An automatic welding equipment for main girder web stiffeners

Abstract

The present invention relates to the field of crane manufacturing, and specifically relates to an automatic welding device for reinforcing ribs on the main beam web, which includes a welding track, a loading trolley, a frame, a feeding table, a welding spacing adjustable device, a numerically controlled welding torch, a reinforcing rib limiting device, and an electric control unit. The loading trolley is translatably arranged on the welding track. The bottoms of both sides of the frame are fixedly arranged on the loading trolley. The welding spacing adjustable device is fixedly arranged at the front end of the frame. Both the numerically controlled welding torch and the reinforcing rib limiting device are fixedly arranged at the lower end of the welding spacing adjustable device. The automatic welding device has achieved a breakthrough improvement in automation degree and welding efficiency compared with manual welding, and can flexibly adjust the welding spacing of the reinforcing ribs on the back of the main beam web. The parallelism of the reinforcing rib welding is good, the welding quality is high, and the welding position of the reinforcing rib can be automatically profiled and corrected according to the contour of the main beam web.

Description

Technical Field

[0001] The present invention relates to the field of crane manufacturing, and more specifically to an automatic welding device for reinforcing ribs of a main beam web Background Art

[0002] With the rapid development of China's industrial level and manufacturing capacity, the application scope of cranes has become increasingly extensive. A crane refers to a multi-action lifting machine that vertically lifts and horizontally transports heavy objects within a certain range. Among them, a bridge crane is a type of bridge crane that runs on elevated tracks, also known as an overhead crane. The bridge of the bridge crane runs longitudinally along the tracks laid on both sides of the elevated structure, and the lifting trolley runs transversely along the tracks laid on the bridge, forming a rectangular working range, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment.

[0003] The bridge crane is composed of a main beam and end beams, which are rigidly connected. The structure of the main beam is formed by welding reinforcing ribs and connecting inner vertical plates to two steel plates in the shape of the main beam, that is, the main beam web. During the production and manufacturing process of the main beam, since the main beam web is a thin steel plate about one centimeter thick and has a relatively large length, multiple reinforcing ribs need to be welded in parallel on the inner side wall of the main beam web to increase the strength and stiffness of the main beam web. Currently, the welding of the reinforcing ribs of the main beam web mainly relies on manual welding. The reinforcing ribs are generally angle steels. A single welding worker simply cannot complete the vertical welding of the angle steel, and the welding efficiency is relatively low. Each main beam web requires at least three reinforcing ribs. A welding worker needs at least one day to weld the reinforcing ribs of three main beam lengths, and the labor intensity is relatively high. Welding causes great harm to the human body and is not conducive to safe production; moreover, when manually welding the reinforcing ribs of the main beam web, the welding position of the reinforcing ribs cannot be changed to adapt to the shape of the main beam edge, and only straight-line welding can be performed, which results in poor strength uniformity of the main beam web and inconsistent load-bearing capacities of each part, affecting the product quality of the crane main beam. Therefore, how to overcome the above-mentioned existing technical problems and defects has become a key problem to be solved. Summary of the Invention

[0004] The object of the present invention is to overcome the defects described in the background art, so as to realize an automatic welding device for reinforcing ribs of a main beam web. The automation degree and welding efficiency of this automatic welding device have achieved a breakthrough improvement compared with manual welding, and it can flexibly adjust the welding spacing of the reinforcing ribs on the back of the main beam web. The parallelism of the reinforcing rib welding is good, the welding quality is high, and the welding position of the reinforcing ribs can be automatically profiled and corrected according to the contour of the main beam web, so that the strength uniformity of the main beam web is high and the load-bearing capacities of each part are more consistent.

[0005] To achieve the above-mentioned invention object, the technical solution of the present invention is: an automatic welding device for main beam web stiffeners, comprising welding tracks, a carrying trolley, a frame, a feeding table, a welding spacing adjustable device, a numerical control welding torch, a stiffener limiting device and an electric control unit. The welding tracks are fixedly arranged in parallel on the working plane. The carrying trolley is translatably arranged on the welding tracks. The bottoms of both sides of the frame are fixedly arranged on the carrying trolley. The feeding table is fixedly arranged on the working plane between the welding tracks. The welding spacing adjustable device is fixedly arranged at the front end of the frame. The numerical control welding torch and the stiffener limiting device are both fixedly arranged at the lower end of the welding spacing adjustable device. The operations of the carrying trolley, the welding spacing adjustable device and the numerical control welding torch are coordinately controlled by the electric control unit.

