An on-line robot automated welding system

Abstract

The present application discloses an automatic welding system for a robot following the line, comprising a main conveying roller and a plurality of welding robots, the welding robots are arranged on both sides of the main conveying roller, and are characterized in that a plurality of annular following-the-line tracks are respectively arranged on both sides of the main conveying roller, the working part of the following-the-line tracks is parallel to the main conveying roller, a plurality of pallets are arranged on the following-the-line tracks for transportation, the welding robots are fixed to the pallets, and the pallets are also provided with a power supply mechanism, a control mechanism, a welding machine host and a following-the-line fixing mechanism, wherein: the power supply mechanism is used to supply power to the control mechanism, the welding machine host and the following-the-line fixing mechanism; the control mechanism is used to control the movement of the welding robot; the following-the-line fixing mechanism is used to fix the position of the pallet and the workpiece to be welded in the working part. The present system enables the welding robot to follow the moving workpiece to be welded for following-the-line welding, without stopping the workpiece to be welded, thereby not affecting the workpiece production rhythm, and greatly improving the production efficiency.

Description

Technical Field

[0001] The present application belongs to the field of industrial robots, and in particular to an on-line robot automated welding system. Background Art

[0002] Robotic automated welding technology has been widely used in fields such as machinery manufacturing, automobile manufacturing, electronic equipment, aerospace, medical equipment manufacturing, and the energy industry. The welding gun is usually driven by a robotic arm. When the workpiece to be welded reaches the designated position, welding is performed along the specified path according to a preset program.

[0003] Existing welding robots are all fixed to the welding station. After the welded parts arrive at the station, the positioning mechanism needs to fix the frame to be welded to prevent the position from moving during the welding process. Since each station needs to weld at different positions, the production cycle is determined by the station with the longest welding time. Other stations need to wait until the welding of this station is completed before they can continue to work. This seriously affects production efficiency.

[0004] Therefore, there is an urgent need for a new robot automated welding system that can solve the above problems. Summary of the invention

[0005] In order to address the deficiencies of the prior art, the present application provides an on-line robot automated welding system, which enables the welding robot to follow the moving workpiece to be welded and perform on-line welding without the need for the workpiece to be welded to stop, thereby not affecting the workpiece production rhythm and greatly improving production efficiency.

[0006] The technical effects to be achieved by this application are achieved through the following solutions:

[0007] According to the first aspect of the present application, there is provided an on-line robot automated welding system, comprising a main conveying roller and a plurality of welding robots, wherein the welding robots are arranged on both sides of the main conveying roller, and a plurality of annular on-line tracks are respectively arranged on both sides of the main conveying roller, and the working part of the on-line track is parallel to the main conveying roller, and a plurality of pallets are arranged on the on-line track for transportation, and the welding robot is fixed to the pallet, and a power supply mechanism, a control mechanism, a welding machine host and an on-line fixing mechanism are also arranged on the pallet, wherein:

[0008] The power supply mechanism is used to supply power to the control mechanism, the welding machine host and the inline fixing mechanism;

[0009] The control mechanism is used to control the movement of the welding robot;

[0010] The in-line fixing mechanism is used to fix the positions of the tray and the workpiece to be welded in the working part.

[0011] Preferably, the roller of the working part is coaxially connected to the main conveying roller, and the following track also includes a return track arranged parallel to the working part. The return track is connected to the end of the working part through a transfer track, and the return track and the transfer track are both powered.

[0012] Preferably, the working part and the transfer track, as well as the return track and the transfer track are connected via a lifting track, on which a plurality of transfer wheels are arranged, the transfer wheels are located between the rollers and arranged perpendicularly to the rollers; a transfer groove matching the transfer wheel is provided at the bottom of the pallet.

[0013] Preferably, the lifting rail includes a lifting frame, a fixed frame and a lifting cylinder, the transfer wheel is rotatably connected to the lifting frame, the transfer wheels are connected to a drive motor on the lifting frame through a chain, and the lifting cylinder is fixed to the fixed frame to drive the lifting frame to rise or fall, so as to drive the transfer wheel to expose the roller upward, or retract the roller downward.

