A positioning and welding apparatus and method for bridge steel structures

Abstract

The application relates to the technical field of plasma arc welding, in particular to a positioning welding equipment and method for bridge steel structures, which mainly comprises a plasma arc equipment, a lifting mechanism is arranged on the plasma arc equipment, a horizontal moving mechanism is arranged on the lifting mechanism, the lifting mechanism can drive the horizontal moving mechanism to move in the vertical direction, and a translation mechanism is arranged on the horizontal moving mechanism. The movable welding frame length can be adjusted through the spliced joint head-to-tail insertion and length adjusting lever, different lengths of bridge steel structural members can be adapted, and the problem that the length of the traditional integrated welding table is unchangeable is solved; the movable welding frame is driven to overturn around the adjusting base plate through the deflection angle mechanism, the first positioning probe detects the inclination of the welding surface, the automatic adaptation of the inclination angle is realized, the complex operation of manually arranging the cushion block is replaced, the adaptation range covers steel structural members with different sizes and different inclination angles, the adaptation is better, and the limitation is smaller.

Description

Technical Field

[0001] This invention relates to the field of plasma arc welding technology, specifically to a positioning welding device and method for bridge steel structures. Background Technology

[0002] Existing positioning welding equipment for bridge steel structures mainly consists of plasma arc welding equipment, welding torch adjustment mechanism, welding table, support mechanism, and moving mechanism. In terms of specific structure, welding torch adjustment mostly relies on gears, belts, and other multiple transmission components to achieve two-dimensional or three-dimensional movement. The welding table is an integrated fixed structure, in which the base and worktable are mostly designed as one piece. The support mechanism is mostly a single fixed frame. The moving mechanism drives the whole or workpiece to move through drive components. In use, the bridge steel structure is fixed on the welding table, then the moving mechanism drives the bridge steel structure to move, and then the welding torch adjustment mechanism drives the welding torch to move and weld the bridge steel structure.

[0003] However, welding tables are mostly integrated structures with fixed lengths, which greatly limits their adaptability to steel structural components of different sizes. Furthermore, tilting them requires manual use of pads, which is complex and time-consuming. This not only results in poor adaptability but also significantly reduces welding efficiency, severely restricting production efficiency. In addition, the lack of adjustable extension and limiting designs makes it impossible to provide stable transportation and multi-point limiting for steel structural components of different specifications, affecting the positioning accuracy before welding and failing to guarantee the stability and reliability of welding quality.

[0004] Therefore, there is an urgent need to design a positioning and welding equipment for bridge steel structures to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning welding device and method for bridge steel structures, in order to solve the problems mentioned in the background art. These problems are that the welding tables are mostly integrated structures with fixed lengths, which greatly limit their adaptability to steel structural components of different sizes. Furthermore, the tilting adaptation requires manual use of pads, which is complicated and time-consuming. This not only results in poor adaptability but also leads to a significant reduction in welding efficiency, severely restricting production efficiency. At the same time, the lack of adjustable extension and limiting design makes it impossible to provide stable transportation and multi-point limiting for steel structural components of different specifications, affecting the positioning accuracy before welding and failing to guarantee the stability and reliability of welding quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A positioning welding device for bridge steel structures includes: a plasma arc device, wherein the plasma arc device is equipped with a lifting mechanism, the lifting mechanism is equipped with a transverse mechanism, the lifting mechanism can drive the transverse mechanism to move vertically, the transverse mechanism is equipped with a translation mechanism, the transverse mechanism can drive the translation mechanism to move left and right, a support base is provided below the translation mechanism, the bridge steel structure is placed on top of the support base, extension brackets and movable welding frames are symmetrically installed on both sides of the support base, the movable welding frames are connected to the support base by transmission, the included angle between the two movable welding frames is adjustable, the movable welding frame is composed of multiple splice sections connected end to end, each splice section is equipped with an extension bracket at the bottom, a length adjustment bar is connected between two adjacent extension brackets, and an angle adjustment mechanism is provided between the support base and the movable welding frame, the angle adjustment mechanism can adjust the included angle between the two movable welding frames.

[0007] Preferably, the plasma arc equipment includes a plasma arc welding machine and a plasma arc welding head. A lifting mechanism is fixedly installed on the plasma arc welding machine, which integrates a hydraulic control system. The plasma arc welding head is fixedly installed on a translation mechanism, which can drive the plasma arc welding head to move along a direction perpendicular to the paper. A support plate is fixedly sleeved on the plasma arc welding head, and a first positioning probe and a second positioning probe are fixedly inserted on the support plate. The first and second positioning probes are located on opposite sides of the plasma arc welding head. Both the first and second positioning probes of the plasma arc welding head are connected to the plasma arc welding machine through a bundled pipeline. The plasma arc welding machine is electrically connected to the first and second positioning probes through the bundled pipeline, and the plasma arc welding machine is connected to the material transfer connection of the plasma arc welding head through the bundled pipeline.

[0008] Preferably, the lifting mechanism includes two supporting base plates, which are respectively located on both sides of the plasma arc welding machine. The supporting base plates are fixedly connected to the side of the plasma arc welding machine and located at its bottom. A lifting screw is movably sleeved on the top surface of the supporting base plate. A supporting top plate located at the top of the lifting screw is movably sleeved on its exterior. The supporting top plate is fixedly connected to the side of the plasma arc welding machine and located at its top. A transmission gear located at the top of the lifting screw is fixedly sleeved on its exterior. The transmission gear is connected to a drive gear via a transmission hole. A drive motor is fixedly installed on the drive gear. The drive motor is fixedly installed inside the plasma arc welding machine. A threaded short pipe located between the supporting base plate and the supporting top plate is threadedly sleeved on the exterior of the lifting screw. A moving lever arm is fixedly sleeved on the exterior of the threaded short pipe. The moving lever arm is fixedly connected to the transverse movement mechanism.

