A barrel of welding wire rotary mechanism

Abstract

This invention discloses a drum-type welding wire rotary mechanism, belonging to the field of automatic welding technology. It includes a rotary table rotatably connected to a frame, a drive device installed within the frame to drive the rotary table's rotation, a tension sensor installed at the wire feeding mechanism, and a control unit. The control unit controls the rotation speed of the drive device based on the signal from the tension sensor, thereby controlling the rotation speed of the drum. In use, the drive device drives the rotary table to rotate, which in turn drives the drum to rotate, actively releasing the welding wire. The wire feeding mechanism continuously feeds the welding wire from the drum into the welding torch, achieving continuous welding. The tension sensor continuously senses the tension of the welding wire. When the tension increases, the control unit, based on the signal from the tension sensor, controls the drive device to increase its rotation speed to reduce the wire tension. When the tension data measured by the tension sensor is within the normal range, the control unit controls the drive device to maintain its original speed.

Description

Technical Field

[0001] This invention belongs to the field of automatic welding technology, and in particular relates to a rotary mechanism for barrel-type welding wire. Background Technology

[0002] Barrel-packaged welding wire is widely used in automated welding processes. A typical barrel-packaged welding wire consists of a cylindrical barrel, a core coaxially fixed to the bottom wall of the barrel, and coiled welding wire arranged in a ring within the annular cavity between the core and the barrel. During actual welding operations, a wire feeding mechanism continuously pulls the welding wire out to work with the welding torch to complete continuous welding processes.

[0003] Currently, in conventional barrel-type welding wire feeding operations in the industry, the welding wire barrel is generally installed in a fixed and static manner. The welding wire is passively extracted from the annular cavity between the barrel core and the barrel body by relying solely on the continuous traction force applied by the external wire feeding mechanism to maintain continuous welding operations of the welding gun.

[0004] When the barrel remains stationary for an extended period, the welding wire relies entirely on external force to extend. As the welding process progresses, the welding wire is consumed layer by layer from the outside to the inside, and the winding radius gradually decreases. The stationary barrel lacks the ability to compensate for changes in the extension radius, making it unable to adapt to the differences in linear velocity caused by these changes. Simultaneously, the self-overlapping and compaction of multiple layers of welding wire leads to a continuous increase in contact friction between the inner layer of welding wire, the inner wall of the barrel, the outer wall of the barrel core, and adjacent welding wires. This makes it highly susceptible to phenomena such as localized biting, misalignment, and momentary jamming.

[0005] When a sudden local obstruction generates instantaneous resistance, the stationary barrel cannot adaptively buffer and release the allowance. The rigid tension of the wire feeding mechanism will directly act on the welding wire body, causing a sudden and sharp increase in wire tension. Existing conventional control methods can only adapt to stable wire feeding conditions and cannot quickly offset short-term abnormal resistance and tension changes. This frequently leads to wire damage, deformation, or even breakage, resulting in problems such as welding interruption, unstable arc, and weld formation defects.

[0006] In addition, in the static barrel mode, long-term rigid pulling will aggravate the wear of the welding wire surface, increase the wire feeding load, and increase the energy consumption and material consumption of the equipment simultaneously, which seriously restricts the continuous and stable operation of the automated welding production line, and the overall usage limitations are quite prominent. Summary of the Invention

[0007] The purpose of this invention is to provide a rotary mechanism for barrel-type welding wire, which solves the problems of traditional barrel-type welding wire operation where the barrel is fixed and stationary, the welding wire relies entirely on the wire feeding mechanism to forcibly pull out the material, the frictional resistance between the welding wire and the barrel, barrel core and interlayer is large, and instantaneous jamming and poor wire feeding smoothness are easy to occur.

[0008] The present invention adopts the following technical solution: a barrel-type welding wire rotary mechanism, including a rotary table, the rotary table being rotatably connected to a frame, a drive device being installed inside the frame, the drive device being used to drive the rotary table to rotate, a tension sensor being installed at the wire feeding mechanism, and a control unit being included. The control unit controls the rotation speed of the drive device based on the signal from the tension sensor, thereby controlling the rotation speed of the barrel to maintain the welding wire tension within a set range.

[0009] Furthermore, the frame includes two side plates, with a base plate fixedly connected between the two side plates. A vertical shaft is rotatably connected inside the base plate. An overrunning clutch mechanism and a power storage mechanism are provided between the top of the vertical shaft and the rotary table. The drive device drives the vertical shaft to rotate, and the vertical shaft drives the rotary table to rotate synchronously via the overrunning clutch mechanism, thereby driving the barrel to rotate together with the rotary table. The power storage mechanism synchronously accumulates elastic potential energy. When the power storage is completed, the power storage mechanism maintains the power storage state and rotates synchronously with the overrunning clutch mechanism.

