Box girder positioning net framework automatic welding production line and production process

Abstract

This invention relates to an automated welding production line and process for box girder positioning mesh skeletons, belonging to the field of box girder positioning mesh welding technology. It includes a welding machine feeding mechanism, with a box girder positioning mesh welding machine for assembly welding operations located in the middle of the feeding mechanism. The box girder positioning mesh welding machine includes a welding machine main unit, an upper electrode mounting frame mounted on the upper part of the welding machine main unit, and a lower electrode mounting frame mounted in the middle of the welding machine main unit. The upper electrode mounting frame has a U-shaped structure, with both ends fixed to the welding machine main unit. The lower electrode mounting frame also has a U-shaped structure, with both ends fixed to the welding machine main unit. This invention has the following advantages: it enables the entire production line to have automatic feeding function, intelligent operation, and convenient use, greatly improving work efficiency. The steel bars are arranged in a crisscrossing mesh structure, achieving rapid positioning and improving processing efficiency.

Description

Technical Field

[0001] This invention relates to an automatic welding production line and process for box girder positioning mesh skeleton, belonging to the field of box girder positioning mesh welding technology. Background Technology

[0002] Positioning steel mesh for precast box girders of railway (e.g.) Figure 10 Prestressed ducts are auxiliary measures in prestressed construction, controlling the alignment of the prestressed ducts. Their construction accuracy has a significant impact on the quality and stress characteristics of precast box girders for railways.

[0003] Patent application number CN202222603105.9 discloses a box girder positioning mesh welding machine, characterized by comprising a welding machine main unit, an upper electrode mounting frame installed on the upper part of the welding machine main unit, and a lower electrode mounting frame installed in the middle of the welding machine main unit. The upper electrode mounting frame has a U-shaped structure, with both ends fixed to the welding machine main unit, and the lower electrode mounting frame also has a U-shaped structure, with both ends fixed to the welding machine main unit. This box girder positioning mesh welding machine can weld multiple connection points simultaneously, has high working efficiency, and is suitable for applications requiring high efficiency. However, the aforementioned box girder positioning mesh welding machine has the following drawback: while it can weld multiple connection points simultaneously, it lacks a good automatic feeding effect.

[0004] Patent CN202220612355.6 discloses a resistance welding machine, including a frame, a worktable mounted on one side of the frame, a lower electrode clamp mounted on the top of the worktable, a column mounted on one side of the frame, and a mounting base fixedly mounted on one side of the frame. An ultrasonic component is mounted on the mounting base, and an upper electrode is located below the ultrasonic component. Four movable plates are slidably mounted inside the lower electrode clamp, and an arc-shaped clamping plate is mounted on one side of the movable plates. It can be seen that the following defects exist in use: traditional resistance welding machines are all single welding stations, which are not suitable for multi-point welding of positioning mesh, and the welding efficiency is slow.

[0005] Therefore, there is an urgent need to design an automated welding production line and process for the box girder positioning mesh skeleton to solve the above problems. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: to solve one of the above problems, to provide an automatic welding production line and production process for box girder positioning mesh skeleton, so that the entire production line has an automatic feeding function and can weld multiple connection points at the same time, with high working efficiency, suitable for places with high efficiency requirements, intelligent operation, and convenient use, which greatly improves working efficiency.

[0007] The automatic welding production line for box girder positioning mesh skeleton of the present invention is characterized in that: it includes a welding machine feeding mechanism, and a box girder positioning mesh welding machine for assembly welding operation is provided in the middle of the welding machine feeding mechanism. The box girder positioning mesh welding machine includes a welding machine host, an upper electrode mounting frame installed on the upper part of the welding machine host, and a lower electrode mounting frame installed in the middle of the welding machine host. The upper electrode mounting frame has a U-shaped structure, and both ends of it are fixed to the welding machine host. The lower electrode mounting frame has a U-shaped structure, and both ends of it are fixed to the welding machine host. Multiple sets of vertical first lifting upper resistance welding guns are arranged at intervals on the inner side of the first side of the upper electrode mounting frame. Multiple sets of vertical second lifting upper resistance welding guns are arranged at intervals on the inner side of the second side of the upper electrode mounting frame. Multiple sets of vertical first lifting lower resistance welding guns that cooperate with the first lifting upper resistance welding guns are arranged at intervals on the inner side of the first side of the lower electrode mounting frame. Multiple sets of vertical second lifting lower resistance welding guns that cooperate with the second lifting upper resistance welding guns are arranged at intervals on the inner side of the second side of the lower electrode mounting frame.

[0008] A conveyor track is set between the upper electrode mounting frame and the lower electrode mounting frame. The pre-assembled parts to be welded are transported to the welding station between the upper electrode mounting frame and the lower electrode mounting frame via the conveyor track. The first and second lifting resistance welding guns descend simultaneously, and the first and second lifting resistance welding guns rise simultaneously. The resistance welding guns of the first and second lifting resistance welding guns and the second lifting resistance welding guns move closer to each other to weld the parts to be welded in the area to be welded. By having multiple sets of first and second lifting resistance welding guns, first and second lifting resistance welding guns, and second lifting resistance welding guns work together to assemble and weld the box girder positioning mesh, multiple connection points can be welded at the same time. The work efficiency is high and it is suitable for places with high efficiency requirements.

