Gantry welding apparatus and welding method

Abstract

The application relates to a gantry welding device and a welding method, and relates to the technical field of welding.The gantry welding device comprises a workbench and a gantry fixedly connected above the workbench, a welding device for welding a burglar window is slidably connected to the gantry, a fixing device for fixing the burglar window is slidably connected to the gantry, the workbench below the gantry is a welding area for welding workpieces, the fixing device and the welding device can extend into the welding area, the welding device comprises a first welding piece, the first welding piece comprises a first welding arm slidably connected to the inner side wall of the gantry and a first welding part, two welding guns are horizontally slidably connected to the first welding part, the interval between the first welding arm and the first welding part is equal to the interval between two adjacent square tube railings, the steps are simple, the welding efficiency is relatively high, and multiple welding positions of the square tube railing can be simultaneously welded.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a gantry welding device and welding method. Background Technology

[0002] Welding is a common method of joining metals. It involves heating two or more metal workpieces to a molten state using a heat source, allowing them to bond together in their molten state. After cooling, the bond is relatively strong. Welding is widely used in the manufacture and repair of metal structures, equipment, and components. It has advantages such as high efficiency and speed, the ability to join different metals, and a wide range of applications.

[0003] Gantry welding machines are typically used for welding larger workpieces or structures, especially those that are large in size, heavy in weight, and require high-precision welding. Depending on the user's needs, they can also be used to weld security windows, etc.

[0004] Security windows typically consist of a window frame and several square tubular railings inserted into the frame. Before welding the security windows, to improve the convenience of subsequent welding, the square tubular railings are usually inserted into the window frame for preliminary installation. Then, the intersections of the security windows are welded, usually using a robotic arm to weld one plane at the intersection. Because the robotic arm's rotation angle is insufficient, after welding one plane of the security window, it is usually necessary to rotate the window and then use the robotic arm to weld the entire circle of intersections again. This process is cumbersome and inefficient. Summary of the Invention

[0005] To improve welding efficiency, this application provides a gantry welding device and a welding method.

[0006] In a first aspect, this application provides a gantry welding device, which adopts the following technical solution:

[0007] A gantry welding device includes a workbench and a gantry frame fixedly connected above the workbench. Welding equipment for welding security windows is slidably connected to the gantry frame, and fixing equipment for fixing the security windows is also slidably connected to the gantry frame. The workbench below the gantry frame is set as a welding area for welding workpieces. Both the fixing equipment and the welding equipment can extend into the welding area. The welding equipment includes a first welding component, which includes a first welding arm and a first welding part slidably connected to the inner wall of the gantry frame. Two welding torches are horizontally slidably connected to the first welding part, and the two welding torches are arranged opposite each other on the first welding part. The first welding part and the first welding arm are at the same height and are arranged opposite each other. The distance between the first welding arm and the first welding part is equal to the distance between two adjacent square tube railings. The gantry frame is provided with a first driving mechanism for driving the first welding component to move.

[0008] By adopting the above technical solution, the user first places the connected security window in the welding area, then uses the fixing equipment to fix the security window inside the gantry frame, then manipulates the first welding arm to extend, thereby moving the first welding arm closer to the welding point, and at the same time manipulates the first welding part to move closer to the welding point, so that the welding gun on the first welding part is in contact with the welding point, and then the welding gun can be manipulated to weld, welding along the length or width of the square tube railing. After welding is completed, the first welding arm and the first welding part can be restored, and then the first drive mechanism can be manipulated to move the first welding part. The steps are simple, the welding efficiency is high, and multiple welding points of the square tube railing can be welded at the same time.

[0009] Optionally, the first welding arm is slidably connected to the upper end of the gantry frame. The end of the first welding arm away from the gantry frame is provided with a welding ring. The shape of the welding ring is the same as that of the square tube railing, and the size of the welding ring is larger than that of the square tube railing. Two welding guns are slidably connected on the welding ring. The two welding guns are arranged opposite to each other on the inner wall of the welding ring. The welding ring includes a left half ring and a right half ring, and the left half ring and the right half ring are detachably connected.