[0014] Preferably, the roller of the working part is a power supply roller, three first electrodes are arranged on the power supply roller, second electrodes corresponding to the first electrodes are arranged at the bottom of the tray, and several power supply brushes corresponding to the first electrodes are arranged under the power supply roller; the second electrode is connected to the power supply mechanism.

[0015] Preferably, the first electrode is annular and is nested and fixed to the outside of the power supply roller, and an insulating layer is provided between the first electrode and the power supply roller.

[0016] Preferably, a positioning groove is provided at the periphery of the first electrode, and a strip-shaped guide strip matching the positioning groove is provided at the bottom of the second electrode; and the shape of the brush head of the power supply brush is consistent with the shape of the positioning groove.

[0017] Preferably, the power supply brush comprises the brush head, a compression spring and a brush cover, the brush cover is fixed to the frame of the main conveying roller, the compression spring is located in the brush cover and always applies an upward thrust to the brush head.

[0018] Preferably, the in-line fixing mechanism includes a clamping arm and a clamping cylinder, and meshing gears are fixed on the rotating shaft of the clamping arm, and the meshing gears are meshed with each other. The clamping cylinder drives one of the clamping arms to open or clamp; two clamping grooves are provided at the end of the clamping arm, and the clamping grooves match the positioning columns on the tooling plate of the workpiece to be welded.

[0019] Preferably, the power supply mechanism comprises a voltage stabilizing and transforming module and a battery, wherein the voltage stabilizing and transforming module is used to charge the battery and supply power to the welding machine after being connected to a power source; and the battery is used to drive the control mechanism and the robot.

[0020] According to an embodiment of the present application, the following-line robot automated welding system can enable the welding robot to follow the moving workpiece to be welded, thereby completing the welding operation without stopping the workpiece, which helps to improve the welding cycle of the workpiece and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the existing technical solutions, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a structural schematic diagram of an on-line robot automated welding system in one embodiment of the present application;

[0023] Figure 2 for Figure 1 The structural diagram at A in the middle;

[0024] Figure 3 for Figure 2 A schematic diagram of the side structure of the mid-lift track;

[0025] Figure 4 for Figure 2 Schematic diagram of the structure of the power supply roller table;

[0026] Figure 5 for Figure 4 Schematic diagram of the structure of the power brush;

[0027] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure of the middle tray;

[0028] Figure 7 for Figure 6 A schematic diagram of the structure of the middle tray viewed from above;

[0029] Figure 8 for Figure 1 A schematic diagram of the structure of the middle tray from a top view;

[0030] Fig. 9 It is a schematic diagram of the top view structure of the tooling plate;

[0031] Fig.10 for Figure 1Circuit structure block diagram of the in-line robot automated welding system. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] like Figure 1 As shown, the line-following robot automated welding system in one embodiment of the present application includes a main conveying roller 10 and a plurality of welding robots 30, the welding robots 30 are arranged on both sides of the main conveying roller 10, and a plurality of annular line-following tracks 20 are respectively arranged on both sides of the main conveying roller 10, the working part 110 of the line-following track 20 is parallel to the main conveying roller 10, and a plurality of pallets 200 are transported and arranged on the line-following track 20, the welding robot 30 is fixed to the pallet 200, and the pallet 200 is also provided with a power supply mechanism 230, a control mechanism 240, a welding machine 40 host and a line fixing mechanism, wherein:

[0034] The power supply mechanism 230 is used to supply power to the control mechanism 240, the welding machine 40 host and the line fixing mechanism, and moves with the robot and the welding machine 40 to directly supply power, thereby avoiding the power supply cable from being damaged by dragging or being entangled in circles due to the circular movement;

[0035] The control mechanism 240 is used to control the movement of the welding robot 30 so that the control mechanism 240 moves along with the robot to avoid the control cable being dragged along with the movement of the robot, thereby preventing the control cable from being damaged by friction or becoming tangled due to the circular motion;

[0036] The in-line fixing mechanism is used to fix the position of the tray 200 and the workpiece to be welded in the working part 110, so as to ensure the welding accuracy and avoid the problem of weld deviation caused by deviation in moving speed or positioning position.

