Bicycle frame welding production line

Abstract

The utility model relates to a bicycle frame welding production line. Comprising a first welding station, a second welding station, a third welding station and a correcting station which are sequentially arranged, wherein the first welding station is used for completing welding of a front beam pipe assembly; the second welding station is used for completing welding of a whole frame and a front welding bead of the frame; the third welding station is used for completing welding of a back welding bead of the frame; the first welding station, the second welding station, the third welding station and the correcting station are sequentially arranged, welding of the whole bicycle frame can be completed only through four procedures, namely, the three welding procedures and the one correcting procedure, the machining procedures can be simplified, the length of a production line can be reduced, then the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycle frame welding, in particular to a bicycle frame welding production line. Background Art

[0002] Electric bicycles are widely used by consumers as a daily means of transportation. The frame of an electric bicycle is the supporting and fixing component of the entire vehicle, and is also a key component that connects and supports other components. It is constructed by welding multiple pipes and sheet metal parts. The welding of electric bicycle frames is a key step in the manufacturing process. Existing frame welding production lines typically have six steps, with robots completing the welding process in five steps and one step of straightening. However, the numerous welding steps required for existing electric bicycle frames require four horizontal rotary welding positioners and ten sets of welding tooling, resulting in a long production line and the need for six operators to weld the frames. This not only increases labor costs but also reduces production efficiency.

[0003] Therefore, designing an electric bicycle frame welding production line, simplifying the processing procedures, reducing the length of the production line, and thus reducing production costs and improving production efficiency are technical problems that technical personnel in this field urgently need to solve. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a bicycle frame welding production line, which simplifies the processing procedures, reduces the length of the production line, and further reduces production costs and improves production efficiency.

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

[0006] A bicycle frame welding production line, comprising:

[0007] The first welding station for completing the welding of the front beam tube assembly, the second welding station for completing the welding of the overall frame and the front weld of the frame, the third welding station for completing the welding of the back weld of the frame, and the correction station for correcting the position to be corrected are set up in sequence.

[0008] Preferably, the first welding station includes a first welding robot, a first operating table arranged on one side of the first welding robot, a second operating table arranged on the other side of the first welding robot, and a first manual operation station for performing alternating manual operation.

[0009] Preferably, the second welding station comprises:

[0010] a second welding robot and a third welding robot arranged opposite to each other;

[0011] a third operating table disposed between the second welding robot and the third welding robot and capable of rotating;

[0012] as well as,

[0013] The second manual operation station and the third manual operation station are located at one end of the third operating table away from the second welding robot and the third welding robot, and are relatively arranged on both sides of the third operating table. The third operating table includes a first end operating table and a second end operating table.

[0014] Preferably, the third welding station includes:

[0015] a fourth welding robot and a fifth welding robot arranged opposite to each other;

[0016] a fourth operating table disposed between the fourth welding robot and the fifth welding robot and capable of rotating;

[0017] as well as,

[0018] A fourth manual operation station is located at one end of the fourth operating table away from the fourth welding robot and the fifth welding robot, and the fourth operating table includes a third end operating table and a fourth end operating table.

[0019] Preferably, the correction station includes an integrated correction tooling device and a fifth manual operation station for manual operation.

[0020] Preferably, a first conveying device for conveying workpieces is provided between the first welding station and the second welding station, a second conveying device for conveying workpieces is provided between the second welding station and the third welding station, and a third conveying device for conveying workpieces is provided between the third welding station and the correcting station.

[0021] Preferably, the second manual operation station is arranged between the first conveying device and the third operating platform, and the third manual operation station is arranged between the third operating platform and the second conveying device.

[0022] Preferably, a fourth conveying device for conveying workpieces is arranged between the first conveying device and the third operating table, a fifth conveying device for conveying workpieces is arranged between the third operating table and the second conveying device, a sixth conveying device for conveying workpieces is arranged between the second conveying device and the fourth operating table, and a seventh conveying device for conveying workpieces is arranged between the fourth operating table and the third conveying device.

[0023] Preferably, a first driving motor for driving the third operating platform to rotate is provided at the bottom of the third operating platform, and an output shaft of the first driving motor is fixedly connected to the third operating platform;

[0024] A second driving motor for driving the fourth operating platform to rotate is provided at the bottom of the fourth operating platform, and an output shaft of the second driving motor is fixedly connected to the fourth operating platform.

[0025] Preferably, the first conveying device, the second conveying device, the third conveying device, the fourth conveying device, the fifth conveying device, the sixth conveying device, and the seventh conveying device are conveyor belt conveyors or roller conveyors.