[0010] By adopting the above technical solution, after manipulating the first welding arm to move to a position close to the square tube railing, the left and right half rings are opened, and then the welding ring is placed over the square tube railing. Then, the welding guns are moved to the position where they meet at the intersection of the square tube railing and the window frame. Then, the two welding guns are slid to complete the welding of the opposite sides of the square tube railing. By using the cooperation of the first welding arm to weld, the welding of all surfaces of the square tube railing can be completed. The required steps are relatively simple and the welding efficiency is high.

[0011] Optionally, one side wall of the gantry frame is designated as a first side wall, and the first driving mechanism includes a first threaded rod that is horizontally rotatably connected to the first side wall. The first side wall has a first limiting opening, and a first welding arm is threadedly connected to the first threaded rod and located within the first limiting opening. The opposite side of the first side wall is designated as a second side wall, and the first driving mechanism includes a second threaded rod that is horizontally rotatably connected to the second side wall. The second side wall has a second limiting opening, and a first welding part is threadedly connected to the second threaded rod and located within the second limiting opening.

[0012] By adopting the above technical solution, the user can drive the first welding arm to move along the length direction of the gantry side wall by rotating the first threaded rod. The structure is simple and easy to operate. The user can drive the second welding arm to move along the length direction of the gantry side wall by rotating the second threaded rod. The structure is simple and easy to operate.

[0013] Optionally, the first drive mechanism includes a plurality of drive motors, one of which is fixedly connected to the first threaded rod, and the other drive motor is fixedly connected to the second threaded rod.

[0014] By adopting the above technical solution, the user operates the drive motor to rotate, which in turn drives the first threaded rod to rotate. As the first gear drives the driven wheel to rotate, it drives the second threaded rod to rotate in the opposite direction to the first threaded rod, which in turn drives the first welding arm and the first welding part to move in the same direction. The structure is simple and the drive is convenient.

[0015] Optionally, the welding equipment includes a second welding component, which has the same structure as the first welding component. The second welding component is located at the lower end of the gantry frame, and the lower end of the gantry frame is provided with a second driving mechanism for driving the second welding component. The second driving mechanism has the same structure as the first driving mechanism.

[0016] By adopting the above technical solution, since both the top and bottom ends of the security window need to be welded, multiple welding devices can be set up to weld the square tube railings simultaneously, thereby improving the welding efficiency.

[0017] Optionally, the fixing device includes an upper push plate slidably connected to the top wall of the gantry frame. When the upper push plate slides out, the side of the upper push plate near the window frame abuts against the window frame. The fixing device also includes two lower push plates slidably connected to the side wall of the gantry frame. The two lower push plates are arranged opposite each other. When the two lower push plates slide out, the side of the two lower push plates near the window frame abuts against the side wall of the window frame.

[0018] By adopting the above technical solution, when fixing the burglarproof window, first place the window frame in the welding area, then operate the two push plates to slide out, and then make both push plates abut against the side wall of the window frame, thereby clamping the lower end of the window frame in the welding area. Then, the user operates the push plate to move to the upper end of the burglarproof window, thereby pressing and fixing the burglarproof window in the welding area, and then the burglarproof window can be welded, thereby improving the quality of welding.

[0019] Optionally, the fixing device includes two upper abutment plates slidably connected to the side wall of the gantry frame. Both upper abutment plates are located below the first welding arm and are arranged opposite each other. Each upper abutment plate has an abutment sponge on its side closest to each other. The abutment sponge includes an inner layer sponge and a heat-resistant sponge, with the heat-resistant sponge located outside the inner layer sponge. The fixing device also includes two lower abutment plates slidably connected to the side wall of the gantry frame. Both lower abutment plates are arranged opposite each other and are located above the second welding component. The structure of the two lower abutment plates is the same as that of the upper abutment plates.

[0020] By adopting the above technical solution, the user manipulates the welding ring to fit over the square tube railing, manipulates the two welding guns on the first welding part to abut against the points to be welded on the square tube railing, then manipulates the two upper abutment plates to press against the upper ends of several square tube railings, and then manipulates the two lower abutment plates to press against the lower ends of several square tube railings, thereby improving the stability of the square tube railing, reducing the occurrence of shaking of the square tube railing during welding, and thus improving the welding quality of the security window.

