Net rack structure lower chord ball joint welding device

Abstract

The invention relates to the field of net rack welding, in particular to a net rack structure lower chord ball joint welding device which comprises a welding table, an arc-shaped positioning groove used for containing a ball joint is formed in the upper end of the welding table in a penetrating mode, and the ball joint can transversely and longitudinally rotate in the arc-shaped positioning groove to adjust the welding point position. A receding opening is formed in the side plate in a penetrating mode, an angle adjusting clamping mechanism is arranged on the side plate, the angle adjusting clamping mechanism comprises a bearing plate, clamping arc plates are rotationally installed on the two sides of the bearing plate and used for clamping and fixing the rod piece, and one end of the bottom of the bearing plate is rotationally matched with the movable plate. The deflection motor is used for driving the welding gun to swing so that the welding gun can be accurately aligned with the joint position of the rod piece and the ball joint, the mounting plate is matched to drive the welding gun to crawl along the welding support, the continuous annular automatic welding process can be conducted around the rod piece, and the welding quality and the welding efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grid welding, and particularly to a welding device for the lower chord spherical node of a grid structure. Background Art

[0002] A grid structure is a space structure formed by connecting multiple rods in a certain grid form through nodes, which has the advantages of small space stress, light weight, large stiffness, good seismic performance, etc., and can be used as the roof of buildings such as gymnasiums, cinemas, exhibition halls, waiting halls, stadium grandstand canopies, aircraft hangars, workshops with large column spacings in two directions, etc.

[0003] In a grid structure, it is usually necessary to weld multiple metal rods around a spherical node to form a fixed support connection structure. At present, the welding process between the spherical node and the rod usually adopts manual welding. Since the rod and the spherical node are in annular contact, it is necessary for the welder to weld around the rod and align the weld seam, which requires a relatively high welding proficiency of the welder. At the same time, when manually performing annular welding, intermittent situations are likely to occur, seriously affecting the welding efficiency and welding quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding device for the lower chord spherical node of a grid structure, aiming to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A welding device for the lower chord spherical node of a grid structure includes a welding table. An arc-shaped positioning groove for placing the spherical node is provided through the upper end of the welding table. The spherical node can rotate horizontally and vertically in the arc-shaped positioning groove to adjust the welding position. A side plate is fixedly arranged on one side of the welding table. An avoidance opening is provided through the side plate. An angle-adjusting clamping mechanism is arranged on the side plate. The angle-adjusting clamping mechanism includes a bearing plate. Clamping arc plates are rotatably installed on both sides of the bearing plate. The clamping arc plates are used to clamp and fix the rod. One end of the bottom of the bearing plate is rotatably matched with a movable plate. The movable plate is used to adjust the height and angle of the rod during welding.

[0007] A lifting cylinder is fixedly arranged on the side plate. The output end of the lifting cylinder is connected with an annular welding mechanism. The annular welding mechanism includes a group of welding brackets arranged in a semi-circular shape. The welding brackets are enclosed to form a ring for the rod to pass through concentrically. A welding component is arranged on the welding bracket. The welding component includes a mounting plate. A deflection motor is fixedly arranged on the mounting plate. The output end of the deflection motor is fixedly connected with a support. A welding torch is fixedly arranged in the support. The deflection motor drives the welding torch to swing so that the welding torch faces the joint position between the rod and the spherical node. The mounting plate drives the welding torch to crawl along the welding bracket to achieve continuous annular welding.

[0008] As a further solution of the present invention: a row of guide rollers are rotatably installed on the surface of the supporting plate, a slide rail is provided at the bottom of the supporting plate, a slider is slidably installed on the slide rail, a locking bolt is provided at the bottom of the slider, the bottom of the slider is rotatably connected to one end of the support rod, and the other end of the support rod is rotatably connected to the movable plate.

[0009] As a further solution of the present invention: guide rods are fixedly provided at both ends of the bottom of the movable plate, the guide rods slide through the mounting seat, the mounting seat is fixedly installed on the side plate, a driving motor is fixedly installed on the upper end of the mounting seat, the output end of the driving motor is connected to a height adjustment gear, a longitudinal tooth groove is provided on one side of the movable plate, the longitudinal tooth groove penetrates the mounting seat, and the height adjustment gear is meshed with the longitudinal tooth groove.

