Turnover welding device for fastener production and machining

Abstract

The invention relates to the technical field of welding equipment, and discloses an overturning welding device for fastener production and machining, which comprises a machining table, and an angle adjusting ring table capable of adjusting the welding angle and position is arranged in the middle of the top end of the machining table; and a laser welding arm used for welding a long arm of the L-shaped bolt and a short arm of the L-shaped bolt welded with the base body connecting piece is arranged on the angle adjusting ring table. By adding and arranging the overturning eliminating mechanism, when the magnesium alloy L-shaped bolt is welded, the mechanism adopts a magnetically-driven non-contact overturning mode, and the driving rotating seat and the driven rotating seat synchronously rotate under the action of a magnetic field, so that friction vibration caused by mechanical connection can be avoided through the treatment mode, and the welding quality of the magnesium alloy L-shaped bolt is improved. The stability of the overturning process is guaranteed, the multi-angle welding requirement of the L-shaped bolt can be met through two-way synchronous driving, meanwhile, stress concentration caused by mechanical contact is reduced, and the risk of thermal wave deformation at the welding position is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, in particular to a flip welding device for producing and processing fasteners. Background Art

[0002] In the connection structure between the powertrain and chassis of fuel vehicles, magnesium alloy L-shaped bolts are often used as core fasteners for the connection between the engine and the oil pan. This type of fastener combines the characteristics of lightweight and high specific strength, which can significantly reduce the overall weight of the engine compartment, meeting the automotive industry's demand for energy conservation and emission reduction. Since the chassis needs to continuously withstand road impact loads during driving, L-shaped bolts are key connectors between the powertrain and the chassis frame, and their connection reliability directly affects the stability of the powertrain. When such bolts are fixed by welding, the weld can evenly transfer the impact load to the base structure such as the engine block or chassis longitudinal beam, avoiding the loosening of bolts or cracking of the base due to local stress concentration in traditional threaded connections, thereby extending the service life of the powertrain.

[0003] However, the inherent characteristics of magnesium alloy materials pose significant challenges to the welding process. In the traditional open welding process, magnesium is extremely chemically active and easily reacts with oxygen in the air at high temperatures to form solid magnesium oxide slag inclusions with a melting point of up to 2500°C. These slag inclusions will be distributed along the crystallization interface of the weld, destroying the continuity of the molten pool metal. At the same time, the boiling point of magnesium is close to the welding arc temperature. The high welding temperature can easily cause local evaporation of magnesium alloy. The metal vapor produced by evaporation will form bubbles in the molten pool after mixing with air, and form porosity defects after cooling and solidification. Such slag inclusions and pores will reduce the effective bearing area of ​​the weld. In severe cases, it can lead to the interruption of the impact load transmission path, causing early fatigue fracture at the connection between the bolt and the substrate, posing a potential threat to vehicle driving safety. Therefore, those skilled in the art have proposed a flip welding device for fastener production and processing to solve the above-mentioned technical problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a flip welding device for fastener production and processing, which solves the problem that magnesium alloy L-shaped bolts are prone to forming pores at the weld position during the welding process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flip welding device for fastener production and processing, comprising A processing table, wherein the middle portion of the top of the processing table is provided with an angle adjustment ring table for adjusting the welding angle and position, and a laser welding arm is provided on the angle adjustment ring table for welding the long arm of the L-shaped bolt to the short arm of the L-shaped bolt to which the base connecting part has been welded; Both sides of the front of the processing table are equipped with inspection doors for staff to inspect and maintain electrical equipment on a daily basis; A dynamic sealing mechanism is located on top of the processing table and is used to provide an adjustable seal when welding the L-bolts. The flip elimination mechanism is arranged on both sides of the middle part of the top of the processing table and is used to perform flip adjustment when welding the L-shaped bolts; The adaptive flipping mechanism is arranged on the upper part of the processing table and is used for real-time monitoring and adaptive flipping adjustment during the L-bolt welding process; The stress relief mechanism is arranged inside the flip relief mechanism and is used to perform stress relief processing on the L-shaped bolts after welding.

[0006] Preferably, the dynamic sealing mechanism includes a basic sealing seat, a basic sealing seat is fixedly connected to the middle and rear part of the top end of the processing table, a sealing strip is provided at the edge of the inner wall of the basic sealing seat, a sealing adjustment groove is provided on the top of the processing table, a rotating sealing seat is rotatably connected to the inside of the sealing adjustment groove, and the outer wall of the rotating sealing seat is in contact with the inner wall of the basic sealing seat, an opening is provided in the middle part of the front side of the rotating sealing seat, a side seat is fixedly connected to the middle part of the rear side of the top end of the processing table, a transmission shaft is rotatably connected to the middle part of the front side of the bottom end of the side seat, and the bottom end of the transmission shaft is connected to the middle part of the top end of the rotating sealing seat, a servo motor is provided at the middle part of the front side of the top end of the side seat, and the output end of the servo motor passes through the side seat and is connected to the middle part of the transmission shaft.

[0007] Preferably, the dynamic sealing mechanism also includes an argon flow channel, an argon flow channel is provided in the middle and lower part of the side seat, and one end of the argon flow channel is connected to the interior of the basic sealing seat, and a guide connection nozzle for connecting argon injection is provided on the end of the argon flow channel away from the basic sealing seat, a reflux exhaust channel is provided in the middle and upper part of the side seat, and one end of the reflux exhaust channel is connected to the interior of the basic sealing seat, and a mesh isolation plate is provided in the middle of the end of the reflux exhaust channel away from the basic sealing seat.