[0021] Secondly, this application provides a welding method, comprising the following steps:

[0022] S1: Extend the opposite push plate to clamp the lower end of the window frame, and then extend the upper push plate to press the upper end of the window frame against it.

[0023] S2: Manipulate the first welding arm to move the welding ring to the intersection of the window frame and the square tube railing, put the welding ring over the square tube railing, and align the welding torch with the position to be welded on the security window; manipulate the first welding part to move the welding torch to the position to be welded on the security window.

[0024] S4: Move the two upper abutments to below the first welding arm, then extend the two upper abutments to press against the upper pipe railing; move the two lower bottom plates to above the lower first welding arm, then extend the two lower abutments to press against the lower pipe railing.

[0025] S5: Use a welding torch to weld the intersection of the square tube railing and the window frame;

[0026] S6: Welding is completed. The welding torches are restored, and then the drive motor is rotated to move the first welding arm and the first welding part to the next square tube railing position to weld the square tube railing and the window frame.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The user first places the connected security window in the welding area, then uses the fixing equipment to fix the security window inside the gantry frame. Then, the user manipulates the first welding arm to extend, thereby moving the first welding arm closer to the welding point. At the same time, the user manipulates the first welding part to move closer to the welding point, so that the welding gun on the first welding part is in contact with the welding point. Then, the user can manipulate the welding gun to weld along the length or width of the square tube railing. After the welding is completed, the user can manipulate the first welding arm and the first welding part to return to their original positions. Then, the user can manipulate the first drive mechanism to move the first welded part. The steps are simple and the welding efficiency is high. Multiple welding points of the square tube railing can be welded at the same time.

[0029] 2. After manipulating the first welding arm to move it close to the square tube railing, manipulate the left and right half rings to open, then put the welding ring on the outside of the square tube railing. Then move the welding guns to the position where they meet the intersection of the square tube railing and the window frame. Then manipulate the two welding guns to slide, thereby completing the welding of the opposite sides of the square tube railing. By using the cooperation of the first welding arm and the first welding part, the welding of all surfaces of the square tube railing can be completed. The required steps are relatively simple and the welding efficiency is high. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a gantry welding device according to this application.

[0031] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0032] Figure 3 This is a schematic diagram of the overall structure of a gantry welding machine from another angle.

[0033] Figure 4 yes Figure 3 Enlarged diagram of part B.

[0034] Explanation of reference numerals in the attached drawings: 100, window frame; 200, square tube railing; 1, workbench; 2, gantry frame; 3, welding equipment; 31, first welded component; 311, first welding arm; 3111, fifth cylinder; 3112, welding ring; 3113, left half ring; 3114, right half ring; 312, first welding section; 313, third cylinder; 314, fourth cylinder; 32, second welded component; 4, fixing equipment; 41, upper push plate; 4 11. Second cylinder; 42. Lower push plate; 421. First cylinder; 43. Upper abutment plate; 44. Lower abutment plate; 5. Welding area; 6. Welding torch; 7. First drive mechanism; 71. Drive motor; 72. First threaded rod; 73. Second threaded rod; 74. First limiting port; 75. Second limiting port; 8. Second drive mechanism; 9. Bidirectional cylinder; 91. Sixth cylinder; 92. Seventh cylinder; 93. First side wall; 94. Second side wall. Detailed Implementation

[0035] The present application will be further described in detail below with reference to all the accompanying drawings.

[0036] This application discloses a gantry welding device.

[0037] Reference Figure 1A gantry welding machine includes a workbench 1 and a gantry frame 2 fixedly connected above the workbench 1. The workbench 1 below the gantry frame 2 is set as a welding area 5 for welding workpieces. A fixing device 4 for fixing a burglarproof window is slidably connected to the gantry frame 2. The user first places the installed burglarproof window in the welding area 5. The fixing device 4 can extend into the welding area 5. Then, the user uses the fixing device 4 to fix the burglarproof window in the welding area 5. A welding device 3 for welding the burglarproof window is slidably connected to the gantry frame 2. The welding device 3 can also extend into the welding area 5. The user uses the welding device 3 to weld the points of the burglarproof window to be welded.

