H-shaped steel beam side flange plate welding device

Abstract

The invention relates to the technical field of steel beam welding, in particular to an H-shaped steel beam side flange plate welding device which comprises a base and two frames located on the upper side of the base, electric lifting rods are fixedly connected between the bottom ends of the two frames and the base, an air pump is arranged at one end of each frame, and an air outlet is formed in the other end of each frame. Electric push rods are arranged at the opposite ends of the two frames, and H-shaped steel is arranged between the two frames. According to the H-shaped steel beam side flange plate welding device, through the arrangement of the grinding beads, when the position of the first sliding frame is automatically adjusted, friction generated between the first sliding frame and H-shaped steel can be reduced, the H-shaped steel is prevented from being damaged, after positioning, the grinding beads can avoid a welding head on the basis of keeping the original length, influences on welding are prevented, and the welding quality is improved. And when the first threaded block moves, the polishing beads achieve the polishing effect, and the rotating direction of the polishing beads is opposite to the moving direction of the first threaded block, so that the polishing effect can be further improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel beam welding, in particular to a side flange plate welding device for an H-shaped steel beam. Background Art

[0002] The basic principle of H-beam welding is to use an electric arc or other heat source to heat the cross section or end of the H-beam to a molten state, and then connect them to each other under pressure or without pressure to form a whole. After each welding, the flange plate needs to be turned over again and then welded again, which is time-consuming and labor-intensive.

[0003] The invention with publication number CN116713656A has four sets of slot plates, flange plates and web plates moving synchronously, and cooperating with external welding heads to achieve one-time welding of the four joints between the flange plate and the web plate, eliminating the need for positioning welds, flange plate flipping and secondary positioning, and avoiding flipping deformation.

[0004] The above patent requires that steel be installed from one end of the track and then welded by moving the steel on the track. However, this welding method requires an excessively large and long space during movement, which in turn increases the area required for factory production and increases production costs. In addition, after welding, an additional grinding structure is required to grind and polish the welds, and the steps are cumbersome. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides an H-shaped steel beam side flange plate welding device.

[0006] The present invention adopts the following technical solution: an H-shaped steel beam side flange plate welding device, comprising a base and a frame located on the upper side of the base, wherein two frames are symmetrically provided, and an electric lifting rod is fixedly connected between the bottom ends of the two frames and the base, an air pump is provided at one end of the frame, and electric push rods are provided at the opposite ends of the two frames, and an H-shaped steel is provided between the two frames, and further comprising:

[0007] An automatic positioning mechanism capable of automatically positioning the area to be welded, wherein the automatic positioning mechanism is provided on the frame;

[0008] An avoidance mechanism, capable of enabling the automatic positioning mechanism to avoid the welding assembly after positioning, wherein the avoidance mechanism is arranged in the automatic positioning mechanism;

[0009] And a grinding mechanism, which can automatically grind the welding position, and the grinding mechanism is arranged in the automatic positioning mechanism.

[0010] As a further description of the above technical solution: the automatic positioning mechanism includes a cavity opened on the upper and lower opposite sides of the frame, and plug plates are inserted in the upper and lower parts of the cavity. Slide plates are provided at the opposite ends of the upper and lower plug plates for horizontal sliding. The end of the slide plate away from the H-shaped steel is fixedly connected to the protruding end of the electric push rod. One end of the slide plate extends outside the frame, and the end of the slide plate extending outside the frame is fixedly connected to an extension frame, and the extension frame is arranged close to another frame. Threaded block 1 and threaded block 2 are slidably provided in the extension frame, and a threaded rod is threadedly connected in the threaded block 1 and the threaded block 2. The threaded rod is rotatably provided in the extension frame, and one end of the threaded rod is fixedly connected to a motor, and the motor is fixed to the outer wall of one end of the extension frame. The upper end of the threaded block 2 is slidably provided The end of the magnetic frame is fixedly connected to a spring 1 between one end of the magnetic frame and the slide 2, and the magnetic strip is fixedly connected to the threaded block 2.

[0011] As a further description of the above technical solution: the avoidance mechanism includes a squeeze column 1 fixedly connected to the threaded block 1, and the squeeze column 1 is arranged away from the H-shaped steel. The threaded block 1 and the threaded block 2 are both provided with slots. The extension frame is provided with a squeeze column 2 at one end close to the motor, and a magnetic block is provided at one end of the threaded block 1 away from the H-shaped steel. A slider is fixedly connected to the slide frame 1, a sliding sleeve is provided on the outer side of the slider, and a spring 4 is fixedly connected between the slider and the sliding sleeve.

