Welding positioner for H-shaped steel machining

Abstract

The invention relates to the technical field of welding displacement, and discloses a welding positioner for H-shaped steel machining, which comprises two rail bases arranged in parallel, and a transposition clamping system in mirror image distribution is arranged above the rail bases; the transposition clamping system is composed of a main bearing rack arranged above the track base in a transmission mode, a flange face clamping mechanism and a web face clamping mechanism, and the flange face clamping mechanism and the web face clamping mechanism are assembled on the inner side and the outer side of the main bearing rack respectively. The flange face clamping mechanism is composed of a second lifting assembly and a second clamping assembly, and a rotary working disc for adjusting the angle of the flange face clamping mechanism is arranged on the side wall of the main bearing rack. A workpiece can be overturned by + / -90 degrees by rotating the working disc, and the flange face clamping mechanism and the web face clamping mechanism are matched for alternate pipe connection, so that the welding device can conduct barrier-free full-circumference welding.

Description

Technical Field

[0001] The invention relates to the technical field of welding positioner, and more specifically 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 the intensity of manual labor, 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 the 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, which is arranged on the supporting part to fix the workpiece; a driving part, which is connected to the supporting part to drive it to rotate; and a supporting guide, which is used to support the supporting part and provide guidance for its rotational movement.

[0003] Although the existing technical solution can realize the clamping and angle adjustment functions of the workpiece and adjust the surface to be welded to a suitable position, it is found that there are significant technical defects in actual application: when the supporting part is adjusted by rotating the angle, the clamping device may produce synchronous displacement, causing it to enter the operating trajectory 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 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 welding operation trajectory interference 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 H-shaped steel processing, comprising two track bases arranged in parallel, a mirror-distributed transposition clamping system is arranged above the track base, the transposition clamping system is composed of a main bearing frame which is transmission-arranged above the track 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 arranged on the side wall of the main bearing frame; The first clamping assembly includes a first lifting platform, a first bidirectional lead screw and a web clamping assembly, wherein the first lifting platform adopts an integrally formed structure, including two side wing plates and a transmission groove in the middle; the wing plate is threadedly connected to the first unidirectional lead screw, and the first bidirectional lead screw is rotatably installed in the transmission groove; the surface of the first bidirectional lead screw is threadedly connected to the mirror-distributed web clamping assembly; the second lifting assembly is fixedly installed on the rotating work disk, and the second clamping assembly is assembled on the second lifting assembly; the rotating work disk completes the ±90° 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 perform full-circle welding without obstacles.

[0006] Furthermore, an arc-shaped positioning slot is installed on the outer side of the arc opening of the main supporting frame, and a plurality of guide rollers are evenly distributed in the circumferential direction of the outer periphery; the rotating working disk adopts an integrally formed structure, including a limiting ring edge, an arc-shaped groove and annular teeth, the limiting ring edge is embedded in the arc-shaped positioning slot, the arc-shaped groove cooperates with the guide roller for positioning, and the annular teeth form an engaging transmission with the disk driving gear arranged at the bottom center of the main supporting frame; the disk driving gear is connected to the output end of the driving device; the surface of the rotating working disk is provided with an annular opening matching the arc opening of the main supporting frame, and a flange surface clamping mechanism is provided on the side facing away from the main supporting frame.

[0007] Furthermore, the web clamping assembly is composed of a clamping main plate, a tube body, a resistance rod and a first spring, wherein the clamping main plate is sleeved on the outer surface of the first bidirectional lead screw by threaded fitting, a built-in accommodating cavity is provided at the top of the clamping main plate, a detachably installed tube body is placed in the accommodating cavity, the resistance rod movably inserted in the tube body extends in the direction pointing to the H-shaped steel, and a first spring sleeved on the surface of the resistance rod is provided at the outer end of the clamping main plate, and the top of the accommodating cavity is defined as a packaging plate.