[0009] Furthermore, the welding machine feeding mechanism includes a rebar welding positioning fixture traveling frame and a support frame for supporting the rebar welding positioning fixture traveling frame. The support frame includes a first end traveling bracket, an inner traveling bracket A, an inner traveling bracket B, and a second end traveling bracket that are parallel to each other and used to support the rebar welding positioning fixture traveling frame. The first end traveling bracket, the inner traveling bracket A, the inner traveling bracket B, and the second end traveling bracket are arranged sequentially at intervals along the length direction of the rebar welding positioning fixture traveling frame. The rebar welding positioning fixture traveling frame is provided with a rebar welding positioning fixture that can reciprocate along its length direction. A rebar welding positioning fixture transverse traveling drive mechanism that drives the reciprocating movement of the rebar welding positioning fixture along the rebar welding positioning fixture traveling frame is installed in the middle of the rebar welding positioning fixture traveling frame. A box girder positioning mesh welding machine is set in the middle of the rebar welding positioning fixture traveling frame. First, the rebar welding positioning fixture is moved to one end of the rebar welding positioning fixture traveling frame by the rebar welding positioning fixture lateral travel drive mechanism. Then, the rebars to be welded are placed on the rebar welding positioning fixture in sequence, and the rebars are arranged in a crisscross mesh structure. Next, driven by the rebar welding positioning fixture lateral travel drive mechanism, the rebar welding positioning fixture moves the rebars in the crisscross mesh structure, so that the positions to be welded pass through the welding station of the box girder positioning mesh welding machine in sequence. The box girder positioning mesh welding machine welds the points to be welded in sequence, and the crisscross rebars are welded into a box girder positioning mesh. After processing is completed, the rebar welding positioning fixture is reset under the action of the rebar welding positioning fixture lateral travel drive mechanism, the processed box girder positioning mesh is unloaded, and the next round of operation begins.

[0010] Furthermore, the rebar welding positioning fixture traveling frame includes side guide rails A and B that are parallel to each other and spaced apart. Side guide rails A and B are arranged sequentially and spaced apart along the length of the rebar welding positioning fixture traveling frame, including end sliding body A, middle sliding body A, middle sliding body B, and end sliding body B. End sliding body A slides along the slide rail A at the top of the first end traveling bracket, middle sliding body A slides along the slide rail B at the top of the inner traveling bracket A, middle sliding body B slides along the slide rail C at the top of the inner traveling bracket B, and end sliding body B slides along the slide rail C at the top of the inner traveling bracket B. The rebar welding positioning fixture can move along the length of the rebar welding positioning fixture traveling frame, which is the X-axis of the coordinate system. The rebar welding positioning fixture traveling frame can move along the length of the first end traveling bracket, the inner traveling bracket A, the inner traveling bracket B, and the second end traveling bracket, which is the Y-axis of the coordinate system. This facilitates loading and unloading operations. The first end traveling bracket and the entire rebar welding positioning fixture can be moved out from the welding workpiece under the box girder positioning mesh welding machine to avoid the box girder positioning mesh welding machine interfering with the loading and unloading operations. The specific operating procedure is as follows: The initial position of the rebar welding positioning fixture's traveling frame is on the side away from the box girder positioning mesh welding machine, and the rebar welding positioning fixture is at the left end of the traveling frame. At this time, the rebars to be welded are placed sequentially on the rebar welding positioning fixture, and the rebars are arranged in a crisscrossing mesh structure. Then, the rebar welding positioning fixture's traveling frame is pushed along the first end traveling bracket, and the rebar welding positioning fixture moves into the welding position below the box girder positioning mesh welding machine. The rebar welding positioning fixture drives the rebars to move in a crisscrossing mesh structure, so that the rebars to be welded are placed on the left end of the traveling frame. The welding positions pass sequentially through the welding stations of the box girder positioning mesh welding machine. The rebar welding positioning fixture moves to the right end, and the box girder positioning mesh welding machine welds the points to be welded in sequence, assembling the crisscrossing rebars into a box girder positioning mesh. After processing, the rebar welding positioning fixture moves to the left end under the action of the rebar welding positioning fixture lateral travel drive mechanism, and then pushes the rebar welding positioning fixture travel frame along the first end travel bracket. The rebar welding positioning fixture moves out of the welding station below the box girder positioning mesh welding machine, and the processed box girder positioning mesh is unloaded to begin the next cycle of operation.

[0011] Furthermore, the two ends of the end slider A are vertically fixed to the side guide rail A and the side guide rail B, respectively. The middle slider A, the middle slider B, and the end slider B all have the same structure as the end slider A. This ensures both structural strength and the desired movement.

[0012] Furthermore, the rebar welding positioning fixture includes a rectangular frame. At least two sets of track wheels A are provided on the first side of the rectangular frame, which slide in cooperation with the side guide rail A. At least two sets of track wheels B are provided on the second side of the rectangular frame, which slide in cooperation with the side guide rail B. The rectangular frame is provided with longitudinal rebar positioning ribs and transverse rebar positioning ribs in an interlaced mesh pattern. The transverse rebar positioning ribs and longitudinal rebar positioning ribs are respectively provided with rebar positioning grooves A and B. The rebars to be welded are placed in the corresponding rebar positioning grooves A and B, forming an interlaced mesh structure.

[0013] Furthermore, the transverse travel drive mechanism of the rebar welding positioning fixture includes a motor mounting frame. Both ends of the motor mounting frame are fixed to side guide rails A and B, respectively. A first reduction motor is mounted on the lower surface of the motor mounting frame, and a drive gear is mounted on the power output shaft of the first reduction motor. A rack that meshes with the drive gear is provided on the lower surface of one side of the rectangular frame, and the rack is arranged along the length of the side of the rectangular frame. Powered by the first reduction motor, the rebar welding positioning fixture moves relative to the rebar welding positioning fixture traveling frame through the forward and reverse rotation of the first reduction motor and the meshing of the gear and rack.

