WO2019228304A1

WO2019228304A1 - Manufacturing tool for welding u-shaped rib of orthotropic plate unit, and assembly line and method

Info

Publication number: WO2019228304A1
Application number: PCT/CN2019/088579
Authority: WO
Inventors: 汪小根
Original assignee: 湖北天高桥梁工程有限公司
Priority date: 2018-05-28
Filing date: 2019-05-27
Publication date: 2019-12-05

Abstract

Disclosed is a manufacturing tool for welding a U-shaped rib of an orthotropic plate unit (100). The invention comprises: an assembly line having a moving base (101), wherein the moving base is sequentially provided, in the direction in which the assembly line moves, with a welding preparation zone (1010), a fixing zone (1011), an assembling zone (1013), a welding zone (1012) and a traction zone (1014), the assembling zone being located between the fixing zone and the welding zone. A steel plate enters the welding preparation zone, and a rust removal and polishing device performs rust removal and polishing on an area to be welded of the steel plate; a front end of the steel plate enters the moving base from one end of the fixing zone, and the steel plate longitudinally moves forwards until a rear end of the steel plate passes through the fixing zone; after the entire steel plate enters the assembling zone, a U-shaped rib is hoisted onto the steel plate, and the U-shaped rib and the steel plate are assembled; and the steel plate and the U-shaped rib longitudinally move forwards together, and an inside welding gun head performs, starting from the front end of the steel plate, inside welding for the orthotropic plate unit. The tool significantly improves the production efficiency of the U-shaped rib plate unit, realizes full-penetration welding, improves the welding quality, and effectively resolves fatigue damage to a steel bridge deck plate. An assembly line for manufacturing an orthotropic plate unit and a method for welding a U-shaped rib of an orthotropic plate unit are further disclosed.

Description

U-rib welding manufacturing tool, assembly line and method for orthotropic plate unit

Technical field

The present invention relates to the field of welding, and in particular to a U-rib welding manufacturing tool, assembly line, and welding method for orthotropic plate units.

Background technique

The U-rib plate unit includes a U-rib and a bottom plate (that is, a steel plate). The closed U-rib is slender and narrow. Its length is usually more than 12m, and the cross-sectional size is generally less than 300mm × 300mm. It is difficult to weld the inner corner of the U-rib. In the prior art, single-sided welding can be used for welding U-ribs on the bottom plate. This welding method is mostly based on CO ₂ gas shielded welding with a large bevel at the outer corner to achieve 80% penetration. When the outer welding current is small Or the gun tip is offset, the arc cannot reach 80% penetration. When the external welding current is too large, it is easy to break through the molten pool and cause welding defects. There is a "prefabricated" crack at the weld root, and the stress is prominent. Under the alternating load of the wheel, the fatigue crack is very serious, causing the bridge deck to crack and difficult to repair. .

In the prior art, double-sided welding is also used to weld the U-rib to the bottom plate. Currently, welding equipment such as a welding trolley is used to enter the inside of the U-rib to weld the inner corner of the U-rib. Although this welding method is a single-sided welding method, The defects have been improved, and the stress at the weld root has been reduced, but the technical problems of the single-sided welding method still cannot be completely overcome: the inner fillet weld has no penetration depth, and the weld metal is attached to the bottom plate and U-rib web On both surfaces, full penetration welding of U-ribs cannot be achieved. Moreover, when the welding equipment enters the inside of the U-rib for internal fillet welding, the welding equipment needs to make a slow movement back and forth, that is, the welding equipment enters and walks from one end of the U-rib to the other end of the U-rib and then returns along the road. The U-rib is returned during the return process. Internal fillet welding, this "empty in and out" method reduces the production efficiency of U-rib units.

In addition, whether it is a single-sided welding method or a double-sided welding method, the U-rib welding needs to be manually polished and scribed in advance, which further reduces the production efficiency and quality stability of the U-rib plate unit.

Summary of the Invention

In view of the above defects or improvement needs of the prior art, the present invention provides a U-rib welding manufacturing tool, assembly line, and welding method for orthotropic plate unit, which can realize the assembly and welding integration, and can also disassemble the operations in sequence, greatly improving the U-rib. The production efficiency of the plate unit achieves full penetration welding and significantly improves the fatigue resistance of the welded panel.

In the present invention, "longitudinal" refers to the length direction of the orthotropic plate unit, and is also the length direction of the steel plate and U ribs. "Transverse" refers to the width direction of the orthotropic plate unit, and "vertical" or "vertical direction" refers to the orthotropic plate. The thickness direction of the steel plate of the unit. The “workpiece” appearing separately in the present invention refers to the U-rib and steel plate of the orthotropic plate unit, and the “orthotropic plate unit” in the present invention may refer to the overall structure of the steel plate and the U-rib, and may also refer to “ "Steel plate" or "U rib" as long as the meaning is clear.

The invention provides a U-rib welding manufacturing tool for an orthotropic plate unit. The orthotropic plate unit includes a steel plate and a U-rib. The tooling at least includes a moving base, an internal welding system, and a U-rib lifting device.

The moving base is used to support the orthotropic plate unit, and guide the orthotropic plate unit to move longitudinally. The moving base has a fixed area and a welding area in order along the moving direction. An assembly area is fixed between the fixed area and the welding area. Zone is used for fixed internal welding system, welding zone is used for welding gun welding, and assembly area is used for assembly of steel plates and U ribs;

The internal welding system includes a welding head, a connecting line, a power source, a control box, a welding wire tray or a welding wire barrel, the welding head has an internal welding gun head, and the connecting line includes a cable, a signal control line, a welding wire, and a power supply. In order to supply power to the internal welding system, the welding head is arranged in the welding zone; the connecting pipeline extends from the welding zone through the assembly zone to the fixed zone, and the cables, signal control wires, and welding wires are respectively connected to the power supply and the control box at one end of the fixed zone. , Welding wire drum or welding wire barrel connected;

The U-rib lifting device is used for hoisting a U-rib on a steel plate in an assembly area.

Specifically, the internal welding system further includes a fixing device, the fixing device includes a fixing frame and a connecting arm, the fixing frame is disposed in the fixing area, the length direction of the connecting arm is the same as the moving direction, and one end of the connecting arm It is connected with the fixed frame, and the other end is connected with the welding head.

Specifically, the connection pipeline is laid along a connection arm.

Specifically, the connecting arm includes a positioning guide and a connecting rod, and the outer shape of the positioning guide is trapezoidal.

Optionally, the internal welding system further includes a fixing device, the fixing device includes a fixing frame and a connecting line, the fixing frame is arranged in the fixing area, the fixing frame is relatively fixed to the ground, and the length direction of the connecting line is the same as the moving direction , One end of the connecting wire is connected to the fixed frame, and the other end is connected to the welding head.

Specifically, the internal welding system further includes a pipeline, and the cables and connecting wires of the internal welding system are arranged in the pipeline.

