Truss head welding equipment

Abstract

The present invention discloses a truss head welding device, which includes a support frame and two support platforms that are both connected to the support frame and are spaced apart in the left-right direction. On the outer side of the upper end of each support platform, a resistance welding unit is fixed. On the inner side of the upper end of each support platform, a conveyor belt assembly extending from the rear to the front is fixed. The two resistance welding units and the two conveyor belt assemblies are both arranged symmetrically left and right. The two conveyor belt assemblies are respectively used to support one end of the truss and drive the truss to move from the rear to the front. The two resistance welding units are respectively used to weld the truss head at one end of the truss. The present invention can realize the mechanized welding of the truss head and the truss, thereby improving the welding efficiency, reducing the labor intensity of workers, and improving the welding quality. In addition, it can effectively eliminate the defect of environmental pollution existing in traditional gas shielded welding.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and particularly relates to a truss head welding device. Background Art

[0002] A truss is generally a beam structure made by welding rods. At present, after the support beams in the trusses on the market are welded to the connecting ribs, truss heads need to be welded at both ends of the truss; currently, the truss heads and the trusses are welded manually by gas shielded welding, thus having the disadvantages of low welding efficiency, high working intensity of workers, and high technical requirements for workers. Moreover, when welding by gas shielded welding, a large amount of waste gas and dust will be generated, which will cause serious pollution to the environment and also have the disadvantage of light pollution. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a truss head welding device, which can realize the mechanized welding of the truss head and the truss, and can effectively reduce environmental pollution.

[0004] The truss head welding device of the present invention includes a support frame and two support platforms both connected to the support frame and spaced apart in the left-right direction. A resistance welding unit is fixed on the outer side of the upper end of each support platform, and a conveyor belt assembly extending from the rear to the front is fixed on the inner side of the upper end of each support platform. The two resistance welding units and the two conveyor belt assemblies are symmetrically arranged left and right. The two conveyor belt assemblies are respectively used to support one end of the truss and drive the truss to move from the rear to the front, and the two resistance welding units are respectively used to weld the truss head at one end of the truss.

[0005] After adopting the above structure, the present invention can realize the mechanized welding of the truss head and the truss, thereby improving the welding efficiency, reducing the labor intensity of workers, and improving the welding quality. In addition, the present invention realizes the welding of the truss head and the support beam in the truss by resistance welding, thereby effectively eliminating the defect of environmental pollution existing in traditional gas shielded welding.

[0006] In the truss head welding device of the present invention, each resistance welding unit includes a truss head horizontal rib welding structure and a truss head vertical rib welding structure sequentially fixed on the support platform from the rear to the front. Each truss head horizontal rib welding structure is used to weld the head horizontal rib to one end of the truss, and each truss head vertical rib welding structure is used to weld the head vertical rib to one end of the truss.

[0007] The truss head welding equipment of the present invention, wherein each truss head cross-bar welding structure includes a first resistance welding machine assembly. At the bottom inside each first resistance welding machine assembly, a first driving member is fixed. At the upper end of each first driving member, a support seat for supporting the head cross-bar is fixed. Each support seat is electrically connected to one of the electrodes in the corresponding first resistance welding machine assembly on the corresponding side. At the upper end of each support seat, a groove for partially embedding the head cross-bar is provided. At the upper part inside each first resistance welding machine assembly, two second driving members distributed in the front-back direction are connected. At the lower end of each second driving member, a first welding head is fixed. Each first welding head is electrically connected to the other electrode in the corresponding first resistance welding machine assembly on the corresponding side. When the first driving member pushes the support seat upward to make the two ends of the head cross-bar respectively abut against one ends of the two support beams located below in the truss, and when the second driving member pushes the first welding head downward to make the first welding head respectively press one ends of the two support beams located below in the truss against the head cross-bar on the corresponding side, the first resistance welding machine assembly is used to weld the head cross-bar and the two support beams located below in the truss.

[0008] The truss head welding equipment of the present invention, wherein each truss head cross-bar welding structure further includes a first feeding hopper and a first conveyor belt. Each first conveyor belt is fixed inside the corresponding first resistance welding machine assembly on the corresponding side. Each first feeding hopper is located on one side of the feeding end of the corresponding first conveyor belt and is used to convey the head cross-bar to the corresponding first conveyor belt. On one side of the discharging end of each first conveyor belt, a first receiving trough is fixed. On the other side of the discharging end of each first conveyor belt, a first sensor assembly and a first pushing device are fixed. When the first sensor assembly detects that the head cross-bar located on the first conveyor belt moves to the discharging end of the first conveyor belt, the first pushing device is used to push the head cross-bar located at the discharging end of the first conveyor belt into the first receiving trough. On one side of each first receiving trough, a second pushing device is fixed. Each second pushing device is used to push the head cross-bar located in the corresponding first receiving trough into the groove on the support seat on the corresponding side.

[0009] The truss head welding equipment of the present invention, wherein each first pusher device includes a third driving member and a first push plate. Each third driving member is fixed on the other side of the discharge end of the first conveyor belt on the corresponding side. Each first push plate is fixed on the driving end of the third driving member on the corresponding side. Each third driving member is used to drive the first push plate on the corresponding side to move so that the first push plate pushes the transverse rib of the head at the discharge end of the first conveyor belt on the corresponding side into the first receiving groove; each second pusher device includes a fourth driving member and a first push rod. Each fourth driving member is fixed on one side of the first receiving groove. One end of each first push rod is fixed to the driving end of the fourth driving member on the corresponding side. Each fourth driving member is used to drive the first push rod on the corresponding side to move so that the first push rod pushes the transverse rib of the head in the first receiving groove on the corresponding side into the groove on the support seat; a baffle is connected to the side of each support seat away from the first push rod. When the first push rod pushes the transverse rib of the head in the first receiving groove into the groove, the baffle is used to abut against one end of the transverse rib of the head to limit the transverse rib of the head; a plurality of pairs of slots are arranged at intervals along the moving direction of the first push rod on the side of each support seat away from the first push rod. Both ends of each baffle are respectively inserted and matched with one pair of slots on the corresponding side.

[0010] The truss head welding equipment of the present invention, wherein each truss head vertical rib welding structure includes a second resistance welding machine assembly. Each second resistance welding machine assembly is connected to the support platform on the corresponding side. A vertical plate is vertically slidably connected to the inner side of each second resistance welding machine assembly. The upper part of the inner side of each vertical plate is connected with a fifth driving member. A second welding head is fixed on the driving end of each fifth driving member. Each fifth driving member is used to drive the second welding head on the corresponding side to move vertically. Each second welding head is electrically connected to one of the electrodes of the second resistance welding machine assembly on the corresponding side. The lower end of each vertical plate is connected with a clamping assembly for clamping the vertical rib of the head. Each clamping assembly is electrically connected to the other electrode of the second resistance welding machine assembly on the corresponding side; when the fifth driving member drives the second welding head to move downward so that the second welding head abuts against the top of one end of the support beam located above in the truss, the fifth driving member is used to apply a thrust to the vertical plate to drive the vertical plate to move upward so that the clamping assembly drives the upper end of the vertical rib of the head to abut against the bottom of one end of the support beam located above in the truss and realize welding.

