A welding manufacturing tool for a pole iron accessory

Abstract

The application relates to the field of welding and discloses a power pole iron accessory welding manufacturing tool, which comprises a support frame, two bending assemblies are arranged side by side on the support frame, and a welding assembly is arranged above the two bending assemblies; wherein the bending assembly comprises a rotating shaft rotatably arranged on the support frame, a first motor for driving the rotating shaft to rotate, a disc sleeve arranged on the rotating shaft, an adjustable blocking column arranged on the disc and a variable-diameter center sleeve sleeve arranged on the end of the rotating shaft. By arranging the variable-diameter center sleeve driven by the conical table, different specifications of the bending ring diameter can be quickly adapted without replacing the tool, and the adjustment time during specification switching is reduced; by arranging the arc-shaped blocks capable of sliding to the disc direction during the bending process between the arc-shaped plates, the continuous axial thrust is applied to the reinforcing steel bars, the bending deflection is prevented, and the misalignment between the back-bending part and the pole body is eliminated.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a welding manufacturing fixture for iron accessories on utility poles. Background Technology

[0002] Guy rods (or ground anchor tie rods) in power pole fittings are key load-bearing components used to connect guy wires and ground anchors in power lines. Their typical structure involves bending both ends of round steel or reinforcing steel into rings in opposite directions, then fitting the bent-back portion alongside the pole body, and finally welding them together to form a double-ear shape. Currently, the manufacturing of this type of fitting generally involves bending each ear individually, that is, bending both ends of the pole sequentially on a bending machine, and then welding the overlapping parts. Existing bending equipment typically relies on a central column as the bending reference, forming rings by bending the pole ends around the central column. Since different sizes of guy rods require different ring diameters, the production process requires frequent changes of the corresponding size central column, which is cumbersome and affects processing efficiency. Furthermore, during the bending process, the pole is only manually supported and positioned, lacking effective radial constraint, making it prone to skewing. This results in the bent-back portion not being accurately aligned with the pole body, causing difficulties for subsequent welding.

[0003] However, the existing technology has the following problems in practical applications: after the two ends of the drawbar are bent into loops, the folded-back portion must be aligned and fitted with the rod body before welding. This requires the two bent loops to maintain precise positioning throughout the forming process. However, existing bending equipment lacks an anti-skew constraint mechanism for the rod throughout the bending process, relying solely on manual visual inspection and manual support for positioning. During bending, the rod is prone to circumferential rotation or axial movement, leading to misalignment and uneven gaps between the folded-back portion and the rod body after bending, severely affecting welding quality. Furthermore, frequently changing the center column to accommodate different specifications not only reduces production efficiency but also increases the complexity of tooling management. If a positioning structure that can quickly adjust the bending radius according to different specifications and has a full-process anti-skew guidance function could be integrated into the bending tooling, it is expected to fundamentally solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a welding manufacturing fixture for utility pole iron accessories. This fixture solves the problems of existing utility pole iron accessory bending fixtures, which lack full-process anti-skew constraints and require frequent replacement of the center column to adapt to different specifications. These problems result in misalignment between the bent portion and the pole body after bending, making welding difficult, and also lead to low efficiency in specification switching.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding manufacturing fixture for utility pole iron accessories, comprising a support frame, on which two bending assemblies are arranged side by side, and a welding assembly is disposed above the two bending assemblies; wherein, the bending assembly includes a rotating shaft rotatably mounted on the support frame, a first motor driving the rotating shaft to rotate, a disc sleeved on the rotating shaft, an adjustable blocking post disposed on the disc, and a variable-diameter central sleeve sleeved at the end of the rotating shaft, the central sleeve including a cylindrical body, a plurality of arc-shaped plates disposed on the outer periphery of the cylindrical body, and a truncated cone disposed within the cylindrical body, the truncated cone driving each of the arc-shaped plates to extend and retract to change diameter, an arc-shaped block slidably disposed between adjacent arc-shaped plates, the arc-shaped block and the adjacent arc-shaped plate slidingly engaging through a limiting inclined groove, the bending assembly further including a hydraulic extrusion component disposed above the central sleeve, and the welding assembly being movably disposed on the upper end of the support frame.

[0006] Preferably, the blocking post includes a straight rod and a cylinder disposed at one end of the straight rod. A first strip groove is formed on the disc along its radial direction. The straight rod passes through the first strip groove, and a nut is screwed to one end of the straight rod that passes through the first strip groove.

[0007] Preferably, the outer wall of the central sleeve is provided with a plurality of limiting holes at equal intervals, and a connecting rod is provided between each of the arc-shaped plates and the cylinder. Each connecting rod passes through the corresponding limiting hole, and a third spring is sleeved on each connecting rod. One end of the third spring abuts against the corresponding arc-shaped plate, and the other end of the third spring abuts against the outer wall of the cylinder.

[0008] Preferably, each of the arc-shaped plates has a limiting groove on its side facing the adjacent arc-shaped plate, and an arc-shaped groove is formed on the arc-shaped block. Two sliding feet are slidably disposed in the arc-shaped groove, and the two sliding feet are respectively slidably engaged with the limiting grooves on the two adjacent arc-shaped plates.

[0009] Preferably, the width of each limiting groove gradually increases in the direction away from the disk, and a notch is provided at one end of each limiting groove away from the disk. A first spring is provided in each limiting groove, and the first spring is used to push the sliding foot to move towards the disk.

[0010] Preferably, each of the arc-shaped plates has a groove on its outer wall, a pressing plate is provided in the groove, a second spring is provided between the pressing plate and the bottom of the groove, and pressing feet are provided on both sides of one end of the pressing plate. Each pressing foot is arranged opposite to the corresponding notch, and is used to push out the sliding foot located in the notch.

[0011] Preferably, the rotating shaft is mounted on the support frame via a bearing seat, and one end of the rotating shaft is connected to the first motor via a reducer. The first motor is located on one side of the support frame.