[0038] Reference Figure 1 The user first connects the window frame 100 of the security window to the square tube railing 200, and then moves the connected security window into the welding area 5. The fixing device 4 includes two push plates 42 that are slidably connected to the side wall of the gantry frame 2. The two push plates 42 are arranged opposite each other. On the side of the push plates 42 that are far apart from each other, there are several first cylinders 421. The piston rod of the first cylinder 421 is fixedly connected to the corresponding push plate 42. The other end of the first cylinder 421 is fixedly connected to the lower end side wall of the gantry frame 2. The user manipulates the piston rod of several first cylinders 421 to extend. A synchronizer is provided between several first cylinders 421 on the same side. The user manipulates several first cylinders 421 to extend, thereby driving the push plates 42 to move closer to the window frame 100. After moving to the position where they abut against the window frame 100, the push plates 42 clamp the lower end of the window frame 100, thereby completing the fixing of the lower end of the window frame 100.

[0039] Reference Figure 1 The fixing device 4 includes an upper push plate 41 slidably connected to the top wall of the gantry frame 2. A second cylinder 411 is vertically downward on the top wall of the gantry frame 2. The side of the upper push plate 41 away from the anti-theft window is fixedly connected to the piston rod of the second cylinder 411. The user operates the piston rod of the second cylinder 411 to extend, thereby moving the upper push plate 41 to abut against the upper end of the window frame 100. The upper push plate 41 then presses the upper end of the window frame 100 against the workbench 1, thereby pressing the window frame 100 against the workbench 1. Then the user can operate the welding device 3 to weld the protective window.

[0040] Reference Figure 1 and Figure 2The welding equipment 3 includes a first welding component 31, which includes a first welding arm 311 and a first welding part 312 slidably connected to the inner wall of the gantry frame 2. The first welding arm 311 and the first welding part 312 are arranged opposite to each other inside the gantry frame 2. The first welding part 312 includes a third cylinder 313. One side wall of the gantry frame 2 is designated as a first side wall 93. The third cylinder 313 is horizontally slidably connected to a second side wall 94. The piston rod of the third cylinder 313 is provided with a welding table for welding the square tube railing 200. Two fourth cylinders 314 are provided on the side of the welding table near the third cylinder 313. The fourth cylinders 314 and the third cylinder 313 are arranged parallel to each other. Each piston rod of the fourth cylinder 314 is provided with a welding torch 6. The distance between the two welding torches 6 is adapted to the width of the square tube railing 200. The gantry frame 2 is provided with a first driving mechanism 7 for driving the first welding component 31 to move.

[0041] Reference Figure 3 and Figure 4 The first welding arm 311 is slidably connected to the upper end of the gantry frame 2. The end of the first welding arm 311 away from the gantry frame 2 is provided with a welding ring 3112. The shape of the welding ring 3112 is the same as that of the square tube railing 200. The size of the welding ring 3112 is larger than that of the square tube railing 200. Two welding torches 6 are slidably connected to the welding ring 3112. The two welding torches 6 are slidably connected to the inner wall of the welding ring 3112. The welding ring 3112 includes a left half ring 3113 and a right half ring 3114. The left half ring 3113 and the right half ring 3114 are detachably connected.

[0042] The first welding arm 311 includes a fifth cylinder 3111. A bidirectional cylinder 9 is provided at the piston rod of the fifth cylinder 3111. One piston rod of the bidirectional cylinder 9 is fixedly connected to the left half ring 3113, and the other piston rod of the bidirectional cylinder 9 is fixedly connected to the right half ring 3114.

[0043] Reference Figure 3 and Figure 4 The user operates the piston rods of the third cylinder 313 and the fifth cylinder 3111 to extend simultaneously, moving the nozzles of the welding torches 6 on the welding table to abut against the square tube railing 200. The left half ring 3113 is equipped with the sixth cylinder 91, and the right half ring 3114 is equipped with the seventh cylinder 92. The piston rods of the sixth cylinder 91 and the seventh cylinder 92 are both equipped with welding torches 6. The welding ring 3112 is moved outside the square tube railing 200, and then the user operates the piston rod of the bidirectional cylinder 9 to retract, thereby closing the welding ring 3112 and abutting the nozzles of the welding torches 6 on the welding ring 3112 against the square tube railing 200.