[0011] The truss head welding equipment of the present invention, wherein a first bracket is connected to the inner side of each second resistance welding machine assembly, each vertical plate is vertically slidably connected to the corresponding first bracket on its side, a traction member is fixed to the upper end of each first bracket, and the traction end of each traction member is connected to the upper end of the corresponding vertical plate; when the second resistance welding machine assembly does not weld the head vertical rib and one end of the support beam located above in the truss, the traction member is used to traction the vertical plate to prevent the vertical plate from freely falling; a second bracket is fixed to the inner side of each second resistance welding machine assembly, each first bracket is vertically slidably connected to the corresponding second bracket on its side, a sixth driving member is fixed to the upper end of each second bracket, the driving end of each sixth driving member is fixed to the upper end of the corresponding first bracket, and each sixth driving member is used to drive the corresponding first bracket to move vertically to adjust the initial positions of the corresponding second welding head and the corresponding clamping assembly.

[0012] The truss head welding equipment of the present invention, wherein each clamping assembly includes a seventh driving member and two first clamping arms, the two first clamping arms in each clamping assembly are rotatably connected to the lower end of the corresponding vertical plate, both ends of each seventh driving member are respectively rotatably connected to the outer end of one of the corresponding first clamping arms, and each seventh driving member is used to drive the two corresponding first clamping arms to rotate relative to each other so that the inner ends of the two first clamping arms clamp or release the head vertical rib; each second resistance welding machine assembly is connected to the corresponding support platform so as to be movable left and right, a first driving assembly is connected to each support platform, each second resistance welding machine assembly is connected to the driving end of the corresponding first driving assembly, and each first driving assembly is used to drive the corresponding second resistance welding machine assembly to move left and right relative to the support platform so that the second welding head and the clamping assembly approach or move away from the end of the truss.

[0013] The truss head welding equipment of the present invention, wherein each truss head vertical rib welding structure further includes a third resistance welding machine assembly, a moving frame, a second driving assembly, an eighth driving member, and two second clamping arms. Each third resistance welding machine assembly is fixed on the support platform on the corresponding side. Each moving frame is vertically slidably connected to the support platform on the corresponding side. Each second driving assembly is connected to the support platform on the corresponding side. Each moving frame is connected to the driving end of the second driving assembly on the corresponding side. Each second driving assembly is used to drive the moving frame on the corresponding side to move vertically. The two second clamping arms in each truss head vertical rib welding structure are rotatably connected to the moving frame on the corresponding side. The two ends of each eighth driving member are respectively rotatably connected to the lower ends of the two second clamping arms on the corresponding side. Each eighth driving member is used to drive the two second clamping arms on the corresponding side to rotate relative to each other so that the upper ends of the two second clamping arms on the corresponding side approach or move away from each other. The two second clamping arms in each truss head vertical rib welding structure are respectively electrically connected to the two electrodes of the third resistance welding machine assembly on the corresponding side; when the eighth driving member drives the two second clamping arms to rotate relative to each other so that the upper ends of the two second clamping arms approach each other, the upper ends of the two second clamping arms are used to clamp the lower end of the head vertical rib and the head horizontal rib located on the truss end to realize the welding of the lower end of the head vertical rib and the head horizontal rib.

[0014] The truss head welding equipment of the present invention, wherein each truss head vertical rib welding structure further includes a second feeding hopper, a second conveyor belt and a manipulator assembly. Each second feeding hopper and manipulator assembly are fixed on the support platform on the corresponding side. Each second conveyor belt is fixed inside the second feeding hopper on the corresponding side. Each second feeding hopper is used to convey the head vertical ribs to the second conveyor belt on the corresponding side. On one side of the discharge end of each second conveyor belt, a second receiving trough is fixed. On the other side of the discharge end of each second conveyor belt, a second sensor assembly and a third pushing device are fixed. When the second sensor assembly detects that the head vertical rib located on the second conveyor belt moves to the discharge end of the second conveyor belt, the third pushing device is used to push the head vertical rib located at the discharge end of the second conveyor belt into the second receiving trough. On one side of each second receiving trough, a fourth pushing device is fixed. Each fourth pushing device is used to push the head vertical rib located in the second receiving trough on the corresponding side so that one end of the head vertical rib abuts against the inner wall on the other side of the second receiving trough on the corresponding side. Each manipulator assembly is used to grab the head vertical rib located in the second receiving trough on the corresponding side, rotate the head vertical rib to a vertical state and then move it between the clamping assembly and the truss on the corresponding side; Each third pushing device includes a ninth driving member and a second pushing plate. Each ninth driving member is fixed on the other side of the discharge end of the second conveyor belt on the corresponding side. Each second pushing plate is fixed on the driving end of the ninth driving member on the corresponding side. Each ninth driving member is used to drive the second pushing plate on the corresponding side to move so that the second pushing plate pushes the head vertical rib located at the discharge end of the second conveyor belt on the corresponding side into the second receiving trough on the corresponding side; Each fourth pushing device includes a tenth driving member and a second push rod. Each tenth driving member is fixed on one side of the second receiving trough on the corresponding side. One end of each second push rod is fixed to the driving end of the tenth driving member on the corresponding side. Each tenth driving member is used to drive the second push rod on the corresponding side to push the head vertical rib located in the second receiving trough on the corresponding side so that one end of the head vertical rib abuts against the inner wall on the other side of the second receiving trough on the corresponding side; At the lower edge of each second receiving trough, a notch is provided. Each notch is used to avoid the clamping jaw in the manipulator assembly on the corresponding side so as to facilitate the clamping jaw in the manipulator assembly to clamp the head vertical rib located in the second receiving trough on the corresponding side.

[0015] The truss head welding equipment of the present invention, wherein two support platforms are connected to the support frame so as to be movable left and right, the front and rear sides of the upper end of the support frame are fixed with support tracks extending from left to right, the front and rear sides of the lower end of each support platform are fixed with a plurality of roller assemblies spaced from left to right, and each roller assembly can be connected to the support track on the corresponding side in a rolling manner; the lower end of each support platform is connected with a driving mechanism, and each driving mechanism is used to drive the support platform at the corresponding position to move left and right relative to the support frame to adjust the spacing between the two resistance welding units and the two conveyor belt assemblies; each driving mechanism includes a reducer and a rotating shaft, each reducer is fixed to the lower end of the support platform at the corresponding position, each rotating shaft extends from front to rear and is transmission-connected with the output end of the reducer at the corresponding position, gears are fixed to the front and rear ends of each rotating shaft, racks extending from left to right are fixed to the front and rear sides of the bottom of the support frame, and each gear is meshed with the rack on the corresponding side; each rotating shaft is rotatably connected to the lower end of the support platform through a plurality of bearing seat assemblies spaced from front to rear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a first three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a second three-dimensional structural schematic diagram of the present invention;

[0019] Figure 3 for Figure 2 The schematic diagram of the structure after the enlargement of A in the middle;

[0020] Figure 4 This is the first three-dimensional structural schematic diagram of the present invention after removing part of the structure;

[0021] Figure 5 This is a second three-dimensional structural schematic diagram of the present invention after removing part of the structure;