[0037] Through this embodiment and this scheme, the workpiece to be welded is placed on the tooling plate 300 of the main conveyor roller 10, and is driven by the main conveyor roller 10 to move forward at a preset speed. When it reaches the working part 110, the welding robot 30 moves synchronously with the workpiece to be welded in the working part 110, thereby completing the welding operation; after welding is completed, it moves to the front end of the working part 110 through the circular linear track 20 to continue waiting for welding, so there is no need to wait for the welding workpiece to stop and position before performing the welding operation, thereby speeding up production efficiency.

[0038] Working parts 110 are provided on both sides of the main conveying roller 10, and the two sides of the same workpiece are welded separately. The two robots work together, which helps to reduce the size of the robots, so that the lighter robots can run smoothly on the following track 20, reduce the load of the following track 20, and improve reliability.

[0039] In this embodiment, the roller of the working part 110 is coaxially connected to the main conveying roller 10, and the following track 20 also includes a return track 120 arranged parallel to the working part 110. The return track 120 is connected to the end of the working part 110 through a transfer track 130, and both the return track 120 and the transfer track 130 are powered.

[0040] The working part 110 is coaxially connected to the main conveying roller 10, and its conveying speed is consistent with the speed of the main conveying roller 10, which ensures the synchronization of the movement of the welding robot 30 and the workpiece to be welded; and the line fixing mechanism only has a positioning function, and will not bear the drag force during movement, thereby reducing its load.

[0041] After the working part 110 moves to the rear end, the pallet 200 is moved to the return track 120 by the transfer track 130, transported forward to the end by the return track 120, and then moved to the working part 110 by the transfer track 130 to continue the welding operation.

[0042] In order to ensure the synchronization between the pallet 200 and the tooling plate 300, a number of position sensors are provided on the main conveying roller 10 and the tracking track 20. When the workpiece to be welded reaches the position, the welding robot 30 is synchronously released to enter the working part 110 to ensure synchronization.

[0043] A plurality of pallets 200 are arranged on the line track 20, and a robot for the same or different work is arranged on each pallet 200. If the incoming materials are dense, a plurality of robots are used to weld simultaneously to ensure the work rhythm; if the incoming materials are not dense, different robots can be used to weld different parts, so that the current workstation can complete the welding work of multiple workstations at the same time, thereby improving the welding efficiency and reducing the length of the production line.

[0044] A grinding robot can also be set on the pallet 200. Multiple pallets 200 are fixed to the same tooling plate 300 using an in-line fixing mechanism. When the welding robot 30 completes welding, the grinding robot grinds the weld to further improve production efficiency. Moreover, grinding directly after welding is completed helps to improve the grinding effect.

[0045] like Figure 2As shown, in one embodiment of the present application, the working part 110 and the transfer track 130 are connected as well as the return track 120 and the transfer track 130 are connected via a lifting track 140, and a plurality of transfer wheels 141 are provided on the lifting track 140. The transfer wheels 141 are located between the rollers and arranged perpendicularly to the rollers; a transfer groove 201 matching the transfer wheels 141 is provided at the bottom of the pallet 200.

[0046] In order to facilitate the transfer of the pallet 200, the height of the transfer track 130 is greater than that of the working part 110 and the return track 120, and the working part 110 is consistent in height with the main conveying roller 10; the lifting track 140 can lift the pallet 200 and transport it to the transfer track 130. When it reaches the return track 120 or the working part 110, it is lowered again to allow the pallet 200 to be placed on the working part 110 or the transfer track 130 to complete the transfer.

[0047] After the pallet 200 reaches the lifting rail 140 , the lifting rail 140 can lift the pallet 200 to prevent it from moving prematurely. When the tooling plate 300 reaches the specified position, the lifting rail 140 descends to allow the pallet 200 to enter the working part 110 and complete the synchronous movement with the tooling plate 300 .

