A net rack structure lower chord ball node welding device

Abstract

The present application relates to the field of net rack welding, especially to a kind of net rack structure bottom chord ball node welding device, including welding table, arc-shaped positioning slot for placing ball node is arranged in the upper end of welding table, ball node can be transversely and longitudinally rotated in arc-shaped positioning slot to adjust welding point position, one side of welding table is fixedly provided with side plate, avoiding mouth is arranged in the upper side plate, angle adjusting clamping mechanism is arranged on the side plate, angle adjusting clamping mechanism includes bearing plate, clamping arc plate is rotatably installed on the both sides of bearing plate, clamping arc plate is used to clamp and fix bar, and one end of bearing plate bottom is rotatably connected with movable plate.The present application utilizes the swing of welding torch driven by deflection motor to make welding torch can accurately aim at the joint position of bar and ball node, cooperates with mounting plate to drive welding torch to crawl along the welding support, can continuously carry out annular automatic welding process around bar, is favorable for improving welding quality and welding efficiency.

Description

TECHNICAL FIELD

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

[0002] The grid structure is a space structure formed by a plurality of rod members connected through nodes in a certain grid form, has the advantages of small space stress, light weight, large rigidity and good seismic performance, and can be used as a roof of a building such as a gymnasium, a theater, an exhibition hall, a waiting room, a stadium stand canopy, an airplane hangar, a two-way large-column-span workshop and the like.

[0003] The grid structure usually needs to weld a plurality of metal rod members around a spherical node to form a fixed support connection structure. At present, the welding process between the spherical node and the rod member usually adopts a manual welding mode. Since the rod member and the spherical node are in annular contact, the welder needs to go around the rod member and align the weld to perform welding, which requires relatively high welding proficiency of the welder. Meanwhile, the annular welding by the human is prone to discontinuity, which seriously affects the welding efficiency and the welding quality. SUMMARY

[0004] The present application relates to the technical field of grid welding, and particularly relates to a grid structure lower chord spherical node welding device.

[0005] The technical problems can be solved by the following technical scheme.

[0006] A grid structure lower chord spherical node welding device, comprising a welding table, an arc-shaped positioning groove for placing a spherical node is arranged 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 point position, a side plate is fixedly arranged on one side of the welding table, an avoiding opening is arranged through the side plate, an angle adjusting clamping mechanism is arranged on the side plate, the angle adjusting clamping mechanism comprises a bearing plate, clamping arc plates are rotatably arranged on the two sides of the bearing plate, the clamping arc plates are used for clamping and fixing the rod member, and the bottom of the bearing plate is rotatably connected with a movable plate at one end, the movable plate is used for adjusting the height and angle of the rod member during welding.

[0007] A lifting cylinder is fixedly arranged on the side plate, a ring-shaped welding mechanism is connected to the output end of the lifting cylinder, the ring-shaped welding mechanism comprises a group of semi-circular welding supports, the welding supports are combined into a ring shape to allow the rod member to pass concentrically, a welding assembly is arranged on the welding support, the welding assembly comprises a mounting plate, a deflection motor is fixedly arranged on the mounting plate, a support is fixedly connected to the output end of the deflection motor, a welding gun is fixedly arranged in the support, the deflection motor drives the welding gun to swing so that the welding gun is directed to the joint position of the rod member and the spherical node, and the mounting plate drives the welding gun to crawl along the welding support to realize continuous annular welding.

[0008] As a further scheme of the present application: the surface of the bearing plate is rotatably installed with a row of guide rollers, the bottom of the bearing plate is provided with a sliding rail, the sliding rail is slidably installed with a sliding block, the bottom of the sliding block is provided with a locking bolt, the bottom of the sliding block is rotatably connected with one end of a supporting rod, the other end of the supporting rod is rotatably connected with a movable plate.

[0009] As a further scheme of the present application: the bottom of the movable plate is fixedly provided with guide rods at both ends, the guide rods are slidably penetrated through a mounting seat, the mounting seat is fixedly installed on the side plate, the upper end of the mounting seat is fixedly installed with a driving motor, the output end of the driving motor is connected with a height adjusting gear, one side of the movable plate is provided with a longitudinal tooth groove, the longitudinal tooth groove is penetrated through the mounting seat, and the height adjusting gear is engaged with the longitudinal tooth groove.