[0022] Figure 6 for Figure 5 The schematic diagram of the structure after the enlargement of B in the middle;

[0023] Figure 7 This is a third three-dimensional structural schematic diagram of the present invention after removing part of the structure;

[0024] Figure 8 for Figure 7 The schematic diagram of the structure after enlargement at C in the middle;

[0025] Figure 9 is Figure 7 The enlarged structural schematic diagram at position D in

[0026] Figure 10 This is the fourth three-dimensional structural schematic diagram of the present invention after removing some structures;

[0027] Figure 11 is Figure 10 The enlarged structural schematic diagram at position E in Detailed implementation manners

[0028] The following will disclose multiple implementation manners of the present invention with diagrams. For the sake of clear illustration, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some implementation manners of the present invention, these practical details are unnecessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0029] In addition, in the present invention, descriptions such as "first", "second", etc. are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0030] As Figure 1-11 shown, the truss head welding device of the present invention includes a support frame 1 and two support platforms 2 both connected to the support frame 1 and spaced apart in the left-right direction. A resistive welding unit is fixed to the outer side of the upper end of each support platform 2, and a conveyor belt assembly 3 extending from the rear to the front is fixed to the inner side of the upper end of each support platform 2. The two resistive welding units and the two conveyor belt assemblies 3 are both arranged symmetrically left and right. The two conveyor belt assemblies 3 are respectively used to support one end of the truss 4 and drive the truss 4 to move from the rear to the front, and the two resistive welding units are respectively used to weld the truss head at one end of the truss 4.

[0031] Each resistance welding unit includes a truss head horizontal rib welding structure 5 and a truss head vertical rib welding structure 7 that are sequentially fixed on the support platform 2 from back to front. Each truss head horizontal rib welding structure 5 is used to weld the head horizontal rib 41 to one end of the truss 4, and each truss head vertical rib welding structure 7 is used to weld the head vertical rib 42 to one end of the truss 4. After adopting this structure, when the conveyor belt assembly moves the truss from back to front to the position where the truss head horizontal rib welding structure is located, the truss head horizontal rib welding structure can automatically weld the head horizontal rib to the end of the truss. When the conveyor belt assembly drives the truss to move forward again to the position where the truss head vertical rib welding structure is located, the truss head vertical rib welding structure can automatically weld the head vertical rib to the end of the truss, that is, the automatic welding of the truss head is realized, and the welding efficiency of the truss head is improved.

[0032] Each truss head horizontal rib welding structure 5 includes a first resistance welding machine assembly 51. At the bottom inside each first resistance welding machine assembly 51, a first driving member 52 is fixed. At the upper end of each first driving member 52, a support seat 53 for supporting the head horizontal rib 41 is fixed. Each support seat 53 is electrically connected to one of the electrodes in the corresponding first resistance welding machine assembly 51 on the corresponding side. At the upper end of each support seat 53, a groove 531 for partially embedding the head horizontal rib 41 is provided. At the upper part inside each first resistance welding machine assembly 51, two second driving members 54 distributed in the front-back direction are connected. At the lower end of each second driving member 54, a first welding head 541 is fixed. Each first welding head 541 is electrically connected to the other electrode in the corresponding first resistance welding machine assembly 51 on the corresponding side. When the first driving member 52 pushes the support seat 53 upward so that the two ends of the head horizontal rib 41 respectively abut against one end of the two support beams 43 located below in the truss 4, and when the second driving member 54 pushes the first welding head 541 downward so that the first welding head 541 respectively presses one end of the two support beams 43 located below in the truss 4 against the corresponding side head horizontal rib 41, the first resistance welding machine assembly 51 is used to weld the head horizontal rib 41 and the two support beams 43 located below in the truss 4. The above-mentioned first driving member and second driving member can both adopt driving components such as cylinders, oil cylinders or servo electric cylinders. After adopting the above structure, the mechanized welding of the head horizontal rib and the truss can be realized, thereby improving the welding efficiency, reducing the labor intensity of workers and improving the welding quality. In addition, the truss head horizontal rib welding structure realizes the welding of the head horizontal rib and the support beam in the truss by resistance welding, thereby effectively eliminating the defect of environmental pollution existing in traditional gas shielded welding.

[0033] Each truss head transverse rib welding structure 5 also includes a first feeding hopper 61 and a first conveyor belt 62. Each first conveyor belt 62 is fixed inside the first resistance welding machine assembly 51 on the corresponding side. Each first feeding hopper 61 is located on one side of the feeding end of the first conveyor belt 62 on the corresponding side and is used to convey the head transverse rib 41 to the first conveyor belt 62 on the corresponding side. A first receiving chute 63 is fixed on one side of the discharging end of each first conveyor belt 62. A first sensor assembly 64 and a first pushing device are fixed on the other side of the discharging end of each first conveyor belt 62. When the first sensor assembly 64 detects that the head transverse rib 41 on the first conveyor belt 62 moves to the discharging end of the first conveyor belt 62, the first pushing device is used to push the head transverse rib 41 at the discharging end of the first conveyor belt 62 into the first receiving chute 63. A second pushing device is fixed on one side of each first receiving chute 63. Each second pushing device is used to push the head transverse rib 41 in the first receiving chute 63 on the corresponding side into the groove 531 on the support seat 53 on the corresponding side; by adopting this structure, the first feeding hopper can convey the head transverse rib to be welded to the first conveyor belt, the first conveyor belt can convey the head transverse rib to be welded to the first pushing device, the first pushing device can push the head transverse rib to be welded into the first receiving chute, and the second pushing device can push the head transverse rib in the first receiving chute into the groove on the support seat, that is, the automatic feeding of the head transverse rib can be realized; the above-mentioned first sensor assembly can adopt a proximity sensor.

[0034] Each first pusher device includes a third driving member 651 and a first push plate 652. Each third driving member 651 is fixed on the other side of the discharge end of the first conveyor belt 62 on the corresponding side. Each first push plate 652 is fixed on the driving end of the third driving member 651 on the corresponding side. Each third driving member 651 is used to drive the first push plate 652 on the corresponding side to move so that the first push plate 652 pushes the head transverse rib 41 located at the discharge end of the first conveyor belt 62 on the corresponding side into the first receiving groove 63. The above-mentioned third driving member can adopt driving components such as air cylinders, oil cylinders or servo electric cylinders. When the third driving member drives the first push plate, the first push plate can push the head transverse rib located at the discharge end of the first conveyor belt into the first receiving groove. After the head transverse rib is pushed into the first receiving groove, the third driving member can drive the first push plate to move back to its original position. Each second pusher device includes a fourth driving member 661 and a first push rod 662. Each fourth driving member 661 is fixed on one side of the first receiving groove 63. One end of each first push rod 662 is fixed to the driving end of the fourth driving member 661 on the corresponding side. Each fourth driving member 661 is used to drive the first push rod 662 on the corresponding side to move so that the first push rod 662 pushes the head transverse rib 41 located in the first receiving groove 63 on the corresponding side into the groove 531 located on the support seat 53. The above-mentioned fourth driving member can adopt driving components such as air cylinders, oil cylinders or servo electric cylinders. When the fourth driving member drives the first push rod, the first push rod can push the head transverse rib located in the first receiving groove into the groove located on the support seat. After the head transverse rib is pushed into the groove located on the support seat, the fourth driving member can drive the first push rod to move back to its original position. A baffle 532 is connected to one side of each support seat 53 away from the first push rod 662. When the first push rod 662 pushes the head transverse rib 41 located in the first receiving groove 63 into the groove 531, the baffle 532 is used to abut against one end of the head transverse rib 41 to realize the limitation of the head transverse rib 41. Through the setting of the baffle, when the first push rod pushes the head transverse rib located in the first receiving groove into the groove, the baffle can abut against one end of the head transverse rib to realize the limitation of the head transverse rib, that is, the limitation of the head transverse rib can be realized. A plurality of pairs of slots 533 are arranged at intervals along the moving direction of the first push rod 662 on one side of each support seat 53 away from the first push rod 662. Both ends of each baffle 532 are inserted into a pair of slots 533 on the corresponding side in a matching manner. After adopting this structure, when welding the two support beams located below the truss with head transverse ribs of different lengths in trusses of different widths, the baffle can be inserted into a pair of slots at different positions in a matching manner, so that the baffle can realize the limitation of head transverse ribs of different lengths, or the head transverse rib can be limited at the required position.