[0048] The transfer wheel 141 has a small width and can extend from between the rollers of the working part 110 or the return track 120. In order to improve the reliability of the drive, a transfer groove 201 matching the transfer wheel 141 is provided at the bottom of the tray 200, and trumpet mouths are provided on the front and rear sides of the transfer groove 201 to facilitate the entry of the transfer wheel 141; in order to increase the friction force, a rack can be provided in the transfer groove 201, and the transfer wheel 141 can be changed into a gear to avoid slipping.

[0049] like Figure 3 As shown, the lifting rail 140 in one embodiment of the present application includes a lifting frame 142, a fixed frame 143 and a lifting cylinder 144. The transfer wheel 141 is rotatably connected to the lifting frame 142. The transfer wheel 141 is connected to a drive motor 145 on the lifting frame 142 through a chain. The lifting cylinder 144 is fixed to the fixed frame 143 and is used to drive the lifting frame 142 to rise or fall, so as to drive the transfer wheel 141 to expose the roller upward, or retract the roller downward.

[0050] The fixed frame 143 is fixed to the frame of the linear track 20, and a plurality of light rods 146 are arranged at the bottom of the lifting frame 142. The light rods 146 are slidably connected with the fixed frame 143 to ensure stability during movement. The driving motor 145 moves with the lifting frame 142 to ensure the driving reliability of the transfer wheel 141. The driving motor 145 is connected to the driving wheel by a synchronous belt, a belt or a chain.

[0051] like Figures 4 to 7As shown, in one embodiment of the present application, the roller of the working part 110 is a power supply roller 111, three first electrodes 150 are arranged on the power supply roller 111, and second electrodes 210 corresponding to the first electrodes 150 are arranged at the bottom of the tray 200, and several power supply brushes 160 corresponding to the first electrodes 150 are arranged below the power supply roller 111; the second electrodes 210 are connected to the power supply mechanism 230.

[0052] After the power supply brush 160 is connected to the three-phase power supply, when the tray 200 moves in the working part 110, the second electrode 210 can be pressed against the first electrode 150, so that the electric energy in the power supply brush 160 is electrically connected with the second electrode 210 through the first electrode 150, and the power supply roller 111 directly powers the equipment on the tray 200 without the need for additional connecting cables, thereby ensuring the flexibility of the tray 200 when moving and avoiding various dangers caused by cable dragging, such as cable entanglement during circular movement, cable friction damage during cable dragging, and the inability to move the tray 200 when the cable is stuck.

[0053] In this embodiment, the first electrode 150 is annular and nested and fixed outside the power supply roller 111, and an insulating layer 152 is provided between the first electrode 150 and the power supply roller 111. The insulating layer 152 is made of, for example, ceramic material, rubber material, etc., which can prevent the first electrode 150 and the metal part of the power supply roller from conducting and generating arcs.

[0054] In the embodiment, a positioning groove 151 is provided on the periphery of the first electrode 150, and a strip-shaped guide bar 211 matching the positioning groove 151 is provided on the bottom of the second electrode 210; the shape of the brush head 161 of the power supply brush 160 is consistent with the shape of the positioning groove 151. The guide bar 211 can be inserted into the positioning groove 151 to complete the positioning, which can not only ensure the reliability of the connection between the second electrode 210 and the first electrode 150, so that the bottom of the guide bar 211 is in close contact with the bottom of the positioning groove 151; but also can guide the tray 200, ensuring that it can move in a straight line and avoid the deviation of the weld caused by shaking left and right.

[0055] In order to improve the guiding and positioning function, the positioning groove 151 is set to a structure that is wide at the top and narrow at the bottom, so that the guide bar 211 can smoothly enter and fit tightly with the bottom to complete the conductive connection. The shape of the second electrode 210 matches the first electrode 150, which can improve the guiding function and prevent the guide bar 211 from shaking left and right in the positioning groove 151.

[0056] An insulating protective layer 212 is also provided between the second electrode 210 and the tray 200 , and a connecting slot is provided on the top of the second electrode 210 , allowing connection by plugging and unplugging, or by bolting.

