Support welding device and welding method for steel structure box beam

Abstract

The present invention relates to a support welding device and a welding method for a steel structure box beam, comprising: a support system, a welding support mechanism and a welding robot; the support system can adjust the distance between the supporting square steels on the left and right sides through an adjusting head, and the supporting square steels arranged front and back are connected into a whole by connecting square steels, so that the device has better integrity and can also be directly used as a tire frame, thereby improving efficiency; the welding support system moves along the rails, so that the use of the welding robot is more flexible and the equipment installation process is simplified, and at the same time, the power gear and the lower rack arranged in the outer shell are used to further improve the maneuverability of the welding robot, so that the welding robot can adapt to the welding work of various types of bridge components at various positions; the support system and the slidable welding support mechanism are separated from each other, and the support system is fixed to the ground. The design ensures that the welding robot has a higher degree of freedom and improves the reliability of the support system.

Description

Technical Field

[0001] The invention relates to the field of bridge welding equipment, in particular to a support welding device and a welding method for a steel structure box beam. Background Art

[0002] With the acceleration of my country's urbanization process, steel bridges have been widely used in railways, highways, dual-use bridges and pedestrian bridges due to their high strength, light weight and short construction period. Steel structure buildings have been deeply integrated into the production and life of the people. Among the many steel structures, the box beam structure is undoubtedly the most common one. It is widely used in a large number of engineering practices such as bridge engineering, and it is usually used as the main load-bearing component.

[0003] Since the construction of steel structure box beams is in the form of prefabrication in sections and overlapped and installed on site, welding has become an indispensable part. Welding is the main way to connect this type of steel structure, which can permanently connect steel together to form a solid structural system. In the construction of steel structure box beams, welding can ensure the close connection between the various components, thereby maintaining the overall stability of the steel structure box beam. Steel structure box beams are usually an important part of the structure, and their welding quality is directly related to the overall safety and durability of the structure. At the same time, since most steel structure box beams are prefabricated in sections and overlapped and installed on site, a lot of welding work is involved in the process, so how to improve the efficiency of welding work is also a topic worthy of study.

[0004] At present, in order to improve welding efficiency and make the overall welding effect controllable, welding robots are widely used in bridge welding work. The welding robots put into use are generally divided into pedestal type and mechanical arm type. Pedestal welding equipment has a lower cost, but has poor adaptability to large and special-shaped structures. Equipment that is compatible with large and special-shaped structures is usually large-scale integrated molding equipment, which occupies a large space, requires a large capital investment, and is difficult to promote. Robotic arm welding equipment is more flexible and has excellent adaptability to special-shaped structures. It can also be expanded to large structures in conjunction with other mechanisms. However, when this type of equipment welds the bottom of a steel box beam, the component needs to be lifted to a certain height. This process not only requires the cooperation of large lifting equipment but is also relatively dangerous. If the component is placed on a tire frame that meets the conditions in advance, the welding robot is often unable to weld the top of the bridge due to insufficient arm span of the robotic arm, which greatly limits the promotion of this type of equipment. At the same time, it is worth noting that the vast majority of welding equipment on the market that can weld large steel box beams is specialized equipment, which means that when welding, it is necessary to transfer or deploy the equipment to a designated location, and withdraw or transfer the equipment to other locations after welding is completed, which greatly reduces manufacturing efficiency.