[0010] Furthermore, the upper surfaces of the two side plates are provided with support plates that are fixedly connected to the two side plates. The overrunning clutch mechanism includes an inner disc fixedly connected to the top of the vertical shaft. The inner disc is located on the upper surface of the support plate and is rotatably connected to the support plate. An outer disc that is rotatably connected to the support plate is provided around the inner disc. A power plate is fixedly connected to the upper surface of the outer disc. The upper surface of the power plate is fixedly connected to the rotary table. The inner sidewall of the outer disc is provided with evenly arranged first ratchet teeth. The outer surface of the inner disc is provided with a number of first pawls along the circumference. The first pawls always rotate outward under the thrust of the first spring, so that the first pawls are located in the corresponding first ratchet teeth.

[0011] Furthermore, the outer surface of the inner disk is provided with a plurality of first receiving grooves, each first pawl is located in the corresponding first receiving groove and is hinged to the inner disk, and a first spring is fixedly connected between the first pawl and the inner sidewall of the first receiving groove. The first spring always pushes the first pawl to rotate outward, so that the first pawl is located in the corresponding first ratchet tooth.

[0012] Furthermore, the energy storage device includes an outer plate rotatably connected to the upper surface of the support plate, and a torsion spring is provided between the outer plate and the outer disk. One end of the torsion spring is fixedly connected to the outer disk, and the other end of the torsion spring is fixedly connected to the outer plate.

[0013] Furthermore, a lip plate is fixedly connected to the outer surface of the outer peripheral plate, a bottom beam is fixedly connected to the outer surface of each side plate, a hydraulic telescopic rod is fixedly connected to the upper end face of each bottom beam, and a thrust plate is provided below the lip plate, which is fixedly connected to the output shaft of each hydraulic telescopic rod.

[0014] Furthermore, an outer ring body is fixedly connected to the inner wall of the outer plate. Several second receiving grooves are formed in the outer ring body. Each second receiving groove is provided with a second pawl that is hinged to the outer ring body. The outer surface of the power plate is provided with evenly arranged second ratchet teeth. A second spring is fixedly connected between the second pawl and the inner wall of the second receiving groove. The second spring always drives the second pawl to rotate inward, so that the second pawl is located in the corresponding second ratchet tooth.

[0015] Furthermore, the drive device includes a motor fixedly connected to the left side of the two side plates, a drive wheel fixedly connected to the output shaft of the motor, and a driven wheel fixedly connected to the bottom end of the vertical shaft. The drive wheel and the driven wheel are connected by a synchronous belt drive.

[0016] Furthermore, a vertical beam is fixedly connected to the outer end of one of the bottom beams. A horizontal bar is provided at the top of the vertical beam. An L-shaped frame is provided at the end of the horizontal bar away from the vertical beam. A slider is slidably connected to the vertical part of the L-shaped frame in the up-down direction. An adjustment hole is opened in the slider. A sleeve is vertically installed in the adjustment hole. Two fixing nuts are threaded to the outer surface of the sleeve. The relative position of the sleeve and the slider is fixed by the upper fixing nut abutting against the upper end face of the slider and the lower fixing nut abutting against the lower end face of the slider.

[0017] Furthermore, a sector-shaped plate is fixedly connected to the top of the vertical beam, and an arc-shaped groove is opened on the upper end surface of the sector-shaped plate. The crossbar is hinged to the vertical beam, and a guide rod is fixedly connected to the lower end surface of the crossbar. The guide rod is located in the annular groove. A locking nut is threaded onto the guide rod located below the sector-shaped plate.

[0018] I. This invention, by setting up a rotary table, a drive device, a tension sensor, and a control unit, allows the drive device to rotate the rotary table during use. The rotary table then rotates the barrel to actively release the welding wire. The wire feeding mechanism continuously feeds the welding wire from the barrel into the welding torch, achieving continuous welding. The tension sensor continuously senses the tension of the welding wire. When the tension of the welding wire increases, the control unit controls the drive device to increase its rotation speed based on the signal from the tension sensor, thereby reducing the tension of the welding wire. When the tension data measured by the tension sensor is within the normal range, the control unit controls the drive device to maintain its original speed.