[0006] In the above automatic welding device for main beam web stiffeners, the welding spacing adjustable device comprises an adjustment frame, an adjustment slide rail, a spacing adjustable welding frame and a profiling tracking mechanism. The adjustment frame is fixedly arranged on a support. The adjustment slide rail is horizontally fixedly arranged on the side of the adjustment frame. At least two groups of spacing adjustable link frames are provided, and the spacing adjustable welding frame is slidably arranged on the adjustment slide rail. The bottom of the spacing adjustable welding frame is used for fixedly installing the numerical control welding torch. The profiling tracking mechanism is fixedly arranged on the adjustment frame on one side of the spacing adjustable welding frame and is used for automatically and integrally adjusting the position of the spacing adjustable welding frame on the adjustment slide rail in accordance with the shape of the main beam web edge, so as to realize automatically and integrally adjusting the welding position of the spacing adjustable welding frame. The operations of the profiling tracking mechanism and the spacing adjustable welding frame are controlled by the electric control unit.

[0007] In the above automatic welding device for main beam web stiffeners, the spacing adjustable welding frame comprises a welding bearing plate, an adjustment lead screw, an adjustment nut and an adjustment drive. An adjustment slider for sliding cooperation with the adjustment slide rail is fixedly arranged on the back of the welding bearing plate. Adjustment nuts are fixedly arranged on adjacent two welding bearing plates, and an adjustment lead screw is installed in cooperation between the adjustment nuts. The adjustment drive is an adjustment handwheel adjusted manually or an adjustment motor driven by a servo motor, and the adjustment drive is fixedly arranged on the welding bearing plate.

[0008] In the above-mentioned automatic welding equipment for the main beam web stiffeners, the profiling and tracking mechanism includes a tracking carrier plate, a tracking sensor, a tracking motor, a tracking nut, and a tracking lead screw. The tracking carrier plate is slidably arranged on the adjustment slide rail through an adjustment slider fixedly arranged on the back. The tracking sensor is fixedly arranged below the tracking carrier plate and on the side of the main beam web to be welded. The tracking motor is fixedly arranged between the adjustment tracks at the end of the adjustment frame. The tracking nut is fixedly arranged on the side wall of the tracking carrier plate. The tracking lead screw is installed in cooperation with the tracking nut, and the end of the tracking lead screw is fixedly connected to the output shaft of the tracking motor. The adjustment drive and the adjustment nut at the outermost end of the spacing-adjustable welding frame are fixedly arranged on the side wall of the tracking carrier plate.

[0009] In the above-mentioned automatic welding equipment for the main beam web stiffeners, the tracking sensor includes a sensing support beam, a beading wheel, and a travel sensor. The top of the sensing support beam is fixedly arranged at the lower part of the tracking carrier plate. The travel sensor is vertically fixedly arranged at the lower end of the sensing support beam. The beading wheel is fixedly arranged on the movable rod of the travel sensor. The beading wheel is close to the edge of the main beam web to be welded.

[0010] In the above-mentioned automatic welding equipment for the main beam web stiffeners, the carrying trolley includes a trolley body, track wheels, a driving rack, and a translation motor. The track wheels are fixedly arranged at both ends of the trolley body through bearings. The bottoms on both sides of the frame are fixedly arranged on the top of the trolley body. The driving rack is fixedly arranged on the side of the carrying track. The translation motor is fixedly arranged in the middle of the trolley body, and a translation gear meshing with the driving rack is installed on the output shaft of the translation motor. The operation of the translation motor is controlled by an electronic control unit.

