A welding positioner for H-shaped steel processing

Abstract

The present invention relates to the field of welding positioner technology and discloses a welding positioner for processing H-shaped steel, comprising two parallel rail bases, a mirror-distributed position change clamping system being provided above the rail base, the position change clamping system being composed of a main bearing frame which is transmission-arranged above the rail base and a flange surface clamping mechanism and a web surface clamping mechanism which are respectively assembled on the inner and outer sides thereof, wherein the web surface clamping mechanism is composed of a first lifting assembly and a first clamping assembly, and the flange surface clamping mechanism is composed of a second lifting assembly and a second clamping assembly, and a rotating working disk for adjusting the angle of the flange surface clamping mechanism is provided on the side wall of the main bearing frame; the workpiece is flipped ±90° by rotating the working disk, and the flange surface clamping mechanism and the web surface clamping mechanism are alternately connected to each other, so that the welding device can perform full-circle welding without obstacles.

Description

Technical Field

[0001] The present invention relates to the technical field of welding positioner, and more particularly to a welding positioner for processing H-shaped steel. Background Art

[0002] As an important auxiliary equipment in modern welding technology, the core function of the welding positioner is to effectively reduce manual labor intensity, improve welding efficiency and operation safety, and at the same time realize multi-angle flipping of the workpiece to be welded to meet the needs of different welding positions, thereby ensuring welding quality; in the prior art, such as Chinese invention patent CN111906489A discloses a typical welding positioner structure, including: a supporting part for carrying the workpiece; a clamping part, arranged on the supporting part to fix the workpiece; a driving part, connected to the supporting part to drive its rotation; and a support guide, used to support the supporting part and provide guidance for its rotational movement.

[0003] Although this existing technical solution can realize the clamping and angle adjustment functions of the workpiece and adjust the surface to be welded to an appropriate position, it is found that there are significant technical defects in actual application: when the supporting part is rotated and the angle is adjusted, the clamping device may produce synchronous displacement, causing it to enter the operating trajectory range of the welding device, forming mechanical motion interference. This interference phenomenon not only affects the continuity of the welding process, but is also likely to cause welding quality defects, seriously restricting the efficiency improvement and process stability of automated welding; therefore, it is urgent to develop a new type of welding positioner structure to solve the motion interference problem existing in the existing technology and realize smooth and continuous operation of the welding process. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding positioner for H-shaped steel processing, which aims to solve the problem of interference in the welding operation trajectory caused by the synchronous displacement of the clamping device when the supporting part rotates.

[0005] The present invention provides the following technical solution: a welding positioner for processing H-shaped steel, comprising two parallel track bases, a mirror-image transposition clamping system disposed above the track bases, the transposition clamping system comprising a main bearing frame drivenly disposed above the track bases, and a flange surface clamping mechanism and a web surface clamping mechanism assembled on the inner and outer sides thereof, wherein the web surface clamping mechanism comprises a first lifting assembly and a first clamping assembly, and the flange surface clamping mechanism comprises a second lifting assembly and a second clamping assembly, and a rotating work disk for adjusting the angle of the flange surface clamping mechanism is disposed on the side wall of the main bearing frame;

[0006] The first clamping assembly includes a first lifting table, a first bidirectional lead screw, and a web clamping assembly. The first lifting table is of an integrally formed structure, including two side wing plates and a central drive groove. The wing plates are threadedly connected to the first unidirectional lead screw, and the first bidirectional lead screw is rotatably installed in the drive groove. The web clamping assemblies are symmetrically distributed and threadedly connected to the surface of the first bidirectional lead screw. The second lifting assembly is fixedly installed on the rotating working disk, and the second clamping assembly is assembled on the second lifting assembly. The rotating working disk rotates the workpiece by ±90°, and in cooperation with the alternating takeover of the flange surface clamping mechanism and the web surface clamping mechanism, the welding device can perform full-circumference welding without obstruction.

[0007] Furthermore, an arc-shaped positioning card slot is installed on the outer side of the arc opening of the main bearing frame, and a plurality of guiding rollers are circumferentially distributed around it. The rotating working disk is of an integrally formed structure, including a limiting ring edge, an arc-shaped groove, and a ring gear. The limiting ring edge is embedded in the arc-shaped positioning card slot, the arc-shaped groove cooperates with the guiding rollers for positioning, and the ring gear meshes with the disk drive gear arranged at the center of the bottom of the main bearing frame to form a meshing drive. The disk drive gear is connected to the output end of the driving device. A ring-shaped opening matching the arc opening of the main bearing frame is provided on the surface of the rotating working disk, and a flange surface clamping mechanism is provided on the side facing away from the main bearing frame.

