A steel bar truss end capping machine

Abstract

The present invention provides a steel bar truss end head machine, which includes a frame, a transformer arranged under the frame, and a workbench arranged on the frame. A welding cross bar mechanism, a welding upper chord bar mechanism, a welding lower chord bar mechanism, a gantry, a feeding mechanism, a vertical bar storage and pushing mechanism, a horizontal bar storage and pushing mechanism and a steel bar truss are arranged on the workbench. Both the vertical bar storage and pushing mechanism and the horizontal bar storage and pushing mechanism include a storage box and a pushing cylinder, and the pushing cylinder pushes the steel bars in the storage box out to supply materials for the welding cross bar mechanism. The feeding mechanism includes an X-axis linear module and a feeding gripper fixedly connected to a first slider of the X-axis linear module. The welding upper chord bar mechanism includes a Z-axis linear module fixed on the gantry, and a third slider of the Z-axis linear module is fixedly connected to a fifth gripper arm and a sixth gripper arm. Through an automated welding structure combined with a welding method using electric discharge, the floor area occupied by manual and hand-operated work is reduced, and the cost is further lowered.

Description

Technical Field

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

[0002] During the production process of steel bar trusses, a cross needs to be welded at one end for head sealing treatment. Currently, this process is entirely manual. Manual welding not only has a slow speed, but also consumes a large amount of welding rods, resulting in high costs. The welded products are not aesthetically pleasing, and the firmness of the weld points cannot be guaranteed. The welding fumes and arc light also have a great impact on the workshop environment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the problems existing in the prior art and provide a steel bar truss head sealing machine.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a steel bar truss head sealing machine, including a frame, a transformer arranged under the frame, and a workbench arranged on the frame. A cross welding mechanism, an upper chord bar welding mechanism, a lower chord bar welding mechanism, a gantry, a feeding mechanism, a vertical bar storage and pushing mechanism, a horizontal bar storage and pushing mechanism, and a steel bar truss are arranged on the workbench; both the vertical bar storage and pushing mechanism and the horizontal bar storage and pushing mechanism include a storage box and a pushing cylinder, and the pushing cylinder pushes the steel bars in the storage box out to supply materials for the cross welding mechanism; the feeding mechanism includes an X-axis linear module and a feeding gripper fixedly connected to the first slider of the X-axis linear module; the cross welding mechanism includes a Y-axis cylinder and a first gripper arm and a second gripper arm fixedly connected to the Y-axis cylinder. A first electrode is arranged on the first gripper arm, and a second electrode is arranged on the second gripper arm; the lower chord bar welding mechanism includes a third gripper arm and a fourth gripper arm. A third electrode is arranged on the third gripper arm, and a fourth electrode is arranged on the fourth gripper arm; the upper chord bar welding mechanism includes a Z-axis motor fixed on the gantry and an upper chord bar welding positioning plate assembly. The lead screw nut seat of the Z-axis motor is fixedly connected to the third slider. A positioning plate assembly, a fifth gripper arm, a sixth gripper arm, and an upper chord bar welding cylinder are fixed on the third slider. The piston rod of the upper chord bar welding cylinder is fixedly connected to the fifth gripper arm and the sixth gripper arm. Sixth electrodes are fixed on both the fifth gripper arm and the sixth gripper arm, and a fifth electrode is fixed on one side of the upper chord bar welding positioning plate assembly close to the fifth gripper arm and the sixth gripper arm.

[0005] Further, there are two groups of the lower chord bar welding mechanisms. One group of the lower chord bar welding mechanisms is arranged on one side of the steel bar truss, and the other group of the lower chord bar welding mechanisms is arranged on the other side of the steel bar truss.

[0006] Further, the X-axis linear module includes a motor, a lead screw fixedly connected to the output shaft of the motor, and a nut seat sleeved on the lead screw and threadedly connected to the lead screw.

[0007] Further, the feeding mechanism includes a feeding fixed plate disposed on the workbench. An X-axis linear module is provided on the feeding fixed plate. A first slider is fixed on the nut seat of the X-axis linear module. A feeding gripper is fixed on the first slider. The feeding gripper control cylinder is fixedly connected to the feeding gripper to control the opening or closing of the feeding gripper.