[0014] Furthermore, the first end travel bracket includes a support base A fixed on the ground, and the top of the support base A is an upper slide rail A that slides in cooperation with the end sliding body A. The second end travel bracket has the same structure as the first end travel bracket.

[0015] Furthermore, the inner walking bracket A includes a support base B fixed on the ground. The top of the support base B has an upper slide rail B that slides in conjunction with the intermediate sliding body A. The upper slide rail B is also equipped with a device that drives the intermediate sliding body A to reciprocate along the upper slide rail B. The inner walking bracket A has the same structure as the second end walking bracket.

[0016] Furthermore, the intermediate sliding body A includes a second reduction motor fixed to one end of the upper slide rail B. The power output shaft of the second reduction motor has a driving pulley, and the other end of the upper slide rail B has a driven pulley. An annular belt is wound between the driving pulley and the driven pulley. The annular belt is divided into an upper belt and a fixed connection with the intermediate sliding body A. By controlling the second reduction motor to rotate forward or backward, the upper belt is driven to move the intermediate sliding body A along the length direction of the upper slide rail B. This method is a conventional technology. Alternatively, a gear and rack mechanism can be used to drive the intermediate sliding body A to move along the upper slide rail B.

[0017] Furthermore, the first lifting resistance welding torch includes a lifting cylinder A mounted on the upper electrode mounting bracket. The extension end of the lifting cylinder A is equipped with a resistance welding torch head A. The lifting cylinder A drives the resistance welding torch head A to rise and fall in the vertical direction. The resistance welding torch head A has a connector A. The lifting cylinder A controls the rise and fall of the resistance welding torch head A as needed to meet the usage requirements.

[0018] Furthermore, the first lifting resistance welding gun and the second lifting resistance welding gun have the same structure and the same working method. The first lifting resistance welding gun and the second lifting resistance welding gun can work synchronously or independently.

[0019] Furthermore, the first lifting resistance welding torch includes a lifting cylinder B mounted on the lower electrode mounting bracket. The extension and retraction end of the lifting cylinder B is equipped with a resistance welding torch head B. The lifting cylinder B drives the resistance welding torch head B to move up and down in the vertical direction. The resistance welding torch head B has a connector B. The lifting cylinder B controls the lifting and lowering of the resistance welding torch head B as needed to meet the usage requirements.

[0020] Furthermore, the first and second lifting resistance welding guns have the same structure and the same working method. The first and second lifting resistance welding guns can operate synchronously or independently.

[0021] Furthermore, a connecting seat is provided on the outer side of the first side of the upper electrode mounting bracket along its length direction. One end of the flexible connecting line is installed on the connecting seat, and the other end is connected to the corresponding connecting head A. Each first lifting upper resistance welding gun corresponds to a set of flexible connecting lines. Multiple sets of flexible connecting lines can be connected to the same connecting seat. The number of first lifting upper resistance welding guns can be increased or decreased as needed. This structure makes it more convenient to add and remove the first lifting upper resistance welding gun and the flexible connecting line. The other end of the connecting seat is connected to the welding machine host through a wire.

[0022] Furthermore, the flexible connecting line has a sheet-like structure with a T-slot along the length of the connecting seat. The end of the flexible connecting line is installed on the connecting seat through a T-slot nut. This structure makes the installation and removal of the flexible connecting line more convenient.

[0023] Furthermore, the second lifting upper resistance welding gun, the first lifting lower resistance welding gun, and the second lifting lower resistance welding gun are also connected to the welding machine host in the same way.

[0024] Furthermore, the welding machine host is mounted on the base, one end of the lower electrode mounting bracket has a support column A supported on the base, one end of the upper electrode mounting bracket has a support column B on the lower electrode mounting bracket, thereby enhancing the overall structural strength.

[0025] An automated welding process for box girder positioning mesh skeletons is characterized by the following: the initial position of the rebar welding positioning fixture's traveling frame is on the side away from the box girder positioning mesh welding machine, and the rebar welding positioning fixture is located at the left end of the traveling frame. At this point, the rebars to be welded are placed sequentially on the rebar welding positioning fixture, forming a crisscrossing mesh structure. The traveling frame is then pushed along the first end traveling bracket, moving the rebar welding positioning fixture into the welding station below the box girder positioning mesh welding machine. The rebar welding positioning fixture then drives the rebars to form a crisscrossing mesh. The structure moves, allowing the welding positions to pass sequentially through the welding station of the box girder positioning mesh welding machine. The rebar welding positioning fixture moves to the right end, and the box girder positioning mesh welding machine welds the welding points sequentially, assembling the crisscrossing rebars into the box girder positioning mesh. After processing, the rebar welding positioning fixture moves to the left end under the action of the rebar welding positioning fixture lateral travel drive mechanism. Then, it pushes the rebar welding positioning fixture traveling frame along the first end traveling bracket, moving the rebar welding positioning fixture out of the welding station below the box girder positioning mesh welding machine. The processed box girder positioning mesh is then unloaded, and the next cycle of operation begins. Compared with the prior art, the present invention has the following beneficial effects: The automatic welding production line and process for box girder positioning mesh skeleton described in this invention involves setting up a box girder positioning mesh welding machine in the middle of the rebar welding positioning fixture's traveling frame. First, the rebar welding positioning fixture is moved to one end of the traveling frame via a transverse travel drive mechanism. Then, the rebars to be welded are sequentially placed on the rebar welding positioning fixture, forming a crisscrossing mesh structure. Next, driven by the transverse travel drive mechanism, the rebar welding positioning fixture moves the crisscrossing mesh structure, allowing the welding positions to sequentially pass through the welding station of the box girder positioning mesh welding machine. The box girder positioning mesh welding machine welds the points to be welded sequentially, assembling the crisscrossing rebars into a box girder positioning mesh. After processing, the rebar welding positioning fixture is reset under the action of the transverse travel drive mechanism, and the processed box girder positioning mesh is unloaded for the next cycle. This gives the entire production line an automatic feeding function, intelligent operation, and ease of use, greatly improving work efficiency.