[0008] Furthermore, the web clamping assembly is composed of a clamping main plate, a tube body, a resisting rod, and a first spring. The clamping main plate is sleeved on the outer surface of the first bidirectional lead screw through threaded cooperation. An internal accommodation cavity is provided at the top of the clamping main plate, and the detachably installed tube body is placed in this accommodation cavity. The resisting rod movably inserted into the tube body extends towards the H-shaped steel, and a first spring sleeved on the surface of the resisting rod is provided at the outer end of the clamping main plate. The top of the accommodation cavity is defined as a sealing plate.

[0009] Furthermore, the first clamping assembly further includes a pushing rod, a fence, a positioning shaft, a cross lever arm, a pressure-resistant plate, and an elastic reset oil cylinder. The fence is assembled on the side wall of the first lifting table in a detachable manner. The pushing rod is installed on the web clamping assembly. A positioning shaft is vertically provided at the center of the fence, and two cross lever arms distributed in a front-back staggered and crossed manner are rotatably installed on the surface of the positioning shaft. The cross lever arms extend downward from the positioning shaft to the left and right sides, form a turning arc at the lowest point, and then continue to extend to the side of the H-shaped steel. The distal ends thereof are hinged to the pressure-resistant plate through bolt shafts. At the same time, the downward-sloping section of the cross lever arm is connected to the telescopic end of the elastic reset oil cylinder, and the elastic reset oil cylinder is rotatably installed on the side wall of the fence through an oil cylinder mounting shaft.

[0010] Furthermore, the top of the main bearing frame is equipped with a lubricating nozzle located above the guide roller, and the elastic reset cylinder is composed of a cylinder body, a piston push rod, a second spring, a one-way valve and an oil pipeline, wherein the cylinder body is rotatably connected to the end of the cylinder mounting shaft, and a baffle structure with a through hole is provided on the top of its inner cavity; the piston push rod is inserted into the cylinder body in a sliding manner and is connected to the partition through the second spring; a closed liquid cavity is formed above the baffle, and the side walls of the liquid cavity are respectively equipped with one-way valves for discharging and inletting liquid, one of which is connected to the lubricating nozzle through a flow channel formed by the one-way valve and the oil pipeline, and the other is connected to the oil supply system through the one-way valve.

[0011] Furthermore, the track base adopts an integrally formed structure, the top wall of which is provided with a track groove, and the inner wall is provided with a gear track; the bottom walls at the left and right ends of the main supporting frame are slidably engaged with the track groove, and a track gear is provided on the inner side of each track base. The track gear is meshed with the gear track and is coaxially installed with the rotating shaft that passes through the chassis of the main supporting frame, and a power transmission assembly is configured at the top of the rotating shaft.

[0012] Furthermore, an arc opening is opened at the top of the main bearing frame, one side of which is a web surface clamping mechanism, the web surface clamping mechanism is composed of a first lifting assembly and a first clamping assembly, the first lifting assembly is composed of a first one-way screw, a first transmission shaft, a first commutator and a first transmission part, wherein the first one-way screw arranged symmetrically on the left and right extends longitudinally along both sides of the arc opening of the main bearing frame, and the top end is rotatably connected to the axle seat; the first transmission shaft is arranged parallel to the chassis of the main bearing frame, and its two ends are connected to the bottom end of the first one-way screw through the first commutator, and are connected to the drive device via the first transmission part to form a power transmission link.

[0013] Furthermore, the first commutator comprises an outer shell mounted on the side wall of the main bearing frame, wherein a vertical screw roller and a horizontal gear are arranged vertically inside the outer shell and meshed with each other, and the two are rigidly connected to the first one-way screw rod and the first transmission shaft through shaft end socketing.

[0014] Furthermore, the first transmission part includes a pulley assembled on the first transmission shaft and the output shaft of the driving device, and a synchronous belt connecting the two.

[0015] Furthermore, the transmission groove and the side walls of the main supporting frame are respectively provided with transverse and longitudinal guide rails, and the web clamping assembly and the back side of the first lifting platform are correspondingly configured with a clamping strip structure that adapts to the direction of the guide rails; the middle part of the first lifting platform is also equipped with a power transmission assembly for driving the first bidirectional screw; the end of the reciprocating rod is provided with a jaw structure.

[0016] Technical effects and advantages of the present invention:

[0017] The present invention realizes the precise positioning and clamping of the web and flange of the H-shaped steel through the coordinated adjustment of the flange surface clamping mechanism and the web surface clamping mechanism; utilizes the rotating work disk to complete the ±° flipping of the workpiece, and cooperates with the alternating connection of the flange surface clamping mechanism and the web surface clamping mechanism, so that the welding device can implement full-circle welding without obstacles; this design forms a three-in-one adaptive clamping system through spacing adjustment, controlled lifting positioning and realized workpiece flipping, which effectively solves the positioning problem of multi-sided welding of H-shaped steel and significantly improves welding accuracy and efficiency.

