Welding fixture for manufacturing building foundation column reinforcing steel bars

Abstract

The invention relates to the technical field of reinforcing steel bar welding, in particular to a welding clamp for building foundation column reinforcing steel bar manufacturing, which comprises a butt joint unit, a clamping unit and alignment units in one-to-one correspondence with screw rod groups, the butt joint unit comprises two screw rod groups which are arranged up and down, and a clamping head is arranged on the lower screw rod group. Through organic cooperative combination of a plurality of key components such as the alignment unit, the clamping unit, the correction set, the pressing set and the adjusting set, integrated control over multiple functions such as accurate longitudinal rib alignment, dynamic vertical correction, continuous stable vertical pressing and end close attachment of the reinforcing steel bars is achieved; the key technical problems of longitudinal rib dislocation, clamping deflection, poor attachment and the like of a reinforcing steel bar welding clamp in the prior art are solved, the welding quality of reinforcing steel bars is ensured, and the portability and the on-site construction flexibility of the welding clamp are still kept.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar welding, in particular to a welding fixture for manufacturing steel bars of building foundation columns. Background Art

[0002] The steel cage in a building's foundation column structure is typically constructed by binding or welding longitudinal main bars and stirrups. The longitudinal main bars are the core load-bearing components, carrying loads and ensuring the quality of their connections directly impacts the overall stability of the building. The longitudinal main bars are typically ribbed steel bars with two symmetrical raised longitudinal ribs and several transverse ribs. During the construction of building foundation columns, electroslag pressure welding is typically used to butt-weld the longitudinal main bars on-site to create the desired length. This process uses an electric current to melt the ends of the bars, forming a weld under axial pressure. This process offers the advantages of high strength and low cost.

[0003] In order to adapt to the flexibility of on-site construction, portable welding equipment is widely used. The core components of this equipment include a portable welding power source and a special clamp, wherein the clamp mainly includes a movable clamp arm and a fixed clamp arm arranged up and down, and corresponding V-shaped clamps installed on the two clamp arms. When fixing the steel bars, the first steel bar that is embedded or fixed in the foundation pedestal is used as the basis, and the steel bar is placed in the fixed clamp arm and the corresponding V-shaped clamp plate, and the clamping head of the fixed clamp arm and the corresponding V-shaped clamp plate cooperate to clamp and fix the steel bar. Then, the steel bar to be welded is placed in the movable clamp arm and the corresponding V-shaped clamp plate. After the operator aligns the end of the steel bar to be welded with the end of the steel bar below, the clamping head of the movable clamp arm and the corresponding V-shaped clamp plate are driven to cooperate to clamp and fix the steel bar to be welded, and then welding begins. During welding, the movable clamp arm and the V-shaped clamp plate are controlled to press the steel bar to be welded downward, so that a dense and strong weld joint is formed between the two sections of steel bars. Repeat the above process and weld the subsequent steel bars upward in sequence.

[0004] As can be seen from the above, the welding clamp is used to clamp the free end of the steel bar fixed at one end, but the following problems exist during the clamping operation: 1. The existing clamp cannot accurately align the longitudinal ribs of the two sections of steel bars, and only relies on the operator to manually adjust the position of the longitudinal ribs. There is a high probability of misalignment between the longitudinal ribs of the two sections of steel bars, which reduces the effective cross-sectional area at the welding head, thereby reducing the weld quality of the steel bar, and the longitudinal rib position cannot be continuously constrained during welding; 2. Because the clamping position of the steel bar to be welded is usually close to its welding end, the overhang length of the steel bar to be welded is long, resulting in the deviation of the center of gravity of the steel bar to be welded, and there is a tendency for cantilever deflection. Especially when the aspect ratio (ratio of length to diameter) of the steel bar to be welded is large, the clamping position of the steel bar to be welded will generate a large overturning moment, the clamping stability is reduced and axial tilt is more likely to occur, the welding end faces of the two sections of steel bars cannot be effectively and evenly fitted, and the steel bar welding quality is reduced. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a welding fixture for the production of building foundation column steel bars, including a docking unit, the docking unit including two screw groups arranged up and down, and a clamping head provided on the lower screw group; the welding fixture for the production of building foundation column steel bars also includes: a clamping unit, including an arc-shaped plate connected to the upper screw group through an elastic telescopic rod, a transmission plate is provided for sliding left and right outside the fixed section of the elastic telescopic rod, a calibration group is provided on the right side of the transmission plate, and a pressing group is connected between the arc-shaped plate and the transmission plate; a positioning unit corresponding to the screw group one by one, including a clamping plate provided on the docking unit, a V-shaped clamping groove is provided in the middle of the left end of the clamping plate, Both inner walls of the clamping groove are provided with linear array alignment plates, and an adjustment group for adjusting the left and right positions of the alignment plates is installed between the multiple alignment plates and the clamping plates; the correction group includes inclined plates and correction rollers arranged symmetrically above and below, and the inclined plates are hinged by a torsion spring shaft and generate bidirectional pressure; with the lower steel bar in a fixed state as the reference, the arc plate and the clamping groove cooperate to clamp the upper steel bar while the alignment plate presses against the right end of the longitudinal rib of the corresponding steel bar, automatically aligning the longitudinal ribs of the two sections of steel bars up and down, and then the transmission plate moves right to control the correction roller to press the upper steel bar to make it vertically centered, and at the same time the transmission plate drives the pressing group to press down the transverse ribs of the upper steel bar, so that the ends of the two sections of steel bars fit tightly and evenly.