[0008] Further, the piston rod of the Y-axis cylinder is fixedly connected to the welding cross bar fixed plate. The welding cross bar fixed plate is respectively fixedly connected to one ends of a first gripper arm and a second gripper arm through a first rotating shaft and a second rotating shaft. A welding cross bar cylinder is fixed at the other end of the first gripper arm. The piston rod of the welding cross bar cylinder is fixedly connected to the other end of the second gripper arm. A first electrode mounting seat is fixed on the first gripper arm. A second electrode mounting seat is fixed on the second gripper arm. A first electrode is mounted on the first electrode mounting seat. A first electrode is mounted on the second electrode mounting seat.

[0009] Further, the lower chord welding mechanism includes a third gripper arm fixed on the workbench. One end of the third gripper arm is fixedly connected to one end of a fourth gripper arm through a third rotating shaft. A lower chord welding cylinder is fixed at the other end of the third gripper arm. The piston rod of the lower chord welding cylinder is fixedly connected to the other end of the fourth gripper arm.

[0010] Further, the piston rod of the upper chord welding cylinder is fixedly connected to the upper chord welding fixed frame. A upper chord welding gripper control cylinder and an upper chord welding guide rail are fixed on the upper chord welding fixed frame. An upper chord welding slider is slidably connected to the upper chord welding guide rail. Adjustable connecting rods are fixed on both the left and right sides of the upper chord welding slider. The two adjustable connecting rods are respectively rotatably connected to one ends of a fifth gripper arm and a sixth gripper arm. The other ends of the fifth gripper arm and the sixth gripper arm are rotatably connected to the upper chord welding fixed frame through a fourth rotating shaft. The piston rod of the upper chord welding gripper control cylinder is fixedly connected to the upper chord welding slider.

[0011] Further, an upper chord welding positioning plate assembly is provided on the gantry. The upper chord welding positioning plate assembly includes an upper chord welding side plate and an upper chord welding panel. An upper chord welding positioning guide rail is fixed on the upper chord welding side plate. An upper chord welding positioning slider is slidably connected to the upper chord welding positioning guide rail. The upper chord welding positioning slider is fixedly connected to one side of the upper chord welding fixed frame. A fifth electrode is fixed on one side of the upper chord welding panel close to the upper chord welding fixed frame.

[0012] Further, a copper block is fixed on one side of the fifth electrode. The copper block is fixed on the upper chord welding movable plate. A guide pillar and bushing is fixed on one side of the copper block. A spring is fixed on one side of the guide pillar and bushing.

[0013] Further, the discharge electrodes of the transformer are electrically connected to the first electrode, the second electrode, the third electrode, the fourth electrode, the fifth electrode, and the sixth electrode respectively.

[0014] The present invention has the following beneficial effects compared with the prior art:

[0015] The steel bar truss head machine provided by the present invention, through an automated welding structure combined with a discharge welding method, reduces the floor area of manual and handwork operations, further reduces costs. At the same time, using the discharge welding method, no welding rod is required, which reduces costs. At the same time, the product is beautiful, the welding fastness is reliable, no defective products will appear, and at the same time, the workshop environment is improved, and the electric welding light pollution and air pollution in the workshop are completely eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic diagram of the positions of the various mechanisms of the present invention;

[0018] Figure 3 is a schematic structural diagram of the X-axis linear module of the present invention;

[0019] Figure 4 is a schematic structural diagram of the cross welding mechanism of the present invention;

[0020] Figure 5 is a schematic structural diagram of the upper chord bar welding mechanism of the present invention;

[0021] Figure 6 is a side cross-sectional view of the upper chord bar panel welding of the present invention;

[0022] Figure 7 is a schematic rear structure diagram of the upper chord bar fixing frame welding of the present invention;