[0026] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention are provided with rebar positioning grooves A and B on the transverse and longitudinal rebar positioning plates, respectively. The rebars to be welded are placed in the corresponding rebar positioning grooves A and B to form an interlaced mesh structure. The rebars to be welded can be placed sequentially on the rebar welding positioning fixture, and the rebars are arranged in an interlaced mesh structure to achieve rapid positioning and improve processing efficiency.

[0027] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention features a conveyor track between the upper and lower electrode mounting frames. The pre-assembled components to be welded are transported via this track to the welding station between the upper and lower electrode mounting frames. A first and second lifting upper resistance welding gun descend simultaneously, while a first and second lifting lower resistance welding gun rises simultaneously. The welding guns of the first and second lifting upper and lower resistance welding guns approach each other to weld the components in the area to be welded. Through the coordinated operation of multiple sets of these welding guns, the box girder positioning mesh is assembled and welded, enabling simultaneous welding of multiple connection points. This high-efficiency production line is suitable for applications requiring high efficiency.

[0028] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention have a set of flexible connecting lines for each first lifting resistance welding gun. Multiple sets of flexible connecting lines can be connected to the same connecting seat. The number of first lifting resistance welding guns can be increased or decreased as needed. This structure makes the addition and removal of the first lifting resistance welding gun and the flexible connecting lines more convenient. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0030] Figure 1 This is a perspective view of the present invention. Figure 2 for Figure 1 A three-dimensional view of the feeding mechanism of the welding machine; Figure 3 for Figure 1 Front view of the feeding mechanism of the welding machine; Figure 4 for Figure 1 Top view of the feeding mechanism of the welding machine; Figure 5 for Figure 1 Side view of the feeding mechanism of the welding machine.

[0031] Figure 6 for Figure 1 Three-dimensional positioning mesh welding machine for middle box girder Figure 1 ; Figure 7 for Figure 1 Three-dimensional positioning mesh welding machine for middle box girder Figure 2; Figure 8 for Figure 1 Side view of the positioning mesh welding machine for the middle box girder Figure 1 ; Figure 9 for Figure 1 Side view of the positioning mesh welding machine for the middle box girder Figure 2 ; Figure 10 Plan view of the steel reinforcement mesh for positioning the box girder.

[0032] In the diagram: 1. First end traveling bracket 1.1. Support base A 1.2. Upper slide rail A 2. Inner traveling bracket A 2.1. Support base B 2.2. Upper slide rail B 2.3. Longitudinal traveling drive mechanism of the traveling frame 3. Inner traveling bracket B 4. Second end traveling bracket 5. Rebar welding positioning fixture traveling frame 5.1. Side guide rail A 5.2. Side guide rail B 5.3. End sliding body A 5.4. Middle sliding body A 5.5. Middle sliding body B 5.6. End sliding body B 6. Rebar welding positioning fixture 6.1. Rectangular frame 6.2. Track wheel A 6.3. Transverse rebar positioning rib plate 6.4. Longitudinal rebar positioning rib plate 6.5. Rebar positioning groove A 6.6. Rebar positioning groove B 7. Rebar welding positioning fixture lateral travel drive mechanism 7.1 First geared motor 7.2 Motor mounting bracket 11 Welding machine host 12 Upper electrode mounting bracket 13 Lower electrode mounting bracket 14 First lifting upper resistance welding gun 14.1 Lifting cylinder A 14.2 Resistance welding gun head A 14.3 Connector A 15 Second lifting upper resistance welding gun 16 First lifting lower resistance welding gun 17 Second lifting lower resistance welding gun 18 Connecting seat 19 Flexible connecting line. Detailed Implementation

[0033] The present invention will now be further described with reference to the accompanying drawings: The present invention will be further illustrated by specific embodiments below, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0034] Example 1 like Figure 1-9As shown, the automatic welding production line for box girder positioning mesh includes a welding machine feeding mechanism. A box girder positioning mesh welding machine for assembly welding is installed in the middle of the welding machine feeding mechanism. The box girder positioning mesh welding machine includes a welding machine main unit 11, an upper electrode mounting frame 12 installed on the upper part of the welding machine main unit 11, and a lower electrode mounting frame 13 installed in the middle of the welding machine main unit 11. The upper electrode mounting frame 12 has a U-shaped structure, with both ends fixed to the welding machine main unit 11. The lower electrode mounting frame 13 also has a U-shaped structure, with both ends fixed to the welding machine main unit 11. The inner side of the first side of the mounting bracket 12 is provided with multiple sets of vertically arranged first lifting upper resistance welding guns 14 at intervals. The inner side of the second side of the upper electrode mounting bracket 12 is provided with multiple sets of vertically arranged second lifting upper resistance welding guns 15 at intervals. The inner side of the first side of the lower electrode mounting bracket 13 is provided with multiple sets of vertically arranged first lifting lower resistance welding guns 16 that cooperate with the first lifting upper resistance welding guns 14 at intervals. The inner side of the second side of the lower electrode mounting bracket 13 is provided with multiple sets of vertically arranged second lifting lower resistance welding guns 17 that cooperate with the second lifting upper resistance welding guns 15 at intervals.