[0035] When welding the transverse ribs of the above-mentioned truss head and one end of the two support beams located below the truss, first, the first driving member can drive the support seat to move upward so that the two ends of the transverse ribs of the head located on the support seat respectively abut against one end of the two support beams located below in the truss. Then, the two second driving members can respectively push one of the first welding heads downward so that the two first welding heads respectively press one end of the two support beams located below in the truss against the transverse ribs of the head. At this time, the two electrodes in the first resistance welding machine assembly can form a circuit through the first welding head, the support beam in the truss, the transverse ribs of the head, and the support seat, and welding arcs can be generated between one end of the two support beams located below in the truss and the transverse ribs of the head respectively to weld the support beam and the transverse ribs of the head together. After welding is completed, the first driving member can drive the support seat to move downward to reset, and the second driving member can drive the first welding head to move upward to reset; during the above welding process, since pressure is applied between one end of the two support beams located below and the transverse ribs of the head, the support beam can be more reliably welded and fixed to the transverse ribs of the head.

[0036] Each truss head vertical bar welding structure 7 includes a second resistance welding machine assembly 71. Each second resistance welding machine assembly 71 is connected to the corresponding side of the support platform 2. A vertical plate 72 is slidably connected vertically inside each second resistance welding machine assembly 71. A fifth driving member 73 is connected to the upper part inside each vertical plate 72. A second welding head 731 is fixed on the driving end of each fifth driving member 73. Each fifth driving member 73 is used to drive the second welding head 731 on the corresponding side to move vertically. Each second welding head 731 is electrically connected to one of the electrodes of the second resistance welding machine assembly 71 on the corresponding side. A clamping assembly for clamping the head vertical bar 42 is connected to the lower end of each vertical plate 72. Each clamping assembly is electrically connected to the other electrode of the second resistance welding machine assembly 71 on the corresponding side. When the fifth driving member 73 drives the second welding head 731 to move downward so that the second welding head 731 abuts against the top of one end of the upper support beam 43 in the truss 4, the fifth driving member 73 is used to apply a thrust force to the vertical plate 72 to drive the vertical plate 72 to move upward so that the clamping assembly drives the upper end of the head vertical bar 42 to abut against the bottom of one end of the upper support beam 43 in the truss 4 and realize welding. By adopting the above structure, the truss head vertical bar welding structure can realize the mechanized welding of the head vertical bar and the truss, thereby improving the welding efficiency, reducing the labor intensity of workers and improving the welding quality. In addition, the truss head vertical bar welding structure realizes the welding of the head vertical bar and the support beam in the truss by resistance welding, thereby effectively eliminating the defect of environmental pollution existing in traditional gas shielded welding. When the above truss head vertical bar welding structure is working, when the fifth driving member drives the second welding head to move downward so that the second welding head abuts against the top of one end of the upper support beam in the truss, the fifth driving member can apply a thrust force to the vertical plate to drive the vertical plate to move upward so that the clamping assembly drives the upper end of the head vertical bar to abut against the bottom of one end of the upper support beam in the truss and realize welding. In addition, under the combined action of the fifth driving member and the vertical plate, the second welding head and the clamping assembly can freely align and clamp the center, that is, it has the function of self-centering.

[0037] A first bracket 74 is connected to the inner side of each second resistance welding machine assembly 71. Each vertical plate 72 is vertically and slidably connected to the first bracket 74 on the corresponding side. A traction member 741 is fixed to the upper end of each first bracket 74. The traction end of each traction member 741 is connected to the upper end of the vertical plate 72 on the corresponding side. When the second resistance welding machine assembly 71 does not weld the head vertical rib 42 and one end of the support beam 43 located above in the truss 4, the traction member 741 is used to traction the vertical plate 72 to prevent the vertical plate 72 from freely falling. Through the arrangement of the traction member, when the second resistance welding machine assembly does not weld the head vertical rib and one end of the support beam located above in the truss, the traction member can traction the vertical plate to prevent the vertical plate from freely falling. The above vertical plate is vertically and slidably connected to the first bracket by a structure of sliding connection between a slider and a slide rail, and the above traction member is a cylinder. The magnitude of the traction force exerted by the cylinder on the vertical plate can be achieved by adjusting the air pressure of the air source connected to the cylinder. A second bracket 75 is fixed to the inner side of each second resistance welding machine assembly 71. Each first bracket 74 is vertically and slidably connected to the second bracket 75 on the corresponding side. A sixth driving member 751 is fixed to the upper end of each second bracket 75. The driving end of each sixth driving member 751 is fixed to the upper end of the first bracket 74 on the corresponding side. Each sixth driving member 751 is used to drive the first bracket 74 on the corresponding side to move vertically to adjust the initial positions of the second welding head 731 and the clamping assembly on the corresponding side. After adopting this structure, the sixth driving member can drive the first bracket to move vertically to adjust the initial positions of the second welding head and the clamping assembly, that is, the second welding head and the clamping assembly can be adjusted to a suitable height to meet the welding requirements for the head vertical rib. The above first bracket is vertically and slidably connected to the second bracket by a structure of sliding connection between a slider and a slide rail, and the above sixth driving member is a cylinder. The adjustment of the height of the second welding head and the clamping assembly can be achieved by adjusting the driving stroke of the sixth driving member.

