Equipment overturning workbench and equipment welding method

Abstract

The invention relates to the technical field of machining, in particular to an equipment overturning workbench and an equipment welding method. The overturning workbench comprises the first overturning frame and the second overturning frame, and through mutual cooperation of the first overturning frame and the second overturning frame, the to-be-welded equipment can be overturned by 180 degrees and transferred to the second welding station from the first welding station, so that overturning welding of the two faces of the equipment is achieved; and the buffer mechanism is arranged in the process, the working load of the driving mechanism can be effectively reduced through the buffer mechanism, the impact force during overturning can be reduced, and the device has positive significance in reducing the energy consumption of the device, guaranteeing the service life of the device and reducing the maintenance and replacement cost. On one hand, overturning welding of equipment can be achieved, on the other hand, the overturning process is more stable and smoother, the influence of equipment vibration on the welding quality can be effectively relieved, and use in actual production is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and in particular to an equipment flipping workbench and an equipment welding method. Background Art

[0002] In the process of industrial machining, it is often necessary to machine and manufacture heavy equipment. Among them, welding is a relatively common machining method. When welding the equipment into shape by welding, generally, the pre-forming method is first adopted, and then further welding and forming are carried out.

[0003] During the welding process, since both sides of the equipment need to be welded, the equipment needs to be flipped during the process. Due to the large weight of the equipment, a flipping machine is usually used for flipping. During the initial and near-end stages of flipping, due to the angle, the driving equipment is subject to a large load, and it is easy to be damaged and worn, which also brings inconvenience. At the same time, since the equipment is pre-welded into shape, it will be subject to a large impact force during the flipping process, which will affect the welding quality of the equipment and bring inconvenience to practical applications.

[0004] Therefore, the present invention proposes an equipment flipping workbench and an equipment welding method. Through the cooperation of the first flipping frame and the second flipping frame, the welding of the equipment is realized, and through the buffer mechanism, the load of the driving equipment and the impact force during flipping are effectively reduced, ensuring the stable use of the equipment and the welding quality. Summary of the Invention

[0005] The purpose of the present invention is to provide an equipment flipping workbench and an equipment welding method to solve the problems that the existing flipping equipment has a large working load on the driving equipment during flipping, a large impact force during the flipping process, affecting the stable use of the equipment and the welding quality.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: An equipment flipping workbench includes a first flipping mechanism and a second flipping mechanism; The first flipping mechanism and the second flipping mechanism cooperate to flip the equipment to be welded by 180°; the second flipping mechanism is movably arranged to transfer the flipped equipment to be welded from the first welding station to the second welding station; Flipping frames are provided in both the first flipping mechanism and the second flipping mechanism. The flipping frame includes two perpendicular flipping arms. The flipping frame rotates around the intersection of its two flipping arms. A driving connection part is provided in the direction away from the intersection. The driving power unit drives the driving connection part and drives the flipping frame to rotate; The flipping arms in the first flipping mechanism and the second flipping mechanism respectively include a pair of cooperating bar-tooth-shaped flipping arms. When the first flipping mechanism and the second flipping mechanism cooperate, the two bar-tooth-shaped flipping arms mesh with each other. Buffer mechanisms are also provided in both the first flipping mechanism and the second flipping mechanism. The buffer mechanisms are arranged between the back sides of the two flipping arms. The buffer mechanisms include springs. During each flipping process of the flipping frame, the springs go through three states: compression, restoration, and stretching. At the beginning of flipping, they provide a positive thrust to assist the rotation of the flipping frame, reducing the working load of the driving power unit. At the end of flipping, they provide a reverse thrust to inhibit the rotation of the flipping frame, buffering the flipping frame and reducing the impact force during flipping.

[0007] Furthermore, the second flipping mechanism includes a mounting plate. The flipping frame, buffer mechanism, and driving power unit in the second flipping mechanism are all located above the mounting plate. The mounting plate is slidably arranged on the slide rail, and the driving unit drives the mounting plate to slide. When the mounting plate moves to the first limit position, the bar-tooth-shaped flipping arm of the flipping frame in the second flipping mechanism cooperates with the bar-tooth-shaped flipping arm of the flipping frame in the first flipping mechanism. When the mounting plate moves to the second limit position, the flipping frame in the second flipping mechanism cooperates with the welding robot at the second welding station.