[0010] As a further scheme of the present application: the top end of the clamping arc plate is provided with a protruding part at intervals, and the protruding parts of the clamping arc plates on both sides are staggered to be closed and clamped, a positioning hole is penetrated through the protruding part, a positioning plug rod is penetrated through the positioning hole, and a rubber pad is fixedly arranged on the inner wall of the clamping arc plate.

[0011] As a further scheme of the present application: one side of the welding support is provided with a positioning plate, the positioning plates on both sides enclose to form a limiting hole, and the positioning plug rod continues to penetrate through the limiting hole after penetrating out of the positioning hole.

[0012] As a further scheme of the present application: the lifting cylinder is fixedly installed on a cylinder seat, the cylinder seat is fixedly connected with the side plate, the output end of the lifting cylinder is connected with a fixed plate, the bottom of the fixed plate is provided with sliding frames at both ends, the sliding frames are slidably installed with sliding blocks in an up-down mode, a reset spring is arranged between the bottom of the sliding block and the sliding frame, a follow-up shaft is fixedly arranged between the two sliding blocks, a rotating frame is rotatably installed on the follow-up shaft, and the top ends of the two welding supports are rotatably connected with the rotating frame.

[0013] As a further scheme of the present application: an annular tooth groove is arranged on the inner wall of the welding support, an annular track is arranged on the side wall of the welding support, the bottom of one of the welding supports is provided with a butt joint locking block, the bottom of the other welding support is correspondingly provided with a notch, and the butt joint locking block is buckled in the notch to close and lock the welding support.

[0014] As a further scheme of the present application: a crawling motor is fixedly arranged on one side of the mounting plate, the output end of the crawling motor is connected with a crawling gear, the crawling gear is engaged with the annular tooth groove, a supporting sliding frame is arranged at the end of the mounting plate, an auxiliary roller is rotatably installed in the supporting sliding frame, the supporting sliding frame is slidably installed in the annular track, and the auxiliary roller is rolled and abuts against the side wall of the welding support.

[0015] As a further scheme of the present application: the top end of the side plate is fixedly provided with a top plate, a push cylinder is fixedly arranged on the top plate, a pressing disc is connected to the output end of the push cylinder, the pressing disc is located directly above the spherical joint, a spherical groove is arranged at the bottom of the pressing disc, a mounting groove is arranged through the center of the spherical groove, an electric telescopic rod is fixedly arranged in the mounting groove, a mounting block is fixedly connected to the end of the electric telescopic rod, and a ball is rollingly mounted in the mounting block.

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

[0017] The present application has the following beneficial effects:

[0018] (1) When preparing for welding, the spherical joint is placed into the arc-shaped positioning groove, the spherical joint can be adjusted by transverse and longitudinal rotation, the height and angle during welding can be adjusted by the movable plate, and thus the welding requirements of different grid structures can be met.

[0019] (2) By arranging the annular welding mechanism, when welding, the welding support is deflected synchronously with the swinging process of the bearing plate, so that the rod always remains in the axial position of the welding support, the welding gun is swung by the deflection motor, so that the welding gun can accurately aim at the joint position of the rod and the spherical joint, the welding gun is driven by the mounting plate to crawl along the welding support, and thus continuous annular automatic welding process can be carried out around the rod, which is beneficial to improve the welding quality and welding efficiency.

[0020] (3) When preparing for welding, the spherical joint is placed into the arc-shaped positioning groove, the mounting block is pushed downward by the electric telescopic rod, so that the mounting block extends out of the mounting groove, until the ball abuts against the top end of the spherical joint, at this time, the ball and the spherical joint are in point contact, the ball positions and presses the spherical joint, and meanwhile does not hinder the normal rotation adjustment process of the spherical joint, after adjustment, the mounting block is pulled upward by the electric telescopic rod, so that the ball retreats into the mounting groove, the pressing disc is pushed downward by the push cylinder, so that the pressing disc abuts against the top end of the spherical joint, at this time, the pressing disc and the spherical joint are in surface contact, so that the spherical joint remains fixed during welding, and the welding stability is improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0022] Figure 1is the overall structural schematic diagram of the present application.

[0023] Figure 2 is the structural schematic diagram of the welding table in the present application.

[0024] Figure 3 is the bottom structural schematic diagram of the welding table in the present application.

[0025] Figure 4 is the structural schematic diagram of the angle adjusting and clamping mechanism in the present application.

[0026] Figure 5 is another structural schematic diagram of the angle adjusting and clamping mechanism in the present application.

