clamping and positioning module 6 to adjust its position radially. The first hydraulic cylinder 16 pushes the clamping plate 17 to clamp the chain link. The pressure sensor array 40 feeds back the clamping force distribution data to the intelligent control module 9 in real time and dynamically adjusts the hydraulic cylinder pressure to ensure uniform force. S3, displacement sensor 19 scans the gap and preload of the chain link end face, vision sensor 20 identifies the precise location of the weld and surface defects, infrared thermal imager 21 establishes the initial temperature field model of the chain link, and transmits all detection data to the intelligent control module 9 in real time; S4, the intelligent control module 9 retrieves the welding expert database 22, and dynamically calculates the rotation angle and radial compensation of the clamping and positioning module 6, the power, focal length, movement trajectory and rotation speed of the laser welding gun 18 and the axial drive mechanism 5 based on the chain link material and detection data. S5. The laser welding gun 18 welds according to the planned path. The infrared thermal imager 21 monitors the temperature field of the molten pool throughout the process. When the temperature exceeds the threshold, the intelligent control module 9 automatically activates the negative pressure fan 38, which extracts smoke and dust through the exhaust pipe 30. S6. During the welding process, displacement sensor 19 monitors the deformation of chain links in real time, vision sensor 20 tracks the weld formation quality, and intelligent control module 9 compares the preset process parameters, fine-tunes the clamping position of the adjustment components, adjusts the laser power and moving speed, and controls the axial rotation speed to optimize heat input. S7. After welding is completed, the chain links continue to rotate and cool. The infrared thermal imager 21 confirms that the temperature has dropped to a safe range. The clamping plate 17 releases the chain links, and the second servo motor 24 of the take-up assembly 4 drives the material roller 25 to wind up the finished chain.