[0005] Therefore, it is necessary to provide a support welding device and a welding method for a steel structure box beam to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a support welding device and a welding method for a steel structure box beam. Through a movable welding support mechanism, the maneuverability of a welding robot is improved, so that the welding robot can adapt to welding work at various positions of various types of bridge components; the reliability of the support system is guaranteed by a fixed support design; the welding support system moves along the rails, making the use of the welding robot more flexible and simplifying the equipment installation process; the support system can not only be used as a support during welding, but also as a tire frame, avoiding the problem of frequent transfer of components and improving efficiency.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a support welding device and a welding method for a steel structure box beam, including: a support system, a welding support mechanism and a welding robot, the support system includes a support square steel and an upper base, the support square steel is a square cylinder, the support square steel is symmetrical and arranged side by side front and back, a lower base is installed at the lower end of the support square steel, the lower base is square, and lower base fixing bolts for fixing to the ground are installed on the periphery, and a connecting angle is arranged above the lower base fixing bolt, and the connecting angle is symmetrically arranged front and back at The outer surface of the supporting square steel is provided with connecting square steels between the connecting angles, the connecting square steels are fixed to the connecting angles by lower connecting bolts, an external connecting hole is provided above the supporting square steel, the external connecting hole passes through the supporting square steel horizontally, an L-shaped fixed angle steel is provided at the upper end of the upper base, the fixed angle steels are symmetrically arranged front to back, a supporting I-beam is provided at the middle gap of the fixed angle steels, an internal connecting hole is provided at the lower end of the upper base, the upper base can be inserted along the top end of the supporting square steel and fixed to the upper end of the supporting square steel by means of upper connecting bolts.

[0008] The welding support mechanism includes: an outer shell, which is a left-right symmetrical arc square groove, the highest elevation of the outer shell is 1.2 to 1.5 times the highest elevation of the support system, one end of the outer shell is fixed to the left base, and the other end is fixed to the right base, a middle rail is wrapped in the outer shell, and the middle rail is coaxially arranged with the outer shell, one end of the middle rail is fixed to the left base, and the other end is fixed to the right base, the left base and the right base are arranged parallel to each other, a welding machine and a gas cylinder are installed above the left base, a power wheel is installed below the left base, a control cabinet is installed above the right base, and a power wheel is installed below the right base, the left base and the right base are respectively arranged in the ground trough, rails are installed in the ground trough, the rails are arranged parallel to the ground trough, and power wheels run above the rails.

[0009] The welding robot comprises: a multi-degree-of-freedom mechanical arm, the multi-degree-of-freedom mechanical arm has at least 4 degrees of freedom, a welding head is installed at the arm end of the multi-degree-of-freedom mechanical arm, and a wire feeder is installed on the outer surface of the multi-degree-of-freedom mechanical arm above the welding head.

[0010] The support system also includes: a hinge support, the hinge support is installed at the upper end of the outer surface of the supporting square steel, and a longitudinal slide rail is arranged under the hinge support, the longitudinal slide rail is installed parallel to the longitudinal axis of the supporting square steel, and the longitudinal slide rail is installed with a movable connection hinge, and the movable connection hinge can slide along the longitudinal slide rail, and the installation direction of the movable connection hinge is consistent with the hinge support, the hinge support and the movable connection hinge on the supporting square steels arranged side by side on the left and right should be installed symmetrically facing each other, and a connecting piece is installed between the symmetrical hinge support and the movable connection hinge, the connecting piece is X-shaped, and a connecting hinge is installed at the intersection of the connecting pieces, and the connecting piece can be opened and closed up and down with the connecting hinge as the center, and an adjusting hinge is arranged between the connecting hinge and the hinge support, the adjusting hinge is collinear up and down and installed parallel to the connecting piece on the left and right, and an adjusting screw is installed through the connecting piece up and down, the adjusting screw is arranged symmetrically parallel to the supporting square steel, and an adjusting head is installed at the bottom end of the adjusting screw, and the adjusting head is a truncated cone structure that is narrow at the top and wide at the bottom.

[0011] The welding support mechanism also includes: a power box, which is square in shape, and has power gear one and power gear two symmetrically arranged on the left and right sides of the power box, the power gear one is located below the power gear two, the power gear one and the power gear two are arranged vertically in the same line, the power gear one is meshed with the lower rack, and the lower rack is arranged along the lower edge of the inner wall of the outer shell, the power gear two is meshed with the upper rack, and the upper rack is arranged along the upper edge of the inner wall of the outer shell, and the lower rack and the upper rack are arranged relatively to each other up and down.

[0012] The power box moves along the lower rack in the outer shell groove under the drive of the power gear. A middle rail runs through the middle of the power box. The middle rail is a thick-walled pipe groove, and cables pass through the inside of the middle rail.

[0013] The multi-degree-of-freedom mechanical arm is installed on the lower surface of the outer layer of the power box.