[0018] The present invention realizes flexible clamping of the web by utilizing the synergistic effect of the elastic contraction of the resistance rod and the lever movement of the cross lever arm; the cross lever arm is automatically reset by the energy storage-release characteristics of the elastic reset cylinder; combined with the self-lubricating system driven by the reciprocating motion of the elastic reset cylinder, continuous lubrication of the guide roller is achieved through the two-way oil circuit of the one-way valve and the spraying of the lubricating nozzle. This integrated system realizes the three major functions of adaptive flexible clamping, elastic reset and self-lubrication, which effectively improves welding accuracy, reduces equipment wear and eliminates rigid impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the connection between the position change clamping system and the track base on the middle side.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.

[0022] Figure 4 For the present invention Figure 2 Orthographic projection of the single-side view of the structure.

[0023] Figure 5 For the present invention Figure 2 Schematic diagram of the connection structure between the middle main load-bearing frame and the web surface clamping mechanism.

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point B.

[0025] Figure 7 For the present invention Figure 5 Schematic diagram of the structure at point C in the middle.

[0026] Figure 8 This is a schematic structural diagram of the first clamping assembly of the present invention.

[0027] Figure 9 It is a schematic diagram showing the details of the connection structure of the first lifting platform, the first bidirectional screw, the web clamping assembly and the power transmission assembly of the present invention.

[0028] Figure 10 Schematic diagram of the main load-bearing frame, flange surface clamping mechanism and rotating working disk connection structure of the present invention.

[0029] Figure 11 Schematic diagram of the flange surface clamping mechanism and rotating working disk connection structure of the present invention.

[0030] Figure 12 For the present invention Figure 11 Schematic diagram showing details of the rotating working disk on the other side of the structure in the present invention.

[0031] Reference numerals are: 1, track base; 2, main load-bearing frame; 3, first lifting assembly; 301, first one-way lead screw; 302, first transmission shaft; 303, first commutator; 3031, vertical screw roller; 3032, horizontal gear; 3033, outer housing; 304, first transmission part; 4, first clamping assembly; 401, first lifting platform; 402, first double lead screw; 403, web clamping assembly; 4031, clamping main plate; 4032, pipe body; 4033, abutting rod; 4034, first spring; 4035, encapsulation plate; 404, push rod; 405, fence; 406, positioning shaft; 407, cross lever arm; 408, compression plate; 409, elastic reset oil cylinder; 4091, oil cylinder body; 4092, piston push rod; 4093, second spring; 4094, one-way valve; 4095, oil pipeline; 410, oil cylinder mounting shaft; 5, second lifting assembly; 501, second one-way lead screw; 502, second transmission shaft; 503, second commutator; 504, second transmission part; 6, second clamping assembly; 601, second lifting platform; 602, second double lead screw; 603, flange clamping assembly; 7, rotating working disk; 8, disk drive gear; 9, power transmission assembly; 901, box body; 902, output gear; 903, intermediate gear; 904, transmission screw; 905, reversible motor; 10, track gear; 11, lubricating nozzle; 12, guiding roller; 13, arc-shaped positioning slot. Detailed implementation mode

[0032] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention. In addition, the forms of each structure described in the following implementation modes are merely examples, and a welding positioner for H-shaped steel processing involved in the present invention is not limited to the structures described in the following implementation modes. All other implementation modes obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0033] Refer to Figures 1 - 12The present invention provides a welding positioner for processing H-shaped steel, comprising two parallel track bases 1, a mirror-image-distributed transposition clamping system is provided above the track base 1, the transposition clamping system is composed of a main bearing frame 2 which is transmission-disposed above the track base 1, and a flange surface clamping mechanism and a web surface clamping mechanism which are respectively assembled on the inner and outer sides thereof, wherein the web surface clamping mechanism is composed of a first lifting assembly 3 and a first clamping assembly 4, and the flange surface clamping mechanism is composed of a second lifting assembly 5 and a second clamping assembly 6, and a rotating working disk 7 which can adjust the angle of the flange surface clamping mechanism is provided on the side wall of the main bearing frame 2, forming an adjustable double-station clamping device;

[0034] In this embodiment, it should be specifically explained that the track base 1 adopts an integrally formed structure, the top wall of which is provided with a track groove, and the inner side wall is provided with a gear track; the bottom walls at the left and right ends of the main supporting frame 2 are slidably engaged with the track groove, and can move smoothly along the top of the track base 1; a track gear 10 is provided on the inner side of each track base 1, and the track gear 10 is meshed with the gear track and is coaxially installed with the rotating shaft that passes through the chassis of the main supporting frame 2, and a power transmission assembly 9 is configured at the top of the rotating shaft; the power transmission assembly 9 serves as a kinetic energy supply device, which can provide controllable and stable torque for the track gear 10, and can also be replaced by other equivalent power devices. This structure ensures the movement accuracy and stability of the main supporting frame 2 through the track groove guide of the track base 1 and the gear track transmission of the track gear 10;

