Welding tool for wheelchair machining

Abstract

The invention relates to the technical field of welding equipment, and discloses a wheelchair machining welding tool which comprises a machining table, a linear rail is transversely arranged in the middle of the top end of the machining table, and a plurality of vertical rails are arranged on the two sides of the middle of the top end of the machining table at equal intervals. By adding and arranging the pre-welding treatment mechanism, before welding treatment is conducted on an arc-shaped upper beam of a backrest frame on a wheelchair, the mechanism conducts pre-welding pretreatment operation on a backrest frame beam needing to be welded, and according to the treatment mode, an anti-deformation cavity of a cooling shaping base can be matched with cooling liquid circulation; the arc-shaped part is heated through the outer convex seat, the heated arc-shaped part is rapidly cooled, stress is further released, the shape is fixed, structural distortion caused by stress concentration is prevented, a welding port is polished through the groove part of the outer convex seat, an arc transition groove is formed, follow-up welding operation is facilitated, the structural strength of a welding part can be enhanced, and a good premise is provided for high-quality welding.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, in particular to welding tooling for wheelchair processing. Background Art

[0002] Welding is a widely used connection method in manufacturing, but its technical requirements vary significantly depending on the product's characteristics. For static load-bearing products like ordinary shelves and mechanical supports, the welding process only needs to meet basic static load requirements—that is, the ability to stably support the preset weight without structural fracture. There are no strict requirements for dynamic fatigue strength, stress dispersion, and other indicators of the weld. In contrast, wheelchairs, as auxiliary mobility devices that directly support the human body, have completely different welding standards. In actual use, wheelchairs need to continuously bear the weight of the human body, and dynamic impact forces and alternating stresses are frequently generated during movement, turning, and going up and down hills. The top crossbeam of the wheelchair backrest frame is mostly curved. Its main function is to fit the curve of the upper edge of the back and improve the fit of the backrest support. During the welding process, its two ends need to be welded to the vertical columns on both sides of the backrest to form a complete backrest frame. This design method also requires that the welds of key components such as the seat frame, axle bracket, and folding hinge in the wheelchair not only meet extremely high tensile strength standards, but also need to avoid problems such as instantaneous stress concentration that may cause fractures at the welding position. Therefore, those skilled in the art have proposed a welding tool for wheelchair processing to solve the above-mentioned technical problems. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides welding tooling for wheelchair processing, which solves the problem that wheelchair structural parts cannot meet extremely high tensile strength standards using existing welding methods and the problem that instantaneous stress concentration causes fracture.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a welding tool for wheelchair processing, comprising: A processing table has a linear track horizontally opened in the middle of the top of the processing table, and multiple vertical tracks are evenly spaced on both sides of the middle of the top of the processing table; The linear track and multiple vertical tracks are used to provide position guidance for the linear moving module in each step of welding the curved upper beam of the wheelchair backrest frame; Electrical cabinets are installed on both sides of the middle of the front end of the processing table; The controller is located at the front end of the processing table and is used by the staff to control the operating status of the entire equipment during the welding process of the arc-shaped upper beam of the wheelchair back frame; The shaping elimination mechanism is arranged on both sides of the top of the processing table and is used to eliminate the residual stress inside the arc-shaped upper beam of the wheelchair backrest frame during the bending process and to shape it; A pre-welding treatment mechanism is provided on one side of the middle front portion of the top of the processing table and is used for pre-treating the arc-shaped upper beam of the wheelchair backrest frame before welding; The welding processing mechanism is arranged on one side of the middle rear part of the top of the processing table, and is used to perform welding processing on the arc-shaped material of the wheelchair backrest frame and the columns on both sides of the backrest after being processed by the pre-welding processing mechanism; The post-weld processing mechanism is arranged on one side of the middle rear part of the top of the processing table and is used for post-weld processing of the welded joints of the wheelchair structural parts after being processed by the welding processing mechanism.

[0005] Preferably, the eliminating shaping mechanism includes a linear moving module 2, a linear moving module 2 is provided on an inner side of the linear track, an upper part of one side of the linear moving module 2 is fixedly connected to a mounting base 1, a middle part of the mounting base 1 is rotatably connected to a rotating disk seat 1, an adjustable clamp 1 is provided in the middle of the rotating disk seat 1 for clamping and fixing the arc-shaped upper beam of the wheelchair backrest frame, and a rubber layer for increasing contact friction is provided on the inner side of the adjustable clamp 1, a driving motor 2 is provided on the middle upper part of the side of the linear moving module 2 away from the rotating disk seat 1, and the output end of the driving motor 2 passes through the linear moving module 2 and the mounting base 1 in sequence, and is connected to the middle part of the rotating disk seat 1.

[0006] Preferably, the eliminating shaping mechanism also includes a mounting seat, and a mounting seat is provided in the middle of the side of the top of the processing table away from the linear moving module 2, and a plurality of slots are equidistantly provided on the inner arc wall of the mounting seat, and a plurality of U-shaped rods are equidistantly fixedly connected to the inside of the mounting seat, and heating wires are provided on the U-shaped rods.

[0007] Preferably, the pre-welding treatment mechanism includes a linear moving module three, wherein a linear moving module three is arranged in one of the vertical tracks, a mounting base three is arranged in the middle and upper part of one side of the linear moving module three, a cooling and forming seat is arranged in the middle of the mounting base three, and an anti-deformation cavity matching the arc-shaped upper beam of the wheelchair back frame is opened on the surface of the cooling and forming seat, a coolant tank is arranged in the middle and lower part of the side of the linear moving module three away from the cooling and forming seat, and a cooling circulation pump is arranged at the bottom of one side of the linear moving module three, the cooling circulation pump draws and cools the coolant in the coolant tank through a connecting pipe and then injects it into the cooling and forming seat, the coolant in the cooling and forming seat eliminates stress and cools the arc-shaped upper beam of the wheelchair back frame after heating by heat absorption and conduction, and the coolant after heating in the cooling and forming seat returns to the coolant tank through the connecting pipe to be prepared for recycling again.