[0008] Preferably, the dynamic sealing mechanism also includes a reflux pipe, and a reflux pipe is provided in the middle part of the front side of the side seat, and the two ends of the reflux pipe are respectively connected to the interior of the argon flow channel and the reflux exhaust channel, and the reflux pipe is provided with an electromagnetic control valve 1 for controlling the internal connection state of the argon flow channel and the reflux exhaust channel, and the top side of the reflux exhaust channel is provided with an electromagnetic control valve 2 for controlling the flow state of argon therein.

[0009] Preferably, the flipping elimination mechanism includes a mounting seat, and mounting seats are provided on both sides of the middle part of the top of the processing table, and a mounting cavity is opened in the middle and upper part of the inner side of the mounting seat, and an active rotating seat is rotatably connected to one side of the inner side of the mounting cavity, and a limiting ring seat is provided in the middle of the outer wall of the active rotating seat, and a supporting ring seat is provided in the middle and upper part of one side of the mounting seat, and a mounting cylinder is provided inside the supporting ring seat, and one end of the mounting cylinder extends into the mounting cavity.

[0010] Preferably, the flip elimination mechanism also includes an inner cavity, an inner cavity is opened inside the mounting cylinder, a sealing piston seat is provided inside the inner cavity, and a driven rotating seat is rotatably connected to the inner middle part of the sealing piston seat, and a limited fixing seat is provided on the adjacent ends of the two mounting cylinders, and matching positioning grooves matching the long arm and short arm of the L-shaped bolt are respectively provided on the surfaces of the adjacent sides of the limit fixing seat, and a driving motor is provided on the middle and upper part of one side of the outer wall of the mounting seat, and the output end of the driving motor passes through the mounting seat and is connected to the middle part of the corresponding active rotating seat on the same side, the internal circumferential array of the active rotating seat has multiple permanent magnets, and the N pole and S pole of the permanent magnet are alternately arranged, a hollow cavity is opened inside the driven rotating seat, a ring winding is provided in the hollow cavity, and an induction coil is provided on the ring winding, and the middle part of the driven rotating seat on the same side is connected to the middle part of the corresponding limit fixing seat through a connecting rod.

[0011] Preferably, the adaptive flipping mechanism includes a top seat, a top seat is provided in the middle of the top end of the inner wall of the rotating sealing seat, an infrared thermal imager is provided on one side of the middle end of the top end of the top seat, a high-speed visual camera is provided on the other side of the middle end of the top end of the top seat, a PLC controller is provided on one side of the middle front end of the top end of the processing table, and the PLC controller is electrically connected to the drive motor.

[0012] Preferably, the stress relief mechanism includes a micro air pump, a micro air pump is provided in the middle of the top of the mounting seat, a high-speed solenoid valve is provided on the side of the top of the mounting tube close to the support ring seat, and an electromagnetic exhaust valve is provided on the side of the bottom of the mounting tube close to the support ring seat. The exhaust end of the micro air pump is connected to the air inlet of the high-speed solenoid valve through the internal flow channel in the mounting seat and the connecting pipe, and the exhaust port of the high-speed solenoid valve is connected to the interior of the inner cavity.