[0008] Furthermore, the buffer mechanism includes a first buffer mechanism. A fixed arc-shaped channel is provided in the first buffer mechanism. A first arc-shaped connecting rod is inserted into the arc-shaped channel. The two ends of the first arc-shaped connecting rod are respectively hinged to the two flipping arms of the flipping frame. The first arc-shaped connecting rod is concentric with the arc-shaped channel and the rotation center of the flipping frame. A first connecting part is fixedly arranged in the arc-shaped channel. A second connecting part and a third connecting part are respectively arranged on the first arc-shaped connecting rod on both sides of the first connecting part. A first spring is arranged between the first connecting part and the second connecting part, and the two ends of the first spring are respectively fixedly connected to the first connecting part and the second connecting part. A second spring is arranged between the first connecting part and the third connecting part, and the two ends of the second spring are respectively fixedly connected to the first connecting part and the third connecting part.

[0009] Furthermore, for the first spring and the second spring, when one is in the compressed state, the other is in the stretched state, and when one is in the free state, the other is also in the free state.

[0010] Further, the buffer mechanism includes a second buffer mechanism. A moving arc-shaped channel is provided in the second buffer mechanism. A second arc-shaped connecting rod and a third arc-shaped connecting rod are inserted in the arc-shaped channel. A third spring is fixedly connected between the second arc-shaped connecting rod and the third arc-shaped connecting rod. The third spring is entirely located in the arc-shaped channel during the flipping process of the flipping frame. The other ends of the second arc-shaped connecting rod and the third arc-shaped connecting rod are respectively hinged to two flipping arms of the flipping frame. The second arc-shaped connecting rod, the third arc-shaped connecting rod, and the arc-shaped channel are concentrically arranged and eccentrically arranged with the rotation center of the flipping frame. One of the second arc-shaped connecting rod and the third arc-shaped connecting rod is fixedly arranged at the hinged part with the flipping arm, and the other is slidably arranged at the hinged part with the flipping arm.

[0011] Further, when the hinged part of the second arc-shaped connecting rod or the third arc-shaped connecting rod with the flipping arm is slidably arranged with the flipping arm, a slide rail is provided on the corresponding flipping arm, and a slider is provided on the slide rail. The slider is fixedly connected to the hinged part.

[0012] Further, when the flipping frame starts to flip, the torque applied by the third spring to the flipping frame in the rotation direction is greater than the torque in the reverse rotation direction; when the flipping is about to end, the torque applied by the third spring to the flipping frame in the rotation direction is less than the torque in the reverse rotation direction.

[0013] The equipment welding method of the equipment flipping workbench includes the following steps: The position where the first flipping frame starts to flip clockwise is recorded as the first position. After flipping 90° from the first position, the position where it starts to flip counterclockwise is recorded as the second position; the position where the second flipping frame starts to flip counterclockwise is recorded as the first position. After flipping 90° from the first position, the position where it starts to flip clockwise is recorded as the second position; S1. Place the equipment to be welded on the first flipping frame at the first position, and weld one side of the equipment by the welding robot at this station; S2. After one side of the equipment is welded, the first flipping frame flips. The second flipping frame flips from the first position to the second position at the welding station on the other side of the equipment and moves to cooperate with the first flipping frame; S3. The second flipping frame flips clockwise. After flipping to the first position, it drives the equipment back to the welding station on the other side of the equipment and welds the other side of the equipment by the welding robot at this station; the first flipping frame flips. After flipping to the first position, the flipping is completed; S4. Place the equipment that needs to be welded again on the first flipping frame, and transfer the equipment welded on the second flipping frame; S5. Repeat S1 - S4 to complete the cyclic welding of the equipment.