[0010] As a further solution of the present invention: raised portions are arranged at intervals on the top of the clamping arc plate, and the raised portions of the clamping arc plates on both sides are staggered for closing and clamping, positioning holes are penetrated through the raised portions, positioning rods are passed through the positioning holes, and rubber pads are fixedly arranged on the inner walls of the clamping arc plates.

[0011] As a further solution of the present invention: a positioning plate is extended from one side of the welding bracket, and the positioning plates on both sides are combined to form a limiting hole, and the positioning rod continues to pass through the limiting hole after passing through the positioning hole.

[0012] As a further solution of the present invention: the lifting cylinder is fixedly installed on the cylinder seat, the cylinder seat is fixedly connected to the side plate, the output end of the lifting cylinder is connected to the fixed plate, sliding frames are provided at both ends of the bottom of the fixed plate, a sliding block is installed in the sliding frame for sliding up and down, a return spring is provided between the bottom of the sliding block and the sliding frame, a follower shaft is fixedly provided between the two sliding blocks, a rotating frame is rotatably installed on the follower shaft, and the top ends of the two welding brackets are rotatably matched with the rotating frame.

[0013] As a further solution of the present invention: an annular tooth groove is arranged on the inner wall of the welding bracket, an annular track is arranged on the side wall of the welding bracket, a docking locking block is arranged at the bottom of one of the welding brackets, and a notch is arranged correspondingly at the bottom of the other welding bracket, and the docking locking block is buckled in the notch to close and lock the welding bracket.

[0014] As a further solution of the present invention: a creeping motor is fixedly arranged on one side of the mounting plate, a creeping gear is connected to the output end of the creeping motor, the creeping gear is meshed with the annular tooth groove, a supporting slide is extended from the end of the mounting plate, an auxiliary roller is rotatably installed in the supporting slide, the supporting slide is slidably installed in the annular track, and the auxiliary roller rolls against the side wall of the welding bracket.

[0015] As a further solution of the present invention: a top plate is fixedly arranged at the top end of the side plate, a pressing cylinder is fixedly arranged on the top plate, the output end of the pressing cylinder is connected with a pressing disc, the pressing disc is located directly above the spherical joint, a spherical surface groove is arranged at the bottom of the pressing disc, an installation groove is arranged through the center of the spherical surface groove, an electric telescopic rod is fixedly arranged in the installation groove, the end of the electric telescopic rod is fixedly connected with an installation block, and a rolling ball is installed in the installation block in a rolling manner.

[0016] As a further solution of the present invention: a pair of transverse adjusting wheels are rotatably installed on the left and right sides at the upper end of the arc-shaped positioning groove, the transverse adjusting wheels are driven to rotate by a first motor, a pair of longitudinal adjusting wheels are rotatably installed on the front and rear sides at the bottom end of the arc-shaped positioning groove, the longitudinal adjusting wheels are driven to rotate by a second motor, and both the transverse adjusting wheels and the longitudinal adjusting wheels are abutted against the surface of the spherical joint.

[0017] The beneficial effects of the present invention:

[0018] (1) When preparing for welding, the spherical joint is placed into the arc-shaped positioning groove. The spherical joint can adjust the welding position through horizontal and vertical rotation. At the same time, the rod member can adjust the height and angle during welding through the movable plate, so as to meet the welding requirements of different grid structures.

[0019] (2) By setting the annular welding mechanism, during welding, the welding bracket will deflect synchronously along with the swinging process of the bearing plate, so that the rod member always remains on the axis position of the welding bracket. At the same time, the deflection motor drives the welding torch to swing, so that the welding torch can accurately align with the joint position between the rod member and the spherical joint. Cooperating with the process of the mounting plate driving the welding torch to crawl along the welding bracket, a continuous annular automatic welding process can be carried out around the rod member, which is beneficial to improving the welding quality and welding efficiency.