[0013] Working principle: When welding the L-bolts on the automobile engine and oil pan, the staff will first weld the short arm of the L-bolt to the base connector. Only after the preliminary processing of the two is completed can the subsequent welding processing be carried out; first, the dynamic sealing mechanism is started, and the staff will first place the long arm of the L-bolt to be welded and the short arm welded to the base connector in the matching positioning grooves on the two corresponding limit fixing seats, and then the servo motor on the side seat is started, and the shaft on the servo motor rotates while driving the transmission shaft at the bottom of the side seat to rotate. When rotating, it drives the rotating sealing seat at the bottom to rotate. When the rotating sealing seat rotates in the sealing adjustment groove on the rotating processing table, the position of the opening on the rotating sealing seat is rotated to the rear side, thereby forming a fully sealed welding processing chamber on the top of the processing table through the cooperation of the rotating sealing seat, the basic sealing seat and the sealing strip thereon. After that, the staff connects the argon gas delivery pipeline with the guide connecting nozzle on the argon gas flow channel. At this time, the electromagnetic control valve 1 on the reflux pipe is in a closed state, and the electromagnetic control valve 2 on the reflux discharge channel is in an open state. The argon in the argon gas delivery pipeline enters the argon gas through the guide connecting nozzle. The argon in the flow channel is finally discharged into the sealed cavity composed of the rotating seal seat and the basic seal seat. As the argon content in the sealed cavity continues to increase, the air in the sealed cavity is squeezed and discharged into the reflux discharge channel. Then, the air in the reflux discharge channel is discharged into the external environment through the gauze isolation plate on the reflux discharge channel. After the air in the sealed cavity composed of the rotating seal seat and the basic seal seat is completely exhausted, the electromagnetic control valve 2 on the reflux discharge channel is closed, and then the electromagnetic control valve 1 on the reflux pipe is opened. As the argon in the argon flow channel is continuously injected, when the excess argon in the sealed cavity composed of the rotating seal seat and the basic seal seat is discharged, the argon in the reflux discharge channel is opened. When the argon gas is discharged through the reflux discharge channel, due to the closure of the electromagnetic control valve 2 on the reflux discharge channel, the argon gas in the reflux discharge channel flows back into the argon flow channel through the reflux pipe again, and then is circulated and injected into the sealing cavity composed of the rotating seal seat and the basic seal seat. This treatment method can, on the one hand, ensure a pure argon gas environment in the sealing cavity composed of the rotating seal seat and the basic seal seat, thereby avoiding problems such as solid slag inclusions such as magnesium oxide in the subsequent welding process. On the other hand, this recycling method can also reduce the amount of argon gas used in the welding process, thereby achieving a dynamic sealing effect on magnesium alloy fasteners during welding.Then the flip elimination mechanism is started, and after a pure argon welding processing environment is constructed by the dynamic sealing mechanism, the laser welding arm on the angle adjustment ring table is started to weld the right-angle connection position of the L-shaped bolt. At the same time, the welding angle is adjusted in real time through the guidance of the angle adjustment ring table on the processing table. In the process of welding the right-angle connection position of the L-shaped bolt, due to the all-round processing of welding, it is necessary to perform synchronous angle flipping processing on the long arm and short arm of the L-shaped right-angle bolt between the two limit fixing seats. When flipping it, the drive motor on the mounting seat is first started, and the shaft of the drive motor drives the active rotor in the mounting cavity while rotating. The movable seat rotates synchronously, and the active rotating seat is guided by its upper limit ring seat to ensure its stability during rotation. When the active rotating seat rotates, the permanent magnet inside it also rotates synchronously. The permanent magnet forms a rotating magnetic field while rotating. The rotating magnetic field generated by the permanent magnet interacts with the annular winding and the induction coil in the hollow cavity. The axial driving torque is formed by the reason that the same poles repel and the opposite poles attract each other. Therefore, the active rotating seat drives the driven rotating seat in the sealing piston seat to rotate synchronously while rotating. When the driven rotating seat is driven to rotate, it drives the limit fixing seat on the same side and the L-shaped bolt component thereon through the connecting rod. Synchronous rotation, through this bidirectional synchronous rotation on both sides, the flipping requirement of the L-shaped bolt during the welding process is met, and this non-contact drive flipping method can not only avoid the heat wave problem caused by stress concentration of the components during the welding process, but also avoid the problem of flipping vibration caused by mechanical friction affecting the welding accuracy, thereby completing the non-contact flipping and vibration elimination processing of the L-shaped components during the welding process; at the same time, it adapts to the startup of the flip mechanism, and while the long arm and short arm of the L-shaped bolt are being welded, the infrared thermal imager and high-speed vision camera on the top seat are started, and the infrared thermal imager and high-speed vision camera are in real time during the welding process of the L-shaped bolt. The temperature distribution of the L-bolt welding area and the shape of the welding pool are collected, and the collected information data is transmitted to the PLC controller on the processing table for analysis. When it is analyzed that the temperature of the welding area is too high or the risk of the molten pool being offset is generated, the PLC controller sends a control signal to the drive motor on the mounting seat, so that the drive motor drives the welding parts in the matching positioning groove to compensate for the angle, ensuring the normal forming effect of the welding part. At the same time, through this kind of visual recognition and processing method, the angle of flipping is adjusted in real time to avoid problems such as porosity caused by excessive temperature at the weld position during welding, thereby completing the adaptive flipping processing of the welding parts during the welding process;After the L-bolts are welded, they are left to stand for a period of time to finalize their shape. After the welded parts are completely connected and finalized, the stress relief mechanism is activated. At this time, the micro air pump on the mounting seat is started, and the high-pressure gas generated by the micro air pump enters the high-speed solenoid valve through the internal flow channel in the mounting seat and the cooperation of the connecting pipe. At this time, the high-speed solenoid valve is started intermittently, and the electromagnetic exhaust valve at its bottom cooperates synchronously, so that the high-pressure gas in the high-speed solenoid valve enters the inner cavity in the form of intermittent pulses. The sealing piston seat and the limit fixing seat connected by the connecting rod are displaced by the thrust of the high-pressure gas. When the high-speed solenoid valve is closed, the air intake in the inner cavity is interrupted, and the sealing piston seat will continue to move due to inertia, but the gas thrust it receives suddenly decreases. Then the high-speed solenoid valve is repeatedly turned on and off, so that the sealing piston seat is accelerated and decelerated in the inner cavity. Superimposed vibration, at this time the sealing piston seat The intermittent gas injection and reciprocating movement generate low-frequency vibrations, which are transmitted to the welding workpiece in the matching positioning groove on the limit fixing seat through the connecting rod. By vibrating the welding workpiece at a low frequency, the dislocation movement is promoted to release stress. This treatment method can eliminate the internal residual stress caused by the welding process on the one hand, avoiding delayed deformation of the workpiece during subsequent use. On the other hand, it can also improve the fatigue resistance and service life of the workpiece by releasing the stress inside the workpiece, thereby completing the treatment of eliminating the internal stress of the workpiece after welding. After the processing is completed, the staff controls the servo motor on the side seat through the control equipment, so that the rotating shaft of the servo motor drives the transmission shaft and the rotating sealing seat at the bottom to reset. Then the staff takes out the processed workpiece from the opening and replaces the workpiece to be processed later, so as to facilitate the normal progress of the subsequent welding process.