[0012] Preferably, the hydraulic extrusion component further includes a mounting base, which is sleeved on the outer wall of the rotating shaft via a bearing. A clamping bolt is provided on the side of the mounting base, and a second slot is provided on the mounting base. A hydraulic telescopic rod is installed upside down on the mounting base, and the output shaft of the hydraulic telescopic rod is slidably disposed in the second slot.

[0013] Preferably, the output end of the hydraulic telescopic rod is provided with the pushing block, the lower surface of the pushing block is an arc-shaped surface, and the cross-sectional area of ​​the pushing block gradually increases along the direction away from the disc.

[0014] Preferably, the welding assembly includes a movable track disposed on the upper end of the support frame, a movable seat slidably disposed on the movable track, a lifting seat disposed on the movable seat, a rotating seat disposed on the lifting seat, a welding torch mounted on the rotating seat, and the welding torch being located above the disc and on the same side as the disc.

[0015] This invention provides a welding manufacturing fixture for iron accessories on utility poles. It has the following beneficial effects: First, by setting up a variable-diameter central sleeve consisting of a cylinder, multiple arc-shaped plates, and a frustum, and threading the frustum with an electric screw 2513, when the frustum moves axially, the conical surface of the outer wall of the frustum simultaneously pushes against each arc-shaped plate, causing it to expand or contract radially. Since the arc-shaped plates are evenly distributed around the outer periphery of the cylinder and are synchronously driven by the conical surface of the frustum, the expansion of each arc-shaped plate remains consistent. The outer diameter of the central sleeve can be steplessly adjusted according to the processing specifications. This structure allows operators to adapt to the processing needs of bending rings of different diameters without disassembling or replacing the central column, reducing tooling adjustment time during specification changes and improving production efficiency.

[0016] Secondly, by setting arc-shaped blocks between adjacent arc-shaped plates and a sliding fit structure consisting of limiting grooves and sliding feet between the arc-shaped blocks and adjacent arc-shaped plates, and simultaneously setting a first spring in the limiting groove, the arc-shaped blocks can slide towards the disk direction along the limiting groove under the push of the first spring after the sliding feet are released from the notch constraint. When the arc-shaped blocks move towards the disk, their outer wall pushes the bent steel bars to move synchronously towards the end face of the disk. During the entire bending process, a continuous axial thrust is applied to the steel bars. This structure ensures that the steel bars always use the end face of the disk as the axial reference during the bending process, avoiding axial movement of the steel bars caused by the axial component of the bending force. This eliminates the misalignment and gap caused by the skew between the bent back part and the rod body, ensuring the butt joint accuracy and weld quality during subsequent welding.

[0017] Third, by setting a hydraulic extrusion component above the central sleeve, including a mounting base, a hydraulic telescopic rod, and a pushing block, and by making the lower surface of the pushing block arc-shaped with its cross-sectional area gradually increasing away from the disc, the pushing block applies pressure to the folded-back portion from above when the hydraulic telescopic rod extends. Simultaneously, the increased cross-sectional area on the outer side of the pushing block generates a horizontal component force towards the disc during continuous downward pressure. This horizontal component force, combined with the axial pushing force of the arc-shaped block towards the disc, ensures complete alignment and tight fit between the folded-back portion and the rod body in both the axial and circumferential directions, eliminating any residual gap between them. Furthermore, the mounting base is sleeved on the outer wall of the rotating shaft via bearings, preventing the hydraulic extrusion component from rotating synchronously with the shaft, thus ensuring the independence and stability of the clamping action and providing a suitable joint fit for the welding process. Attached Figure Description

[0018] Figure 1 The three-dimensional representation of the present invention Figure 1 ; Figure 2 The three-dimensional representation of the present invention Figure 2 ; Figure 3 This is a three-dimensional schematic diagram of the bending component of the present invention. Figure 1 ; Figure 4 This is a three-dimensional schematic diagram of the bending component of the present invention. Figure 2 ; Figure 5 This is a three-dimensional schematic diagram of the bending component of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the central sleeve of the present invention; Figure 7 This is a schematic cross-sectional view of the central sleeve of the present invention; Figure 8 This is a schematic cross-sectional view of the fit between the extrusion plate, extrusion foot, and sliding foot of the present invention. Figure 9 This is a schematic diagram of the welding assembly of the present invention.

[0019] Among them, 1. support frame; 2. bending assembly; 21. rotating shaft; 211. bearing seat; 22. first motor; 221. reducer; 23. disc; 231. first strip groove; 24. blocking post; 241. straight rod; 242. cylinder; 243. nut; 25. center sleeve; 251. cylinder body; 252. arc plate; 2521. groove; 253. cone; 254. arc block; 2541. arc groove; 2542. sliding foot; 255. limiting inclined groove; 2551. notch; 25 6. Limiting hole; 257. Connecting rod; 258. Third spring; 259. First spring; 2510. Second spring; 2511. Extrusion plate; 2512. Extrusion foot; 2513. Electric screw; 2514. Welding assembly; 31. Moving track; 32. Moving seat; 33. Lifting seat; 34. Rotating seat; 35. Welding torch; 4. Hydraulic extrusion component; 41. Mounting seat; 43. Clamping bolt; 44. Second slot; 45. Hydraulic telescopic rod; 451. Output shaft; 46. Push block. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 -Appendix Figure 2 This invention provides a welding manufacturing fixture for utility pole iron accessories, which includes a support frame 1 serving as the installation base to support all functional components of the fixture. Two bending components 2 are arranged side by side on the support frame 1. These two bending components 2 have identical structures and are symmetrically arranged, and are used to simultaneously bend both ends of a steel bar. The reason for the side-by-side arrangement is that iron accessories such as guy rods or ground anchor tie rods need to be bent at both ends of round steel or steel bars to form lugs. If a method of bending one side and then turning around to bend the other side is used, it is not only inefficient, but also prone to introducing positioning errors due to secondary clamping, causing the relative angle and position of the lugs at both ends to deviate from the design requirements. A movable welding component 3 is further provided above the two bending components 2. The welding component 3 can transfer the working position between the two bending components 2, so that after both ends of the steel bar are bent and formed, the overlapping welds at both ends are welded respectively, without having to remove the workpiece from the bending station and transfer it to the welding station, thus eliminating the positioning deviation caused by the intermediate transfer link.