[0008] Furthermore, the first clamping assembly also includes a push rod, a fence, a positioning shaft, a cross lever arm, a pressure plate and an elastic reset cylinder, wherein the fence is detachably mounted on the side wall of the first lifting platform, the push rod is installed on the web clamping assembly, a positioning shaft is vertically arranged at the center of the fence, and two cross lever arms are rotatably mounted on the surface of the positioning shaft and are cross-distributed and staggered front and back. The cross lever arm extends downward from the positioning shaft to the left and right sides and forms a rotation arc at the lowest point before continuing to extend to the side of the H-shaped steel, and its distal end is hinged to the pressure plate through a bolt shaft, and at the same time, the downward section of the cross lever arm is connected to the telescopic end of the elastic reset cylinder, and the elastic reset cylinder is rotatably mounted on the side wall of the fence through the cylinder mounting shaft.

[0009] Furthermore, a lubrication nozzle located above the guide roller is installed on the top of the main bearing frame, 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 one-way valves for discharging and inletting liquid are respectively installed on the side walls of the liquid cavity, one of which is connected to the lubrication 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.

[0010] Furthermore, the track base adopts an integrally formed structure, with a track groove on the top wall and a gear track on the inner side wall; 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 a 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.

[0011] Furthermore, an arc opening is provided on 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 symmetrically arranged 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 shaft seat; the first transmission shaft is arranged parallel to the chassis of the main bearing frame, and its two ends are transmission-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.

[0012] Furthermore, the first commutator comprises an outer shell mounted on the side wall of the main bearing frame, and a vertical screw roller and a horizontal gear are vertically arranged 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 sleeve connection.

[0013] Furthermore, the first transmission part includes a pulley mounted on the first transmission shaft and the output shaft of the driving device, and a synchronous belt connecting the two.

[0014] 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 push rod is provided with a jaw structure.

[0015] Technical effects and advantages of the present invention: The present invention realizes the precise positioning and clamping of the web and flange of the H-beam through the coordinated adjustment of the flange surface clamping mechanism and the web surface clamping mechanism; utilizes a rotating working 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 and positioning, and realized workpiece flipping, which effectively solves the positioning problem of multi-sided welding of H-beams and significantly improves welding accuracy and efficiency.

[0016] 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 characteristic 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. The integrated system realizes the three 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

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the connection between the transposition clamping system and the track base on one side.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.

[0020] Figure 4 For the present invention Figure 2 Orthographic projection of the single side view of the structure.

[0021] Figure 5 For the present invention Figure 2 Schematic diagram of the connection structure between the middle main bearing frame and the web surface clamping mechanism.

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point B in the middle.

[0023] Figure 7 For the present invention Figure 5 Schematic diagram of the structure at point C in the middle.

[0024] Figure 8 It is a schematic diagram of the first clamping assembly structure of the present invention.

[0025] Fig. 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.

[0026] Fig.10 It is a schematic diagram of the connection structure of the main bearing frame, the flange surface clamping mechanism and the rotating working disk of the present invention.

[0027] Fig.11 It is a schematic diagram of the flange surface clamping mechanism and the rotating working disk connection structure of the present invention.

[0028] Fig.12 For the present invention Fig.11 Detailed diagram showing the rotating working disc on the other side of the middle structure.