[0044] Reference Figure 3 and Figure 4The fixed device 4 includes two upper abutment plates 43 slidably connected to the side wall of the gantry frame 2. Both upper abutment plates 43 are located below the first welding arm 311. The two upper abutment plates 43 are arranged opposite each other. The sides of the two upper abutment plates 43 that are close to each other are provided with abutment sponge. The abutment sponge includes an inner layer sponge and a heat-resistant sponge. The heat-resistant sponge is located on the outside of the inner layer sponge. The user manipulates the upper abutment plate 43 to move it to the position where it abuts against the square tube railing 200, and then presses the square tube railing 200 against the welding area 5, thereby improving the effect of subsequent welding and reducing the vibration caused by the welding torch 6 welding the square tube railing 200.

[0045] Reference Figure 3 and Figure 4 Then the user manipulates the piston rods of the sixth cylinder 91 and the seventh cylinder 92 to extend, and manipulates the piston rods of the two fourth cylinders 314 to extend, thereby driving the welding torch 6 to move, and then welding the square tube railing 200.

[0046] Reference Figure 3 and Figure 4 The welding equipment 3 includes a second welding component 32, which has the same structure as the first welding component 31. The second welding component 32 is located at the lower end of the gantry frame 2. While the first welding component 31 is welding the square tube railing 200, the second welding component 32 is welding the part to be welded at the lower end of the square tube railing 200, thereby improving the welding efficiency of the square tube railing 200. The fixing equipment 4 includes two lower abutment plates 44 that are slidably connected to the side wall of the gantry frame 2. The two lower abutment plates 44 are arranged opposite each other and are located above the second welding component 32. The structure of the two lower abutment plates 44 is the same as that of the upper abutment plate 43, thereby improving the effect of subsequent welding and reducing the vibration caused by the welding torch 6 welding the square tube railing 200.

[0047] After welding is completed, the user manipulates the first welded part 31 and the second welded part 32 to restore them.

[0048] Reference Figure 1The first drive mechanism 7 includes a first threaded rod 72, which is horizontally rotatably connected to a first side wall 93. The first side wall 93 has a first limiting opening 74. A first welding arm 311 is threadedly connected to the first threaded rod 72. The end of the first welding arm 311 away from the burglar window is located inside the first limiting opening 74. The opposite side of the first side wall 93 is a second side wall 94. The first drive mechanism 7 includes a second threaded rod 73, which is horizontally rotatably connected to the second side wall 94. The second side wall 94 has a second limiting opening 75. A first welding part 312 is threadedly connected to the second threaded rod 73. The end of the first welding part away from the burglar window is located inside the second limiting opening 75. The first drive mechanism 7 includes two drive motors 71, both of which are fixedly connected to the gantry frame. The output shaft of one drive motor 71 is fixedly connected to the first threaded rod 72, and the output shaft of the other drive motor 71 is fixedly connected to the second threaded rod 73.

[0049] Reference Figure 1 The user operates the drive motor 71 to rotate, which in turn drives the first threaded rod 72 and the second threaded rod 73 to rotate, thereby moving the first welded part 31 along the length of the window frame 100. The first welding arm 311 and the first welding part 312 are moved to the next square tube railing 200. The distance between the first welding arm 311 and the first welding part 312 is equal to the distance between the two adjacent square tube railings 200. The first welding arm 311 welds the two unwelded parts of the square tube railing 200 that are not yet welded by the first welding part 312. The first welding arm 311 then welds the next square tube railing 200, thereby improving the welding efficiency of the square tube railing 200.

[0050] Reference Figure 1 The lower end of the gantry frame 2 is provided with a second drive mechanism 8 for driving the second welded part 32. The second drive mechanism 8 has the same structure as the first drive mechanism 7. When the user manipulates the first welded part 31 to move, he can manipulate the second drive mechanism 8 to drive the second welded part 32 to move, thereby improving the welding efficiency of the square tube railing 200.