[0011] In the above-mentioned automatic welding equipment for the main beam web stiffeners, the stiffener limiting device includes a side limiting mechanism and a top limiting mechanism. The side limiting mechanism is fixedly arranged on the rear side wall at the bottom end of the welding carrier plate. The top limiting mechanism is fixedly arranged on the front side wall at the bottom end of the welding carrier plate. The side limiting mechanism is used to make the stiffener stand on the main beam web, and the top limiting mechanism is used to always press the stiffener against the main beam web, facilitating the welding of the stiffener.

[0012] In the above-mentioned automatic welding equipment for the main beam web stiffeners, the side limiting mechanism includes an L-shaped beam, a limiting wheel, and a limiting wheel support plate. There are two L-shaped beams, which are detachably arranged on the rear side wall at the bottom end of the welding carrier plate through fasteners. The limiting wheel support plate is fixedly arranged at the rear end of the L-shaped beam. The limiting wheel is fixedly arranged on the limiting wheel support plate through a wheel shaft. The space between the limiting wheels is for the main beam web stiffeners to pass through, so that the main beam web stiffeners can be welded standing.

[0013] In the above-mentioned automatic welding equipment for the main girder web stiffeners, the top limiting mechanism includes a fixed ejector rod, a movable ejector rod, and a pressing wheel. The fixed ejector rod is fixedly installed on the front side wall of the bottom of the welding carrier plate. The fixed ejector rod and the movable ejector rod are of a linear cylinder structure. The fixed ejector rod is the cylinder barrel, and the movable ejector rod is the piston rod. The inner cavity of the fixed ejector rod is externally connected to a high-pressure air source to provide a downward pre-pressure to the movable ejector rod. The pressing wheel is fixedly arranged at the bottom end of the movable ejector rod.

[0014] In the above-mentioned automatic welding equipment for the main girder web stiffeners, a scale is fixedly arranged on the adjusting frame between the adjusting slide rails in parallel with the adjusting slide rails. The scale is located between the adjusting frame and the welding frame with adjustable spacing, and can provide precise dimensional reference when adjusting the spacing between adjacent two welding carrier plates.

[0015] The beneficial effects of the automatic welding equipment for the main girder web stiffeners of the present invention:

[0016] 1. The automatic welding equipment for the main girder web stiffeners of the present invention can achieve numerically controlled full-automatic welding without manual intervention, with extremely high automation. Moreover, it can synchronously weld multiple stiffeners, which is 3 - 5 times faster than manual welding one by one, achieving a breakthrough improvement in welding efficiency compared with manual welding. At the same time, it greatly reduces the labor intensity of workers, ensures the physical health of workers, and is conducive to promoting safe production.

[0017] 2. The automatic welding equipment for the main girder web stiffeners of the present invention is provided with a welding frame with adjustable spacing on the adjusting frame, which can flexibly adjust the welding spacing of the stiffeners on the back of the main girder web, and the spacing of the stiffeners is always consistent, with good parallelism of the stiffener welding, which helps to improve the welding quality of the main girder web stiffeners.

[0018] 3. The automatic welding equipment for the main girder web stiffeners of the present invention is provided with a profiling tracking mechanism, which can automatically profile and correct the welding position of the stiffeners according to the contour of the main girder web, so that the welding position of the stiffeners is corrected following the contour shape of the main girder web, thereby achieving the purpose of high uniformity of the strength of the main girder web and more consistent load-bearing capacity of each part, and significantly improving the mechanical properties of the welded main girder web. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the automatic welding equipment for the main girder web stiffeners of the present invention;

[0020] Figure 2 is Figure 1 the right view structural diagram of

[0021] Figure 3 is a schematic structural diagram of the welding spacing adjustable device;

[0022] Figure 4 isFigure 3 Schematic cross-sectional structure diagram along A-A in

[0023] Figure 5 is Figure 1 Enlarged structure diagram of B in

[0024] Figure 6 is Figure 2 Enlarged structure diagram of C in

[0025] Figure 7 It is a schematic diagram of the end face of the welded finished product of the main girder web stiffener.