[0020] (3) When preparing for welding, the spherical joint is placed in the arc-shaped positioning groove. At the same time, the electric telescopic rod pushes the mounting block downward, so that the mounting block extends out of the installation groove until the rolling ball abuts against the top end of the spherical joint. At this time, it is a "point contact" between the rolling ball and the spherical joint. While the rolling ball positions and presses the spherical joint, it does not prevent the spherical joint from carrying out normal rotation adjustment process. After adjustment, the electric telescopic rod pulls the mounting block upward, so that the rolling ball retracts into the installation groove. At the same time, the pressing cylinder pushes the pressing disc downward, so that the pressing disc abuts against the top end of the spherical joint. At this time, it is a "surface contact" between the pressing disc and the spherical joint, so that the spherical joint remains fixed during welding, improving the welding stability. Description of the Drawings

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the welding table in the present invention.

[0024] Figure 3 It is a schematic diagram of the bottom structure of the welding table in the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the angle-adjusting clamping mechanism in the present invention.

[0026] Figure 5 It is another schematic diagram of the structure of the angle-adjusting clamping mechanism in the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the circular welding mechanism in the present invention.

[0028] Figure 7 is Figure 6 an enlarged schematic diagram of part A in

[0029] Figure 8 It is a schematic diagram of the structure of the welding bracket in the present invention.

[0030] Figure 9 It is a schematic diagram of the structure of the welding assembly in the present invention.

[0031] Figure 10 It is a schematic diagram of the structure of the pushing cylinder in the present invention.

[0032] In the figure: 1. Welding table; 101. Arc-shaped positioning groove; 102. Horizontal adjustment wheel; 103. Vertical adjustment wheel; 104. First motor; 105. Second motor; 2. Side plate; 201. Avoidance opening; 3. Angle-adjusting clamping mechanism; 310. Bearing plate; 311. Slide rail; 312. Slide block; 313. Locking bolt; 314. Guide roller; 320. Clamping arc plate; 321. Positioning hole; 322. Rubber cushion block; 330. Movable plate; 331. Support rod; 332. Longitudinal tooth groove; 333. Guide rod; 340. Mounting seat; 341. Driving motor; 342. Lifting gear; 350. Positioning plug; 4. Lifting cylinder; 401. Cylinder seat; 402. Fixed plate; 403. Sliding frame; 404. Sliding block; 405. Return spring; 406. Follow-up shaft; 407. Rotating frame; 5. Ring-shaped welding mechanism; 510. Welding bracket; 511. Positioning plate; 512. Ring-shaped tooth groove; 513. Ring-shaped track; 514. Docking lock block; 520. Welding assembly; 521. Mounting plate; 522. Crawling motor; 523. Crawling gear; 524. Support sliding frame; 525. Auxiliary roller; 526. Deflection motor; 527. Support; 528. Welding torch; 6. Top plate; 7. Pushing cylinder; 701. Pressing disc; 702. Spherical groove; 703. Electric telescopic rod; 704. Mounting block; 705. Ball. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figure 1 , Figure 2 and Figure 4 As shown in

[0035] Specifically, when preparing for welding, place the spherical joint into the arc-shaped positioning groove 101, and at the same time place the rod member on the bearing plate 310. Push the end of the rod member gradually closer to the spherical joint until it abuts against the surface of the spherical joint. During this process, the spherical joint can adjust the welding position by rotating horizontally and vertically, and at the same time the rod member can adjust the height and angle during welding through the movable plate 330, so as to meet the welding requirements of different grid structures. After adjustment, use the clamping arc plate 320 to clamp and fix the rod member, and at the same time the spherical joint will also be pressed and positioned to ensure the stability and reliability of the welding process.

[0036] As Figure 1 , Figure 4 , Figure 6 and Figure 9 shown, a lifting cylinder 4 is fixedly arranged on the side plate 2. The output end of the lifting cylinder 4 is connected with an annular welding mechanism 5. The annular welding mechanism 5 includes a group of welding brackets 510 arranged in a semi-circular shape. The welding brackets 510 are enclosed to form a ring for the rod member to pass through concentrically. A welding assembly 520 is arranged on the welding brackets 510. The welding assembly 520 includes a mounting plate 521. A deflection motor 526 is fixedly arranged on the mounting plate 521. The output end of the deflection motor 526 is fixedly connected with a support 527. A welding torch 528 is fixedly arranged in the support 527. The deflection motor 526 drives the welding torch 528 to swing so that the welding torch 528 faces the joint position between the rod member and the spherical joint. The mounting plate 521 drives the welding torch 528 to crawl along the welding brackets 510 to realize continuous annular welding.