[0038] Each clamping assembly includes a seventh driving member 76 and two first clamping arms 77. The two first clamping arms 77 in each clamping assembly are rotatably connected to the lower end of the corresponding vertical plate 72. Both ends of each seventh driving member 76 are respectively rotatably connected to the outer end of one of the first clamping arms 77 on the corresponding side. Each seventh driving member 76 is used to drive the two first clamping arms 77 on the corresponding side to rotate relative to each other so that the inner ends of the two first clamping arms 77 clamp or release the head rib 42. The above-mentioned seventh driving member can be a cylinder. When the seventh driving member extends, the seventh driving member can drive the outer ends of the corresponding two first clamping arms to move away from each other. At this time, the inner ends of the two first clamping arms can move closer to each other and clamp the head rib. When the seventh driving member contracts, the seventh driving member can drive the outer ends of the corresponding two first clamping arms to move closer to each other. At this time, the inner ends of the two first clamping arms can move away from each other and release the head rib. Each second resistance welding machine assembly 71 is connected to the corresponding support platform 2 in a left-right movable manner. A first driving assembly 78 is connected to each support platform 2. Each second resistance welding machine assembly 71 is connected to the driving end of the first driving assembly 78 on the corresponding side. Each first driving assembly 78 is used to drive the second resistance welding machine assembly 71 on the corresponding side to move left and right relative to the support platform 2 so that the second welding head 731 and the clamping assembly approach or move away from the end of the truss 4. By adopting this structure, since the first driving assembly can drive the second resistance welding machine assembly to move left and right relative to the corresponding support platform so that the second welding head and the clamping assembly approach or move away from the end of the truss, when the second welding head and the clamping assembly weld the head rib and the truss, the second welding head and the clamping assembly can be close to the truss. After the welding of the head rib and the truss is completed, the second welding head and the clamping assembly can move away from the truss. At this time, the second welding head and the clamping assembly can avoid the truss, that is, when the truss needs to move subsequently, interference between the second welding head and the clamping assembly and the truss can be avoided. The above-mentioned first driving assembly can adopt a servo driving mechanism. The servo driving mechanism is an existing mechanism on the current market, so it will not be elaborated here.

[0039] Each truss head vertical rib welding structure 7 also includes a third resistance welding machine assembly 81, a moving frame 82, a second driving assembly, an eighth driving member 83, and two second clamping arms 84. Each third resistance welding machine assembly 81 is fixed on the support platform 2 on the corresponding side. Each moving frame 82 is vertically slidably connected to the support platform 2 on the corresponding side. Each second driving assembly is connected to the support platform 2 on the corresponding side. Each moving frame 82 is connected to the driving end of the second driving assembly on the corresponding side. Each second driving assembly is used to drive the moving frame 82 on the corresponding side to move vertically. The two second clamping arms 84 in each truss head vertical rib welding structure 7 are rotatably connected to the moving frame 82 on the corresponding side. The two ends of each eighth driving member 83 are respectively rotatably connected to the lower ends of the two second clamping arms 84 on the corresponding side. Each eighth driving member 83 is used to drive the two second clamping arms 84 on the corresponding side to rotate relative to each other so that the upper ends of the two second clamping arms 84 on the corresponding side approach or move away from each other. The two second clamping arms 84 in each truss head vertical rib welding structure 7 are respectively electrically connected to the two electrodes of the third resistance welding machine assembly 81 on the corresponding side; when the eighth driving member 83 drives the two second clamping arms 84 to rotate relative to each other so that the upper ends of the two second clamping arms 84 approach each other, the upper ends of the two second clamping arms 84 are used to clamp the lower end of the head vertical rib 42 and the head horizontal rib 41 located at the end of the truss 4 to realize the welding of the lower end of the head vertical rib 42 and the head horizontal rib 41; after adopting this structure, after the upper end of the head vertical rib is welded to one end of the upper support beam in the truss, the second driving assembly can drive the moving frame to move upward. After the moving frame moves upward, the eighth driving member can drive the corresponding two second clamping arms to rotate relative to each other so that the upper ends of the two second clamping arms approach each other and clamp the lower end of the head vertical rib and the head horizontal rib located at the end of the truss. At this time, the two electrodes in the third resistance welding machine assembly can form a circuit through one second clamping arm, the head vertical rib, the head horizontal rib, and the other second clamping arm, and a welding arc can be generated between the lower end of the head vertical rib and the head horizontal rib located at the end of the truss to weld the lower end of the head vertical rib and the head horizontal rib together. After the welding is completed, the eighth driving member can drive the upper ends of the corresponding two second clamping arms to move away from each other and release the head vertical rib and the head horizontal rib. Subsequently, the second driving assembly can drive the moving frame to move downward and reset; the above-mentioned eighth driving member can be a cylinder, and the above-mentioned second driving assembly can be a cylinder or a servo driving mechanism. The servo driving mechanism is an existing mechanism on the current market, so it will not be elaborated here.

[0040] Each truss head vertical bar welding structure 7 also includes a second feeding hopper 91, a second conveyor belt 92 and a manipulator assembly 93. Each second feeding hopper 91 and manipulator assembly 93 are fixed on the support platform 2 on the corresponding side. Each second conveyor belt 92 is fixed inside the second feeding hopper 91 on the corresponding side. Each second feeding hopper 91 is used to convey the head vertical bar 42 to the second conveyor belt 92 on the corresponding side. On one side of the discharge end of each second conveyor belt 92, a second receiving trough 94 is fixed. On the other side of the discharge end of each second conveyor belt 92, a second sensor assembly 95 and a third pushing device are fixed. When the second sensor assembly 95 detects that the head vertical bar 42 located on the second conveyor belt 92 moves to the discharge end of the second conveyor belt 92, the third pushing device is used to push the head vertical bar 42 located at the discharge end of the second conveyor belt 92 into the second receiving trough 94. On one side of each second receiving trough 94, a fourth pushing device is fixed. Each fourth pushing device is used to push the head vertical bar 42 located in the second receiving trough 94 on the corresponding side so that one end of the head vertical bar 42 abuts against the inner wall on the other side of the second receiving trough 94 on the corresponding side. Each manipulator assembly 93 is used to grab the head vertical bar 42 located in the second receiving trough 94 on the corresponding side, rotate the head vertical bar 42 to the vertical state and then move it between the clamping assembly and the truss 4 on the corresponding side; By adopting this structure, the second feeding hopper can convey the head vertical bar to be welded to the second conveyor belt. The second conveyor belt can convey the head vertical bar to be welded to the third pushing device. The third pushing device can push the head vertical bar to be welded into the second receiving trough. The fourth pushing device can push the head vertical bar located in the second receiving trough so that one end of the head vertical bar abuts against the inner wall on the other side of the second receiving trough, that is, the positioning of the head vertical bar in the second receiving trough can be realized. The manipulator assembly can grab the head vertical bar located in the second receiving trough, rotate the head vertical bar to the vertical state and then move it between the clamping assembly and the truss, thus realizing the automatic feeding of the head vertical bar; The above-mentioned second sensor assembly can adopt a proximity sensor; Each third pushing device includes a ninth driving member 961 and a second pushing plate 962. Each ninth driving member 961 is fixed on the other side of the discharge end of the second conveyor belt 92 on the corresponding side. Each second pushing plate 962 is fixed on the driving end of the ninth driving member 961 on the corresponding side. Each ninth driving member 961 is used to drive the second pushing plate 962 on the corresponding side to move so that the second pushing plate 962 pushes the head vertical bar 42 located at the discharge end of the second conveyor belt 92 on the corresponding side into the second receiving trough 94 on the corresponding side; The above-mentioned ninth driving member can adopt driving components such as a cylinder, an oil cylinder or a servo electric cylinder. When the ninth driving member drives the second pushing plate, the second pushing plate can push the head vertical bar located at the discharge end of the second conveyor belt into the second receiving trough. After the head vertical bar is pushed into the second receiving trough, the ninth driving member can drive the second pushing plate to move back to its original position;Each fourth pusher device includes a tenth driver 971 and a second push rod 972. Each tenth driver 971 is fixed to one side of the second receiving groove 94 on the corresponding side. One end of each second push rod 972 is fixed to the driving end of the tenth driver 971 on the corresponding side. Each tenth driver 971 is used to drive the second push rod 972 on the corresponding side to push the head vertical rib 42 located in the second receiving groove 94 on the corresponding side so that one end of the head vertical rib 42 abuts against the inner wall on the other side of the second receiving groove 94 on the corresponding side. The above-mentioned tenth driver can adopt driving components such as air cylinders, oil cylinders or servo electric cylinders. When the tenth driver drives the second push rod, the second push rod can push the head vertical rib located in the second receiving groove so that one end of the head vertical rib abuts against the inner wall on the other side of the second receiving groove, that is, the positioning of the head vertical rib in the second receiving groove can be realized. After the head vertical rib is pushed by the second push rod and positioned, the tenth driver can drive the second push rod to move back to its original position. A notch 941 is provided at the lower edge of each second receiving groove 94. Each notch 941 is used to avoid the gripper in the manipulator assembly 93 on the corresponding side so as to facilitate the gripper in the manipulator assembly 93 to pick up the head vertical rib 42 located in the second receiving groove 94 on the corresponding side. Through the setting of the notch, the notch can avoid the gripper in the manipulator assembly so as to facilitate the gripper in the manipulator assembly to pick up the head vertical rib located in the second receiving groove.;