[0035] A conveyor track is set between the upper electrode mounting frame 12 and the lower electrode mounting frame 13. The pre-assembled parts to be welded are transported to the welding station between the upper electrode mounting frame 12 and the lower electrode mounting frame 13 via the conveyor track. The first lifting upper resistance welding gun 14 and the second lifting upper resistance welding gun 15 descend simultaneously, while the first lifting lower resistance welding gun 16 and the second lifting lower resistance welding gun 17 rise simultaneously. The resistance welding guns of the first lifting upper resistance welding gun 14, the first lifting lower resistance welding gun 16, the second lifting upper resistance welding gun 15, and the second lifting lower resistance welding gun 17 approach each other to weld the parts to be welded in the area to be welded. By having multiple sets of the first lifting upper resistance welding gun 14, the second lifting upper resistance welding gun 15, the first lifting lower resistance welding gun 16, and the second lifting lower resistance welding gun 17 work together to assemble and weld the box girder positioning mesh. Multiple connection points can be welded at the same time, resulting in high work efficiency and making it suitable for places with high efficiency requirements.

[0036] The welding machine feeding mechanism includes a rebar welding positioning fixture traveling frame 5 and a support frame for supporting the rebar welding positioning fixture traveling frame 5. The support frame includes a first end traveling bracket 1, an inner traveling bracket A2, an inner traveling bracket B3, and a second end traveling bracket 4 that are parallel to each other and used to support the rebar welding positioning fixture traveling frame 5. The first end traveling bracket 1, the inner traveling bracket A2, the inner traveling bracket B3, and the second end traveling bracket 4 are arranged sequentially and at intervals along the length direction of the rebar welding positioning fixture traveling frame 5. A rebar welding positioning fixture 6 that can reciprocate along its length is provided on the rebar welding positioning fixture traveling frame 5. A rebar welding positioning fixture transverse traveling drive mechanism 7 that drives the rebar welding positioning fixture 6 to reciprocate along the rebar welding positioning fixture traveling frame 5 is installed in the middle of the rebar welding positioning fixture traveling frame 5. A box girder positioning mesh welding machine is installed in the middle of the reinforcing bar welding positioning fixture walking frame 5. First, the reinforcing bar welding positioning fixture 6 is moved to one end of the reinforcing bar welding positioning fixture walking frame 5 by the reinforcing bar welding positioning fixture lateral walking drive mechanism 7. Then, the reinforcing bars to be welded are placed on the reinforcing bar welding positioning fixture 6 in sequence, and the reinforcing bars are arranged in a crisscross mesh structure. Next, driven by the reinforcing bar welding positioning fixture lateral walking drive mechanism 7, the reinforcing bar welding positioning fixture 6 moves the reinforcing bars arranged in a crisscross mesh structure, so that the positions to be welded pass through the welding station of the box girder positioning mesh welding machine in sequence. The box girder positioning mesh welding machine welds the points to be welded in sequence, and the crisscrossing reinforcing bars are welded into a box girder positioning mesh. After processing is completed, the reinforcing bar welding positioning fixture 6 is reset under the action of the reinforcing bar welding positioning fixture lateral walking drive mechanism 7, the processed box girder positioning mesh is unloaded, and the next round of operation begins.

[0037] Preferably, the rebar welding positioning fixture traveling frame 5 includes parallel and spaced-apart side guide rails A5.1 and B5.2. Along the length of the rebar welding positioning fixture traveling frame 5, side guide rails A5.1 and B5.2 are sequentially and spaced apart by end sliding bodies A5.3, intermediate sliding bodies A5.4, intermediate sliding bodies B5.5, and end sliding bodies B5.6. End sliding body A5.3 slides along the slide rail A at the top of the first end traveling bracket 1, intermediate sliding body A5.4 slides along the slide rail B at the top of the inner traveling bracket A2, and intermediate sliding body B5.5 slides along the slide rail B at the top of the inner traveling bracket B3. The slide rail C slides, and the end sliding body B5.6 slides along the slide rail C on the top of the inner walking bracket B3. The rebar welding positioning fixture 6 can move along the length direction of the rebar welding positioning fixture walking frame 5, which is the X direction of the coordinate system. The rebar welding positioning fixture walking frame 5 can move along the length direction of the first end walking bracket 1, the inner walking bracket A2, the inner walking bracket B3 and the second end walking bracket 4, which is the Y direction of the coordinate system. This facilitates loading and unloading operations. The first end walking bracket 1 and the rebar welding positioning fixture 6 as a whole can be moved out from the welding fixture below the box girder positioning mesh welding machine to avoid the box girder positioning mesh welding machine interfering with the loading and unloading operations.

[0038] The specific operating procedure is as follows: The initial position of the rebar welding positioning fixture traveling frame 5 is on the side away from the box girder positioning mesh welding machine, while the rebar welding positioning fixture 6 is at the left end of the rebar welding positioning fixture traveling frame 5. At this time, the rebars to be welded are placed sequentially on the rebar welding positioning fixture 6, and the rebars are arranged in a crisscrossing mesh structure. Then, the rebar welding positioning fixture traveling frame 5 is pushed along the first end traveling bracket 1, and the rebar welding positioning fixture 6 moves into the welding position below the box girder positioning mesh welding machine. The rebar welding positioning fixture 6 drives the rebars to move in a crisscrossing mesh structure, thus... The welding positions pass sequentially through the welding station of the box girder positioning mesh welding machine. The rebar welding positioning fixture 6 moves to the right end, and the box girder positioning mesh welding machine welds the points to be welded in sequence, assembling the crisscrossing rebars into a box girder positioning mesh. After processing, the rebar welding positioning fixture 6 moves to the left end under the action of the rebar welding positioning fixture lateral travel drive mechanism 7, and then pushes the rebar welding positioning fixture travel frame 5 along the first end travel bracket 1. The rebar welding positioning fixture 6 moves out of the welding station below the box girder positioning mesh welding machine, unloads the processed box girder positioning mesh, and begins the next round of operation.