[0037] Specifically, by setting the annular welding mechanism 5, during welding, the welding brackets 510 are enclosed to form a ring, and the rod member passes through the welding brackets 510 concentrically. When the bearing plate 310 starts to swing to adjust the welding angle of the rod member, the welding brackets 510 will deflect synchronously with the swinging process of the bearing plate 310, so that the rod member always remains on the axis position of the welding brackets 510. At the same time, use the deflection motor 526 to drive the welding torch 528 to swing so that the welding torch 528 can accurately align with the joint position between the rod member and the spherical joint. Cooperating with the crawling process of the mounting plate 521 driving the welding torch 528 along the welding brackets 510, it is possible to perform a continuous annular automatic welding process around the rod member, which is beneficial to improving the welding quality and welding efficiency.

[0038] As Figure 4 and Figure 5 shown, a row of guide rollers 314 are rotatably installed on the surface of the bearing plate 310. A slide rail 311 is arranged at the bottom of the bearing plate 310. A slider 312 is slidably installed on the slide rail 311. A locking bolt 313 is arranged at the bottom of the slider 312. The bottom of the slider 312 is rotatably connected to one end of a support rod 331. The other end of the support rod 331 is rotatably connected to the movable plate 330.

[0039] Specifically, since one end of the bottom of the bearing plate 310 is rotatably fitted with the movable plate 330, the bearing plate 310 can rotate around the axis to adjust the deflection angle. During this process, the slider 312 will slide adaptively on the slide rail 311, and the slider 312 is locked and fixed by the locking bolt 313. The support rod 331 plays a supporting role for the bearing plate 310, so that the bearing plate 310 can remain stationary after the deflection adjustment.

[0040] As Figure 4 and Figure 5 shown, guide rods 333 are fixedly arranged at both ends of the bottom of the movable plate 330. The guide rods 333 slide through the mounting seat 340. The mounting seat 340 is fixedly installed on the side plate 2. A driving motor 341 is fixedly installed at the upper end of the mounting seat 340. The output end of the driving motor 341 is connected with a height-adjusting gear 342. A longitudinal tooth groove 332 is arranged on one side of the movable plate 330. The longitudinal tooth groove 332 penetrates through the mounting seat 340. The height-adjusting gear 342 meshes with the longitudinal tooth groove 332.

[0041] Specifically, when adjusting the height, the driving motor 341 is started to drive the height-adjusting gear 342 to rotate. The height-adjusting gear 342 will drive the movable plate 330 to move up and down through the longitudinal tooth groove 332, so as to be able to adjust the height of the bearing plate 310 and facilitate the adjustment of the welding position of the rod member. During this process, the guide rods 333 are used to limit and guide the movable plate 330 to ensure the reliable and stable vertical movement process of the movable plate 330.

[0042] As Figure 5 shown, raised portions are arranged at intervals at the top of the clamping arc plate 320, and the raised portions of the two clamping arc plates 320 on both sides are arranged staggeredly to close and clamp. A positioning hole 321 is arranged through the raised portion, and a positioning insertion rod 350 is inserted into the positioning hole 321. Rubber cushion blocks 322 are fixedly arranged on the inner wall of the clamping arc plate 320.

[0043] Specifically, after the two clamping arc plates 320 are closed, the raised portions are arranged staggeredly. At this time, when the positioning insertion rod 350 is inserted into the positioning hole 321, the two clamping arc plates 320 on both sides can be locked at the same time, so that the clamping arc plate 320 can clamp and fix the rod member. During the clamping process, the rubber cushion blocks 322 make the clamping arc plate 320 fully contact with the surface of the rod member and increase the friction force, effectively improving the clamping stability and preventing the rod member from sliding.

[0044] As Figure 5 and Figure 6 shown, a positioning plate 511 extends on one side of the welding bracket 510. The positioning plates 511 on both sides enclose to form a limiting hole. After the positioning insertion rod 350 passes through the positioning hole 321, it continues to pass through the limiting hole.