[0014] The present invention provides a flip welding device for fastener production and processing. It has the following beneficial effects: 1. The present invention adds and sets a dynamic sealing mechanism. When the magnesium alloy L-bolt is welded, the mechanism forms a closed welding chamber by rotating the sealing seat and cooperating with the basic sealing seat. The sealing strip is used to enhance the sealing performance and effectively isolate the external air. With this treatment method, on the one hand, argon gas is injected through the flow channel and reused through the circulation design, which can maintain an inert environment in the chamber and avoid the generation of solid slag due to oxidation during magnesium alloy welding. On the other hand, the dynamic adjustment of the sealing chamber and the argon circulation mode can not only meet the sealing requirements of different welding stages, but also reduce argon consumption and reduce processing costs.

[0015] 2. The present invention adds and sets a flip elimination mechanism. When the magnesium alloy L-shaped bolt is welded, the mechanism adopts a magnetically driven non-contact flipping method. The active rotating seat and the driven rotating seat achieve synchronous rotation through the action of the magnetic field. This processing method can not only avoid the friction vibration caused by the mechanical connection, ensure the stability of the flipping process, and improve the welding accuracy, but also the two-way synchronous drive can meet the multi-angle welding requirements of the L-shaped bolt, while reducing the stress concentration caused by mechanical contact, reducing the risk of thermal wave deformation at the welding position, and ensuring the quality of the weld formation.

[0016] 3. The present invention adds and sets an adaptive flipping mechanism. When the magnesium alloy L-shaped bolt is welded, the mechanism monitors the status of the welding area in real time through an infrared thermal imager and a high-speed visual camera, and adjusts the flipping angle in conjunction with a PLC controller. During the welding process, this processing method can firstly capture problems such as temperature anomalies or molten pool deviation in a timely manner, and avoid welding defects by dynamically adjusting the flipping angle. Secondly, the combination of visual monitoring and automatic adjustment can reduce manual intervention, improve the continuity and consistency of the welding process, and ensure the precise position and stable formation of the weld.

[0017] 4. The present invention adds and sets a stress relief mechanism. After the magnesium alloy L-shaped bolt is welded, the mechanism uses pulsed air pressure to drive the sealing piston seat to generate low-frequency vibration, and transmits it to the welded workpiece. This processing method can not only promote the internal dislocation movement of the workpiece through vibration, release welding residual stress, and avoid delayed deformation in subsequent use, but also improve the structural stability of the workpiece through stress relief, and extend its fatigue resistance and service life. It is particularly suitable for automotive fasteners that need to withstand road impact loads, and ensure the reliability of the connection during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a schematic diagram of the side structure of the present invention; Figure 3 This is a schematic diagram of the basic sealing seat structure of the present invention; Figure 4 This is a schematic structural diagram of the rotary seal seat of the present invention; Figure 5 It is a schematic diagram of the partial structure of the mounting base of the present invention; Figure 6 It is a cross-sectional schematic diagram of the internal structure of the mounting base of the present invention; Figure 7 It is a schematic diagram of the local structure of the mounting tube of the present invention; Figure 8 It is a schematic cross-sectional view of the internal structure of the installation cylinder of the present invention; Figure 9It is a schematic cross-sectional view of the internal structure of the active rotating seat of the present invention; Figure 10 It is a schematic cross-sectional view of the internal structure of the driven rotating seat of the present invention.

[0019] Among them, 1. Processing table; 2. Inspection door; 3. Laser welding arm; 4. Angle adjustment ring; 5. Seal adjustment groove; 6. PLC controller; 7. Rotating seal seat; 8. Opening; 9. Drive shaft; 10. Servo motor; 11. Side seat; 12. Basic seal seat; 13. Argon flow channel; 14. Solenoid control valve 1; 15. Reflux discharge channel; 16. Solenoid control valve 2; 17. Gauze isolation plate; 18. Reflux pipe; 19. Guide connection nozzle; 20. Sealing strip; 21. Top seat; 22. Infrared Thermal imager; 23. High-speed vision camera; 24. Mounting seat; 25. Support ring seat; 26. Drive motor; 27. Micro air pump; 28. High-speed solenoid valve; 29. ​​Limit fixing seat; 30. Matching positioning groove; 31. Solenoid exhaust valve; 32. Active rotating seat; 33. Mounting cavity; 34. Mounting cylinder; 35. Limiting ring seat; 36. Driven rotating seat; 37. Inner cavity; 38. Sealing piston seat; 39. Connecting rod; 40. Permanent magnet; 41. Ring winding; 42. Induction coil; 43. Hollow cavity. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Please see the attached Figure 1 The embodiment of the present invention provides a flip welding device for fastener production and processing, comprising a processing table 1. An angle adjustment ring 4 for adjusting the welding angle and position is provided at the middle of the top of the processing table 1. A laser welding arm 3 is provided on the angle adjustment ring 4 for welding a long arm for welding an L-shaped bolt to a short arm of an L-shaped bolt welded to a base connector. Inspection doors 2 are provided on both sides of the front of the processing table 1 for daily inspection and maintenance of electrical equipment by staff. Please see the attached Figure 2 - Attachment Figure 3 , a dynamic sealing mechanism, which is provided on the top of the processing table 1 and is used for performing an adjustable sealing process when the L-shaped bolt is welded; The dynamic sealing mechanism includes a basic sealing seat 12, which is fixedly connected to the middle and rear part of the top of the processing table 1. A sealing strip 20 is provided at the edge of the inner wall of the basic sealing seat 12. A sealing adjustment groove 5 is provided on the top of the processing table 1. The internal rotation of the sealing adjustment groove 5 is connected to the rotating sealing seat 7, and the outer wall of the rotating sealing seat 7 is in contact with the inner wall of the basic sealing seat 12. An opening 8 is provided in the middle of the front side of the rotating sealing seat 7. The middle of the rear side of the top of the processing table 1 is fixedly connected to the side seat 11, and the middle of the front side of the bottom end of the side seat 11 is rotatably connected to the transmission shaft 9, and the bottom end of the transmission shaft 9 is connected to the middle of the top end of the rotating sealing seat 7. A servo motor 10 is provided in the middle of the front side of the top of the side seat 11, and the output end of the servo motor 10 passes through the side seat 11 and is connected to the middle of the transmission shaft 9.

