Bailey plate automatic transfer welding device, welding process and pre-arch Bailey steel bridge

Abstract

The present invention relates to the technical field related to welding tooling, and specifically to an automatic Bailey plate transfer welding device, a welding process and a pre-arch Bailey steel bridge. The automatic Bailey plate transfer welding device comprises a workbench, two vertical plates arranged on the workbench and a horizontal platform arranged between the two vertical plates. The horizontal platform is provided with a plurality of limit blocks for positioning upper and lower chord rods, vertical rods and diagonal rods, so that the upper and lower chord rods, vertical rods and diagonal rods form a frame to be welded on the horizontal platform. During welding, the material of the Bailey plate can be fixed to form a stable frame to be welded through the mutual cooperation between various mechanisms and components, which is convenient for welding. The welding device is highly convenient, saves time and labor, and during the welding process, the frame to be welded is directly welded after it is formed, thereby avoiding the problem of large position size differences caused by the patchwork welding method, having higher accuracy and being suitable for popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field related to welding tooling, and in particular to an automatic Bailey sheet transfer welding device, a welding process and a pre-arched Bailey steel bridge. Background Art

[0002] It is widely used in construction projects such as highways, railways, municipal administration, buildings, water conservancy, etc., lifting and moving prefabricated components in bridge construction prefabrication sites, transporting beams beside bridge piers, and other on-site construction operations. Bailey plates are welded from upper and lower chords, vertical rods and diagonal rods. The welding work needs to be strictly controlled to avoid differences in position and size, which will affect its stability in actual application.

[0003] Nowadays, when welding, workers usually weld parts into a unit first and then weld the units into a whole. This patchwork welding method is troublesome to operate, and workers need to adjust the position of materials many times, which is time-consuming and labor-intensive. On the other hand, this welding method has a low fault tolerance rate. When welding between components and units, it is easy to cause deviations in the docking of the welding position, which in turn affects the subsequent performance of the Bailey sheet. Summary of the invention

[0004] The object of the present invention is to provide an automatic Bailey plate transfer welding device, a welding process and a pre-arched Bailey steel bridge to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The Bailey sheet automatic transfer welding device comprises a workbench, two vertical plates arranged on the workbench, and a horizontal platform arranged between the two vertical plates, wherein the horizontal platform is provided with a plurality of limit blocks for positioning the upper and lower chord rods, the vertical rods and the diagonal rods, so that the upper and lower chord rods, the vertical rods and the diagonal rods form a frame to be welded on the horizontal platform;

[0007] The Bailey sheet automated transfer welding device also includes:

[0008] A first fastening mechanism, two groups of which are provided between the workbench and the horizontal table, the first fastening mechanism being used to cooperate with the limit block to fix the upper and lower chord rods and the vertical rods on both sides, and the two groups of the fastening mechanism are connected to the transverse movement mechanism installed between the two vertical plates;

[0009] A second fastening mechanism, one set of which is provided on each side of the two vertical plates facing the horizontal platform, the second fastening mechanism is used to fix the oblique rod and the central vertical rod, and the second fastening mechanism is also connected to a transposition mechanism installed on the vertical plates;

[0010] The transverse movement mechanism can successively drive the first fastening mechanism and the second fastening mechanism to perform fixing actions so as to perform a welding operation, and then can prompt the first fastening mechanism to release the fixing, and prompt the transposition mechanism to drive the Bailey plate to rise and flip over so as to perform a secondary welding operation.

[0011] As a further solution of the present invention: the horizontal platform is provided with four groups of guide grooves, and two sliders are slidably engaged in each group of the guide grooves, a first limiting column is provided on the slider, and a driven plate is fixedly connected between the two sliders;

[0012] The first fastening mechanism includes a driving plate slidably arranged at the bottom of the horizontal platform and capable of moving along the width direction of the horizontal platform, and a transmission plate fixed to the driving plate, two transmission grooves are arranged on the transmission plate, and a pulley is respectively provided at both ends of the driving plate, and the pulley is rollingly engaged in a groove arranged on the driven plate.