[0039] Preferably, the two ends of the end slider A5.3 are vertically fixed on the side guide rail A5.1 and the side guide rail B5.2 respectively. The middle slider A5.4, the middle slider B5.5, and the end slider B5.6 have the same structure as the end slider A5.3, which ensures both structural strength and movement performance.

[0040] Preferably, the rebar welding positioning fixture 6 includes a rectangular frame 6.1. At least two sets of track wheels A6.2, which slide and cooperate with side guide rails A5.1, are provided on the first side of the rectangular frame 6.1. At least two sets of track wheels B, which slide and cooperate with side guide rails B5.2, are provided on the second side of the rectangular frame 6.1. Longitudinal rebar positioning ribs 6.4 and transverse rebar positioning ribs 6.3 are arranged in an interlaced mesh pattern inside the rectangular frame 6.1. Rebar positioning grooves A6.5 and B6.6 are respectively provided on the transverse rebar positioning ribs 6.3 and the longitudinal rebar positioning ribs 6.4. The rebars to be welded are placed in the corresponding rebar positioning grooves A6.5 and B6.6, forming an interlaced mesh structure.

[0041] Preferably, the transverse travel drive mechanism 7 of the rebar welding positioning fixture includes a motor mounting frame 7.2. The two ends of the motor mounting frame 7.2 are respectively fixed on the side guide rail A5.1 and the side guide rail B5.2. A first reduction motor 7.1 is mounted on the lower surface of the motor mounting frame 7.2. A drive gear is mounted on the power output shaft of the first reduction motor 7.1. A rack that meshes with the drive gear is provided on the lower surface of one side of the rectangular frame 6.1. The rack is arranged along the length direction of the side of the rectangular frame 6.1 and is powered by the first reduction motor 7.1. Through the forward and reverse rotation of the first reduction motor 7.1, the rebar welding positioning fixture 6 moves relative to the rebar welding positioning fixture traveling frame 5 under the meshing of the gear and the rack.

[0042] Preferably, the first end travel bracket 1 includes a support base A1.1 fixed on the ground, and the top of the support base A1.1 is an upper slide rail A1.2 that slides in cooperation with the end slide body A5.3. The second end travel bracket 4 has the same structure as the first end travel bracket 1.

[0043] Preferably, the inner walking bracket A2 includes a support base B2.1 fixed on the ground. The top of the support base B2.1 has an upper slide rail B2.2 that slides in conjunction with the intermediate sliding body A5.4. The upper slide rail B2.2 is also equipped with a device that drives the intermediate sliding body A5.4 to reciprocate along the upper slide rail B2.2. The inner walking bracket A2 has the same structure as the second end walking bracket 4.

[0044] Preferably, the intermediate sliding body A5.4 includes a second reduction motor fixed to one end of the upper slide rail B2.2. The power output shaft of the second reduction motor has a driving pulley, and the other end of the upper slide rail B2.2 has a driven pulley. An annular belt is wound between the driving pulley and the driven pulley. The annular belt is divided into an upper belt and a lower belt, which is fixedly connected to the intermediate sliding body A5.4. By controlling the second reduction motor to rotate forward or backward, the upper belt is driven to move the intermediate sliding body A5.4 along the length direction of the upper slide rail B2.2. This method is a conventional technology. Alternatively, a gear and rack mechanism can be used to drive the intermediate sliding body A5.4 to move along the upper slide rail B2.2.

[0045] Preferably, the first lifting resistance welding torch 14 includes a lifting cylinder A14.1 mounted on the upper electrode mounting bracket 12. The extension end of the lifting cylinder A14.1 is equipped with a resistance welding torch head A14.2. The lifting cylinder A14.1 drives the resistance welding torch head A14.2 to move up and down in the vertical direction. The resistance welding torch head A14.2 has a connector A14.3. The lifting cylinder A14.1 controls the lifting and lowering of the resistance welding torch head A14.2 as needed to meet the usage requirements.

[0046] Preferably, the first lifting upper resistance welding gun 14 and the second lifting upper resistance welding gun 15 have the same structure and the same working mode. The first lifting upper resistance welding gun 14 and the second lifting upper resistance welding gun 15 can work synchronously or independently.

[0047] Preferably, the first lifting resistance welding torch 16 includes a lifting cylinder B mounted on the lower electrode mounting bracket 13. The extension end of the lifting cylinder B is equipped with a resistance welding torch head B. The lifting cylinder B drives the resistance welding torch head B to move up and down in the vertical direction. The resistance welding torch head B has a connector B. The lifting cylinder B controls the lifting and lowering of the resistance welding torch head B as needed to meet the usage requirements.

[0048] Preferably, the first lifting-type lower resistance welding gun 16 and the second lifting-type lower resistance welding gun 17 have the same structure and the same working mode. The first lifting-type lower resistance welding gun 16 and the second lifting-type lower resistance welding gun 17 can operate synchronously or independently.