[0035] The power transmission assembly 9 consists of a housing 901, an output gear 902, an intermediate gear 903, a transmission screw 904 and a reversible motor 905, wherein the housing 901 is fixed to the chassis of the main bearing frame 2, the output gear 902 is rigidly connected to the rotating shaft of the track gear 10, and the output gear 902, the intermediate gear 903 and the transmission screw 904 are all built into the housing 901; the transmission screw 904 is coaxially assembled with the output shaft of the reversible motor 905, and its side teeth mesh with the end teeth of the intermediate gear 903, while the other end teeth of the intermediate gear 903 form an end face meshing transmission with the output gear 902; this structure realizes the torque transmission from the reversible motor 905 to the track gear 10 through the three-stage meshing of the transmission screw 904-intermediate gear 903-output gear 902;

[0036] The two sets of power transmission assemblies 9 used to drive the track gear 10 adopt synchronous drive control and equal transmission ratio design to ensure that the track gear 10 obtains balanced torque output, so that the transposition clamping system can achieve smooth and synchronous displacement;

[0037] In this article, all the positional relationships we discuss about front, back, left, and right are based on Figures 1 - 4It is defined from the presented perspectives. These orientation descriptions do not have actual geographical or physical meanings. They are just a reference framework set to help readers more intuitively understand the content in the text. In this way, we can more clearly show the relative position relationships between various parts, making the whole discussion process easier to understand and follow. Please note that this custom orientation identifier is only applicable for internal use in this article and does not represent any absolute direction or position in the real world;

[0038] The cross-sectional structure of the H-beam consists of the following three parts: Two parallel horizontal parts are called flanges (or side plates, edges); The middle vertical connecting part is called the web (or center plate, web beam); The flanges and the web are connected at right angles to form a typical "H" - shaped cross-sectional structure.

[0039] Refer to Figures 2 - 5 、 Figure 7 、 Figure 9 and Figures 10 - 12 As shown in FIGS.

[0040] At the top of the main load-bearing frame 2, an arc-shaped opening is provided. On one side, there is a web surface clamping mechanism, which is composed of a first lifting assembly 3 and a first clamping assembly 4. The first lifting assembly 3 is composed of a first one-way lead screw 301, a first transmission shaft 302, a first commutator 303 and a first transmission part 304. Among them, the left and right symmetrically arranged first one-way lead screws 301 longitudinally extend along both sides of the arc-shaped opening of the main load-bearing frame 2, and the top ends are rotatably connected to the shaft seats; The first transmission shaft 302 is arranged parallel to the chassis of the main load-bearing frame 2, and its two ends are drivingly connected to the bottom ends of the first one-way lead screws 301 through the first commutator 303, and are connected to the driving device via the first transmission part 304 to form a power transmission link;

[0041] An arc-shaped positioning slot 13 is installed on the outer side of the arc opening of the main supporting frame 2, and multiple guide rollers 12 are evenly distributed around its periphery; the rotating working disk 7 adopts an integrally formed structure, including a limiting ring edge, an arc-shaped groove and an annular gear. The limiting ring edge is embedded in the arc-shaped positioning slot 13, and the arc-shaped groove cooperates with the guide roller 12 for positioning. The annular gear forms a meshing transmission with the disk drive gear 8 provided at the bottom center of the main supporting frame 2; the disk drive gear 8 is connected to the output end of the drive device; the surface of the rotating working disk 7 is provided with an annular opening that matches the arc opening of the main supporting frame 2, and a flange surface clamping mechanism is provided on the side facing away from the main supporting frame 2;

[0042] In this embodiment, it should be specifically noted that the driving device may be a servo motor or other power output device adapted to the first transmission part 304, the second transmission part 504 and the disk drive gear 8;

[0043] The first commutator 303 comprises an outer housing 3033 mounted on the side wall of the main support frame 2, within which a meshing vertical screw roller 3031 and a horizontal gear 3032 are vertically arranged and rigidly connected to the first one-way screw rod 301 and the first transmission shaft 302 respectively through a shaft end socket connection. The meshing transmission of the vertical screw roller 3031 and the horizontal gear 3032 realizes the conversion of horizontal torque to vertical torque. This structure allows for the use of other equivalent torque reversing devices as replacements.