[0006] Preferably, the clamping plate is provided with square holes corresponding to the alignment plates one by one, the adjustment group includes a sliding rod installed in the square hole for sliding left and right, the alignment plate is installed on the side of the sliding rod close to the middle of the clamping plate for sliding back and forth through a top spring, and multiple sliding rods arranged up and down are commonly fixed with a synchronization rod on the side away from the middle of the clamping plate, and the right ends of the two synchronization rods corresponding to the same clamping plate are commonly fixed with a U-shaped adjustment plate.

[0007] Preferably, the adjustment plate and a plurality of limit rods fixedly mounted on the right end of the clamping plate are slidably connected left and right, an adjustment screw is threadedly connected to the adjustment plate, and the left end of the adjustment screw is rotatably mounted on the middle of the right end of the clamping plate.

[0008] Preferably, the inclined plate is hinged to the right end of the transmission plate through a torsion spring shaft, the right ends of the two inclined plates are arranged tilted away from each other, the arc plate is located between the two inclined plates, and the alignment roller is rotatably installed on the right end of the inclined plate.

[0009] Preferably, a mounting groove is provided in the middle of the right side of the arc surface of the arc plate, the pressing group includes a sliding plate slidably installed in the mounting groove, and a plurality of evenly arranged pressing blocks are fixedly installed on the right side of the sliding plate.

[0010] Preferably, a plurality of guide rods evenly arranged front and back are installed on the sliding plate so as to pass through and slide up and down, and the guide rods are installed in the installation groove so as to slide left and right. A return spring is provided between the lower end of the sliding plate and a circular plate fixedly sleeved on the outer side of the lower end of the guide rod.

[0011] Preferably, guide blocks are fixedly installed at both ends of the sliding plate, and guide grooves are opened on the front and rear inner walls of the installation groove. The upper end of the guide groove is arranged to be tilted to the left and the lower end is arranged vertically, and the guide blocks are slidably installed in the corresponding guide grooves.

[0012] Preferably, two L-shaped lower pressure rods are fixedly installed on the left end of the sliding plate and are arranged symmetrically front and back. The horizontal section of the L-shaped lower pressure rod slides through the curved surface on the left side of the curved plate. A lower pressure plate corresponding to the L-shaped lower pressure rod is installed on the transmission plate and slides left and right. A square plate is fixedly installed on the left end of the lower pressure plate, and a pressure spring is connected between the square plate and the left end of the transmission plate. The lower side of the right end of the lower pressure plate is set to an inclined surface that matches the corresponding L-shaped vertical section of the lower pressure rod.

[0013] Preferably, the fixed section of the elastic telescopic rod is equipped with two locking groups arranged on the left and right, and the locking groups include a plurality of circumferentially evenly arranged elastic locking rods that penetrate and radially slide and are installed on the outside of the fixed section of the elastic telescopic rod. Locking holes are opened at positions corresponding to the elastic locking rods on the outside of the telescopic section of the elastic telescopic rod.

[0014] Preferably, matching blocks corresponding to the elastic locking rods are installed at both left and right ends of the transmission plate, and one end of the matching block away from the transmission plate is set as an inclined surface matching the corresponding elastic locking rod.

[0015] The beneficial effects of the present invention are: 1. The present invention is based on the requirement of vertically overlapping the steel bars to be welded to the upper ends of the fixed steel bars. When the two sections of steel bars are clamped and fixed in the clamping grooves of the corresponding clamping plates, the right ends of the longitudinal ribs of the steel bars are abutted by the positioning plates, thereby automatically positioning the longitudinal ribs of the upper and lower sections of steel bars, so that the longitudinal ribs of the upper and lower sections of steel bars are vertically aligned, thereby preventing the problem of reduced effective cross-sectional area at the welding joint due to misaligned welding of the longitudinal ribs of the two sections of steel bars, thereby ensuring the welding quality of the steel bars and thus ensuring the overall strength of the steel bars after welding.

[0016] 2. The present invention realizes vertical correction of the upper steel bars by implementing symmetrical upper and lower pressure through the correction group, thereby preventing the upper steel bars from being slightly deflected. At the same time, the pressure points are evenly distributed on the upper and lower sides of the clamping position, and the uppermost pressure point is away from the welding end of the upper steel bar. By balancing the force on the upper steel bars, the overturning moment generated by the external force on the clamping position of the upper steel bars is reduced, and the cantilever deflection is effectively prevented, thereby ensuring that steel bars with a larger aspect ratio are still in a vertical and stable clamping state, ensuring that the two steel bar ends are tightly and evenly fitted, thereby further improving the welding quality of the steel bars.