[0009] Preferably, the transverse movement mechanism includes a device plate, which is fixedly connected to two moving arms. A first side strip and a second side strip are fixedly connected to the bottom surface of the device plate. The first side strip and the second side strip are located on both sides of the device plate, respectively. Two transverse sliding rods are fixedly connected between the first side strip and the second side strip. A transverse base is provided between the first side strip and the second side strip. A transverse through hole is provided on the transverse base. The transverse sliding rod is slidably inserted into the transverse through hole. An internal threaded hole is provided on the transverse base located in the middle. A transverse screw is movably inserted into the internal threaded hole. The transverse screw is threadedly engaged with the internal threaded hole. One end of the transverse screw is rotatably inserted into the second side strip. The other end of the transverse screw passes through the first side strip and is fixedly connected to a transverse motor. The transverse motor is bolted to the first side strip.

[0010] Preferably, the translation mechanism includes a T-shaped groove, which is formed on the surface of the horizontal base away from the equipment plate. A T-shaped base is slidably inserted into the T-shaped groove. A translation threaded hole is formed on the side of the T-shaped base. A translation screw is movably inserted into the translation threaded hole. The translation screw is threadedly engaged with the translation threaded hole. One end of the translation screw is movably sleeved on the inner wall of the T-shaped groove. The other end of the translation screw extends to the outside of the horizontal base and is fixedly connected to a translation motor. The translation motor is bolted to the end face of the horizontal base.

[0011] Preferably, the support base includes a fixed horizontal plate, which is fixedly connected to the surface of the plasma arc welding machine. The fixed horizontal plate has a fixed sliding hole, and an adjusting sliding rod is movably inserted into the fixed sliding hole. An adjusting pad is fixedly connected to the top of the adjusting sliding rod, and the bridge steel structure is placed on the top surface of the adjusting pad.

[0012] Preferably, the extension bracket includes two bracket arm plates, with a lifting top plate fixedly connected between the two bracket arm plates. A movable welding frame is placed on the top surface of the lifting top plate. Universal wheels are fixedly installed on the bottom surface of the bracket arm plates. Limiting clamps are fixedly connected to the top of the bracket arm plates. Fixed pads and movable pads are respectively provided on the two adjacent surfaces of the two limiting clamps. Fixed pads are bolted to the limiting clamps. Elastic pads are fixedly installed on the two adjacent surfaces of the fixed pads and movable pads. The elastic pads are clamped on the surface of the bridge steel structure. A guide slide rod is fixedly installed on the surface of the movable pad away from the elastic pad. The guide slide rod slides through the limiting clamp. A clamping telescopic bar is bolted to the surface of this limiting clamp away from the movable pad. The end of the extension rod in the clamping telescopic bar passes through the limiting clamp and is fixedly connected to the surface of the movable pad.

[0013] Preferably, a reinforcing partition plate located below the lifting top plate is fixedly connected between the two bracket arm plates. Two balance holes are provided on the reinforcing partition plate, and a balance plate is movably inserted inside the balance holes. A load-bearing plate is fixedly connected to the bottom end of the balance plate. A receiving through hole is provided on the load-bearing plate, and a caster wheel is located inside the receiving through hole. A lifting telescopic bar is bolted to the top surface of the reinforcing partition plate. The end of the extension rod in the lifting telescopic bar passes through the reinforcing partition plate and is fixedly connected to the surface of the load-bearing plate.

[0014] Preferably, the splicing section includes a welded top plate, the upper surface of which has four splicing slots. One end of each splicing slot is open and the opening is located on the end face of the welded top plate. A splicing rod is fixedly connected to the other end face of the welded top plate. The splicing rod can be inserted into the splicing slot. The welded top plate is placed on the top surface of the supporting top plate. The side of the welded top plate is in contact with the surface of the limiting clamp. The welded top plate and the limiting clamp are connected by bolts. Two rows of fixed arm plates are fixedly installed on the top surface of the welded top plate. The two rows of fixed arm plates extend along the two sides of the welded top plate. Each row has multiple fixed arm plates, which are evenly distributed. The fixed arm plates in the two rows correspond one-to-one. A transport roller is installed between the two corresponding fixed arm plates, and the bridge steel structure moves on the transport roller.

[0015] Preferably, the deflection mechanism includes a deflection base plate, which is fixedly connected to the surface of the plasma arc welding machine and located below the fixed horizontal plate. The bottom surface of the deflection base plate is flush with the bottom surface of the plasma arc welding machine. A deflection motor is bolted to the top surface of the deflection base plate. A deflection long arm is fixedly sleeved on the output shaft of the deflection motor. An adaptation sliding hole is provided on the deflection long arm. A deflection column is movably inserted into the adaptation sliding hole. The top of the deflection column is fixedly connected to the bottom surface of a welding top plate. An arc surface is provided on the surface of this welding top plate near the adjusting pad. A T-shaped slide rail is fixedly connected to the inner wall of the arc surface. The adjusting pad is semi-circular in shape. A T-shaped slide rail is provided on the arc surface of the adjusting pad. The T-shaped slide rail is slidably inserted into the inside of the T-shaped slide rail. The inner wall of the arc surface is slidably connected to the arc surface of the adjusting pad.

[0016] Preferably, a positioning welding method for bridge steel structures includes the following steps: The first step is to place the two bridge steel structural components to be welded onto two mobile welding frames respectively; The second step is to start the welding operation using a plasma arc device. The third step is to stop the plasma arc equipment when the welding is completed, and then remove the welded bridge steel structure component.