[0045] As Figure 6 andFigure 7 As shown, the lifting cylinder 4 is fixedly installed on the cylinder base 401, the cylinder base 401 is fixedly connected to the side plate 2, the output end of the lifting cylinder 4 is connected with a fixing plate 402, sliding frames 403 are arranged at both ends of the bottom of the fixing plate 402, sliding blocks 404 are installed to slide up and down in the sliding frames 403, a return spring 405 is arranged between the bottom of the sliding block 404 and the sliding frame 403, a follower shaft 406 is fixedly arranged between the two sliding blocks 404, a rotating frame 407 is rotatably installed on the follower shaft 406, and the tops of the two welding brackets 510 are rotatably matched with the rotating frame 407.

[0046] Specifically, by setting the positioning insertion rod 350, the positioning insertion rod 350 is inserted through the clamping arc plate 320 and the positioning plate 511 at the same time. When the bearing plate 310 is adjusted in angle, the bearing plate 310 will drive the welding bracket 510 to deflect synchronously through the positioning insertion rod 350, so that when the rod member is adjusted in angle, it can always be kept on the axis position of the welding bracket 510. During this process, since the welding bracket 510 swings around the follower shaft 406 through the rotating frame 407, the rotating frame 407 will slide up and down adaptively in the vertical direction to ensure that the welding bracket 510 can deflect smoothly. At this time, the follower shaft 406 will drive the sliding block 404 to slide in the sliding frame 403 to adapt to the deflection process of the welding bracket 510.

[0047] As Figure 8 shown, an annular tooth groove 512 is arranged on the inner wall of the welding bracket 510, an annular track 513 is arranged on the side wall of the welding bracket 510, a docking lock block 514 is arranged at the bottom of one of the welding brackets 510, a notch is correspondingly arranged at the bottom of the other welding bracket 510, and the docking lock block 514 is buckled in the notch to close and lock the welding bracket 510.

[0048] Specifically, before welding, the two welding brackets 510 are opened, and the welding brackets 510 are driven by the lifting cylinder 4 to move downward until the welding brackets 510 move to both sides of the rod member. At this time, the two welding brackets 510 are closed and locked through the docking lock block 514 and the notch to form a complete ring. At this time, the position of the welding brackets 510 is adjusted again through the lifting cylinder 4 so that the rod member can be exactly located on the axis position of the closed welding brackets 510. After the rod member is welded, the docking lock block 514 is opened, and at the same time the two welding brackets 510 are opened. At this time, the welding brackets 510 are driven by the lifting cylinder 4 to move upward, so that the rod member can rotate horizontally with the spherical joint and be separated and removed to prepare for the welding process of the next rod member.

[0049] As Figure 8 and Figure 9As shown in the figure, a crawling motor 522 is fixedly arranged on one side of the mounting plate 521. The output end of the crawling motor 522 is connected with a crawling gear 523. The crawling gear 523 meshes with the annular tooth groove 512. The end of the mounting plate 521 extends to be provided with a support carriage 524. An auxiliary roller 525 is rotatably installed in the support carriage 524. The support carriage 524 is slidably installed in the annular track 513, and the auxiliary roller 525 rolls and abuts against the side wall of the welding bracket 510.

[0050] Specifically, when the crawling motor 522 starts, it will drive the crawling gear 523 to rotate. By using the meshing effect of the crawling gear 523 and the annular tooth groove 512, the whole mounting plate 521 can crawl along the welding bracket 510. During this process, the support carriage 524 will slide in the annular track 513 to provide a supporting effect on the mounting plate 521. At the same time, the auxiliary roller 525 will roll along the outer wall of the welding bracket 510 during the crawling process of the mounting plate 521 to improve the stability during the crawling process. Since the rod member is always located on the axis position of the welding bracket 510, the welding torch 528 will also always be aligned with the joint position between the rod member and the spherical joint during the crawling process, so as to realize an accurate circular welding process around the rod member.