[0029] The accompanying drawings are marked as follows: 1. track base; 2. main bearing frame; 3. first lifting assembly; 301. first unidirectional screw rod; 302. first transmission shaft; 303. first commutator; 3031. vertical screw roller; 3032. horizontal gear; 3033. outer shell; 304. first transmission part; 4. first clamping assembly; 401. first lifting platform; 402. first bidirectional screw rod; 403. web clamping assembly; 4031. clamping total plate; 4032. tube body; 4033. abutment rod; 4034. first spring; 4035. packaging plate; 404. recursive rod; 405. fence; 406. positioning shaft; 407. cross lever arm; 408. pressure-resistant plate; 409. elastic reset cylinder; 4091. oil Cylinder body; 4092, piston push rod; 4093, second spring; 4094, one-way valve; 4095, oil pipeline; 410, cylinder mounting shaft; 5, second lifting assembly; 501, second one-way screw; 502, second transmission shaft; 503, second commutator; 504, second transmission part; 6, second clamping assembly; 601, second lifting platform; 602, second two-way screw; 603, flange clamping assembly; 7, rotating working disk; 8, disk driving gear; 9, power transmission assembly; 901, box; 902, output gear; 903, intermediate gear; 904, transmission screw; 905, reversible motor; 10, track gear; 11, lubrication nozzle; 12, guide roller; 13, arc positioning slot. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The welding positioner for H-shaped steel processing involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] Reference Figure 1-Figure 12The present invention provides a welding positioner for H-shaped steel processing, comprising two parallel track bases 1, a mirror-distributed transposition clamping system is arranged above the track base 1, and the transposition clamping system is composed of a main bearing frame 2 which is transmission-arranged 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 arranged on the side wall of the main bearing frame 2, forming an adjustable double-station clamping device; 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 wall is provided with a gear track; the bottom walls at the left and right ends of the main bearing 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, 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 bearing frame 2, and a power transmission assembly 9 is configured at the top of the rotating shaft; the power transmission assembly 9, as a kinetic energy supply device, 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 bearing frame 2 through the track groove guide of the track base 1 and the gear track transmission of the track gear 10; The power transmission assembly 9 is composed of a box 901, an output gear 902, an intermediate gear 903, a transmission screw 904 and a reversible motor 905, wherein the box 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 box 901; the transmission screw 904 is coaxially assembled with the output shaft of the reversible motor 905, and its side teeth are meshed with the end teeth of the intermediate gear 903, and at the same time, 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; The two sets of power transmission assemblies 9 for driving 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 stable synchronous displacement; In this article, all the positional relationships we discuss about front, back, left, and right are based on Figure 1-Figure 4The directions are defined by the perspective presented. These directions do not have actual geographical or physical meaning. They are just a reference frame set to help readers understand the content of the article more intuitively. In this way, we can show the relative position relationship between the various parts more clearly, making the entire discussion process easier to understand and follow. Please note that this custom direction mark is only for internal use in this article and does not represent any absolute direction or position in the real world. The cross-sectional structure of H-shaped steel consists of the following three parts: two parallel horizontal parts are called flanges (or side plates, edges); the vertical connecting part in the middle 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.