[0027] Figure 6 is the structural schematic diagram of the ring-shaped welding mechanism in the present application.

[0028] Figure 7 is Figure 6 is the enlarged schematic diagram of A in the present application.

[0029] Figure 8 is the structural schematic diagram of the welding support in the present application.

[0030] Figure 9 is the structural schematic diagram of the welding assembly in the present application.

[0031] Figure 10 is the structural schematic diagram of the pushing cylinder in the present application.

[0032] In the figure: 1, welding table; 101, arc positioning groove; 102, transverse adjusting wheel; 103, longitudinal adjusting wheel; 104, first motor; 105, second motor; 2, side plate; 201, avoiding opening; 3, angle adjusting clamping mechanism; 310, bearing plate; 311, sliding rail; 312, sliding block; 313, locking bolt; 314, guide roller; 320, clamping arc plate; 321, positioning hole; 322, rubber pad; 330, movable plate; 331, support rod; 332, longitudinal tooth groove; 333, guide rod; 340, mounting seat; 341, driving motor; 342, height adjusting 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 welding mechanism; 510, welding support; 511, positioning plate; 512, ring tooth groove; 513, ring track; 514, butt joint 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 gun; 6, top plate; 7, push cylinder; 701, pressing disc; 702, spherical groove; 703, electric telescopic rod; 704, mounting block; 705, ball. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Please refer to Figure 1 , Figure 2 and Figure 4 , the present application is a kind of net rack structure lower chord ball node welding device, including welding table 1, the arc-shaped positioning groove 101 for placing ball node is arranged on the upper end of welding table 1, ball node can be transversely and longitudinally rotated in the arc-shaped positioning groove 101 to adjust the welding point position, one side of welding table 1 is fixedly provided with side plate 2, the avoiding opening 201 is arranged through the side plate 2, the angle adjusting clamping mechanism 3 is arranged on the side plate 2, the angle adjusting clamping mechanism 3 includes bearing plate 310, the clamping arc plate 320 is rotatably installed on both sides of bearing plate 310, the clamping arc plate 320 is used to clamp and fix the bar, the movable plate 330 is rotatably connected with one end of the bottom of bearing plate 310, and the movable plate 330 is used to adjust the height and angle of the bar during welding.

[0035] Specifically, when preparing for welding, the ball node is placed into the arc-shaped positioning groove 101, and the rod is placed on the bearing plate 310. The end of the rod is gradually pushed close to the ball node until it abuts against the surface of the ball node. During this process, the ball node can be adjusted by horizontal and vertical rotation to adjust the welding point position, and the rod can be adjusted in height and angle by the movable plate 330 during welding, so as to meet the welding requirements of different grid structures. When adjusted, the rod is clamped and fixed by the clamping arc plate 320, and the ball node is also pressed and positioned to ensure the stability and reliability of the welding process.

[0036] As shown in Figure 1 , Figure 4 , Figure 6 and Figure 9 , the side plate 2 is fixedly provided with a lifting cylinder 4, and the output end of the lifting cylinder 4 is connected with a ring-shaped welding mechanism 5. The ring-shaped welding mechanism 5 includes a set of semi-circular welding supports 510, which are combined to form a ring shape for the rod to pass through concentrically. The welding support 510 is provided with a welding assembly 520, which includes a mounting plate 521. The mounting plate 521 is fixedly provided with a deflection motor 526, and the output end of the deflection motor 526 is fixedly connected with a support 527. The support 527 is fixedly provided with a welding gun 528. The deflection motor 526 drives the welding gun 528 to swing so that the welding gun 528 is directed towards the joint position of the rod and the ball node. The mounting plate 521 drives the welding gun 528 to crawl along the welding support 510 to realize continuous ring-shaped welding.

[0037] Specifically, by setting the ring-shaped welding mechanism 5, when welding, the welding supports 510 are combined to form a ring shape, and the rod passes through the welding supports 510 concentrically. When the bearing plate 310 starts to swing to adjust the welding angle of the rod, the welding supports 510 will be deflected synchronously with the swinging process of the bearing plate 310, so that the rod always remains in the axial position of the welding support 510. At the same time, the deflection motor 526 drives the welding gun 528 to swing so that the welding gun 528 can accurately aim at the joint position of the rod and the ball node. In combination with the crawling process of the mounting plate 521 driving the welding gun 528 along the welding support 510, continuous ring-shaped automatic welding process can be carried out around the rod, which is beneficial to improve the welding quality and welding efficiency.