[0019] II. This invention, through the configuration of a vertical shaft, drive device, rotary table, overrunning clutch mechanism, and energy storage mechanism, allows for efficient operation. When the tension sensor detects a sudden and abnormal increase in welding wire tension, the control unit, based on the tension feedback signal, controls the energy storage mechanism to rapidly release stored energy. The energy storage mechanism instantaneously outputs auxiliary thrust and compensating torque to the rotary table, causing it to briefly accelerate to the set speed from its original rotational speed, simultaneously increasing the speed of the drum and instantly creating an appropriate amount of welding wire allowance. The welding wire tension then quickly drops, effectively eliminating overload stress caused by momentary jamming and avoiding the risk of welding wire breakage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 3 This is a schematic diagram of the internal three-dimensional structure of a barrel in the prior art. Figure 4 This is a schematic diagram of the three-dimensional structure of the vertical beam in this invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the barrel core in this invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the rotary table in this invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the side plate in this invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the motor in this invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the outer plate in this invention; Figure 10 This is a schematic diagram of the internal three-dimensional structure of the outer peripheral plate in this invention; Figure 11 This is a schematic diagram of the internal three-dimensional structure of the power plate in this invention; Figure 12 This is a top view of the internal structure of the power plate in this invention; Figure 13 This is a schematic diagram of the three-dimensional structure of the inner disk in this invention; Figure 14 This is a schematic diagram of the three-dimensional structure of the torsion spring in this invention; Figure 15 This is a schematic diagram of the internal three-dimensional structure of the inner disk in this invention; Figure 16 This is a top view of the internal structure of the inner disk in this invention; Figure 17 This is a schematic diagram of the three-dimensional structure of the first pawl in this invention; Figure 18 This is a schematic diagram of the vertical shaft three-dimensional structure in this invention.

[0021] In the diagram, 1. Barrel body; 2. Barrel core; 3. Conical cover; 4. Wire sleeve; 5. Rotary disc; 6. Frame; 7. Side plate; 8. Base plate; 9. Vertical shaft; 10. Support plate; 11. Inner disc; 12. Outer disc; 13. Power plate; 14. First ratchet; 15. First pawl; 16. First spring; 17. First receiving groove; 18. Outer plate; 19. Torsion spring; 20. Lip plate; 21. Bottom beam; 22. Hydraulic telescopic rod; 23. Thrust plate; 24. Outer ring; 25. ... 26. Second pawl; 27. Second ratchet; 28. Second spring; 29. ​​Roller; 30. Motor; 31. Drive wheel; 32. Driven wheel; 33. Synchronous belt; 34. Vertical beam; 35. Crossbar; 36. L-frame; 37. Slider; 38. Adjustment hole; 39. Sleeve; 40. Fixing nut; 41. Annular groove; 42. Radial rod; 43. Offset block; 44. Through hole; 45. Sector plate; 46. Arc groove; 47. Guide rod; 48. Locking nut. Detailed Implementation

[0022] Please see Figure 1-18 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: The existing barrel-type welding wire includes a cylindrical barrel 1, with a barrel core 2 coaxially fixed to the bottom wall of the barrel 1. The welding wire is coiled around the outer circumference of the barrel core 2 and layered and filled in the annular cavity between the barrel core 2 and the barrel 1. In use, the lid at the top of the barrel 1 is opened, and then a transparent conical cover 3 is placed upside down on the top of the barrel 1. An operation port (not shown in the figure) is provided on the side of the transparent conical cover 3. A wire sleeve 4 is fixedly connected to the top of the transparent conical cover 3. A person's hand is inserted into the conical cover 3 through the operation port and pulls the welding wire head upward through the bottom end of the wire sleeve 4 and then through the top end of the wire sleeve 4. The welding wire is then pulled to the wire feeding mechanism and finally guided to the welding gun. During normal operation, the welding gun is in a continuous welding state. The wire feeding mechanism applies a traction force to the welding wire, so that the welding wire is continuously fed into the welding gun to meet the welding operation requirements. The welding wire in the annular cavity between the barrel core 2 and the barrel 1 is continuously extracted, thereby realizing continuous welding.

[0023] In the existing technology, the barrel 1 is stationary during operation, and the welding wire is pulled out from the barrel 1 entirely by the wire feeding mechanism, which often causes problems such as wire jamming and wire tangling, and even wire breakage.

[0024] The barrel-type welding wire rotary mechanism of the present invention includes a rotary table 5, which is rotatably connected to a frame 6. A driving device is installed inside the frame 6 to drive the rotary table 5 to rotate. During operation, the barrel 1 is placed on the rotary table 5 and the rotary table 5 drives the barrel 1 to rotate synchronously to actively release the welding wire and cooperate with the wire feeding mechanism to complete the continuous wire feeding operation.