[0032] Reference Figure 2-Figure 5 , Figure 7 , Fig. 9 and Figure 10-12 , an arc opening is provided at the top of the main bearing frame 2, one side of which is a web surface clamping mechanism, the web surface clamping mechanism 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 screw rod 301, a first transmission shaft 302, a first commutator 303 and a first transmission part 304, wherein the left-right symmetrically arranged first one-way screw rod 301 extends longitudinally along both sides of the arc opening of the main bearing 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 bearing 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 connected to the drive device through the first transmission part 304 to form a power transmission link; The first clamping assembly 4 includes a first lifting platform 401, a first bidirectional lead screw 402 and a web clamping assembly 403, wherein the first lifting platform 401 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 first unidirectional lead screw 301, and the first bidirectional lead screw 402 is rotatably installed in the transmission groove; the surface of the first bidirectional lead screw 402 is threadedly connected to the web clamping assembly 403 distributed in a mirror image; 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 a clamping strip structure adapted to the direction of the guide rail; the middle part of the first lifting platform 401 is also equipped with a power transmission assembly 9 for driving the first bidirectional lead screw 402; An arc-shaped positioning slot 13 is installed on the outer side of the arc opening of the main bearing frame 2, and a plurality of guide rollers 12 are evenly distributed in the circumferential direction of the outer periphery; the rotating working disk 7 adopts an integrally formed structure, including a limiting ring edge, an arc-shaped groove and a ring tooth, the limiting ring edge is embedded in the arc-shaped positioning slot 13, the arc-shaped groove cooperates with the guide roller 12 for positioning, and the ring tooth forms a meshing transmission with the disk driving gear 8 arranged at the bottom center of the main bearing frame 2; the disk driving gear 8 is connected to the output end of the driving device; the surface of the rotating working disk 7 is provided with an annular opening matching the arc opening of the main bearing frame 2, and a flange surface clamping mechanism is provided on the side facing away from the main bearing frame 2; In this embodiment, it should be specifically explained that the driving device can be a servo motor or other power output device adapted to the first transmission part 304, the second transmission part 504 and the disk driving gear 8; The first commutator 303 comprises an outer shell 3033 mounted on the side wall of the main bearing frame 2, wherein a meshing vertical screw roller 3031 and a horizontal gear 3032 are vertically arranged inside the outer shell, and the two are rigidly connected to the first one-way screw rod 301 and the first transmission shaft 302 through shaft end sleeve connection respectively; the meshing transmission vertical screw roller 3031 and the horizontal gear 3032 realize the conversion of horizontal torque to vertical direction, and the structure allows the use of other equivalent torque reversing devices instead; 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; The output gear 902 in the power transmission assembly 9 is rigidly connected to the first bidirectional lead screw 402, and the output torque is directly transmitted to the first bidirectional lead screw 402, so as to achieve precise adjustment of its forward and reverse rotation; the surface of the first bidirectional lead screw 402 is provided with a mirror-symmetrically distributed thread structure; The flange surface clamping mechanism includes two components, a second lifting assembly 5 and a second clamping assembly 6; wherein 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 501, a second transmission shaft 502, a second commutator 503 and a second transmission part 504: the symmetrically arranged second one-way screw 501 extends parallel to the side of the annular opening of the rotating working disk 7, and one end thereof is rotatably connected through an axle seat; the two ends of the first transmission shaft 302 arranged parallel to the chassis of the rotating working disk 7 are respectively connected to the bottom end of the second one-way screw 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, and the specific connection method can be clearly understood by those skilled in the art, so it will not be repeated; The second clamping assembly 6 includes a second lifting platform 601, a second bidirectional lead screw 602 and a flange clamping component 603, wherein the second lifting platform 601 adopts an integrally formed structure, including two side wing plates and a transmission groove in the middle; the wing plate is 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 mirror-distributed flange clamping component 603; the transmission groove and the side walls of the rotating working disk 7 are respectively provided with guide rails, and the flange clamping component 603 and the back side of the second lifting platform 601 are correspondingly configured with a clamping strip structure adapted to the direction of the guide rails; the middle part of the second lifting platform 601 is also equipped with a power transmission assembly 9 for driving the second bidirectional lead screw 602; the second clamping assembly 6 has the same structural configuration and working mechanism as the first clamping assembly 4, and the specific connection method can be clearly understood by those skilled in the art, so it is not repeated here; The relative end face heights of the two symmetrically arranged flange clamping assemblies 603 exceed the size of the H-shaped steel flange, and a highly efficient load-bearing structure is formed through surface contact.

[0033] Reference Figure 4-Figure 6 , Figure 8 and Fig. 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, wherein the clamping main plate 4031 is sleeved on the outer surface of the first bidirectional lead screw 402 through threaded matching, a built-in accommodating cavity is provided at the top of the clamping main plate 4031, a detachably mounted tube body 4032 is placed in the accommodating cavity, the resisting rod 4033 movably inserted in the tube body 4032 extends in a direction pointing to 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, and the top of the accommodating cavity is defined as a packaging plate 4035; The first clamping assembly 4 also includes a push rod 404, a fence 405, a positioning shaft 406, a cross lever arm 407, a pressure plate 408 and an elastic reset cylinder 409, wherein the fence 405 is detachably mounted on the side wall of the first lifting platform 401, the push rod 404 is mounted on the web clamping assembly 403, a positioning shaft 406 is vertically arranged at the center of the fence 405, and two cross lever arms 407 are rotatably mounted on the surface of the positioning shaft 406 and are staggered and cross-distributed in the front and back directions. The cross lever arm 407 extends downwardly from the positioning shaft 406 to the left and right sides and forms a rotation arc at the lowest point and then continues to extend to the side of the H-shaped steel. The distal end thereof is hinged to the pressure plate 408 through a bolt shaft, and at the same time, the downward section of the cross lever arm 407 is connected to the telescopic end of the elastic reset cylinder 409, and the elastic reset cylinder 409 is rotatably mounted through a cylinder mounting shaft 410, and the cylinder mounting shaft 410 is mounted on the side wall of the fence 405.