[0017] 3. The present invention realizes linkage fixation through the symmetrical pressure of the alignment group and the pressing of the downward pressure group, thereby enhancing the clamping stability of the steel bars, and then ensuring that the ends of the two sections of steel bars are stably aligned and tightly fitted. Combined with the longitudinal rib alignment and positioning achieved by the V-shaped clamping groove and the alignment plate during the clamping and fixation period, as well as the adjustment of the alignment plate position achieved by the adjustment group, a highly integrated, automated welding fixture system suitable for straight steel bars of various diameters is formed, while retaining the system's on-site portability and flexible construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention at a first viewing angle.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention at a second viewing angle.

[0021] Figure 3 It is a cross-sectional view of the clamping plate, the limiting rod, the adjusting screw, the adjusting plate and the sliding rod of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressing group, the alignment group and the curved plate of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the guide block, the sliding plate, the guide groove and the L-shaped pressing rod of the present invention.

[0024] Figure 6 It is a three-dimensional structural diagram of the transmission plate, the lower pressure plate, the square plate, the pressure spring and the matching block of the present invention.

[0025] Figure 7 It is a cross-sectional view of the transmission plate, the matching block and the elastic locking rod of the present invention.

[0026] Figure 8 It is a schematic structural diagram of the curved plate and the corresponding clamping plate of the present invention clamping the upper steel bar from a top view.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of ribbed steel bars.

[0028] Figure 1: Docking unit; 11: Screw group; 111: Fixed sleeve; 112: Threaded rod 1; 12: Clamping head; 13: Reference plate; 14: Round rod; 15: Pressurizing group; 151: Transmission member; 152: Control handle; 153: Lifting handle; 154: Threaded rod 2; 16: Movable plate; 2: Clamping unit; 21: Elastic telescopic rod; 22: Curved plate; 221: Guide groove; 23: Electric slider assembly; 24: Transmission plate; 241: Lower pressure plate; 242: Square plate; 243: Pressurized spring Spring; 244, matching block; 25, calibration group; 251, inclined plate; 252, calibration roller; 26, pressing group; 261, sliding plate; 262, pressing block; 263, guide rod; 264, return spring; 265, guide block; 266, L-shaped pressing rod; 27, elastic locking rod; 3, alignment unit; 31, clamping plate; 32, alignment plate; 33, adjustment group; 331, sliding rod; 332, extension spring; 333, synchronization rod; 334, adjustment plate; 335, limit rod; 336, adjustment screw. DETAILED DESCRIPTION

[0029] The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product instructions shall be followed.

[0030] See Figure 1 、 Figure 2 and Figure 9 A welding fixture for making steel bars of building foundation columns includes a docking unit 1. The docking unit 1 includes two screw groups 11 arranged upper and lower. The lower screw group 11 is provided with a clamping head 12, and the upper screw group 11 is provided with a clamping unit 2. The docking unit 1 is provided with a positioning unit 3 corresponding one to one with the screw group 11.

[0031] It should be noted that the docking unit 1 adopts the existing technology as a whole; the docking unit 1 also includes a reference plate 13, and a pressure group 15 is provided on the upper end of the reference plate 13 through two round rods 14 arranged on the left and right. A movable plate 16 is installed on the two round rods 14 for sliding up and down together, and the movable plate 16 is located between the pressure group 15 and the reference plate 13; the screw group 11 includes a fixed sleeve 111 and a threaded rod 112, and the upper and lower fixed sleeves 111 are fixedly installed on the reference plate 13 and the movable plate 16 respectively, and the threaded rod 112 is connected to the fixed sleeve 111 through threaded cooperation (not shown in the figure), and the clamping head 12 is fixedly installed on the right end of the lower threaded rod 112, the clamping unit 2 is connected to the upper threaded rod 112, and the two alignment units 3 are respectively arranged on the reference plate 13 and the movable plate 16.

[0032] It should be noted that the pressurizing group 15 includes a transmission member 151 arranged at the upper ends of the two round rods 14, and a control handle 152 is provided on the transmission member 151. A lifting handle 153 is also rotatably installed on the transmission member 151. The transmission member 151 is threadedly connected to the movable plate 16 through the second threaded rod 154, wherein the second threaded rod 154 is threadedly connected to the movable plate 16 and rotatably connected to the transmission member 151. When the operator rotates the control handle 152, the control handle 152 drives the second threaded rod 154 to rotate through the transmission member 151, so that the second threaded rod 154 drives the movable plate 16 to move up and down.