[0057] In the embodiment, the power supply brush 160 includes a brush head 161, a pressing spring 163 and a brush cover 162. The brush cover 162 is fixed to the frame of the main conveying roller 10. The pressing spring 163 is located in the brush cover 162 and always applies an upward thrust to the brush head 161. A cable 164 is connected to the brush head 161. The pressing spring 163 presses the brush head 161 into the positioning groove 151 to improve reliability. The brush cover 162 guides the movement of the brush head 161.

[0058] The brush head 161 is made of graphite or copper, etc., has good electrical conductivity and wear resistance, and can reduce friction with the positioning groove 151 .

[0059] like Figure 8 and Fig. 9 As shown, the in-line fixing mechanism in one embodiment of the present application includes a clamping arm 221 and a clamping cylinder 223. Meshing gears 222 are fixed on the rotating shaft of the clamping arm 221. The meshing gears 222 are meshed with each other. The clamping cylinder 223 drives a clamping arm 221 to open or clamp. Two clamping grooves 224 are provided at the end of the clamping arm 221, and the clamping grooves 224 match the positioning columns 310 on the tooling plate 300 of the workpiece to be welded.

[0060] The meshing gear 222 can make the two clamping arms 221 move synchronously and with the same movement amplitude, which can ensure that after the clamping arms 221 clamp the positioning columns 310 of the tooling plate 300, they can always be in the same position, so that the welding quality of each workpiece is consistent.

[0061] The clamping groove 224 is a trumpet-shaped one. If the position of the tray 200 deviates, the positioning column 310 can slide to the bottom of the clamping groove 224 during the clamping process, and the tray 200 or the tooling plate 300 can be pulled to a suitable position to ensure that the positions of the tray 200 and the tooling plate 300 are fixed. The clamping grooves 224 of the two clamping arms 221 are arranged in an overlapping manner up and down, so as to clamp the positioning column 310.

[0062] Two positioning posts 310 and two clamping grooves 224 are provided and arranged on the left and right sides, which can improve the positioning accuracy and avoid the angle deviation between the tray 200 and the tooling plate 300.

[0063] A plurality of pairs of positioning columns 310 are provided on the tooling plate 300, which can allow different welding robots 30 at different welding positions to be connected thereto, thereby improving the scope of application; and can allow multiple robots to be connected to one tooling plate 300 at the same time, so that different welding, grinding and other operations can be completed at the same workstation, thereby further improving the scope of application.

[0064] like Fig.10As shown, the power supply mechanism 230 in one embodiment of the present application includes a voltage stabilizing and transforming module 231 and a battery 232. The voltage stabilizing and transforming module 231 is used to charge the battery 232 and supply power to the welding machine 40 after connecting to a power source; the battery 232 is used to drive the control mechanism 240 and the robot.

[0065] The battery 232 can store a certain amount of electricity, so that the welding robot 30 is still in a powered state in the transfer track 130 and the return track 120, ensuring the reliability of program operation and avoiding the system restart due to power failure, which not only wastes time but also causes the problem of program loss.

[0066] The voltage stabilizing and transforming module 231 can stabilize and transform the three-phase electricity to supply power and charge the battery 232 , thereby ensuring the power in the battery 232 , which is a lithium iron phosphate battery 232 .

[0067] An inverter module is provided in the voltage stabilizing and transforming module 231, which is used to provide AC power to the welding machine 40, the robot and other modules requiring AC power through the battery 232. It is ensured that there will be no power failure when the working part 110 is not in progress, the parameters will not be lost, and the waiting time when restarting is avoided.

[0068] When the system is in use, the position of the tooling plate 300 on the main conveyor roller 10 is detected in real time, and the pallet 200 is located on the lifting track 140 and waiting. When the tooling plate 300 reaches the specified position, the lifting track 140 descends to allow the pallet 200 to reach the working part 110, and moves synchronously with the tooling plate 300. The robot drives the welding gun of the welding machine 40 to perform synchronous welding on the workpiece to be welded. After welding is completed, the pallet 200 reaches the next lifting track 140, and the lifting track 140 lifts the pallet 200 and transports it to the transfer track 130, and then transports it to the return track 120 to wait for the next workpiece to arrive.