[0008] Preferably, the pre-welding processing mechanism includes a linear moving module 1, wherein a linear moving module 1 is arranged in one of the vertical tracks, and the middle upper part of the side of the linear moving module 1 close to the cooling and forming seat is fixedly connected to the mounting base 2, the middle part of the mounting base 2 is rotatably connected to the rotating disk seat 2, the middle part of the rotating disk seat 2 is fixedly connected to the outer convex seat, and the end of the outer convex seat away from the rotating disk seat 2 is provided with a groove portion, and the middle upper part of one side of the linear moving module 1 is provided with a driving motor 1, and the output end of the driving motor 1 passes through the linear moving module 1 and the mounting base 2 in sequence, and is connected to the middle part of the rotating disk seat 2.

[0009] Preferably, the welding processing mechanism includes a linear moving module four, wherein a linear moving module four is arranged in one of the vertical tracks, a mounting base four is fixedly connected to the middle upper part of one side of the linear moving module four, a rotating disk seat three is rotatably connected to the middle part of the mounting base four, an adjustable clamp two for clamping a fixed column is arranged in the middle part of the rotating disk seat three, and two automatic welding robotic arms are arranged in the middle and rear part of the top end of the processing table, and the two automatic welding robotic arms perform synchronous welding processing on both sides of the connection between the arc-shaped upper beam of the backrest frame and the column.

[0010] Preferably, the post-weld processing mechanism includes an arc rod, and arc rods are provided on the upper and lower sides of the middle part of the mounting base four, and a telescopic adjustment part for length adjustment is provided on the side of the arc rod close to the mounting base four, and a limiting ring is fixedly connected to the end of the arc rod away from the telescopic adjustment part, and a grinding sleeve is rotatably connected to the middle and front ends of the arc rod away from the outer wall of the mounting base four, and a driving motor three is provided on the middle and upper part of the side of the linear moving module four away from the mounting base four, and the output end of the driving motor three passes through the linear moving module four and the mounting base four in sequence, and is connected to the middle part of the rotating disk seat three.

[0011] Preferably, the post-weld processing mechanism also includes a sprayer, and a sprayer is provided at the middle of the top of one side of the mounting seat close to the linear moving module 2, and a delivery pressurizer is provided at the middle of the top of the mounting seat. The paint liquid outlet of the delivery pressurizer is connected to the liquid inlet of the sprayer through a connecting pipe. The sprayer atomizes the paint liquid and evenly sprays it on the welding position of the arc-shaped upper beam and the column of the wheelchair frame.