[0023] Figure 8 is a schematic front structure diagram of the upper chord bar fixing frame welding of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-8, a steel bar truss end capping machine, comprising a frame 1, a transformer 2 arranged under the frame 1, and a workbench 3 arranged on the frame 1. A welding cross bar mechanism 4, a welding upper chord bar mechanism 5, a welding lower chord bar mechanism 6, a gantry 7, a feeding mechanism 8, a vertical bar storage and pushing mechanism 9, a horizontal bar storage and pushing mechanism 10 and a steel bar truss 11 are arranged on the workbench 3; both the vertical bar storage and pushing mechanism 9 and the horizontal bar storage and pushing mechanism 10 include a storage box 12 and a pushing cylinder 13, and the pushing cylinder 13 pushes the steel bars in the storage box 12 out to supply materials for the welding cross bar mechanism 4; the feeding mechanism 8 includes an X-axis linear module 81 and a feeding jaw 83 fixedly connected to a first slider 82 of the X-axis linear module 81; the welding cross bar mechanism 4 includes a Y-axis cylinder 41 and a first jaw arm 42 and a second jaw arm 43 fixedly connected to the Y-axis cylinder 41. A first electrode 44 is arranged on the first jaw arm 42, and a second electrode 45 is arranged on the second jaw arm 43; the welding lower chord bar mechanism 6 includes a third jaw arm 61 and a fourth jaw arm 62. A third electrode 63 is arranged on the third jaw arm 61, and a fourth electrode 64 is arranged on the fourth jaw arm 62; the welding upper chord bar mechanism 5 includes a Z-axis motor 51 fixed on the gantry 7 and a welding upper chord bar positioning plate assembly 14. The lead screw nut seat of the Z-axis motor 51 is fixedly connected to a third slider 511. A positioning plate assembly, a fifth jaw arm 52, a sixth jaw arm 53 and a welding upper chord bar cylinder 56 are fixed on the third slider 511. The piston rod of the welding upper chord bar cylinder 56 is fixedly connected to the fifth jaw arm 52 and the sixth jaw arm 53. Sixth electrodes 55 are fixed on both the fifth jaw arm 52 and the sixth jaw arm 53, and a fifth electrode 15 is fixed on one side of the welding upper chord bar positioning plate assembly 14 close to the fifth jaw arm 52 and the sixth jaw arm 53.

[0026] There are two groups of the welding lower chord bar mechanisms 6. One group of the welding lower chord bar mechanisms 6 is arranged on one side of the steel bar truss 11, and the other group of the welding lower chord bar mechanisms 6 is arranged on the other side of the steel bar truss 11.

[0027] The X-axis linear module 81 includes a motor 1001, a lead screw 1002 fixedly connected to the output shaft of the motor 1001, and a nut seat 1003 sleeved on the lead screw 1002 and threadedly connected to the lead screw 1002.

[0028] The feeding mechanism 8 includes a feeding fixing plate 84 arranged on the workbench 3. The X-axis linear module 81 is arranged on the feeding fixing plate 84. The nut seat 1003 of the X-axis linear module 81 is fixedly connected to a first slider 82. A feeding jaw control cylinder 85 is fixed on the first slider 82, and the feeding jaw control cylinder 85 is fixedly connected to the feeding jaw 83 to control the opening or closing of the feeding jaw 83.

[0029] The piston rod of the Y-axis cylinder 41 is fixedly connected to the welding cross plate fixing plate 411. The welding cross plate fixing plate 411 is fixedly connected to one end of the first jaw arm 42 and the second jaw arm 43 respectively through a first rotating shaft 46 and a second rotating shaft 47. A welding cross cylinder 50 is fixedly installed at the other end of the first jaw arm 42. The piston rod of the welding cross cylinder 50 is fixedly connected to the other end of the second jaw arm 43. A first electrode mounting seat 413 is fixedly installed on the first jaw arm 42. A second electrode mounting seat 414 is fixedly installed on the second jaw arm 43. A first electrode 44 is installed on the first electrode mounting seat 413. A second electrode 45 is installed on the second electrode mounting seat 414.

[0030] The welding lower chord mechanism 6 includes a third jaw arm 61 which is fixedly connected to the workbench 3 and rotatably connected. One end of the third jaw arm 61 is fixedly connected to one end of a fourth jaw arm 62 through a third rotating shaft 65. A welding lower chord cylinder 66 is fixedly installed at the other end of the third jaw arm 61. The piston rod of the welding lower chord cylinder 66 is fixedly connected to the other end of the fourth jaw arm 62.