[0069] According to an embodiment of the present application, the following-line robot automated welding system can enable the welding robot to follow the moving workpiece to be welded, thereby completing the welding operation without stopping the workpiece, which helps to improve the welding cycle of the workpiece and improve production efficiency.

[0070] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0073] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0074] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0075] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-line robot automated welding system, comprising a main conveying roller and a plurality of welding robots, wherein the welding robots are arranged on both sides of the main conveying roller, characterized in that: A plurality of annular line-following tracks are respectively arranged on both sides of the main conveying roller, the working part of the line-following tracks is parallel to the main conveying roller, a plurality of pallets are transported and arranged on the line-following tracks, the welding robot is fixed on the pallets, and a power supply mechanism, a control mechanism, a welding machine host and a line-following fixing mechanism are also arranged on the pallets, wherein: The power supply mechanism is used to supply power to the control mechanism, the welding machine host and the inline fixing mechanism; The control mechanism is used to control the movement of the welding robot; The in-line fixing mechanism is used to fix the position of the tray and the workpiece to be welded in the working part; The roller of the working part is a power supply roller, on which three first electrodes are arranged, a second electrode corresponding to the first electrode is arranged at the bottom of the tray, and a plurality of power supply brushes corresponding to the first electrode are arranged below the power supply roller; the second electrode is connected to the power supply mechanism.

2. The on-line robot automated welding system according to claim 1, characterized in that: The roller of the working part is coaxially connected to the main conveying roller, and the line track also includes a return track arranged parallel to the working part. The return track is connected to the end of the working part through a transfer track, and the return track and the transfer track are both powered.

3. The on-line robot automated welding system according to claim 2, characterized in that: The working part and the transfer track are connected as well as the return track and the transfer track via a lifting track, on which a plurality of transfer wheels are arranged, the transfer wheels are located between the rollers and arranged perpendicularly to the rollers; a transfer groove matching the transfer wheels is arranged at the bottom of the pallet.

4. The on-line robot automated welding system according to claim 3, characterized in that: The lifting track includes a lifting frame, a fixed frame and a lifting cylinder. The transfer wheel is rotatably connected to the lifting frame. The transfer wheels are connected to a driving motor on the lifting frame through a chain. The lifting cylinder is fixed to the fixed frame to drive the lifting frame to rise or fall, so as to drive the transfer wheel to expose the roller upward or retract the roller downward.

5. The on-line robot automated welding system according to claim 1, characterized in that: The first electrode is annular and is nested and fixed outside the power supply roller. An insulating layer is provided between the first electrode and the power supply roller.

6. The on-line robot automated welding system according to claim 5, characterized in that: A positioning groove is arranged at the periphery of the first electrode, and a strip-shaped guide strip matching the positioning groove is arranged at the bottom of the second electrode; the shape of the brush head of the power supply brush is consistent with the shape of the positioning groove.

7. The on-line robot automated welding system according to claim 6, characterized in that: The power supply brush comprises the brush head, a pressing spring and a brush cover. The brush cover is fixed to the frame of the main conveying roller. The pressing spring is located in the brush cover and always applies an upward thrust to the brush head.

8. The on-line robot automated welding system according to claim 1, characterized in that: The in-line fixing mechanism includes a clamping arm and a clamping cylinder. Meshing gears are fixed on the rotating shaft of the clamping arm, and the meshing gears are meshed with each other. The clamping cylinder drives one of the clamping arms to open or clamp. Two clamping grooves are provided at the end of the clamping arm, and the clamping grooves match the positioning columns on the tooling plate of the workpiece to be welded.

9. The on-line robot automated welding system according to claim 1, characterized in that: The power supply mechanism includes a voltage stabilizing and transforming module and a battery. The voltage stabilizing and transforming module is used to charge the battery and supply power to the welding machine after being connected to a power source; the battery is used to drive the control mechanism and the robot.

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