[0012] Working principle: When welding the arc-shaped crossbeam and column of the wheelchair backrest frame, first eliminate the starting of the forming mechanism, and the staff clamps and fixes one end of the backrest arc-shaped crossbeam through the adjustable clamp 1 on the rotating disc seat 1, and through the auxiliary cooperation of the inner rubber layer of the adjustable clamp 1, improve the clamping degree of the adjustable clamp on the backrest arc-shaped crossbeam. Then, after the backrest arc-shaped crossbeam is fixed, the staff controls the linear moving module 2 through the controller to drive the clamped and fixed backrest arc-shaped crossbeam to move to the position of the mounting seat in the linear track, so that the arc-shaped curved part of the backrest arc-shaped crossbeam enters the mounting seat. When the backrest arc-shaped crossbeam is fixed, the staff controls the linear moving module 2 through the controller to drive the clamped and fixed backrest arc-shaped crossbeam to move to the position of the mounting seat. When the arc-shaped curved part enters the mounting seat, the driving motor 2 on the linear moving module 2 is started, and the rotating shaft of the driving motor 2 drives the rotating disk seat 1 on the mounting base 1 and the curved crossbeam of the backrest clamped and fixed on the adjustable clamp 1 to rotate synchronously and slowly. At the same time, the heating wire on the U-shaped rod is energized and generates heat. The heat generated is conducted to the curved part of the backrest curved crossbeam through the slot to heat it up. The residual stress inside the material during the bending and molding process of the wheelchair frame backrest curved crossbeam is eliminated by heating, thereby completing the stress elimination treatment of the wheelchair frame backrest curved crossbeam before welding.Then the pre-welding treatment mechanism is started. After the arc-shaped crossbeam of the frame backrest has been processed by the elimination and shaping mechanism, the staff controls the linear moving module 2 to move on the linear track through the controller on the processing table, so that the linear track moves to a position near the linear moving module 3. Then the drive motor 2 on the linear moving module 2 is started. The rotating shaft of the drive motor 2 drives the rotating disk seat 1 on the mounting base 1 and the frame backrest arc-shaped crossbeam that has been heated and heated on the adjustable clamp 1 to adjust the angle, so that it is consistent with the angle of the anti-deformation cavity on the cooling and shaping seat. After that, the staff controls the linear moving module 3 in the vertical track to move forward through the controller, so that the adjustment The curved part of the curved crossbeam of the frame backrest fixed on the clamp enters the anti-deformation cavity and fits with its inner wall. Since the curved part of the curved crossbeam of the frame backrest is in a high-temperature state at this time, the coolant in the cooling and forming seat absorbs the heat conducted from the curved crossbeam of the frame backrest in the anti-deformation cavity and increases its temperature. At the same time, the temperature of the curved crossbeam of the frame backrest is reduced and the stress in its material is released. At the same time, the anti-deformation cavity limits its shape and prevents deformation caused by stress concentration release. At this time, the cooling circulation pump on the linear moving module three is started synchronously. When the cooling circulation pump is started, the coolant in the coolant tank on the linear moving module three is cooled through the connecting pipe and then transported to the cooling and forming seat. The seat is used to absorb heat, and then the cooling liquid after absorbing heat and heating in the seat is returned to the coolant tank through the connecting pipe to complete a cooling cycle. When the frame backrest arc beam on the adjustable clamp is stress-relieved and cooled and shaped, the linear moving module three is reset, and then the drive motor two on the linear moving module two is started. The shaft of the drive motor two rotates while driving the rotating disk seat one on the mounting base one and the frame backrest arc beam on the adjustable clamp one after stress-relieved and cooled and shaped to adjust the angle, so that the welding port position of the frame backrest arc beam is toward the position of the linear moving module one. Then the staff controls the vertical track through the controller The linear moving module 1 moves, so that the outer convex seat contacts the welding port position of the frame backrest arc-shaped crossbeam, and then the driving motor 1 on the linear moving module 1 is started, and the rotating shaft of the driving motor 1 drives the rotating disc seat 2 on the mounting base 2 to rotate synchronously while rotating, and the rotating disc seat 2 drives the outer convex seat thereon to rotate synchronously while rotating, and the outer convex seat grinds the inner wall position of the welding port of the frame backrest arc-shaped crossbeam through the groove portion on its end portion to form an arc transition groove, thereby facilitating the subsequent welding process of the frame backrest arc-shaped crossbeam, and also improving the structural strength of the welding position after welding, thereby completing the pretreatment operation of the wheelchair frame backrest arc-shaped crossbeam before welding;Then the welding processing mechanism is started. After the pre-welding processing mechanism pre-processes the frame backrest curved crossbeam before welding, the linear moving module 1 in the vertical track is reset. Then the staff controls the linear moving module 2 in the linear track to move through the controller, so that the adjustable clamp 1 on the linear moving module 2 clamps the fixed frame backrest curved crossbeam and moves it to a position near the linear moving module 4. Then the staff fixes the vertical rod to be welded with the frame backrest curved crossbeam on the rotating disc seat 3 through the adjustable clamp 2. After the adjustable clamp 2 fixes the vertical rod to be welded, the staff controls the linear moving module 4 in the vertical track to move forward through the controller, so that the end of the vertical rod contacts the position where the arc transition groove is polished on the frame backrest curved crossbeam. After that, the two automatic welding robots on the processing table automatically weld the two sides of the connection between the frame backrest curved crossbeam and the vertical rod, thereby completing the welding process of the frame backrest curved crossbeam and the vertical rod.Finally, the post-weld processing mechanism is started. After the welding of the connection between the frame backrest arc beam and the vertical pole is completed, the welded product is left to cool and set for a period of time. After it is set, the staff releases the adjustable clamp 1 to fix one end of the welded product, and then controls the linear moving module 2 to reset in the vertical track through the controller. Then, the staff adjusts the telescopic adjustment part on the arc rod to the corresponding length according to the welding position of the product after welding, so that the grinding sleeve on the arc rod is in the middle position of the welding position after adjustment, and the grinding sleeve is in contact with the protruding excess height of the welding position, and then the linear moving module 4 is adjusted. The driving motor three is started, and the rotating shaft of the driving motor three drives the rotating disc seat three on the mounting base four to rotate synchronously while rotating. The rotating disc seat three drives the adjustable clamper two thereon and the welded product clamped and fixed thereon to rotate synchronously while rotating. When the rotating disc seat three and the welding product on the adjustable clamper two thereon rotate, the protruding excess height of the weld seam part contacts the grinding sleeve on the arc rod and drives the grinding sleeve to rotate synchronously through friction, thereby grinding the protruding excess height at the weld seam position of the welding product to a height that is flush with the outer surface of the rest of the welding product, so as to avoid the weld excess height being frequently affected during the subsequent use of the wheelchair. The dynamic impact force and alternating stress generated by the fracture problem, the staff then controls the linear moving module 2 in the linear track to move to the vicinity of the linear moving module 4 through the controller, and then the staff releases the welding product clamped on the adjustable clamp 2 and fixes the other end again through the adjustable clamp 1 on the linear moving module 2, and then the staff controls the linear moving module 4 in the vertical track to reset through the controller, and then the staff controls the linear moving module 2 and the welding product fixed by the adjustable clamp 1 thereon to move to the bottom of the sprayer through the controller, and then the delivery pressurizer on the sprayer is After starting, the paint liquid is transported to the sprayer through the connecting pipe and the paint liquid is atomized and sprayed onto the surface of the welding position. At the same time, the driving motor 2 on the linear moving module 2 drives the rotating disc seat 1, the adjustable clamp 1 and the welding product thereon to rotate slowly, thereby ensuring the uniformity of the paint spraying. Finally, the product after the paint spraying treatment is transported from the paint spraying position to the inside of the mounting seat through the linear moving module 2, and the paint repair position is evenly dried by the heating wire on the U-shaped rod. At the same time, the product is synchronously rotated with the driving motor 2 on the linear moving module 2, thereby ensuring the uniformity of the paint spraying and drying at the welding position, thereby completing the processing of the product after welding;After the paint spraying and drying of the welded product surface is completed, it is left to cool. After the cooling is complete, the staff controls the linear motion module 2 to reset within the linear track through the controller. The staff then removes the welded product from the adjustable clamp 1 and reinstalls the new backrest frame crossbeam structure to ensure the normal progress of subsequent processing.