[0033] The present invention is based on a construction scenario in which steel bars are vertically overlapped layer by layer to the upper end of a fixed vertical steel bar and welded on site. It has high portability and operational flexibility, can be quickly moved to the next welding position and adapted to different steel bar diameters and welding heights, does not require large mechanical structures or equipment support and does not rely on a fixed welding platform, and the work location is not fixed. The present invention not only clamps and fixes the two sections of steel bars arranged up and down, but also positions the longitudinal ribs of the two sections of steel bars, ensuring that the longitudinal ribs of the two sections of steel bars are vertically aligned, preventing the longitudinal ribs of the two sections of steel bars from being misaligned and welding, resulting in a reduction in the effective cross-sectional area at the joint, ensuring the quality of the steel bar welds, and thus ensuring the overall strength of the steel bars after welding. The present invention can also calibrate the upper steel bar to arrange it vertically, and make the welded end of the upper steel bar and the welded end of the lower steel bar fit tightly and evenly during welding, further ensuring the quality of the steel bar welds. The present invention optimizes the structure and function of the three-dimensional structural characteristics of the steel bar, rather than plane structure welding.

[0034] Specifically, first, based on the first steel bar (lower steel bar) embedded or fixed in the foundation pedestal (or lower structure), the operator moves the positioning unit 3 located below to the position corresponding to the lower steel bar to be welded by pulling the handle 153, and makes the lower steel bar located in the positioning unit 3 below. Then, the operator manually screws the lower threaded rod 112 to drive the clamping head 12 and the lower positioning unit 3 to cooperate in clamping and fixing the lower steel bar. Then, the operator places the upper steel bar in the positioning unit 3 above. Finally, the operator manually screws the upper threaded rod 112 to drive the clamping unit 2 and the positioning unit 3 to cooperate in clamping and fixing the upper steel bar. The positioning unit 3 positions the longitudinal ribs of the corresponding steel bar so that the longitudinal ribs of the upper and lower sections of steel bars are aligned up and down.

[0035] The clamping unit 2 is controlled to vertically calibrate the steel bars to ensure that the steel bars are arranged vertically axially. At the same time, the clamping unit 2 can also drive the lower end of the upper steel bar to elastically press against the upper end of the lower steel bar to ensure that the welding surfaces of the upper and lower steel bars are tightly and evenly fitted. Then the operator installs a flux box (not shown in the figure) at the welding point of the two steel bars and adds flux. Then the pressure group 15 is controlled to move the movable plate 16 slightly upward so that there is a small gap between the ends of the upper and lower steel bars. Then the two steel bars are energized to generate an arc through the gap at the ends of the steel bars. The heat from the arc melts the flux to form high-temperature slag. As heating continues, the ends of the steel bars are gradually melted. Then the pressure group 15 is controlled to move the movable plate 16 downward, and finally the clamped upper steel bar is driven to rigidly press downward on the upper end of the lower steel bar, squeezing out the molten metal and slag, so that the steel bars at both ends are tightly combined to form a weld joint, thus completing the welding of the two steel bars. When the steel bar welding is completed, remove the welding box, manually screw the lower threaded rod 112 so that the corresponding clamping head 12 no longer cooperates with the lower positioning unit 3 to clamp the lower steel bar, manually screw the upper threaded rod 112 so that the corresponding clamping unit 2 no longer cooperates with the positioning unit 3 to clamp the upper steel bar, then move the welding equipment to the next welding position, and use the previously welded steel bar as the new "lower steel bar", that is, the fixed foundation, and then repeat the above process to weld the subsequent steel bars upward in sequence.

[0036] See Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 8 The clamping unit 2 includes a curved plate 22 arranged at the right end of the upper threaded rod 112 through an elastic telescopic rod 21. The left end of the elastic telescopic rod 21 is rotatably connected to the right end of the upper threaded rod 112, and the left end of the elastic telescopic rod 21 is equipped with a symmetrical guide rod that is slidably connected to the fixed sleeve 111. A transmission plate 24 is provided on the outside of the fixed section of the elastic telescopic rod 21 through an electric slider assembly 23 that slides left and right. The transmission plate 24 is located on the left side of the curved plate 22, and a calibration group 25 is provided at the right end of the transmission plate 24. A pressing group 26 is connected between the curved plate 22 and the transmission plate 24; the fixed section of the elastic telescopic rod 21 is equipped with two locking groups arranged left and right.

[0037] See Figure 1 、 Figure 2 and Figure 3 The alignment unit 3 includes a clamping plate 31. A plurality of connecting rods are commonly connected between the upper clamping plate 31 and the movable plate 16, and between the lower clamping plate 31 and the reference plate 13. A V-shaped clamping groove is opened in the middle of the left end of the clamping plate 31. The two inner side walls of the clamping groove are provided with a plurality of alignment plates 32 evenly arranged up and down. An adjustment group 33 for adjusting the left and right positions of the alignment plates 32 is commonly installed between the plurality of alignment plates 32 and the clamping plate 31.