[0013] As a further solution of the present invention: the transverse movement mechanism includes two threaded sleeves and two follower sleeves movably arranged under the horizontal platform through a threaded driving member, and driving columns are provided on the threaded sleeves and the follower sleeves, and the two are fixed by a connecting frame, the driving column extends into the transmission groove and is slidably connected to the transmission plate, and the transmission groove includes a first inclined section, a first straight section, a second inclined section and a second straight section connected in sequence.

[0014] As a further solution of the present invention: the second fastening mechanism includes an assembly plate connected to the shifting mechanism, a one-way screw rotatably mounted on the assembly plate, and a driving tube sleeved on the one-way screw and threadedly connected to the one-way screw, a gear is rotatably mounted on the assembly plate, the one-way screw is connected to the rotating shaft of the gear through a second transmission belt, and the threaded sleeve is fixedly connected to a rack plate matched with the gear;

[0015] Among them, a guide plate is provided on the assembly plate through two connecting columns, four movable parts are slidably provided on the guide plate, a second limiting column is provided on the movable part, and the movable part is connected with a kit slidably provided on the connecting column through a push-pull rod, and the two ends of the push-pull rod are respectively hinged to the kit and the movable part, and the kit is fixed to the driving tube.

[0016] As a further solution of the present invention: a lifting block is slidably engaged on the vertical plate, a rotating shaft fixed to the assembly plate is rotatably mounted on the lifting block, the rotating shaft is connected to a follow-up trigger structure, the lifting block is connected to the shifting mechanism, and the shifting mechanism is connected to the follow-up sleeve.

[0017] As a further solution of the present invention: the shifting mechanism includes two rotating wheels rotatably installed on the sides of the vertical plate, a connecting piece connecting the two rotating wheels and a cylinder arranged on the connecting piece, the lifting block is fixedly connected to a transmission rod, the transmission rod is provided with a groove adapted to the cylinder, the cylinder passes through the groove and is slidably connected to the transmission rod, the connecting piece rolls with the two rotating wheels, and the rotating shaft of one of the rotating wheels is connected to the follower sleeve through a transmission structure.

[0018] As a further solution of the present invention: the transmission structure includes a driven shaft rotatably mounted on the vertical plate and slidingly engaged with the follower sleeve, a first protrusion is provided on the inner wall of the follower sleeve, the first protrusion extends into a groove body provided on the outer wall of the driven shaft and is slidably connected to the driven shaft, the groove body includes connected axial grooves and spiral grooves, and the driven shaft is connected to the rotating shaft of the rotating wheel through a first transmission belt.

[0019] As a further solution of the present invention: the follow-up trigger structure includes a driven tube rotatably mounted on the lifting block and a limiting column fixedly mounted on the side of the vertical plate, the driven tube is connected to the rotating shaft through a bevel gear set, and a second protrusion is provided on the inner wall of the driven tube, and a limiting groove adapted to the second protrusion is provided on the outer wall of the limiting column, the second protrusion extends into the limiting groove and is slidably connected to the limiting column, and the limiting groove includes a connected vertical groove and a curved groove.

[0020] The Bailey sheet welding process, using the above-mentioned Bailey sheet automatic transfer welding device, includes the following steps:

[0021] Step 1: Place the upper and lower chords, vertical bars and diagonal bars on the horizontal table with reference to the plurality of limit blocks to form a frame to be welded;

[0022] Step 2: The transverse movement mechanism works forward, firstly, the first fastening mechanism cooperates with the limit block to fix the upper and lower chord rods and the vertical rods on both sides, and then the second fastening mechanism cooperates with the limit block to fix the diagonal rod and the central vertical rod;

[0023] Step 3: the traverse mechanism stops working and a welding process is performed using a welding tool;

[0024] Step 4: After the welding process is completed, the lateral movement mechanism continues to move, firstly prompting the first fastening mechanism to release the fixing state of the upper and lower chord rods and the vertical rods on both sides, and the transposition mechanism is triggered to drive the frame to rise and turn over;

[0025] Step 5: the lateral movement mechanism stops working and a secondary welding process is performed using a welding tool;

[0026] Step 6. After welding is completed, the transverse movement mechanism works in the reverse direction to reset the components and remove the Bailey sheet on the transverse platform.