[0012] As a further description of the above technical solution: the grinding mechanism includes a rack fixedly connected to the extension frame, a gear meshingly connected to the rack, and the gear is rotatably arranged in a threaded block one, a pull rope is wrapped around the outer wall of the central axis of the gear, and a bracket is movably inserted into the end of the connecting block away from the grinding beads, a spring five is fixedly connected between one end of the bracket and the connecting block, rotating shafts are rotatably arranged on two opposite sides of the bracket, and friction belts are connected to the outer walls of the two rotating shafts, a torsion spring is fixedly connected between the outer wall of one of the rotating shafts and the bracket, and the other end of the pull rope is wrapped around the outer wall of the rotating shaft.

[0013] As a further description of the above technical solution: four of the automatic positioning mechanisms and four of the grinding mechanisms are provided.

[0014] As a further description of the above technical solution: the conductive block is electrically connected to the switch of the air pump, and the air pump is connected to two adjacent cavities.

[0015] As a further description of the above technical solution: an inclined surface is provided on one end of the sliding block close to the extrusion column 1.

[0016] As a further description of the above technical solution: during grinding, the friction belt can drive the grinding beads to rotate, and the rotation direction of the grinding beads is opposite to the moving direction of the threaded block.

[0017] The present invention provides an H-beam side flange plate welding device through improvement, which has the following improvements and advantages compared with the prior art:

[0018] First, when the first slide moves along the length of the first threaded block, it also drives the second slide to move. At this time, the welding head is also located in the area on the H-shaped steel that needs to be welded, realizing automatic positioning of the welding position of the H-shaped steel and being applicable to different types of steel. Due to the setting of the grinding beads, the friction between the first slide and the H-shaped steel can be reduced when adjusting the position, preventing the H-shaped steel from being damaged.

[0019] Second, after being squeezed by the squeezing column, the slide one moves away from the slide two, and the welding head can still be located at the area on the H-shaped steel that needs to be welded. Then, the motor moves the threaded block two to one end of the H-shaped steel, so that the welding head can weld from the top of the H-shaped steel. After positioning, the grinding beads can avoid the welding head while maintaining their original length to prevent interference with welding.

[0020] Third: After the welding is completed, another motor is used to move the thread block 1 toward the welding head. The friction belt can be rotated through the transmission of the rack, gear, pull rope, rotating shaft and friction belt, so that the friction belt drives the grinding beads to rotate through friction, which can perform all-round grinding on the H-shaped steel welding point. The direction of rotation of the grinding beads is opposite to the direction of movement of the thread block 1, which can further improve the grinding effect.

[0021] To sum up, through the setting of the grinding beads, the slide 1 can reduce the friction between the slide and the H-shaped steel when automatically adjusting its position, thereby preventing the H-shaped steel from being damaged, and after positioning, the grinding beads can avoid the welding head while maintaining the original length to prevent affecting the welding. When the thread block 1 moves toward the welding head, the grinding beads can have a grinding effect, and the direction of rotation of the grinding beads is opposite to the direction of movement of the thread block 1, which can further improve the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 A schematic structural diagram of a side flange plate welding device for an H-shaped steel beam provided in an embodiment of the present invention;

[0024] Figure 2 A perspective cross-sectional view of a frame provided by an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a motor provided in an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of an automatic positioning mechanism provided in an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of a grinding mechanism provided in an embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of a slider provided in an embodiment of the present invention;

[0029] Figure 7 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 8 for Figure 2 Enlarged view of point B in the middle;

[0031] Figure 9 for Figure 2 Enlarged view of point C in the middle;

[0032] Figure 10 for Figure 4 Enlarged view of point D in the middle.