[0014] Further, in S2 - S3, during the cooperation process of the first flipping frame and the second flipping frame, the angle by which the first flipping frame first flips from the first position is greater than or equal to 80° and less than 90°; the second flipping frame first flips 90° from the first position to the second position. After cooperating with the first flipping frame, the first flipping frame continues to flip until the second position; then, the second flipping frame flips 90° to the first position.

[0015] Advantages of the present invention: 1. The present invention adopts the first flipping frame and the second flipping frame, which can flip the device to be welded by 180°, so as to realize the welding of both sides of the device and complete the entire welding process; 2. The present invention can realize the assistance and buffering of the flipping frame during the flipping process of the flipping frame, effectively drive the working load of the device, reduce energy consumption, and effectively avoid the impact force during flipping, which has a positive effect on ensuring the service life of the device and ensuring the welding quality. Description of the drawings

[0016] Figure 1 is a top - view schematic diagram of the flipping workbench of the present invention; Figure 2 is a front - view sectional schematic diagram of the flipping workbench of the present invention; Figure 3 is a schematic diagram of the internal structure of the flipping workbench of the present invention; Figure 4 is a schematic diagram of the state of the first buffer mechanism following the flipping frame during flipping (first state); Figure 5 is a schematic diagram of the state of the first buffer mechanism following the flipping frame during flipping (intermediate state); Figure 6 is a schematic diagram of the state of the first buffer mechanism following the flipping frame during flipping (second state); Figure 7 is a schematic diagram of the state of the second buffer mechanism following the flipping frame during flipping (first state); Figure 8 is a schematic diagram of the state of the second buffer mechanism following the flipping frame during flipping (second state); Figure 9 is a schematic diagram of the structure of the second slider and the second slide rail in the second buffer mechanism of the present invention.

[0017] Names corresponding to each mark in the figure: 1. Pit; 2. First flipping mechanism; 21. First hydraulic cylinder; 22. First mounting seat; 23. First support seat; 24. First flipping frame; 241. First flipping frame body; 242. First hinged support part; 243. First drive connection part; 3. Second flipping mechanism; 31. Second hydraulic cylinder; 32. Second mounting seat; 33. Second support seat; 34. Second flipping frame; 341. Second flipping frame body; 342. Second hinged support part; 343. Second drive connection part; 35. Mounting plate; 351. First slider; 352. Threaded connection part; 36. First slide rail; 37. Drive motor; 371. Lead screw; 4. First buffer mechanism; 41. Fixed seat; 411. Arc-shaped channel; 412. First connection part; 42. First arc-shaped connecting rod; 421. Second connection part; 422. Third connection part; 423. First spring; 424. Second spring; 425. First hinge part; 426. Second hinge part; 5. Second buffer mechanism; 51. Arc-shaped sleeve; 52. Second arc-shaped connecting rod; 521. Third hinge part; 53. Third arc-shaped connecting rod; 531. Fourth hinge part; 54. Third spring; 55. Second slide rail; 56. Second slider. Detailed implementation mode

[0018] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Embodiment 1 As Figures 1-6 shown, in this embodiment, the flipping workbench is installed in the pit 1. A first flipping mechanism 2 and a second flipping mechanism 3 are installed in the pit 1. The first flipping mechanism 2 and the second flipping mechanism 3 cooperate to perform flipping welding of the equipment.

[0020] The first flipping mechanism 2 includes a first support seat 23 and a first flipping frame 24. The first flipping frame 24 includes a first flipping frame body 241, a first hinged support part 242 and a first drive connection part 243. The first hinged support part 242 cooperates with the first support seat 23 so that the first flipping frame body 241 is received on the first support seat 23. Wear-resistant blocks are provided between the first flipping frame 24 and the first support seat 23. The first drive connection part 243 is hinged to the telescopic rod of the first hydraulic cylinder 21 to drive the first flipping frame 24 to rotate. The end of the cylinder body of the first hydraulic cylinder 21 is hinged to the first mounting seat 22. A first buffer mechanism 4 is provided below the first flipping frame 24.