[0038] See Figures 1 to 9 When the upper bar is in the position where the lower bar is located, the operator moves the clamping plate 31 by pulling the handle 153 so that the lower bar is centered in the clamping groove of the clamping plate 31 and the longitudinal ribs of the lower bar are aligned with the corresponding multiple alignment plates 32 arranged above and below. Then, the operator manually screws the threaded rod 112 below to drive the clamping head 12 and the clamping groove of the lower clamping plate 31 to cooperate with each other to clamp and fix the lower bar, and the alignment plate 32 corresponding to the lower clamping plate 31 contacts the right end of the longitudinal rib of the lower bar, thereby clamping and fixing the lower bar and positioning its longitudinal ribs at the same time.

[0039] When the upper steel bar is placed in the clamping groove of the upper clamping plate 31, the upper steel bar is manually rotated so that its longitudinal ribs are aligned with the corresponding multiple alignment plates 32 arranged above and below, and then the upper threaded rod 112 is manually screwed. Under the limiting and guiding action of the guide rod, the elastic telescopic rod 21 only moves linearly under the drive of the upper threaded rod 112. The elastic telescopic rod 21 drives the arc plate 22 and the clamping groove of the upper clamping plate 31 to cooperate to clamp and fix the upper steel bar, and the alignment plate 32 corresponding to the upper clamping plate 31 contacts the right end of the longitudinal rib of the upper steel bar (such as Figure 8 As shown, this clamping mechanism simultaneously secures the upper rebar and positions its longitudinal ribs, ensuring vertical alignment of the longitudinal ribs of the upper and lower sections. This prevents misaligned welding of the longitudinal ribs of the two sections, which would reduce the effective cross-sectional area of ​​the joint and thus ensure the quality of the rebar weld. The present invention utilizes the clamping head 12, curved plate 22, clamping groove, alignment plate 32, and adjustment group 33 to form a directional positioning system based on the structural characteristics of the rebar, rather than a simple centering structure. This directional positioning system achieves precise positioning and vertical alignment of the rebar longitudinal ribs.

[0040] When the upper bar is clamped and fixed, the electric slider assembly 23 is controlled to drive the transmission plate 24 to move right to the right limit position, so that the upper bar can be quickly constructed on site. The transmission plate 24 drives the pressing group 26 to elastically press down the upper steel bar so that its lower end and the upper end of the lower steel bar fit tightly and evenly. When the transmission plate 24 moves to the right limit position, the right locking group locks the telescopic section of the elastic telescopic rod 21, realizing the switch between elastic clamping and rigid clamping, so that the clamped steel bar is now stably arranged vertically and its lower end and the upper end of the lower steel bar fit tightly and evenly. At the same time, the locking group controls the clamping state and provides a rigid foundation for the top pressure welding of the pressure group 15. When the steel bar welding is completed, the electric slider assembly 23 is controlled to drive the transmission plate 24 to move left to the left limit position, and the transmission plate 24 drives the alignment group 25 and the pressing group 26 to return to their initial positions.

[0041] See Figure 2 、 Figure 3 and Figure 8 The cam 332 is pressed against the top of the cam 333 to push the cam 334 away from the top of the cam 333 and the cam 335 is pressed against the top of the cam 333 to push the cam 334 to the bottom of the cam 333.

[0042] The adjustment group 33 is used to adjust the left and right positions of the alignment plate 32; specifically, by screwing the adjustment screw 336, the adjustment plate 334 is moved left and right under the action of the limit rod 335, and the adjustment plate 334 drives the alignment plate 32 to move left and right through the synchronization rod 333 and the sliding rod 331 to adjust the left and right positions of the alignment plate 32. When the steel bar is placed in the clamping groove of the clamping plate 31 and the steel bar does not hit the inner wall of the clamping groove, the alignment plate 32 is pressed against the outer side of the steel bar under the action of the extension spring 332, and the alignment plate 32 will move away from the steel bar under the action of the curved surface of the steel bar. When the steel bar hits the inner wall of the clamping groove, the alignment plate 32 hits the right end of the longitudinal rib of the corresponding steel bar (such as Figure 8 As shown); when clamping and fixing steel bars of different diameters, by adjusting the left and right positions of the alignment plate 32, it can be ensured that the alignment plate 32 can always contact the right end of the longitudinal rib of the corresponding steel bar, thereby clamping and fixing steel bars of different sizes while positioning their longitudinal ribs.

[0043] See Figure 5 、 Figure 6 and Figure 7 The locking group includes a plurality of circumferentially evenly arranged elastic locking rods 27 that penetrate and radially slide on the outside of the fixed section of the elastic telescopic rod 21. Locking holes are provided on the outside of the telescopic section of the elastic telescopic rod 21 and at positions corresponding to the elastic locking rods 27; matching blocks 244 are installed on the left and right ends of the transmission plate 24 and at positions corresponding to the elastic locking rods 27. The end of the matching block 244 away from the transmission plate 24 is set to an inclined surface that matches the corresponding elastic locking rod 27, and the end of the elastic locking rod 27 that matches the inclined surface of the matching block 244 is semi-spherical.