[0049] Preferably, a connecting seat 18 is provided on the outer side of the first side of the upper electrode mounting bracket 12 along its length direction. One end of the flexible connecting line 19 is installed on the connecting seat 18, and the other end is connected to the corresponding connector A14.3. Each first lifting upper resistance welding gun 14 corresponds to a set of flexible connecting lines 19. Multiple sets of flexible connecting lines 19 can be connected to the same connecting seat 18. The number of first lifting upper resistance welding guns 14 can be increased or decreased as needed. This structure makes it more convenient to add and remove the first lifting upper resistance welding gun 14 and the flexible connecting line 19. The other end of the connecting seat 18 is connected to the welding machine host 11 through a wire.

[0050] Preferably, the flexible connecting line 19 has a sheet-like structure and a T-slot is provided along the length of the connecting seat 18. The end of the flexible connecting line 19 is installed on the connecting seat 18 through a T-slot nut. This structure makes it more convenient to install and remove the flexible connecting line 19.

[0051] Preferably, the second lifting upper resistance welding gun 15, the first lifting lower resistance welding gun 16, and the second lifting lower resistance welding gun 17 are also connected to the welding machine host 11 in the same way.

[0052] Preferably, the welding machine host 11 is mounted on the base, one end of the lower electrode mounting frame 13 has a support column A supported on the base, one end of the upper electrode mounting frame 12 has a support column B on the lower electrode mounting frame 13, thereby enhancing the overall structural strength.

[0053] Example 2 The described automatic welding production process for box girder positioning mesh skeleton involves the rebar welding positioning fixture initially positioned away from the box girder positioning mesh welding machine, with the rebar welding positioning fixture at the left end of the moving frame. The rebars to be welded are then sequentially placed on the rebar welding positioning fixture, forming a crisscrossing mesh structure. The moving frame is then pushed along the first end support, moving the rebar welding positioning fixture into the welding station below the box girder positioning mesh welding machine. The rebar welding positioning fixture then drives the rebars to form a crisscrossing mesh structure. The movement allows the welding positions to pass sequentially through the welding station of the box girder positioning mesh welding machine. The rebar welding positioning fixture moves to the right end, and the box girder positioning mesh welding machine welds the welding points sequentially, assembling the crisscrossing rebars into a box girder positioning mesh. After processing, the rebar welding positioning fixture moves to the left end under the action of the rebar welding positioning fixture lateral travel drive mechanism, and then pushes the rebar welding positioning fixture travel frame along the first end travel bracket. The rebar welding positioning fixture moves out of the welding station below the box girder positioning mesh welding machine, unloads the processed box girder positioning mesh, and begins the next cycle of operation.

[0054] The automatic welding production line and process for box girder positioning mesh skeleton described in this invention involves setting up a box girder positioning mesh welding machine in the middle of the rebar welding positioning fixture's traveling frame. First, the rebar welding positioning fixture is moved to one end of the traveling frame via a transverse travel drive mechanism. Then, the rebars to be welded are sequentially placed on the rebar welding positioning fixture, forming a crisscrossing mesh structure. Next, driven by the transverse travel drive mechanism, the rebar welding positioning fixture moves the crisscrossing mesh structure, allowing the welding positions to sequentially pass through the welding station of the box girder positioning mesh welding machine. The box girder positioning mesh welding machine welds the points to be welded sequentially, assembling the crisscrossing rebars into a box girder positioning mesh. After processing, the rebar welding positioning fixture is reset under the action of the transverse travel drive mechanism, and the processed box girder positioning mesh is unloaded for the next cycle. This gives the entire production line an automatic feeding function, intelligent operation, and ease of use, greatly improving work efficiency.

[0055] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention are provided with rebar positioning grooves A and B on the transverse and longitudinal rebar positioning plates, respectively. The rebars to be welded are placed in the corresponding rebar positioning grooves A and B to form an interlaced mesh structure. The rebars to be welded can be placed sequentially on the rebar welding positioning fixture, and the rebars are arranged in an interlaced mesh structure to achieve rapid positioning and improve processing efficiency.

[0056] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention features a conveyor track between the upper and lower electrode mounting frames. The pre-assembled components to be welded are transported via this track to the welding station between the upper and lower electrode mounting frames. A first and second lifting upper resistance welding gun descend simultaneously, while a first and second lifting lower resistance welding gun rises simultaneously. The welding guns of the first and second lifting upper and lower resistance welding guns approach each other to weld the components in the area to be welded. Through the coordinated operation of multiple sets of these welding guns, the box girder positioning mesh is assembled and welded, enabling simultaneous welding of multiple connection points. This high-efficiency production line is suitable for applications requiring high efficiency.