[0025] The existing wire feeding mechanism is equipped with a tension sensor to detect the tension of the welding wire. It also includes a control unit, which controls the rotation speed of the drive device based on the signal from the tension sensor, thereby controlling the rotation speed of the barrel 1 to keep the welding wire tension within the set range.

[0026] In operation, the drive unit rotates the rotary table 5, which in turn rotates the barrel 1 to actively release the welding wire. The wire feeding mechanism continuously feeds the welding wire from the barrel 1 into the welding torch, enabling continuous welding. The welding wire reel is positioned between the barrel core 2 and the barrel 1. When the welding wire is drawn out from the outside of the reel, its linear velocity at the exit point is greater than the corresponding linear velocity when drawn out from the inside of the reel. The welding wire reel winds around the annular area formed by the barrel core 2 and the barrel 1. During the welding operation, the welding wire is consumed layer by layer from the outside to the inside, and the effective winding radius of the welding wire reel continuously decreases. With the angular velocity of the barrel remaining constant, the linear velocity is directly proportional to the radius of rotation. Therefore, the linear velocity of the welding wire when it is drawn from the outside of the reel is significantly greater than that when it is drawn from the inside of the reel. Thus, the tension sensor continuously senses the tension of the welding wire. When the tension of the welding wire increases, the control unit controls the drive device to increase its rotation speed based on the signal from the tension sensor to reduce the tension of the welding wire. When the tension data measured by the tension sensor is within the normal range, the control unit controls the drive device to maintain its original speed.

[0027] However, even after adding a rotary table 5 to rotate the barrel 1 and actively release the welding wire, the problem of welding wire breakage still exists in actual use. Welding wire breakage is not only caused by complete jamming; under continuous wire feeding conditions, the welding wire is prone to momentary jamming with the inner wall of the barrel 1, the outer wall of the barrel core 2, or adjacent welding wires, causing a sudden increase in wire feeding resistance, resulting in a sudden increase in welding wire tension, which eventually exceeds the welding wire's load-bearing limit and causes breakage. Although the tension sensor and control unit can compensate for the difference in linear speed between the inner and outer coils of the welding wire reel, they cannot cope with momentary operating disturbances and cannot eliminate the abnormal increase in tension caused by localized welding wire jamming.

[0028] To address the aforementioned issues, in this embodiment, the frame 6 includes two side plates 7, with a base plate 8 fixedly connected between the two side plates 7. A vertical shaft 9 is rotatably connected within the base plate 8. An overrunning clutch mechanism and a power storage mechanism are provided between the top of the vertical shaft 9 and the rotary table 5. The drive device drives the vertical shaft 9 to rotate, and the vertical shaft 9 drives the rotary table 5 to rotate synchronously via the overrunning clutch mechanism, thereby causing the barrel 1 to rotate together with the rotary table 5, achieving smooth rotation of the barrel 1 and active release of the welding wire. Simultaneously, the power storage mechanism accumulates elastic potential energy. Once the power storage is complete, the power storage mechanism rotates synchronously with the overrunning clutch mechanism.

[0029] When the tension sensor detects a sudden and abnormal increase in the welding wire tension, the control unit, based on the tension feedback signal, controls the energy storage mechanism to quickly release stored energy. The energy storage mechanism instantly outputs auxiliary thrust and compensating torque to the rotary table 5, causing the rotary table 5 to briefly accelerate to the set speed from its original speed, driving the barrel 1 to accelerate synchronously, instantly creating an appropriate amount of welding wire allowance. The welding wire tension then quickly drops, effectively eliminating the overload stress caused by the instantaneous jamming and avoiding the risk of welding wire breakage.

[0030] Please see Figure 16 In this embodiment, the upper surfaces of the two side plates 7 are provided with support plates 10 that are fixedly connected to the two side plates 7. The overrunning clutch mechanism includes an inner disk 11 fixedly connected to the top of the vertical shaft 9. The inner disk 11 is located on the upper surface of the support plate 10 and is rotatably connected to the support plate 10. An outer disk 12 rotatably connected to the support plate 10 is provided around the inner disk 11. A power plate 13 is fixedly connected to the upper surface of the outer disk 12. The upper surface of the power plate 13 is fixedly connected to the rotary table 5. The inner sidewall of the outer disk 12 is provided with uniformly arranged first ratchet teeth 14. The outer surface of the inner disk 11 is provided with a plurality of first pawls 15 along the circumference. The first pawls 15 always rotate outward under the thrust of the first spring 16, so that the first pawls 15 are located in the corresponding first ratchet teeth 14.