[0026] In the figure: 1-frame, 2-loading table, 3-welding track;

[0027] 4-bearing trolley, 401-trolley body, 402-rail wheel, 403-driving rack, 404-translation motor;

[0028] 5-welding spacing adjustable device, 501-adjusting frame, 502-adjusting slide rail;

[0029] 503-spacing adjustable welding frame, 531-welding bearing plate, 532-adjusting lead screw, 533-adjusting nut, 534-adjusting drive;

[0030] 504-profile tracking mechanism, 541-tracking bearing plate, 542-tracking sensor, 543-tracking motor, 544-tracking nut, 545-tracking lead screw;

[0031] 5421-sensing support beam, 5422-hem wheel, 5423-travel sensor;

[0032] 6-stiffener limiting device;

[0033] 601-side limiting mechanism, 611-L-shaped beam, 612-limiting wheel, 613-limiting wheel support plate;

[0034] 602-top limiting mechanism, 621-fixed ejector rod, 622-movable ejector rod, 623-pressing wheel;

[0035] 7-scale, 8-numerical control welding torch, 9-main girder web, 10-stiffener. Specific implementation mode

[0036] The automatic welding equipment for the main girder web stiffener of the present invention will be described in more detail below in conjunction with the accompanying drawings and through specific implementation modes.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] See Figure 1 and Figure 2 For the automatic welding equipment for the main girder web stiffeners of this embodiment, it includes welding tracks, a carrying trolley, a frame, a feeding table, a welding spacing adjustable device, a numerical control welding torch, a stiffener limiting device, and an electric control unit. The welding tracks are fixedly arranged in parallel on the working plane. The carrying trolley is translatably arranged on the welding tracks. The bottoms of both sides of the frame are fixedly arranged on the carrying trolley. The feeding table is fixedly arranged on the working plane between the welding tracks. The welding spacing adjustable device is fixedly arranged at the front end of the frame. The numerical control welding torch and the stiffener limiting device are both fixedly arranged at the lower end of the welding spacing adjustable device. The operations of the carrying trolley, the welding spacing adjustable device, and the numerical control welding torch are all coordinated and controlled by the electric control unit. The electric control unit is controlled by an industrial control computer or a single-chip microcomputer control technology, which is a mature existing technology and will not be elaborated here.

[0039] In this embodiment, see Figure 3 and Figure 4 The welding spacing adjustable device includes an adjustment frame, an adjustment slide rail, a spacing adjustable welding frame, and a profiling tracking mechanism. The adjustment frame is fixedly arranged on a support. The adjustment slide rail is horizontally fixedly arranged on the side of the adjustment frame. At least two groups of spacing adjustable link frames are provided, and the spacing adjustable welding frame is slidably arranged on the adjustment slide rail. The bottom of the spacing adjustable welding frame is used for fixedly installing the numerical control welding torch. The profiling tracking mechanism is fixedly arranged on the adjustment frame on one side of the spacing adjustable welding frame, and is used to automatically adjust the position of the spacing adjustable welding frame on the adjustment slide rail as a whole by imitating the shape of the main girder web edge, so as to realize the automatic adjustment of the welding position of the spacing adjustable welding frame as a whole. The operations of the profiling tracking mechanism and the spacing adjustable welding frame are controlled by the electric control unit.

[0040] In order to increase the displacement accuracy between adjacent welding bearing plates, referring to Figure 3 In this embodiment, a scale is fixedly arranged on the adjustment frame between the adjustment slide rails and parallel to the adjustment slide rails. The scale is located between the adjustment frame and the spacing adjustable welding frame, and can provide a precise dimension reference when adjusting the spacing between two adjacent welding bearing plates.

[0041] In this embodiment, see Figure 3, the spacing-adjustable welding frame includes a welding bearing plate, an adjustment lead screw, an adjustment nut, and an adjustment drive. An adjustment slider that cooperates with and slides on the adjustment slide rail is fixedly provided on the back of the welding bearing plate. Adjustment nuts are fixedly provided on adjacent welding bearing plates, and the adjustment lead screw is installed in cooperation between the adjustment nuts. The adjustment drive is an adjustment handwheel adjusted manually or an adjustment motor driven by a servo motor, and the adjustment drive is fixedly provided on the welding bearing plate.