[0022] Please see the appendix Figure 3 -Appendix Figure 8Specifically, regarding the composition of each bending component 2: First, the rotating shaft 21 is mounted on the support frame 1 via a bearing seat 211. The bearing seat 211 typically houses rolling bearings to withstand the radial load and a certain axial load generated during bending, ensuring the rotating shaft 21 can rotate smoothly under load. One end of the rotating shaft 21 is connected to the first motor 22 and the reducer 221. The purpose of using the reducer 221 is that bending the reinforcing bar requires a large torque, while the first motor 22 directly outputs a high speed and low torque, which does not meet the torque requirements of the bending process. The reducer 221 utilizes the reduction and torque amplification principle of a gear pair to convert the high-speed, low-torque output of the motor into a low-speed, high-torque output, thereby driving the rotating shaft 21 to drive the subsequent bending actuators to plastically bend the reinforcing bar with sufficient torque. The first motor 22 is positioned on one side of the support frame 1 for easy electrical connection to the control system and also for convenient maintenance and repair by operators. The other end of the rotating shaft 21 is fitted with a disc 23, which is fixedly connected to the rotating shaft 21. When the rotating shaft 21 is driven to rotate by the first motor 22, the disc 23 rotates synchronously. The disc 23 plays two roles in the bending process: firstly, it serves as the mounting base for the blocking column 24, and secondly, it serves as the reference surface for axial positioning when the steel bar is bent. The bent ring is limited by the end face of the disc 23 in the axial direction, thereby ensuring that the axial width of the bent ring is consistent with the design requirements.

[0023] The disc 23 is equipped with an adjustable blocking post 24. During bending, the blocking post 24 is the direct force-applying component that drives the end of the reinforcing bar to bend around the central sleeve 25. At the start of bending, one end of the reinforcing bar is clamped between the blocking post 24 and the central sleeve 25. As the blocking post 24 rotates with the disc 23 around the axis of the central sleeve 25, it pushes the end of the reinforcing bar to undergo plastic bending. The specific installation position of the blocking post 24 on the disc 23 can be adjusted along the radial first groove 231 of the disc 23. The blocking post 24 is inserted into the first slot 231 of the disc 23 by its straight rod 241 and locked with a nut 243, so as to realize the radial position adjustment and fixation of the disc 23. Therefore, the distance between the blocking post 24 and the axis of the central sleeve 25 can be adjusted according to the diameter of the steel bar to be processed and the position requirements of the bending start point. This adjustment function allows the tooling to adapt to steel bars of different diameters. When the diameter of the steel bar changes, the initial length of the bending lever arm can be changed by adjusting the radial position of the blocking post 24 to ensure the consistency of the bending effect.

[0024] Please see the appendix Figure 6 -Appendix Figure 8The end of the rotating shaft 21 is fitted with a variable diameter central sleeve 25. The central sleeve 25 is the core component that determines the inner diameter of the ring during the entire bending and forming process. When the steel bar is bent, it adheres to the outer wall surface of the central sleeve 25. The outer diameter of the central sleeve 25 directly corresponds to the inner diameter of the ring after bending. Since different specifications of pull rods have different requirements for the inner diameter of the earring, if the outer diameter of the central sleeve 25 is fixed, a central sleeve 25 of the corresponding size needs to be disassembled and replaced every time a different specification is changed. This operation is cumbersome and affects production efficiency. The specific structure of the central sleeve 25 includes a cylindrical body 251 and multiple arc-shaped plates 252 disposed around the outer periphery of the cylindrical body 251. The cylindrical body 251 is a base roughly cylindrical 242 in shape, and its interior is hollow to accommodate driving components such as a frustum 253 and an electric screw 2513. The multiple arc-shaped plates 252 are evenly distributed around the outer periphery of the cylindrical body 251. Each arc-shaped plate 252 slides through a limiting hole 256 on the cylindrical body 251 via a connecting rod 257. A third spring 258 is sleeved on the outer side of the portion of the two rods inside the cylindrical body 251. The outer wall surface of each arc-shaped plate 252 has an arc surface that matches the inner diameter of the bent annular ring. The frustum 253 is disposed inside the cylindrical body 251. The frustum 253 is generally truncated cone in shape, and its outer wall surface is an inclined conical surface. When 253 moves axially within the cylinder 251, its outer wall surface simultaneously contacts each of the arc-shaped plates 252 and applies radial thrust. Specifically, when the cone 253 moves towards the disk 23, the conical surface of the cone 253 gradually pushes each of the arc-shaped plates 252 outward, causing all the arc-shaped plates 252 to expand radially outward simultaneously, thereby increasing the overall outer diameter of the central sleeve 25. When the cone 253 moves in the opposite direction, the arc-shaped plates 252 lose the support of the cone 253 and can contract inward under the action of the third spring 258 sleeved on the outer wall of the connecting rod 257, thereby reducing the overall outer diameter of the central sleeve 25. In this way, the outer diameter of the central sleeve 25 can be steplessly adjusted according to processing needs, thus adapting to the requirements of the inner diameter of earrings of different specifications.