[0014] A welding method for a support welding device of a steel structure box beam comprises the following steps:

[0015] Step a: according to the size of the steel bridge box girder, the adjusting head is rotated to separate the left and right supporting square steels to a specified distance, and the supporting square steels are erected to fix the structure to the ground with the lower base fixing bolts. After the arrangement of each row of supporting square steels is completed, the connecting square steels are fixed to the connecting angles with the lower connecting bolts, so that the front and rear supporting square steels form a whole;

[0016] Step b, install the upper base to the top of the supporting square steel, insert the upper connecting bolt into the outer connecting hole and tighten it, insert the supporting frame I-beam into the gap of the fixed angle steel, and finally hoist the steel bridge box girder to be welded to the upper surface of the supporting frame I-beam;

[0017] Step c, input the welding data into the control cabinet, the control cabinet issues a command, the power wheel moves along the rail, driving the welding robot to the specified position, once the power gear is started, the power box is driven to move along the lower rack until the welding robot reaches the specified height, the multi-degree-of-freedom robotic arm is started, driving the welding head to the welding position, the wire feeder is started, and the welding head starts welding.

[0018] Compared with the related art, the present invention has the following beneficial effects:

[0019] (1) The support system adopts a modular design, and can be manually adjusted or suitable accessories can be selected for different components to adapt to different components. At the same time, the supporting square steels arranged in front and behind are connected and fixed to the ground by connecting square steels, and the structural integrity is good;

[0020] (2) The support system and the slidable welding support mechanism are separated from each other, so that the welding robot arranged on the welding support mechanism can move freely in a larger range, thereby improving the efficiency and accuracy of the welding operation and ensuring the reliability of the support during welding;

[0021] (3) The welding robot is installed on the power box and moves along the arc-shaped outer shell with the power box, so that it can adapt to complex bridge structures by coordinating the longitudinal movement on the track and the multi-degree-of-freedom movement of the robot arm, so that the welding robot can easily reach corners and gaps that are difficult to reach with traditional welding equipment, ensuring the comprehensiveness and accuracy of the welding work;

[0022] (4) The middle rail is a thick-walled tube groove, and various types of cables are passed through it. By bundling the cables and isolating them from the outside world, the impact of high temperature, sparks and spatter on the cables during welding is effectively avoided, thereby reducing the risk of safety accidents such as fire;

[0023] (5) The support system can be used directly as a tire frame, and the components can complete the entire process from assembly to welding in the same location without frequent movement or transfer; this not only reduces the workload of handling and repositioning, but also reduces the risk of collision or damage that may occur during the transfer process;

[0024] (6) The welding robot is equipped with a wire feeder behind the welding head, which replaces the cumbersome process of manually adding welding wire in traditional welding operations, improves the continuity of welding work, and improves welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a three-dimensional schematic diagram of a support welding device for a steel structure box beam of the present invention;

[0026] Figure 2 is a three-dimensional schematic diagram of the support system of the present invention;

[0027] Figure 3 It is a three-dimensional schematic diagram of the upper structure of the support system of the present invention;

[0028] Figure 4 A three-dimensional schematic diagram of the welding support mechanism of the present invention;

[0029] Figure 5 for Figure 4 A partial enlarged view of part A;

[0030] Figure 6 It is a three-dimensional schematic diagram of the central structure of the support system of the present invention;

[0031] Figure 7 for Figure 4 Schematic diagram of the three-dimensional cross-section of the internal structure of part A;

[0032] The following are marked in the figure:

[0033] 1-support system, 2-welding support mechanism, 3-welding robot, 101-steel bridge box girder, 102-frame I-beam, 103-supporting square steel, 104-lower base, 105-lower base fixing bolt, 106-connecting angle, 107-lower connecting bolt, 108-connecting square steel, 109-upper connecting bolt, 110-upper base, 111-fixed angle steel, 112-external connecting hole, 113-internal connecting hole, 114-connecting piece, 115-hinge support, 116-adjusting screw, 117-connecting hinge, 118-adjusting Joint hinge, 119-adjusting head, 120-movable connecting hinge, 121-longitudinal slide rail, 201-outer shell, 202-left base, 203-welding machine, 204-gas cylinder, 205-control cabinet, 206-rail, 207-power wheel, 208-ground trough, 209-middle rail, 210-lower rack, 211-upper rack, 212-power gear one, 213-power gear two, 214-power box, 215-cable, 216-right base, 301-multi-degree-of-freedom robotic arm, 302-wire feeder, 303-welding head. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right" and the like, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0035] like Figure 1-Figure 3 As shown, a support welding device for a steel structure box beam comprises: a support system 1, a welding support mechanism 2 and a welding robot 3, wherein the support system 1 comprises a support square steel 103 and an upper base 110, wherein the support square steel 103 is a square cylinder, wherein the support square steel 103 is symmetrical and arranged side by side front and back, wherein a lower base 104 is installed at the lower end of the support square steel 103, wherein the lower base 104 is square and has lower base fixing bolts 105 for fixing to the ground installed on the periphery, wherein a connecting angle 106 is arranged above the lower base fixing bolt 105, wherein the connecting angle 106 is symmetrically arranged on the outer surface of the support square steel 103 front and back, and a connecting angle 106 is installed between the connecting angles 106 to fix the lower base fixing bolts 105 to the ground. A connecting square steel 108 is used to connect the supporting square steel 103. The connecting square steel 108 is fixed to the connecting angle 106 by means of a lower connecting bolt 107. An external connecting hole 112 is provided above the supporting square steel 103. The external connecting hole 112 passes through the supporting square steel 103 horizontally. An L-shaped fixed angle steel 111 is installed at the upper end of the upper base 110. The fixed angle steel 111 is symmetrically arranged front to back. A supporting I-beam 102 is installed in the middle gap of the fixed angle steel 111. An internal connecting hole 113 is provided at the lower end of the upper base 110. The upper base 110 can be inserted along the top end of the supporting square steel 103 and fixed to the upper end of the supporting square steel 103 by means of an upper connecting bolt 109.

[0036] like Figure 1-Figure 4As shown, the welding support mechanism 2 includes: an outer shell 201, the outer shell 201 is a left-right symmetrical circular arc square groove, the highest elevation of the outer shell 201 is 1.2 to 1.5 times the highest elevation of the support system 1, one end of the outer shell 201 is fixed to the left base 202, and the other end is fixed to the right base 216, the outer shell 201 is wrapped with a middle rail 209, the middle rail 209 is coaxially arranged with the outer shell 201, one end of the middle rail 209 is fixed to the left base 202, and the other end is fixed to the right base 216, the left The base 202 and the right base 216 are arranged parallel to each other, a welding machine 203 and a gas cylinder 204 are installed above the left base 202, a power wheel 207 is installed below the left base 202, a control cabinet 205 is installed above the right base 216, and a power wheel 207 is installed below the right base 216. The left base 202 and the right base 216 are respectively arranged in a ground trough 208, and a rail 206 is installed in the ground trough 208. The rail 206 is arranged parallel to the ground trough 208, and a power wheel 207 runs above the rail 206.

[0037] like Figure 5 As shown, the welding robot 3 includes: a multi-degree-of-freedom robotic arm 301, the multi-degree-of-freedom robotic arm 301 has at least 4 degrees of freedom, a welding head 303 is installed at the arm end of the multi-degree-of-freedom robotic arm 301, and a wire feeder 302 is installed on the outer surface of the multi-degree-of-freedom robotic arm 301 above the welding head 303.