[0033] Figure 1: Base; 2: Electric lift rod; 3: Frame; 4: Air pump; 5: Electric push rod; 6: H-shaped steel; 7: Automatic positioning mechanism; 71: Cavity; 72: Insert plate; 73: Slide plate; 74: Extension frame; 75: Threaded block 1; 76: Threaded block 2; 77: Welding head; 78: Slide frame 1; 79: Connecting block; 710: Grinding beads; 711: Slide frame 2; 712: Extrusion rod; 713: Magnetic frame; 714: Magnetic strip; 715: Spring 1 ; 716, plug block; 717, spring two; 718, plug rod; 719, spring three; 720, conductive block; 721, motor; 8, avoidance mechanism; 81, squeeze column one; 82, squeeze column two; 83, notch; 84, magnetic block; 85, sleeve; 86, slider; 87, spring four; 9, grinding mechanism; 91, rack; 92, gear; 93, pull rope; 94, plug rack; 95, spring five; 96, rotating shaft; 97, torsion spring; 98, friction belt. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless they conflict.

[0035] See also Figure 1 - Figure 10 The embodiment of the present invention provides a technical solution: an H-shaped steel beam side flange plate welding device, comprising a base 1 and a frame 3 located on the upper side of the base 1, wherein two frames 3 are symmetrically provided, and an electric lifting rod 2 is fixedly connected between the bottom ends of the two frames 3 and the base 1, an air pump 4 is provided at one end of the frame 3, and an electric push rod 5 is provided at the opposite ends of the two frames 3, and an H-shaped steel 6 is provided between the two frames 3, and further comprising:

[0036] An automatic positioning mechanism 7, capable of automatically positioning the area to be welded, and the automatic positioning mechanism 7 is provided on the frame 3;

[0037] The avoidance mechanism 8 can make the automatic positioning mechanism 7 avoid the welding assembly after positioning, and the avoidance mechanism 8 is arranged in the automatic positioning mechanism 7;

[0038] And the grinding mechanism 9 can automatically grind the welding position, and the grinding mechanism 9 is arranged in the automatic positioning mechanism 7.

[0039] There are four automatic positioning mechanisms 7 and four grinding mechanisms 9 .

[0040] Specifically, by setting the grinding beads 710, the slide 78 can reduce the friction between the H-shaped steel 6 and the slide 78 when automatically adjusting its position, thereby preventing the H-shaped steel 6 from being damaged. After positioning, the grinding beads 710 can avoid the welding head 77 while maintaining the original length, thereby preventing the welding from being affected. When the threaded block 75 moves toward the welding head 77, the grinding beads 710 can have a grinding effect, and the direction of rotation of the grinding beads 710 is opposite to the direction of movement of the threaded block 75, which can further improve the grinding effect.

[0041] In another embodiment provided by the present invention, the automatic positioning mechanism 7 includes a cavity 71 opened on the upper and lower opposite sides of the frame 3, and plug plates 72 are inserted in the upper and lower parts of the cavity 71. Slide plates 73 are provided at the opposite ends of the upper and lower plug plates 72 for horizontal sliding. The end of the slide plate 73 away from the H-shaped steel 6 is fixedly connected to the protruding end of the electric push rod 5, and one end of the slide plate 73 extends outside the frame 3. The end of the slide plate 73 extending outside the frame 3 is fixedly connected to an extension frame 74, and the extension frame 74 is arranged close to the other frame 3. A threaded block 1 75 and a threaded block 2 76 are slidably provided in the extension frame 74, and a threaded rod is threadedly connected in the threaded block 1 75 and the threaded block 2 76. The threaded rod is rotatably provided in the extension frame 74, and a motor 721 is fixed to the outer wall of one end of the extension frame 74. A slide plate 2 711 is slidably provided on the upper end of the threaded block 2 76, and the slide plate 2 711 is close to the H-shaped steel 6 One end of the slide 78 is provided with a welding head 77, a slide 78 is slidably provided in the threaded block 75, an insertion rod 718 is movably inserted into the end of the slide 78 close to the H-shaped steel 6, and a spring 719 is fixedly connected between one end of the insertion rod 718 and the slide 78, a conductive block 720 is provided on the slide 78, and an end of the insertion rod 718 located outside the slide 78 is fixedly connected to a connecting block 79, and an end of the connecting block 79 away from the insertion rod 718 is movably embedded with a grinding bead 710 , an insert block 716 is slidingly provided at one end of the slide 78 close to the H-shaped steel 6, a spring 2 717 is fixedly connected between the insert block 716 and the threaded block 1 75, an extrusion rod 712 is fixedly connected to one end of the slide 1 78 close to the slide 2 711, the extrusion rod 712 is in contact with the magnetic frame 713, the magnetic frame 713 is slidingly provided on the slide 2 711, a spring 1 715 is fixedly connected between one end of the magnetic frame 713 and the slide 2 711, and a magnetic strip 714 is fixedly connected to the threaded block 2 76.