[0025] An arc-shaped block 254 is provided between adjacent arc-shaped plates 252, and the arc-shaped block 254 and the adjacent arc-shaped plate 252 are slidably engaged through a limiting groove 255. The arc-shaped block 254 plays a role in continuously pushing the reinforcing bar axially throughout the bending process, pressing the reinforcing bar against the disc 23 to prevent subsequent misalignment. At the initial stage of bending, the arc-shaped block 254 is located near the free end of the central sleeve 25. At the same time, the two adjacent arc-shaped plates 252 merge together, and the limiting grooves 255 of the two adjacent arc-shaped plates 252 also merge together. The two sliding feet 2542 of the arc-shaped block 254 are respectively in the notches 2551 of the two merged limiting grooves 255. As the bending angle increases, the reinforcing bar gradually wraps around the outer wall of the central sleeve 25. At this point, a continuous axial thrust needs to be applied to the reinforcing bar in the direction of the disc 23 to prevent the reinforcing bar from shifting or deviating axially during the bending process. The design of the first spring 259 in the limiting groove 255 determines that the arc block 254 can slide towards the disc 23 when subjected to specific triggering conditions. This allows the arc block 254 to drive the bent part of the reinforcing bar to move tightly against the end face of the disc 23, ensuring the accurate axial position of the annular ring after bending. This dynamic pushing mechanism is a key technical means to solve the bending deviation problem. Its specific working method will be further clarified in the description of the bending steps later.

[0026] Please see the appendix Figure 3 -Appendix Figure 8Specifically, each arc-shaped plate 252 has a limiting groove 255 on its side facing the adjacent arc-shaped plate 252. The limiting groove 255 is a strip-shaped groove 2521 structure formed on the side of the arc-shaped plate 252, and its length direction extends along the axial direction of the central sleeve 25. Since each arc-shaped plate 252 has two sides, left and right, facing the adjacent arc-shaped plates 252 on the two sides respectively, the limiting groove 255 is formed on both sides of each arc-shaped plate 252, so that the limiting groove 255 is formed on each pair of adjacent arc-shaped plates 252. A pair of opposing limiting grooves 255 are formed between adjacent arc-shaped plates 252. The width of the limiting grooves 255 gradually increases in the direction away from the disk 23. That is, the width of the limiting grooves 255 is smaller at the end closer to the disk 23 and larger at the end farther away from the disk 23. The purpose of this gradual width change is that when adjacent arc-shaped plates 252 are combined, the two adjacent sliding feet 2542 slide within the limiting grooves 255 as the sliding feet 2542 move away from the disk 23. A notch 2551 is provided at the end of the limiting grooves 255 away from the disk 23. The size of the notch 2551 is larger than the width of the limiting grooves 255 at that point. This notch is used to accommodate and position the sliding feet 2542 in a specific state, so that the arc-shaped block 254 can be maintained in the initial position away from the disk 23. Each limiting groove 255 is further provided with a first spring 259 at the end away from the disk 23. The first spring 259 is arranged along the length of the limiting groove 255. The first spring 259 is always in an energy storage state, that is, it always applies an elastic thrust to the sliding foot 2542 in the direction of approaching the disk 23, so that the sliding foot 2542 has a tendency to slide along the limiting groove 255 towards the disk 23. However, in the initial state, since the sliding foot 2542 is limited by the notch 2551, the thrust of the first spring 259 is not enough to overcome the limiting effect of the notch 2551 on the sliding foot 2542. Therefore, the arc block 254 can remain in the initial position.

[0027] An arc-shaped block 254 is disposed above the space between two adjacent arc-shaped plates 252. The overall shape of the arc-shaped block 254 is roughly tile-shaped or arc-shaped. An arc-shaped groove 2541 is provided on the arc-shaped block 254. The arc-shaped groove 2541 is located on the inner wall surface of the arc-shaped block 254 facing the axis of the central sleeve 25. The arc-shaped groove 2541 is opened along the arc direction of the arc-shaped block 254. Two sliding feet 2542 are slidably disposed in the arc-shaped groove 2541. Both sliding feet 2542 are accommodated in the arc-shaped groove 2541 and can slide relative to each other along the extension direction of the arc-shaped groove 2541. The two sliding feet 2542 are L-shaped and extend from both sides of the arc-shaped block 254 respectively, and each slides in cooperation with the limiting inclined groove 255 on the two adjacent arc-shaped plates 252. Specifically, one of the sliding feet 2542 is engaged with the limiting groove 255 of the adjacent arc plate 252 on the left, and the other sliding foot 2542 is engaged with the limiting groove 255 of the adjacent arc plate 252 on the right. Since both sliding feet 2542 are slidably disposed in the same arc groove 2541, the relative distance between them can vary freely within the length of the arc groove 2541. This variation is constrained by the positions of the two sliding feet 2542 in the limiting grooves 255 on both sides.

[0028] Each arc-shaped plate 252 has a groove 2521 on its outer wall. The groove 2521 is located in the middle area of ​​the outer wall of the arc-shaped plate 252 and its opening direction is outward, that is, towards the outer periphery of the central sleeve 25. An extrusion plate 2511 is provided in the groove 2521. The shape of the extrusion plate 2511 is adapted to the shape of the groove 2521, and the outer wall surface of the extrusion plate 2511 protrudes from the outer wall surface of the arc-shaped plate 252 in the initial state. A second spring 2510 is provided between the extrusion plate 2511 and the bottom of the groove 2521. The second spring 2510 is arranged along the depth direction of the groove 2521, with one end abutting against the bottom of the groove 2521 and the other end abutting against the inner wall surface of the extrusion plate 2511. In its initial state, the second spring 2510 is at its natural length, and its elastic force pushes the extrusion plate 2511 outward, keeping the outer wall of the extrusion plate 2511 protruding from the outer wall of the arc plate 252. Extrusion feet 2512 are respectively provided on the left and right sides of the end of the extrusion plate 2511 away from the disc 23. These two extrusion feet 2512 extend from the opposite sides of the extrusion plate 2511, each extending towards the two adjacent arc plates 252. The ends of the extrusion feet 2512 point to the notches 2551 at the end of the limiting grooves 255 on the corresponding side arc plate 252. In the initial state, the extrusion feet 2512 and the notches 2551 are spatially opposite to each other, but they are not in direct contact. The ends of the extrusion feet 2512 are adjacent to but do not extend into the notches 2551.