Specifically, it also includes a gantry, which is arranged in the welding area and spans above the moving base.

Specifically, it further includes a first positioning and locking device. The first positioning and locking device includes a U-rib side pressure mechanism, a U-rib opening limit mechanism, a compression mechanism, and a jacking mechanism; the U-rib side pressure mechanism and the clamping mechanism are installed. On the gantry, the U-rib opening limit mechanism is on the welding head. The U-rib side pressure mechanism is used to squeeze and position the U rib on the outside of the two webs of the U rib. The U-rib opening limit mechanism is used on the U rib. The U-ribs are expanded and restrained on the inner side of the web. The pressing mechanism is used to apply downward pressure on the top of the U-ribs. The pressing mechanism is used to apply a pressing force to the steel plate at the bottom of the steel plate.

Specifically, an external welding system is also included, and the external welding head of the external welding system is arranged on the gantry.

Specifically, a traction zone is provided after the welding zone. The traction zone has a moving base and a tractor. The tractor can be moved forward and backward along the moving base across the moving base. It also includes an auxiliary vehicle, which is arranged in the assembly area and assists the vehicle. Can walk back and forth in the assembly area.

Specifically, a steel plate lateral locator is also provided in the assembly area, and the steel plate lateral locator includes a front locator and a rear locator. The front locator is disposed at the front end of the assembly area, and the front end is close to the welding area and is disposed in the mobile area. On both sides of the base, the rear locator is set at the rear end of the assembly area. The rear end is an end near the fixed area and is located on both sides of the mobile base. The front end of the front locator is also provided with a steel plate longitudinal stopper and a U-rib stop位装置。 Bit devices.

Specifically, the fixing frame has a beam, and the beam has a slide plate. The slide plate can move laterally along the beam. One end of the connecting arm is connected to the slide plate, and the other end is connected to the welding head.

Specifically, the internal welding system further includes a welding head fixing device, the welding head fixing device is provided in the welding area, the welding head fixing device is provided on the gantry, one end is fixed to the gantry, and the other end is connected to the welding head, And it is detachably connected with the welding head for adjusting the vertical distance between the welding head and the moving base, and fixing the welding head.

Specifically, the internal welding system further includes a welding head support device, the welding head support device is disposed in a welding area, the welding head support device is disposed under a moving base, and the welding head support device may be in a vertical direction The upper telescopic, when the internal welding is about to be completed, when the welding head is exposed from the rear end of the steel plate, the welding head support device is extended, the top exceeds the height of the moving base, and contacts the bottom of the welding head to support the welding head.

The application also provides an orthotropic plate unit manufacturing assembly line, which includes the orthotropic plate unit U-rib welding manufacturing tool as described above, and further includes a welding preparation unit, which includes a rust removal and grinding device and a cutting device.

The application also provides a method for welding U-ribs of an orthotropic plate unit. The orthotropic plate unit includes a steel plate and a U-rib, and includes: a moving base. The moving base has a fixed area and a welding area in the moving direction in sequence. Between the fixed area and the welding area is an assembly area, and the method includes the following steps:

The steel plate enters the moving base so that the steel plate completely enters the assembly area. The front end of the steel plate is near one end of the welding area and the rear end of the steel plate is near one end of the fixed area.

Hang the U-rib on the steel plate with the U-rib opening facing down to complete the assembly of the U-rib and the steel plate;

The steel plate and the U rib move forward in the longitudinal direction together, and the internal welding torch head performs internal welding on the orthotropic plate unit from the front end of the steel plate.

Specifically, the steel plate entering the moving base in the welding method includes the following steps:

The front end of the steel plate enters the mobile base from one end of the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area.

The present application also provides a method for performing orthotropic plate unit U-rib welding manufacturing according to the above-mentioned orthotropic plate unit U-rib welding manufacturing tool, the method includes the following steps:

The steel plate enters the moving base so that the steel plate completely enters the assembly area. The front end of the steel plate is near one end of the welding area and the rear end of the steel plate is near one end of the fixed area. At this time, the steel plate is between the moving base and the connecting pipeline;

Hang the U-rib on the steel plate, with the U-rib opening facing down, to fasten the connecting pipeline;

The steel plate and the U rib move forward in the longitudinal direction together, and the inner welding torch head internally welds the U rib of the orthotropic plate unit from the front end of the steel plate.

The present invention also provides a method for performing orthotropic plate unit U-rib welding manufacturing according to the above-mentioned orthotropic plate unit U-rib welding manufacturing tool, the method includes the following steps:

The steel plate enters the moving base so that the steel plate completely enters the assembly area. The front end of the steel plate is near the end of the welding area and the rear end of the steel plate is near the end of the fixed area. At this time, the steel plate is between the moving base and the connecting arm.

Hang the U-rib on the steel plate, with the U-rib opening facing down and buckle the connecting arm;

The invention also provides a method for orthotropic plate unit U-rib welding manufacturing according to the above-mentioned orthotropic plate unit U-rib welding manufacturing tool, the method includes the following steps:

The front end of the steel plate enters the mobile base from the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area;

The steel plate completely enters the assembly area, the front end of the steel plate is near the end of the welding area, and the rear end of the steel plate is near the end of the fixed area; at this time, the steel plate is between the moving base and the connecting arm;

The steel plate and the U rib are moved forward along the longitudinal direction, and the spot welding of the U rib is performed at a distance in the welding zone. The steel plate and the U rib enter the traction area to complete the positioning of the U rib and the steel plate.

Further, the method further includes the following steps:

The positioned orthotropic plate unit is reversely translated from the traction area into the assembly area until the front end of the steel plate reaches the welding area, and the inner welding gun head is placed in the front abdominal cavity of the U rib;

The internal welding gun head performs internal welding on the U rib of the orthotropic plate unit from the front end of the steel plate.

The present application also provides a method for welding U-ribs of an orthotropic plate unit. The orthotropic plate unit includes a steel plate and a U-rib, and includes: an assembly line with a moving base; and a welding preparation area is sequentially provided along the moving direction of the assembly line on the moving base. , A fixed area, an assembly area, a welding area, and a traction area. The assembly area is between the fixed area and the welding area. The method includes the following steps:

The steel plate enters the welding preparation area, the length of the steel plate is consistent with the direction of the assembly line, the steel plate moves forward or back and forth, and the rust removal and grinding device grinds and grinds it;

The front end of the steel plate enters the moving base from one end of the fixed area, and the steel plate travels longitudinally to the rear end of the steel plate and passes through the fixed area;

After the steel plate completely enters the assembly area, the U rib is hoisted to the steel plate to complete the assembly of the U rib and the steel plate;

The steel plate and the U rib move forward along the longitudinal direction, and the internal welding torch head performs internal welding on the orthotropic plate unit from the front end of the steel plate until the rear end passes through the welding area.

Specifically, the method further includes: welding at the outside of the U-rib corner seam simultaneously or separately.

Specifically, the inner welding is submerged arc welding.