[0027] The pre-arch Bailey steel bridge is formed by welding using any of the Bailey plate automated transfer welding devices described above.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is novel in design. During welding, through the mutual cooperation between various mechanisms and components, the material of the Bailey sheet can be fixed to form a stable frame to be welded, which is convenient for welding and avoids the displacement of materials during welding and causes irregularities in the finished product. In addition, after the welding of one side is completed, the first fastening mechanism can release the fixed state of the material, and the displacement mechanism drives the second fastening mechanism to drive the Bailey sheet to rise and flip, thereby realizing the automatic transfer welding function. Therefore, the present welding device is highly convenient and saves time and effort. During the welding process, the frame to be welded is directly welded into shape after it is formed, thereby avoiding the problem of large position and size differences caused by the patchwork welding method. The device has higher accuracy and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The isometric view of an embodiment of the Bailey sheet automated transfer welding device.

[0030] Figure 2 The present invention is a schematic structural diagram of an embodiment of an automatic transfer welding device for Bailey sheets.

[0031] Figure 3 This is a schematic structural diagram from another angle of an embodiment of a Bailey sheet automated transfer welding device.

[0032] Figure 4 This is a structural schematic diagram from another angle of an embodiment of the Bailey sheet automated transfer welding device.

[0033] Figure 5 for Figure 3 A magnified view of the structure at center.

[0034] Figure 6 This is a schematic diagram of the structure of the second fastening mechanism in one embodiment of the Bailey sheet automated transfer welding device.

[0035] Figure 7 for Figure 6 Schematic diagram of the structure from another angle.

[0036] Figure 8 The present invention is a schematic diagram of the structure of the transverse movement mechanism in one embodiment of the Bailey sheet automatic transfer welding device.

[0037] Fig. 9 This is a structural exploded diagram of the first fastening mechanism in an embodiment of the Bailey sheet automated transfer welding device.

[0038] Fig.10 for Fig. 9 Schematic diagram of the structure from another angle.

[0039] In the figure: 1, workbench; 2, vertical plate; 3, horizontal table; 301, limit block; 4, slider; 401, first limit column; 5, driven plate; 501, guide rail; 6, driving plate; 601, pulley; 7, transmission plate; 701, first inclined section; 702, first straight section; 703, second inclined section; 704, second straight section; 8, driving motor; 9, bidirectional screw rod; 10, driving column; 11, threaded sleeve; 12, follower sleeve; 13, connecting frame; 14, rack plate; 15, driven shaft; 1501, axial groove; 1502, Spiral groove; 16, first transmission belt; 17, rotating wheel; 18, connecting piece; 1801, cylinder; 19, lifting block; 20, transmission rod; 2001, notch; 21, limiting column; 2101, vertical groove; 2102, curved groove; 22, driven tube; 23, bevel gear set; 24, assembly plate; 25, gear; 26, second transmission belt; 27, one-way screw; 28, driving tube; 29, connecting column; 30, kit; 31, push-pull rod; 32, guide plate; 33, movable part; 3301, second limiting column; 34, rotating shaft. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0042] See also Figures 1 to 10 In an embodiment of the present invention, the Bailey sheet automatic transfer welding device comprises a workbench 1, two vertical plates 2 arranged on the workbench 1, and a horizontal platform 3 arranged between the two vertical plates 2, wherein the horizontal platform 3 is provided with a plurality of limit blocks 301 for positioning the upper and lower chord rods, the vertical rods and the diagonal rods, so that the upper and lower chord rods, the vertical rods and the diagonal rods form a frame to be welded on the horizontal platform 3;

[0043] It should be noted that in actual operation, the staff needs to refer to the positions of the multiple limit blocks 301, place the materials to be welded (i.e., the upper and lower chords, vertical bars and diagonal bars) on the horizontal table 3, and ensure that the materials fit the limit blocks 301. At this time, a preliminary Bailey sheet frame is formed.