[0031] Please see Figure 16 In operation, the drive unit drives the vertical shaft 9 to rotate, which in turn drives the inner disc 11 to rotate. The inner disc 11, through the first pawl 15 and the first ratchet 14, pushes the outer disc 12 to rotate clockwise. The outer disc 12 drives the power plate 13 to rotate clockwise, which in turn drives the rotary table 5 to rotate clockwise, thus achieving smooth rotation of the barrel 1 and active release of the welding wire. When the tension sensor detects an instantaneous abnormal increase in the welding wire tension, the control unit, based on the tension feedback signal, controls the energy storage mechanism to quickly release the stored energy. The energy storage mechanism instantaneously outputs auxiliary thrust and compensating torque to the power plate 13, enabling the power plate 13 to briefly increase its speed from its original rotational speed. When the set speed is reached, the power plate 13 accelerates, which in turn drives the outer disk 12 to accelerate, while the inner disk 11 remains synchronized with the speed of the drive device. Therefore, the speed of the outer disk 12 exceeds that of the inner disk 11. At this time, the first pawl 15 on the inner disk 11 is squeezed into the inner disk 11. When the power storage mechanism is released, the speed of the power plate 13 and the outer disk 12 decreases. At this time, the first pawl 15 of the inner disk 11 re-enters the corresponding first ratchet 14 under the thrust of the first spring 16. The inner disk 11 pushes the outer disk 12 to rotate through the first pawl 15, and the outer disk 12 returns to its original speed. After a brief acceleration, the barrel 1 also returns to its original speed.

[0032] In this embodiment, the outer surface of the inner disk 11 is provided with a plurality of first receiving grooves 17. Each first pawl 15 is located in the corresponding first receiving groove 17 and is hinged to the inner disk 11. A first spring 16 is fixedly connected between the first pawl 15 and the inner sidewall of the first receiving groove 17. The first spring 16 always pushes the first pawl 15 to rotate outward, so that the first pawl 15 is located in the corresponding first ratchet 14. When the outer disk 12 rotates clockwise past the inner disk 11, the first pawl 15 will be squeezed into the first receiving groove 17 by the first ratchet 14, which does not prevent the outer disk 12 from rotating past the inner disk 11.

[0033] In this embodiment, the power storage device includes an outer plate 18 rotatably connected to the upper surface of the support plate 10. A torsion spring 19 is provided between the outer plate 18 and the outer disk 12. One end of the torsion spring 19 is fixedly connected to the outer disk 12, and the other end of the torsion spring 19 is fixedly connected to the outer plate 18.

[0034] In this embodiment, a lip plate 20 is fixedly connected to the outer surface of the outer plate 18, a bottom beam 21 is fixedly connected to the outer surface of each side plate 7, a hydraulic telescopic rod 22 is fixedly connected to the upper end face of each bottom beam 21, and a thrust plate 23 is provided below the lip plate 20, which is fixedly connected to the output shaft of each hydraulic telescopic rod 22.

[0035] Please see Figure 12 In this embodiment, an outer ring 24 is fixedly connected to the inner sidewall of the outer plate 18. A plurality of second receiving grooves 25 are formed in the outer ring 24. Each second receiving groove 25 is provided with a second pawl 26 that is hinged to the outer ring 24. The outer surface of the power plate 13 is provided with uniformly arranged second ratchet teeth 27. A second spring 28 is fixedly connected between the second pawl 26 and the inner sidewall of the second receiving groove 25. The second spring 28 always drives the second pawl 26 to rotate inward, so that the second pawl 26 is located in the corresponding second ratchet tooth 27.

[0036] Please see Figure 12 During operation, the control unit controls the output axis of the hydraulic telescopic rod 22 to extend upward, pushing the thrust plate 23 upward, so that the upper end face of the thrust plate 23 is tightly attached to the lip plate 20, and a constant set thrust force is applied to the lip plate 20; the drive device drives the vertical shaft 9 to rotate, the vertical shaft 9 drives the inner disk 11 to rotate synchronously, the inner disk 11 drives the outer disk 12 to rotate through the first pawl 15, the outer disk 12 drives the power plate 13 to rotate, the power plate 13 further drives the rotary table 5 to rotate clockwise, thereby driving the barrel 1 to rotate synchronously, realizing the normal wire feeding function of the barrel 1 actively and smoothly releasing the welding wire.