[0051] Then the user repeats the above steps to complete the welding of all the parts to be welded on the square pipe railing 200, which is highly efficient.

[0052] The implementation principle of a gantry welding device according to an embodiment of this application is as follows: First, the fixing mechanism is operated to clamp the anti-theft window in the welding area 5. Then, the welding guns 6 on the first welding component 31 and the second welding component 32 are moved to the position where they abut against the square tube railing 200 to be welded. Then, the welding guns 6 are operated to move and weld the square tube railing 200. After the welding is completed, the user operates the first welding component 31 and the second welding component 32 to be restored. Then, the drive motor 71 is operated to rotate and drive the first welding component 31 and the second welding component 32 to move along the length of the anti-theft window to the next square tube railing 200. The first welding arm 311 welds the two unwelded parts of the square tube railing 200 that were not welded by the first welding part 312. The first welding arm 311 welds the next square tube railing 200, thereby improving the welding efficiency of the square tube railing 200.

[0053] This application also discloses a welding method.

[0054] A welding method comprising the following steps:

[0055] S1: The downward push plate 42 is extended by manipulating it to clamp the lower end of the window frame 100, and then the upward push plate 41 is extended to press the upper end of the window frame 100 against it.

[0056] S2: Manipulate the first welding arm 311 to move the welding ring 3112 to the intersection of the window frame 100 and the square tube railing 200, put the welding ring 3112 on the outside of the square tube railing 200, and align the welding gun 6 with the position to be welded on the burglarproof window; manipulate the first welding part 312 to move the welding gun 6 to the position to be welded on the burglarproof window.

[0057] S4: Manipulate the two upper abutment plates 43 to move below the first welding arm 311, then manipulate the two upper abutment plates 43 to extend and press against the upper pipe railing 200; manipulate the two lower abutment plates 44 to move above the lower first welding arm 311, then manipulate the two lower abutment plates 44 to extend and press against the lower pipe railing 200.

[0058] S5: Using welding torch 6, weld at the intersection of square tube railing 200 and window frame 100;

[0059] S6: Welding is completed. The welding guns 6 are restored. Then the drive motor 71 is rotated, which in turn drives the first welding arm 311 and the first welding part 312 to move to the next square tube railing 200 position to weld the square tube railing 200 and the window frame 100.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gantry welding machine, comprising a workbench (1) and a gantry frame (2) fixedly connected above the workbench (1), characterized in that: A welding device (3) for welding security windows is slidably connected to the gantry frame (2), and a fixing device (4) for fixing the security windows is slidably connected to the gantry frame (2). The workbench (1) below the gantry frame (2) is set as a welding area (5) for welding workpieces. Both the fixing device (4) and the welding device (3) can extend into the welding area (5). The welding device (3) includes a first welding component (31), which includes a first welding arm (311) and a first welding part (312) slidably connected to the inner wall of the gantry frame (2). The first welding part (312) is horizontally slidably connected to two welding guns (6). The two welding guns (6) are arranged opposite to each other on the first welding part (312). The first welding part (312) and the first welding arm (311) are at the same height. The first welding arm (311) and the first welding part (312) are arranged opposite to each other. The distance between the first welding arm (311) and the first welding part (312) is equal to the distance between two adjacent square tube railings (200). The gantry frame (2) is provided with a first driving mechanism (7) for driving the first welded part (31) to move. The first welding arm (311) is slidably connected to the upper end of the gantry frame (2). The end of the first welding arm (311) away from the gantry frame (2) is provided with a welding ring (3112). The shape of the welding ring (3112) is the same as that of the square tube railing (200). The size of the welding ring (3112) is larger than that of the square tube railing (200). Two welding torches (6) are slidably connected on the welding ring (3112). The two welding torches (6) are arranged opposite to each other on the inner wall of the welding ring (3112). The welding ring (3112) includes a left half ring (3113) and a right half ring (3114). The left half ring (3113) and the right half ring (3114) are detachably connected. The first welding arm (311) includes a fifth cylinder (3111). A bidirectional cylinder (9) is provided at the piston rod of the fifth cylinder (3111). One piston rod of the bidirectional cylinder (9) is fixedly connected to the left half ring (3113), and the other piston rod of the bidirectional cylinder (9) is fixedly connected to the right half ring (3114). A sixth cylinder (91) is provided on the left half ring (3113), and a seventh cylinder (92) is provided on the right half ring (3114). The welding torch (6) is provided at the piston rod of both the sixth cylinder (91) and the seventh cylinder (92). The welding equipment (3) includes a second welding component (32), which has the same structure as the first welding component (31). The second welding component (32) is located at the lower end of the gantry (2). The lower end of the gantry (2) is provided with a second driving mechanism (8) for driving the second welding component (32), which has the same structure as the first driving mechanism (7).