Compared with the prior art, the present invention has at least the following beneficial effects:

(1) First convey the steel plate to the welding area for positioning, then assemble the U rib, the welding gun is fixed, the plate unit does not need to move back and forth, and the workpiece can be moved in one direction to complete the welding. Improved welding efficiency and good welding quality.

(2) Through the way that the welding torch does not move and the workpiece moves, the assembly line operation can be completed. The assembly line is in place at one time, which reduces the reversal and repeated positioning of heavy workpieces in the workshop, and improves efficiency and welding quality.

(3) Through the specific internal welding fixing device, positioning locking device and traction positioning device to ensure the smooth movement of the steel plate, to achieve the completion of the welding at the same time, greatly improve product quality and labor efficiency.

(4) Only the workpiece moves and the complex welding device is fixed, which not only consumes less power, but also greatly reduces the failure rate of the welding equipment, making the production stable and reliable, and the welding quality is good.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a welding structure of an orthotropic plate unit;

2 is a schematic cross-sectional view of an orthotropic plate unit;

3 is a schematic diagram of an embodiment of a U-rib welding manufacturing tool of the orthotropic plate unit of the present invention;

4 is a schematic structural diagram of a first embodiment of a fixing device according to the present invention;

5 is a schematic structural diagram of a second embodiment of a fixing device according to the present invention;

6 is a schematic diagram of a gantry of the present invention;

7 is a schematic diagram of a first positioning and locking device according to the present invention;

8 is a schematic cross-sectional view of a first positioning and locking device according to the present invention;

9 is a schematic diagram of a U-rib welding manufacturing tool of the orthotropic plate unit of the present invention;

FIG. 10 is a schematic diagram of an embodiment of a welding pipeline according to the present invention.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1, it is a schematic diagram of a welding structure of an orthotropic plate unit. The orthotropic plate unit includes a steel plate 1 and a U-rib 2. In actual use, the steel plate 1 faces upward and the U rib 2 is below. FIG. 2 is a schematic cross-sectional view of an U-rib assembly of an orthotropic plate unit. Steel plate 1 is a structural steel with a thickness B1 ≥ 12mm. The performance and processing accuracy should meet the relevant industry standards such as the State and the Ministry of Transport. U rib 2 is structural steel, its thickness should be B2≥6mm, height H≥250mm, upper mouth width Wa≥250mm, lower bottom width Wb≥150mm, rolled or cold-formed, performance and processing accuracy should meet the country and transportation Relevant industry standards such as the Ministry of Transport, both sides of the lower corner of the U-rib can be opened or beveled. According to the design requirements, the U ribs are positioned on the steel plate, and the U ribs and the steel plate are as close as possible. After the U-rib is positioned on the steel plate, the corner seam is welded, and the weld is inspected according to the design requirements and relevant weld inspection procedures to check the quality of the weld.

The invention provides a welding manufacturing tool and method for the orthotropic plate unit.

FIG. 3 is a schematic diagram of an embodiment of a U-rib welding manufacturing tool for an orthotropic plate unit according to the present invention. The tooling includes at least: a moving base 101, an internal welding system, and a U-rib lifting device (not shown in the figure). The moving base 101 is used to support the orthotropic plate unit 100 and guide the orthotropic plate unit 100 to move in the longitudinal direction. The moving base can consist of rollers (as shown in the figure) or slides. The steel plate 1 of the orthotropic plate unit 100 is placed on a roller table or slideway and can be moved along the roller table or slideway. The roller or slideway itself may be driven without driving. The steel plate 1 and the U rib 2 of the orthotropic plate unit 100 are driven by other driving devices, such as a power cart. The slide rail or roller table may also have its own driving device, such as a drive motor, etc., to provide a certain speed to the roller table or roller table to drive the orthotropic plate unit 100 to move. The specific driving method and form of the moving base 101 are not strictly limited, and only the workpiece needs to be moved. The moving base 101 has a fixed area 1011 and a welding area 1012 in order along the moving direction. An assembly area 1013 is located between the fixed area 1011 and the welding area 1012. The fixed area 1011 is used for fixing the internal welding system, and the welding area 1012 is used for welding gun application. Welding, assembly area 1013 is used for assembling steel plate 1 and U rib 2. According to the length of the steel plate and the U rib and the assembly needs, the length of the assembly area is not less than the length of the U rib. U-rib hoisting device is used to hoist U-rib on steel plate for assembly. The U-rib lifting device may be a lifting device such as a gantry crane. The internal welding system of the present invention includes at least a welding head 1021, a connecting pipeline 1022, and a power source 1023. The welding head has an internal welding torch head. The power source 1023 supplies power to the welding head 1021 through a cable in the connection line 1022. The welding head 1021 is disposed in the welding area, and the welding head is not moved relative to the ground during welding. The connection pipeline 1022 extends through the assembly area 1013 to the fixed area 1011, and is connected to a power source and other equipment at one end of the fixed area.

The method for welding and manufacturing an U-rib of an orthotropic plate unit according to the present invention includes the following steps:

The steel plate enters the moving base, so that the front end of the steel plate is near one end of the welding area and the rear end of the steel plate is near one end of the fixed area; the steel plate is under the internal welding head and the connecting pipeline;

The U-rib lifting device lifts the U-rib to the steel plate along the connecting pipeline, and the U-rib and the steel plate are assembled;

By using the welding manufacturing method of the U-ribs of the orthotropic plate unit of the present invention, during internal welding, the workpiece of the orthotropic plate unit or the inner welding head does not need to move back and forth. After the assembly is completed, the steel plate and the U-ribs move in one direction. Can complete internal welding, convenient and efficient, and good welding quality.

There are various ways of fixing the internal welding system, and the internal welding system can be fixed by a fixing device. The following are specific examples of the fixing device.

As shown in FIG. 4, the first embodiment of the fixing device is: the fixing device 200 includes a fixing frame 2001 and a connecting arm 2002. The fixing frame 2001 is disposed in a fixed area. The fixing frame 2001 is relatively fixed to the ground. The direction (the direction of the arrow in FIG. 10) is the same. One end of the connecting arm 2002 is connected to the fixing frame 2001 and the other end is connected to the welding head 1021. Specifically, the fixing frame has a cross beam 2011, one end of the connecting arm 2002 is connected to the cross beam 2011, and the other end is connected to the welding head 1021. The length direction of the connecting arm is the same as the U-rib welding movement direction. In order to facilitate the steel plate to enter the assembly area, there is a gap between the beam and the moving base, and the gap is greater than the thickness of the steel plate. In order to enable the U-ribs to be completely placed on the steel plate and complete the assembly in the assembly area, the length of the connecting arm is greater than the U-rib length. In this embodiment, in order to achieve a better fixing effect and keep the position of the internal welding head unchanged, the connecting arm should preferably adopt a structure with higher rigidity. For example, the truss structure shown in FIG. 4 is used. The truss structure consists of profiled steel or steel rods.