[0041] When welding the vertical bars of the head and one end of the support beam located above the truss in the above-mentioned vertical bar welding structure of the truss head, first, the manipulator assembly can grasp the vertical bars of the head located in the second receiving groove, rotate the vertical bars of the head to the vertical state, and then move them between the clamping assembly and the truss. Next, the first driving assembly can drive the second resistance welding machine assembly to move relative to the corresponding support platform so that the clamping assembly approaches the vertical bars of the head located on the manipulator assembly. Immediately afterwards, the clamping assembly can clamp the vertical bars of the head located on the manipulator assembly. After the clamping assembly clamps the vertical bars of the head located on the manipulator assembly, the manipulator assembly can release the vertical bars of the head and reset. Then, the first driving assembly can continue to drive the second resistance welding machine assembly to move relative to the corresponding support platform so that the second welding head and the clamping assembly approach the end of the truss (at this time, the vertical bars of the head can be moved below one end of the support beam located above the truss). Then, the fifth driving member drives the second welding head to move downward so that the second welding head abuts against the top of one end of the upper support beam in the truss. When the second welding head abuts against the top of one end of the upper support beam in the truss, during the continuous extension of the fifth driving member, the fifth driving member can apply a thrust to the vertical plate to drive the vertical plate to move upward so that the clamping assembly drives the upper end of the vertical bars of the head to abut against the bottom of one end of the upper support beam in the truss (the second welding head and the clamping assembly can apply a clamping force to the vertical bars of the head and one end of the upper support beam in the truss. In addition, during the above process, the second welding head and the clamping assembly can float and automatically position the clamping center and the welding center). At this time, the two electrodes in the second resistance welding machine assembly can form a circuit through the second welding head, the upper support beam in the truss, the vertical bars of the head, and the clamping assembly, and a welding arc can be generated between the upper end of the vertical bars of the head and the upper support beam in the truss to weld the upper end of the vertical bars of the head and the upper support beam in the truss together. After welding is completed, the clamping assembly can release the vertical bars of the head. Then, the first driving member can drive the second welding head to move upward and reset. Then, the first driving assembly can drive the second resistance welding machine assembly to move relative to the support platform so that the second welding head and the clamping assembly move away from the truss (during the above welding process, since pressure is applied between the vertical bars of the head and the upper support beam in the truss, the upper end of the vertical bars of the head can be more reliably welded and fixed to the upper support beam in the truss);Subsequently, the second driving component can drive the moving frame to move upward. After the moving frame moves upward, the eighth driving member can drive the two second clamping arms to rotate relative to each other so that the upper ends of the two second clamping arms approach each other and clamp the lower end of the head vertical rib and the head horizontal rib located at the end of the truss. At this time, the two electrodes in the third resistance welding machine assembly can form a circuit through one of the second clamping arms, the head vertical rib, the head horizontal rib, and the other second clamping arm, and a welding arc can be generated between the lower end of the head vertical rib and the head horizontal rib located at the end of the truss to weld the lower end of the head vertical rib and the head horizontal rib together. After welding is completed, the eighth driving member can drive the upper ends of the two second clamping arms to move away from each other and release the head vertical rib and the head horizontal rib. Finally, the second driving component can drive the moving frame to move downward and reset; after the above process, the upper end of the head vertical rib can be welded and fixed to the support beam located above in the truss, and the lower end of the head vertical rib can be welded and fixed to the head horizontal rib located at the end of the truss.

[0042] The two support platforms 2 are both connected to the support frame 1 in a left-right movable manner. On the front and rear sides of the upper end of the support frame 1, support rails 101 extending from left to right are fixedly provided. On the front and rear sides of the lower end of each support platform 2, a plurality of roller assemblies 102 spaced from left to right are fixedly provided. Each roller assembly 102 is rollably connected to the support rail 101 on the corresponding side. By adopting this structure, the support platform can be reliably connected to the support frame through the roller assemblies and the support rails and can move left and right relative to the support frame. The lower end of each support platform 2 is connected with a driving mechanism, and each driving mechanism is used to drive the support platform 2 at the corresponding position to move left and right relative to the support frame 1 so as to adjust the distance between the two resistive welding units and the two conveyor belt assemblies 3. Through the arrangement of the driving mechanism, the driving mechanism can drive the support platform at the corresponding position to move left and right relative to the support frame, thus facilitating the left and right movement of the support platform relative to the support frame, that is, facilitating the adjustment of the distance between the two resistive welding units and the two conveyor belt assemblies. Each driving mechanism includes a speed reducer 103 and a rotating shaft 104. Each speed reducer 103 is fixedly provided at the lower end of the support platform 2 at the corresponding position. Each rotating shaft 104 extends from front to back and is in transmission connection with the output end of the speed reducer 103 at the corresponding position. Gears 105 are fixedly provided at the front and rear ends of each rotating shaft 104. Rack bars 106 extending from left to right are fixedly provided on the front and rear sides of the bottom of the support frame 1. Each gear 105 meshes with the rack bar 106 on the corresponding side. By adopting this driving mechanism, when the speed reducer drives the rotating shaft to rotate, the rotating shaft can drive the gear to rotate. When the gear rotates, the gear can move along the length direction of the rack bar. At this time, the support platform can be made to move left and right relative to the support frame, and the adjustment of the distance between the two resistive welding units and the two conveyor belt assemblies can be conveniently realized. Each rotating shaft 104 is rotatably connected to the lower end of the support platform 2 through a plurality of bearing seat assemblies 107 spaced from front to back. Through the arrangement of the bearing seat assemblies, the rotating shaft can be reliably rotatably connected to the lower end of the support platform through the bearing seat assemblies, and the reliability of the transmission connection between the rotating shaft and the speed reducer can be improved, and the reliability of the meshing between the gear and the rack bar can be improved. By adopting the above structure, the distance between the two conveyor belt assemblies and the two resistive welding units inside the present invention can be adjusted according to the length of the truss, thus facilitating the welding of the truss heads of trusses of different lengths. That is, when the length of the truss is short, the two conveyor belt assemblies and the two resistive welding units can be made to approach each other. When the length of the truss is long, the two conveyor belt assemblies and the two resistive welding units can be made to move away from each other. That is, the distance between the two conveyor belt assemblies and the two resistive welding units can be adjusted according to the length of the truss. After the adjustment of the distance between the two conveyor belt assemblies and the two resistive welding units is completed, the two conveyor belt assemblies can respectively support one end of the truss and drive the truss to move forward one by one from back to front.