[0044] The Bailey sheet automated transfer welding device also includes:

[0045] A first fastening mechanism and a second fastening mechanism, wherein two groups of the first fastening mechanism are provided between the workbench 1 and the horizontal platform 3, the first fastening mechanism is used to cooperate with the limit block 301 to fix the upper and lower chord rods and the vertical rods on both sides, and the two groups of the fastening mechanism are connected to the transverse movement mechanism installed between the two vertical plates 2, and the second fastening mechanism is provided with one group on each side of the two vertical plates 2 facing the horizontal platform 3, and the second fastening mechanism is used to fix the oblique rod and the central vertical rod, and the second fastening mechanism is also connected to the transposition mechanism installed on the vertical plate 2;

[0046] Specifically, the transverse movement mechanism can successively drive the first fastening mechanism and the second fastening mechanism to perform a fixing action so as to perform a welding operation, and then can prompt the first fastening mechanism to release the fixation, and prompt the transposition mechanism to drive the Bailey plate to rise and flip over so as to perform a secondary welding operation.

[0047] After the frame to be welded is formed, the transverse movement mechanism works, firstly triggering the first fastening mechanism, which cooperates with the limit block 301 to apply pressure to the upper and lower chord rods and the vertical rods on both sides, so that the upper and lower chord rods and the vertical rods on both sides are fixed, and then the second fastening mechanism is triggered to apply pressure to the oblique rod and the central vertical rod, so that the frame to be welded is stabilized as a whole, and the welding tool can be used for one welding;

[0048] After the first welding is completed, the transverse movement mechanism continues to work, firstly prompting the first fastening mechanism to release the fixing state of the material, and the second fastening mechanism to keep the fixing state of the material, then the position change mechanism is triggered, and the position change mechanism drives the second fastening mechanism to drive the Bailey sheet to rise and turn over, so as to perform the second welding;

[0049] In summary, during welding, through the mutual cooperation between various mechanisms and components, the material of the Bailey sheet can be fixed to form a stable frame to be welded, which is convenient for welding and avoids the displacement of materials during welding, resulting in irregular finished products. In addition, after the welding of one side is completed, the first fastening mechanism can release the fixed state of the material, and the displacement mechanism drives the second fastening mechanism to drive the Bailey sheet to rise and flip, thereby realizing the automatic transfer welding function. Therefore, the welding device is highly convenient and saves time and effort. During the welding process, the frame to be welded is formed and then directly welded to shape, thereby avoiding the problem of large position and size differences caused by the patchwork welding method. It has higher accuracy and is suitable for popularization and use.

[0050] Please refer again Figure 8 , Fig. 9 as well as Fig.10 , four groups of guide grooves are provided on the horizontal platform 3, and two sliders 4 are slidably engaged in each group of the guide grooves, a first limiting column 401 is provided on the slider 4, and a driven plate 5 is fixedly connected between the two sliders 4; the first fastening mechanism includes a driving plate 6 slidably arranged at the bottom of the horizontal platform 3 and capable of moving along the width direction of the horizontal platform 3, and a transmission plate 7 fixed to the driving plate 6, two transmission grooves are provided on the transmission plate 7, and a pulley 601 is respectively provided at both ends of the driving plate 6, and the pulley 601 is rollingly engaged in a groove 501 provided on the driven plate 5. The transverse movement mechanism includes two threaded sleeves 11 and two follower sleeves 12 which are movably arranged under the horizontal platform 3 through a threaded driving member. A driving column 10 is provided on each of the threaded sleeves 11 and the follower sleeves 12, and the two are fixed by a connecting frame 13. The driving column 10 extends into the transmission groove and is slidably connected to the transmission plate 7. The transmission groove includes a first inclined section 701, a first straight section 702, a second inclined section 703 and a second straight section 704 which are connected in sequence.

[0051] In detail, the threaded drive component includes a bidirectional screw rod 9 rotatably installed between the two vertical plates 2 and a drive motor 8 installed on the side of one of the vertical plates 2. The output end of the drive motor 8 is connected to the bidirectional screw rod 9, and the bidirectional screw rod 9 passes through the two threaded sleeves 11. The two threaded sleeves 11 are symmetrically distributed on the bidirectional screw rod 9 and are threadedly connected to the bidirectional screw rod 9.