[0017] Compared with the prior art, the beneficial effects of the present invention are: By using the splicing sections to connect the ends and the length adjustment lever, the length of the mobile welding frame can be adjusted, making it suitable for bridge steel structural components of different lengths and solving the problem of the fixed length of traditional integrated welding tables. Combined with the tilt mechanism driving the mobile welding frame to rotate around the adjustment pad, and with the first positioning probe detecting the tilt of the welding surface, the tilt angle can be automatically adapted, replacing the complicated operation of manually placing pads. The adaptability range covers steel structural components of different sizes and tilt angles, with better adaptability and fewer limitations.

[0018] On the one hand, the first positioning probe detects the contour and position of the welding surface, and the second positioning probe monitors the distance between the plasma arc welding head and the workpiece surface in real time, providing accurate position data. Combined with the closed-loop control of the plasma arc welding machine, this ensures that the plasma arc welding head is precisely aligned with the weld seam through three-dimensional adjustment via the lifting mechanism, the horizontal movement mechanism, and the translation mechanism. On the other hand, the extension bracket forms a multi-point clamping mechanism, which, combined with the lifting telescopic bar, tightens the ground to fix the work position, reducing displacement caused by welding vibration. This significantly improves the first-pass yield and welding quality stability of the weld seam.

[0019] This positioning and welding equipment for bridge steel structures can automatically complete the entire process of station movement, length adjustment, angle adaptation, workpiece clamping, welding torch positioning, and welding reset without frequent manual intervention. Compared with traditional equipment that requires manual adjustment of fixtures and manual correction of tilt, it significantly shortens preparation time and greatly improves welding efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 4 For the present invention Figure 3 A three-dimensional structural diagram of the transverse movement mechanism; Figure 5 For the present invention Figure 4 Another three-dimensional structural diagram; Figure 6 For the present invention Figure 5 A three-dimensional structural diagram of the transverse sliding base; Figure 7 For the present invention Figure 1 A schematic diagram of the first three-dimensional structure of the splicing section on the welding frame of China Mobile. Figure 8 For the present invention Figure 1 A three-dimensional structural diagram of the central extension bracket; Figure 9 For the present invention Figure 2 A three-dimensional structural diagram of the center-angle mechanism; Figure 10 For the present invention Figure 1 A schematic diagram of the second type of three-dimensional structure of the splicing section on the welding frame of China Mobile. Figure 11 For the present invention Figure 4 A three-dimensional structural diagram of the installation structure between the central support bar and the second side bar.

[0021] In the picture: 1. Plasma arc equipment; 101. Plasma arc welding machine; 102. Bearing plate; 103. Plasma arc welding head; 104. First positioning probe; 105. Second positioning probe; 106. Bundling pipeline; 107. Lifting bar; 108. Lifting hole; 109. T-shaped slide; 110. T-shaped slider; 2. Lifting mechanism; 201. Support base plate; 202. Lifting screw; 203. Support top plate; 204. Transmission gear; 205. Transmission belt; 206. Drive gear; 207. Drive motor; 208. Threaded short pipe; 209. Moving lever arm; 3. Horizontal movement mechanism; 301. Equipment plate; 302. First side strip; 303. Second side strip; 304. Horizontal movement slide bar; 305. Horizontal movement base; 306. Horizontal movement through hole; 307. Internal threaded hole; 308. Horizontal movement screw; 309. Horizontal movement motor; 4. Translation mechanism; 401. T-groove; 402. T-base; 403. Translation threaded hole; 404. Translation screw; 405. Translation motor; 5. Support base; 501. Fixed cross plate; 502. Fixed sliding hole; 503. Adjusting slide rod; 504. Adjusting pad; 505. T-shaped slide rail; 506. T-shaped slide rail; 507. Arc surface; 6. Extension bracket; 601. Bracket arm plate; 602. Top plate support; 603. Casters; 604. Limiting clamp; 605. Fixed pad; 606. Movable pad; 607. Elastic pad; 608. Guide slide bar; 609. Clamping telescopic bar; 610. Reinforced partition plate; 611. Balance hole; 612. Balance plate; 613. Load-bearing plate; 614. Receiving through hole; 615. Lifting telescopic bar; 7. Mobile welding frame; 701. Welding top plate; 702. Splicing slot; 703. Splicing rod; 704. Fixed arm plate; 705. Transport roller; 8. Angle deflection mechanism; 801. Angle deflection base plate; 802. Angle deflection motor; 803. Angle deflection long arm; 804. Adaptive sliding hole; 805. Angle deflection column; 9. Length adjustment lever. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] like Figures 1-11 As shown, this application provides a positioning welding device for bridge steel structures, including: a plasma arc device 1, a lifting mechanism 2 on the plasma arc device 1, a transverse movement mechanism 3 on the lifting mechanism 2, the lifting mechanism 2 can drive the transverse movement mechanism 3 to move in the vertical direction, a translation mechanism 4 on the transverse movement mechanism 3, the transverse movement mechanism 3 can drive the translation mechanism 4 to move left and right, a support base 5 is provided below the translation mechanism 4, the bridge steel structure is placed on the top of the support base 5, extension brackets 6 and movable welding frames 7 are symmetrically installed on both sides of the support base 5, the movable welding frames 7 are connected to the support base 5 by transmission, the included angle between the two movable welding frames 7 is adjustable, the movable welding frame 7 is formed by multiple splicing sections connected end to end, an extension bracket 6 is installed at the bottom of each splicing section, a length adjustment bar 9 is connected between two adjacent extension brackets 6, an angle adjustment mechanism 8 is provided between the support base 5 and the movable welding frame 7, the angle adjustment mechanism 8 can adjust the included angle between the two movable welding frames 7.

[0025] The distance between the two extension brackets 6 can be adjusted by the length adjustment lever 9, so that the extension brackets 6 can adjust the distance between two adjacent splicing sections on the movable welding frame 7, so as to adapt to the length of the bridge steel structure component.