[0038] like Figure 6 As shown, the support system 1 also includes: a hinge support 115, the hinge support 115 is installed on the upper end of the outer surface of the supporting square steel 103, a longitudinal slide rail 121 is arranged below the hinge support 115, the longitudinal slide rail 121 is installed parallel to the longitudinal axis of the supporting square steel 103, and a movable connection hinge 120 is installed on the longitudinal slide rail 121. The movable connection hinge 120 can slide along the longitudinal slide rail 121, and the installation direction of the movable connection hinge 120 is consistent with the hinge support 115. The hinge support 115 and the movable connection hinge 120 on the supporting square steel 103 arranged side by side on the left and right should be installed symmetrically facing each other. The hinge support 115 and the movable connection hinge 120 that are symmetrically facing each other should be installed symmetrically. 0 is installed with a connecting piece 114, the connecting piece 114 is X-shaped, a connecting hinge 117 is installed at the intersection of the connecting piece 114, the connecting piece 114 can be opened and closed up and down with the connecting hinge 117 as the center, an adjusting hinge 118 is arranged between the connecting hinge 117 and the hinge support 115, the adjusting hinge 118 is collinear up and down, and is installed on the connecting piece 114 in parallel left and right, an adjusting screw 116 is installed through the connecting piece 114 up and down, the adjusting screw 116 is arranged symmetrically left and right parallel to the supporting square steel 103, an adjusting head 119 is installed at the bottom of the adjusting screw 116, and the adjusting head 119 is a truncated cone structure that is narrow at the top and wide at the bottom.

[0039] like Figure 7As shown, the welding support mechanism 2 also includes: a power box 214, the power box 214 is square, and the power box 214 is symmetrically arranged with a power gear 1 212 and a power gear 2 213, the power gear 1 212 is located below the power gear 213, the power gear 1 212 and the power gear 2 213 are arranged vertically in the same line, the power gear 1 212 is meshed with the lower rack 210, the lower rack 210 is arranged along the lower edge of the inner wall of the outer shell 201, and the power gear 2 213 is meshed with the upper rack 210. The rack 211 is meshed, the upper rack 211 is arranged along the upper edge of the inner wall of the outer shell 201, the lower rack 210 and the upper rack 211 are arranged relatively to each other up and down, and the power box 214 moves along the lower rack 210 in the groove of the outer shell 201 under the drive of the power gear 212. A middle rail 209 passes through the middle of the power box 214, and the middle rail 209 is a thick-walled pipe groove. A cable 215 passes through the inside of the middle rail 209. The multi-degree-of-freedom robotic arm 301 is installed on the outer lower surface of the power box 214.

[0040] In this embodiment, the support system 1 can be directly used as a tire frame, and the components can complete the entire process from assembly to welding at the same position without frequent movement or transfer, which improves efficiency and reduces the probability of component damage; at the same time, the support system 1 adopts a modular design, and the distance between the supporting square steels 103 on the left and right sides can be adjusted by adjusting the head 119. The supporting square steels 103 arranged in front and behind are connected as a whole by connecting square steels 108, and the upper base 110 of appropriate size is selected, so that the structure can adapt to steel bridge box girders 101 of different sizes while also making the device have better integrity; the support system 1 and the slidable welding support mechanism 2 are separated from each other, so that the welding robot 3 arranged on the welding support mechanism 2 can move freely in a larger range, which improves the efficiency and accuracy of the welding operation. At the same time, the reliability of support during welding is ensured; the welding robot 3 is installed on the power box 214 and moves along the lower rack 210 in the arc-shaped outer shell 201 under the drive of the power gear 212. At the same time, the power wheel 207 can move on the rail 206 to drive the welding robot 3 to move longitudinally, which allows the welding head 303 to easily reach corners and gaps that are difficult to reach with traditional welding equipment under the drive of the multi-degree-of-freedom robotic arm 301, which not only ensures the comprehensiveness and accuracy of the welding work but also enables it to weld various complex structures; the middle rail 209 coaxially arranged with the outer shell 201 is a thick-walled pipe groove, and various types of cables 215 are arranged inside it. By bundling the cables and isolating them from the outside world, the influence of high temperature, sparks and spatter on the cables during welding is effectively avoided, and the risk of safety accidents such as fire is reduced.