[0021] The second flipping mechanism 3 includes a second support base 33 and a second flipping frame 34. The second flipping frame 34 includes a second flipping frame body 341, a second hinged support portion 342 and a second driving connection portion 343. The second hinged support portion 342 cooperates with the second support base 33, so that the second flipping frame body 341 is received on the second support base 33. A second wear-resistant block is provided between the second flipping frame 34 and the second support base 33. The second driving connection portion 343 is hinged to the telescopic rod of the second hydraulic cylinder 31 for driving the second flipping frame 34 to rotate. The end of the cylinder body of the second hydraulic cylinder 31 is hinged to the second mounting seat 32. A first buffer mechanism 4 is provided below the second flipping frame 34.

[0022] The second support base 33 and the second hydraulic cylinder 31 are provided on the mounting plate 35. A first slider 351 and a first slide rail 36 are provided below the mounting plate 35. The first slide rail 36 cooperates with the first slider 351. A threaded connection portion 352 is further provided below the mounting plate 35. The driving motor 37 is in transmission connection with the lead screw 371, and the lead screw 371 is in threaded connection with the threaded connection portion 352.

[0023] Both the first flipping frame body 241 and the second flipping frame body 341 are in an "L" shape, including two flipping arms. One side of the flipping arms that cooperate with each other is in a shape of mutually cooperating strip teeth. The mounting plate 35 and the first hydraulic cylinder 21 do not interfere with each other in space, and the first buffer mechanism 4 in the first flipping frame 24 and the second flipping frame 34 does not interfere with each other in space.

[0024] The first buffer mechanism 4 in both the first flipping frame 24 and the second flipping frame 34 includes a fixed seat 41. The width of the fixed seat 41 is less than or equal to the width of the above-mentioned strip teeth, so that the first buffer mechanism 4 in the first flipping frame 24 and the second flipping frame 34 does not interfere with each other in space. An arc-shaped channel 411 is provided in the fixed seat 41. A first connection portion 412 is fixedly provided in the arc-shaped channel 411. A first arc-shaped connecting rod 42 is provided through the first connection portion 412. First hinge portions 425 and second hinge portions 426 are respectively provided at both ends of the first arc-shaped connecting rod 42. The first hinge portions 425 and the second hinge portions 426 are respectively connected to the back sides of the two flipping arms of the first flipping frame body 241. A second connection portion 421 is provided on the first arc-shaped connecting rod 42 on one side of the first connection portion 412, and a third connection portion 422 is provided on the first arc-shaped connecting rod 42 on the other side of the first connection portion 412. A first spring 423 is provided between the first connection portion 412 and the second connection portion 421. Both ends of the first spring 423 are fixedly connected to the first connection portion 412 and the second connection portion 421 respectively. A second spring 424 is provided between the first connection portion 412 and the third connection portion 422. Both ends of the second spring 424 are fixedly connected to the first connection portion 412 and the third connection portion 422 respectively.

[0025] In this embodiment, when the first turning frame 24 rotates from the first state through the intermediate state to the second state, in the first state, the right second spring 424 is compressed. The compressed second spring 424 exerts an obliquely upward force on the third connecting portion 422. At this time, the left first spring 423 is stretched, and the stretched first spring 423 exerts an obliquely downward force on the second connecting portion 421. When driven by the first hydraulic cylinder 21, the thrust of the second spring 424 and the tensile force of the first spring 423 both contribute to the rotation of the first turning frame 24, thereby helping to reduce the load on the first hydraulic cylinder 21. When rotating to the intermediate state, such as 45 °C, at this time, both the first spring 423 and the second spring 424 are in the free elongation state, that is, no additional thrust or tensile force is generated. When continuing to rotate, the first spring 423 is in the compressed state, while the second spring 424 is in the stretched state. At this time, the thrust of the first spring 423 will delay the flipping of the first turning frame 24, and the tensile force of the second spring 424 will also hinder the flipping of the turning frame. This buffers the flipping of the first turning frame 24. On the one hand, the flipping is more stable and safe. On the other hand, it also helps to reduce the impact force between the first turning frame 24 and the first support seat 23, can slow down the wear of the wear-resistant block, helps to extend the service life of the equipment, and reduces the maintenance and replacement costs.