[0026] Please see Figure 2 , Figure 3 and Figure 6The plasma arc equipment 1 includes a plasma arc welding machine 101 and a plasma arc welding head 103. A lifting mechanism 2 is fixedly installed on the plasma arc welding machine 101. The plasma arc welding machine 101 integrates a hydraulic control system, which is controlled by the plasma arc welding machine 101 and connected to a length adjusting lever 9. The plasma arc welding head 103 is fixedly installed on a translation mechanism 4, which can drive the plasma arc welding head 103 to move along a direction perpendicular to the paper plane. A bearing plate 102 is fixedly sleeved on the plasma arc welding head 103. The first positioning probe 104 and the second positioning probe 105 are fixedly inserted into the 2. The first positioning probe 104 and the second positioning probe 105 are located on both sides of the plasma arc welding head 103. The first positioning probe 104 and the second positioning probe 105 of the plasma arc welding head 103 are both connected to the plasma arc welding machine 101 through the bundled pipeline 106. The plasma arc welding machine 101 is electrically connected to the first positioning probe 104 and the second positioning probe 105 through the bundled pipeline 106. The plasma arc welding machine 101 is connected to the material transfer connection of the plasma arc welding head 103 through the bundled pipeline 106.

[0027] The first positioning probe 104 is a vision sensor used to detect the shape and tilt of the welding surface, and the second positioning probe 105 is a rangefinder used to detect the distance between the plasma arc welding head 103 and the surface of the bridge steel structure.

[0028] Please see Figure 11 The bottom surface of the second side strip 303 is connected to a support strip 107. The support strip 107 has a support hole 108. The bundled pipeline 106 is movably inserted into the support hole 108. The bottom surface of the second side strip 303 has a T-shaped groove 109. A T-shaped slider 110 is slidably inserted into the T-shaped groove 109. The T-shaped slider 110 is fixedly connected to the top surface of the support strip 107.

[0029] The arrangement of the bundled pipeline 106, which is movably inserted into the support hole 108, prevents the bundled pipeline 106 from falling down. The arrangement of the T-shaped slider 110, which is slidably inserted into the T-shaped groove 109, allows the lifting bar 107 to change position as the bundled pipeline 106 moves, thus avoiding the problem of material conveying stopping due to the excessively small bending angle of the bundled pipeline 106.

[0030] The bundled pipeline 106 is bent and distributed on the top of the equipment plate 301 to adapt to the displacement changes of the bundled pipeline 106.

[0031] Please see Figure 3 and Figure 4The lifting mechanism 2 includes two supporting base plates 201, which are located on both sides of the plasma arc welding machine 101. The supporting base plates 201 are fixedly connected to the sides and bottom of the plasma arc welding machine 101. A lifting screw 202 is movably sleeved on the top surface of the supporting base plate 201. A supporting top plate 203 is movably sleeved on the outside of the lifting screw 202. The supporting top plate 203 is fixedly connected to the side and top of the plasma arc welding machine 101. A transmission gear is fixedly sleeved on the outside of the lifting screw 202 at its top end. Wheel 204, transmission gear 204 is connected to drive gear 206 via transmission hole belt 205, drive motor 207 is fixedly installed on drive gear 206, drive motor 207 is fixedly installed inside plasma arc welding machine 101, drive motor 207 is controlled by plasma arc welding machine 101, lifting screw 202 is externally threaded with threaded short tube 208 located between bearing base plate 201 and bearing top plate 203, threaded short tube 208 is externally fixedly sleeved with moving lever arm 209, moving lever arm 209 is fixedly connected to transverse mechanism 3.

[0032] The position and height of the plasma arc welding head 103 can be adjusted by the lifting mechanism 2.

[0033] Please see Figure 4 and Figure 5 The transverse mechanism 3 includes a device plate 301, which is fixedly connected to two moving arms 209. A first side strip 302 and a second side strip 303 are fixedly connected to the bottom surface of the device plate 301. The first side strip 302 and the second side strip 303 are located on both sides of the device plate 301, respectively. Two transverse sliding rods 304 are fixedly connected between the first side strip 302 and the second side strip 303. A transverse base 305 is provided between the first side strip 302 and the second side strip 303. A transverse through hole 306 is provided on the transverse sliding rods 304. The transverse base 305 has an internal threaded hole 307 located in the middle of the transverse through hole 306. The transverse screw 308 is movably inserted into the internal threaded hole 307. The transverse screw 308 is threadedly engaged with the internal threaded hole 307. One end of the transverse screw 308 is rotatably inserted into the second side strip 303. The other end of the transverse screw 308 passes through the first side strip 302 and is fixedly connected to the transverse motor 309. The transverse motor 309 is bolted to the first side strip 302 and is controlled by the plasma arc welding machine 101.

[0034] The horizontal position of the plasma arc welding head 103 can be adjusted by the transverse mechanism 3.

[0035] Please see Figure 6The translation mechanism 4 includes a T-shaped groove 401, which is formed on the surface of the transverse base 305 away from the equipment plate 301. A T-shaped base 402 is slidably inserted into the T-shaped groove 401. A translation threaded hole 403 is formed on the side of the T-shaped base 402. A translation screw 404 is movably inserted into the translation threaded hole 403. The translation screw 404 is threadedly engaged with the translation threaded hole 403. One end of the translation screw 404 is movably sleeved on the inner wall of the T-shaped groove 401. The other end of the translation screw 404 extends to the outside of the transverse base 305 and is fixedly connected to a translation motor 405. The translation motor 405 is bolted to the end face of the transverse base 305 and is controlled by the plasma arc welding machine 101.

[0036] The position of the plasma arc welding head 103 in the direction perpendicular to the paper can be adjusted by the translation mechanism 4.