[0013] The present invention provides a welding tool for wheelchair processing, which has the following beneficial effects: 1. The present invention adds and sets a shaping elimination mechanism. Before welding the curved upper beam of the wheelchair backrest frame, the mechanism, on the one hand, can stably clamp the curved cross beam of the backrest through an adjustable clamp and a rubber layer to avoid loosening or displacement during processing, laying a solid foundation for subsequent processing. On the other hand, the mechanism uses uniform heating to heat the curved part of the frame beam. This treatment can not only evenly eliminate the residual stress from the bending process, but also assist in shaping with the help of the curved structure of the mounting seat, reducing the deformation of the curved part caused by stress release, and ensuring the accuracy of the curved structure on the frame beam before welding.

[0014] 2. The present invention adds and sets a pre-welding treatment mechanism. Before welding the arc-shaped upper beam of the backrest frame on the wheelchair, the mechanism performs pre-welding pretreatment operations on the backrest frame beam to be welded. This treatment method can not only quickly cool the heated arc-shaped part through the anti-deformation cavity of the cooling forming seat and the circulation of coolant, further release stress and fix the shape, and prevent structural distortion caused by stress concentration, but also grind the welding port through the groove part of the outer convex seat to form an arc transition groove, which not only facilitates subsequent welding operations, but also enhances the structural strength of the welding part, providing a good premise for high-quality welding.

[0015] 3. The present invention adds and sets a welding processing mechanism. When welding the curved upper beam and the upright post of the wheelchair backrest frame, first, the mechanism can firmly fix the upright post through the adjustable clamp 2, and combined with the precise movement of the linear moving module, ensure the docking accuracy of the upright post and the curved upper beam, and avoid affecting the welding quality due to misalignment. Secondly, two automatic welding robotic arms simultaneously weld both sides of the connection, which can ensure that the weld is uniform and full, improve the tensile strength of the welding part, and meet the use requirements of the wheelchair in dynamic force scenarios.

[0016] 4. The present invention adds and sets a post-weld processing mechanism. After welding the arc-shaped upper beam and the vertical pole of the wheelchair backrest frame, on the one hand, the mechanism grinds the weld excess height through a telescopically adjustable grinding sleeve to make it flat and consistent with the component surface, avoiding stress concentration caused by excess height and reducing the risk of breakage during use. On the other hand, the sprayer evenly sprays paint on the welding part and dries it, which can effectively prevent weld rust, extend the service life of the wheelchair, and improve the aesthetics of the welding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a schematic diagram of the rear structure of the present invention; Figure 3 This is a partial structural diagram of the second linear motion module of the present invention; Figure 4 It is a cross-sectional schematic diagram of the internal structure of the mounting base of the present invention; Figure 5 Schematic diagram of three partial structures of the linear motion module of the present invention; Figure 6 This is a partial structural diagram of a linear motion module of the present invention; Figure 7 Schematic diagram of the four partial structures of the linear motion module of the present invention; Figure 8 It is a schematic diagram of the local structure of the arc rod of the present invention.

[0018] Among them, 1. Processing table; 2. Linear motion module 1; 3. Drive motor 1; 4. Linear motion module 2; 5. Controller; 6. Adjustable clamp 1; 7. Linear rail; 8. Linear motion module 3; 9. Automatic welding robot arm; 10. Linear motion module 4; 11. Conveying pressurizer; 12. Slot; 13. Mounting base; 14. Electrical cabinet; 15. Vertical rail; 16. Mounting base 1; 17. Sprayer; 18. Arc rod; 19. Outer convex seat; 20. Mounting Base 2; 21. Drive motor 2; 22. Coolant tank; 23. Drive motor 3; 24. Rubber layer; 25. Rotating disc seat 1; 26. U-shaped rod; 27. Heating wire; 28. Mounting base 3; 29. ​​Cooling and shaping seat; 30. Anti-deformation cavity; 31. Cooling circulation pump; 32. Bevel portion; 33. Telescopic adjustment portion; 34. Grinding sleeve; 35. Adjustable clamp 2; 36. Rotating disc seat 2; 37. Mounting base 4; 38. Rotating disc seat 3; 39. Limiting ring. DETAILED DESCRIPTION

[0019] 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.

[0020] Please see the attached Figure 1 - Attachment Figure 2 The embodiment of the present invention provides a welding tool for wheelchair processing, comprising a processing table 1, a linear track 7 is horizontally opened in the middle of the top of the processing table 1, and a plurality of vertical tracks 15 are equidistantly opened on both sides of the middle of the top of the processing table 1; the linear track 7 and the plurality of vertical tracks 15 are respectively used to provide position guidance for a linear moving module in each step of welding the curved upper beam of the wheelchair back frame; electrical cabinets 14 are provided on both sides of the middle of the front end of the processing table 1; a controller 5 is provided on one side of the front end of the processing table 1, and is used by a staff to control the operating status of the entire equipment during the welding process of the curved upper beam of the wheelchair back frame; The overall processing table 1 takes the position of the controller 5 as the front, and the orientation description of the overall equipment is based on facing the processing table 1 and the controller 5. The top of the processing table 1 near the front edge of the processing table 1 is defined as the middle front part, such as the linear motion module 1 2 on the processing table 1. Conversely, the top of the processing table 1 near the rear edge of the processing table 1 is defined as the middle rear part, such as the linear motion module 3 8 on the processing table 1. The overall processing table 1 takes the automatic welding robot arm 9 between the linear motion module 3 8 and the linear motion module 4 10 as the middle part, and the two sides of the automatic welding robot arm 9 between the linear motion module 3 8 and the linear motion module 4 10 are the left and right sides of the processing table 1.