FIG. 5 shows another preferred structure of the connecting arm. The connecting arm 2002 includes a positioning guide 2012 and a connecting rod 2022. The connecting rod 2022 is a rigid structure. The outer peripheral shape of the positioning guide 2012 is the same as the cross-sectional shape of the U-rib internal cavity, and is trapezoidal. Each connecting arm 2002 has four connecting rods 2022, which are distributed on the four corners of the positioning guide 2012. There are multiple positioning guides 2012, which are distributed on the connecting rod according to the length and positioning needs of the connecting rod 2022. The connecting arm of this structure has good rigidity, which can improve the fixing effect of the welding head. The shape of the positioning guide plate is the same as that of the U-rib section. The U-rib can be roughly positioned horizontally during assembly and welding, and the positioning is fast and convenient.

Since it is necessary to continuously supply power to the welding head, supply welding wires, and control welding of the welding head, it is necessary to connect a connection pipeline between the fixed area and the welding area. The connection pipeline includes cables, signal control lines, welding wires, auxiliary pipelines, etc. The power supply is used to power the internal welding system, and the connecting pipeline extends from the welding area through the assembly area to the fixed area. One end is connected to the welding head, and the other end is connected to a power supply, a control box, a wire tray or a wire barrel, etc. The power supply, a control box, a wire tray or a wire barrel is provided at one end of the fixed area. The cables, signal control wires, and welding wires are respectively connected to a power source, a control box, a welding wire tray or a welding wire barrel at one end of the fixed area.

When assembling and welding U-ribs and steel plates, these connecting pipelines are discharged in the narrow space between U-ribs and steel plates, and can not be discharged and wound randomly. The use of a rigid structure of the connecting arm to adapt its length to the length of the U rib, and installing the connecting arm between the fixed area and the welding area, and then laying various pipelines along the connecting arm, can ensure that each pipeline is always Without moving, it can stably provide the internal welding machine with various electric energy, flux and wire raw materials required for welding, ensuring the normal welding of the internal welding machine, and its stability and welding effect can be effectively guaranteed.

The connecting arm can also be set as a telescopic structure, which can be adaptively adjusted according to the length of the U rib to meet more needs. According to the number of U ribs, there may be multiple connecting arms, generally 4-6, and the welding head connected to one end of each connecting arm has a pair of internal welding torch heads. Simultaneously weld the inner corner seams on both sides of multiple U ribs.

Each connection line of the welding head is set through the fixing device, so that the internal welding machine can perform welding work inside the U-rib. By installing the fixing device, various cables, pipes, welding wires and other pipelines required by the internal welding machine can be arranged in the connecting arm, and some of the pipelines can be arranged in the connecting arm, and some of the pipelines can be arranged outside the connecting arm, or Wire trunking, the pipeline is set by connecting arms and wire trunking.

As shown in Figs. 6-8, the manufacturing tool of the present invention further includes a gantry 300, which is disposed in the welding area (the welding head is not shown in Fig. 6) and spans above the moving base. The first positioning and locking device 3001 includes a U-rib side pressing mechanism 3021 sandwiched on both sides of the U-rib 2, a U-rib opening stop mechanism 3041 provided on the welding head 1021, a pressing mechanism 3011 on the top of the U-rib 2, and a steel plate. 1bottom tightening mechanism 3031. In the welding zone, the U-rib side pressing mechanism 3021 and the U-rib opening limiting mechanism 3041 in the U-rib 2 cavity are pressed together to precisely position the U-rib web. The U-rib side pressing mechanism 3021 can be installed on the gantry 300. The U-rib opening limiting mechanism 3041 may be disposed on the fixing plate 1121 of the welding head 1021. The fixed plate 1121 includes a support pulley 1221 and a side pulley 1321. The support pulley 1221 and the side pulley 1321 are used to support the welding head and ensure the position of the welding gun. In addition, the top of the U rib 2 is pressed downward by the pressing mechanism 3011, and the pressing force of the steel plate lower pressing mechanism 3031 is applied to the steel plate 1 upward. At this time, the spot welding of the U rib 2 and the steel plate 1 is completed to complete each U-rib 2 and spot welding on both sides of the front end of steel plate 1. The pressing mechanism 3011 may be provided on the gantry. The lower end of the pressing mechanism 3011 is a roller. When compacted, the roller comes into contact with the top of the U-rib 2 to facilitate the U-rib movement. The U-rib side pressure mechanism 3021 and the pressing mechanism 3011 may be driven by a cylinder or a hydraulic pressure, or may be driven by a servo motor. The side where the U-rib side pressure mechanism 3021 contacts the U-rib web is in a wedge shape and can be in close contact with the U-rib web. The jacking mechanism 3031 can be a roller shaft and can rotate. When the jack is tightened, the roller shaft contacts the steel plate 1 to facilitate the movement of the steel plate.

In addition, the welding manufacturing tool of the present application may further include an external welding system. The outer welding head of the outer welding system is disposed on the gantry 300. The outer welding head has an outer welding gun head. At the same time as internal welding, external welding can be performed at the same time. Or according to the needs, welding on the outside of the U-rib corner joint alone. At the same time, welding is performed on the inside and outside of the U-rib corner seam, and the welding quality is high. Double-sided welding is completed in one process. The production efficiency is high, the welding energy consumption is small, and the workpiece thermal deformation is small.

As shown in FIG. 9, the welding manufacturing tool of the present application is provided with a traction area 1014 after the welding area, and the traction area has a moving base 101. The towing area 1014 also includes a towing vehicle 4001 that moves across the moving base 101 back and forth along the moving base 101. During welding, the tractor 4001 clamps the workpiece and pulls the workpiece forward.

The welding manufacturing tool of the present application further includes an auxiliary vehicle 4002, which is disposed in the assembly area 1013. The auxiliary vehicle has its own power to walk back and forth in the U-rib assembly area 1013, and is responsible for pushing the steel plate into place, pushing the U-rib in place, holding the steel plate and the U-rib together to move forward. The auxiliary vehicle 4002 travels in a straight line to prevent the steel plate from swinging. When the size error of each U rib is small and consistent, the tractor 4001 can continuously and smoothly pull the front end of the workpiece of the orthotropic plate unit, and the auxiliary vehicle 4002 clamps the steel plate and the U rib at the tail of the orthotropic plate unit. The front end is pulled by a tractor, and the rear end is supported by an auxiliary vehicle. The front and rear two vehicles are driven on the same parallel track, so that the linear movement of the workpiece is not twisted and swung. Preferably, the tractor 4001 and the auxiliary vehicle 4002 travel within a preset slide rail. When the workpiece is welded through the welding zone, the tractor 4001 and the auxiliary vehicle 4002 advance at a certain speed to ensure that the workpiece is welded at the set speed, and the welding quality is stable and reliable.