[0052] During operation, after the frame to be welded is formed, the driving motor 8 drives the bidirectional screw 9 to rotate, and the two threaded sleeves 11 simultaneously perform threaded cooperation with the bidirectional screw 9 and move away from each other. Correspondingly, the driving column 10 slides in the first inclined section 701, the first straight section 702, the second inclined section 703 and the second straight section 704 in sequence. When passing through the first inclined section 701, the transmission plate 7 drives the driving plate 6 to give way, and the pulley 601 performs rolling cooperation with the driven plate 5, so that the driven plate 5 drives the slider 4 to slide in the guide groove on the horizontal platform 3. The multiple first limiting columns 401 on the horizontal platform 3 show a tendency to gather until the driving column 10 enters the first straight section 702. The first limiting column 401 cooperates with the limiting block 301 to apply pressure to the upper and lower chord rods and the vertical rods on both sides, so that the upper and lower chord rods and the vertical rods on both sides are fixed;

[0053] When the driving column 10 moves in the first straight section 702, the second fastening mechanism is triggered to apply pressure to the diagonal rod and the central vertical rod, so that the frame to be welded is stabilized as a whole. Then, the driving motor 8 stops running, and the staff can start a welding operation.

[0054] After one welding is completed, the drive motor 8 continues to run, and the drive column 10 enters the second inclined section 703, prompting the transmission plate 7 to drive the drive plate 6 to reset, and the first limit column 401 releases the fixing state of the upper and lower chord rods and the vertical rods on both sides, so that when the drive column 10 moves in the second straight section 704 later, that is, when the shifting mechanism is triggered, the Bailey plate can rise and flip smoothly.

[0055] Please refer again Figure 6 , Figure 7 as well as Figure 8 The second fastening mechanism includes an assembly plate 24 connected to the shifting mechanism, a one-way screw 27 rotatably mounted on the assembly plate 24, and a drive tube 28 sleeved on the one-way screw 27 and threadedly connected to the one-way screw 27. A gear 25 is rotatably mounted on the assembly plate 24. The one-way screw 27 is connected to the rotating shaft of the gear 25 through a second transmission belt 26. The threaded sleeve 11 is fixedly connected to a rack plate 14 that matches the gear 25. A guide plate 32 is provided on the assembly plate 24 through two connecting columns 29. Four movable members 33 are slidably provided on the guide plate 32. A second limiting column 3301 is provided on the movable member 33. The movable member 33 is connected to a set 30 slidably provided on the connecting column 29 through a push-pull rod 31. The two ends of the push-pull rod 31 are respectively hinged to the set 30 and the movable member 33. The set 30 is fixed to the drive tube 28.

[0056] When the driving column 10 moves along the first straight section 702 toward the second inclined section 703, the upper and lower chords and the vertical rods on both sides have been fixed, and the rack plate 14 is meshed with the gear 25. Therefore, the gear 25 rotates, and its rotating shaft drives the one-way screw 27 to rotate through the second transmission belt 26. The driving tube 28 is threadedly matched with the one-way screw 27 and moves close to the guide plate 32. Correspondingly, the kit 30 pushes the movable part 33 to slide on the guide plate 32 through the push-pull rod 31, and the plurality of second limit columns 3301 show an expansion trend to exert pressure on the diagonal rod and the central vertical rod, so that the overall frame to be welded is stabilized.

[0057] Please refer again Figure 5 , Figure 6 , Figure 7 as well as Figure 8 A lifting block 19 is slidably engaged on the vertical plate 2, and a rotating shaft 34 fixed to the assembly plate 24 is rotatably installed on the lifting block 19. The rotating shaft 34 is connected to a follow-up trigger structure. The lifting block 19 is connected to the shifting mechanism, and the shifting mechanism is connected to the follower sleeve 12.

[0058] The shifting mechanism includes two rotating wheels 17 rotatably mounted on the sides of the vertical plate 2, a connecting piece 18 connecting the two rotating wheels 17, and a cylinder 1801 arranged on the connecting piece 18. The lifting block 19 is fixedly connected to a transmission rod 20. The transmission rod 20 is provided with a slot 2001 adapted to the cylinder 1801. The cylinder 1801 passes through the slot 2001 and is slidably connected to the transmission rod 20. The connecting piece 18 rolls with the two rotating wheels 17, and the rotating shaft of one of the rotating wheels 17 is connected to the follower sleeve 12 through a transmission structure. The transmission structure includes a driven shaft 15 rotatably mounted on the vertical plate 2 and slidingly engaged with the follower sleeve 12, a first boss is provided on the inner wall of the follower sleeve 12, the first boss extends into a groove body provided on the outer wall of the driven shaft 15 and is slidably connected to the driven shaft 15, the groove body includes a connected axial groove 1501 and a spiral groove 1502, and the driven shaft 15 is connected to the rotating shaft of the rotating wheel 17 through a first transmission belt 16.