[0031] The piston rod of the welding upper chord cylinder 56 is fixedly connected to the welding upper chord fixing frame 57. A welding upper chord jaw control cylinder 58 and a welding upper chord guide rail 527 are fixedly installed on the welding upper chord fixing frame 57. A welding upper chord sliding block 526 is slidably connected to the welding upper chord guide rail 527. Adjustable connecting rods 528 are fixedly installed on both the left and right sides of the welding upper chord sliding block 526. The two adjustable connecting rods 528 are respectively rotatably connected to one end of a fifth jaw arm 52 and a sixth jaw arm 53. The other ends of the fifth jaw arm 52 and the sixth jaw arm 53 are rotatably connected to the welding upper chord fixing frame 57 through a fourth rotating shaft 59. The piston rod of the welding upper chord jaw control cylinder 58 is fixedly connected to the welding upper chord sliding block 526.

[0032] A welding upper chord positioning plate assembly 14 is provided on the gantry 7. The welding upper chord positioning plate assembly 14 includes a welding upper chord side plate 141 and a welding upper chord panel 142. A welding upper chord positioning guide rail 524 is fixedly installed on the welding upper chord side plate 141. A welding upper chord positioning sliding block 525 is slidably connected to the welding upper chord positioning guide rail 524. When the piston rod of the welding upper chord cylinder 56 extends, it provides guidance for the movement of the welding upper chord fixing frame 57. The welding upper chord positioning sliding block 525 is fixedly connected to one side of the welding upper chord fixing frame 57. A fifth electrode 15 is fixedly installed on one side of the welding upper chord panel 142 close to the welding upper chord fixing frame 57.

[0033] On one side of the fifth electrode 15, a copper block 521 is fixed. The copper block 521 is fixed on the movable plate 520 for welding the upper chord bars. On one side of the copper block 521, a guide pillar and bushing 522 is fixed. On one side of the guide pillar and bushing 522, a spring 523 is fixed, providing buffering and instantaneous pressing force for the pressing of the fifth electrode 15 during welding.

[0034] The discharge electrodes of the transformer 2 are electrically connected to the first electrode 44, the second electrode 45, the third electrode 63, the fourth electrode 64, the fifth electrode 15, and the sixth electrode 55 respectively.

[0035] The working principle of the steel bar truss head machine of the present invention includes the following steps:

[0036] The first step: Manually put the corresponding vertical bars and horizontal bars into the storage boxes 12 of the vertical bar storage and feeding mechanism 9 and the horizontal bar storage and feeding mechanism 10. After the machine is started, the feeding cylinder 13 of the vertical bar storage and feeding mechanism 9 pushes the vertical bars in the storage box 12 out and stands them upright beside the storage box. The motor 1001 of the X-axis linear module 81 is started, driving the lead screw 1002 to rotate, so as to drive the first slider 82 to move along the lead screw 1002 arranged along the X-axis to the position of the vertical bar through the nut seat 1003. Then the feeding gripper control cylinder 85 is started to control the feeding gripper 83 to open and clamp the vertical bar.

[0037] The second step: The feeding cylinder 13 of the horizontal bar storage and feeding mechanism 10 pushes the horizontal bars in the storage box 12 to the welding cross position of the welding cross mechanism 4. At the same time, the motor 1001 of the X-axis linear module 81 continues to rotate to drive the feeding gripper 83 to also send the vertical bar to the welding cross position of the welding cross mechanism 4. The piston rod of the Y-axis cylinder 41 is started, driving the welding cross fixing plate 411 to move forward, so as to drive the first gripper arm 42 and the second gripper arm 43 to move to the welding cross position. Then the piston rod of the welding cross cylinder 50 extends to drive the other end of the second gripper arm 43 to move towards the first gripper arm 42 around the second rotating shaft 47 as the center, so that the first gripper arm 42 and the second gripper arm 43 clamp the horizontal bar and the vertical bar. The first electrode 44 and the second electrode 45 arranged on the first gripper arm 42 and the second gripper arm 43 discharge, and after the horizontal bar and the vertical bar are discharged and welded, the first gripper arm 42 and the second gripper arm 43 are loosened and retracted to the original position.