[0021] Please see the attached Figure 3 - Attachment Figure 4 , eliminating the shaping mechanism, which is arranged on both sides of the top of the processing table 1, and is used to eliminate the residual stress inside the arc-shaped upper beam of the wheelchair backrest frame during the bending process and to perform shaping treatment on it; The eliminating shaping mechanism includes a linear moving module 24, and a linear moving module 24 is provided on one side of the inner side of the linear track 7. The upper part of one side of the linear moving module 24 is fixedly connected to the mounting base 16, and the middle part of the mounting base 16 is rotatably connected to the rotating disk seat 125. The middle part of the rotating disk seat 25 is provided with an adjustable clamp 16 for clamping and fixing the arc-shaped upper beam of the wheelchair backrest frame, and the inner side of the adjustable clamp 16 is provided with a rubber layer 24 for increasing the contact friction force. A drive motor 21 is provided on the middle and upper part of the side of the linear moving module 24 away from the rotating disk seat 125, and the output end of the drive motor 21 passes through the linear moving module 24 and the mounting base 16 in sequence, and is connected to the middle part of the rotating disk seat 125.

[0022] The shaping mechanism is started, and the staff clamps and fixes one end of the backrest curved crossbeam through the adjustable clamper 6 on the rotating disc seat 25, and with the assistance of the rubber layer 24 inside the adjustable clamper 6, the clamping degree of the backrest curved crossbeam by the adjustable clamper 6 is improved. Then, after the backrest curved crossbeam is fixed, the staff controls the linear moving module 2 4 through the controller 5 to drive the clamped backrest curved crossbeam to move to the position of the mounting seat 13 in the linear track 7, so that the arc-shaped curved part of the backrest curved crossbeam enters the mounting seat 13.

[0023] The eliminating shaping mechanism also includes a mounting seat 13. The mounting seat 13 is provided in the middle of the side of the top of the processing table 1 away from the linear moving module 2 4. A plurality of slots 12 are equidistantly provided on the inner curved wall of the mounting seat 13. A plurality of U-shaped rods 26 are fixedly connected equidistantly inside the mounting seat 13, and a heating wire 27 is provided on each of the U-shaped rods 26.

[0024] When the curved portion of the curved crossbeam of the backrest enters the mounting seat 13, the driving motor 21 on the linear moving module 24 is started, and the rotating shaft of the driving motor 21 drives the rotating disk seat 125 on the mounting base 16 and the curved crossbeam of the backrest clamped and fixed on the adjustable clamp 16 to rotate synchronously and slowly. At the same time, the heating wire 27 on the U-shaped rod 26 is energized and generates heat. The heat generated is conducted to the curved portion of the curved crossbeam of the backrest through the slot 12 to heat it up. The residual stress inside the material during the bending and molding process of the curved crossbeam of the wheelchair frame backrest is eliminated by heating, thereby completing the stress elimination treatment of the curved crossbeam of the wheelchair frame backrest before welding.

[0025] Please see the attached Figure 5 - Attachment Figure 6 , a pre-welding treatment mechanism, which is arranged on one side of the middle front portion of the top of the processing table 1, and is used for pre-treating the arc-shaped upper beam of the wheelchair backrest frame for welding processing; The pre-welding processing mechanism includes a linear moving module 3 8, in which a linear moving module 3 8 is arranged in one vertical track 15, a mounting base 3 28 is arranged in the middle and upper part of one side of the linear moving module 3 8, and a cooling and shaping seat 29 is arranged in the middle of the mounting base 3 28. The surface of the cooling and shaping seat 29 is provided with an anti-deformation cavity 30 that matches the arc-shaped upper beam of the wheelchair back frame. A coolant tank 22 is arranged in the middle and lower part of the side of the linear moving module 3 8 away from the cooling and shaping seat 29, and a cooling circulation pump 31 is arranged at the bottom of one side of the linear moving module 3 8. The cooling circulation pump 31 pumps and cools the coolant in the coolant tank 22 through a connecting pipe and then injects it into the cooling and shaping seat 29. The coolant in the cooling and shaping seat 29 eliminates stress and cools the arc-shaped upper beam of the wheelchair back frame after heating by heat absorption and conduction. The coolant after heating in the cooling and shaping seat 29 returns to the coolant tank 22 through the connecting pipe to be prepared for recycling again.

[0026] When the pre-welding treatment mechanism is started, after the arc-shaped crossbeam of the frame backrest has been processed by the elimination and shaping mechanism, the staff controls the linear motion module 2 4 to move on the linear track 7 through the controller 5 on the processing table 1, so that the linear track 7 moves to a position near the linear motion module 3 8, and then the drive motor 2 21 on the linear motion module 2 4 is started. The rotating shaft of the drive motor 21 rotates while driving the rotating disk seat 1 25 on the mounting base 16 and the frame backrest arc-shaped crossbeam on the adjustable clamp 1 6 after the heating and temperature rising treatment to adjust the angle, so that it is consistent with the angle of the anti-deformation cavity 30 on the cooling and shaping seat 29.

[0027] Afterwards, the staff controls the linear moving module 3 8 in the vertical track 15 through the controller 5 to move forward, so that the curved portion of the frame backrest arc beam fixed on the adjustable clamp 1 6 enters the anti-deformation cavity 30 and fits with its inner wall. Since the curved portion of the frame backrest arc beam is in a high-temperature state at this time, the coolant in the cooling and shaping seat 29 absorbs the heat conducted from the frame backrest arc beam in the anti-deformation cavity 30 to increase the temperature.