[0022] When the dynamic sealing mechanism is started, the staff first places the long arm of the L-shaped bolt that needs to be welded and the short arm welded to the base connector in the matching positioning grooves 30 on the two corresponding limit fixing seats 29, and then starts the servo motor 10 on the side seat 11. While the rotating shaft on the servo motor 10 rotates, it drives the transmission shaft 9 at the bottom of the side seat 11 to rotate. While the transmission shaft 9 is driven to rotate, it also drives the rotating sealing seat 7 at its bottom to rotate. When the rotating sealing seat 7 rotates in the sealing adjustment groove 5 on the rotating processing table 1, the position of the opening 8 on the rotating sealing seat 7 is rotated to the rear side, so that a fully sealed welding processing chamber is formed on the top of the processing table 1 through the cooperation of the rotating sealing seat 7 with the basic sealing seat 12 and the sealing strip 20 thereon.

[0023] The dynamic sealing mechanism also includes an argon flow channel 13. The argon flow channel 13 is provided in the middle and lower part of the side seat 11, and one end of the argon flow channel 13 is connected to the interior of the basic sealing seat 12. A guide connection nozzle 19 for connecting argon injection is provided on the end of the argon flow channel 13 away from the basic sealing seat 12. A reflux exhaust channel 15 is provided in the middle and upper part of the side seat 11, and one end of the reflux exhaust channel 15 is connected to the interior of the basic sealing seat 12. A mesh isolation plate 17 is provided in the middle of the end of the reflux exhaust channel 15 away from the basic sealing seat 12.

[0024] Afterwards, the staff connected the argon gas delivery pipeline to the guide connecting nozzle 19 on the argon gas flow channel 13. At this time, the electromagnetic control valve 14 on the reflux pipe 18 is in a closed state, and the electromagnetic control valve 2 16 on the reflux discharge channel 15 is in an open state. The argon gas in the argon gas delivery pipeline enters the argon gas flow channel 13 through the guide connecting nozzle 19, and is finally discharged into the sealed cavity composed of the rotating sealing seat 7 and the basic sealing seat 12. As the argon gas content in the sealed cavity continues to increase, the air in the sealed cavity is squeezed and discharged into the reflux discharge channel 15. After that, the air in the reflux discharge channel 15 is discharged into the external environment through the mesh isolation plate 17 on the reflux discharge channel 15.

[0025] The dynamic sealing mechanism also includes a reflux pipe 18. The reflux pipe 18 is provided in the middle of the front side of the side seat 11. The two ends of the reflux pipe 18 are respectively connected to the interior of the argon flow channel 13 and the reflux exhaust channel 15. The reflux pipe 18 is provided with an electromagnetic control valve 14 for controlling the internal connection state of the argon flow channel 13 and the reflux exhaust channel 15. The top side of the reflux exhaust channel 15 is provided with an electromagnetic control valve 2 16 for controlling the flow state of argon therein.

[0026] After the air in the sealed cavity formed by the rotary sealing seat 7 and the basic sealing seat 12 is completely exhausted, the electromagnetic control valve 2 16 on the reflux discharge channel 15 is closed, and then the electromagnetic control valve 1 14 on the reflux pipe 18 is opened. As the argon in the argon flow channel 13 is continuously injected, when the excess argon in the sealed cavity formed by the rotary sealing seat 7 and the basic sealing seat 12 is discharged through the reflux discharge channel 15, due to the closure of the electromagnetic control valve 2 16 on the reflux discharge channel 15, the argon in the reflux discharge channel 15 flows back to the argon flow channel 13 again through the reflux pipe 18, and is then circulated and injected into the sealed cavity formed by the rotary sealing seat 7 and the basic sealing seat 12.

[0027] On the one hand, this treatment method can ensure a pure argon environment in the sealing chamber composed of the rotating sealing seat 7 and the basic sealing seat 12, avoiding problems such as solid slag inclusions such as magnesium oxide during subsequent welding. On the other hand, it can also reduce the amount of argon used during welding through this recycling method, thereby achieving a dynamic sealing effect on magnesium alloy fasteners during welding.