[0037] Please see Figure 12During the rotation of the outer disk 12, the outer plate 18 remains stationary. The outer disk 12 synchronously pulls one end of the torsion spring 19, causing the torsion spring 19 to gradually accumulate elastic potential energy. When the stored torque of the torsion spring 19 reaches a set threshold and exceeds the pushing force of the thrust plate 23 on the lip plate 20, the lip plate 20 is pressed and begins to rotate, ending the single energy storage process. Afterward, the outer disk 12 continues to rotate, and through the torsion spring 19, it drives the outer plate 18, the lip plate 20, and the outer ring 24 to rotate together. Since the rotation of the lip plate 20 needs to continuously overcome the pressing resistance of the thrust plate 23, the torsion spring 19 maintains a stable energy storage state for a long time, ensuring that the compensation torque is always available.

[0038] Please see Figure 12 When the tension sensor detects a sudden and abnormal increase in the welding wire tension, the control unit synchronously controls the retraction of the two sets of hydraulic telescopic rods 22, causing the thrust plate 23 to descend and quickly disengage from the constraint of the lip plate 20. At this moment, the torsion spring 19 instantly releases its stored elastic potential energy, driving the lip plate 20 to rotate rapidly clockwise. The lip plate 20, the outer plate 18, and the outer ring body 24 rotate synchronously. The outer ring body 24 applies an additional clockwise compensation torque to the power plate 13 through the second pawl 26, causing the power plate 13 to instantly increase its speed on top of its original operating speed. This, in turn, drives the rotary table 5 and the barrel 1 to accelerate synchronously for a short time, quickly forming a quantitative welding wire redundancy, instantly dissipating the welding wire overload tension, and effectively avoiding the welding wire breakage problem caused by instantaneous jamming.

[0039] Please see Figure 12 After the tension value detected by the tension sensor returns to normal, the control unit controls the two sets of hydraulic telescopic rods 22 to extend synchronously again, pushing the thrust plate 23 upward and re-attaching to the limiting lip plate 20, restricting the free rotation of the lip plate 20; the outer disk 12 continues to operate and drives the torsion spring 19 to gradually accumulate force again until the force of the torsion spring 19 overcomes the pushing force of the thrust plate 23 again, and the lip plate 20 rotates synchronously with the outer disk 12 again, the force accumulation process ends, the mechanism resets and stands ready for rapid compensation in the next tension abnormality; during this process, the outer ring body 24 stops rotating, the power plate 13 rotates clockwise, and at this time the second pawl 26 is squeezed into the second receiving groove 25 by the second ratchet 27.

[0040] In this embodiment, the upper end face of the thrust plate 23 is provided with a plurality of uniformly arranged rollers 29 along the radial direction. When the lip plate 20 rotates against the thrust of the thrust plate 23, the lip plate 20 drives each roller 29 to rotate, thereby improving the stability of the rotation of the lip plate 20.

[0041] In this embodiment, the driving device includes a motor 30 fixedly connected to the left side of the two side plates 7. The output shaft of the motor 30 is fixedly connected to a drive wheel 31, and the bottom end of the vertical shaft 9 is fixedly connected to a driven wheel 32. The drive wheel 31 and the driven wheel 32 are connected by a synchronous belt 33. In use, the motor 30 drives the vertical shaft 9 to rotate through the drive wheel 31, the synchronous belt 33 and the drive wheel.

[0042] In this embodiment, a vertical beam 34 is fixedly connected to the outer end of one of the bottom beams 21. A horizontal bar 35 is provided at the top of the vertical beam 34. An L-frame 36 is provided at the end of the horizontal bar 35 away from the vertical beam 34. A slider 37 is slidably connected to the vertical part of the L-frame 36 along the up-down direction. An adjustment hole 38 is provided in the slider 37. A sleeve 39 is vertically provided in the adjustment hole 38. Two fixing nuts 40 are threadedly connected to the outer surface of the sleeve 39. The relative position of the sleeve 39 and the slider 37 is fixed by the upper fixing nut 40 abutting against the upper end face of the slider 37 and the lower fixing nut 40 abutting against the lower end face of the slider 37.

[0043] In use, place the barrel 1 on the turntable 5, then manually lift the slider 37 upwards, and then fix the transparent conical cover 3 at the top of the barrel 1. Then slide the slider 37 downwards so that the bottom end of the sleeve 39 falls on the horizontal part of the L frame 36 and the wire sleeve 4 of the transparent conical cover 3 is inserted into the sleeve 39. Then, reach your hand into the transparent conical cover 3 through the operating port and insert the welding wire head from bottom to top into the wire sleeve 4 and into the sleeve 39, finally extending out from the top of the sleeve 39 and leading it to the wire feeding mechanism. Then the motor 30 can drive the barrel 1 to rotate. The barrel 1 and the transparent conical cover 3 rotate, while the L frame 36 and the sleeve 39 remain stationary.