[0042] The conductive block 720 is electrically connected to the switch of the air pump 4 , and the air pump 4 is communicated with the two adjacent cavities 71 .

[0043] Specifically, when the slide 1 78 moves along the length direction of the threaded block 1 75 , it will also drive the slide 2 711 to move. At this time, the welding head 77 is also located in the area on the H-shaped steel 6 that needs to be welded, thereby realizing automatic positioning of the welding position of the H-shaped steel 6 and being applicable to different types of steel. Due to the setting of the grinding beads 710, the slide 1 78 can reduce the friction between the H-shaped steel 6 and the H-shaped steel 6 when adjusting its position, thereby preventing the H-shaped steel 6 from being damaged.

[0044] In another embodiment provided by the present invention, the avoidance mechanism 8 includes an extrusion column 81 fixedly connected to the threaded block 75, and the extrusion column 81 is arranged away from the H-shaped steel 6. A slot 83 is provided on both the threaded block 75 and the threaded block 2 76. An extrusion column 2 82 is provided on the end of the extension frame 74 close to the motor 721, and a magnetic block 84 is provided on the end of the threaded block 75 away from the H-shaped steel 6. A slider 86 is fixedly connected to the slide 78, and a sliding sleeve 85 is provided on the outer side of the slider 86. A spring 4 87 is fixedly connected between the slider 86 and the sliding sleeve 85.

[0045] An end of the slider 86 close to the extrusion column 81 is provided with an inclined surface.

[0046] Specifically, after being squeezed by the squeezing column 1 81, the slide 1 78 moves away from the slide 2 711, and the welding head 77 can still be located in the area on the H-shaped steel 6 that needs to be welded. Then, the motor 721 moves the threaded block 2 76 to one end of the H-shaped steel 6, so that the welding head 77 can be welded from the top of the H-shaped steel 6. After positioning, the grinding bead 710 can avoid the welding head 77 while maintaining its original length to prevent it from affecting the welding.

[0047] In another embodiment provided by the present invention, the grinding mechanism 9 includes a rack 91 fixedly connected to the extension frame 74, and a gear 92 is meshedly connected to the rack 91, and the gear 92 is rotatably set in the threaded block 75, and a pull rope 93 is wrapped around the outer wall of the central axis of the gear 92, and a rack 94 is movably inserted at the end of the connecting block 79 away from the grinding beads 710, and a spring 95 is fixed between one end of the rack 94 and the connecting block 79, and rotating shafts 96 are rotatably set on the two opposite sides of the inside of the rack 94, and the outer walls of the two rotating shafts 96 are connected to friction belts 98, a torsion spring 97 is fixed between the outer wall of one of the rotating shafts 96 and the rack 94, and the other end of the pull rope 93 is wrapped around the outer wall of the rotating shaft 96.

[0048] During grinding, the friction belt 98 can drive the grinding beads 710 to rotate, and the rotation direction of the grinding beads 710 is opposite to the moving direction of the threaded block 75.

[0049] Specifically, after welding is completed, another motor 721 is used to move the threaded block 75 toward the welding head 77. The friction belt 98 can be rotated through the transmission of the rack 91, the gear 92, the pull rope 93, the rotating shaft 96 and the friction belt 98, so that the friction belt 98 drives the grinding beads 710 to rotate through the friction force, and the welding point of the H-shaped steel 6 can be polished in all directions. The direction of rotation of the grinding beads 710 is opposite to the direction of movement of the threaded block 75, which can further improve the polishing effect.