[0044] The first transmission part 304 includes pulleys mounted on the first transmission shaft 302 and the output shaft of the driving device, and a synchronous belt connecting the two, forming a power transmission system;

[0045] The output gear 902 in the power transmission assembly 9 is rigidly connected to the first bidirectional screw 402, which directly transmits the output torque to the first bidirectional screw 402 to achieve precise adjustment of its forward and reverse rotation; the surface of the first bidirectional screw 402 is provided with a mirror-symmetrically distributed thread structure;

[0046] The flange surface clamping mechanism includes two components, a second lifting assembly 5 and a second clamping assembly 6; the second lifting assembly 5 is fixedly mounted on the rotating working disk 7, and the second clamping assembly 6 is assembled on the second lifting assembly 5; specifically, the second lifting assembly 5 is composed of a second one-way screw rod 501, a second transmission shaft 502, a second commutator 503 and a second transmission part 504: the symmetrically arranged second one-way screw rod 501 extends parallel to the side of the annular opening of the rotating working disk 7, and one end thereof is rotatably connected through the shaft seat; the two ends of the first transmission shaft 302 arranged parallel to the base frame of the rotating working disk 7 are respectively connected to the bottom end of the second one-way screw rod 501 through the second commutator 503, and are connected to the driving device through the second transmission part 504 to form a complete power transmission path; it should be noted that the second lifting assembly 5 has the same structural configuration and working mechanism as the first lifting assembly 3. Based on the fact that those skilled in the art can clearly understand its specific connection method, it will not be repeated here;

[0047] The second clamping assembly 6 includes a second lifting table 601, a second bidirectional lead screw 602 and a flange clamping assembly 603. The second lifting table 601 adopts an integrally formed structure, including two side wing plates and a transmission groove in the middle. The wing plates are threadedly connected to the second unidirectional lead screw 501, and the second bidirectional lead screw 602 is rotatably installed in the transmission groove. The surface of the second bidirectional lead screw 602 is threadedly connected to the flange clamping assemblies 603 distributed mirror-symmetrically. Guide rails are respectively provided on the side wall of the transmission groove and the rotating working disk 7, and the flange clamping assemblies 603 and the back side of the second lifting table 601 are correspondingly configured with strip structures adapted to the direction of the guide rails. A power transmission assembly 9 for driving the second bidirectional lead screw 602 is also assembled in the middle of the second lifting table 601. The second clamping assembly 6 has the same structural configuration and working mechanism as the first clamping assembly 4. Based on the fact that those skilled in the art can clearly understand its specific connection method, it will not be elaborated here.

[0048] The relative end faces of the two symmetrically arranged flange clamping assemblies 603 exceed the flange size of the H-beam, and an efficient load-bearing structure is formed through surface contact.

[0049] Refer to Figures 4 - 6 、 Figure 8 and Figure 9 The web clamping assembly 403 is composed of a clamping main plate 4031, a tube body 4032, a resisting rod 4033 and a first spring 4034. The clamping main plate 4031 is sleeved on the outer surface of the first bidirectional lead screw 402 through threaded fit. An internal accommodation cavity is provided at the top of the clamping main plate 4031, and the detachably installed tube body 4032 is placed in the accommodation cavity. The resisting rod 4033 movably inserted into the tube body 4032 extends in the direction of the H-shaped steel, and a first spring 4034 sleeved on the surface of the resisting rod 4033 is provided at the outer end of the clamping main plate 4031. The top of the accommodation cavity is defined as a sealing plate 4035.

[0050] The first clamping assembly 4 further includes a push rod 404, a fence 405, a positioning shaft 406, a cross lever arm 407, a compression plate 408 and an elastic reset oil cylinder 409. The fence 405 is assembled on the side wall of the first lifting table 401 in a detachable manner. The push rod 404 is installed on the web clamping assembly 403. A positioning shaft 406 is vertically arranged at the center of the fence 405. Two cross lever arms 407 distributed in a front-back staggered and crossed manner are rotatably installed on the surface of the positioning shaft 406. The cross lever arms 407 extend downward from the positioning shaft 406 to the left and right sides, form a turning arc at the lowest point and then continue to extend to the side of the H-shaped steel. The distal ends thereof are hinged to the compression plate 408 through bolt shafts. At the same time, the downward inclined sections of the cross lever arms 407 are connected to the telescopic ends of the elastic reset oil cylinder 409. The elastic reset oil cylinder 409 is rotatably installed through an oil cylinder mounting shaft 410, and the oil cylinder mounting shaft 410 is assembled on the side wall of the fence 405.

[0051] In this embodiment, it should be specifically noted that a jaw structure is provided at the end of the push rod 404. When the contact rod 4033 contacts the H-shaped steel and undergoes elastic compression, the push rod 404 has already contacted the free end of the cross lever arm 407 located on the upper layer of the positioning shaft 406 and drives the cross lever arm 407 to rotate around its rotation axis until the compression plate 408 is completely pressed against the surface of the steel. At this time, the contact rod 4033 is still within its elastic displacement stroke range;

[0052] A lubricating nozzle 11 is assembled at the top of the main bearing frame 2 above the guiding roller 12. The elastic reset oil cylinder 409 is composed of an oil cylinder body 4091, a piston push rod 4092, a second spring 4093, a one-way valve 4094 and an oil delivery pipeline 4095. Among them, the oil cylinder body 4091 is rotatably connected to the end of the oil cylinder mounting shaft 410, and a baffle structure with a through hole is provided at the top of its inner cavity; the piston push rod 4092 is inserted into the oil cylinder body 4091 in a slidable manner and is connected to the partition layer through the second spring 4093; a sealed liquid cavity is formed above the baffle, and one-way valves 4094 for liquid discharge and liquid inlet are respectively installed on the side wall of the liquid cavity. One path is communicated to the lubricating nozzle 11 through the flow channel formed by the one-way valve 4094 and the oil delivery pipeline 4095, and the other path is connected to the oil supply system (which can adopt a fuel tank structure) through the one-way valve 4094.