[0028] Please see the attached Figure 5 - Attachment Figure 7 , a flip elimination mechanism, which is arranged on both sides of the middle of the top of the processing table 1, is used to perform flip adjustment processing when welding the L-shaped bolts; The flip elimination mechanism includes a mounting seat 24. The mounting seats 24 are provided on both sides of the middle of the top of the processing table 1. A mounting cavity 33 is opened in the middle and upper part of the inner side of the mounting seat 24. An active rotating seat 32 is rotatably connected to one side of the inner side of the mounting cavity 33. A limiting ring seat 35 is provided in the middle of the outer wall of the active rotating seat 32. A supporting ring seat 25 is provided in the middle and upper part of one side of the mounting seat 24. A mounting cylinder 34 is provided inside the supporting ring seat 25, and one end of the mounting cylinder 34 extends into the mounting cavity 33.

[0029] When the flip elimination mechanism is started, after a pure argon welding processing environment is constructed by the dynamic sealing mechanism, the laser welding arm 3 on the angle adjustment ring table 4 is started to weld the right-angle connection position of the L-shaped bolt. At the same time, the welding angle is adjusted in real time through the guidance of the angle adjustment ring table 4 on the processing table 1. In the process of welding at the right-angle connection position of the L-shaped bolt, due to the all-round processing of welding, the long arm and short arm of the L-shaped right-angle bolt between the two limit fixing seats 29 need to be synchronously flipped.

[0030] Please see the attached Figure 8 - Attachment Figure 10 The flip elimination mechanism also includes an inner cavity 37. The inner cavity 37 is opened inside the mounting cylinder 34. The inner cavity 37 is provided with a sealing piston seat 38. The inner middle part of the sealing piston seat 38 is rotatably connected to the driven rotating seat 36. The two mounting cylinders 34 are provided with a limited fixed seat 29 on the adjacent end. The surface of the adjacent side of the limited fixed seat 29 is respectively provided with a matching positioning groove 30 that matches the long arm and short arm of the L-shaped bolt. The middle and upper part of one side of the outer wall of the mounting seat 24 are provided with a driving motor 26, and the driving motor 26 is provided. The output end of the driving motor 26 passes through the mounting seat 24 and is connected to the middle of the corresponding active rotating seat 32 on the same side. The internal circumferential array of the active rotating seat 32 has multiple permanent magnets 40, and the N poles and S poles of the permanent magnets 40 are arranged alternately. A hollow cavity 43 is opened inside the driven rotating seat 36, and a ring winding 41 is arranged in the hollow cavity 43. An induction coil 42 is arranged on the ring winding 41. The middle of the driven rotating seat 36 on the same side is connected to the middle of the corresponding limit fixing seat 29 through a connecting rod 39.

[0031] When it is flipped, the drive motor 26 on the mounting seat 24 is started first. The rotating shaft of the drive motor 26 drives the active rotating seat 32 in the mounting cavity 33 to rotate synchronously while rotating. The active rotating seat 32 is guided by its upper limit ring seat 35 to ensure its stability during rotation. When the active rotating seat 32 rotates, the permanent magnet 40 therein also rotates synchronously. The permanent magnet 40 forms a rotating magnetic field while rotating. The rotating magnetic field generated by the permanent magnet 40 interacts with the annular winding 41 and the induction coil 42 in the hollow cavity 43, and an axial driving torque is formed by utilizing the reason that like poles repel and opposite poles attract. Therefore, the active rotating seat 32 synchronously drives the driven rotating seat 36 in the sealing piston seat 38 to rotate synchronously while rotating. When the driven rotating seat 36 is driven to rotate, it synchronously drives the limit fixing seat 29 on the same side and the L-shaped bolt component thereon to rotate synchronously through the connecting rod 39.

[0032] Through this bidirectional synchronous rotation on both sides, the flipping requirements of the L-shaped bolts during the welding process are met. This non-contact driving flipping method can not only avoid the thermal wave problem caused by stress concentration of the components during the welding process, but also avoid the flipping vibration caused by mechanical friction affecting the welding accuracy, thereby completing the non-contact flipping and vibration elimination processing of the L-shaped components during the welding process.

[0033] Please see the attached Figure 4 , an adaptive flipping mechanism, which is arranged on the upper part of the processing table 1, is used for real-time monitoring and adaptive flipping adjustment processing during the L-shaped bolt welding process; The adaptive flipping mechanism includes a top seat 21, which is arranged in the middle of the top of the inner wall of the rotating sealing seat 7, an infrared thermal imager 22 is arranged on one side of the middle of the top of the top seat 21, and a high-speed visual camera 23 is arranged on the other side of the middle of the top of the top seat 21. A PLC controller 6 is arranged on one side of the middle front part of the top of the processing table 1, and the PLC controller 6 is electrically connected to the drive motor 26.

[0034] When the adaptable flip mechanism is started, while the long arm and the short arm of the L-shaped bolt are being welded, the infrared thermal imager 22 and the high-speed vision camera 23 on the top seat 21 are started. During the welding process of the L-shaped bolt, the infrared thermal imager 22 and the high-speed vision camera 23 collect the temperature distribution of the L-shaped bolt welding area and the shape of the welding pool in real time, and transmit the collected information data to the PLC controller 6 on the processing table 1 for analysis.