[0051] As Figure 1 and Figure 10 shown in the figure, a top plate 6 is fixedly arranged at the top end of the side plate 2. A pressing cylinder 7 is fixedly arranged on the top plate 6. The output end of the pressing cylinder 7 is connected with a pressing disc 701. The pressing disc 701 is located directly above the spherical joint. A spherical groove 702 is arranged at the bottom of the pressing disc 701. An installation groove is centrally penetrated through the spherical groove 702. An electric telescopic rod 703 is fixedly arranged in the installation groove. The end of the electric telescopic rod 703 is fixedly connected with an installation block 704. A ball 705 is rotatably installed in the installation block 704.

[0052] As Figure 2 and Figure 3 shown in the figure, a pair of transverse adjusting wheels 102 are rotatably installed on the left and right sides at the upper end of the arc-shaped positioning groove 101. The transverse adjusting wheels 102 are driven by a first motor 104 to rotate. A pair of longitudinal adjusting wheels 103 are rotatably installed on the front and rear sides at the bottom end of the arc-shaped positioning groove 101. The longitudinal adjusting wheels 103 are driven by a second motor 105 to rotate. The transverse adjusting wheels 102 and the longitudinal adjusting wheels 103 both abut against the surface of the spherical joint.

[0053] Specifically, when preparing for welding, the spherical joint is placed in the arc-shaped positioning groove 101. At the same time, the electric telescopic rod 703 pushes the mounting block 704 downward, causing the mounting block 704 to extend out of the mounting groove until the ball 705 abuts against the top of the spherical joint. At this time, the contact between the ball 705 and the spherical joint is "point contact". While the ball 705 positions and presses the spherical joint, it does not prevent the normal rotation of the spherical joint. The first motor 104 drives the transverse adjusting wheel 102 to rotate, enabling the spherical joint to rotate horizontally. The second motor 105 drives the longitudinal adjusting wheel 103 to rotate, enabling the spherical joint to rotate longitudinally, thereby adjusting the welding position of the spherical joint. After adjustment, the electric telescopic rod 703 pulls the mounting block 704 upward, causing the ball 705 to retract into the mounting groove. At the same time, the pushing cylinder 7 pushes the pressing plate 701 downward, causing the pressing plate 701 to abut against the top of the spherical joint. At this time, the contact between the pressing plate 701 and the spherical joint is "surface contact", effectively improving the pressing stability by increasing the contact area and keeping the spherical joint fixed during the welding process.

[0054] The working principle of the present invention is as follows Figures 1 - 10 As shown in the figure, when in use, first place the spherical joint into the arc-shaped positioning groove 101. At the same time, the electric telescopic rod 703 pushes the mounting block 704 downward, causing the mounting block 704 to extend out of the mounting groove until the ball 705 abuts against the top of the spherical joint. The first motor 104 drives the transverse adjusting wheel 102 to rotate, enabling the spherical joint to rotate horizontally. The second motor 105 drives the longitudinal adjusting wheel 103 to rotate, enabling the spherical joint to rotate longitudinally, thereby adjusting the welding position of the spherical joint. After adjustment, the electric telescopic rod 703 pulls the mounting block 704 upward, causing the ball 705 to retract into the mounting groove. At the same time, the pushing cylinder 7 pushes the pressing plate 701 downward, causing the pressing plate 701 to abut against the top of the spherical joint, keeping the spherical joint fixed during the welding process.

[0055] Subsequently, the rod member is placed on the bearing plate 310. The rod member is conveyed forward through the guide rollers 314 until it abuts against the spherical joint. The clamping arc plates 320 on both sides are closed to clamp and fix the rod member. At the same time, the lifting cylinder 4 drives the welding bracket 510 to move downward until the welding bracket 510 moves to both sides of the rod member. At this time, the two welding brackets 510 are closed and locked through the docking lock block 514 and the notch to form a complete ring. At this time, the position of the welding bracket 510 is adjusted again through the lifting cylinder 4 so that the rod member can be exactly located on the axis position of the closed welding bracket 510. Then, the positioning plug 350 is inserted into the positioning hole 321 so that the positioning plug 350 can penetrate through the clamping arc plate 320 and the positioning plate 511 at the same time. When the bearing plate 310 is adjusted in angle, the bearing plate 310 will drive the welding bracket 510 to deflect synchronously through the positioning plug 350, so that when the rod member is adjusted in angle, it can always be kept on the axis position of the welding bracket 510. During this process, the follower shaft 406 will drive the sliding block 404 to slide in the sliding frame 403 to adapt to the deflection process of the welding bracket 510.