2. The gantry welding equipment according to claim 1, characterized in that: One side wall of the gantry (2) is designated as a first side wall (93). The first drive mechanism (7) includes a first threaded rod (72), which is horizontally rotatably connected to the first side wall (93). The first side wall (93) has a first limiting opening (74). The first welding arm (311) is threadedly connected to the first threaded rod (72) and is located inside the first limiting opening (74). The opposite side of the first side wall (93) is designated as a second side wall (94). The first drive mechanism (7) includes a second threaded rod (73) which is horizontally rotatably connected to the second side wall (94). The second side wall (94) has a second limiting opening (75). The first welding part (312) is threadedly connected to the second threaded rod (73) and is located inside the second limiting opening (75).

3. The gantry welding equipment according to claim 2, characterized in that: The first drive mechanism (7) includes two drive motors (71), the output shaft of one drive motor (71) is fixedly connected to the first threaded rod (72), and the output shaft of the other drive motor (71) is fixedly connected to the second threaded rod (73).

4. The gantry welding equipment according to claim 3, characterized in that: The fixing device (4) includes an upper push plate (41) slidably connected to the top wall of the gantry frame (2). When the upper push plate (41) slides out, the side of the upper push plate (41) near the window frame (100) abuts against the window frame (100). The fixing device (4) also includes two lower push plates (42) slidably connected to the side wall of the gantry frame (2). The two lower push plates (42) are arranged opposite each other. When the two lower push plates (42) slide out, the side of the two lower push plates (42) near the window frame (100) abuts against the side wall of the window frame (100).

5. The gantry welding equipment according to claim 4, characterized in that: The fixing device (4) includes two upper abutment plates (43) slidably connected to the side wall of the gantry frame (2). Both upper abutment plates (43) are located below the first welding arm (311). The two upper abutment plates (43) are arranged opposite each other. The side of the two upper abutment plates (43) that are close to each other is provided with abutment sponge. The abutment sponge includes an inner layer sponge and a heat-resistant sponge. The heat-resistant sponge is located outside the inner layer sponge. The fixing device (4) includes two lower abutment plates (44) slidably connected to the side wall of the gantry frame (2). The two lower abutment plates (44) are arranged opposite each other. The two lower abutment plates (44) are located above the second welding part (32). The structure of the two lower abutment plates (44) is the same as that of the upper abutment plates (43).

6. A welding method applied to a gantry welding equipment as described in claim 5, comprising the following steps: S1: Operate the opposite push plate (42) to extend and clamp the lower end of the window frame (100), and then operate the push plate (41) to extend and press the upper end of the window frame (100) against it. S2: Manipulate the first welding arm (311) to move the welding ring (3112) to the intersection of the window frame (100) and the square tube railing (200), put the welding ring (3112) over the square tube railing (200), and align the welding gun (6) with the position to be welded on the burglar window. S3: Manipulate the first welding part (312) to move the welding gun (6) to the position to be welded to the security window; S4: Manipulate the two upper abutments (43) to move below the upper first welding arm (311), then manipulate the two upper abutments (43) to extend and press against the upper pipe rail (200), manipulate the two lower abutments (44) to move above the lower first welding arm (311), then manipulate the two lower abutments (44) to extend and press against the lower pipe rail (200); S5: Using a welding torch (6), weld the intersection of the square tube railing (200) and the window frame (100); S6: Welding is completed. The welding guns (6) are restored, and the drive motor (71) is rotated to drive the first welding arm (311) and the first welding part (312) to move to the next square tube railing (200) position to weld the square tube railing (200) and the window frame (100).

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