[0053] The working principle of the present invention:

[0054] First, adjust the distance between the two groups of transposition clamping systems to make it adapt to the optimal load-bearing position of the H-shaped steel. The specific implementation method is as follows: The power transmission assembly 9 outputs torque, and this torque is transmitted to the rotating shaft coaxially connected to the track gear 10, driving the track gear 10 to move along the inner tooth track of the track base 1, thereby driving the transposition clamping system to achieve horizontal displacement above the track base 1; the output direction of the power transmission assembly 9 determines the moving direction of the transposition clamping system; among them, the torque output mechanism of the power transmission assembly 9 is: the output shaft of the reversible motor 905 drives the transmission screw 904 to rotate, and the torque is transmitted to the output gear 902 through the intermediate gear 903 meshing with it, and then drives the output gear 902 coaxially connected to the track gear 10 to rotate synchronously, finally completing the precise positioning adjustment of the two groups of transposition clamping systems;

[0055] Next, when adjusting the web surface clamping mechanism, the servo motor first drives the first transmission part 304 (a combination of a synchronous belt and a pulley) to transmit power to the first transmission shaft 302. The first transmission shaft 302 distributes the torque synchronously to the first one-way screws 301 on the left and right sides through the first commutator 303 connected at both ends, driving the two first one-way screws 301 to achieve co-directional rotation, thereby driving the first clamping assembly 4 connected in the thread to generate vertical displacement. By switching the direction of the servo motor, the lifting movement of the first clamping assembly 4 is controlled to accurately position it to the preset position. The power transmission assembly 9 for adjusting the lateral position of the first clamping assembly 4 is then activated. The output torque of the power transmission assembly 9 is transmitted to the first bidirectional screw 402 via the output gear 902. The rotation of the first bidirectional screw 402 is controlled by the forward and reverse rotation of the reversible motor 905 to adjust the distance between the left and right web clamping assemblies 403 (towards or away from each other), ultimately achieving stable clamping and precise height positioning of the H-shaped steel web, ensuring that the welding device can perform welding processing (such as metal pick welding) on the upper exposed flange without obstacles.

[0056] When the welding of the upper flange of the H-shaped steel is completed, the servo motor connected to the disk drive gear 8 is started. The motor provides torque to the disk drive gear 8 and drives the rotating working disk 7 engaged therewith to rotate, so that the rotating working disk 7 performs a circular motion along the arc-shaped positioning slot 13 under the guidance of the guide roller 12 (the rotation direction is determined by the output direction of the motor, and the angle range is ±90°), and the flange surface clamping mechanism is rotated from the horizontal position to the vertical position; then the second lifting assembly 5 and the second clamping assembly 6 of the flange surface clamping mechanism operate according to the same principle as the aforementioned first lifting assembly 3 and the first clamping assembly 4 to complete the clamping of the H-shaped steel flange and connect with the web surface clamping mechanism, and then the web surface clamping mechanism is unlocked; finally, the flange surface clamping mechanism rotates back to the horizontal position to realize the flipping of the workpiece, so that the original web surface is turned to the welding station, and the welding device can perform barrier-free processing on this surface; by alternating the flange surface and web surface clamping mechanisms, the full-circle welding operation of the H-shaped steel is realized;

[0057] When the left and right web clamping assemblies 403 move towards each other to position the H-beam web, the contact rod 4033 first contacts the web and elastically contracts into the tube body 4032 under the contact pressure, gradually increasing the clamping force. At the same time, the push rod 404 connected to the outside of the web clamping assembly 403 moves horizontally along the chute of the fence 405, pushing the cross lever arms 407 arranged in a cross-misaligned manner to rotate towards each other around the axis of the positioning shaft 406 - the left push rod 404 pushes the upper right rod body of the left cross lever arm 407, and the right push rod 404 pushes the upper left rod body of the right cross lever arm 407, enabling the pressure-resistant plates 408 connected by bolt shafts to adaptively fit both sides of the web, forming a surface contact auxiliary clamping, which not only expands the force-bearing area but also realizes flexible pressing. This linkage mechanism ensures a stable clamping process and avoids rigid impact through the synergistic action of the elastic contraction of the contact rod 4033 and the lever movement of the cross lever arms 407;