[0038] Step 3: The motor 1001 of the X-axis linear module 81 continues to rotate, driving the feeding gripper 83 to hold the welded cross and continue to move forward. After reaching the gripper arm of the lower chord welding mechanism 6, it stops. Then, the worker puts the head of the steel bar truss 11 into the lower chord welding mechanism 6. Next, start the lower chord welding cylinder 66 in the lower chord welding mechanism 6 arranged on both sides of the steel bar truss 11. The piston rod of the lower chord welding cylinder 66 extends, driving the fourth gripper arm 62 to move towards the third gripper arm 61 with the third rotating shaft 65 as the axis, so as to clamp both ends of the lower chord of the steel bar truss 11 and the horizontal bar in the cross. Subsequently, the third electrode 63 and the fourth electrode 64 discharge, welding both ends of the horizontal bar at the bottom of the cross to the head of the lower chord of the steel bar truss 11. The gripper arms of the two groups of lower chord mechanisms 6 release after the welding is completed.

[0039] Step 4: The motor 1001 of the X-axis linear module 81 continues to rotate, driving the feeding gripper 83 to hold the welded cross and the steel bar truss 11 and continue to move forward to directly below the upper chord welding mechanism 5. Then, the feeding gripper 83 releases and returns to its original position. The Z-axis motor lead screw 51 rotates, driving the third slider 511 to move downward towards the lower part of the steel bar truss 11, thereby driving the positioning plate assembly, the upper chord welding cylinder 56, and the upper chord welding fixing frame 57 fixed on the third slider 511 to move towards the steel bar truss 11. After the fifth gripper arm 52 and the sixth gripper arm 53 fixed on the upper chord fixing frame 57 move to both sides of the upper chord of the steel bar truss 11, the piston rod of the upper chord welding gripper control cylinder 58 extends, driving the upper chord welding slider 526 to move along the upper chord welding guide rail 527. At the same time, through the adjustable connecting rod 528, it drives the electrode ends of the fifth gripper arm 52 and the sixth gripper arm 53 to rotate towards each other, so as to clamp the upper chord of the steel bar truss 11. After that, start the cylinder 56, press the vertical bar of the cross against the fifth electrode 15 on the upper chord welding panel 142. Finally, the fifth electrode 15 and the sixth electrode 55 discharge, welding the upper chord of the steel bar truss 11 and the vertical bar of the cross together by discharging. After welding, reset. Just like this, all the work of welding the end head steel bars on the steel bar truss is completed. The steel bar truss with the welded end head is taken out by the worker and packed.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0041] Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the claims.