[0044] In this embodiment, an annular groove 41 is provided inside the transparent conical cover 3, and a radial rod 42 is provided inside the annular groove 41. The radial rod 42 can slide inside the annular groove 41, and an offline block 43 is sleeved on the radial rod 42. A through hole 44 is provided on the offline block 43, and the welding wire passes through the through hole 44 of the offline block 43. In use, both the offline block 43 and the radial rod 42 can make adaptive movements to follow the welding wire, preventing the welding wire from getting tangled.

[0045] In this embodiment, a sector plate 45 is fixedly connected to the top of the vertical beam 34. An arc groove 46 is formed on the upper surface of the sector plate 45. The horizontal bar 35 is hinged to the vertical beam 34. A guide rod 47 is fixedly connected to the lower surface of the horizontal bar 35. The guide rod 47 is located in the annular groove 41. A locking nut 48 is threaded onto the guide rod 47 located below the sector plate 45. Loosening the locking nut 48 allows the horizontal bar 35 to rotate. At the same time, the guide rod 47 slides in the arc groove 46, rotating the horizontal bar 35 to a position slightly above the turntable 5, which facilitates the placement of the barrel 1. Then, the horizontal bar 35 is rotated to a position directly above the barrel 1, and the locking nut 48 is tightened to prevent the horizontal bar 35 from rotating.

[0046] The working principle of this invention is as follows: During operation, the control unit controls the output axis of the hydraulic telescopic rod 22 to extend upward, pushing the thrust plate 23 upward, so that the upper end surface of the thrust plate 23 is tightly attached to the lip plate 20, and a constant set pushing force is applied to the lip plate 20; the drive device drives the vertical shaft 9 to rotate, the vertical shaft 9 drives the inner disk 11 to rotate synchronously, the inner disk 11 drives the outer disk 12 to rotate through the first pawl 15, the outer disk 12 drives the power plate 13 to rotate, the power plate 13 further drives the rotary table 5 to rotate clockwise, thereby driving the barrel 1 to rotate synchronously, realizing the normal wire feeding function of the barrel 1 actively and smoothly releasing the welding wire. During the rotation of the outer disk 12, the outer plate 18 remains stationary, and the outer disk 12 synchronously pulls one end of the torsion spring 19 to move, so that the torsion spring 19 gradually accumulates elastic potential energy; when the stored torque of the torsion spring 19 reaches the set threshold and exceeds the pushing force of the thrust plate 23 on the lip plate 20, the lip plate 20 is pressed open and rotates, and the single storage process ends. Subsequently, the outer disc 12 continues to rotate, driving the outer plate 18, lip plate 20, and outer ring 24 to rotate together via the torsion spring 19. Since the lip plate 20 needs to continuously overcome the resistance of the thrust plate 23 during rotation, the torsion spring 19 maintains a stable, stored-force state to ensure the compensation torque is always available. When the tension sensor detects an instantaneous abnormal increase in the welding wire tension, the control unit synchronously controls the retraction of the two sets of hydraulic telescopic rods 22, causing the thrust plate 23 to descend and quickly disengage from the lip plate 20. At this moment, the torsion spring 19 instantly releases its stored elastic potential energy, driving the lip plate 20 to rotate rapidly clockwise. The lip plate 20, outer plate 18, and outer ring 24 rotate synchronously. The outer ring 24 applies an additional clockwise compensation torque to the power plate 13 via the second pawl 26, causing the power plate 13 to instantly increase its speed on top of its original operating speed. This, in turn, drives the rotary table 5 and the barrel 1 to accelerate synchronously for a short period, quickly forming a quantitative welding wire redundancy, instantly dissipating the welding wire overload tension, and effectively avoiding the welding wire breakage problem caused by instantaneous jamming. After the tension value detected by the tension sensor returns to normal, the control unit controls the two sets of hydraulic telescopic rods 22 to extend synchronously again, pushing the thrust plate 23 upward and re-attaching to the limiting lip plate 20, restricting the free rotation of the lip plate 20; the outer disk 12 continues to operate and drives the torsion spring 19 to gradually accumulate force again, until the force of the torsion spring 19 overcomes the pushing force of the thrust plate 23 again, the lip plate 20 rotates synchronously with the outer disk 12 again, the force accumulation process ends, the mechanism resets and stands ready for rapid compensation in the next tension abnormality.

Claims

1. A rotary mechanism for barrel-type welding wire, characterized in that: It includes a rotary table, which is rotatably connected to the frame. A drive device is installed inside the frame to drive the rotary table to rotate. A tension sensor is installed at the wire feeding mechanism. It also includes a control unit, which controls the rotation speed of the drive device based on the signal from the tension sensor, thereby controlling the rotation speed of the barrel to keep the welding wire tension within a set range.