[0041] like Figure 1-Figure 7 As shown, a welding method for a support welding device of a steel structure box beam comprises the following steps:

[0042] Step a, according to the size of the steel bridge box girder 101, the adjusting head 119 is rotated to separate the left and right supporting square steels 103 from each other to a specified distance, and the supporting square steels 103 are erected and fixed to the ground using the lower base fixing bolts 105. After each row of supporting square steels 103 is arranged, the connecting square steels 108 are fixed to the connecting angles 106 using the lower connecting bolts 107, so that the front and rear supporting square steels 103 form a whole;

[0043] Step b, install the upper base 110 to the top of the supporting square steel 103, insert the upper connecting bolt 109 into the outer connecting hole 112 and tighten it, insert the supporting frame I-beam 102 into the gap of the fixed angle steel 111, and finally hoist the steel bridge box girder 101 to be welded to the upper surface of the supporting frame I-beam 102;

[0044] Step c, input the welding data into the control cabinet 205, the control cabinet 205 issues a command, the power wheel 207 moves along the rail 206, drives the welding robot 3 to the specified position, the power gear 212 is started, and the power box 214 is driven to move along the lower rack 210 until the welding robot 3 reaches the specified height, the multi-degree-of-freedom robot arm 301 is started, and the welding head 303 is driven to arrive at the welding position, the wire feeder 302 is started, and the welding head 303 starts welding.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the above description is only for explaining the principles of the present invention, and that various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and these changes and improvements all fall within the scope of the present invention claimed for protection.

[0046] The protection scope of the present invention is defined by the following claims and their equivalents.

Claims

1. A support welding device for a steel structure box beam, characterized in that: include: A support system (1), a welding support mechanism (2) and a welding robot (3), wherein the support system (1) comprises a support square steel (103) and an upper base (110), wherein the support square steel (103) is a square cylinder, wherein the support square steel (103) is symmetrical and arranged side by side front and back, wherein a lower base (104) is installed at the lower end of the support square steel (103), wherein the lower base (104) is square and has lower base fixing bolts (105) installed on the periphery for fixing to the ground, wherein a connecting angle (106) is arranged above the lower base fixing bolts (105), wherein the connecting angle (106) is arranged front and back symmetrically on the outer surface of the support square steel (103), and wherein the connecting angle (106) A connecting square steel (108) for connecting the supporting square steel (103) is installed between the upper and lower bases, the connecting square steel (108) being fixed to the connecting angle (106) by means of a lower connecting bolt (107), an outer connecting hole (112) being arranged above the supporting square steel (103), the outer connecting hole (112) penetrating the supporting square steel (103) transversely, an L-shaped fixing angle steel (111) being installed at the upper end of the upper base (110), the fixing angle steel (111) being arranged symmetrically front to back, a supporting I-beam (102) being installed at the gap in the middle of the fixing angle steel (111), an inner connecting hole (113) being arranged at the lower end of the upper base (110), the upper base (110) being able to be connected along the supporting square steel The top end of the support square steel (103) is inserted and fixed to the upper end of the supporting square steel (103) by means of an upper connecting bolt (109); the outer shell (201), the outer shell (201) is a left-right symmetrical circular arc square groove, the highest elevation of the outer shell (201) is 1.2 to 1.5 times the highest elevation of the supporting system (1), one end of the outer shell (201) is fixed to the left base (202), and the other end is fixed to the right base (216), the outer shell (201) is wrapped with a middle rail (209), the middle rail (209) is coaxially arranged with the outer shell (201), one end of the middle rail (209) is fixed to the left base (202), and the other end is fixed to the right base (216) ), the left base (202) and the right base (216) are arranged parallel to each other, a welding machine (203) and a gas cylinder (204) are installed above the left base (202), a power wheel (207) is installed below the left base (202), a control cabinet (205) is installed above the right base (216), and a power wheel (207) is installed below the right base (216), the left base (202) and the right base (216) are respectively arranged in a ground trough (208), a rail (206) is installed in the ground trough (208), the rail (206) is arranged parallel to the ground trough (208), and a power wheel (207) runs above the rail (206).

2. A support welding device for a steel structure box beam as claimed in claim 1, characterized in that: The welding robot (3) comprises: a multi-degree-of-freedom mechanical arm (301), the multi-degree-of-freedom mechanical arm (301) having at least four degrees of freedom, a welding head (303) being mounted on the arm end of the multi-degree-of-freedom mechanical arm (301), and a wire feeder (302) being mounted on the outer surface of the multi-degree-of-freedom mechanical arm (301) above the welding head (303).