[0028] At the same time, the temperature of the arc-shaped crossbeam of the frame backrest is reduced while the stress in its material is released, and the anti-deformation cavity 30 limits its shape and prevents deformation caused by stress concentration release. At this time, the cooling circulation pump 31 on the linear moving module three 8 is started synchronously. When the cooling circulation pump 31 is started, the coolant in the coolant tank 22 on the linear moving module three 8 is cooled through the connecting pipe and then transported into the cooling and forming seat 29 for heat absorption. Then, the coolant that has absorbed heat and heated up in the cooling and forming seat 29 is returned to the coolant tank 22 through the connecting pipe, thereby completing a cooling cycle.

[0029] Please see the attached Figure 1 - Attachment Figure 2 and attached Figure 7 The pre-welding processing mechanism includes a linear moving module 2, in which a linear moving module 2 is arranged in one vertical track 15, and a mounting base 20 is fixedly connected to the middle upper part of one side of the linear moving module 2 close to the cooling and forming seat 29, and a rotating disk seat 2 36 is rotatably connected to the middle part of the mounting base 20, and an outer boss 19 is fixedly connected to the middle part of the rotating disk seat 2 36, and a groove portion 32 is provided on the end of the outer boss 19 away from the rotating disk seat 2 36, and a driving motor 3 is provided in the middle upper part of one side of the linear moving module 2, and the output end of the driving motor 3 passes through the linear moving module 2 and the mounting base 20 in sequence, and is connected to the middle part of the rotating disk seat 2 36.

[0030] After the arc-shaped cross beam of the frame backrest on the adjustable clamp 16 is subjected to stress relief and cooling and shaping treatment, the linear moving module 3 8 is reset, and then the driving motor 21 on the linear moving module 2 4 is started. The rotating shaft of the driving motor 21 drives the rotating disk seat 1 25 on the mounting base 16 and the arc-shaped cross beam of the frame backrest on the adjustable clamp 16 after stress relief and cooling and shaping treatment to adjust the angle, so that the welding port position of the arc-shaped cross beam of the frame backrest is toward the position of the linear moving module 1 2. Then the staff controls the linear moving module 1 2 in the vertical track 15 to move through the controller 5, so that the outer protrusion 19 is in contact with the welding port position of the arc-shaped cross beam of the frame backrest.

[0031] Then the driving motor 13 on the linear moving module 12 is started, and the rotating shaft of the driving motor 13 drives the rotating disc seat 2 36 on the mounting base 2 20 to rotate synchronously while rotating, and the rotating disc seat 2 36 drives the outer boss 19 thereon to rotate synchronously while rotating, and the outer boss 19 grinds the inner wall position of the welding port of the frame backrest arc beam through the groove portion 32 on its end to form an arc transition groove, thereby facilitating the subsequent welding process of the frame backrest arc beam, and also improving the structural strength of the welding position after welding, thereby completing the pretreatment work of the wheelchair frame backrest arc beam before welding.

[0032] Please see the attached Figure 7 - Attachment Figure 8 , a welding processing mechanism, which is arranged on one side of the middle rear portion of the top of the processing table 1, and is used to perform welding processing on the arc-shaped material of the wheelchair backrest frame and the columns on both sides of the backrest after being processed by the pre-welding processing mechanism; The welding processing mechanism includes a linear moving module four 10, in which the linear moving module four 10 is arranged in one vertical track 15, and a mounting base four 37 is fixedly connected to the middle upper part of one side of the linear moving module four 10, and a rotating disk seat three 38 is rotatably connected to the middle part of the mounting base four 37. An adjustable clamper two 35 for clamping a fixed column is provided in the middle part of the rotating disk seat three 38. Two automatic welding robot arms 9 are provided in the middle and rear part of the top of the processing table 1. The two automatic welding robot arms 9 perform synchronous welding processing on both sides of the connection between the arc-shaped upper beam of the backrest frame and the column.

[0033] The welding processing mechanism is started. After the pre-welding processing mechanism pre-processes the frame backrest arc-shaped crossbeam before welding, the linear moving module 1 2 in the vertical track 15 is reset. Then the staff controls the linear moving module 2 4 in the linear track 7 through the controller 5 to move, so that the frame backrest arc-shaped crossbeam clamped and fixed by the adjustable clamp 1 6 on the linear moving module 2 4 moves to a position near the linear moving module 4 10.

[0034] Then the staff fixes the vertical pole to be welded with the frame backrest arc-shaped crossbeam on the rotating disc seat three 38 through the adjustable clamp two 35. After the adjustable clamp two 35 fixes the vertical pole to be welded, the staff controls the linear moving module four 10 in the vertical track 15 to move forward through the controller 5, so that the end of the vertical pole contacts the position where the arc transition groove of the frame backrest arc-shaped crossbeam is polished. After that, the two automatic welding robot arms 9 on the processing table 1 automatically weld the two sides of the connection between the frame backrest arc-shaped crossbeam and the vertical pole respectively, thereby completing the welding process of the frame backrest arc-shaped crossbeam and the vertical pole.

[0035] The post-weld processing mechanism is arranged at one side of the middle rear portion of the top end of the processing table 1 and is used for post-weld processing of the welded joints of the wheelchair structural parts after being processed by the welding processing mechanism.

[0036] The post-weld processing mechanism includes an arc rod 18, and the arc rod 18 is provided on the upper and lower sides of the middle part of the mounting base four 37. The arc rod 18 is provided with a telescopic adjustment part 33 for length adjustment on the side close to the mounting base four 37. The end of the arc rod 18 away from the telescopic adjustment part 33 is fixedly connected to the limit ring 39, and the middle and front ends of the arc rod 18 away from the outer wall of the mounting base four 37 are rotatably connected with a grinding sleeve 34. The middle and upper part of the side of the linear moving module four 10 away from the mounting base four 37 is provided with a drive motor three 23. The output end of the drive motor three 23 passes through the linear moving module four 10 and the mounting base four 37 in sequence, and is connected to the middle part of the rotating disk seat three 38.