[0050] Working principle: Before welding, first place the H-shaped steel 6 on the upper surface of the bottom end of the two frames 3, align one end of the H-shaped steel 6 with the grinding beads 710, then start the electric push rod 5, move the slide plate 73 and the extension frame 74 toward the H-shaped steel 6, so that the grinding beads 710 and the H-shaped steel 6 are in conflict. When the extension frame 74 is close to one end of the H-shaped steel 6 and is pressed against the H-shaped steel 6, the connecting block 79 and the insertion rod 718 are also pressed inward, and the insertion rod 718 is in contact with the conductive block 720, so that the conductive blocks 720 on both sides are connected, and the air pump 4 is started to extract the air in the cavity 71, and the plug plate 72 will drive the slide plate 73 and the extension frame 74 toward the H-shaped steel 6, after the extension frame 74 is pressed against the H-shaped steel 6, the slide 1 78 is located in the extension frame 74 at the end away from the H-shaped steel 6. Since the extrusion rod 712 is inserted into the slide 2 711, when the slide 1 78 moves along the length direction of the threaded block 1 75, it also drives the slide 2 711 to move. At this time, the welding head 77 is also located in the area on the H-shaped steel 6 that needs to be welded, realizing automatic positioning of the welding position of the H-shaped steel 6 and being applicable to different types of steel. Due to the provision of the grinding beads 710, the friction between the slide 1 78 and the H-shaped steel 6 can be reduced when adjusting the position, thereby preventing the H-shaped steel 6 from being damaged.

[0051] When the slide 1 78 approaches the magnetic block 84, the insertion rod 718 and the slide 1 78 are both attracted, and the squeeze column 1 81 squeezes the slider 86 outward, so that the grinding bead 710 is separated from the H-shaped steel 6. However, due to the adsorption of the magnetic block 84, the slide 1 78 can only move along the length direction of the H-shaped steel 6, and the insertion rod 718 is still completely compressed inside the slide 1 78. After being squeezed by the squeeze column 1 81, the slide 1 78 moves away from the slide 2 711, the squeeze rod 712 is separated from the magnetic frame 713, and the magnetic frame 713 moves toward The magnetic strip 714 moves, and the bottom end of the magnetic frame 713 is attracted by the magnetic strip 714. The second slide 711 is fixed, so that after the first slide 78 moves away from the second slide 711, the welding head 77 can still be located at the area to be welded on the H-shaped steel 6. Then, the motor 721 moves the second threaded block 76 to one end of the H-shaped steel 6, so that the welding head 77 can weld from the top of the H-shaped steel 6. After positioning, the grinding beads 710 can avoid the welding head 77 while maintaining the original length to prevent it from affecting the welding.

[0052] When welding is completed, another motor 721 is used to move the threaded block 75 toward the welding head 77. The friction belt 98 is rotated by the transmission of the rack 91, the gear 92, the pull rope 93, the rotating shaft 96 and the friction belt 98. The friction belt 98 drives the grinding beads 710 to rotate through the friction force, so that the welding part of the H-shaped steel 6 can be fully polished. The direction of rotation of the grinding beads 710 is opposite to the direction of movement of the threaded block 75, which can further improve the polishing effect.

[0053] It should be noted that when the insert plate 72 is adjusted up and down, the insert rod 718 is not completely pressed into the slide 78. At this time, the friction belt 98 does not contact the grinding beads 710, so that the grinding beads 710 can rotate freely during adjustment without being resisted by the friction belt 98. When the adjustment is completed, the slide 78 contacts the magnetic block 84, and the insert rod 718 is completely inserted into the slide 78 by the H-shaped steel 6. At this time, the friction belt 98 contacts the grinding beads 710 again, which can drive the grinding beads 710 to rotate.

[0054] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for the side flange plate of an H-shaped steel beam, comprising a base (1) and a frame (3) located on the upper side of the base (1), wherein two frames (3) are symmetrically provided, an electric lifting rod (2) is fixedly connected between the bottom ends of the two frames (3) and the base (1), an air pump (4) is provided at one end of the frame (3), and electric push rods (5) are provided at opposite ends of the two frames (3), and an H-shaped steel (6) is provided between the two frames (3), characterized in that: Also includes: An automatic positioning mechanism (7) capable of automatically positioning an area to be welded, wherein the automatic positioning mechanism (7) is arranged on the frame (3); An avoidance mechanism (8) is capable of enabling the automatic positioning mechanism (7) to avoid the welding assembly after positioning, and the avoidance mechanism (8) is arranged in the automatic positioning mechanism (7); And a grinding mechanism (9) can automatically grind the welding position, and the grinding mechanism (9) is arranged in the automatic positioning mechanism (7).