Specifically, a horizontal positioner for the steel plate is further provided in the assembling area 1013, and the left and right positions of the steel plate workpiece are determined by the positioner, and the longitudinal centerline of the steel plate is adjusted to be parallel to the central axis of the moving base. The steel plate lateral positioner includes a front positioner 5011 and a rear positioner 5021. The front locator 5011 and the rear locator 5021 are arranged side by side and laterally. The front locator 5011 is disposed at the front end of the assembly area 1013, that is, close to the welding area side, and is provided on both sides of the mobile base 101, and the rear locator 5021 is disposed at the rear end of the assembly area 1013, that is, near the fixed area side, and is disposed in the mobile area. Both sides of the base 101. A steel plate longitudinal limiter and a U-rib limiter are also provided at the front end of the front positioner 5011. The steel plate longitudinal limiter and U-rib limiter are respectively used for longitudinal positioning of the steel plate and U-rib during assembly. When working, the auxiliary vehicle 4002 pushes the steel plate until the front end abuts the steel plate longitudinal limiter. The auxiliary vehicle 4002 pushes the U rib until the front end abuts the U rib limit device. The front locator 5011 and the rear locator 5021 clamp the front end and the rear end of the steel plate 1, respectively, and press them in the middle to realize the centering of the steel plate. The front positioner 5011 and the rear positioner 5021 may be driven by hydraulic pressure.

The operation steps of welding orthotropic plate unit according to the present invention are as follows:

The steel plate enters the assembly area so that the front end of the steel plate is near one end of the welding area and the rear end of the steel plate is near one end of the fixed area; the steel plate is under the connecting arm;

Hang the U rib along the connecting arm to the steel plate, and the U rib opening is buckled down on the connecting arm to complete the assembly of the U rib and the steel plate;

The steel plate and the U rib move forward along the longitudinal direction, and the internal welding gun head of the welding zone starts internal welding of the orthotropic plate unit from the front end of the steel plate.

Specifically, the present invention also provides a welding manufacturing line for an orthotropic plate unit.

As shown in FIG. 10, the assembly line includes the welding manufacturing tool for the above-mentioned orthotropic plate unit. It also has a welding preparation area 1010 at the beginning of the assembly line and a moving base 101 at the welding preparation area 1010. The welding preparation area 1010 further includes a welding preparation unit, and the welding preparation unit includes a rust removing and grinding device and a cutting device. The rust-removing and grinding device may be a wire roller or a belt grinder, a grinding wheel, or the like. The rust-removing and grinding device is installed at the upper part of the steel plate preparation area, and is used for cleaning and rust-removing the welding area of the moving steel plate 1 to meet the welding conditions. The left and right sides of the steel plate preparation area are provided with cutting devices for cutting the bevel of the steel plate to be welded. In the steel plate preparation area, preparation processes such as steel plate cutting, grinding and rust removal can be completed. As in the assembly area 1013, a steel plate lateral positioner is also provided in the welding preparation area 1010. The steel plate can be driven by the trolley in the welding preparation area, or it can be driven by the driving device of the moving base.

Preferably, the internal welding system further includes a welding head fixing device. The welding head fixing device is disposed in the welding area, and is mainly used to adjust the vertical distance between the welding head 1021 and the moving base 101 and the lateral position of the welding head, and fix the welding head. Before the internal welding starts, the welding head 1021 can be fixed and a certain gap can be provided between the welding head 1021 and the moving base 101, thereby facilitating the insertion of the steel plate 1. After the steel plate 1 enters the assembly area 1012, the welding head fixing device is disconnected from the welding head 1021, and the welding head 1021 is positioned on the steel plate 1. The welding head fixing device is arranged on the gantry 300, one end is fixed to the gantry, the other end is connected to the welding head, and is detachably connected to the welding head. The welding head is fixed in advance by the welding head fixing device, which can facilitate the positioning of the welding head, prevent deformation of the connecting arm, and facilitate the entry of the steel plate. The horizontal position of the welding head on the gantry can be adjusted. When it is necessary to adapt to different U-rib spacing, the welding head fixing device can be adjusted laterally, so that the welding head can be adjusted and fixed in different positions. When the horizontal position of the welding head needs to be fine-tuned because of the U-rib error, This can be achieved by fine adjustment of the welding head.

Specifically, the internal welding system further includes a welding head support device, the welding head support device is disposed in a welding area, the welding head support device is disposed under a moving base, and the welding head support device may be in a vertical direction The upper telescopic, when the internal welding is about to be completed, when the welding head is exposed from the rear end of the steel plate, the welding head support device is extended, the top exceeds the height of the moving base, and contacts the bottom of the welding head to support the welding head. The welding head support device can be a hydraulic cylinder that can be moved up and down. With this welding head support device, when the welding head is about to be completed, the welding head part protrudes from the rear end of the steel plate to ensure the stability of the welding head, thereby preventing The welding gun deviates to ensure the welding quality.

Preferably, the connection between the connecting arm and the fixed frame can adopt a movable connection, that is, there is a degree of freedom between the connecting arm and the fixed frame. The connecting arm can rotate around the beam of the fixed frame. This facilitates the lifting and adjustment of the welding head fixing device to the welding head. In order to facilitate lateral adjustment and adapt to U-rib welding at different intervals, there is a slide plate on the beam. The slide plate can be moved laterally along the beam. One end of the connecting arm is connected to the slide plate and the other end is connected to the welding head. The lateral distance can be adjusted through the skateboard, and the lateral distance of the connecting arm can be adjusted to adapt to U-rib welding with different distances. The slide plate can adjust the lateral position of the internal welding system simultaneously with the welding head fixing device.

Alternatively, the second embodiment of the fixing device does not use a rigid connecting arm, and replaces the connecting arm with a flexible connecting device, such as a connecting wire. Specifically, the fixing device includes a fixing frame and a connecting line. The fixing frame is arranged in a fixed area. The fixing frame is relatively fixed to the ground. The length of the connecting line is the same as the welding movement direction. One end of the connecting line is connected to the fixing frame and the other end is connected to the welding. Handpiece. Specifically, the fixing frame has a cross beam, one end of the connection line is connected to the cross beam, and the other end is connected to the welding head. In order to facilitate the steel plate to enter the assembly area, there is a gap between the beam and the moving base, and the gap is larger than the thickness of the steel plate. In order to allow the U-rib to be completely placed on the steel plate, the length of the connecting line is greater than the length of the U-rib. In this embodiment, the function of the connecting line is mainly to play a role of longitudinal limit. The connecting line is not extendable in the length direction, so the longest distance between the welding head and the fixed frame can be limited, and the welding head can be positioned longitudinally. Prevent the welding head from moving with the orthotropic plate unit during welding.

As for the arrangement of each pipeline, the flexible connection device and each connection pipeline of the welding head can be set through pipelines, and various cables, pipes, welding wires and other pipelines required by the internal welding machine can be arranged in the flexible pipe. The flexible pipe supplies power for the internal welding machine to ensure the welding conditions of the internal welding machine, so that the internal welding machine can perform welding work inside the U rib. The function of the pipeline is to centralize the connecting pipelines together so that they can be neatly arranged without winding, which facilitates the steel plate to enter the mobile base and U-rib assembly.