[0037] Please see Figure 9 The support base 5 includes a fixed horizontal plate 501, which is fixedly connected to the surface of the plasma arc welding machine 101. A fixed sliding hole 502 is provided on the fixed horizontal plate 501, and an adjusting sliding rod 503 is movably inserted into the fixed sliding hole 502. An adjusting pad 504 is fixedly connected to the top of the adjusting sliding rod 503, and the bridge steel structure is placed on the top surface of the adjusting pad 504.

[0038] By adjusting the setting of the slide rod 503 inserted into the fixed slide hole 502, the position height of the adjusting pad 504 can be changed as the position height of the moving welding frame 7 changes.

[0039] Please see Figure 8 The extension bracket 6 includes two bracket arm plates 601, with a lifting top plate 602 fixedly connected between the two bracket arm plates 601. A movable welding frame 7 is placed on the top surface of the lifting top plate 602. A caster wheel 603 is fixedly installed on the bottom surface of the bracket arm plates 601. A limit clamping plate 604 is fixedly connected to the top of the bracket arm plates 601. A fixed pad 605 and a movable pad 606 are respectively provided on two adjacent surfaces of the two limit clamping plates 604. The fixed pad 605 is bolted onto the limit clamping plate 604. Elastic pads 607 are fixedly installed on both sides of the movable pad 606 that are close to each other. The elastic pads 607 are clamped on the surface of the bridge steel structure. A guide slide rod 608 is fixedly installed on the surface of the movable pad 606 away from the elastic pads 607. The guide slide rod 608 slides through the limiting clamping plate 604. A clamping telescopic bar 609 is bolted to the surface of the limiting clamping plate 604 away from the movable pad 606. The end of the extension rod in the clamping telescopic bar 609 passes through the limiting clamping plate 604 and is fixedly connected to the surface of the movable pad 606.

[0040] By using the telescopic clamping bar 609 to drive the movable pad 606 closer to the fixed pad 605, multi-point clamping and fixing of the bridge steel structure components can be achieved, which helps to increase the accuracy of positioning and improve welding stability and reliability.

[0041] The end of the length adjustment lever 9 is connected to the side of the lifting top plate 602.

[0042] A reinforcing partition plate 610 located below the lifting top plate 602 is fixedly connected between the two bracket arm plates 601. Two balance holes 611 are opened on the reinforcing partition plate 610. A balance plate 612 is movably inserted inside the balance hole 611. A load-bearing plate 613 is fixedly connected to the bottom end of the balance plate 612. A receiving through hole 614 is opened on the load-bearing plate 613. A caster wheel 603 is located inside the receiving through hole 614. A lifting telescopic bar 615 is bolted to the top surface of the reinforcing partition plate 610. The end of the extension rod in the lifting telescopic bar 615 passes through the reinforcing partition plate 610 and is fixedly connected to the surface of the load-bearing plate 613. The hydraulic control system is connected to the lifting telescopic bar 615.

[0043] The casters 603 make the process of adjusting the length of the mobile welding frame 7 and the flipping process smoother and with less resistance. The load-bearing plate 613 lifts the casters 603 off the ground, increasing the contact area, increasing resistance, increasing stability, and helping to increase welding accuracy and quality.

[0044] Please see Figure 3 and Figure 7 The movable welding frame 7 is composed of multiple splicing sections connected end to end. Each splicing section includes a welding top plate 701. Four splicing slots 702 are provided on the upper surface of the welding top plate 701. One end of each splicing slot 702 is open and located on the end face of the welding top plate 701. A splicing rod 703 is fixedly connected to the other end face of the welding top plate 701. The splicing rod 703 can be inserted into the splicing slot 702. The welding top plate 701 is placed on the top surface of the supporting top plate 602. The side of the welding top plate 701 is in contact with the surface of the limiting clamp 604. The welding top plate 701 and... The limiting clamps 604 are connected by bolts. Two rows of fixed arm plates 704 are fixedly installed on the top surface of the welding top plate 701. The two rows of fixed arm plates 704 extend along the two sides of the welding top plate 701 respectively. There are multiple fixed arm plates 704 in each row. The multiple fixed arm plates 704 are distributed at equal distances. The fixed arm plates 704 in the two rows correspond one to one. A transport roller 705 is installed between the two corresponding fixed arm plates 704. The bridge steel structure moves on the transport roller 705. The transport roller 705 can drive the bridge steel structure to move under the control of the plasma arc welding machine 101.

[0045] By using a movable welding frame 7, which is composed of multiple splicing sections connected end to end, the length of the movable welding frame 7 can be adjusted according to the length of the bridge steel structure components, resulting in better adaptability and helping to improve welding quality.

[0046] Please see Figure 10 The cross-sections of the splicing slot 702 and the splicing rod 703 are both cross-shaped.

[0047] The cross-shaped design of both the splicing slot 702 and the splicing rod 703 ensures that adjacent splicing sections can only approach or move away horizontally, but cannot be separated vertically. This provides a stable platform for welding work and helps increase the accuracy of positioning.

[0048] Please see Figure 9 The deflection mechanism 8 includes a deflection base plate 801, which is fixedly connected to the surface of the plasma arc welding machine 101 and located below the fixed horizontal plate 501. The bottom surface of the deflection base plate 801 is flush with the bottom surface of the plasma arc welding machine 101. A deflection motor 802 is bolted to the top surface of the deflection base plate 801. The deflection motor 802 is controlled by the plasma arc welding machine 101. A deflection long arm 803 is fixedly sleeved on the output shaft of the deflection motor 802. An adaptation sliding hole 804 is provided on the deflection long arm 803. The adaptation sliding hole 804 is movable inside. An angled column 805 is movably inserted, and the top of the angled column 805 is fixedly connected to the bottom surface of a welded top plate 701. An arc surface 507 is formed on the surface of the welded top plate 701 near the adjusting pad 504. A T-shaped slide rail 506 is fixedly connected to the inner wall of the arc surface 507. The adjusting pad 504 is semi-circular in shape, and a T-shaped slide rail 505 is formed on the arc surface of the adjusting pad 504. The T-shaped slide rail 506 is slidably inserted into the inside of the T-shaped slide rail 505, and the inner wall of the arc surface 507 is slidably connected to the arc surface of the adjusting pad 504.