[0038] As shown in Figure 4 and Figure 5 , a row of guide rollers 314 are rotatably installed on the surface of the bearing plate 310. The bearing plate 310 is provided with a sliding rail 311 at the bottom. A sliding block 312 is slidably installed on the sliding rail 311. The bottom of the sliding block 312 is provided with a locking bolt 313. The bottom of the sliding block 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.

[0039] Specifically, since the bottom end of the bearing plate 310 is rotationally connected with the movable plate 330, the bearing plate 310 can rotate around the shaft to adjust the deflection angle, in this process, the sliding block 312 will slide on the sliding rail 311, and the sliding block 312 is locked and fixed by the locking bolt 313, and the support rod 331 supports the bearing plate 310, so that the bearing plate 310 can remain stationary after deflection adjustment.

[0040] As shown in Figure 4 and Figure 5 , the bottom of the movable plate 330 is fixedly provided with a guide rod 333, the guide rod 333 slides through the mounting seat 340, the mounting seat 340 is fixedly installed on the side plate 2, the mounting seat 340 is fixedly installed with a driving motor 341 at the upper end, the driving motor 341 is connected with a height adjusting gear 342 at the output end, the movable plate 330 is provided with a longitudinal tooth groove 332 on one side, the longitudinal tooth groove 332 penetrates the mounting seat 340, and the height adjusting gear 342 is engaged 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, and the height adjusting gear 342 drives the movable plate 330 to move up and down through the longitudinal tooth groove 332, so that the bearing plate 310 can be adjusted in height, and the welding position of the rod member is adjusted conveniently, in this process, the guide rod 333 is used to limit and guide the movable plate 330, so that the vertical movement of the movable plate 330 is reliable and stable.

[0042] As shown in Figure 5 , the top end of the clamping arc plate 320 is provided with a protruding part at intervals, and the protruding parts of the clamping arc plates 320 on both sides are staggered to close and clamp, a positioning hole 321 is provided through the protruding part, a positioning plug rod 350 is inserted into the positioning hole 321, and a rubber pad 322 is fixedly arranged on the inner wall of the clamping arc plate 320.

[0043] Specifically, after the two clamping arc plates 320 are closed, the protruding parts are staggered, at this time, the positioning plug rod 350 is inserted into the positioning hole 321, so that the two clamping arc plates 320 are locked at the same time, the clamping arc plates 320 can clamp and fix the rod member, and in the clamping process, the rubber pad 322 makes the clamping arc plate 320 fully contact with the surface of the rod member and increases the friction, so that the clamping stability is effectively improved, and the rod member is prevented from sliding.

[0044] As shown in Figure 5 and Figure 6 , the welding support 510 is provided with a positioning plate 511 on one side, the positioning plates 511 on both sides form a limiting hole, and the positioning plug rod 350 passes through the limiting hole after passing through the positioning hole 321.

[0045] As shown in Figure 6 andFigure 7 As shown, 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 the fixed plate 402, the bottom of the fixed plate 402 is provided with the sliding frame 403, the sliding block 404 is slidingly installed in the sliding frame 403, the reset spring 405 is arranged between the bottom of the sliding block 404 and the sliding frame 403, the follow-up shaft 406 is fixedly arranged between the two sliding blocks 404, the rotating frame 407 is rotatably installed on the follow-up shaft 406, and the top ends of the two welding supports 510 are in rotating fit with the rotating frame 407.

[0046] Specifically, the positioning plug rod 350 is arranged, the positioning plug rod 350 is inserted in 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 support 510 to be deflected synchronously through the positioning plug rod 350, so that the rod piece can always be kept on the axis position of the welding support 510 when the angle is adjusted, in the process, since the welding support 510 swings around the follow-up shaft 406 through the rotating frame 407, the rotating frame 407 will be correspondingly slid up and down in the vertical direction, so that the welding support 510 can be smoothly deflected, at the moment, the follow-up shaft 406 will drive the sliding block 404 to slide in the sliding frame 403, so as to adapt to the deflection process of the welding support 510.

[0047] As shown in the figure, Figure 8 The inner wall of the welding support 510 is provided with the annular tooth groove 512, the side wall of the welding support 510 is provided with the annular track 513, the bottom of one of the welding supports 510 is provided with the butt joint lock block 514, and the bottom of the other welding support 510 is correspondingly provided with the slot, and the butt joint lock block 514 is buckled in the slot to close and lock the welding support 510.