[0029] When the reinforcing bar adheres to the outer wall of the curved plate 252 during bending, it applies radial inward pressure. This pressure acts directly on the outer wall of the extrusion plate 2511. Because the outer wall of the extrusion plate 2511 protrudes from the outer wall of the curved plate 252, the reinforcing bar first contacts the outer wall of the extrusion plate 2511. After being subjected to the radial pressure of the reinforcing bar, the extrusion plate 2511 overcomes the elastic force of the second spring 2510 and retracts into the groove 2521. The inward contraction of plate 11 causes the pressing feet 2512 at both ends to move outward simultaneously. This movement of the pressing feet 2512 causes their ends to extend into the notches 2551 on the side of the adjacent arc-shaped plate 252, pushing the sliding foot 2542, which was originally stuck in the notches 2551, outward. This allows the sliding foot 2542 to break free from the limiting constraint of the notches 2551. Once the sliding foot 2542 breaks free from the notches 2551, its sliding along the limiting groove 255 is no longer affected by the notches 2551. When the block is blocked, the elastic force stored in the first spring 259 is released. The first spring 259 pushes the sliding foot 2542 to slide along the limiting groove 255 towards the disk 23. Since the two sliding feet 2542 are located in the limiting grooves 255 on the two adjacent arc plates 252 respectively, and the two sliding feet 2542 are connected by the arc block 254, the two sliding feet 2542 slide synchronously, driving the entire arc block 254 to move towards the disk 23. As the arc block 254 moves towards the disk 23, the outer wall of the arc block 254 pushes the steel bar that is already attached to the outer wall of the arc plate 252 to move synchronously towards the disk 23. Since the arc block 254 is always in contact with the steel bar during the movement, the steel bar is always subjected to a continuous pushing force towards the disk 23 during the entire bending process. This pushing force ensures that the bent part of the steel bar is always in close contact with the end face of the disk 23 in the axial direction, eliminating the possibility of the steel bar moving axially due to the axial component of the bending force.

[0030] After the bending is complete and the reinforcing bar is removed from the central sleeve 25, the pressure on the reinforcing bar on the outer wall of the arc plate 252 disappears. At this time, the second spring 2510 releases its elastic force, pushing the extrusion plate 2511 outward to reset. The reset of the extrusion plate 2511 causes the extrusion foot 2512 to exit from the notch 2551 and return to its initial position. Since the extrusion foot 2512 exits from the notch 2551, the notch 2551 is no longer blocked by the extrusion foot 2512. However, at this time, the arc block 254 has moved a certain distance towards the disc 23, and the sliding foot 2542 is no longer located at the notch 2551, but at the end of the limiting groove 255 near the disc 23. As the central sleeve 25 subsequently contracts and changes diameter, the arc plates 252 move closer to the cylinder 251, and the circumferential distance between adjacent arc plates 252 decreases. This causes the limiting groove 255 to move closer to the cylinder 251. As the two limiting grooves 255 come together, the space formed by their combination changes, forcing the sliding foot 2542 to merge along the arc groove 2541 until the two sliding feet 2542 can no longer retract when they are back to back. Then, they slide and reset along the limiting groove 255 in a direction away from the disc 23. When the sliding foot 2542 slides to the notch 2551 at the end of the limiting groove 255 away from the disc 23, the sliding foot 2542 falls back into the notch 2551 and is limited by the notch 2551. The arc block 254 then returns to its initial position, preparing for the next bending process. The triggering of this series of actions depends entirely on the pressure applied to the arc plate 252 during the bending of the steel bar and the reset process after the pressure is removed. No additional external control commands or driving devices are required, thus realizing the automatic correction and alignment of the axial position of the steel bar during the bending process.

[0031] Please see the appendix Figure 3 -Appendix Figure 5 The bending assembly 2 also includes a hydraulic extrusion component 4 disposed above the central sleeve 25. The mounting base 41 of the hydraulic extrusion component 4 is sleeved on the outer wall of the rotating shaft 21 through a bearing and can rotate around the rotating shaft 21. It is locked at any rotation angle by a clamping bolt 43 on the fixing plate on the side of the support frame 1. This rotatable and angle-locked setting is used to accommodate different angles of the pushing position required after the steel bar is bent. At the same time, the output shaft 451 of the hydraulic telescopic rod 45 slides along the second strip groove 44 on the mounting base 41, thereby realizing the position adjustment of the pushing block 46 in both the circumferential and radial dimensions of the rotating shaft 21. The hydraulic extrusion component 4 intervenes when the bending is nearing completion. Its function is to apply pressure to the folded portion formed after bending, so that the folded portion fits tightly with the main body of the steel bar, creating good joint conditions for subsequent welding. During the bending process, when the steel bar is bent to almost a full circle, there is still a certain gap or angle between the folded portion and the main body. At this time, it is difficult to achieve a tight side-by-side fit between the two by relying solely on the unilateral push of the blocking column 24. The hydraulic extrusion component 4 applies pressure to the folded portion from above, and together with the blocking column 24 below, forms an upper and lower clamp, thereby pressing the folded portion towards the main body of the steel bar and eliminating the gap between the two.