[0042] See Figure 3 and Figure 4 , in this embodiment, the profiling tracking mechanism includes a tracking bearing plate, a tracking sensor, a tracking motor, a tracking nut, and a tracking lead screw. The tracking bearing plate is slidably provided on the adjustment slide rail through an adjustment slider fixedly provided on the back. The tracking sensor is fixedly provided below the tracking bearing plate and on the side of the main beam web to be welded. The tracking motor is fixedly provided between the adjustment tracks at the end of the adjustment frame. The tracking nut is fixedly provided on the side wall of the tracking bearing plate. The tracking lead screw is installed in cooperation with the tracking nut, and the end of the tracking lead screw is fixedly connected to the output shaft of the tracking motor; the adjustment drive and the adjustment nut at the outermost end of the spacing-adjustable welding frame are fixedly provided on the side wall of the tracking bearing plate. The tracking sensor includes a sensing support beam, a flanging wheel, and a travel sensor. The top of the sensing support beam is fixedly provided at the lower part of the tracking bearing plate, the travel sensor is vertically fixedly provided at the lower end of the sensing support beam, and the flanging wheel is fixedly provided on the movable rod of the travel sensor. The flanging wheel is close to the edge of the main beam web to be welded.

[0043] In this embodiment, see Figure 1 and Figure 2 , the carrying trolley includes a trolley body, rail wheels, a driving rack, and a translation motor. The rail wheels are fixedly provided at both ends of the trolley body through bearings. The bottoms on both sides of the frame are fixedly provided on the top of the trolley body. The driving rack is fixedly provided on the side of the carrying track. The translation motor is fixedly provided in the middle of the trolley body, and a translation gear meshing with the driving rack is installed on the output shaft of the translation motor. The operation of the translation motor is controlled by an electronic control unit.

[0044] See Figure 1 and Figure 2 , Figure 5 and Figure 6 , in this embodiment, the stiffener limiting device includes a side limiting mechanism and a top limiting mechanism. The side limiting mechanism is fixedly provided on the rear side wall at the bottom of the welding bearing plate, and the top limiting mechanism is fixedly provided on the front side wall at the bottom of the welding bearing plate. The side limiting mechanism is used to make the stiffener stand on the main beam web, and the top limiting mechanism is used to always press the stiffener against the main beam web to facilitate the welding of the stiffener.

[0045] In this embodiment, refer to Figure 5 and Figure 6 , the side limiting mechanism includes an L-shaped beam, a limiting wheel and a limiting wheel support plate. There are two L-shaped beams, which are detachably arranged on the rear side wall of the bottom end of the welding bearing plate through fasteners. The limiting wheel support plate is fixedly arranged at the rear end of the L-shaped beam. The limiting wheel is fixedly arranged on the limiting wheel support plate through a wheel shaft. The space between the limiting wheels is for the main beam web stiffener to pass through, so that the main beam web stiffener can be vertically welded. The top limiting mechanism includes a fixed ejector rod, a movable ejector rod and a pressing wheel. The fixed ejector rod is fixedly installed on the front side wall of the bottom of the welding bearing plate. The fixed ejector rod and the movable ejector rod are of a linear cylinder structure. The fixed ejector rod is the cylinder barrel and the movable ejector rod is the piston rod. The inner cavity of the fixed ejector rod is externally connected to a high-pressure air source to provide a downward pre-pressure for the movable ejector rod. Of course, the fixed rod and the movable rod of the top limiting mechanism can also be replaced by a linear guide cylinder. The pressing wheel is fixedly arranged at the bottom end of the movable ejector rod, and the pressing wheel tightly presses on the top of the stiffening angle steel during operation.

[0046] The working principle of the automatic welding equipment for the main beam web stiffener of the present invention:

[0047] First, place the main girder web plate with the initial welding ends of the stiffeners pre-spot welded on the material feeding table. The electronic control unit controls the carrier trolley to drive the frame to move on the welding track, so that the welding spacing adjustable device is translated to the initial welding end of the stiffener to be welded at the end of the main girder web plate. According to the positions of the stiffeners pre-spot welded on the main girder web plate, adjust the position of the welding carrier plate according to the following method: Starting from the rightmost welding carrier plate, adjust the adjustment drive on the tracking carrier plate of the adjacent profiling tracking mechanism to drive the adjustment lead screw to rotate. As a result, the rightmost welding carrier plate is translated along the adjustment slide rail driven by the adjustment nut to align it with the stiffener of the rightmost main girder web plate. Then, use the same method to sequentially adjust the adjacent left welding carrier plates to align the welding carrier plates with the corresponding stiffeners of the main girder web plate, and determine the welding positions of the welding carrier plates on the adjustment slide rail. The angle steel stiffeners only play a role in strengthening the main girder web plate and are not subject to impact loads themselves. Therefore, only the single-sided section needs to be welded. When starting to weld the stiffeners of the main girder web plate, the profiling tracking mechanism drives the tracking lead screw through the tracking motor to move the tracking carrier plate on the adjustment slide rail, so that the edge rolling wheel of the tracking sensor abuts against the edge of the main girder web plate. When welding, the electronic control unit controls the translation motor of the carrier trolley to work, so that it drives the translation gear to engage and transmit on the driving rack, thereby driving the frame and the welding spacing adjustable device to translate and weld above the main girder web plate along the welding track. At this time, the edge rolling wheel rolls along the edge of the main girder web plate. When there is a non-linear change in the edge of the main girder web plate, the edge rolling wheel moves against the movable rod of the stroke sensor to generate a displacement signal. After the displacement signal is fed back to the electronic control unit, the electronic control unit controls the forward and reverse rotation of the tracking motor to perform profiling adjustment of the position of the tracking carrier plate on the adjustment slide rail according to the shape of the edge of the main girder web plate, so that the welded stiffeners match the shape of the main girder web plate, achieving the purpose of high uniformity of the strength of the main girder web plate and more consistent load-bearing capacity of each part, and realizing the full-automatic welding of the stiffeners of the main girder web plate. The welding efficiency and quality have achieved a breakthrough improvement compared with manual welding.

[0048] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which this invention belongs. As used in the specification and claims of this application, words such as "a" or "an" do not necessarily denote a limitation of quantity. Words such as "comprising" or "including" mean that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0049] The exemplary embodiments of the present invention have been described in detail above with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present invention, various modifications and variations can be made to the above specific embodiments, and various combinations can be made to the technical features and structures proposed by the present invention, without exceeding the protection scope of the present invention.

Claims

1. An automatic welding device for the web stiffeners of a main girder, characterized in that: It includes welding tracks, a carrying trolley, a frame, a loading table, a welding spacing adjustable device, a numerical control welding torch, a stiffener limiting device and an electric control unit. The welding tracks are fixedly arranged in parallel on the working plane. The carrying trolley is translatably arranged on the welding tracks. The bottoms of both sides of the frame are fixedly arranged on the carrying trolley. The loading table is fixedly arranged on the working plane between the welding tracks. The welding spacing adjustable device is fixedly arranged at the front end of the frame. Both the numerical control welding torch and the stiffener limiting device are fixedly arranged at the lower end of the welding spacing adjustable device. The operations of the carrying trolley, the welding spacing adjustable device and the numerical control welding torch are coordinately controlled by the electric control unit; The welding spacing adjustable device includes an adjustment frame, an adjustment slide rail, a spacing adjustable welding frame and a profiling and tracking mechanism. The adjustment frame is fixedly arranged on a support. The adjustment slide rail is horizontally fixedly arranged on the side of the adjustment frame. At least two groups of spacing adjustable link frames are provided, and the spacing adjustable welding frame is slidably arranged on the adjustment slide rail. The bottom of the spacing adjustable welding frame is used for fixedly installing the numerical control welding torch. The profiling and tracking mechanism is fixedly arranged on the adjustment frame on one side of the spacing adjustable welding frame and is used for automatically and integrally adjusting the position of the spacing adjustable welding frame on the adjustment slide rail according to the shape of the edge of the main girder web, so as to realize automatically and integrally adjusting the welding position of the spacing adjustable welding frame. The operations of the profiling and tracking mechanism and the spacing adjustable welding frame are controlled by the electric control unit; The spacing adjustable welding frame includes a welding bearing plate, an adjustment lead screw, an adjustment nut and an adjustment drive. An adjustment slider for cooperating with the adjustment slide rail is fixedly arranged on the back of the welding bearing plate. Adjustment nuts are fixedly arranged on adjacent two welding bearing plates, and the adjustment lead screw is cooperatively installed between the adjustment nuts. The adjustment drive is an adjustment handwheel adjusted manually or an adjustment motor driven by a servo motor, and the adjustment drive is fixedly arranged on the welding bearing plate; The profiling and tracking mechanism includes a tracking bearing plate, a tracking sensor, a tracking motor, a tracking nut and a tracking lead screw. The tracking bearing plate is slidably arranged on the adjustment slide rail through an adjustment slider fixedly arranged on the back. The tracking sensor is fixedly arranged below the tracking bearing plate and on the side of the main girder web to be welded. The tracking motor is fixedly arranged between the adjustment tracks at the end of the adjustment frame. The tracking nut is fixedly arranged on the side wall of the tracking bearing plate. The tracking lead screw is cooperatively installed with the tracking nut, and the end of the tracking lead screw is fixedly connected with the output shaft of the tracking motor. The adjustment drive and the adjustment nut at the outermost end of the spacing adjustable welding frame are fixedly arranged on the side wall of the tracking bearing plate; The tracking sensor includes a sensing support beam, a hemming wheel and a travel sensor. The top of the sensing support beam is fixedly arranged on the lower part of the tracking bearing plate. The travel sensor is vertically fixedly arranged at the lower end of the sensing support beam. The hemming wheel is fixedly arranged on the movable rod of the travel sensor, and the hemming wheel is close to the edge of the main girder web to be welded; A scale is fixedly arranged on the adjustment frame between the adjustment slide rails and is parallel to the adjustment slide rails. The scale is located between the adjustment frame and the spacing adjustable welding frame.