[0028] The working principle involves real-time and precise detection of the chain link end face gap and preload through the multimodal detection module 8 and displacement sensor 19. The vision sensor 20 automatically identifies the weld position and surface defects, while the infrared thermal imager 21 monitors the welding temperature field distribution throughout the process, providing comprehensive data support for process control. The intelligent control module 9 deeply integrates the real-time detection data and calls upon the built-in welding expert database 22. Based on the chain link material characteristics and real-time working conditions, it dynamically optimizes and adjusts the clamping force and position of the clamping and positioning module 6, as well as the rotation parameters of the axial drive mechanism 5. Finally, the laser welding gun 18 in the welding execution module 7 performs precise welding, which helps improve the consistency and reliability of welding quality, avoids human error, and significantly improves production efficiency and automation level. The fixed brackets 23 are securely installed at the front and rear ends of the base 1, respectively. The second servo motor 24 directly drives the material roller 25 that passes through the bracket, realizing precise active feeding and synchronous take-up of the metal chain coil. This integrated design not only simplifies the transmission structure and reduces the failure rate, but also ensures that the metal chain maintains constant feeding and take-up tension during the welding process through precise speed control of the servo motor, avoiding chain loosening or excessive stretching. This forms a smooth coordination with the precise welding action in the welding processing box 3, significantly improving the continuity and stability of the entire production line. The slide rail 26 and the slider 27 form a high-rigidity linear guide mechanism to ensure stable and non-offset translation of the moving block 15. At the same time, the threaded rod 28, precisely driven by the third servo motor 29, forms a... The threaded transmission pair can precisely convert the rotational motion of the motor into the linear displacement of the slider 27 along the slide rail 26, which is beneficial to give the clamping and positioning module 6 dynamic adjustment capability. This allows the intelligent control module 9 to instantly fine-tune the radial position of the clamping plate 17 based on real-time data from multimodal detection, actively compensate for assembly errors or deformation of the chain links, ensure tight fit and uniform force on the welding end face, and significantly improve the consistency and reliability of the weld. Through the exhaust pipe 30 at the top and the built-in metal protective filter 31 and activated carbon bag 32, harmful fumes, metal particles and odorous gases generated during welding can be effectively filtered, improving the environmental friendliness of emissions. The bottom guide plate 36 and the limiting baffle 37 work together to optimize the positioning effect of the weldment and improve the welding stability. Furthermore, the temperature sensor 39... The linkage with the intelligent control module 9 and the negative pressure fan 38 enables real-time monitoring of the welding temperature. The fan is intelligently activated only when the temperature exceeds the limit, ensuring timely and powerful extraction of high-temperature fumes to guarantee safety and equipment lifespan, while significantly reducing unnecessary energy consumption and improving the intelligence level and overall energy efficiency of the welding operation. By opening an annular groove 33 on the inner wall of the annular drive groove 11 and symmetrically installing bearings 34 on both sides, a low-friction, high-precision rotational support is provided for the annular limiting block 35. The annular limiting block 35 is movably connected between the two sets of bearings 34 and rigidly fixed to the outer wall of the second transmission gear 14, forming a stable linkage structure. This design significantly improves the smoothness and coaxiality of the second transmission gear 14 running in the annular drive groove 11.Effectively suppressing radial offset and vibration, reducing transmission losses, the engagement of the annular limiting block 35 and the bearing 34 not only constrains the axial movement of the gear but also ensures its smooth rotation along the set trajectory, enhancing the rigidity, durability, and motion accuracy of the transmission system. Suitable for high-load or precision transmission scenarios, the system integrates a pressure sensor array 40 on the clamping surface of the clamping plate 17, enabling real-time multi-dimensional dynamic monitoring of the workpiece clamping force. This array transmits the collected clamping force distribution data to the intelligent control module 9 in real time, allowing the system to accurately identify local overloads or insufficient clamping forces. Based on this data, the intelligent control module 9 can dynamically adjust the output pressure of the first hydraulic cylinder 16, achieving closed-loop precise control of the clamping force, thereby improving the safety and reliability of clamping. This avoids workpiece deformation or damage caused by excessive local pressure and prevents workpiece displacement or detachment caused by insufficient clamping force, ensuring that the workpiece maintains a uniform and stable clamping state even under complex working conditions, improving processing accuracy and operational safety.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welding device for the inner metal chain of an elevator balance compensation chain, comprising a base (1), a feeding assembly (2), a welding processing box (3), and a receiving assembly (4), characterized in that: The base (1) is provided with a feeding component (2) at the front end of the top, a welding processing box (3) is provided in the middle of the top of the base (1), and a receiving component (4) is provided at the tail end of the top of the base (1). The welding processing box (3) includes an axial drive mechanism (5), a clamping and positioning module (6), a welding execution module (7), a multimodal detection module (8), and an intelligent control module (9); The axial drive mechanism (5) includes a transmission box (10) fixedly connected to the outer wall of the welding processing box (3) and a set of annular drive grooves (11) opened on the inner wall of the welding processing box (3). A first servo motor (12) is installed on the front of the transmission box (10). A set of first transmission gears (13) is installed at the output end of the first servo motor (12). A second transmission gear (14) is meshed with the outer wall of the first transmission gear (13). The outer wall of the second transmission gear (14) is movably connected to the inside of the annular drive groove (11). A set of adjustment components is provided on the inner wall of the second transmission gear (14). The adjustment components are used to adjust the position of the clamping and positioning module (6). The clamping and positioning module (6) includes a moving block (15), and one end of the moving block (15) is driven by an adjustment component. The other end of the moving block (15) is equipped with a first hydraulic cylinder (16), and one end of the first hydraulic cylinder (16) is equipped with a clamping plate (17). The welding execution module (7) includes a laser welding gun (18) fixedly connected to the top of the inner wall of the welding processing box (3); The multimodal detection module (8) includes a displacement sensor (19), a vision sensor (20) and an infrared thermal imager (21) installed inside the welding processing box (3). The displacement sensor (19) detects the gap between the chain links and the preload in real time. The vision sensor (20) is used to identify the weld position and surface defects. The infrared thermal imager (21) is used to monitor the welding temperature field. The intelligent control module (9) has a built-in welding expert database (22) for dynamically adjusting the clamping positioning and rotation parameters in real time based on the detection data, and adjusting the welding parameters based on the chain link material; The tail end of the top of the welding processing box (3) is fixedly connected to an exhaust pipe (30), a metal protective filter (31) is installed in the middle of the inner wall of the exhaust pipe (30), and an activated carbon bag (32) is placed on the top of the metal protective filter (31). The exhaust pipe (30) is connected to a negative pressure fan (38) at the top. A temperature sensor (39) is provided at the bottom of the inner wall of the exhaust pipe (30). The temperature sensor (39) is electrically connected to the intelligent control module (9). The temperature sensor (39) monitors the welding temperature in real time and automatically activates the negative pressure fan (38) when the welding temperature exceeds the threshold. The clamping surface of the clamping plate (17) is provided with a pressure sensor array (40), which feeds back the clamping force distribution data to the intelligent control module (9) in real time to dynamically correct the output pressure of the first hydraulic cylinder (16). The inner wall of the annular drive groove (11) is provided with a set of annular grooves (33), and bearings (34) are installed on both sides of the annular grooves (33). An annular limiting block (35) is movably connected between the two sets of bearings (34), and one side of the annular limiting block (35) is installed on the outer wall of the second transmission gear (14). A set of guide plates (36) are installed at the bottom of the inner wall of the welding processing box (3), and limit baffles (37) are provided on both sides of the top of the guide plates (36).