[0058] Further, when the left and right cross lever arms 407 rotate towards each other around the positioning shaft 406, the piston push rod 4092 directly connected to them will pull the elastic reset oil cylinder 409 as a whole to follow and deflect around the oil cylinder mounting shaft 410. At the same time, the piston push rod 4092 compresses the second spring 4093 along the oil cylinder body 4091 to cause elastic deformation and store potential energy. In this way, when the push rod 404 moves in the opposite direction with the web clamping assembly 403 to relieve the thrust on the cross lever arms 407, the elastic restoring force of the second spring 4093 will push the cross lever arms 407 to rotate synchronously, ensuring that the cross lever arms 407 always maintain coordinated movement with the web clamping assembly 403. This elastic reset mechanism realizes the automatic reset function of the clamping assembly when the acting force is released through the energy storage - energy release characteristics of the elastic reset oil cylinder 409;

[0059] Further, during the energy storage - energy release process of the elastic reset oil cylinder 409, the telescopic movement of the piston push rod 4092 along the oil cylinder body 4091 will cause changes in the internal cavity pressure: when the piston push rod 4092 compresses the oil cylinder body 4091, the lubricating oil in the cavity is squeezed out, discharged through the one-way valve 4094 connected by the oil delivery pipeline 4095, and finally sprayed onto the surface of the guide roller 12 through the lubricating nozzle 11, effectively reducing the frictional resistance and noise during the operation of the rotating working disk 7; when the piston push rod 4092 retracts, a negative pressure is formed in the oil cylinder body 4091, and lubricating oil is automatically replenished from the oil supply system through the one-way valve 4094 to prepare for the next working cycle. Therefore, through the reciprocating movement of the elastic reset oil cylinder 409, continuous self-lubrication of the guide roller 12 is also realized, and the two-way oil circuit design of the one-way valve 4094 ensures the cyclic replenishment of the lubricating oil.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention; making equivalent substitutions or modifications according to the technical plan and its improvement concept of the present invention, these should all be included under the protection of the present invention.

Claims

1. A welding positioner for H-shaped steel processing, comprising two parallel track bases (1), and a transposition clamping system with mirror-image distribution is arranged above the track bases (1), characterized in that: The transposition clamping system consists of a main bearing frame (2) driven and arranged above the track base (1), and a flange surface clamping mechanism and a web surface clamping mechanism respectively assembled on its inner and outer sides. The web surface clamping mechanism consists of a first lifting assembly (3) and a first clamping assembly (4), and the flange surface clamping mechanism consists of a second lifting assembly (5) and a second clamping assembly (6). A rotary working disk (7) for adjusting the angle of the flange surface clamping mechanism is arranged on the side wall of the main bearing frame (2). The first clamping assembly (4) includes a first lifting platform (401), a first bidirectional lead screw (402) and a web clamping component (403). The first lifting platform (401) adopts an integrally formed structure, including two side wing plates and a central transmission groove. The wing plates are threadedly connected with the first unidirectional lead screw (301), and the first bidirectional lead screw (402) is rotatably installed in the transmission groove. Symmetrically distributed web clamping components (403) are threadedly connected to the surface of the first bidirectional lead screw (402). The second lifting assembly (5) is fixedly installed on the rotary working disk (7), and the second clamping assembly (6) is assembled on the second lifting assembly (5). The rotary working disk (7) completes a ±90° flip of the workpiece, and cooperates with the alternating takeover of the flange surface clamping mechanism and the web surface clamping mechanism, so that the welding device can perform full-circumference welding without obstacles. The first clamping assembly (4) further includes a push rod (404), a fence (405), a positioning shaft (406), a cross lever arm (407), a pressure-resistant plate (408) and an elastic reset oil cylinder (409). The fence (405) is assembled on the side wall of the first lifting platform (401) in a detachable manner. The push rod (404) is installed on the web clamping component (403). A positioning shaft (406) is vertically arranged at the center of the fence (405). Two cross lever arms (407) distributed in a front-back staggered and crossed manner are rotatably installed on the surface of the positioning shaft (406). The cross lever arms (407) extend downward from the positioning shaft (406) to the left and right sides, form a turning arc at the lowest point and then continue to extend to the side of the H-shaped steel. The distal ends thereof are hinged to the pressure-resistant plate (408) through bolt shafts. At the same time, the downward inclined section of the cross lever arm (407) is connected to the telescopic end of the elastic reset oil cylinder (409). The elastic reset oil cylinder (409) is rotatably installed on the side wall of the fence (405) through an oil cylinder mounting shaft (410).