[0037] When the post-weld processing mechanism is started, after the welding of the connection between the frame backrest arc beam and the vertical pole is completed, the welded product is left to cool and set for a period of time. After it is set, the staff releases the adjustable clamp 6 that fixes one end of the welded product, and then controls the linear moving module 2 4 to reset in the vertical track 15 through the controller 5.

[0038] Then, the staff adjusts the telescopic adjustment part 33 on the arc rod 18 to the corresponding length according to the welding position of the product after welding, so that the grinding sleeve 34 on the arc rod 18 is in the middle position of the welding position after adjustment, and the grinding sleeve 34 is in contact with the protruding excess height of the welding position. Then, the driving motor 3 23 on the linear moving module 4 10 is started, and the rotating shaft of the driving motor 3 23 drives the rotating disk seat 3 38 on the mounting base 4 37 to rotate synchronously while rotating, and the rotating disk seat 3 38 drives the adjustment part 38 on it to rotate synchronously while rotating. The second clamp 35 and the welded product clamped and fixed by it rotate synchronously. When the rotating disc seat 38 and the welded product on the adjustable clamp 2 35 thereon rotate, the protruding height of the weld part contacts the grinding sleeve 34 on the arc rod 18 and drives the grinding sleeve 34 to rotate synchronously through friction, so that the protruding height at the weld position of the weld product is polished to a height that is flush with the outer surface of the rest of the weld product, so as to avoid the problem of fracture caused by the frequent dynamic impact force and alternating stress of the weld height during the subsequent use of the wheelchair.

[0039] The telescopic adjustment part 33 on the arc rod 18 can be retracted when not in use, thereby shortening the length of the entire arc rod 18 and preventing the arc rod 18 from affecting the welding process. When in use, it can be extended to extend the length of the entire arc rod 18. At the same time, the grinding sleeve 34 on it can be moved to different positions of the welding product for surface treatment, thereby improving the adaptability of the overall equipment during use.

[0040] The post-weld processing mechanism also includes a sprayer 17. The sprayer 17 is provided at the middle of the top of the mounting seat 13 close to the linear movable module 2 4. The delivery pressurizer 11 is provided at the middle of the top of the mounting seat 13. The paint liquid outlet of the delivery pressurizer 11 is connected to the liquid inlet of the sprayer 17 through a connecting pipe. The sprayer 17 atomizes the paint liquid and evenly sprays it on the welding position of the arc-shaped upper beam and the column of the wheelchair frame.

[0041] Afterwards, the staff controls the linear moving module 2 4 in the linear track 7 to move to a position near the linear moving module 4 10 through the controller 5, and then the staff releases the welding product clamped and fixed on the adjustable clamp 2 35, and fixes its other end again through the adjustable clamp 1 6 on the linear moving module 2 4, and then the staff controls the linear moving module 4 10 in the vertical track 15 through the controller 5 to reset, and then the staff controls the linear moving module 2 4 and the welding product fixed by the adjustable clamp 1 6 thereon to move to the lower part of the sprayer 17 through the controller 5, and then the conveying pressurizer 11 on the sprayer 17 is started, which conveys the paint liquid to the sprayer 17 through the connecting pipe and atomizes the paint liquid and sprays it onto the surface of the welding position, and at the same time, the driving motor 2 21 on the linear moving module 2 4 drives the rotating disc seat 1 25, the adjustable clamp 1 6 and the welding product thereon to rotate slowly, thereby ensuring the uniformity of the paint spraying.

[0042] Finally, the product after painting is transported to the inside of the mounting seat 13 by the linear moving module 2 4 at the painting position, and the painting repair position is evenly dried by the heating wire 27 on the U-shaped rod 26. At the same time, the product is rotated synchronously with the driving motor 21 on the linear moving module 2 4 to ensure the uniformity of the painting drying at the welding position, thereby completing the processing of the product after welding.

[0043] 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. Welding tool for wheelchair processing, characterized in that: include, A processing table (1), wherein a linear track (7) is horizontally provided in the middle of the top of the processing table (1), and a plurality of vertical tracks (15) are equidistantly provided on both sides of the middle of the top of the processing table (1); The linear track (7) and the plurality of vertical tracks (15) are respectively used to provide position guidance for the linear moving module in each step of welding the arc-shaped upper beam of the wheelchair backrest frame; Electrical cabinets (14) are provided on both sides of the middle portion of the front end of the processing table (1); A controller (5) is provided at the front end of the processing table (1) and is used by a worker to control the operating state of the entire device during the arc-shaped upper beam welding processing of the wheelchair backrest frame; A shaping elimination mechanism is provided on both sides of the top of the processing table (1) and is used to eliminate the residual stress inside the arc-shaped upper beam of the wheelchair backrest frame during the bending process and to perform shaping treatment on it; A pre-welding treatment mechanism, which is arranged on one side of the middle front portion of the top of the processing table (1) and is used for pre-treating the arc-shaped upper beam of the wheelchair backrest frame for welding processing; A welding processing mechanism is provided on one side of the middle rear portion of the top of the processing table (1) and is used for welding the arc-shaped material of the wheelchair backrest frame and the columns on both sides of the backrest after being processed by the pre-welding processing mechanism; The post-weld processing mechanism is arranged on one side of the middle rear portion of the top end of the processing table (1) and is used for post-weld processing of the welded joints of the wheelchair structural parts after being processed by the welding processing mechanism.