[0044] The locking group is used to lock the telescopic section of the elastic telescopic rod 21; specifically, initially, the transmission plate 24 is located at the left extreme position. At this time, the plane of the matching block 244 at the left end of the transmission plate 24 presses the corresponding elastic locking rod 27, and the corresponding elastic locking rod 27 is inserted into the corresponding locking hole and accumulates rebound force to achieve the locking of the telescopic section of the elastic telescopic rod 21. When the transmission plate 24 moves from the left extreme position to the right extreme position, the matching block 244 at the left end of the transmission plate 24 gradually separates from the corresponding elastic locking rod 27. After complete separation, the elastic locking rod 27 moves out of the locking hole under the action of its own rebound force, thereby releasing the elastic telescopic rod 21. To lock the telescopic section, when the inclined surface of the matching block 244 at the right end of the transmission plate 24 contacts the corresponding elastic locking rod 27, and the transmission plate 24 continues to move to the right, the inclined surface of the matching block 244 will push the corresponding elastic locking rod 27 to insert into the corresponding locking hole, thereby locking the telescopic section of the elastic telescopic rod 21 again. When the transmission plate 24 is at the right extreme position, the plane of the matching block 244 at the right end of the transmission plate 24 presses the corresponding elastic locking rod 27, and the elastic locking rod 27 remains inserted into the corresponding locking hole. Only when the transmission plate 24 is at the left and right extreme positions, the elastic locking rod 27 is inserted into the corresponding locking hole to lock the telescopic section of the elastic telescopic rod 21.

[0045] See Figure 2 and Figure 4 The calibration group 25 includes two symmetrically arranged inclined plates 251 hinged to the right end of the transmission plate 24 through a torsion spring shaft. The right ends of the two inclined plates 251 are tilted away from each other. The arc plate 22 is located between the two inclined plates 251. A calibration roller 252 is rotatably installed on the right end of the inclined plate 251, and the torsion spring shaft is provided with a large elastic force.

[0046] The calibration group 25 is used to calibrate the steel bars vertically; specifically, the aforementioned longitudinal ribs of the alignment plate 32 provide a reference for the vertical calibration of the calibration rollers 252. Under this reference, when the telescopic section of the elastic telescopic rod 21 is in an unlocked state and the transmission plate 24 continues to move to the right extreme position, the clamping grooves of the curved plate 22 and the upper clamping plate 31 cooperate to elastically clamp the upper steel bars, and the transmission plate 24 drives the calibration rollers 252 to press against the steel bars through the inclined plate 251. The pressing positions are symmetrically distributed above and below about the clamping positions of the curved plate 22. As the transmission plate 24 continues to move, under the action of the torsion spring shaft, the inclined plate 251 drives the two calibration rollers 252 to move away from each other. The calibration rollers 252 still press against the steel bars under the rebound force of the torsion spring shaft, and finally the upper steel bars are It is tightly against the clamping groove of the clamping plate 31 and makes the steel bar vertical, avoiding the overhang length of the upper welded steel bar being longer due to only single-point clamping and the clamping position being close to the welding end, resulting in the upper welding having a tendency to tilt along the arc plate 22 toward the corresponding clamping plate 31. At the same time, the upper and lower positioning rollers 252 elastically support the upper steel bar located on the upper and lower sides of the arc plate 22. There is a certain distance between the positioning rollers 252 and the arc plate 22, and the positioning roller 252 located at the top is far away from the lower end of the upper steel bar, thereby reducing the overturning moment generated by the external force on the clamping position of the arc plate 22 on the upper steel bar, so that the arc plate 22 and the upper clamping plate 31 do not need a large clamping force to clamp the upper steel bar, and the clamping stability of the upper steel bar is improved. When the transmission plate 24 moves to the right limit position, the clamping grooves of the arc plate 22 and the upper clamping plate 31 cooperate to rigidly clamp the upper steel bar. At this time, the steel bar is arranged vertically and is in a stable clamping state.

[0047] See Figure 4 and Figure 5 A mounting groove is provided in the middle of the right side arc surface of the arc plate 22, and the pressing group 26 includes a sliding plate 261 slidably installed in the mounting groove, and a plurality of pressing blocks 262 are fixedly installed on the right side of the sliding plate 261 and are evenly arranged up and down; a plurality of guide rods 263 are evenly arranged front and back and are penetrated and installed on the sliding plate 261 for sliding up and down, and the guide rods 263 are slidably installed left and right in the mounting groove, and a return spring 264 is connected between the lower end of the sliding plate 261 and the circular plate fixedly sleeved on the outer side of the lower end of the guide rod 263; guide blocks 265 are fixedly installed on the front and rear ends of the sliding plate 261, and guide grooves 221 are provided on the front and rear inner walls of the mounting groove, the upper end of the guide groove 221 is inclined to the left and the lower end is arranged vertically, and the guide blocks 265 are slidably installed in the corresponding guide grooves 221.