[0049] The included angle between the two movable welding frames 7 can be adjusted by the deflection mechanism 8, thereby adjusting the state of the welding surfaces so that the two welding surfaces can be joined on the adjustment pad 504.

[0050] A positioning welding method for bridge steel structures includes the following steps: Step 1: Place the two bridge steel structural components to be welded onto the two movable welding frames 7 respectively; Step 2: Start the welding operation using plasma arc equipment 1; The third step is to stop the plasma arc equipment 1 when the welding is completed, and then remove the welded bridge steel structure component.

[0051] Working principle: First, the information of the bridge steel structure component is input into the plasma arc welding machine 101. The information of the bridge steel structure component includes its length and the tilt angle of the welding surface. Then, the plasma arc welding machine 101 controls the lifting telescopic bar 615 to shorten. Next, the lifting telescopic bar 615 moves the load-bearing plate 613 upward relative to the bracket arm plate 601. Then, the bracket arm plate 601 moves the caster 603 close to the bottom surface. Then, the caster 603 lands on the ground and can roll on the ground. Then, the plasma arc welding machine 101 controls the length of the length adjustment bar 9 according to the information of the bridge steel structure component. Then, the length adjustment bar 9 gradually extends. Then, the distance between two adjacent splicing sections increases. Then, the splicing rod 703 slides inside the splicing slot 702. Then, the length of the moving welding frame 7 increases. Then, the length of the moving welding frame 7 matches the length of the bridge steel structure component. Then, the first bridge steel structure component is placed on the transport roller 705 so that the bridge steel structure component fits against the elastic pad 607 on the fixing pad 605. Then, the plasma arc welding machine 101 controls the rotation of the transport roller 705, which then moves the bridge steel structure component onto the adjusting pad 504. The welding end of the bridge steel structure component is then positioned above the adjusting pad 504. Next, the second bridge steel structure component is placed on the transport roller 705 of another movable welding frame 7, so that the bridge steel structure component fits against the elastic pad 607 on the fixing pad 605. Then, under the control of the plasma arc welding machine 101, the transport roller 705 drives the second bridge steel structure component to move onto the adjusting pad 504. Then, the welding end face of the second bridge steel structure component moves onto the adjusting pad 504. Then, the first positioning probe 104 detects the contour and position of the welding end face and sends the information to the plasma arc welding machine 101. Then, the plasma arc welding machine 101 controls the position of the welding end faces of the first and second bridge steel structure components by controlling the operation of the transport roller 705. When the welding end face is flat, the plasma arc welding machine 101 directly controls the operation of the transport roller 705 to bring the welding end faces of the first and second bridge steel structure components together. When the welding end face is inclined, the plasma arc welding machine 101 controls the deflection motor 802 to run. Then, the deflection motor 802 drives the deflection arm 803 to rotate. Then, the deflection arm 803 drives the moving welding frame 7 to rotate in the horizontal plane through the insertion action between the deflection column 805 and the matching sliding hole 804. Until the plasma arc welding machine 101 determines that the welding surface is perpendicular to the surface of the plasma arc welding machine 101 based on the information of the bridge steel structure component, the plasma arc welding machine 101 then controls the deflection motor 802 to stop. Then, the transport roller 705 gradually moves towards the plasma arc welding machine 101 under the control of the plasma arc welding machine 101. Next, the two welding ends are joined together. Then, the plasma arc welding machine 101 controls the extension of the clamping telescopic bar 609. The clamping telescopic bar 609 moves the movable pad 606 towards the fixed pad 605. Then, the movable pad 606 pushes the bridge steel structure component on the transport roller 705 through the elastic pad 607. Then, the bridge steel structure component is clamped by the two elastic pads 607. Next, the plasma arc welding machine 101 controls the extension of the lifting telescopic bar 615. Then, the load-bearing plate 613 is pressed on the ground. Then, the lifting telescopic bar 615 pushes the caster 603 off the ground through the reinforcing partition plate 610 and the bracket arm plate 601. Then, the positions of the extension bracket 6 and the moving welding frame 7 are fixed. Then, the transverse motor 309 runs under the control of the plasma arc welding machine 101 and rotates the transverse screw 308. Then, the transverse screw 308 drives the transverse base 305 to move horizontally through the threaded engagement between itself and the internal threaded hole 307, adjusting the horizontal position of the plasma arc welding head 103. Next, the translation motor 405, under the control of the plasma arc welding machine 101, rotates the translation screw 404. Then, the translation screw 404, through the threaded engagement between itself and the translation threaded hole 403, drives the T-shaped base 402 to move along the direction perpendicular to the paper plane, adjusting the position of the plasma arc welding head 103 in the vertical direction until the plasma arc welding head 103 is aligned with one end of the gap formed by the two welding end faces. Then, the drive motor 207 runs under the control of the plasma arc welding machine 101. The drive motor 207 then drives the lifting screw 202 to rotate through the drive gear 206, transmission belt 205, and transmission gear 204. Then, the threaded short pipe 208, through the threaded engagement between itself and the lifting screw 202, moves the transverse mechanism 3 and the translation mechanism 4 downwards. The translation mechanism 4 moves the T-shaped base 402 along the direction perpendicular to the paper plane, adjusting the position of the plasma arc welding head 103 until it aligns with one end of the gap formed by the two welding end faces. Then, the drive motor 207 runs under the control of the plasma arc welding machine 101. The drive motor 207 then drives the lifting screw 202 to rotate through the drive gear 206, transmission belt 205, and transmission gear 204. Then, the threaded short pipe 208, through the threaded engagement between itself and the lifting screw 202, moves the transverse mechanism 3 and the translation mechanism 4 downwards. The plasma arc welding head 103 moves downward. Then, the second positioning probe 105 detects the distance between the plasma arc welding head 103 and the surface of the bridge steel structure in real time. When the distance between the plasma arc welding head 103 and the surface of the bridge steel structure reaches the preset value inside the plasma arc welding machine 101, the plasma arc welding machine 101 controls the drive motor 207 to stop. Then, the plasma arc welding machine 101 controls the plasma arc welding head 103 to start the welding process. Next, under the control of the transverse mechanism 3 and the translation mechanism 4, the plasma arc welding head 103 moves along the gap formed by the two welding end faces and completes the welding. After that, the plasma arc welding machine 101 controls the lifting mechanism 2, the transverse mechanism 3, and the translation mechanism 4 to reset the plasma arc welding head 103. Then, the plasma arc welding machine 101 controls the clamping telescopic bar 609 to shorten. Then, the clamping telescopic bar 609, along with the movable pad 606, moves away from the bridge steel structure, releasing the clamping fixation. Finally, the welded bridge steel structure is transferred out.