In this embodiment, the internal welding system also includes the welding head fixing device in the above embodiment.

In fact, the rigid connecting arm in the first embodiment of the fixing device may also be a flexible rod or a flexible tube, as long as the flexible rod or the flexible tube has less deformation in the length direction and can limit the longitudinal position of the welding head.

The welding manufacturing method of the assembly line orthotropic plate unit 100 of the present application is:

Steel plate 1 enters the welding preparation area 1010 at the beginning of the assembly line. The length direction of the steel plate is consistent with the assembly line direction. The steel plate moves forward or back and forth to complete the welding preparation work.

The front end of the steel plate 1 passes through the fixed area 1011 and enters the assembly area 1013;

The steel plate 1 travels along the assembly line to the rear end of the steel plate and passes through the fixed area 1011;

After the steel plate 1 completely enters the assembly area 1013, the U rib 2 is hoisted to the steel plate 1, and the U rib 2 is assembled with the steel plate 1;

The steel plate 1 and the U rib 2 continue to move forward, and the inner welding torch head starts to weld the steel plate 1 and the U rib 2 from the front end of the steel plate 1.

Specifically, the welding manufacturing method of the orthotropic plate unit 100 of the present application will be described below with reference to the drawings.

The steel bridge panel workpiece, that is, steel plate 1, is moved to the welding preparation area 1010 at the beginning of the assembly line. The length direction of the steel plate is consistent with the assembly line direction. The steel plate lateral positioner in the welding preparation area controls the width direction of the steel plate. The trolley drives the steel plate workpiece forward or reciprocating along the assembly line, and the steel plate is rusted and descaled by the rust removal and grinding device when the steel plate advances or reciprocates until it meets the welding and other process requirements, and then the steel plate 1 is transported to the U-rib assembly area 1013 along the assembly line. .

Specifically, the steel plate 1 moves forward, the steel plate 1 is inserted from below the crossbeam 2011, the front end passes through the fixed area 1011 and enters the assembly area 1013, and continues along the assembly line direction until the rear end of the steel plate passes the fixed area 1011. The steel plate 1 completely enters the U-rib assembly area 1013, and the auxiliary trolley 4002 pushes the steel plate 1 until the front end of the steel plate 1 comes into contact with the longitudinal stop of the steel plate and stops. At this time, the steel plate 1 is located below the connecting pipeline and also under the connecting arm 2002 or the pipeline, that is, between the connecting arm 2002 / pipe and the moving base 101. The front locator 5011 and the rear locator 5021 clamp the two sides of the steel plate 1 at the front and rear ends of the steel plate 1, respectively, and press them in the middle to realize the horizontal centering of the steel plate.

After positioning the front, back, left, and right positions of the steel plate, use a lifting device to lift the U rib to the steel plate. Specifically, several U-ribs can be hoisted one by one from the top to the bottom or placed at the same time using a tooling, and each U-rib opening is aligned downward to the connection arm 2002 or the pipe is dropped onto the steel plate 1 to fasten the connection pipeline.

The auxiliary vehicle 4002 moves each U-rib forward at the rear end of the U-rib 2 so that the front end of the U-rib contacts the U-rib stop device and terminates. At this time, the mutual position of the steel plate 1 and the U-rib 2 has been initially determined, and the steel plate and the U-rib are completed. Assembly. Specifically, when the connecting arm is used, the outer shape of the positioning guide plate is the same as the cross-sectional shape of the inner cavity of the U-rib, and the U-rib can be roughly positioned laterally during assembly, and the positioning is fast and convenient. No need to manually mark the positioning.

Auxiliary car 4002 clamps the steel plate and U-rib workpiece at the tail of the workpiece. At this time, the longitudinal stop of the steel plate and the U-rib stop device are disengaged. Welding zone 1012.

In the welding zone 1012, the U-rib side pressing mechanism 3021 and the U-rib opening limiting mechanism in the U-rib 2 cavity are used to squeeze the U-rib web plate accurately inside and outside. In addition, the top of the U rib 2 is pressed downward by the pressing mechanism 3011, and the pressing force of the steel plate lower pressing mechanism 3031 is applied to the steel plate 1 upward. At this time, the spot welding of the U rib 2 and the steel plate 1 is completed to complete the steel plate and Spot welding on both sides of the front end of each U-rib 2. After completing spot welding on both sides of the front end of each U-rib, fix the workpiece to the tractor 4001.

The front end of the workpiece is pulled by the tractor 4001, and the rear end is supported by the auxiliary vehicle 4002. The tractor 4001 and the auxiliary vehicle 4002 travel and drive on the same parallel track, ensuring that the linear motion of the workpiece does not distort and swing. When the workpiece passes through the welding area gantry 300, the size and positional relationship of each U rib is accurate.

Tractor 4001 continuously and smoothly pulls the workpiece forward, while the workpiece is walking, each internal welding torch is continuously welded, or welding is synchronized with the outer welding, depending on the requirements of the board unit. The welding gun head welds the steel plate 1 and the U rib 2 from the front end of the workpiece until the rear end passes through the welding area.

After the welding is completed, the welded orthotropic plate unit 100 workpiece enters the traction area, the workpiece is moved to the assembly line platform, and the tractor 4001 quickly returns to the gantry to repeat the foregoing process.

In the above implementation method, the welding preparation area may also be set beside the mobile base, and the steel plate enters the assembly area from the side of the mobile base. When the welding preparation area is set next to the moving base, the steel plate moves laterally into the assembly area. Preferably, a lateral slide rail can be provided on the moving base to facilitate the steel plate to slide on the moving base. Correspondingly, the front end of the steel plate is on the side of the welding area, and the rear end of the steel plate is on the side of the fixed area. After the steel plate is removed from the welding preparation area, the steel plate is moved laterally into the assembly area until one side reaches the side limit device.

After the welding is completed, there is an inspection process. Weld inspection is divided into three parts: appearance quality, internal flaw detection, and mechanical properties. The appearance quality of the weld has an important effect on fatigue performance. There are no cracks, undercuts, pores, no welding slag, no slag inclusion, and smooth forming of the weld surface. Internal flaw detection uses ultrasonic testing. Mechanical properties, fillet welds generally do not require mechanical properties, and the problems of low toughness and super strength matching and high yield ratio of the weld are prominent. The present invention proposes "equal strength, equal toughness, equal life" and gives the corresponding indicators testing method. The U-rib welding that meets the above inspection requirements has effectively controlled the fatigue performance and truly achieved the goal of "full penetration, detectable and defect-free".