[0048] See Figure 4 、 Figure 5 、 Figure 6 and Figure 9The left end of the sliding plate 261 is fixedly installed with two L-shaped lower pressure rods 266 arranged symmetrically front and back. The horizontal section of the L-shaped lower pressure rod 266 slides through the arc surface on the left side of the arc plate 22. A lower pressure plate 241 corresponding to the L-shaped lower pressure rod 266 is installed on the transmission plate 24 and slides left and right. The left end of the lower pressure plate 241 is fixedly installed with a square plate 242, and a pressure spring 243 is connected between the square plate 242 and the left end of the transmission plate 24. The lower side of the right end of the lower pressure plate 241 is set to an inclined surface that matches the corresponding L-shaped lower pressure rod 266 vertical section; among them, the elastic force of the pressure spring 243 is much greater than the elastic force of the return spring 264, and the end of the vertical section of the L-shaped lower pressure rod 266 that matches the inclined surface of the lower pressure plate 241 is semi-spherical.

[0049] The lower pressing group 26 is used to make the lower end of the upper steel bar fit tightly with the upper end of the lower steel bar; specifically, the aforementioned positioning roller 252 supports the steel bar and provides a stable premise for the lower pressing block 262 to press the end of the transverse rib of the steel bar. Under this premise, when the transmission plate 24 moves to the right from the left extreme position, the transmission plate 24 drives the lower pressing plate 241 to move to the right, and the inclined surface of the lower pressing plate 241 and the vertical section of the L-shaped lower pressing rod 266 cooperate to drive the sliding plate 261 to move downward. At the same time, under the action of the inclined section of the guide groove 221 and the guide block 265, the sliding plate 26 1 moves downward and at the same time moves in the direction close to the steel bar, so that the sliding plate 261 drives the lower pressing block 262 to clamp the upper end of the corresponding transverse rib on the upper steel bar, and then the guide block 265 moves to the vertical section of the guide groove 221, so that the sliding plate 261 only moves vertically downward, so that the sliding plate 261 presses down the corresponding transverse rib on the upper steel bar through the lower pressing block 262, so that the upper steel bar is pressed against the upper end of the lower steel bar under the action of the lower pressing block 262. In this process, the sliding plate 261 is always arranged vertically under the action of the guide rod 263.

[0050] When the lower end of the upper steel bar is pressed against the upper end of the lower steel bar, the sliding plate 261 can no longer drive the lower pressure block 262 to move downward. At this time, the vertical section of the L-shaped lower pressure rod 266 still conflicts with the inclined surface of the lower pressure plate 241, and the transmission plate 24 continues to move to the right. Blocked by the vertical section of the L-shaped lower pressure rod 266, the lower pressure plate 241 will move to the left relative to the transmission plate 24 and stretch the pressure spring 243 through the square plate 242. At the same time, since the upper steel bar is arranged axially vertically at this time, the welding end of the upper steel bar and the welding end of the lower steel bar can be tightly and evenly fitted together during welding, further step to ensure the weld quality of the steel bars; when the transmission plate 24 moves to the right extreme position, the elastic locking rod 27 on the right is inserted into the corresponding locking hole to lock the telescopic section of the elastic telescopic rod 21, so that the arc plate 22 rigidly clamps the steel bars. When welding the two sections of steel bars, the pressure group 15 drives the movable plate 16 to move downward, and finally drives the clamped upper steel bar to rigidly press downward on the upper end of the lower steel bar. After completing the welding of the two sections of steel bars, when the transmission plate 24 moves to the left to the initial position, the sliding plate 261 returns to its initial position under the action of the return spring 264.

[0051] In summary, the present invention provides a welding fixture for the production of building foundation column steel bars, which is designed around the construction site requirements of "portable, flexible and movable, and layer-by-layer lap welding". Through the coordinated combination of multiple key components such as the alignment unit 3, the clamping unit 2, the calibration group 25, the downward pressure group 26, the locking group, and the adjustment group 33, it realizes the integrated control of multiple functions such as precise longitudinal rib alignment of the steel bars, dynamic vertical calibration, continuous and stable vertical pressure, and tight fitting of the ends. It solves the key technical problems of longitudinal rib dislocation, clamping deviation, and poor fitting of steel bar welding fixtures in the prior art, ensures the welding quality of the steel bars, and still retains the portability and on-site construction flexibility of the welding fixture.