2. The H-beam side flange plate welding device according to claim 1, characterized in that: The automatic positioning mechanism (7) includes a cavity (71) opened on the upper and lower opposite sides of the frame (3), and plug plates (72) are inserted into the cavity (71). The upper and lower opposite ends of the two plug plates (72) are provided with slide plates (73) for horizontal sliding. The end of the slide plate (73) away from the H-shaped steel (6) is fixedly connected to the protruding end of the electric push rod (5), and one end of the slide plate (73) extends outside the frame (3). The end of the slide plate (73) extending outside the frame (3) is fixedly connected to an extension frame (74), and the extension frame (74) is close to the other frame ( 3) setting, the extension frame (74) is provided with a threaded block 1 (75) and a threaded block 2 (76) slidingly, the threaded block 1 (75) and the threaded block 2 (76) are both threadedly connected to a threaded rod, the threaded rod is rotatably set in the extension frame (74), one end of the threaded rod is fixedly connected to a motor (721), and the motor (721) is fixedly connected to the outer wall of one end of the extension frame (74), the upper end of the threaded block 2 (76) is provided with a slide frame 2 (711) slidingly, and the end of the slide frame 2 (711) close to the H-shaped steel (6) is provided with a welding head (77) , a slide (78) is slidably provided in the threaded block (75), an insert rod (718) is movably inserted into the end of the slide (78) close to the H-shaped steel (6), and a spring (719) is fixedly connected between one end of the insert rod (718) and the slide (78), a conductive block (720) is provided on the slide (78), an end of the insert rod (718) located outside the slide (78) is fixedly connected to a connecting block (79), and a grinding bead (710) is movably embedded in the end of the connecting block (79) away from the insert rod (718), and the slide (78) is fixedly connected to the end of the insert rod (718). ) is provided with an insert block (716) slidingly near one end of the H-shaped steel (6), a spring 2 (717) is fixedly connected between the insert block (716) and the threaded block 1 (75), an extrusion rod (712) is fixedly connected to one end of the slide 1 (78) near the slide 2 (711), the extrusion rod (712) is in contact with a magnetic frame (713), the magnetic frame (713) is slidably provided on the slide 2 (711), a spring 1 (715) is fixedly connected between one end of the magnetic frame (713) and the slide 2 (711), and a magnetic strip (714) is fixedly connected to the threaded block 2 (76).

3. The H-beam side flange plate welding device according to claim 2, characterized in that: The avoidance mechanism (8) includes a squeeze column (81) fixedly connected to the threaded block (75), and the squeeze column (81) is arranged away from the H-shaped steel (6). The threaded block (75) and the threaded block (76) are both provided with a slot (83). The end of the extension frame (74) close to the motor (721) is provided with a squeeze column (82). The end of the threaded block (75) away from the H-shaped steel (6) is provided with a magnetic block (84). The slide frame (78) is fixedly connected to a slider (86). The outer side of the slider (86) is provided with a sliding sleeve (85). A spring (87) is fixedly connected between the slider (86) and the sliding sleeve (85).

4. The H-beam side flange welding device according to claim 2, characterized in that: The grinding mechanism (9) includes a rack (91) fixed on the extension frame (74), a gear (92) meshingly connected to the rack (91), and the gear (92) is rotatably arranged in the threaded block (75), a pull rope (93) is wound around the outer wall of the central axis of the gear (92), and a plug-in frame (94) is movably inserted at one end of the connecting block (79) away from the grinding beads (710), a spring (95) is fixed between one end of the plug-in frame (94) and the connecting block (79), a rotating shaft (96) is rotatably arranged on both opposite sides of the inside of the plug-in frame (94), and the outer walls of the two rotating shafts (96) are connected to friction belts (98), a torsion spring (97) is fixed between the outer wall of one of the rotating shafts (96) and the plug-in frame (94), and the other end of the pull rope (93) is wound around the outer wall of the rotating shaft (96).

5. The H-beam side flange welding device according to claim 1, characterized in that: Four of the automatic positioning mechanisms (7) and the grinding mechanisms (9) are provided.

6. The H-beam side flange welding device according to claim 2, characterized in that: The conductive block (720) is electrically connected to a switch of the air pump (4), and the air pump (4) is in communication with two adjacent cavities (71).

7. The H-beam side flange plate welding device according to claim 3, characterized in that: The sliding block (86) has an inclined surface at one end close to the extrusion column (81).

8. The H-beam side flange welding device according to claim 4, characterized in that: During grinding, the friction belt (98) can drive the grinding beads (710) to rotate, and the rotation direction of the grinding beads (710) is opposite to the moving direction of the threaded block (75).

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