[0048] Specifically, before welding, the two welding supports 510 are opened, and the welding support 510 is driven downward by the lifting cylinder 4 until the welding support 510 moves to the two sides of the rod piece, at the moment, the two welding supports 510 are closed and locked to form a complete ring through the butt joint lock block 514 and the slot, at the moment, the position of the welding support 510 is adjusted again through the lifting cylinder 4, so that the rod piece can be located on the axis position of the closed welding support 510. When the rod piece is welded, the butt joint lock block 514 is opened, and the two welding supports 510 are opened at the moment, the welding support 510 is driven upward by the lifting cylinder 4, so that the rod piece can be separated and moved out with the horizontal rotation of the ball node, in order to prepare for the welding process of the next rod piece.

[0049] As shown in the figure, Figure 8 and Figure 9As shown, the mounting plate 521 is fixedly provided with a crawling motor 522 on one side, the output end of the crawling motor 522 is connected with a crawling gear 523, the crawling gear 523 is engaged with the annular gear slot 512, the mounting plate 521 is provided with a supporting slide 524 at the end, the supporting slide 524 is rotatably installed with an auxiliary roller 525, the supporting slide 524 is slidingly installed in the annular track 513, and the auxiliary roller 525 is rollingly attached to the side wall of the welding support 510.

[0050] Specifically, the crawling motor 522 is started to drive the crawling gear 523 to rotate, and the meshing of the crawling gear 523 and the annular gear slot 512 enables the mounting plate 521 to crawl along the welding support 510. During the process, the supporting slide 524 slides in the annular track 513 to provide support for the mounting plate 521, and the auxiliary roller 525 rolls along the outer wall of the welding support 510 during the crawling process of the mounting plate 521 to improve the stability during the crawling process. Since the rod is always located on the axis of the welding support 510, the welding gun 528 will always be aligned with the joint between the rod and the ball node during the crawling process, so that precise annular welding can be realized around the rod.

[0051] As shown in Figure 1 and Figure 10 , the top plate 6 is fixedly provided at the top end of the side plate 2, the push cylinder 7 is fixedly provided on the top plate 6, the output end of the push cylinder 7 is connected with a pressing disc 701, the pressing disc 701 is located directly above the ball node, the bottom of the pressing disc 701 is provided with a spherical groove 702, the spherical groove 702 is provided with a mounting groove in the center, the mounting groove is fixedly provided with an electric telescopic rod 703, the end of the electric telescopic rod 703 is fixedly connected with a mounting block 704, and the mounting block 704 is rollingly installed with a ball 705.

[0052] As shown in Figure 2 and Figure 3 , a pair of transverse adjusting wheels 102 are rotatably installed on the left and right sides of the upper end of the arc-shaped positioning groove 101, the transverse adjusting wheels 102 are driven to rotate by the 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, the longitudinal adjusting wheels 103 are driven to rotate by the second motor 105, and the transverse adjusting wheels 102 and the longitudinal adjusting wheels 103 are abutted on the surface of the ball node.

[0053] Specifically, when preparing for welding, the ball node is placed in the arc-shaped positioning groove 101, and the electric telescopic rod 703 pushes the mounting block 704 downward, so that the mounting block 704 extends out of the mounting groove until the ball 705 abuts against the top end of the ball node, at this time, the ball 705 and the ball node are in "point contact", the ball 705 positions and compresses the ball node, and at the same time, does not hinder the normal rotation process of the ball node, the first motor 104 drives the horizontal adjusting wheel 102 to rotate, so that the ball node can rotate horizontally, the second motor 105 drives the vertical adjusting wheel 103 to rotate, so that the ball node can rotate vertically, so that the welding point position of the ball node can be adjusted, after adjustment, the electric telescopic rod 703 pulls the mounting block 704 upward, so that the ball 705 retreats into the mounting groove, and the push cylinder 7 pushes the compression disc 701 downward, so that the compression disc 701 abuts against the top end of the ball node, at this time, the compression disc 701 and the ball node are in "surface contact", the compression stability is effectively improved by increasing the contact area, so that the ball node remains stationary during welding.