[0026] When the first turning frame 24 rotates from the second state to the first state, the process is opposite to the above and will not be elaborated here.

[0027] Embodiment 2 As shown in Figure 1 , Figures 7-9, in this embodiment, only the first buffer mechanism 4 is replaced with the second buffer mechanism 5, and the others are the same as those in Embodiment 1 and will not be elaborated here. The second buffer mechanism 5 is located in the pit 1 and does not interfere with the pit 1 and / or the mounting plate 35 in space. The second buffer mechanism 5 in the first turning frame 24 and the second turning frame 34 does not interfere with each other in space.

[0028] In this embodiment, the second buffer mechanism 5 includes an arc-shaped sleeve 51. A second arc-shaped connecting rod 52 and a third arc-shaped connecting rod 53 are arranged in the arc-shaped sleeve 51. One end of the second arc-shaped connecting rod 52 is connected to a third hinge portion 521, and the third hinge portion 521 is connected to the back side of one turning arm of the first turning frame 24; one end of the third arc-shaped connecting rod 53 is connected to a fourth hinge portion 531, and the fourth hinge portion 531 is connected to the back side of the other turning arm of the first turning frame 24; first limiting rings are arranged at the ends of the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 that cooperate with the arc-shaped sleeve 51, and second limiting rings are arranged at both ends of the arc-shaped sleeve 51. The first limiting rings cooperate with the second limiting rings to prevent the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 from separating from the arc-shaped sleeve 51; a third spring 54 is arranged between the two ends of the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 that are close to each other, and both ends of the third spring 54 are fixedly connected to the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 respectively.

[0029] Another difference between this embodiment and Embodiment 1 is that in Embodiment 1, the first arc-shaped connecting rod 42 is concentrically arranged with the rotation center of the first turning frame 24, while in this embodiment, the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 are not concentrically arranged with the rotation center of the first turning frame 24.

[0030] In this embodiment, one of the third hinge portion 521 and the fourth hinge portion 531 connected to the first turning frame 24 is fixedly connected to the turning arm of the first turning frame 24, and the other is movably connected to the turning arm of the first turning frame 24; for example, a second slide rail 55 is arranged on the longer turning arm of the first turning frame 24, a second slider 56 is arranged on the second slide rail 55, and the second slider 56 is connected to the third hinge portion 521. In this embodiment, during the full-process turning of the first turning frame 24, the second slider 56 and the second slider 56 do not separate from each other.

[0031] In this embodiment, when the first turning frame 24 rotates from the first state to the second state, the third spring 54 is in a stretched state during the process. At this time, the third spring 54 gives a pulling force to both turning arms at the same time. As shown in the figure, when the centers of the second arc-shaped connecting rod 52 and the third arc-shaped connecting rod 53 are located on the left side of the horizontal direction of the turning center of the turning frame, the torque connected to the second arc-shaped connecting rod 52 is greater than the torque connected to the third arc-shaped connecting rod 53, which helps to reduce the load of the first hydraulic cylinder 21; during the rotation process, as the second slider 56 moves, while the force arm gradually increases, the third spring 54 gradually changes to a compressed state, so as to be able to provide a greater torque, and thus play a buffering role; and during the process from the second state to the first state, it is the opposite of the above process and will not be elaborated.

[0032] The principle of the present invention is as follows: During the use of the present invention, the device to be welded is transferred to the first turning frame 24. After one side of the device is welded by the welding robot at the welding station on the first turning frame 24, it is turned over. During the turning process, it is first turned to nearly 90° ( Figure 1 The state after turning is shown in the figure. Before turning, the longer turning arm in the figure is in a horizontal state, while the turning arm in the shape of strip teeth is in a vertical state). At this time, the driving motor 37 operates and drives the mounting plate 35 to move on the first slide rail 36 through the lead screw 371. During the moving process, the strip-tooth-shaped turning arm under the second turning frame 34 cooperates with the strip-tooth-shaped turning arm under the first turning frame 24. At this time, the first turning frame 24 can be turned to 90°. Then, the second turning frame 34 is turned. The strip-tooth-shaped turning arm under the second turning frame 34 cooperates with the device. After the turning is completed, the driving motor 37 operates to pull the mounting plate 35 back to the starting position of the above action, and the welding robot at this position completes the welding work on the other side.