[0032] The welding component 3 is movably mounted on the upper end of the support frame 1. The welding component 3 can move back and forth above the two bending components 2. After one bending component 2 completes bending and hydraulic extrusion bonding, the welding component 3 moves to the upper end of the workstation to weld the overlapping bending area. After the welding of this end is completed, the welding component 3 moves to the upper end of another bending component 2 to weld the other end. This layout of sharing a single welding component 3 reduces the number of welding guns 35 and related driving components compared to the scheme of setting a welding component 3 above each bending component, thereby reducing the equipment manufacturing cost and simplifying the complexity of the control system. Furthermore, since the movement of the welding gun 35 is controlled by a servo drive system, its repeatability is sufficient to ensure the uniformity of the weld quality at both ends. The welding torch 35 is located on the same side of the disc 23, keeping the other side of the disc 23 open. When operators perform clamping and unloading operations on this open side, they are not subject to spatial interference from the welding torch 35 and the moving track 31, making clamping and unloading operations convenient. Furthermore, after the reinforcing bar is bent and formed, its annular ring and overlapping weld seam are located on the side of the disc 23 facing the welding assembly 3. The welding torch 35 can directly align with the weld seam without having to go around the disc 23, shortening the movement path and positioning time of the welding torch 35. In addition, the co-side arrangement of the welding torch 35 and the disc 23 ensures that the welding torch 35, the blocking column 24, the pushing block 46, and other actuators are in the same operating space during welding. This facilitates visual confirmation of the clamping state of the overlapping parts of the reinforcing bar before welding and allows for easy adjustment of the welding torch 35's posture during welding, thereby improving the convenience of welding operations and the reliability of welding quality.

[0033] Please see the appendix Figure 1 -Appendix Figure 9 Taking a complete processing procedure as an example, the working principle and operation steps of the tooling of the present invention will be explained in detail.

[0034] In the preparation stage before processing begins: First, according to the diameter specifications of the steel bars to be processed, the operator adjusts the radial position of the blocking column 24 in the first strip groove 231 of the disc 23. During adjustment, the nut 243 at the end of the straight rod 241 of the blocking column 24 is loosened, and the straight rod 241 is slid along the strip groove to the appropriate position. Then, the nut 243 is tightened to lock and fix the blocking column 24. After the position of the blocking column 24 is determined, the outer diameter of the center sleeve 25 is adjusted according to the inner diameter of the ear required for this batch of pull rods. When adjusting the outer diameter of the center sleeve 25, the electric screw 2513 is started. The rotational motion of the electric screw 2513 is converted into the linear motion of the cone 253 along the axial direction of the cylinder 251 through the threaded engagement. When the cone 253 moves towards the disc 23, the conical surface of the cone 253 pushes each connecting rod 257. The connecting rod 257 slides outward along the limiting hole 256 of the cylinder 251, pushing the corresponding arc plate 252 to expand radially synchronously until the center... When the outer diameter of the central sleeve 25 reaches the target value, since each arc plate 252 is evenly distributed on the outer circumference of the cylinder 251 and the cone surface of the truncated cone 253 exerts the same force on each connecting rod 257, the expansion of each arc plate 252 is consistent, ensuring the roundness of the outer contour of the central sleeve 25. After adjustment, the operator places the two ends of the steel bar to be processed into the gap between the central sleeve 25 and the blocking column 24 of the two bending components 2. Since the initial distance between the outer wall of the cylinder 242 of the blocking column 24 and the outer wall of the arc plate 252 of the central sleeve 25 is slightly larger than the diameter of the steel bar, the steel bar is clamped between the two. At the same time, the bar body rests on the disc 23. Using the end face of the disc 23 as the axial positioning reference, the operator needs to ensure that the length of the two ends of the steel bar extending from between the central sleeve 25 and the blocking column 24 meets the process allowance requirements for bending into a ring. This extension length determines the circumference of the ring after bending and the length of the overlapping section.

[0035] Once ready, the bending process begins: At this time, the two first motors 22 on the left and right start simultaneously, but in opposite directions. The left first motor 22 drives the left rotating shaft 21 to rotate clockwise, and the right first motor 22 drives the right rotating shaft 21 to rotate counterclockwise. In this way, the two ends of the steel bar are bent upward and downward respectively to form a symmetrical double-ear structure. Taking one of the bending components 2 as an example, the first motor 22 drives the rotating shaft 21 to rotate through the reducer 221. The rotating shaft 21 drives the disc 23 fixed on it to rotate synchronously. The rotation of the disc 23 drives the blocking column 24 installed on it and the central sleeve 25 sleeved at the end of the rotating shaft 21 to rotate together. The blocking column 24 makes a circular motion around the axis of the central sleeve 25. Since one end of the steel bar is clamped between the blocking column 24 and the central sleeve 25, the movement of the blocking column 24 forces the end of the steel bar to undergo plastic bending around the outer wall of the central sleeve 25. As the rotating shaft 21 continues to rotate, the angle of rotation of the blocking column 24 around the central sleeve 25 gradually increases, and the degree of bending of the steel bar also increases accordingly.

[0036] As the bending angle gradually increases from zero, the reinforcing bar gradually adheres to the outer wall of the central sleeve 25. Since the central sleeve 25 is composed of multiple arc-shaped plates 252 and arc-shaped blocks 254 arranged between adjacent arc-shaped plates 252 to form a complete outer contour, the reinforcing bar first contacts the outer wall surface of the arc-shaped plates 252. As the bending angle further increases, the pressure of the reinforcing bar on the outer wall of the arc-shaped plates 252 gradually increases. In the initial stage of bending, the arc-shaped blocks 254 are in the initial position, that is, the position close to the free end of the central sleeve 25. As the blocking column 24 continues to rotate, when the bending angle approaches a certain set value, the pressure of the reinforcing bar on the arc-shaped plates 252 gradually increases. When the radial pressure of the reinforcing bar reaches a certain level, it directly acts on the extrusion plate 2511 located in the groove 2521 on the outer wall of the arc-shaped plate 252. Under the pressure of the reinforcing bar, the extrusion plate 2511 retracts into the groove 2521, compressing the second spring 2510 located between the extrusion plate 2511 and the bottom of the groove 2521. During the retraction of the extrusion plate 2511, the extrusion feet 2512 at both ends move accordingly. The extrusion feet 2512 enter the notch 2551 at the end of the limiting inclined groove 255, pushing out the sliding foot 2542 located in the notch 2551, thus causing the sliding foot 2542 to lose its position in the notch 2551. The constraint in the middle, at this time the first spring 259 set in the limiting inclined groove 255 begins to play its role. The first spring 259 releases its elastic force, pushing the sliding foot 2542 to slide along the limiting inclined groove 255 towards the disk 23. Since the sliding foot 2542 is fixedly connected to the arc block 254, the sliding of the sliding foot 2542 drives the arc block 254 to move towards the disk 23 as a whole. During the process of the arc block 254 moving towards the disk 23, its outer wall pushes the steel bar that is already attached to the outer wall of the central sleeve 25, so that the bent part of the steel bar also moves towards the disk 23. This process continuously pushes the steel bar towards the end face of the disk 23. The pushing action ensures that the reinforcing bar remains in close contact with the axial reference plane of the disc 23 throughout the bending process, thus completely eliminating bending distortion caused by the axial movement of the reinforcing bar. It should be noted that the design of the limiting groove 255 makes the relative distance between the two sliding feet 2542 decrease as the groove width gradually decreases when the sliding foot 2542 moves towards the disc 23. This matches the geometric relationship of the decrease in circumferential spacing between adjacent arc plates 252 when the arc block 254 approaches the disc 23, ensuring the stability of the arc block 254 during movement and the continuity of the support for the reinforcing bar achieved by the adjacent arc plates 252.