[0059] After the rack plate 14 is separated from the gear 25, the frame to be welded is stabilized as a whole, and welding can be carried out once. After welding is completed once, the drive motor 8 continues to operate, and the drive column 10 moves along the second inclined section 703, prompting the transmission plate 7 to drive the drive plate 6 to reset, and the first limit column 401 releases the fixing state of the upper and lower chord rods and the vertical rods on both sides;

[0060] When the driving column 10 slides in the first inclined section 701, the first straight section 702 and the second inclined section 703 in sequence, the first protrusion on the inner wall of the follower sleeve 12 slides along the axial groove 1501, and the axial groove 1501 is parallel to the central axis of the driven shaft 15, so that the driven shaft 15 does not rotate. After the driving column 10 enters the second straight section 704, the first protrusion slides along the spiral groove 1502, causing the driven shaft 15 to rotate, so that the driven shaft 15 drives the rotating wheel 17 to rotate through the first transmission belt 16;

[0061] Furthermore, the connecting member 18 forms a closed figure, which can be regarded as two relative vertical line segments and two relative semicircles. Taking the state shown in the accompanying figure as an example, at this time, the cylinder 1801 is at the midpoint of one of the semicircles. Whenever the first boss slides along the spiral groove 1502, the rotating wheel 17 rotates, which will cause the first boss to transfer from the midpoint of one semicircle to the midpoint of the other semicircle. During the transfer process, the first boss slides with the transmission rod 20 through the notch 2001, so that the transmission rod 20, the lifting block 19, the rotating shaft 34 and the assembly plate 24 rise. At this time, the plurality of second limiting columns 3301 are in a pressure state on the oblique rod and the central vertical rod, that is, the entire frame after one welding is supported, and the frame after one welding can also follow the rise. When the follow-up trigger structure moves during the rising process, the rotating shaft 34 drives the assembly plate 24 to flip 180° to facilitate the welding work on the other side.

[0062] The follow-up trigger structure includes a driven tube 22 rotatably mounted on the lifting block 19 and a limit column 21 fixedly mounted on the side of the vertical plate 2. The driven tube 22 is connected to the rotating shaft 34 through a bevel gear set 23. The bevel gear set 23 includes a first bevel gear fixedly mounted on the driven tube 22 and a second bevel gear fixedly mounted on the rotating shaft 34. The second bevel gear meshes with the first bevel gear. A second boss is provided on the inner wall of the driven tube 22. A limit groove adapted to the second boss is provided on the outer wall of the limit column 21. The second boss extends into the limit groove and is slidably connected to the limit column 21. The limit groove includes a connected vertical groove 2101 and a curved groove 2102.

[0063] When the lifting block 19 is rising, the second boss will first rise along the vertical groove 2101. During this process, the driven tube 22 will not rotate. Then, when the second boss slides along the curved groove 2102, the driven tube 22 will rotate. Accordingly, the driven tube 22 drives the rotating shaft 34 to rotate through the bevel gear set 23, so that the assembly plate 24 drives the frame that has been welded once to complete the flipping for secondary welding. After the welding is completed, the drive motor 8 is turned on again and the direction of operation is changed. After the components are reset, the Bailey plate on the horizontal table 3 can be removed.