Claims

1. A steel bar truss head machine, characterized in that, It includes a frame (1), a transformer (2) arranged under the frame (1), and a workbench (3) arranged on the frame (1). A cross-welding mechanism (4), an upper chord bar welding mechanism (5), a lower chord bar welding mechanism (6), a gantry (7), a feeding mechanism (8), a vertical bar storage and pushing mechanism (9), a horizontal bar storage and pushing mechanism (10), and a steel bar truss (11) are provided on the workbench (3). Both the vertical bar storage and pushing mechanism (9) and the horizontal bar storage and pushing mechanism (10) include a storage box (12) and a pushing cylinder (13). The pushing cylinder (13) pushes out the steel bars in the storage box (12) to supply materials for the cross-welding mechanism (4). The feeding mechanism (8) includes an X-axis linear module (81) and a feeding jaw (83) fixedly connected to the first slider (82) of the X-axis linear module (81). The cross-welding mechanism (4) includes a Y-axis cylinder (41), a first jaw arm (42) and a second jaw arm (43) fixedly connected to the Y-axis cylinder (41). A first electrode (44) is provided on the first jaw arm (42), and a second electrode (45) is provided on the second jaw arm (43). The lower chord bar welding mechanism (6) includes a third jaw arm (61) and a fourth jaw arm (62). A third electrode (63) is provided on the third jaw arm (61), and a fourth electrode (64) is provided on the fourth jaw arm (62). The upper chord bar welding mechanism (5) includes a Z-axis motor (51) fixed on the gantry (7) and an upper chord bar welding positioning plate assembly (14). The screw nut seat of the Z-axis motor (51) is fixedly connected to a third slider (511). A fifth jaw arm (52), a sixth jaw arm (53), and an upper chord bar welding cylinder (56) are fixed on the third slider (511). The piston rod of the upper chord bar welding cylinder (56) is fixedly connected to the fifth jaw arm (52) and the sixth jaw arm (53). Sixth electrodes (55) are fixed on both the fifth jaw arm (52) and the sixth jaw arm (53). A fifth electrode (15) is fixed on one side of the upper chord bar welding positioning plate assembly (14) close to the fifth jaw arm (52) and the sixth jaw arm (53). The X-axis linear module (81) includes a motor (1001), a screw rod (1002) fixedly connected to the output shaft of the motor (1001), and a nut seat (1003) sleeved on the screw rod (1002) and threadedly connected to the screw rod (1002). The feeding mechanism (8) includes a feeding fixed plate (84) arranged on the workbench (3). The X-axis linear module (81) is provided on the feeding fixed plate (84). The nut seat (1003) of the X-axis linear module (81) is fixedly connected to a first slider (82). A feeding jaw control cylinder (85) is fixed on the first slider (82). The feeding jaw control cylinder (85) is fixedly connected to the feeding jaw (83) to control the opening or closing of the feeding jaw (83). The piston rod of the Y-axis cylinder (41) is fixedly connected to the welding cross plate fixing plate (411). The welding cross plate fixing plate (411) is fixedly connected to one end of the first jaw arm (42) and the second jaw arm (43) respectively through the first rotating shaft (46) and the second rotating shaft (47). A welding cross cylinder (50) is fixed to the other end of the first jaw arm (42). The piston rod of the welding cross cylinder (50) is fixedly connected to the other end of the second jaw arm (43). A first electrode mounting seat (413) is fixed on the first jaw arm (42). A second electrode mounting seat (414) is fixed on the second jaw arm (43). A first electrode (44) is mounted on the first electrode mounting seat (413). A second electrode (45) is mounted on the second electrode mounting seat (414). The lower chord welding mechanism (6) includes a third jaw arm (61) fixed to the workbench (3). One end of the third jaw arm (61) is fixedly connected to one end of the fourth jaw arm (62) through a third rotating shaft (65). A lower chord welding cylinder (66) is fixed to the other end of the third jaw arm (61). The piston rod of the lower chord welding cylinder (66) is fixedly connected to the other end of the fourth jaw arm (62). The piston rod of the upper chord welding cylinder (56) is fixedly connected to the upper chord welding fixing frame (57). A upper chord welding jaw control cylinder (58) and an upper chord welding guide rail (527) are fixed on the upper chord welding fixing frame (57). An upper chord welding slider (526) is slidably connected to the upper chord welding guide rail (527). Adjustable connecting rods (528) are fixed to both the left and right sides of the upper chord welding slider (526). The two adjustable connecting rods (528) are respectively rotatably connected to one end of the fifth jaw arm (52) and the sixth jaw arm (53). The other ends of the fifth jaw arm (52) and the sixth jaw arm (53) are rotatably connected to the upper chord welding fixing frame (57) through a fourth rotating shaft (59). The piston rod of the upper chord welding jaw control cylinder (58) is fixedly connected to the upper chord welding slider (526). A upper chord welding positioning plate assembly (14) is provided on the gantry (7). The upper chord welding positioning plate assembly (14) includes an upper chord welding side plate (141) and an upper chord welding panel (142). An upper chord welding positioning guide rail (524) is fixed on the upper chord welding side plate (141). An upper chord welding positioning slider (525) is slidably connected to the upper chord welding positioning guide rail (524). The upper chord welding positioning slider (525) is fixedly connected to one side of the upper chord welding fixing frame (57). A fifth electrode (15) is fixed on the side of the upper chord welding panel (142) close to the upper chord welding fixing frame (57). A copper block (521) is fixed on one side of the fifth electrode (15). The copper block (521) is fixed on the upper chord welding movable plate (520). A guide pillar and bushing (522) is fixed on one side of the copper block (521). A spring (523) is fixed on one side of the guide pillar and bushing (522).

2. The steel bar truss end capping machine according to claim 1, wherein, There are two groups of the welding lower chord bar mechanisms (6). One group of the welding lower chord bar mechanisms (6) is arranged on one side of the steel bar truss (11), and the other group of the welding lower chord bar mechanisms (6) is arranged on the other side of the steel bar truss (11).

3. The steel bar truss head sealing machine according to claim 2, characterized in that, The discharge electrodes of the transformer (2) are electrically connected to the first electrode (44), the second electrode (45), the third electrode (63), the fourth electrode (64), the fifth electrode (15), and the sixth electrode (55) respectively.

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