[0026] Compared with the prior art, the utility model has achieved the following technical effects:

[0027] By setting up the first welding station, the second welding station, the third welding station and the correction station in sequence, the welding of the entire bicycle frame can be completed through only four steps, namely three welding steps and one correction step. This can simplify the processing steps, reduce the length of the production line, and thus reduce production costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Attachment Figure 1 This is a schematic diagram of the overall structure of the electric bicycle frame welding production line with three welding stations disclosed in an embodiment of the utility model;

[0030] Among them, 1. the first welding robot; 2. the second welding robot; 3. the third welding robot; 4. the fourth welding robot; 5. the fifth welding robot; 6. the first operating table; 7. the second operating table; 8. the third operating table; 9. the fourth operating table; 10. the first manual operation station; 11. the second manual operation station; 12. the third manual operation station; 13. the fourth manual operation station; 14. the fifth manual operation station; 15. the first conveying equipment; 16. the second conveying equipment; 17. the third conveying equipment; 18. the integrated correction tooling equipment. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The purpose of the utility model is to provide a bicycle frame welding production line, which simplifies the processing procedures, reduces the length of the production line, and further reduces the production cost and improves the production efficiency.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] refer to Figure 1 The bicycle frame welding production line disclosed in the embodiment of the present invention comprises at least a first welding station for completing the welding of the front beam assembly, a second welding station for completing the welding of the overall frame and the front weld of the frame, a third welding station for completing the welding of the back weld of the frame, and a correction station for correcting the position to be corrected. The first welding station, the second welding station, the third welding station and the correction station are arranged in sequence, that is, the process of the bicycle frame is to first complete the welding of the front beam assembly by the first welding station, then perform the welding of the overall frame and the front weld of the frame by the second welding station, complete the welding of the back weld of the frame by the third welding station, and finally correct the position to be corrected by the correction station;

[0035] It should be noted that the front side of the bicycle frame mentioned in the embodiments of the present invention refers to the side of the bicycle frame facing upwards when the bicycle is in a normal riding state, and the back side of the bicycle frame refers to the side of the bicycle frame facing downwards when the bicycle is in a normal riding state;

[0036] The production line in this embodiment is preferably used for welding electric bicycle frames, and can also be used for welding electric tricycles, human-powered tricycles and human-powered bicycle frames.

[0037] In this embodiment, when the bicycle frame needs to be welded, the first welding station, the second welding station, the third welding station and the correction station are set in sequence. The welding of the entire bicycle frame can be completed through only four steps, namely three welding steps and one correction step. This can simplify the processing steps, reduce the length of the production line, and thus reduce production costs and improve production efficiency.

[0038] It should be noted that the position to be corrected refers to the installation of the rear fork assembly and the correction of the rear fork assembly and the head tube. The position to be corrected can also be adjusted according to the supplier's requirements to perform corrections in other positions.

[0039] As an embodiment, the first welding station includes a first welding robot 1, a first operating table 6 arranged on one side of the first welding robot 1, a second operating table 7 arranged on the other side of the first welding robot 1, and a first manual operation station 10 for alternating manual operation. In the first manual operation station 10, an operator is equipped. The operator transports the front beam tube assembly to be welded to the first operating table 6 or the second operating table 7. When the first welding robot 1 welds the front beam tube assembly on the first operating table 6, the operator moves the front beam tube assembly to be welded on the second operating table 7. When the first welding robot 1 completes the welding of the front beam tube assembly on the first operating table 6, the first welding robot 1 turns to the second operating table 7 to weld the clamped front beam tube assembly to be welded. At this time, the operator transports the welded front beam tube assembly on the first operating table 6 to the second welding station, and re-clamps the front beam tube assembly to be welded on the first welding operating table 6. The operator alternately repeats the above operations between the first operating table 6 and the second operating table 7. By one operator alternating between the two operating tables, work efficiency can be improved.

[0040] It should be noted that, in this embodiment, the front beam tube assembly includes a component welded together including a head tube, a front beam tube, a head tube reinforcement plate and other components. When clamping, the head tube, the front beam tube, the head tube reinforcement plate and other components need to be clamped in predetermined positions to facilitate welding by the first welding robot 1.