[0035] When it analyzes that the temperature in the welding area is too high or there is a risk of the molten pool being offset, a control signal is sent to the drive motor 26 on the mounting seat 24 through the PLC controller 6, so that the drive motor 26 drives the welding components in the matching positioning groove 30 to compensate for the angle, thereby ensuring the normal forming effect of the welding part. At the same time, through this kind of visual recognition and coordination processing method, the angle of real-time flipping is adjusted to avoid problems such as porosity caused by excessive temperature at the weld position during welding, thereby completing the adaptive flipping processing of the welding components during the welding process.

[0036] Please see the attached Figure 7 - Attachment Figure 8 , a stress relief mechanism, which is arranged inside the flip relief mechanism, is used to relieve stress on the L-shaped bolt after welding.

[0037] The stress relief mechanism includes a micro air pump 27, and a micro air pump 27 is provided in the middle of the top of the mounting seat 24. A high-speed solenoid valve 28 is provided on the side of the top of the mounting cylinder 34 close to the support ring seat 25, and an electromagnetic exhaust valve 31 is provided on the side of the bottom of the mounting cylinder 34 close to the support ring seat 25. The exhaust end of the micro air pump 27 is connected to the air inlet of the high-speed solenoid valve 28 through the internal flow channel in the mounting seat 24 and the connecting pipe, and the exhaust port of the high-speed solenoid valve 28 is connected to the interior of the inner cavity 37.

[0038] When the stress relief mechanism is started, the micro air pump 27 on the mounting seat 24 is started, and the high-pressure gas generated by the micro air pump 27 enters the high-speed solenoid valve 28 through the internal flow channel in the mounting seat 24 and the cooperation of the connecting pipe. At this time, the high-speed solenoid valve 28 is started intermittently, and through the synchronous cooperation of the electromagnetic exhaust valve 31 at its bottom, the high-pressure gas in the high-speed solenoid valve 28 enters the inner cavity 37 in the form of intermittent pulses, and the sealing piston seat 38 and the limit fixing seat 29 connected by the connecting rod 39 are displaced by the thrust of the high-pressure gas.

[0039] After the high-speed solenoid valve 28 is closed, the air intake in the inner cavity 37 is interrupted, and the sealing piston seat 38 will continue to move due to inertia, but the gas thrust it receives will suddenly decrease. Then the high-speed solenoid valve 28 is repeatedly turned on and off, causing the sealing piston seat 38 to vibrate superimposedly during acceleration and deceleration in the inner cavity 37. At this time, the sealing piston seat 38 is affected by the intermittent gas injection and reciprocating movement to generate low-frequency vibrations, and the low-frequency vibrations generated are transmitted through the connecting rod 39 to the welding workpiece in the matching positioning groove 30 on the limit fixing seat 29.

[0040] By vibrating the welded workpiece at a low frequency, dislocation movement is promoted to release stress. This treatment method can, on the one hand, eliminate the internal residual stress caused by the welding process and avoid delayed deformation of the workpiece during subsequent use. On the other hand, it can also improve the fatigue resistance and service life of the workpiece by releasing the stress inside the workpiece, thereby completing the elimination of the internal stress of the workpiece after welding.

[0041] During welding, when the position of the workpiece needs to be adjusted according to the specifications of the welding workpiece, the electromagnetic exhaust valve 31 on the mounting cylinder 34 is in a closed state, and the high-speed electromagnetic valve 28 is in an open state. At this time, the micro air pump 27 on the mounting seat 24 is started, and the gas discharged from the micro air pump 27 flows through the internal flow channel in the mounting seat 24 and the cooperation of the connecting pipe and then flows through the high-speed electromagnetic valve 28 into the mounting cavity 33 and the inner cavity 37. As the air pressure in the mounting cavity 33 and the inner cavity 37 continues to increase, the sealing piston seat 38 in the inner cavity 37 is driven by the air pressure to move. While moving, the sealing piston seat 38 synchronously drives the limit fixing seat 29 and the L-shaped bolt component in the matching positioning groove 30 through the connecting rod 39 to synchronously produce displacement adjustment.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A flip welding device for fastener production and processing, characterized in that: include A processing table (1), wherein an angle adjustment ring table (4) capable of adjusting the welding angle and position is provided at the middle of the top of the processing table (1), and a laser welding arm (3) for welding a long arm of an L-shaped bolt to a short arm of an L-shaped bolt to which a base connecting member has been welded is provided on the angle adjustment ring table (4); Both sides of the front of the processing table (1) are provided with inspection doors (2) for staff to inspect and maintain the electrical equipment on a daily basis; A dynamic sealing mechanism, which is arranged on the top of the processing table (1) and is used for performing an adjustable sealing process when the L-shaped bolts are welded; A flip elimination mechanism is provided on both sides of the middle portion of the top of the processing table (1) and is used for performing flip adjustment processing when welding the L-shaped bolts; An adaptive flipping mechanism, which is arranged on the upper part of the processing table (1) and is used for real-time monitoring and adaptive flipping adjustment during the L-shaped bolt welding process; The stress relief mechanism is arranged inside the flip relief mechanism and is used to perform stress relief processing on the L-shaped bolts after welding.