[0057] The automatic welding production line and process for the box girder positioning mesh skeleton described in this invention have a set of flexible connecting lines for each first lifting resistance welding gun. Multiple sets of flexible connecting lines can be connected to the same connecting seat. The number of first lifting resistance welding guns can be increased or decreased as needed. This structure makes the addition and removal of the first lifting resistance welding gun and the flexible connecting lines more convenient.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0059] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. An automatic welding production line for box girder positioning mesh skeleton, characterized in that: The system includes a welding machine feeding mechanism, in the middle of which is a box girder positioning mesh welding machine for assembly welding operations. The box girder positioning mesh welding machine includes a welding machine main unit, an upper electrode mounting frame mounted on the upper part of the welding machine main unit, and a lower electrode mounting frame mounted in the middle of the welding machine main unit. The upper electrode mounting frame has a U-shaped structure, with both ends fixed to the welding machine main unit. The lower electrode mounting frame also has a U-shaped structure, with both ends fixed to the welding machine main unit. Multiple sets of vertically aligned first lifting resistance welding guns are spaced apart on the inner side of the first side of the upper electrode mounting frame. Multiple sets of vertically aligned second lifting resistance welding guns are spaced apart on the inner side of the second side of the upper electrode mounting frame. Multiple sets of vertically aligned second lifting resistance welding guns are spaced apart on the inner side of the first side of the lower electrode mounting frame. A first lifting lower resistance welding gun is provided to cooperate with a first lifting upper resistance welding gun. Multiple sets of second lifting lower resistance welding guns, cooperating with the second lifting upper resistance welding gun, are arranged vertically at intervals on the inner side of the second side of the lower electrode mounting frame. The welding machine loading mechanism includes a rebar welding positioning fixture traveling frame and a support frame for supporting the rebar welding positioning fixture traveling frame. The support frame includes a first end traveling bracket, an inner traveling bracket A, an inner traveling bracket B, and a second end traveling bracket, which are parallel to each other and used to support the rebar welding positioning fixture traveling frame. The first end traveling bracket, inner traveling bracket A, inner traveling bracket B, and second end traveling bracket are arranged sequentially at intervals along the length direction of the rebar welding positioning fixture traveling frame. The rebar welding positioning fixture traveling frame is equipped with a rebar welding positioning fixture that can reciprocate along its length. A rebar welding positioning fixture lateral travel drive mechanism is installed in the middle of the traveling frame to drive the rebar welding positioning fixture to reciprocate along the traveling frame. The traveling frame includes parallel and spaced side guide rails A and B. Between the side guide rails A and B, along the length of the traveling frame, are sequentially spaced end sliding bodies A, intermediate sliding bodies A, intermediate sliding bodies B, and end sliding bodies B. The end sliding body A slides along the slide rail A at the top of the first end traveling bracket. The intermediate sliding body A… The inner sliding bracket A slides along the top of the slide rail B, the middle sliding body B slides along the top of the slide rail C, and the end sliding body B slides along the top of the slide rail C. The rebar welding positioning fixture can move along the length direction of the rebar welding positioning fixture walking frame, which is the X direction of the coordinate system. The rebar welding positioning fixture walking frame can move along the length direction of the first end walking bracket, the inner walking bracket A, the inner walking bracket B, and the second end walking bracket, which is the Y direction of the coordinate system. This facilitates loading and unloading operations. The first end walking bracket and the rebar welding positioning fixture as a whole can be moved out from the welding workpiece under the box girder positioning mesh welding machine to avoid the box girder positioning mesh welding machine interfering with the loading and unloading operations.

2. The automatic welding production line for the box girder positioning mesh frame according to claim 1, characterized in that, The two ends of the end slider A are respectively vertically fixed on the side guide rail A and the side guide rail B. The middle slider A, the middle slider B and the end slider B are all the same in structure as the end slider A.

3. The automatic welding production line for the box girder positioning mesh frame according to claim 1, characterized in that, The rebar welding positioning fixture includes a rectangular frame. At least two sets of track wheels A are provided on the first side of the rectangular frame, which slide in cooperation with the side guide rail A. At least two sets of track wheels B are provided on the second side of the rectangular frame, which slide in cooperation with the side guide rail B. The rectangular frame is provided with longitudinal rebar positioning plates and transverse rebar positioning plates in an interlaced mesh pattern. The transverse rebar positioning plates and longitudinal rebar positioning plates are respectively provided with rebar positioning grooves A and B. The rebars to be welded are placed in the corresponding rebar positioning grooves A and B, forming an interlaced mesh structure.

4. The automatic welding production line for the box girder positioning mesh frame according to claim 3, characterized in that, The transverse travel drive mechanism of the rebar welding positioning fixture includes a motor mounting frame. The two ends of the motor mounting frame are respectively fixed on side guide rail A and side guide rail B. A first reduction motor is mounted on the lower surface of the motor mounting frame. A drive gear is mounted on the power output shaft of the first reduction motor. A rack that meshes with the drive gear is provided on the lower surface of one side of the rectangular frame. The rack is arranged along the length direction of the side of the rectangular frame and is powered by the first reduction motor. Through the forward and reverse rotation of the first reduction motor, the rebar welding positioning fixture moves relative to the rebar welding positioning fixture traveling frame under the meshing of the gear and rack.

5. The automatic welding production line for the box girder positioning mesh frame according to claim 4, characterized in that, The initial position of the rebar welding positioning fixture's traveling frame is on the side away from the box girder positioning mesh welding machine, with the rebar welding positioning fixture at the left end of the traveling frame. At this point, the rebars to be welded are placed sequentially on the rebar welding positioning fixture, forming a crisscrossing mesh structure. The traveling frame is then pushed along the first end traveling bracket, moving the rebar welding positioning fixture into the welding position below the box girder positioning mesh welding machine. The rebar welding positioning fixture then moves the crisscrossing mesh structure of the rebars, allowing the welding position to be adjusted. The steel bar welding positioning fixture moves to the right end of the welding station of the box girder positioning mesh welding machine, passing through the welding station in sequence. The machine then welds the points to be welded, assembling the crisscrossing steel bars into a box girder positioning mesh. After processing, the steel bar welding positioning fixture moves to the left end under the action of the transverse travel drive mechanism. It then pushes the traveling frame of the steel bar welding positioning fixture along the first end travel bracket, moving the steel bar welding positioning fixture out of the welding station below the box girder positioning mesh welding machine. The processed box girder positioning mesh is then unloaded, and the next cycle of operation begins.

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