[0041] refer to Figure 1In one embodiment, the second welding station includes: a second welding robot 2 and a third welding robot 3 arranged opposite to each other, a rotatable third operating table 8 is arranged between the second welding robot 2 and the third welding robot 3, a second manual operating station 11 and a third manual operating station 12 are located at one end of the third operating table 8 away from the second welding robot 2 and the third welding robot 3, the second manual operating station 11 and the third manual operating station 12 are arranged opposite to each other, the third operating table 8 includes a first end operating table and a second end operating table, because the third operating table 8 is rotatable, the first end operating table and the second The end operating table is alternately located between the second welding robot 2, the third welding robot 3 and the second manual operation station 11 and the third manual operation station 12. When the front beam tube assembly welded by the first welding station is transported to the second welding station, the operator on the second manual operation station 11 and the operator on the third manual operation station 12 jointly place the welded front beam tube assembly and the rear triangle assembly, pedal tube, bottom tube, etc. that need to form the whole vehicle frame together with the front beam tube assembly on the first end operating table, and clamp the above components. After clamping is completed, the third operating table 8 is used to clamp the components. Rotate 180 degrees and move the first end operating table to between the second welding robot 2 and the third welding robot 3. The second welding robot 2 and the third welding robot 3 will jointly complete the welding of the whole frame and the front weld of the frame. At this time, the second end operating table will be moved to between the second manual operation station 11 and the third manual operation station 12. The operators of the second manual operation station 11 and the third manual operation station 12 will jointly transport the welded whole frame and the front weld of the frame to the third welding station, and move the welded front beam tube assembly and the rear triangle that needs to be formed with the front beam tube assembly to form the whole vehicle frame. The components, foot tubes, bottom tubes, etc. are placed on the second end operating table, and the above operations are repeated. By setting the second welding robot 2 and the third welding robot 3 at the second welding station, the simultaneous welding of the overall frame and the front weld of the frame can be achieved, thereby simplifying the welding process and improving work efficiency. In addition, a second manual operation station 11 and a third manual operation station 12 are set, so that two operators can jointly complete the joint clamping and loading of multiple components, which can further improve work efficiency and avoid the problem of only setting one operator and not being able to complete the transportation and clamping of multiple components at the same time, thereby reducing work efficiency.

[0042] refer to Figure 1As an embodiment, the third welding station includes: a fourth welding robot 4 and a fifth welding robot 5 arranged opposite to each other, a rotatable fourth operating table 9 is provided between the fourth welding robot 4 and the fifth welding robot 5, and a fourth manual operation station 13 is located at one end of the fourth operating table 9 away from the fourth welding robot 4 and the fifth welding robot 5. The fourth operating table 9 includes a third end operating table and a fourth end operating table. Because the fourth operating table 9 is rotatable, the third end operating table and the fourth end operating table are alternately located between the fourth welding robot 4, the fifth welding robot 5 and the fourth manual operation station 13. When the integral frame and the front weld of the frame completed by the second welding station are transported to the third welding station, the operator on the fourth manual operation station 13 places the welded integral frame and the front weld of the frame on the third end operating table, and the integral frame is turned over and clamped. After clamping is completed, the third end operating table is rotated 180 degrees by the fourth operating table 9. The platform is transferred to between the fourth welding robot 4 and the fifth welding robot 5, and the fourth welding robot 4 and the fifth welding robot 5 jointly complete the welding of the back weld of the frame. At this time, the fourth end operating platform is transferred to the fourth manual operation station 13, and the operator of the fourth manual operation station 13 transports the welded back weld of the frame to the fourth welding station, and places the welded integral frame and the front weld of the frame on the fourth end operating platform, and repeats the above operation. By setting the fourth welding robot 4 and the fifth welding robot 5 at the third welding station, the welding of the back weld of the frame can be realized, and the repair welding operation can be performed for the position that needs repair welding, thereby simplifying the welding process and improving work efficiency. Since the third welding station has already been used for the welding of the integral frame, there is no need to combine and weld multiple parts. Therefore, only the fourth manual operation station 13 is set here to realize the clamping and loading operations, and there is no need to set up multiple operators, which can reduce production costs while ensuring work efficiency.

[0043] refer to Figure 1 As an embodiment, the correction station includes an integrated correction fixture 18 and a fifth manual operation station 14 for manual operation. The operator at the fifth manual operation station 14 places the frame welded by the third welding station on the working platform of the integrated correction fixture 18, and assembles the rear fork assembly to the frame body to form the frame. The rear fork assembly is aligned with the center line of the head tube through the correction fixture to complete the correction operation.

[0044] It should be noted that the welding robot in this embodiment is a multi-degree-of-freedom welding robot in the prior art, with a rotating structure provided at the bottom to drive the entire welding robot to rotate, and its welding manipulator can rotate and swing at multiple angles.