[0064] As another embodiment of the present invention, a Bailey sheet welding process is also proposed, using the above-mentioned Bailey sheet automatic transfer welding device, comprising the following steps:

[0065] Step 1, referring to the plurality of limit blocks 301, place the upper and lower chord rods, vertical rods and diagonal rods on the horizontal platform 3 to form a frame to be welded;

[0066] Step 2: The lateral movement mechanism works in the forward direction, firstly, the first fastening mechanism cooperates with the limit block 301 to fix the upper and lower chord rods and the vertical rods on both sides, and then the second fastening mechanism cooperates with the limit block 301 to fix the diagonal rod and the central vertical rod;

[0067] Step 3: the traverse mechanism stops working and a welding process is performed using a welding tool;

[0068] Step 4: After the welding process is completed, the lateral movement mechanism continues to move, firstly prompting the first fastening mechanism to release the fixing state of the upper and lower chord rods and the vertical rods on both sides, and the transposition mechanism is triggered to drive the frame to rise and turn over;

[0069] Step 5: the lateral movement mechanism stops working and a secondary welding process is performed using a welding tool;

[0070] Step 6: After welding is completed, the transverse movement mechanism works in the reverse direction to reset the components and remove the Bailey sheet on the transverse platform 3.

[0071] As another embodiment of the present invention, a pre-arched Bailey steel bridge is also proposed, which is welded by the Bailey sheet automatic transfer welding device described in any one of the above items. The Bailey sheet welded by the welding device avoids the problem of large position size differences caused by the patchwork welding method, so it has higher accuracy and can effectively improve the stability of the Bailey sheet. When the Bailey sheet is applied to the manufacture of a steel bridge, the stability of the steel bridge can be ensured.

[0072] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0073] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic Bailey sheet transfer welding device, comprising a workbench (1), two vertical plates (2) arranged on the workbench (1), and a horizontal table (3) arranged between the two vertical plates (2), wherein the horizontal table (3) is provided with a plurality of limit blocks (301) for positioning upper and lower chord rods, vertical rods and diagonal rods, so that the upper and lower chord rods, vertical rods and diagonal rods form a frame to be welded on the horizontal table (3); It is characterized in that Also includes: A first fastening mechanism, two groups of which are provided between the workbench (1) and the horizontal platform (3), the first fastening mechanism being used to cooperate with the limit block (301) to fix the upper and lower chord rods and the vertical rods on both sides, and the two groups of the fastening mechanism being connected to a transverse movement mechanism installed between the two vertical plates (2); A second fastening mechanism, one set of which is provided on each side of the two vertical plates (2) facing the horizontal platform (3), the second fastening mechanism being used to fix the oblique rod and the central vertical rod, and the second fastening mechanism being further connected to a transposition mechanism installed on the vertical plates (2); The transverse movement mechanism can successively drive the first fastening mechanism and the second fastening mechanism to perform a fixing action so as to perform a primary welding, and then can cause the first fastening mechanism to release the fixing, and cause the transposition mechanism to drive the Bailey sheet to rise and flip over so as to perform a secondary welding; The horizontal platform (3) is provided with four groups of guide grooves, and two sliders (4) are slidably engaged in each group of the guide grooves, a first limiting column (401) is provided on the slider (4), and a driven plate (5) is fixedly connected between the two sliders (4); The first fastening mechanism comprises a driving plate (6) slidably arranged at the bottom of the horizontal platform (3) and capable of moving along the width direction of the horizontal platform (3), and a transmission plate (7) fixed to the driving plate (6), the transmission plate (7) being provided with two transmission grooves, and a pulley (601) is respectively provided at both ends of the driving plate (6), and the pulley (601) is rollingly engaged in a groove (501) provided on the driven plate (5); The transverse movement mechanism comprises two threaded sleeves (11) and two follower sleeves (12) movably arranged below the horizontal platform (3) through a threaded driving member, wherein the threaded sleeves (11) and the follower sleeves (12) are both provided with a driving column (10), and the two are fixed by a connecting frame (13), the driving column (10) extends into the transmission groove and is slidably connected to the transmission plate (7), and the transmission groove comprises a first inclined section (701), a first straight section (702), a second inclined section (703) and a second straight section (704) which are connected in sequence.

2. The Bailey sheet automatic transfer welding device according to claim 1 is characterized in that: The second fastening mechanism comprises an assembly plate (24) connected to the shifting mechanism, a one-way screw (27) rotatably mounted on the assembly plate (24), and a driving tube (28) sleeved on the one-way screw (27) and threadedly connected to the one-way screw (27); a gear (25) is rotatably mounted on the assembly plate (24); the one-way screw (27) is connected to the rotating shaft of the gear (25) via a second transmission belt (26); and the threaded sleeve (11) is fixedly connected to a rack plate (14) that cooperates with the gear (25); The assembly plate (24) is provided with a guide plate (32) via two connecting columns (29), four movable parts (33) are slidably provided on the guide plate (32), a second limiting column (3301) is provided on the movable part (33), and the movable part (33) is connected to a set (30) slidably provided on the connecting column (29) via a push-pull rod (31), the two ends of the push-pull rod (31) are respectively hinged to the set (30) and the movable part (33), and the set (30) is fixed to the driving tube (28).