[0034] In this embodiment, it should be specifically explained that a jaw structure is provided at the end of the recursive rod 404. When the abutment rod 4033 is in contact with the H-shaped steel and generates elastic compression, the recursive rod 404 has 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 axis until the pressure plate 408 is completely pressed against the surface of the steel. At this time, the abutment rod 4033 is still within its elastic displacement range. A lubricating nozzle 11 located above the guide roller 12 is installed on the top of the main bearing frame 2, and the elastic reset cylinder 409 consists of a cylinder body 4091, a piston push rod 4092, a second spring 4093, a one-way valve 4094 and an oil pipeline 4095, wherein the cylinder body 4091 is rotatably connected to the end of the cylinder mounting shaft 410, and a baffle structure with a through hole is provided on the top of its inner cavity; the piston push rod 4092 is slidably inserted into the cylinder body 4091 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 one-way valves 4094 for discharging and inletting liquid, one of which is connected to the lubricating nozzle 11 through a flow channel formed by the one-way valve 4094 and the oil pipeline 4095, and the other is connected to the oil supply system (which can be connected to the oil supply tank structure) through the one-way valve 4094.

[0035] Working principle of the present invention: First, adjust the spacing between the two groups of transposition clamping systems to adapt them to the optimal load-bearing position of the H-shaped steel. The specific implementation method is: output torque through the power transmission assembly 9, and the torque is transmitted to the rotating shaft coaxially connected with the track gear 10, driving the track gear 10 to move along the inner rack 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; 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 transmits the torque to the output gear 902 through the intermediate gear 903 meshing therewith, thereby driving the output gear 902 coaxial with the track gear 10 to rotate synchronously, and finally completing the precise positioning adjustment of the two groups of transposition clamping systems; 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 synchronously distributes the torque 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 the same direction of rotation, thereby driving the first clamping assembly 4 connected by the thread to produce a vertical displacement. By switching the servo motor direction, the lifting movement of the first clamping assembly 4 is controlled to accurately position to the preset height; then start the power transmission assembly 9 for adjusting the lateral position of the first clamping assembly 4, the output torque of the power transmission assembly 9 is transmitted to the first bidirectional lead screw 402 through the output gear 902, and the rotational movement of the first bidirectional lead 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), and finally achieve stable clamping and precise height positioning of the H-shaped steel web, ensuring that the welding device can weld the upper exposed flange without obstacles (such as metal pick welding); After the upper flange welding of the H-shaped steel is completed, the servo motor connected to the disk drive gear 8 is started, and the motor provides torque to the disk drive gear 8 and drives the rotating working disk 7 meshing therewith to rotate, so that the rotating working disk 7 makes 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 motor output direction, 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, 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 turning over 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 the surface; by alternately taking over the flange surface and the web surface clamping mechanism, the full-circle welding operation of the H-shaped steel is realized; When the left and right web clamping assemblies 403 move toward each other to position the H-shaped steel web, the abutment rod 4033 first contacts the web and elastically contracts into the tube body 4032 under the action of contact pressure, gradually increasing the clamping force; at the same time, the reciprocating rod 404 connected to the outside of the web clamping assembly 403 moves horizontally along the slide groove of the fence 405, pushing the cross lever arms 407 arranged in a cross-displaced manner to rotate toward each other around the axis of the positioning shaft 406 - the