2. A flip welding device for fastener production and processing according to claim 1, characterized in that: The dynamic sealing mechanism comprises a basic sealing seat (12), a basic sealing seat (12) is fixedly connected to the middle and rear part of the top of the processing table (1), a sealing strip (20) is provided at the edge of the inner wall of the basic sealing seat (12), a sealing adjustment groove (5) is provided on the top of the processing table (1), a rotating sealing seat (7) is rotatably connected inside the sealing adjustment groove (5), and the outer wall of the rotating sealing seat (7) contacts the inner wall of the basic sealing seat (12), an opening (8) is provided in the middle of the front side of the rotating sealing seat (7), a side seat (11) is fixedly connected to the middle of the rear side of the top of the processing table (1), a transmission shaft (9) is rotatably connected to the middle of the front side of the bottom end of the side seat (11), and the bottom end of the transmission shaft (9) is connected to the middle of the top of the rotating sealing seat (7), a servo motor (10) is provided in the middle of the front side of the top of the side seat (11), and the output end of the servo motor (10) passes through the side seat (11) and is connected to the middle of the transmission shaft (9).

3. A flip welding device for fastener production and processing according to claim 2, characterized in that: The dynamic sealing mechanism also includes an argon flow channel (13), an argon flow channel (13) is provided in the middle and lower part of the side seat (11), and one end of the argon flow channel (13) is communicated with the interior of the basic sealing seat (12), and a guide connection nozzle (19) for connecting argon injection is provided on the end of the argon flow channel (13) away from the basic sealing seat (12), a reflux discharge channel (15) is provided in the middle and upper part of the side seat (11), and one end of the reflux discharge channel (15) is communicated with the interior of the basic sealing seat (12), and a gauze isolation plate (17) is provided in the middle of the end of the reflux discharge channel (15) away from the basic sealing seat (12).

4. A flip welding device for fastener production and processing according to claim 3, characterized in that: The dynamic sealing mechanism also includes a return pipe (18), which is provided at the middle of the front side of the side seat (11), and the two ends of the return pipe (18) are respectively connected to the interior of the argon flow channel (13) and the return discharge channel (15), and the return pipe (18) is provided with an electromagnetic control valve (14) for controlling the internal connection state of the argon flow channel (13) and the return discharge channel (15), and the top side of the return discharge channel (15) is provided with an electromagnetic control valve (16) for controlling the flow state of argon therein.

5. The flip welding device for fastener production and processing according to claim 1, characterized in that: The flip elimination mechanism comprises a mounting seat (24), a mounting seat (24) is provided on both sides of the middle portion of the top of the processing table (1), a mounting cavity (33) is provided in the middle and upper portion of the inner side of the mounting seat (24), an active rotating seat (32) is rotatably connected to one side of the inner side of the mounting cavity (33), a limiting ring seat (35) is provided in the middle portion of the outer wall of the active rotating seat (32), a supporting ring seat (25) is provided in the middle and upper portion of one side of the mounting seat (24), a mounting cylinder (34) is provided in the interior of the supporting ring seat (25), and one end of the mounting cylinder (34) extends into the mounting cavity (33).

6. A flip welding device for fastener production and processing according to claim 5, characterized in that: The flip elimination mechanism also includes an inner cavity (37), the inner cavity (37) is opened inside the mounting cylinder (34), a sealing piston seat (38) is provided inside the inner cavity (37), the inner middle part of the sealing piston seat (38) is rotatably connected to the driven rotating seat (36), and a limited fixed seat (29) is provided on the adjacent ends of the two mounting cylinders (34), and matching positioning grooves (30) that match the long arm and short arm of the L-shaped bolt are respectively provided on the surface of the adjacent side of the limited fixed seat (29), and a driving motor (26) is provided on the middle and upper part of one side of the outer wall of the mounting seat (24), and the The output end of the driving motor (26) passes through the mounting seat (24) and is connected to the middle of the corresponding active rotating seat (32) on the same side. The internal circumferential array of the active rotating seat (32) has multiple permanent magnets (40), and the N poles and S poles of the permanent magnets (40) are alternately arranged. A hollow cavity (43) is opened inside the driven rotating seat (36), and a ring winding (41) is arranged in the hollow cavity (43). An induction coil (42) is arranged on the ring winding (41). The middle of the driven rotating seat (36) on the same side is connected to the middle of the corresponding limit fixing seat (29) through a connecting rod (39).

7. The flip welding device for fastener production and processing according to claim 2, characterized in that: The adaptive flipping mechanism includes a top seat (21), a top seat (21) is provided at the middle of the top of the inner wall of the rotating sealing seat (7), an infrared thermal imager (22) is provided on one side of the middle of the top of the top seat (21), a high-speed visual camera (23) is provided on the other side of the middle of the top of the top seat (21), a PLC controller (6) is provided on one side of the middle front of the top of the processing table (1), and the PLC controller (6) is electrically connected to the driving motor (26).

8. The flip welding device for fastener production and processing according to claim 6, characterized in that: The stress relief mechanism includes a micro air pump (27), a micro air pump (27) is provided at the middle of the top of the mounting seat (24), a high-speed electromagnetic valve (28) is provided on the side of the top of the mounting cylinder (34) close to the support ring seat (25), and an electromagnetic exhaust valve (31) is provided on the side of the bottom of the mounting cylinder (34) close to the support ring seat (25). The exhaust end of the micro air pump (27) is connected to the air inlet of the high-speed electromagnetic valve (28) through the cooperation of the internal flow channel in the mounting seat (24) and the connecting pipe, and the exhaust port of the high-speed electromagnetic valve (28) is connected to the interior of the inner cavity (37).

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