[0045] refer to Figure 1As a preferred method, a first conveying device 15 for conveying workpieces is provided between the first welding station and the second welding station, a second conveying device 16 for conveying workpieces is provided between the second welding station and the third welding station, and a third conveying device 17 for conveying workpieces is provided between the third welding station and the correction station. By providing the first conveying device 15, the second conveying device 16 and the third conveying device 17, the parts that need to be transported to adjacent stations can be transferred through the conveying equipment, without the need for manual handling by the operator, which can greatly improve work efficiency and reduce the work intensity of the operator.

[0046] refer to Figure 1 As a preferred embodiment, a fourth conveying device for conveying workpieces is provided between the first conveying device 15 and the third operating table 8, a fifth conveying device for conveying workpieces is provided between the third operating table 8 and the second conveying device 16, a sixth conveying device for conveying workpieces is provided between the second conveying device 16 and the fourth operating table 9, and a seventh conveying device for conveying workpieces is provided between the fourth operating table 9 and the third conveying device 17. The workpiece transported by the first conveying device 15 can be directly sent to the third operating table 8 through the fourth conveying device, without the need for operator transportation. The operator only needs to wait for the transfer of the workpiece at his corresponding workstation. The corresponding workpiece welded on the third operating table 8 can be directly sent to the fourth operating table 9 through the fifth conveying device, the second conveying device 16 and the sixth conveying device. The workpiece welded on the fourth operating table 9 can be directly sent to the third conveying device 17 through the seventh conveying device, without the need for manual transfer, which can further improve work efficiency and reduce the work intensity of the operator.

[0047] It should be noted that each operating station is equipped with a start / stop button to control the start / stop of each conveying device. The operator can start and stop the conveying device by observing the position of the workpiece on each conveying device, making the operation more convenient.

[0048] As a preferred embodiment, each conveying device is provided with a displacement sensor for sensing the transfer position of the workpiece. When the sensor senses that the workpiece is located at the head end of the conveying device, the conveying device is started. When the sensor senses that the workpiece is located at the end of the conveying device, the conveying device is stopped. In this way, there is no need to manually start and stop the conveying device, which greatly improves work efficiency.

[0049] refer to Figure 1 , a first driving motor for driving the third operating platform 8 to rotate is provided at the bottom of the third operating platform 8, and the output shaft of the first driving motor is fixedly connected to the third operating platform 8;

[0050] It should be noted that the first drive motor can directly drive the third operating platform 8 to rotate, or the output shaft of the first drive motor can be connected to the reducer, the first drive motor can be decelerated and then the rotation of the third operating platform 8 can be completed. The output shaft of the first drive motor can also be fixedly connected to the first pulley, and a second pulley can be provided at the bottom of the third operating platform 8. The first pulley and the second pulley are transmitted by a belt. When the first drive motor rotates, the first pulley drives the second pulley to rotate, thereby driving the third operating platform 8 to rotate. Alternatively, the output shaft of the first drive motor can be fixedly connected to the first gear, and a second gear can be provided at the bottom of the third operating platform 8. The first gear and the second gear are engaged with each other. When the first motor rotates, the first gear drives the second gear to rotate, thereby driving the third operating platform 8 to rotate.

[0051] A second drive motor for driving the fourth operating table 9 to rotate is provided at the bottom of the fourth operating table 9, and an output shaft of the second drive motor is fixedly connected to the fourth operating table 9;

[0052] It should be noted that the second drive motor can directly drive the fourth operating platform 9 to rotate, or the output shaft of the second drive motor can be connected to the reducer, the second drive motor can be decelerated and then the rotation of the fourth operating platform 9 can be completed. The output shaft of the second drive motor can also be fixedly connected to the third pulley, and a fourth pulley is provided at the bottom of the fourth operating platform 9. The third pulley and the fourth pulley are transmitted by a belt. When the second drive motor rotates, the third pulley drives the fourth pulley to rotate, thereby driving the fourth operating platform 9 to rotate, or the output shaft of the second drive motor can be fixedly connected to the third gear, and a fourth gear is provided at the bottom of the fourth operating platform 9. The third gear and the fourth gear are engaged with each other. When the second drive motor rotates, the third gear drives the fourth gear to rotate, thereby driving the fourth operating platform 9 to rotate.