[0056] The deflection motor 526 is used to drive the welding torch 528 to swing so that the welding torch 528 can accurately align with the joint position between the rod member and the spherical joint. The crawling motor 522 is started to drive the crawling gear 523 to rotate. By using the meshing effect of the crawling gear 523 and the annular tooth groove 512, the whole mounting plate 521 can crawl along the welding bracket 510. During this process, the support carriage 524 will slide in the annular track 513 to provide a supporting effect on the mounting plate 521. At the same time, the auxiliary roller 525 will roll along the outer wall of the welding bracket 510 during the crawling process of the mounting plate 521 to improve the stability during the crawling process. Since the rod member is always located on the axis position of the welding bracket 510, the welding torch 528 will also always align with the joint position between the rod member and the spherical joint during the crawling process, so that an accurate annular welding process can be realized around the rod member.

[0057] When the welding of one rod member is completed, the positioning plug 350 is pulled out. At the same time, the clamping arc plates on both sides and the welding bracket 510 are opened, and the welding bracket 510 is driven to move upward by the lifting cylinder 4 to create enough space for the removal of the rod member. At this time, the spherical joint is driven to rotate horizontally, and the spherical joint will drive the welded rod member to disengage from the bearing plate 310 to prepare for the welding process of the next rod member.

[0058] The above has described a specific embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A welding device for the lower chord spherical joint of a grid structure, comprising a welding table (1), characterized in that, An arc-shaped positioning groove (101) for placing spherical joints is provided through the upper end of the welding table (1). The spherical joint can rotate horizontally and longitudinally within the arc-shaped positioning groove (101) to adjust the welding point. A side plate (2) is fixedly arranged on one side of the welding table (1). An avoidance opening (201) is provided through the side plate (2). An angle-adjusting clamping mechanism (3) is arranged on the side plate (2). The angle-adjusting clamping mechanism (3) includes a bearing plate (310). Clamping arc plates (320) are rotatably installed on both sides of the bearing plate (310). The clamping arc plates (320) are used to clamp and fix the rod. One end of the bottom of the bearing plate (310) is rotatably matched with a movable plate (330). The movable plate (330) is used to adjust the height and angle of the rod during welding. A lifting cylinder (4) is fixedly arranged on the side plate (2). The output end of the lifting cylinder (4) is connected with an annular welding mechanism (5). The annular welding mechanism (5) includes a group of welding brackets (510) arranged in a semi-circular shape. The welding brackets (510) are enclosed to form a ring for the rod to pass through concentrically. A welding component (520) is arranged on the welding brackets (510). The welding component (520) includes a mounting plate (521). A deflection motor (526) is fixedly arranged on the mounting plate (521). The output end of the deflection motor (526) is fixedly connected with a support (527). A welding torch (528) is fixedly arranged in the support (527). The deflection motor (526) drives the welding torch (528) to swing so that the welding torch (528) faces the joint position between the rod and the spherical joint. The mounting plate (521) drives the welding torch (528) to crawl along the welding brackets (510) to achieve continuous annular welding.

2. The welding device for the lower chord spherical joint of a grid structure according to claim 1, characterized in that, A row of guide rollers (314) is rotatably installed on the surface of the bearing plate (310). A slide rail (311) is arranged at the bottom of the bearing plate (310). A slider (312) is slidably installed on the slide rail (311). A locking bolt (313) is arranged at the bottom of the slider (312). One end of the bottom of the slider (312) is rotatably connected with one end of a support rod (331). The other end of the support rod (331) is rotatably connected with the movable plate (330).

3. The welding device for the lower chord spherical joint of the grid structure according to claim 2, characterized in that, Guide rods (333) are fixedly arranged at both ends of the bottom of the movable plate (330). The guide rods (333) slidably penetrate through a mounting seat (340). The mounting seat (340) is fixedly installed on the side plate (2). A driving motor (341) is fixedly installed at the upper end of the mounting seat (340). The output end of the driving motor (341) is connected with a height-adjusting gear (342). A longitudinal tooth groove (332) is arranged on one side of the movable plate (330). The longitudinal tooth groove (332) penetrates through the mounting seat (340). The height-adjusting gear (342) is meshed with the longitudinal tooth groove (332).