left reciprocating rod 404 pushes the upper right rod body of the left cross lever arm 407, and the right reciprocating rod 404 pushes the upper left rod body of the right cross lever arm 407, so that the pressure-resistant plate 408 connected by the bolt shaft adaptively fits the two sides of the web to form a surface contact auxiliary clamping, which not only expands the force-bearing area but also realizes flexible pressure. The linkage mechanism cooperates with the lever movement of the cross lever arm 407 through the elastic contraction of the abutment rod 4033 to ensure that the clamping process is stable and avoids rigid impact; Furthermore, when the left and right cross lever arms 407 rotate toward each other around the positioning shaft 406, the piston push rod 4092 directly connected thereto will pull the elastic reset oil cylinder 409 as a whole to deflect with the oil cylinder mounting shaft 410 as the axis, and at the same time, the piston push rod 4092 compresses the second spring 4093 inward along the oil cylinder body 4091 to cause it to produce elastic deformation and accumulate potential energy; in this way, when the reciprocating rod 404 moves in the opposite direction with the web clamping assembly 403 to release the thrust on the cross lever arm 407, the elastic restoring force of the second spring 4093 will push the cross lever arm 407 to rotate synchronously, ensuring that the cross lever arm 407 always maintains coordinated movement with the web clamping assembly 403. The elastic reset mechanism realizes the automatic reset function of the clamping assembly when the force is released through the energy storage-energy release characteristics of the elastic reset oil cylinder 409; Furthermore, during the energy storage and release process of the elastic reset cylinder 409, the piston push rod 4092 will cause a change in the pressure of the inner cavity when it telescopes along the cylinder body 4091: when the piston push rod 4092 compresses the cylinder body 4091, the lubricating oil in the cavity is squeezed out, discharged through the one-way valve 4094 connected to the oil pipeline 4095, and finally sprayed to the surface of the guide roller 12 through the lubricating nozzle 11, effectively reducing the friction resistance and noise during the operation of the rotating working disk 7; when the piston push rod 4092 is retracted, a negative pressure is formed in the 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, the reciprocating motion of the elastic reset cylinder 409 also realizes continuous self-lubrication of the guide roller 12, and the two-way oil circuit design of the one-way valve 4094 ensures the circulation supply of the lubricating oil.

[0036] 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 technician familiar with the technical field can make equivalent substitutions or modifications within the technical scope disclosed by the present invention; according to the technical plan and its improved conception of the present invention, all of which should be included under the protection of the present invention.

Claims

1. A welding positioner for processing H-shaped steel, comprising two rail bases (1) arranged in parallel, wherein a mirror-distributed position change clamping system is arranged above the rail bases (1), characterized in that: The transposition clamping system comprises a main bearing frame (2) which is transmission-arranged above a track base (1) and a flange surface clamping mechanism and a web surface clamping mechanism which are respectively mounted 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) 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) comprises a first lifting platform (401), a first bidirectional lead screw (402) and a web clamping assembly (403), wherein the first lifting platform (401) is an integrally formed structure, comprising two side wing plates and a transmission groove in the middle; the wing plates are threadedly connected to the first unidirectional lead screw (301), and the first bidirectional lead screw (402) is rotatably installed in the transmission groove; the surface of the first bidirectional lead screw (402) is threadedly connected to the symmetrically distributed web clamping assemblies (403); the second lifting assembly (5) is fixedly installed on the rotating working disk (7), and the second clamping assembly (6) is assembled on the second lifting assembly (5); the rotating working disk (7) completes the ±90° 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 perform full-circle welding without obstacles.