3. The Bailey sheet automatic transfer welding device according to claim 2 is characterized in that: A lifting block (19) is slidably engaged on the vertical plate (2), a rotating shaft (34) fixed to the assembly plate (24) is rotatably mounted on the lifting block (19), the rotating shaft (34) is connected to a follower trigger structure, the lifting block (19) is connected to the shifting mechanism, and the shifting mechanism is connected to the follower sleeve (12).

4. The Bailey sheet automatic transfer welding device according to claim 3 is characterized in that: The shifting mechanism comprises two rotating wheels (17) rotatably mounted on the side of the vertical plate (2), a connecting member (18) connecting the two rotating wheels (17), and a cylinder (1801) provided on the connecting member (18); the lifting block (19) is fixedly connected to a transmission rod (20); a notch (2001) adapted to the cylinder (1801) is provided on the transmission rod (20); the cylinder (1801) passes through the notch (2001) and is slidably connected to the transmission rod (20); the connecting member (18) is rollingly matched with the two rotating wheels (17), and the rotating shaft of one of the rotating wheels (17) is connected to the follower sleeve (12) through a transmission structure.

5. The Bailey sheet automatic transfer welding device according to claim 4, characterized in that: The transmission structure comprises a driven shaft (15) rotatably mounted on the vertical plate (2) and slidably engaged with the driven sleeve (12); a first protrusion is provided on the inner wall of the driven sleeve (12); the first protrusion extends into a groove body provided on the outer wall of the driven shaft (15) and is slidably connected to the driven shaft (15); the groove body comprises an axial groove (1501) and a spiral groove (1502) connected to each other; the driven shaft (15) is connected to the rotating shaft of the rotating wheel (17) via a first transmission belt (16).

6. The Bailey sheet automatic transfer welding device according to claim 3, characterized in that: The follow-up trigger structure comprises a driven tube (22) rotatably mounted on the lifting block (19) and a limiting column (21) fixedly mounted on the side of the vertical plate (2); the driven tube (22) is connected to the rotating shaft (34) via a bevel gear set (23); a second protrusion is provided on the inner wall of the driven tube (22); a limiting groove adapted to the second protrusion is provided on the outer wall of the limiting column (21); the second protrusion extends into the limiting groove and is slidably connected to the limiting column (21); the limiting groove comprises a connected vertical groove (2101) and a curved groove (2102).

7. A Bailey sheet welding process, using the Bailey sheet automatic transfer welding device as claimed in claim 1, characterized in that: The following steps are involved: Step 1, referring to a plurality of limit blocks (301), placing the upper and lower chord rods, the vertical rods and the diagonal rods on the horizontal platform (3) to form a frame to be welded; Step 2: The transverse movement mechanism works in the forward direction, firstly causing the first fastening mechanism to cooperate with the limit block (301) to fix the upper and lower chord rods and the vertical rods on both sides, and then causing the second fastening mechanism to cooperate with the limit block (301) to fix the diagonal rod and the central vertical rod; Step 3: the traverse mechanism stops working and a welding process is performed using a welding tool; Step 4: After the welding process is completed, the lateral movement mechanism continues to move, firstly prompting the first fastening mechanism to release the fixing state of the upper and lower chord rods and the vertical rods on both sides, and the transposition mechanism is triggered to drive the frame to rise and turn over; Step 5: the lateral movement mechanism stops working and a secondary welding process is performed using a welding tool; Step 6: After welding is completed, the transverse movement mechanism works in the reverse direction to reset the components and remove the Bailey sheet on the transverse platform (3).

8. Pre-arched Bailey steel bridge, characterized in that: The method is formed by welding using the Bailey sheet automated transfer welding device as described in any one of claims 1 to 6.

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