[0052] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0053] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A positioning welding device for bridge steel structures, comprising: A plasma arc device (1) is characterized in that a lifting mechanism (2) is provided on the plasma arc device (1), a transverse mechanism (3) is provided on the lifting mechanism (2), the lifting mechanism (2) can drive the transverse mechanism (3) to move in the vertical direction, a translation mechanism (4) is provided on the transverse mechanism (3), the transverse mechanism (3) can drive the translation mechanism (4) to move left and right, a support base (5) is provided below the translation mechanism (4), a bridge steel structure is placed on the top of the support base (5), and symmetrical installations are provided on both sides of the support base (5). The extension bracket (6) and the movable welding frame (7) are connected to the support base (5) by transmission. The included angle between the two movable welding frames (7) is adjustable. The movable welding frame (7) is made up of multiple splicing sections connected end to end. An extension bracket (6) is installed at the bottom of each splicing section. A length adjustment bar (9) is connected between two adjacent extension brackets (6). An angle adjustment mechanism (8) is provided between the support base (5) and the movable welding frame (7). The angle adjustment mechanism (8) can adjust the included angle between the two movable welding frames (7). The splicing section includes a welded top plate (701), and four splicing slots (702) are provided on the upper surface of the welded top plate (701). One end of each splicing slot (702) is open and the opening is located on the end face of the welded top plate (701). A splicing rod (703) is fixedly connected to the other end face of the welded top plate (701). The splicing rod (703) can be inserted into the splicing slot (702). The welded top plate (701) is placed on the top surface of the supporting top plate (602), and the side of the welded top plate (701) is in contact with the surface of the limiting clamp (604). The welding top plate (701) and the limiting clamp (604) are connected by bolts. Two rows of fixed arm plates (704) are fixedly installed on the top surface of the welding top plate (701). The two rows of fixed arm plates (704) extend along the two side lines of the welding top plate (701). There are multiple fixed arm plates (704) in each row. The multiple fixed arm plates (704) are distributed at equal distances. The fixed arm plates (704) in the two rows correspond one to one. A transport roller (705) is installed between the two corresponding fixed arm plates (704). The bridge steel structure moves on the transport roller (705). The deflection mechanism (8) includes a deflection base plate (801), which is fixedly connected to the surface of the plasma arc welding machine (101) and located below the fixed horizontal plate (501). The bottom surface of the deflection base plate (801) is flush with the bottom surface of the plasma arc welding machine (101). A deflection motor (802) is bolted to the top surface of the deflection base plate (801). A deflection long arm (803) is fixedly sleeved on the output shaft of the deflection motor (802). An adaptation sliding hole (804) is provided on the deflection long arm (803). A deflection column (805) is movably inserted into the adaptation sliding hole (804). The top of the angled column (805) is fixedly connected to the bottom surface of a welded top plate (701). The surface of the welded top plate (701) near the adjusting pad (504) has an arc surface (507). A T-shaped slide rail (506) is fixedly connected to the inner wall of the arc surface (507). The adjusting pad (504) is semi-circular in shape. A T-shaped slide rail (505) is provided on the arc surface of the adjusting pad (504). The T-shaped slide rail (506) is slidably inserted into the inside of the T-shaped slide rail (505). The inner wall of the arc surface (507) is slidably connected to the arc surface of the adjusting pad (504).

2. The positioning and welding equipment for bridge steel structures according to claim 1, characterized in that, The plasma arc equipment (1) includes a plasma arc welding machine (101) and a plasma arc welding head (103). A lifting mechanism (2) is fixedly installed on the plasma arc welding machine (101). The plasma arc welding machine (101) has an integrated hydraulic control system. The plasma arc welding head (103) is fixedly installed on a translation mechanism (4). The translation mechanism (4) can drive the plasma arc welding head (103) to move along the direction perpendicular to the paper. A support plate (102) is fixedly sleeved on the plasma arc welding head (103). A first positioning probe (104) and a second positioning probe are fixedly inserted on the support plate (102). The probe (105), the first positioning probe (104) and the second positioning probe (105) are located on both sides of the plasma arc welding head (103). The first positioning probe (104) and the second positioning probe (105) of the plasma arc welding head (103) are connected to the plasma arc welding machine (101) through the bundled pipeline (106). The plasma arc welding machine (101) is electrically connected to the first positioning probe (104) and the second positioning probe (105) through the bundled pipeline (106). The plasma arc welding machine (101) is connected to the material transfer of the plasma arc welding head (103) through the bundled pipeline (106).