[0043] When the present invention is working, first, the conveyor belt assemblies located on the two support platforms can drive the truss located on the conveyor belt assemblies to move from the rear to the front (the two ends of the truss are respectively supported on one of the conveyor belt assemblies). When the truss moves to the position where the transverse rib welding structure of the truss head is located, the two transverse rib welding structures of the truss head can respectively weld the transverse ribs at the two ends of the truss. After the transverse ribs are welded to the ends of the truss, the conveyor belt assemblies can drive the truss to move from the rear to the front again to the position where the vertical rib welding structure of the truss head is located. When the truss moves to the position where the vertical rib welding structure of the truss head is located, the two vertical rib welding structures of the truss head can respectively weld the vertical ribs at the two ends of the truss. After the vertical ribs are welded to the ends of the truss, the conveyor belt assemblies can drive the truss to move from the rear to the front again to discharge the truss.

[0044] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A truss head welding device, characterized in that: It includes a support frame and two support platforms both connected to the support frame and spaced apart in the left-right direction. On the outer side of the upper end of each support platform, a resistance welding unit is fixed. On the inner side of the upper end of each support platform, a conveyor belt assembly extending from the rear to the front is fixed. The two resistance welding units and the two conveyor belt assemblies are both arranged symmetrically left and right. The two conveyor belt assemblies are respectively used to support one end of the truss and drive the truss to move from the rear to the front. The two resistance welding units are respectively used to weld the truss head at one end of the truss. Each resistance welding unit includes a truss head horizontal rib welding structure and a truss head vertical rib welding structure fixed on the support platform in sequence from the rear to the front. Each truss head horizontal rib welding structure is used to weld the head horizontal rib to one end of the truss. Each truss head vertical rib welding structure is used to weld the head vertical rib to one end of the truss. Each truss head horizontal rib welding structure includes a first resistance welding machine assembly. At the bottom inside each first resistance welding machine assembly, a first driving member is fixed. At the upper end of each first driving member, a support seat for supporting the head horizontal rib is fixed. Each support seat is electrically connected to one of the electrodes in the corresponding first resistance welding machine assembly on the corresponding side. At the upper end of each support seat, a groove for partially embedding the head horizontal rib is provided. At the upper part inside each first resistance welding machine assembly, two second driving members distributed in the front-rear direction are connected. At the lower end of each second driving member, a first welding head is fixed. Each first welding head is electrically connected to the other electrode in the corresponding first resistance welding machine assembly on the corresponding side. When the first driving member pushes the support seat upward so that the two ends of the head horizontal rib respectively abut against one end of the two support beams located below in the truss and when the second driving member pushes the first welding head downward so that the first welding head respectively presses one end of the two support beams located below in the truss against the head horizontal rib on the corresponding side, the first resistance welding machine assembly is used to weld the head horizontal rib and the two support beams located below in the truss.Each of the transverse rib welding structures of the truss head also includes a first feeding hopper and a first conveyor belt. Each of the first conveyor belts is fixed inside the first resistance welding machine assembly on the corresponding side. Each of the first feeding hoppers is located on one side of the feeding end of the first conveyor belt on the corresponding side and is used to convey the transverse ribs of the head to the first conveyor belt on the corresponding side. A first receiving trough is fixed on one side of the discharging end of each of the first conveyor belts. A first sensor assembly and a first pushing device are fixed on the other side of the discharging end of each of the first conveyor belts. When the first sensor assembly detects that the transverse rib of the head located on the first conveyor belt moves to the discharging end of the first conveyor belt, the first pushing device is used to push the transverse rib of the head located at the discharging end of the first conveyor belt into the first receiving trough. A second pushing device is fixed on one side of each of the first receiving troughs. Each of the second pushing devices is used to push the transverse rib of the head located in the first receiving trough on the corresponding side into the groove on the support seat on the corresponding side; Each of the vertical rib welding structures of the truss head includes a second resistance welding machine assembly. Each of the second resistance welding machine assemblies is connected to the support platform on the corresponding side. A vertical plate is vertically slidably connected inside each of the second resistance welding machine assemblies. A fifth driving member is connected to the upper part inside each of the vertical plates. A second welding head is fixed on the driving end of each of the fifth driving members. Each of the fifth driving members is used to drive the second welding head on the corresponding side to move vertically. Each of the second welding heads is electrically connected to one of the electrodes of the second resistance welding machine assembly on the corresponding side. A clamping assembly for clamping the vertical rib of the head is connected to the lower end of each of the vertical plates. Each of the clamping assemblies is electrically connected to the other electrode of the second resistance welding machine assembly on the corresponding side; After the fifth driving member drives the second welding head to move downward so that the second welding head abuts against the top of one end of the upper support beam in the truss, the fifth driving member is used to apply a thrust to the vertical plate to drive the vertical plate to move upward so that the clamping assembly drives the upper end of the head vertical rib to abut against the bottom of one end of the upper support beam in the truss and realize welding.

2. The truss head welding device according to claim 1, characterized in that Each of the first pushing devices includes a third driving member and a first pushing plate. Each of the third driving members is fixed on the other side of the discharging end of the corresponding first conveyor belt. Each of the first pushing plates is fixed on the driving end of the corresponding third driving member. Each of the third driving members is used to drive the corresponding first pushing plate to move so that the first pushing plate pushes the head horizontal rib at the discharging end of the corresponding first conveyor belt into the first receiving groove; Each of the second pushing devices includes a fourth driving member and a first push rod. Each of the fourth driving members is fixed on one side of the first receiving groove. One end of each of the first push rods is fixed to the driving end of the corresponding fourth driving member. Each of the fourth driving members is used to drive the corresponding first push rod to move so that the first push rod pushes the head horizontal rib in the corresponding first receiving groove into the groove on the support seat; A baffle is connected to one side of each support seat away from the first push rod. When the first push rod pushes the head horizontal rib in the first receiving groove into the groove, the baffle is used to abut against one end of the head horizontal rib to limit the head horizontal rib; A plurality of pairs of slots are arranged at intervals along the moving direction of the first push rod on one side of each support seat away from the first push rod. Both ends of each baffle are inserted and matched with one of the pairs of slots on the corresponding side.