2. The welding positioner for H-shaped steel processing according to claim 1, characterized in that: An arc-shaped positioning card slot (13) is installed on the outer side of the arc opening of the main bearing frame (2), and a plurality of guiding rollers (12) are circumferentially and evenly distributed around it. The rotary working disk (7) adopts an integrally formed structure, including a limiting ring edge, an arc-shaped groove and ring teeth. The limiting ring edge is embedded in the arc-shaped positioning card slot (13), the arc-shaped groove is matched with the guiding rollers (12) for positioning, and the ring teeth are meshed with a disk driving gear (8) arranged at the center of the bottom of the main bearing frame (2). The disk driving gear (8) is connected to the output end of the driving device. A ring-shaped opening matching the arc opening of the main bearing frame (2) is arranged on the surface of the rotary working disk (7), and a flange surface clamping mechanism is arranged on the side facing away from the main bearing frame (2).

3. The welding positioner for H-shaped steel processing according to claim 2, characterized in that: The web clamping assembly (403) is composed of a clamping plate (4031), a tube body (4032), a resistance rod (4033) and a first spring (4034), wherein the clamping plate (4031) is sleeved on the outer surface of the first bidirectional lead screw (402) through threaded engagement, a built-in accommodating cavity is provided at the top of the clamping plate (4031), a detachably mounted tube body (4032) is placed in the accommodating cavity, the resistance rod (4033) movably inserted in the tube body (4032) extends in a direction pointing toward the H-shaped steel, and a first spring (4034) sleeved on the surface of the resistance rod (4033) is provided at the outer end of the clamping plate (4031), and the top of the accommodating cavity is defined as a packaging plate (4035).

4. The welding positioner for H-shaped steel processing according to claim 3, characterized in that: The top of the main bearing frame (2) is equipped with a lubricating nozzle (11) located above the guide roller (12). The elastic reset oil cylinder (409) is composed of an oil cylinder body (4091), a piston push rod (4092), a second spring (4093), a one-way valve (4094) and an oil pipeline (4095). The oil cylinder body (4091) is rotatably connected to the end of the oil cylinder mounting shaft (410), and a baffle structure with a through hole is provided on the top of the inner cavity thereof. The piston push rod (4092) is inserted into the oil cylinder body (4091) in a sliding manner and is connected to the partition through the second spring (4093); a closed liquid cavity is formed above the baffle, and the side walls of the liquid cavity are respectively installed with a one-way valve (4094) for draining and inletting liquid. One of the paths is connected to the lubrication nozzle (11) through a flow channel formed by the one-way valve (4094) and the oil pipeline (4095), and the other path is connected to the oil supply system through the one-way valve (4094).

5. The welding positioner for H-shaped steel processing according to claim 1, characterized in that: The track base (1) adopts an integrally formed structure, wherein a track groove is provided on its top wall and a gear track is provided on its inner side wall; the bottom walls at the left and right ends of the main supporting frame (2) are slidably engaged with the track groove, and a track gear (10) is provided on the inner side of each track base (1), the track gear (10) is meshed with the gear track and is coaxially mounted with a rotating shaft that passes through the chassis of the main supporting frame (2), and a power transmission assembly (9) is provided at the top end of the rotating shaft.

6. The welding positioner for H-shaped steel processing according to claim 1, characterized in that: The top of the main supporting frame (2) is provided with an arc opening, and the first lifting assembly (3) is composed of a first one-way screw rod (301), a first transmission shaft (302), a first commutator (303) and a first transmission part (304), wherein the first one-way screw rod (301) is symmetrically arranged on the left and right and extends longitudinally along both sides of the arc opening of the main supporting frame (2), and the top end is rotatably connected to the shaft seat; the first transmission shaft (302) is arranged parallel to the chassis of the main supporting frame (2), and its two ends are transmission-connected to the bottom end of the first one-way screw rod (301) through the first commutator (303), and is connected to the drive device via the first transmission part (304) to form a power transmission link.

7. The welding positioner for H-shaped steel processing according to claim 6, characterized in that: The first commutator (303) includes a housing (3033) installed on the side wall of the main bearing frame (2), inside which a vertically arranged meshing vertical screw roller (3031) and a horizontal gear (3032) are disposed, and the two are rigidly connected to the first one-way lead screw (301) and the first transmission shaft (302) respectively by means of shaft-end socketing.

8. The welding positioner for H-shaped steel processing according to claim 6, characterized in that: The first transmission part (304) includes belt pulleys assembled on the first transmission shaft (302) and the output shaft of the driving device, and a synchronous belt connecting the two.

9. The welding positioner for H-shaped steel processing according to claim 3, characterized in that: The transmission groove and the side wall of the main bearing frame (2) are respectively provided with transverse and longitudinal guide rails, and the web clamping assembly (403) and the back side of the first lifting platform (401) are correspondingly configured with strip structures adapted to the direction of the guide rails; a power transmission assembly (9) for driving the first bidirectional lead screw (402) is further assembled in the middle of the first lifting platform (401); a jaw structure is provided at the end of the transfer push rod (404).

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