3. The positioning and welding equipment for bridge steel structures according to claim 2, characterized in that, The lifting mechanism (2) includes two supporting base plates (201), which are located on both sides of the plasma arc welding machine (101). The supporting base plates (201) are fixedly connected to the side of the plasma arc welding machine (101) and located at its bottom. A lifting screw (202) is movably sleeved on the top surface of the supporting base plate (201). A supporting top plate (203) located on the top of the lifting screw (202) is movably sleeved on the outside of the lifting screw (202). The supporting top plate (203) is fixedly connected to the side of the plasma arc welding machine (101) and located on its top. A supporting top plate (203) located on the top of the lifting screw (202) is fixedly sleeved on the outside of the lifting screw (202). The transmission gear (204) at its top is connected to the drive gear (206) via the transmission hole belt (205). The drive motor (207) is fixedly installed on the drive gear (206). The drive motor (207) is fixedly installed inside the plasma arc welding machine (101). The lifting screw (202) is threaded with a short threaded tube (208) located between the bearing base plate (201) and the bearing top plate (203). The short threaded tube (208) is fixedly fitted with a moving lever arm (209). The moving lever arm (209) is fixedly connected to the transverse mechanism (3).

4. The positioning and welding equipment for bridge steel structures according to claim 3, characterized in that, The transverse mechanism (3) includes a device plate (301), which is fixedly connected to two moving arms (209). A first side strip (302) and a second side strip (303) are fixedly connected to the bottom surface of the device plate (301). The first side strip (302) and the second side strip (303) are located on both sides of the device plate (301). Two transverse sliding rods (304) are fixedly connected between the first side strip (302) and the second side strip (303). A transverse base (305) is provided between the first side strip (302) and the second side strip (303). A transverse through hole is provided on the transverse base (305). (306) The transverse sliding rod (304) is slidably inserted into the transverse through hole (306). The transverse base (305) has an internal threaded hole (307) located in the middle. The transverse screw (308) is movably inserted into the internal threaded hole (307). The transverse screw (308) is threadedly engaged with the internal threaded hole (307). One end of the transverse screw (308) is rotatably inserted into the second side strip (303). The other end of the transverse screw (308) passes through the first side strip (302) and is fixedly connected to the transverse motor (309). The transverse motor (309) is bolted on the first side strip (302).

5. A positioning and welding device for bridge steel structures according to claim 4, characterized in that, The translation mechanism (4) includes a T-shaped groove (401), which is opened on the surface of the transverse base (305) away from the equipment plate (301). A T-shaped base (402) is slidably inserted into the T-shaped groove (401). A translation threaded hole (403) is opened on the side of the T-shaped base (402). A translation screw (404) is movably inserted into the translation threaded hole (403). The translation screw (404) is threadedly engaged with the translation threaded hole (403). One end of the translation screw (404) is movably sleeved on the inner wall of the T-shaped groove (401). The other end of the translation screw (404) extends to the outside of the transverse base (305) and is fixedly connected to a translation motor (405). The translation motor (405) is bolted to the end face of the transverse base (305).

6. A positioning and welding device for bridge steel structures according to claim 5, characterized in that, The support base (5) includes a fixed horizontal plate (501), which is fixedly connected to the surface of the plasma arc welding machine (101). A fixed sliding hole (502) is provided on the fixed horizontal plate (501), and an adjusting sliding rod (503) is movably inserted into the fixed sliding hole (502). An adjusting pad (504) is fixedly connected to the top of the adjusting sliding rod (503), and the bridge steel structure is placed on the top surface of the adjusting pad (504).

7. A positioning and welding device for bridge steel structures according to claim 6, characterized in that, The extension bracket (6) includes two bracket arm plates (601), and a lifting top plate (602) is fixedly connected between the two bracket arm plates (601). A movable welding frame (7) is placed on the top surface of the lifting top plate (602). A caster wheel (603) is fixedly installed on the bottom surface of the bracket arm plate (601). A limit clamp plate (604) is fixedly connected to the top of the bracket arm plate (601). A fixed pad plate (605) and a movable pad plate (606) are respectively provided on the two adjacent surfaces of the two limit clamp plates (604). The fixed pad plate (605) is bolted to the limit clamp plate (604). Elastic pads (607) are fixedly installed on the two adjacent surfaces of the movable pad (606). The elastic pads (607) are clamped on the surface of the bridge steel structure. A guide slide rod (608) is fixedly installed on the surface of the movable pad (606) away from the elastic pad (607). The guide slide rod (608) slides through the limiting clamp (604). A clamping telescopic rod (609) is bolted to the surface of the limiting clamp (604) away from the movable pad (606). The end of the extension rod in the clamping telescopic rod (609) passes through the limiting clamp (604) and is fixedly connected to the surface of the movable pad (606).

8. A positioning and welding device for bridge steel structures according to claim 7, characterized in that, A reinforcing partition plate (610) located below the lifting top plate (602) is fixedly connected between the two bracket arm plates (601). Two balance holes (611) are provided on the reinforcing partition plate (610). A balance plate (612) is movably inserted inside the balance hole (611). A load-bearing plate (613) is fixedly connected to the bottom end of the balance plate (612). A receiving through hole (614) is provided on the load-bearing plate (613). A caster wheel (603) is located inside the receiving through hole (614). A lifting telescopic bar (615) is bolted to the top surface of the reinforcing partition plate (610). The end of the extension rod in the lifting telescopic bar (615) passes through the reinforcing partition plate (610) and is fixedly connected to the surface of the load-bearing plate (613).

9. A method for positioning welding of bridge steel structures, using the positioning welding equipment for bridge steel structures as described in claim 1, characterized in that, Includes the following steps: Step 1: Place the two bridge steel structural components to be welded on the two movable welding frames (7) respectively; Step 2: Use plasma arc equipment (1) to start welding; The third step is to stop the welding work of the plasma arc equipment (1) when the welding is completed, and then remove the welded bridge steel structure.

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