[0054] The working principle of the application is as follows: Figures 1-10 As shown in the figure, in use, first, the ball node is placed in the arc-shaped positioning groove 101, and the electric telescopic rod 703 pushes the mounting block 704 downward, so that the mounting block 704 extends out of the mounting groove until the ball 705 abuts against the top end of the ball node, the first motor 104 drives the horizontal adjusting wheel 102 to rotate, so that the ball node can rotate horizontally, the second motor 105 drives the vertical adjusting wheel 103 to rotate, so that the ball node can rotate vertically, so that the welding point position of the ball node can be adjusted, after adjustment, the electric telescopic rod 703 pulls the mounting block 704 upward, so that the ball 705 retreats into the mounting groove, and the push cylinder 7 pushes the compression disc 701 downward, so that the compression disc 701 abuts against the top end of the ball node, so that the ball node remains stationary during welding.

[0055] Subsequently, the rod is placed on the bearing plate 310, and the rod is conveyed forward by the guide roller 314 until it abuts against the ball node, the clamping arc plates 320 on both sides are closed to clamp and fix the rod, and the welding support 510 is moved downward by the lifting cylinder 4 until the welding support 510 moves to both sides of the rod, at which time the two welding supports 510 are closed and locked to form a complete ring through butt joint of the locking blocks 514 and the notches, the position of the welding support 510 is adjusted again by the lifting cylinder 4 so that the rod is located on the axis of the closed welding support 510, and then the positioning rod 350 is inserted into the positioning hole 321 so that the positioning rod 350 can penetrate 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 support 510 to deflect synchronously through the positioning rod 350, so that the rod can always be located on the axis of the welding support 510 during the angle adjustment, and in this process, the sliding block 404 is driven to slide in the sliding frame 403 by the follower shaft 406 to adapt to the deflection process of the welding support 510.

[0056] The welding gun 528 is swung by the deflection motor 526 so that the welding gun 528 can accurately align the joint position of the rod and the ball node, the crawling motor 522 is started to drive the crawling gear 523 to rotate, the installation plate 521 as a whole can crawl along the welding support 510 by the meshing action of the crawling gear 523 and the annular gear slot 512, in this process, the support sliding frame 524 will slide in the annular track 513 to provide support to the installation plate 521, and the auxiliary roller 525 will roll along the outer wall of the welding support 510 during the crawling process of the installation plate 521 to improve the stability during the crawling process. Since the rod is always located on the axis of the welding support 510, the welding gun 528 will always align the joint position of the rod and the ball node during the crawling process, so that the accurate ring welding process around the rod can be realized.

[0057] When the welding of a rod is completed, the positioning rod 350 is pulled out, the clamping arc plates on both sides and the welding support 510 are opened, and the welding support 510 is moved upward by the lifting cylinder 4 to provide sufficient space for the removal of the rod, at which time the ball node is driven to rotate horizontally, and the welded rod is separated from the bearing plate 310 by the ball node to prepare for the welding process of the next rod.

[0058] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application and cannot be considered to limit the implementation range of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A welding device for the lower chord ball joint of a space truss structure, comprising a welding table (1), characterized in that, The arc-shaped positioning groove (101) is arranged through the upper end of the welding table (1) and is used for placing a ball node, the ball node can rotate horizontally and vertically in the arc-shaped positioning groove (101) to adjust a welding point position, a side plate (2) is fixedly arranged on one side of the welding table (1), an avoiding opening (201) is arranged through the side plate (2), an angle adjusting clamping mechanism (3) is arranged on the side plate (2), the angle adjusting clamping mechanism (3) comprises a bearing plate (310), clamping arc plates (320) are rotatably arranged on the two sides of the bearing plate (310), the clamping arc plates (320) are used for clamping and fixing a rod, one end of the bottom of the bearing plate (310) is rotatably connected with a movable plate (330), and the movable plate (330) is used for adjusting the height and angle of the rod during welding; The lifting cylinder (4) is fixedly arranged on the side plate (2), the annular welding mechanism (5) is connected with the output end of the lifting cylinder (4), the annular welding mechanism (5) comprises a group of welding supports (510) arranged in a semicircle, the welding supports (510) are combined into an annular shape to allow a rod to pass through concentrically, the welding supports (510) are provided with welding assemblies (520), the welding assembly (520) comprises a mounting plate (521), the 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), the welding gun (528) is fixedly arranged in the support (527), the deflection motor (526) drives the welding gun (528) to swing to make the welding gun (528) face the joint position of the rod and the ball node, and the mounting plate (521) drives the welding gun (528) to crawl along the welding support (510) to realize continuous annular welding; The protruding portions are arranged at intervals at the top ends of the clamping arc plates (320), the protruding portions of the clamping arc plates (320) on the two sides are arranged in a staggered mode to be folded and clamped, positioning holes (321) are arranged through the protruding portions, positioning rods (350) are arranged in the positioning holes (321), and rubber pads (322) are fixedly arranged on the inner walls of the clamping arc plates (320); The positioning plates (511) are arranged at intervals on the two sides of the welding support (510) and form a limiting hole, and the positioning rod (350) passes through the limiting hole after passing through the positioning hole (321). 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 the fixed plate (402), the bottom of the fixed plate (402) is provided with the sliding frame (403), the sliding block (404) is slidably installed in the sliding frame (403), the reset spring (405) is arranged between the bottom of the sliding block (404) and the sliding frame (403), the follow-up shaft (406) is fixedly arranged between the two sliding blocks (404), the rotating frame (407) is rotatably installed on the follow-up shaft (406), and the top ends of the two welding supports (510) are rotatably connected with the rotating frame (407).