[0037] When the rotation angle of the shaft 21 approaches a full circle, the folded-back portion of the reinforcing bar is basically parallel to the main body of the rod. However, due to the elastic recovery of the reinforcing bar, there may still be a certain small gap or angular deviation between them. At this time, the hydraulic extrusion component 4, located above or below the central sleeve 25, is activated, and the hydraulic telescopic rod 45 extends, pushing the push block 46 at its output end downward or upward. When moving upward, the lower surface of the push block 46 is set in an arc shape, and the curvature of this arc surface matches the outer diameter of the bent annular ring, ensuring that the push block 46 can form a good surface contact with the surface of the reinforcing bar, avoiding surface defects caused by point contact or line contact. When local indentation or stress concentration occurs, the pushing block 46 contacts and presses down on the folded portion of the reinforcing bar from above, while the blocking column 24 provides support to the main body of the rod from below or the side. Together, they press the folded portion tightly against the main body of the rod. Simultaneously, because the cross-sectional area of ​​the pushing block 46 gradually increases along the direction away from the disc 23 (i.e., the outer portion of the pushing block 46 is thicker in the height direction), during the downward pressing process, its thicker outer portion will first contact the outer end of the folded portion. As the hydraulic telescopic rod 45 continues to extend, the pushing block 46 generates a horizontal thrust on the folded portion, with this horizontal component pointing towards the disc 23. This horizontal thrust, combined with the pushing action of the arc-shaped block 254 towards the disc 23, achieves complete alignment and tight contact between the folded portion and the main body of the rod in both the axial and circumferential directions.

[0038] After the hydraulic extrusion component 4 is pressed and bonded, the welding assembly 3 begins to work: the moving seat 32 of the welding assembly 3 slides along the moving track 31 at the upper end of the support frame 1, transporting the welding torch 35 to the current bending assembly 2 position. After the moving seat 32 reaches the predetermined position, the lifting seat 33 adjusts the height of the welding torch 35 in the vertical direction, so that the electrode or welding wire end of the welding torch 35 is aligned with the starting point of the weld at the bend overlap. The rotating seat 34 is used to adjust the tilt angle of the welding torch 35, so that the welding torch 35 points to the weld at a suitable angle to ensure the directionality of the arc and the forming quality of the molten pool during welding. After the welding torch 35 is in place, the welding power supply is turned on, and the welding torch 35 moves along the weld direction at the bend overlap to continuously weld the joint between the folded part and the rod body. Since the welding torch 35 does not need to bear a large reaction force during the welding process, the traveling mechanism of the moving seat 32 can be driven by a servo motor in conjunction with a gear rack or ball screw to ensure the uniformity of the welding speed and the straightness of the weld trajectory.

[0039] After welding is completed at one station of bending component 2, the welding torch 35 is lifted, and the moving seat 32 slides along the moving track 31 to above another bending component 2, where the same welding operation is performed on the overlapping bend at the other end. After welding at both stations is completed, the unloading stage begins.

[0040] During unloading, the electric screw 2513 is first reversed. The reverse rotation of the electric screw 2513 causes the cone 253 to move axially away from the disc 23. After the cone 253 removes the radial support force on the connecting rod 257, the third spring 258 sleeved on each connecting rod 257 begins to release its elastic force. One end of the third spring 258 abuts against the arc plate 252, and the other end abuts against the outer wall of the cylinder 251. Its elastic force is directed to pull the arc plate 252 toward the cylinder 251. Under the action of the third spring 258, each connecting rod 257 slides along the limiting hole 256 toward the inside of the cylinder 251, causing each arc plate 252 to contract radially in sync. This reduces the overall outer diameter of the central sleeve 25. After the outer diameter of the central sleeve 25 decreases, a gap is created between the inner wall of the bent steel bar ring and the outer wall of the arc plate 252, releasing the tension between them and allowing the steel bar to easily come off the central sleeve 25.