3. A support welding device for a steel structure box beam as claimed in claim 2, characterized in that: The support system (1) further comprises: a hinge support (115), wherein the hinge support (115) is installed at the upper end of the outer surface of the supporting square steel (103), a longitudinal slide rail (121) is arranged below the hinge support (115), the longitudinal slide rail (121) is installed parallel to the longitudinal axis of the supporting square steel (103), a movable connection hinge (120) is installed on the longitudinal slide rail (121), the movable connection hinge (120) can slide along the longitudinal slide rail (121), the installation direction of the movable connection hinge (120) is consistent with that of the hinge support (115), the hinge support (115) and the movable connection hinge (120) on the supporting square steel (103) should be installed symmetrically facing each other, and the symmetrical hinge support (115) and the movable connection hinge (120) should be installed symmetrically facing each other. A connecting piece (114) is installed, the connecting piece (114) is X-shaped, a connecting hinge (117) is installed at the intersection of the connecting piece (114), the connecting piece (114) can be opened and closed up and down with the connecting hinge (117) as the center, an adjusting hinge (118) is arranged between the connecting hinge (117) and the hinge support (115), the adjusting hinge (118) is collinear up and down and installed on the connecting piece (114) in parallel left and right, an adjusting screw (116) is installed through the connecting piece (114) up and down, the adjusting screw (116) is arranged symmetrically left and right parallel to the supporting square steel (103), an adjusting head (119) is installed at the bottom end of the adjusting screw (116), and the adjusting head (119) is a truncated cone structure that is narrow at the top and wide at the bottom.

4. A support welding device for a steel structure box beam as claimed in claim 3, characterized in that: The welding support mechanism (2) further comprises: a power box (214), the power box (214) being square, the power box (214) being symmetrically arranged with a power gear 1 (212) and a power gear 2 (213), the power gear 1 (212) being located below the power gear 2 (213), the power gear 1 (212) and the power gear 2 (213) being arranged vertically in a colinear manner, the power gear 1 (212) being meshed with a lower rack (210), the lower rack (210) being arranged along the lower edge of the inner wall of the outer shell (201), the power gear 2 (213) being meshed with an upper rack (211), the upper rack (211) being arranged along the upper edge of the inner wall of the outer shell (201), and the lower rack (210) and the upper rack (211) being arranged vertically opposite to each other.

5. A support welding device for a steel structure box beam as claimed in claim 4, characterized in that: The power box (214) moves along the lower rack (210) in the groove of the outer shell (201) under the drive of the power gear 1 (212). A middle rail (209) runs through the middle of the power box (214). The middle rail (209) is a thick-walled pipe groove. A cable (215) passes through the inside of the middle rail (209).

6. A support welding device for a steel structure box beam as claimed in claim 5, characterized in that: The multi-degree-of-freedom mechanical arm (301) is mounted on the lower surface of the outer layer of the power box (214).

7. A welding method for controlling a support welding device of a steel structure box beam according to any one of claims 1 to 6, comprising the following steps: Step a, rotating the adjusting head (119) according to the size of the steel bridge box girder (101) so that the left and right side supporting square steels (103) are separated from each other to a specified distance, and after the supporting square steels (103) are erected, the structure is fixed to the ground using the lower base fixing bolts (105). After each row of supporting square steels (103) is arranged, the connecting square steels (108) are fixed to the connecting angles (106) using the lower connecting bolts (107), so that the front and rear supporting square steels (103) form a whole; Step b, installing the upper base (110) to the top of the supporting square steel (103), inserting the upper connecting bolts (109) into the outer connecting holes (112), and tightening them, and clamping the frame I-beam (102) The welding robot (3) is inserted into the gap of the fixed angle steel (111), and finally the steel bridge box girder (101) to be welded is hoisted to the upper surface of the supporting frame I-beam (102); step c, the welding data is input into the control cabinet (205), the control cabinet (205) issues a command, the power wheel (207) moves along the rail (206), drives the welding robot (3) to arrive at the specified position, the power gear (212) is started, and the power box (214) is driven to move along the lower rack (210) until the welding robot (3) arrives at the specified height, the multi-degree-of-freedom mechanical arm (301) is started, and the welding head (303) is driven to arrive at the welding position, the wire feeder (302) is started, and the welding head (303) starts welding.

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