When the U-rib shape size error is large, the friction resistance is large when continuously passing the gantry U-rib side pressure mechanism 3021 and the welding quality is affected. In this case, tack welding can be performed before internal welding. That is, the workpiece is intermittently walked and stopped for tack welding. After the tack welding is completed, the front end of the workpiece is returned to the welding area to start internal welding or simultaneous internal and external welding. Specifically, when the workpiece is walking, the U-rib side pressure mechanism 3021 is released. When the workpiece stops, the U-rib 2 is pressed down by the pressing mechanism 3011 on the top of the U-rib 2 and the steel plate lower pressing mechanism 3031 exerts a pressing force on the steel plate 1 upward. The rib side pressure mechanism 3021 and the U rib opening limiting mechanism in the U rib 2 cavity jointly press the U rib webs inside and outside to accurately position the U rib ribs. At this time, the U ribs are spot-welded and fixed. Repeat the above operation at intervals. The welding interval is generally 300mm-500mm, and the spot welding length is 30mm-80mm. Since the pressing mechanism 3011 and the jacking mechanism 3031 function, the spot welding distance and the spot welding length can be relaxed without requiring strict restrictions, depending on the condition of the workpiece. set. After the spot welding is completed, the tractor 4001 quickly drives the workpiece back to the welding preparation position, that is, the front end of the workpiece is aligned with the welding torch. The workpiece that has been spot welded does not need to start the gantry U-rib side pressure mechanism 3021, only the tractor 4001 is required to pull the workpiece At the same time welding. The positioned orthotropic plate unit is reversely translated from the traction area into the assembly area until the front end of the steel plate reaches the welding area, and the internal welding gun head is placed in the abdominal cavity of the front end of the U rib. The U-ribs of the anisotropic plate unit are internally welded. The welding is completed until the back end passes through the welding area.

The steel plate of the invention first enters the assembly area, and then the U-rib assembly is performed, and the rough positioning is performed during assembly. After the assembly is completed, the welding area is accurately positioned and simultaneously welded, and the assembly welding is performed simultaneously. In view of the large errors in the shape and size of U ribs, tack welding is performed before internal welding, and after completion of tack welding, it is returned to the assembly area in reverse, and then internal and external fillet welding is performed on the workpiece.

The invention completes the welding of the workpiece steel plate and the U-rib parts of the workpiece to the plate unit. The traditional rust removal and sanding, scribing, positioning group butt, internal welding and external welding are turned into one line in one line, which greatly saves Site, labor, and energy consumption ensure quality and increase work efficiency by more than three times.

In order to achieve full penetration welding and avoid fatigue cracks, U-ribs are preferably hot-rolled. The material of the hot-rolled U-ribs is uniform. Before the U-ribs are assembled with the steel plate, a groove is opened at the lower end of the U-rib side web. Traditional cold-pressed bending U-ribs have plastic deformation in the two arc bending areas, the material becomes hard and brittle, and fatigue cracks are easy to occur if the surface is scratched or overheated. Hot-rolled U-ribs completely solve this problem, and make the thickness of U-rib steel plate achieve the ideal variable cross-section design requirements.

For the internal welding of the above-mentioned orthotropic plate unit, submerged arc welding is preferably used. Specifically, in order to solve the problem that the solder cannot be added inside the long U rib, the solder is pre-packed into a container, as shown in FIG. 3, which is a solder hopper. 1024, in the hopper bin 1024 along the length of the weld along the left and right sides of the lower part of the leak hole is set, the leak hole is opened to lay flux.

Utilizing the tooling assembly line and welding method of the present invention, a 1.6-3.2mm diameter submerged arc welding process is used for welding at the outer corners of the U ribs. The outer fillet meat and the inner fillet meat intersect to achieve full penetration, or The internal and external welding angle dimensions are approximately symmetrical, and the welding meat is the weld metal. The inner fillet welding gun is welded at the same time with the corresponding outer fillet welding gun with a distance of 0-200mm. The submerged arc welding process parameters are: internal welding, wire diameter 1.6mm, current 350A-450A, voltage 29V-33V, welding speed 450-550mm / min; external welding, wire diameter 1.6-3.2mm, current 400A-650A, voltage 29V-35V, welding speed 450-650mm / min. The U-rib groove to be welded is a natural groove. When welding the inner and outer corners at the same time, a flame gun is set in front of or behind the welding gun to heat the U-rib upper structure, so that the welding seam and the U-rib contraction are equal to prevent the structure from shrinking and deforming longitudinally due to the cooling of the welding seam.

Those skilled in the art can easily understand that the above description is only the preferred embodiments of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention, All should be included in the protection scope of the present invention.

Claims

An orthotropic plate unit U rib welding manufacturing tool, the orthotropic plate unit includes a steel plate and a U rib, characterized in that the tooling includes at least: a moving base, an internal welding system, and a U rib lifting device;

The moving base is used to support the orthotropic plate unit, and guide the orthotropic plate unit to move longitudinally. The moving base has a fixed area and a welding area in order along the moving direction. An assembly area is fixed between the fixed area and the welding area. Zone is used for fixed internal welding system, welding zone is used for welding gun welding, and assembly area is used for assembly of steel plates and U ribs;

The internal welding system includes a welding head, a connecting pipeline, a power source, a control box, a welding wire disc / wire barrel, the welding head has an internal welding gun head, and the connecting pipeline includes a cable, a signal control line, a welding wire, and a power supply. In order to supply power to the internal welding system, the welding head is arranged in the welding zone; the connecting pipeline extends from the welding zone through the assembly zone to the fixed zone, and the cables, signal control wires, and welding wires are respectively connected to the power supply and the control box at one end of the fixed zone. The wire reel / wire drum is connected;