[0053] refer to Figure 1 As a preferred embodiment, the first conveying device 15, the second conveying device 16, the third conveying device 17, the fourth conveying device, the fifth conveying device, the sixth conveying device, and the seventh conveying device are conveyor belt conveyors or roller conveyors;

[0054] It should be noted that when each conveying device is a conveyor belt, a main transmission shaft is provided at one end of the conveyor belt, and the main transmission shaft is connected to the output shaft of the motor through a coupling. A driven shaft is provided at the other end of the conveyor belt. The motor drives the main transmission shaft to rotate, and then drives the driven shaft to rotate to realize the transmission of the conveyor belt. A tensioning device can also be provided between the main transmission shaft and the driven shaft to prevent the conveyor belt from loosening and affecting the transmission efficiency of the workpiece.

[0055] When each conveying device is a roller transmission, three or more rollers are installed on a supporting frame through supporting bearings, and a driving device for driving the rollers to rotate is provided at one end of the supporting frame. The preferred driving device is a driving motor, and the output shaft of the driving motor is fixedly provided with a large pulley or a large sprocket, and the ends of the three or more rollers away from the supporting bearings are provided with a small pulley or a small sprocket fixedly connected to the roller. The large pulley transmits power to the small pulley through the conveyor belt. When the driving motor drives the large pulley to rotate, the rotation of the large pulley simultaneously drives the small pulleys arranged on the three or more rollers to rotate, thereby driving all the rollers to rotate synchronously to complete the transmission of parts, and the large sprocket transmits power to the small sprocket through the transmission chain. When the driving motor drives the large sprocket to rotate, the rotation of the large sprocket simultaneously drives the small sprockets arranged on the three or more rollers to rotate, thereby driving all the rollers to rotate synchronously to complete the transmission of parts;

[0056] As a preferred embodiment, a pressing device for pressing adjacent rollers is provided between three or more rollers.

[0057] The welding process of the bicycle frame in the utility model is as follows:

[0058] The first welding process: To complete the welding of the front beam tube assembly, a first manual operation station 10, a first welding robot 1, and two operating tables are set up, namely the first operating table 6 and the second operating table 7. When the first welding robot 1 is working at one of the operating tables, the staff at the first manual operation station 10 completes the loading and clamping of parts at the other operating table, and works alternately between the two operating tables.

[0059] Second welding process: complete the welding of the overall frame and the front weld of the frame, set up a second manual operation station 11 and a third manual operation station 12, a second welding robot 2 and a third welding robot 3 and a rotatable third operating table 8, that is, set up two operators, two welding robots, and a horizontal rotary operating table, and the third operating table 8 is symmetrically provided with a first end operating table and a second end operating table;

[0060] When the front beam tube assembly welded by the first welding station is transported to the second welding station, the operator on the second manual operation station 11 and the operator on the third manual operation station 12 jointly place the welded front beam tube assembly and the rear triangle assembly, pedal tube, bottom tube, etc. that need to form the whole vehicle frame together with the front beam tube assembly on the first end operating table, and clamp the above components. After clamping is completed, the first end operating table is turned to between the second welding robot 2 and the third welding robot 3 by rotating the third operating table 8 by 180 degrees, and the second welding robot 10 is connected to the second welding robot 2 and the third welding robot 3. Robot 2 and the third welding robot 3 jointly complete the welding of the overall frame and the front weld of the frame. At this time, the second end operating table is transferred to between the second manual operating station 11 and the third manual operating station 12. The operators between the second manual operating station 11 and the third manual operating station 12 jointly transport the welded overall frame and the front weld of the frame to the third welding station, and place the welded front beam tube assembly and the rear triangle assembly, foot tube, bottom tube, etc. that need to form the whole vehicle frame together with the front beam tube assembly on the second end operating table, and repeat the above operations.

[0061] The third welding process completes the welding of the back weld of the frame. A fourth welding robot 4 and a fifth welding robot 5 are set up, and a fourth manual operation station 13 and a rotatable fourth operating table 9 are set up, that is, one operator is equipped with two welding robots and a horizontal rotary operating table;

[0062] When the integral frame and the front weld of the frame welded by the second welding station are transported to the third welding station, the operator on the fourth manual operation station 13 places the welded integral frame and the front weld of the frame on the third end operating table, and the integral frame is turned over and clamped. After clamping is completed, the third end operating table is rotated 180° by the fourth operating table 9 to be transferred between the fourth welding robot 4 and the fifth welding robot 5, and the fourth welding robot 4 and the fifth welding robot 5 jointly complete the welding of the back weld of the frame. At this time, the fourth end operating table is transferred to the fourth manual operation station 13, and the operator between the fourth manual operation station 13 transports the welded back weld of the frame to the fourth welding station, and places the welded integral frame and the front weld of the frame on the fourth end operating table, and repeats the above operation. By setting the fourth welding robot 4 and the fifth welding robot 5 at the third welding station, the welding of the back weld of the frame can be realized, and the repair welding operation can be performed on the position that needs repair welding.