2. The device according to claim 1, wherein The surface of the bearing plate (310) is rotatably installed with a row of guide rollers (314), the bottom of the bearing plate (310) is provided with a sliding rail (311), the sliding rail (311) is slidably installed with a sliding block (312), the bottom of the sliding block (312) is provided with a locking bolt (313), the bottom of the sliding block (312) is rotatably connected with one end of the supporting rod (331), and the other end of the supporting rod (331) is rotatably connected with the movable plate (330).

3. The device according to claim 2, wherein the device is characterized by: The movable plate (330) is fixedly provided with the guide rod (333) at both ends of the bottom, the guide rod (333) slidably penetrates the mounting seat (340), the mounting seat (340) is fixedly installed on the side plate (2), the mounting seat (340) is fixedly installed with the driving motor (341) at the upper end, the output end of the driving motor (341) is connected with the height adjusting gear (342), one side of the movable plate (330) is provided with the longitudinal tooth groove (332), the longitudinal tooth groove (332) penetrates the mounting seat (340), and the height adjusting gear (342) is meshed with the longitudinal tooth groove (332).

4. The device according to claim 1, wherein, The inner wall of the welding support (510) is provided with an annular tooth groove (512), the side wall of the welding support (510) is provided with an annular track (513), the bottom of one of the welding supports (510) is provided with a butt joint locking block (514), the bottom of the other welding support (510) is correspondingly provided with a notch, and the butt joint locking block (514) is buckled in the notch to close and lock the welding support (510).

5. The device according to claim 4, wherein the device is characterized by: One side of the mounting plate (521) is fixedly provided with the crawling motor (522), the output end of the crawling motor (522) is connected with the crawling gear (523), the crawling gear (523) is meshed with the annular tooth groove (512), the end of the mounting plate (521) is provided with the supporting sliding frame (524), the auxiliary roller (525) is rotatably installed in the supporting sliding frame (524), the supporting sliding frame (524) is slidably installed in the annular track (513), and the auxiliary roller (525) is rolled and abuts against the side wall of the welding support (510).

6. The device according to claim 1, wherein The side plate (2) top end fixedly provided with top plate (6), top plate (6) is fixedly provided with push cylinder (7), push cylinder (7) output end is connected with the pressing disc (701), the pressing disc (701) is located in the upper side of the ball node, the pressing disc (701) bottom is provided with spherical groove (702), the spherical groove (702) central through is provided with the installation slot, the installation slot is fixedly provided with electric telescopic rod (703) in, the electric telescopic rod (703) end is fixedly connected with the mounting block (704), the mounting block (704) is installed with the ball (705) in the rolling.

7. The device according to claim 6, wherein the device is characterized by: The left and right sides of the upper end of the arc-shaped positioning groove (101) are rotatably installed with a pair of transverse adjusting wheels (102), the transverse adjusting wheels (102) are driven to rotate by the first motor (104), the front and rear sides of the bottom end of the arc-shaped positioning groove (101) are rotatably installed with a pair of longitudinal adjusting wheels (103), the longitudinal adjusting wheels (103) are driven to rotate by the second motor (105), and the transverse adjusting wheels (102) and the longitudinal adjusting wheels (103) abut against the surface of the ball node.

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