2. The automatic welding equipment for the main beam web stiffener according to claim 1, characterized in that: The carrier trolley includes a trolley body, rail wheels, a driving rack, and a translation motor. The rail wheels are fixedly arranged at both ends of the trolley body through bearings. The bottoms on both sides of the frame are fixedly arranged on the top of the trolley body. The driving rack is fixedly arranged on the side of the carrying track. The translation motor is fixedly arranged in the middle of the trolley body, and a translation gear meshing with the driving rack is installed on the output shaft of the translation motor. The operation of the translation motor is controlled by an electronic control unit.

3. The automatic welding equipment for the main beam web stiffener according to claim 1, characterized in that: The stiffener limiting device includes a side limiting mechanism and a top limiting mechanism. The side limiting mechanism is fixedly arranged on the rear side wall at the bottom of the welding bearing plate, and the top limiting mechanism is fixedly arranged on the front side wall at the bottom of the welding bearing plate. The side limiting mechanism is used to make the stiffener stand on the main girder web, and the top limiting mechanism is used to always press the stiffener against the main girder web, facilitating the welding of the stiffener.

4. The automatic welding equipment for the main beam web stiffener according to claim 3, characterized in that: The side limiting mechanism includes an L-shaped beam, a limiting wheel, and a limiting wheel support plate. There are two L-shaped beams, which are detachably arranged on the rear side wall at the bottom of the welding bearing plate through fasteners. The limiting wheel support plate is fixedly arranged at the rear end of the L-shaped beam. The limiting wheel is fixedly arranged on the limiting wheel support plate through a wheel shaft. The space between the limiting wheels is for the main girder web stiffener to pass through, so that the main girder web stiffener can be welded standing.

5. The automatic welding equipment for the main beam web stiffener according to claim 3, characterized in that: The top limiting mechanism includes a fixed ejector rod, a movable ejector rod, and a pressing wheel. The fixed ejector rod is fixedly installed on the front side wall at the bottom of the welding bearing plate. The fixed ejector rod and the movable ejector rod are of a linear cylinder structure. The fixed ejector rod is the cylinder barrel, and the movable ejector rod is the piston rod. The inner cavity of the fixed ejector rod is externally connected to a high-pressure air source to provide a downward pre-pressure for the movable ejector rod. The pressing wheel is fixedly arranged at the bottom end of the movable ejector rod.

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