[0063] Correction process: After the installation of the rear fork assembly and the correction of the rear fork assembly and the centerline of the head tube are completed, a fifth manual operation station 14 and an integrated correction tooling device 18 are set up, that is, one operator and one operating table are configured;

[0064] The operator at the fifth manual operation station 14 places the frame welded at the third welding station onto the working platform of the integrated correction fixture 18, and assembles the rear fork assembly to the frame body to form the frame. The correction fixture is used to align the rear fork assembly with the center line of the head tube to complete the correction operation.

[0065] Adaptive changes based on actual needs are all within the scope of protection of this utility model.

[0066] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be considered as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A bicycle frame welding production line, characterized in that: It includes a first welding station for completing the welding of the front beam tube assembly, a second welding station for completing the welding of the overall frame and the front weld of the frame, a third welding station for completing the welding of the back weld of the frame, and a correction station for correcting the position to be corrected.

2. The bicycle frame welding production line according to claim 1, characterized in that: The first welding station comprises a first welding robot (1), a first operating table (6) arranged on one side of the first welding robot (1), a second operating table (7) arranged on the other side of the first welding robot (1), and a first manual operation station (10) for performing alternating manual operations.

3. The bicycle frame welding production line according to claim 1, characterized in that: The second welding station includes: A second welding robot (2) and a third welding robot (3) arranged opposite to each other; a third operating table (8) disposed between the second welding robot (2) and the third welding robot (3) and capable of rotating; as well as, A second manual operation station (11) and a third manual operation station (12) are located at one end of the third operating table (8) away from the second welding robot (2) and the third welding robot (3), and are relatively arranged on both sides of the third operating table (8), and the third operating table (8) includes a first end operating table and a second end operating table.

4. The bicycle frame welding production line according to claim 3, characterized in that: The third welding station includes: a fourth welding robot (4) and a fifth welding robot (5) arranged opposite to each other; a fourth operating table (9) disposed between the fourth welding robot (4) and the fifth welding robot (5) and capable of rotating; as well as, A fourth manual operation station (13) is located at one end of the fourth operating table (9) away from the fourth welding robot (4) and the fifth welding robot (5), and the fourth operating table (9) includes a third end operating table and a fourth end operating table.

5. The bicycle frame welding production line according to claim 1, characterized in that: The correction station includes an integrated correction tooling device (18) and a fifth manual operation station (14) for manual operation.

6. The bicycle frame welding production line according to claim 4, characterized in that: A first conveying device (15) for conveying workpieces is provided between the first welding station and the second welding station, a second conveying device (16) for conveying workpieces is provided between the second welding station and the third welding station, and a third conveying device (17) for conveying workpieces is provided between the third welding station and the correcting station.

7. The bicycle frame welding production line according to claim 6, characterized in that: The second manual operation station (11) is arranged between the first conveying device (15) and the third operating platform (8), and the third manual operation station (12) is arranged between the third operating platform (8) and the second conveying device (16).

8. The bicycle frame welding production line according to claim 6, characterized in that: A fourth conveying device for conveying workpieces is provided between the first conveying device (15) and the third operating table (8), a fifth conveying device for conveying workpieces is provided between the third operating table (8) and the second conveying device (16), a sixth conveying device for conveying workpieces is provided between the second conveying device (16) and the fourth operating table (9), and a seventh conveying device for conveying workpieces is provided between the fourth operating table (9) and the third conveying device (17).

9. The bicycle frame welding production line according to claim 4, characterized in that: A first drive motor for driving the third operating table (8) to rotate is provided at the bottom of the third operating table (8), and an output shaft of the first drive motor is fixedly connected to the third operating table (8); A second drive motor for driving the fourth operating platform (9) to rotate is provided at the bottom of the fourth operating platform (9), and an output shaft of the second drive motor is fixedly connected to the fourth operating platform (9).

10. The bicycle frame welding production line according to claim 8, characterized in that: The first conveying device (15), the second conveying device (16), the third conveying device (17), the fourth conveying device, the fifth conveying device, the sixth conveying device, and the seventh conveying device are conveyor belt conveyors or roller conveyors.

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