2. The wheelchair processing welding tool according to claim 1, characterized in that: The elimination shaping mechanism includes a linear moving module 2 (4), a linear moving module 2 (4) is provided on one side of the inner portion of the linear track (7), an upper portion of one side of the linear moving module 2 (4) is fixedly connected to a mounting base 1 (16), a middle portion of the mounting base 1 (16) is rotatably connected to a rotating disk seat 1 (25), an adjustable clamp 1 (6) for clamping and fixing the arc-shaped upper beam of the wheelchair backrest frame is provided in the middle portion of the rotating disk seat 1 (25), and a rubber layer (24) for increasing contact friction is provided on the inner side of the adjustable clamp 1 (6), a driving motor 2 (21) is provided on the middle upper portion of a side of the linear moving module 2 (4) away from the rotating disk seat 1 (25), and an output end of the driving motor 2 (21) passes through the linear moving module 2 (4) and the mounting base 1 (16) in sequence, and is connected to the middle portion of the rotating disk seat 1 (25).

3. The wheelchair processing welding tool according to claim 2, characterized in that: The elimination shaping mechanism further comprises a mounting seat (13), a mounting seat (13) being provided at the middle of a side of the top end of the processing table (1) away from the second linear moving module (4), a plurality of slots (12) being equidistantly provided on an inner arc-shaped wall of the mounting seat (13), a plurality of U-shaped rods (26) being equidistantly fixedly connected inside the mounting seat (13), and a heating wire (27) being provided on each of the U-shaped rods (26).

4. The wheelchair processing welding tool according to claim 1, characterized in that: The pre-welding treatment mechanism includes a linear moving module three (8), wherein a linear moving module three (8) is provided in one of the vertical tracks (15), a mounting base three (28) is provided in the middle and upper part of one side of the linear moving module three (8), a cooling and shaping seat (29) is provided in the middle of the mounting base three (28), an anti-deformation cavity (30) matching the arc-shaped upper beam of the wheelchair backrest frame is provided on the surface of the cooling and shaping seat (29), and a cooling and shaping seat (30) is provided in the middle and lower part of the side of the linear moving module three (8) away from the cooling and shaping seat (29). The liquid tank (22) is provided with a cooling circulation pump (31) at the bottom of one side of the linear moving module three (8). The cooling circulation pump (31) pumps the coolant in the coolant tank (22) through the connecting pipe, cools it, and then injects it into the cooling and shaping seat (29). The coolant in the cooling and shaping seat (29) eliminates stress and cools the arc-shaped upper beam of the wheelchair backrest frame after heating by heat conduction. The coolant after heating in the cooling and shaping seat (29) returns to the coolant tank (22) through the connecting pipe to be recycled again.

5. The wheelchair processing welding tool according to claim 4, characterized in that: The pre-welding treatment mechanism includes a linear moving module (2), wherein a linear moving module (2) is provided in one of the vertical tracks (15), and a mounting base (20) is fixedly connected to the middle upper part of the side of the linear moving module (2) close to the cooling and forming seat (29), and a rotating disk seat (36) is rotatably connected to the middle part of the mounting base (20), and an outer convex seat (19) is fixedly connected to the middle part of the rotating disk seat (36), and a groove portion (32) is provided on the end of the outer convex seat (19) away from the rotating disk seat (36), and a driving motor (3) is provided in the middle upper part of one side of the linear moving module (2), and the output end of the driving motor (3) passes through the linear moving module (2) and the mounting base (20) in sequence, and is connected to the middle part of the rotating disk seat (36).

6. The wheelchair processing welding tool according to claim 1, characterized in that: The welding processing mechanism includes a linear moving module four (10), wherein the linear moving module four (10) is arranged in one of the vertical tracks (15), a mounting base four (37) is fixedly connected to the middle upper part of one side of the linear moving module four (10), a rotating disk seat three (38) is rotatably connected to the middle part of the mounting base four (37), and an adjustable clamper two (35) for clamping a fixed column is arranged in the middle part of the rotating disk seat three (38), and two automatic welding robot arms (9) are arranged in the middle rear part of the top of the processing table (1), and the two automatic welding robot arms (9) perform synchronous welding processing on both sides of the connection between the arc-shaped upper beam of the backrest frame and the column.

7. The wheelchair processing welding tool according to claim 6, characterized in that: The post-weld processing mechanism includes an arc rod (18), and the upper and lower sides of the middle part of the mounting base four (37) are both provided with arc rods (18), and a telescopic adjustment part (33) for length adjustment is provided on the side of the arc rod (18) close to the mounting base four (37), and a limiting ring (39) is fixedly connected to the end of the arc rod (18) away from the telescopic adjustment part (33), and a grinding sleeve (34) is rotatably connected to the middle and front ends of the arc rod (18) away from the outer wall of the mounting base four (37), and a driving motor three (23) is provided on the middle and upper part of the side of the linear moving module four (10) away from the mounting base four (37), and the output end of the driving motor three (23) passes through the linear moving module four (10) and the mounting base four (37) in sequence, and is connected to the middle part of the rotating disk seat three (38).

8. The wheelchair processing welding tool according to claim 3, characterized in that: The post-weld processing mechanism further includes a sprayer (17), and the sprayer (17) is provided at the middle of the top end of the mounting seat (13) close to the linear moving module 2 (4), and the delivery pressurizer (11) is provided at the middle of the top end of the mounting seat (13), and the paint liquid outlet of the delivery pressurizer (11) is connected to the liquid inlet of the sprayer (17) through a connecting pipe, and the sprayer (17) atomizes the paint liquid and evenly sprays it on the welding position of the arc-shaped upper beam and the column of the wheelchair frame.

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