2. The welding device for the inner metal chain of an elevator balance compensation chain according to claim 1, characterized in that: The feeding assembly (2) and the receiving assembly (4) both include a fixed bracket (23), and the fixed bracket (23) is respectively located at the front end and the rear end of the base (1). A second servo motor (24) is installed at one end of the fixed bracket (23), and a material roller (25) is installed at the output end of the second servo motor (24) through one end of the fixed bracket (23).

3. The welding device for the inner metal chain of an elevator balance compensation chain according to claim 1, characterized in that: The adjustment assembly includes a slide rail (26) installed on the inner wall of the second transmission gear (14), a slider (27) is movably connected to the inner wall of the slide rail (26), and one end of the slider (27) is fixedly connected to one end of the moving block (15). A threaded rod (28) is threaded through one side of the slider (27), and a third servo motor (29) is installed through the inner wall of the slide rail (26) at one end, and one end of the third servo motor (29) is fixedly connected to the outer wall of the slide rail (26).

4. A method of using the welding device for the inner metal chain of the elevator balance compensation chain as described in claim 1, characterized in that, Includes the following steps: S1. The metal chain enters the welding processing box (3) through the feeding assembly (2). The axial drive mechanism (5) is started. The first servo motor (12) drives the first transmission gear (13) to rotate. The first transmission gear (13) drives the meshing second transmission gear (14) to move in the annular drive groove (11). The second transmission gear (14) drives the moving block (15) of the clamping and positioning module (6) to move to the predetermined station through the adjustment assembly on its inner wall. The first hydraulic cylinder (16) pushes the clamping plate (17) to accurately clamp the metal chain link to be welded, ensuring that the chain link docking position is accurate. S2, the multimodal detection module (8) uses the displacement sensor (19) to detect the end face gap and preload data of the clamped chain link in real time, the vision sensor (20) scans and identifies the precise position of the weld in real time and detects whether there are defects on the surface of the chain link, and the infrared thermal imager (21) monitors the temperature field distribution of the welding area and its surroundings in real time. S3. The detection data is transmitted to the intelligent control module (9) in real time. The intelligent control module (9) calls the built-in welding expert database (22). Based on the detected chain link material, end face gap and preload status data, combined with the weld position identification results, it dynamically calculates and adjusts the clamping force or position of the clamping positioning module (6), the rotation angle and speed of the axial drive mechanism (5), and the key parameters of the welding execution module (7). S4. The laser welding gun (18) located at the top of the inner wall of the welding processing box (3) performs high-quality laser welding on the precisely positioned chain link weld according to the optimized parameters set by the intelligent control module (9). S5. During the welding process, the infrared thermal imager (21) continuously monitors the temperature field, and the temperature sensor (39) at the bottom of the exhaust pipe (30) also monitors the temperature of the welding area in real time. When the welding temperature exceeds the preset safety threshold, the temperature sensor (39) sends a signal to the intelligent control module (9). The intelligent control module (9) automatically activates the external negative pressure fan (38) to extract the welding fumes and high-temperature gases through the exhaust pipe (30). The fumes and gases first pass through the metal protective filter (31) to intercept larger particles, and then pass through the activated carbon bag (32) to adsorb harmful gases and odors before being discharged. S6. After welding is completed, the clamping and positioning module (6) releases the welded chain link, the axial drive mechanism (5) drives the adjustment component and the clamping and positioning module (6) to reset, and the welded metal chain is pulled and wound up by the material receiving component (4) for collection.

5. The method of use according to claim 4, characterized in that, The S3 process also includes the following steps: S31. The key parameters of the welding execution module (7) include laser power, welding speed and focal position.

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