4. A welding device for the lower chord spherical joint of a grid structure according to claim 1, characterized in that, The top of the clamping arc plate (320) is provided with raised parts at intervals, and the raised parts of the two clamping arc plates (320) are arranged staggeredly to close and clamp. A positioning hole (321) is penetrated through the raised part, a positioning plug (350) is penetrated through the positioning hole (321), and a rubber cushion block (322) is fixedly arranged on the inner wall of the clamping arc plate (320).

5. A welding device for the lower chord spherical joint of a grid structure according to claim 4, characterized in that, A positioning plate (511) extends on one side of the welding bracket (510), and the two positioning plates (511) enclose to form a limiting hole. After the positioning plug (350) passes through the positioning hole (321), it continues to pass through the limiting hole.

6. The welding device for the lower chord spherical joint of a grid structure according to claim 5, characterized in that, The lifting cylinder (4) is fixedly installed on the cylinder seat (401), the cylinder seat (401) is fixedly connected with the side plate (2), the output end of the lifting cylinder (4) is connected with a fixing plate (402), sliding brackets (403) are arranged at both ends of the bottom of the fixing plate (402), a sliding block (404) is slidably installed up and down in the sliding bracket (403), a return spring (405) is arranged between the bottom of the sliding block (404) and the sliding bracket (403), a follower shaft (406) is fixedly arranged between the two sliding blocks (404), a rotating bracket (407) is rotatably installed on the follower shaft (406), and the tops of the two welding brackets (510) are rotationally matched with the rotating bracket (407).

7. A welding device for the lower chord spherical joint of a grid structure according to claim 1, characterized in that, An annular tooth groove (512) is arranged on the inner wall of the welding bracket (510), an annular track (513) is arranged on the side wall of the welding bracket (510), a docking lock block (514) is arranged at the bottom of one of the welding brackets (510), a notch is correspondingly arranged at the bottom of the other welding bracket (510), and the docking lock block (514) is buckled in the notch to close and lock the welding bracket (510).

8. A welding device for the lower chord spherical joint of a grid structure according to claim 7, characterized in that, A crawling motor (522) is fixedly arranged on one side of the mounting plate (521), a crawling gear (523) is connected to the output end of the crawling motor (522), the crawling gear (523) is meshed with the annular tooth groove (512), a support sliding frame (524) extends at the end of the mounting plate (521), an auxiliary roller (525) is rotatably installed in the support sliding frame (524), the support sliding frame (524) is slidably installed in the annular track (513), and the auxiliary roller (525) rolls and abuts against the side wall of the welding bracket (510).

9. The welding device for the lower chord spherical joint of a grid structure according to claim 1, wherein, A top plate (6) is fixedly arranged at the top of the side plate (2), a pushing cylinder (7) is fixedly arranged on the top plate (6), the output end of the pushing cylinder (7) is connected with a pressing disc (701), the pressing disc (701) is located directly above the spherical node, a spherical groove (702) is arranged at the bottom of the pressing disc (701), an installation groove is penetrated through the center of the spherical groove (702), an electric telescopic rod (703) is fixedly arranged in the installation groove, an installation block (704) is fixedly connected to the end of the electric telescopic rod (703), and a ball (705) is rotatably installed in the installation block (704).

10. A welding device for the lower chord spherical joint of a grid structure according to claim 9, characterized in that, A pair of lateral adjusting wheels (102) are rotatably installed on the left and right sides of the upper end of the arc-shaped positioning groove (101), and the lateral adjusting wheels (102) are driven to rotate by a first motor (104). A pair of longitudinal adjusting wheels (103) are rotatably installed on the front and rear sides of the bottom end of the arc-shaped positioning groove (101), and the longitudinal adjusting wheels (103) are driven to rotate by a second motor (105). The lateral adjusting wheels (102) and the longitudinal adjusting wheels (103) both abut against the surface of the spherical joint.

Images