2. The rotary mechanism according to claim 1, characterized in that: The frame includes two side plates, with a base plate fixedly connected between the two side plates. A vertical shaft is rotatably connected inside the base plate. An overrunning clutch mechanism and a power storage mechanism are provided between the top of the vertical shaft and the rotary table. The drive device drives the vertical shaft to rotate, and the vertical shaft drives the rotary table to rotate synchronously via the overrunning clutch mechanism, thereby driving the barrel to rotate together with the rotary table. The power storage mechanism accumulates elastic potential energy synchronously. When the power storage is completed, the power storage mechanism maintains the power storage state and rotates synchronously with the overrunning clutch mechanism.

3. The rotary mechanism according to claim 2, characterized in that: The upper surfaces of the two side plates are provided with support plates that are fixedly connected to the two side plates. The overrunning clutch mechanism includes an inner plate fixedly connected to the top of the vertical shaft. The inner plate is located on the upper surface of the support plate and is rotatably connected to the support plate. An outer plate that is rotatably connected to the support plate is provided around the inner plate. A power plate is fixedly connected to the upper surface of the outer plate. The upper surface of the power plate is fixedly connected to the rotary table. The inner sidewall of the outer plate is provided with evenly arranged first ratchet teeth. The outer surface of the inner plate is provided with a number of first pawls along the circumference. The first pawls always rotate outward under the thrust of the first spring, so that the first pawls are located in the corresponding first ratchet teeth.

4. The rotary mechanism according to claim 3, characterized in that: The outer surface of the inner disk is provided with a plurality of first receiving grooves. Each first pawl is located in the corresponding first receiving groove and is hinged to the inner disk. A first spring is fixedly connected between the first pawl and the inner sidewall of the first receiving groove. The first spring always pushes the first pawl to rotate outward, so that the first pawl is located in the corresponding first ratchet tooth.

5. The rotary mechanism according to claim 3, characterized in that: The energy storage device includes an outer plate rotatably connected to the upper surface of the support plate, and a torsion spring is provided between the outer plate and the outer disk. One end of the torsion spring is fixedly connected to the outer disk, and the other end of the torsion spring is fixedly connected to the outer plate.

6. The rotary mechanism according to claim 5, characterized in that: The outer surface of the outer plate is fixedly connected to a lip plate, the outer surface of each side plate is fixedly connected to a bottom beam, the upper end face of each bottom beam is fixedly connected to a hydraulic telescopic rod, and a thrust plate is provided below the lip plate, which is fixedly connected to the output shaft of each hydraulic telescopic rod.

7. The rotary mechanism according to claim 6, characterized in that: The outer ring body is fixedly connected to the inner wall of the outer plate. Several second receiving grooves are formed in the inner wall of the outer ring body. Each second receiving groove is provided with a second pawl that is hinged to the outer ring body. The outer surface of the power plate is provided with evenly arranged second ratchet teeth. A second spring is fixedly connected between the second pawl and the inner wall of the second receiving groove. The second spring always drives the second pawl to rotate inward so that the second pawl is located in the corresponding second ratchet tooth.

8. The rotary mechanism according to claim 2, characterized in that: The drive device includes a motor fixedly connected to the left side of the two side plates. The output shaft of the motor is fixedly connected to a drive wheel, and the bottom end of the vertical shaft is fixedly connected to a driven wheel. The drive wheel and the driven wheel are connected by a synchronous belt drive.

9. The rotary mechanism according to claim 6, characterized in that: One of the bottom beams is fixedly connected to a vertical beam at its outer end. A horizontal bar is installed at the top of the vertical beam. An L-shaped frame is installed at the end of the horizontal bar away from the vertical beam. A slider is slidably connected to the vertical part of the L-shaped frame in the up-down direction. An adjustment hole is opened in the slider. A sleeve is vertically installed in the adjustment hole. Two fixing nuts are threaded to the outer surface of the sleeve. The relative position of the sleeve and the slider is fixed by the upper fixing nut abutting against the upper end face of the slider and the lower fixing nut abutting against the lower end face of the slider.

10. The rotary mechanism according to claim 9, characterized in that: A sector plate is fixedly connected to the top of the vertical beam. An arc groove is opened on the upper end surface of the sector plate. The crossbar is hinged to the vertical beam. A guide rod is fixedly connected to the lower end surface of the crossbar. The guide rod is located in the annular groove. A locking nut is threaded onto the guide rod located below the sector plate.

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