[0041] During the retraction of the central sleeve 25, as each arc-shaped plate 252 moves closer to the cylinder 251, the circumferential distance between adjacent arc-shaped plates 252 decreases. The extrusion plate 2511, which was originally squeezed inward by the arc-shaped plates 252, is driven to reset by the second spring 2510 after losing external pressure. The reset of the extrusion plate 2511 causes the extrusion feet 2512 at both ends to retract and push out the notch 2551 at the end of the limiting groove 255. At the same time, as the arc-shaped plates 252 retract radially, the limiting grooves 255 on two adjacent arc-shaped plates 252 move closer to each other, and the two are combined to form a trapezoidal space that is wider at the top and narrower at the bottom. At this time, the two sliding feet 2542 on the arc-shaped block 254 overcome the first... With the continuous pushing of a spring 259, the slide is moved away from the disk 23 along the limiting groove 255. As the width of the limiting groove 255 gradually increases away from the disk 23, the two sliding feet 2542 move towards the middle and merge together. Then they move outward along the limiting groove 255 together. Finally, the two sliding feet 2542 slide into the notch 2551 at the end of the limiting groove 255 and are positioned there. The arc block 254 is then reset to its initial position. At this point, the outer diameter of the entire central sleeve 25 has been reduced to its minimum state, and the arc block 254 has also been reset, making enough space for the operator to remove the pull bar, which has been welded at both ends, from the tooling, thus completing a complete processing cycle.

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

Claims

1. A welding and manufacturing fixture for iron accessories on utility poles, characterized in that, Includes a support frame (1), on which two bending components (2) are arranged side by side, and a welding component (3) is arranged above the two bending components (2). The bending assembly (2) includes a rotating shaft (21) rotatably mounted on the support frame (1), a first motor (22) driving the rotating shaft (21) to rotate, a disc (23) sleeved on the rotating shaft (21), an adjustable stop post (24) disposed on the disc (23), and a variable diameter central sleeve (25) sleeved on the end of the rotating shaft (21). The central sleeve (25) includes a cylindrical body (251), a plurality of arc-shaped plates (252) disposed on the outer periphery of the cylindrical body (251), and a central sleeve (252) disposed on the outer periphery of the cylindrical body (251). The cone (253) inside the cylinder (251) drives each of the arc plates (252) to extend and retract, and the arc blocks (254) are slidably arranged between adjacent arc plates (252). The arc blocks (254) and adjacent arc plates (252) are slidably engaged through limiting grooves (255). The bending assembly (2) also includes a hydraulic extrusion component (4) arranged above the central sleeve (25). The welding assembly (3) is movably arranged on the upper end of the support frame (1).

2. The welding manufacturing fixture for iron accessories of utility poles according to claim 1, characterized in that, The blocking post (24) includes a straight rod (241) and a cylinder (242) disposed at one end of the straight rod (241). A first strip groove (231) is provided on the disc (23) along its radial direction. The straight rod (241) passes through the first strip groove (231). A nut (243) is screwed to one end of the straight rod (241) that passes through the first strip groove (231).

3. The welding manufacturing fixture for iron accessories of utility poles according to claim 1, characterized in that, The outer wall of the cylinder (251) of the central sleeve (25) is provided with a plurality of limiting holes (256) at equal intervals. Each of the arc plates (252) and the cylinder (251) is provided with a connecting rod (257). Each connecting rod (257) passes through the corresponding limiting hole (256). Each connecting rod (257) is provided with a third spring (258). One end of the third spring (258) abuts against the corresponding arc plate (252), and the other end of the third spring (258) abuts against the outer wall of the cylinder (251).

4. The welding manufacturing fixture for iron accessories of utility poles according to claim 1, characterized in that, Each of the arc-shaped plates (252) has a limiting groove (255) on its side facing the adjacent arc-shaped plate (252). An arc-shaped groove (2541) is provided on the arc-shaped block (254). Two sliding feet (2542) are slidably arranged in the arc-shaped groove (2541). The two sliding feet (2542) are slidably engaged with the limiting grooves (255) on the two adjacent arc-shaped plates (252).

5. The welding manufacturing fixture for utility pole iron accessories according to claim 4, characterized in that, Each of the limiting grooves (255) gradually increases in width along the direction away from the disk (23). Each of the limiting grooves (255) has a notch (2551) at one end away from the disk (23). Each of the limiting grooves (255) is provided with a first spring (259), which is used to push the sliding foot (2542) to move towards the disk (23).

6. The welding manufacturing fixture for utility pole iron accessories according to claim 5, characterized in that, Each of the arc-shaped plates (252) has a groove (2521) on its outer wall. A pressing plate (2511) is provided in the groove (2521). A second spring (2510) is provided between the pressing plate (2511) and the bottom of the groove (2521). Pressing feet (2512) are provided on both sides of one end of the pressing plate (2511). Each pressing foot (2512) is opposite to the corresponding notch (2551) and is used to push out the sliding foot (2542) located in the notch (2551).

7. The welding manufacturing fixture for utility pole iron accessories according to claim 1, characterized in that, The rotating shaft (21) is mounted on the support frame (1) through a bearing seat (211). One end of the rotating shaft (21) is connected to the first motor (22) through a reducer (221). The first motor (22) is located on one side of the support frame (1).

8. The welding manufacturing fixture for iron accessories of utility poles according to claim 1, characterized in that, The hydraulic extrusion component (4) also includes a mounting base (41), which is sleeved on the outer wall of the rotating shaft (21) through a bearing. A clamping bolt (43) is provided on the side of the mounting base (41). A second strip groove (44) is provided on the mounting base (41). A hydraulic telescopic rod (45) is installed upside down on the mounting base (41). The output shaft (451) of the hydraulic telescopic rod (45) is slidably disposed in the second strip groove (44).

9. The welding manufacturing fixture for iron accessories of utility poles according to claim 8, characterized in that, The output end of the hydraulic telescopic rod (45) is provided with a push block (46), the lower surface of the push block (46) is an arc surface, and the cross-sectional area of ​​the push block (46) gradually increases along the direction away from the disk (23).

10. The welding manufacturing fixture for iron accessories of utility poles according to claim 1, characterized in that, The welding assembly (3) includes a moving track (31) disposed on the upper end of the support frame (1), a moving seat (32) is slidably disposed on the moving track (31), a lifting seat (33) is disposed on the moving seat (32), a rotating seat (34) is disposed on the lifting seat (33), a welding torch (35) is mounted on the rotating seat (34), and the welding torch (35) is located above the disc (23) and on the same side as the disc (23).

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