3. The truss head welding device according to claim 1, characterized in that A first bracket is connected to the inner side of each of the second resistance welding machine assemblies. Each vertical plate is vertically slidably connected to the corresponding first bracket. A traction member is fixed to the upper end of each first bracket. The traction end of each traction member is connected to the upper end of the corresponding vertical plate; When the second resistance welding machine assembly does not weld the head vertical rib and one end of the upper support beam in the truss, the traction member is used to traction the vertical plate to prevent the vertical plate from falling freely; A second bracket is fixed to the inner side of each of the second resistance welding machine assemblies. Each first bracket is vertically slidably connected to the corresponding second bracket. A sixth driving member is fixed to the upper end of each second bracket. The driving end of each sixth driving member is fixed to the upper end of the corresponding first bracket. Each sixth driving member is used to drive the corresponding first bracket to move vertically to adjust the initial positions of the second welding head and the clamping assembly on the corresponding side.

4. The truss head welding device according to claim 1 or 3, characterized in that Each of the clamping assemblies includes a seventh driving member and two first clamping arms. The two first clamping arms in each clamping assembly are rotatably connected to the lower ends of the vertical plates on the corresponding side. Both ends of each seventh driving member are respectively rotatably connected to the outer ends of one of the first clamping arms on the corresponding side. Each seventh driving member is configured to drive the two first clamping arms on the corresponding side to rotate relative to each other so that the inner ends of the two first clamping arms clamp or release the head vertical ribs. Each second resistance welding machine assembly is connected to the support platform on the corresponding side in a left-right movable manner. A first driving assembly is connected to each support platform. Each second resistance welding machine assembly is connected to the driving end of the first driving assembly on the corresponding side. Each first driving assembly is configured to drive the second resistance welding machine assembly on the corresponding side to move left and right relative to the support platform so that the second welding head and the clamping assembly approach or move away from the end of the truss.

5. The truss head welding device according to claim 1, wherein, each of the truss head vertical rib welding structures further includes a third resistance welding machine assembly, a moving frame, a second driving assembly, an eighth driving member, and two second clamping arms. Each third resistance welding machine assembly is fixed on the support platform on the corresponding side. Each moving frame is vertically slidably connected to the support platform on the corresponding side. Each second driving assembly is connected to the support platform on the corresponding side. Each moving frame is connected to the driving end of the second driving assembly on the corresponding side. Each second driving assembly is configured to drive the moving frame on the corresponding side to move vertically. The two second clamping arms in each truss head vertical rib welding structure are rotatably connected to the moving frame on the corresponding side. Both ends of each eighth driving member are respectively rotatably connected to the lower ends of the two second clamping arms on the corresponding side. Each eighth driving member is configured to drive the two second clamping arms on the corresponding side to rotate relative to each other so that the upper ends of the two second clamping arms on the corresponding side approach or move away from each other. The two second clamping arms in each truss head vertical rib welding structure are respectively electrically connected to the two electrodes of the third resistance welding machine assembly on the corresponding side; when the eighth driving member drives the two second clamping arms to rotate relative to each other so that the upper ends of the two second clamping arms approach each other, the upper ends of the two second clamping arms are configured to clamp the lower end of the head vertical rib and the head horizontal rib located on the end of the truss to achieve welding of the lower end of the head vertical rib and the head horizontal rib.

6. The truss head welding device according to claim 1, wherein, Each of the vertical bar welding structures of the truss head also includes a second feeding hopper, a second conveyor belt, and a manipulator assembly. Each of the second feeding hoppers and the manipulator assemblies is fixed on the support platform on the corresponding side. Each of the second conveyor belts is fixed inside the second feeding hopper on the corresponding side. Each of the second feeding hoppers is used to convey the vertical bars of the head to the second conveyor belt on the corresponding side. On one side of the discharge end of each of the second conveyor belts, a second receiving trough is fixed. On the other side of the discharge end of each of the second conveyor belts, a second sensor assembly and a third pushing device are fixed. When the second sensor assembly detects that the vertical bar of the head located on the second conveyor belt moves to the discharge end of the second conveyor belt, the third pushing device is used to push the vertical bar of the head located at the discharge end of the second conveyor belt into the second receiving trough. On one side of each of the second receiving troughs, a fourth pushing device is fixed. Each of the fourth pushing devices is used to push the vertical bar of the head located in the second receiving trough on the corresponding side so that one end of the vertical bar of the head abuts against the inner wall on the other side of the second receiving trough on the corresponding side. Each of the manipulator assemblies is used to grab the vertical bar of the head located in the second receiving trough on the corresponding side, rotate the vertical bar of the head to a vertical state, and then move it between the clamping assembly and the truss on the corresponding side; Each of the third pushing devices includes a ninth driving member and a second pushing plate. Each of the ninth driving members is fixed on the other side of the discharge end of the second conveyor belt on the corresponding side. Each of the second pushing plates is fixed on the driving end of the ninth driving member on the corresponding side. Each of the ninth driving members is used to drive the second pushing plate on the corresponding side to move so that the second pushing plate pushes the vertical bar of the head located at the discharge end of the second conveyor belt on the corresponding side into the second receiving trough on the corresponding side; Each of the fourth pushing devices includes a tenth driving member and a second push rod. Each of the tenth driving members is fixed on one side of the second receiving trough on the corresponding side. One end of each of the second push rods is fixed to the driving end of the tenth driving member on the corresponding side. Each of the tenth driving members is used to drive the second push rod on the corresponding side to push the vertical bar of the head located in the second receiving trough on the corresponding side so that one end of the vertical bar of the head abuts against the inner wall on the other side of the second receiving trough on the corresponding side; At the lower edge of each of the second receiving troughs, a notch is provided. Each of the notches is used to avoid the clamping jaws in the manipulator assembly on the corresponding side so as to facilitate the clamping jaws in the manipulator assembly to clamp the vertical bar of the head located in the second receiving trough on the corresponding side.

7. The truss head welding device according to claim 1, characterized in that Both of the two support platforms are connected to the support frame so as to be movable left and right. On the front and rear sides of the upper end of the support frame, support rails extending from left to right are fixed. On the front and rear sides of the lower end of each support platform, a plurality of roller assemblies spaced from left to right are fixed. Each roller assembly is rollingly connected to the support rail on the corresponding side. The lower end of each support platform is connected with a driving mechanism. Each driving mechanism is used to drive the support platform at the corresponding position to move left and right relative to the support frame so as to adjust the distance between the two resistive welding units and the two conveyor belt assemblies. Each driving mechanism includes a speed reducer and a rotating shaft. Each speed reducer is fixed to the lower end of the support platform at the corresponding position. Each rotating shaft extends from front to back and is in transmission connection with the output end of the speed reducer at the corresponding position. Gears are fixed to the front and rear ends of each rotating shaft. On the front and rear sides of the bottom of the support frame, racks extending from left to right are fixed. Each gear meshes with the rack on the corresponding side. Each rotating shaft is rotatably connected to the lower end of the support platform through a plurality of bearing seat assemblies spaced from front to back.

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