[0052] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0055] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding fixture for producing steel bars for building foundation columns, comprising a docking unit, wherein the docking unit comprises two screw rod groups arranged one above the other, and a clamping head is provided on the lower screw rod group, characterized in that: Also includes: The clamping unit includes an arc-shaped plate connected to the upper screw group through an elastic telescopic rod, a transmission plate is provided on the left and right sliding sleeves outside the fixed section of the elastic telescopic rod, a calibration group is provided on the right side of the transmission plate, and a pressing group is connected between the arc-shaped plate and the transmission plate; The alignment unit corresponding to the screw group one by one includes a clamping plate arranged on the docking unit, a V-shaped clamping groove is opened in the middle of the left end of the clamping plate, and multiple alignment plates are arranged on both inner side walls of the clamping groove. An adjustment group for adjusting the left and right positions of the alignment plates is installed between the multiple alignment plates and the clamping plate; The alignment group includes inclined plates and alignment rollers that are symmetrically arranged up and down. The inclined plates are hinged via a torsion spring shaft and generate bidirectional pressure. Taking the lower steel bar in a fixed state as the reference, the arc plate and the clamping groove cooperate to clamp the upper steel bar while the positioning plate contacts the right end of the longitudinal rib of the corresponding steel bar, automatically aligning the longitudinal ribs of the two sections of steel bars up and down. Then the transmission plate moves right to control the positioning roller to press the upper steel bar to make it vertically centered. At the same time, the transmission plate drives the pressing group to press down the transverse ribs of the upper steel bar, so that the ends of the two sections of steel bars fit tightly and evenly.

2. A welding fixture for manufacturing building foundation column reinforcement according to claim 1, characterized in that: The clamping plate is provided with square holes corresponding to the alignment plates one by one. The adjustment group includes a sliding rod that is slid left and right in the square hole. The alignment plate is slid back and forth by a top spring and is installed on the side of the sliding rod close to the middle of the clamping plate. Multiple sliding rods arranged up and down are fixedly installed with a synchronization rod on the side away from the middle of the clamping plate. The right ends of the two synchronization rods corresponding to the same clamping plate are fixedly installed with a U-shaped adjustment plate.

3. A welding fixture for manufacturing building foundation column reinforcement according to claim 2, characterized in that: The adjusting plate is connected to a plurality of limit rods fixedly mounted on the right end of the clamping plate in a left-right sliding manner. An adjusting screw is threadedly connected to the adjusting plate, and the left end of the adjusting screw is rotatably mounted on the middle of the right end of the clamping plate.

4. A welding fixture for manufacturing building foundation column reinforcement according to claim 1, characterized in that: The inclined plate is hinged to the right end of the transmission plate through a torsion spring shaft. The right ends of the two inclined plates are tilted away from each other. The arc plate is located between the two inclined plates, and the alignment roller is rotatably installed on the right end of the inclined plate.

5. A welding fixture for manufacturing building foundation column reinforcement according to claim 1, characterized in that: A mounting groove is provided in the middle of the right side of the arc surface of the arc plate. The pressing group includes a sliding plate slidably installed in the mounting groove. A plurality of pressing blocks evenly arranged up and down are fixedly installed on the right side of the sliding plate.

6. A welding fixture for manufacturing building foundation column reinforcement according to claim 5, characterized in that: A plurality of guide rods evenly arranged front and back are installed on the sliding plate so as to pass through and slide up and down, and the guide rods are installed in the installation grooves for sliding left and right. A reset spring is arranged between the lower end of the sliding plate and a circular plate fixedly sleeved on the outer side of the lower end of the guide rod.

7. A welding fixture for manufacturing building foundation column reinforcement according to claim 5, characterized in that: Guide blocks are fixedly installed at both ends of the sliding plate, and guide grooves are opened on the front and rear inner walls of the installation groove. The upper end of the guide groove is arranged to be tilted to the left and the lower end is arranged vertically. The guide blocks are slidably installed in the corresponding guide grooves.

8. A welding fixture for manufacturing building foundation column reinforcement according to claim 5, characterized in that: The left end of the sliding plate is fixedly installed with two L-shaped pressure rods arranged symmetrically front and back. The horizontal section of the L-shaped pressure rod slides through the curved surface of the left side of the curved plate. A pressure plate corresponding to the L-shaped pressure rod is installed on the transmission plate and slides left and right. A square plate is fixedly installed on the left end of the pressure plate, and a pressure spring is connected between the square plate and the left end of the transmission plate. The lower side of the right end of the pressure plate is set to an inclined surface that matches the vertical section of the corresponding L-shaped pressure rod.

9. A welding fixture for manufacturing building foundation column reinforcement according to claim 1, characterized in that: The fixed section of the elastic telescopic rod is equipped with two locking groups arranged on the left and right. The locking groups include multiple circumferentially evenly arranged elastic locking rods that penetrate and radially slide on the outside of the fixed section of the elastic telescopic rod. Locking holes are opened at positions corresponding to the elastic locking rods on the outside of the telescopic section of the elastic telescopic rod.

10. A welding fixture for manufacturing building foundation column reinforcement according to claim 9, characterized in that: Matching blocks corresponding to the elastic locking rods are installed at both left and right ends of the transmission plate, and one end of the matching block away from the transmission plate is set as an inclined surface matching the corresponding elastic locking rod.

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