2. The welding positioner for H-shaped steel processing according to claim 1 is characterized in that: An arc-shaped positioning slot (13) is installed outside the arc opening of the main bearing frame (2), and a plurality of guide rollers (12) are evenly distributed in the circumferential direction of the outer periphery; the rotating working disk (7) adopts an integrally formed structure, comprising a limiting ring edge, an arc-shaped groove and a ring tooth, the limiting ring edge is embedded in the arc-shaped positioning slot (13), the arc-shaped groove cooperates with the guide roller (12) for positioning, and the ring tooth forms a meshing transmission with a disk driving gear (8) arranged at the bottom center of the main bearing frame (2); the disk driving gear (8) is connected to the output end of the driving device; the surface of the rotating working disk (7) is provided with an annular opening matching the arc opening of the main bearing frame (2), and a flange surface clamping mechanism is provided on the side of the rotating working disk (7) facing away from the main bearing frame (2).

3. The welding positioner for H-shaped steel processing according to claim 2 is characterized in that: The web clamping assembly (403) is composed of a clamping main plate (4031), a tube body (4032), a resistance rod (4033) and a first spring (4034), wherein the clamping main plate (4031) is sleeved on the outer surface of the first bidirectional lead screw (402) by threaded fitting, a built-in accommodating cavity is provided at the top of the clamping main 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 to 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 main 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 1 or 3, characterized in that: The first clamping assembly (4) further comprises a reciprocating rod (404), a fence (405), a positioning shaft (406), a cross lever arm (407), a pressure plate (408) and an elastic reset cylinder (409), wherein the fence (405) is detachably mounted on the side wall of the first lifting platform (401), the reciprocating rod (404) is mounted on the web clamping assembly (403), a positioning shaft (406) is vertically arranged at the center of the fence (405), and two positioning shafts (406) are rotatably mounted on the surface of the positioning shaft (406). A cross lever arm (407) is supported, which is staggered and cross-distributed in the front and rear directions. The cross lever arm (407) extends downward from the positioning axis (406) to the left and right sides and forms a rotation arc at the lowest point, and then continues to extend to the side of the H-shaped steel. The distal end of the cross lever arm (407) is hinged to the pressure plate (408) through a bolt axis. At the same time, the downward section of the cross lever arm (407) is connected to the telescopic end of the elastic reset cylinder (409). The elastic reset cylinder (409) is rotatably installed on the side wall of the fence (405) through the cylinder installation axis (410).

5. The welding positioner for H-shaped steel processing according to claim 4 is characterized in that: The top of the main bearing frame (2) is equipped with a lubrication 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 at the top of its inner cavity; 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 discharging and inletting liquid, one of which 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 is connected to the oil supply system through the one-way valve (4094).

6. The welding positioner for H-shaped steel processing according to claim 1, characterized in that: The track base (1) 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 (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 installed with a rotating shaft that passes through the chassis of the main supporting frame (2), and a power transmission assembly (9) is arranged at the top end of the rotating shaft.

7. The welding positioner for H-shaped steel processing according to claim 1, characterized in that: The top of the main bearing frame (2) is provided with an arc opening, one side of which is a web surface clamping mechanism, the web surface clamping mechanism 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 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 and extends longitudinally along both sides of the arc opening of the main bearing 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 bearing 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 through the first transmission part (304) to form a power transmission link.

8. The welding positioner for H-shaped steel processing according to claim 7, characterized in that: The first commutator (303) comprises an outer shell (3033) mounted on the side wall of the main bearing frame (2), wherein a vertical screw roller (3031) and a horizontal gear (3032) 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 (301) and the first transmission shaft (302) respectively by means of shaft end sleeve connection.

9. The welding positioner for H-shaped steel processing according to claim 7, characterized in that: The first transmission part (304) comprises a pulley mounted on the first transmission shaft (302) and the output shaft of the driving device, and a synchronous belt connecting the two.

10. The welding positioner for H-shaped steel processing according to claim 4, 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 provided with a clamping strip structure adapted to the direction of the guide rails; the middle part of the first lifting platform (401) is also equipped with a power transmission assembly (9) for driving the first bidirectional lead screw (402); and the end of the reciprocating rod (404) is provided with a jaw structure.

Images