The U-rib lifting device is used for hoisting a U-rib on a steel plate in an assembly area.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 1, wherein the internal welding system further comprises a fixing device, the fixing device includes a fixing frame and a connecting arm, and the fixing frame is disposed in the fixing area, The length direction of the connecting arm is the same as the moving direction, one end of the connecting arm is connected to a fixed frame, and the other end is connected to a welding head; the connecting pipeline is laid along the connecting arm.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 1, wherein the internal welding system further comprises a fixing device, the fixing device includes a fixing frame and a connecting line, and the fixing frame is arranged in the fixing area, The fixed frame is relatively fixed to the ground, and the length of the connecting line is the same as the moving direction. One end of the connecting line is connected to the fixed frame, and the other end is connected to the welding head. The internal welding system also includes pipes, connecting lines of the internal welding system and The connecting lines are all arranged in a pipeline.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 1, further comprising a gantry, the gantry being arranged in the welding area and spanning above the moving base; further comprising a first positioning and locking device, a first The positioning and locking device includes a U-rib side pressure mechanism, a U-rib opening limit mechanism, a pressing mechanism, and a jacking mechanism; the U-rib side pressure mechanism and the pressing mechanism are installed on the gantry, and the U-rib opening limit mechanism is on the welding head On the upper side, the U-rib side pressure mechanism is used for squeezing and positioning the U-ribs outside the U-rib webs, and the U-rib opening limit mechanism is used to expand and limit the U-ribs on the inner sides of the U-rib webs. It is used to apply downward pressure on the top of the U-rib, and the jacking mechanism is used to exert a pressing force on the steel plate at the bottom of the steel plate.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 4, further comprising an external welding system, wherein an external welding head of the external welding system is arranged on the gantry.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 1, characterized in that a traction zone is provided after the welding zone, the traction zone has a moving base and a tractor, and the tractor can be moved along the moving base across The moving base moves forward and backward; it also includes an auxiliary vehicle, which is arranged in the assembly area, and the auxiliary vehicle can walk forward and backward in the assembly area.
The orthotropic plate unit U-rib welding manufacturing tool according to claim 1, characterized in that a steel plate lateral locator is further provided in the assembly area, and the steel plate lateral locator includes a front locator and a rear locator, and the front locator is provided. At the front end of the assembly area, the front end is close to the welding area and is provided on both sides of the mobile base, and the rear positioner is located at the rear end of the assembly area, and the rear end is close to the fixed area and is located at both ends of the mobile base. On the side, a steel plate longitudinal limiter and a U-rib longitudinal limiter are also provided at the front end of the front positioner.
The U-rib welding manufacturing tool for an orthotropic plate unit according to claim 2, characterized in that the fixed frame has a cross beam with a slide plate on the cross beam, the slide plate can move laterally along the cross beam, and one end of the connecting arm is connected to the slide plate. Connect the other end to the welding head.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 4, wherein the internal welding system further comprises a welding head fixing device, wherein the welding head fixing device is arranged in a welding area, and the welding head The fixing device is arranged on the gantry, one end is fixed to the gantry, and the other end is connected to the welding head, and is detachably connected to the welding head, for adjusting the vertical distance between the welding head and the moving base, and fixing the welding head.
The U-rib welding manufacturing tool of the orthotropic plate unit according to claim 1, wherein the internal welding system further comprises a welding head support device, the welding head support device is disposed in a welding area, and the welding head The supporting device is arranged under the moving base. The welding head supporting device can be extended and contracted in the vertical direction. When the welding head is exposed from the rear end of the steel plate, the welding head supporting device is extended, and the top exceeds the height of the moving base and contacts the welding machine. The bottom of the head supports the welding head.
An orthotropic plate unit manufacturing assembly line, comprising the orthotropic plate unit U rib welding manufacturing tool according to any one of claims 1 to 10, further comprising a welding preparation unit, the welding preparation unit includes Descaling and grinding device and cutting device.
A method for welding an U-rib of an orthotropic plate unit, the orthotropic plate unit comprising a steel plate and a U-rib, further comprising: a moving base; the moving base has a fixed area and a welding area in order along the moving direction, An assembly area between the fixed area and the welding area, the method includes the following steps:

The steel plate enters the moving base so that the steel plate completely enters the assembly area. The front end of the steel plate is near one end of the welding area and the rear end of the steel plate is near one end of the fixed area.

Hang the U rib on the steel plate to complete the assembly of the steel plate and the U rib;

The steel plate and the U rib move forward in the longitudinal direction together, and the inner welding torch head internally welds the U rib of the orthotropic plate unit from the front end of the steel plate.
The welding method according to claim 12, wherein entering the steel plate into the moving base comprises the following steps:

The front end of the steel plate enters the mobile base from the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area.
A method for orthotropic plate unit U-rib welding manufacturing tooling according to claim 1, the method comprising the following steps:

The front end of the steel plate enters the mobile base from the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area;

The steel plate completely enters the assembly area, the front end of the steel plate is near the end of the welding area, and the rear end of the steel plate is near the end of the fixed area; at this time, the steel plate is between the moving base and the connecting pipeline;

Hang the U-rib on the steel plate, with the U-rib opening facing down, to fasten the connecting pipeline;

The steel plate and the U rib move forward in the longitudinal direction together, and the inner welding torch head internally welds the U rib of the orthotropic plate unit from the front end of the steel plate.
A method for orthotropic plate unit U-rib welding manufacturing tooling according to claim 2, the method comprising the following steps:

The front end of the steel plate enters the mobile base from the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area;

The steel plate completely enters the assembly area, the front end of the steel plate is near the end of the welding area, and the rear end of the steel plate is near the end of the fixed area; at this time, the steel plate is between the moving base and the connecting arm;

Hang the U-rib on the steel plate, with the U-rib opening facing down and buckle the connecting arm;

The steel plate and the U rib move forward in the longitudinal direction together, and the inner welding torch head internally welds the U rib of the orthotropic plate unit from the front end of the steel plate.
A method for orthotropic plate unit U-rib welding manufacturing tool according to claim 4, wherein the method comprises the following steps:

The front end of the steel plate enters the mobile base from the fixed area;

The steel plate moves forward in the longitudinal direction to the rear end of the steel plate and passes through the fixed area;

The steel plate completely enters the assembly area, the front end of the steel plate is near the end of the welding area, and the rear end of the steel plate is near the end of the fixed area; at this time, the steel plate is between the moving base and the connecting arm;

Hang the U-rib on the steel plate, with the U-rib opening facing down and buckle the connecting arm;

The steel plate and the U rib are moved forward along the longitudinal direction, and the spot welding of the U rib is performed at a distance in the welding zone. The steel plate and the U rib enter the traction area to complete the positioning of the U rib and the steel plate.
The method for welding and manufacturing U-ribs of an orthotropic plate unit according to claim 16, further comprising the following steps:

The positioned orthotropic plate unit is reversely translated from the traction area into the assembly area until the front end of the steel plate reaches the welding area, and the inner welding gun head is placed in the front abdominal cavity of the U rib;

The internal welding gun head performs internal welding on the U rib of the orthotropic plate unit from the front end of the steel plate.
A method for welding an U-rib of an orthotropic plate unit. The orthotropic plate unit includes a steel plate and a U-rib, and is characterized in that it includes: an assembly line with a moving base; and a welding preparation area is sequentially arranged along the moving direction of the assembly on the moving base. , A fixed area, an assembly area, a welding area, and a traction area. The assembly area is between the fixed area and the welding area. The method includes the following steps:

The steel plate enters the welding preparation area, the length of the steel plate is consistent with the direction of the assembly line, the steel plate moves forward or back and forth, and the rust removal and grinding device grinds and descales it;

The front end of the steel plate enters the moving base from one end of the fixed area, and the steel plate travels longitudinally to the rear end of the steel plate and passes through the fixed area;

After the steel plate completely enters the assembly area, the U rib is hoisted to the steel plate to complete the assembly of the steel plate and the U rib;

The steel plate and the U rib move forward along the longitudinal direction, and the internal welding gun head starts internal welding of the orthotropic plate unit from the front end of the steel plate until the rear end passes through the welding area;

Inner welding is completed.
The welding method of the U-ribs of the orthotropic plate unit according to any one of claims 12 to 18, further comprising: welding at the same time or separately from the outer edges of the U-rib corner seams.
The welding method for the U-ribs of the orthotropic plate unit according to any one of claims 12 to 18, wherein the inner welding is submerged arc welding.