[0033] During the use of the present invention, the first buffer mechanism 4 or the second buffer mechanism 5 can realize the assistance or buffering during the turning process. Thus, on the one hand, it helps to reduce the load of the hydraulic system, helps to reduce energy consumption, and ensures the service life of the hydraulic system; on the other hand, it can avoid the impact of a large force during the rotation process, can reduce the wear and deformation during the operation of the device, and has a positive effect on reducing the maintenance and repair costs.

[0034] The present invention is not limited to the above best implementation mode. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as the present application, it falls within the protection scope of the present invention.

Claims

1. An equipment flipping workbench, characterized in that: It includes a first flipping mechanism and a second flipping mechanism; The first flipping mechanism and the second flipping mechanism cooperate to flip the equipment to be welded by 180°; the second flipping mechanism is movably arranged to transfer the flipped equipment to be welded from the first welding station to the second welding station; Flipping frames are provided in both the first flipping mechanism and the second flipping mechanism. The flipping frame includes two perpendicular flipping arms. The flipping frame rotates around the junction of its two flipping arms. A driving connection part is provided in the direction away from the junction. The driving power unit drives the driving connection part and drives the flipping frame to rotate; The flipping arms in the first flipping mechanism and the second flipping mechanism respectively include a pair of cooperating flipping arms in the shape of strip teeth. When the first flipping mechanism and the second flipping mechanism cooperate, the two flipping arms in the shape of strip teeth mesh with each other; Buffer mechanisms are also provided in both the first flipping mechanism and the second flipping mechanism. The buffer mechanism is arranged between the back sides of the two flipping arms. The buffer mechanism includes a spring. During each flipping process of the flipping frame, the spring experiences three states: compression, restoration, and stretching. At the beginning of flipping, it provides a forward thrust to help the flipping frame rotate, reducing the working load of the driving power unit. At the end of flipping, it provides a reverse thrust to inhibit the rotation of the flipping frame, buffering the flipping frame and reducing the impact force during flipping.

2. The device flipping workbench according to claim 1, characterized in that: The second flipping mechanism includes a mounting plate. The flipping frame, the buffer mechanism, and the driving power unit in the second flipping mechanism are all located above the mounting plate. The mounting plate is slidably arranged on the slide rail. The driving unit drives the mounting plate to slide. When the mounting plate moves to the first limit position, the strip-toothed flipping arm of the flipping frame in the second flipping mechanism cooperates with the strip-toothed flipping arm of the flipping frame in the first flipping mechanism. When the mounting plate moves to the second limit position, the flipping frame in the second flipping mechanism cooperates with the welding robot at the second welding station.

3. The flipping workbench of a device according to claim 1, characterized in that: The buffer mechanism includes a first buffer mechanism. A fixed arc-shaped channel is provided in the first buffer mechanism. A first arc-shaped connecting rod is inserted into the arc-shaped channel. The two ends of the first arc-shaped connecting rod are respectively hinged to the two flipping arms of the flipping frame. The first arc-shaped connecting rod is concentric with the arc-shaped channel and concentric with the rotation center of the flipping frame; a first connecting part is fixedly arranged in the arc-shaped channel. A second connecting part and a third connecting part are respectively arranged on the first arc-shaped connecting rod on both sides of the first connecting part. A first spring is arranged between the first connecting part and the second connecting part. The two ends of the first spring are respectively fixedly connected to the first connecting part and the second connecting part; a second spring is arranged between the first connecting part and the third connecting part. The two ends of the second spring are respectively fixedly connected to the first connecting part and the third connecting part.

4. The device turnover workbench according to claim 3, characterized in that: For the first spring and the second spring, when one is in the compressed state, the other is in the stretched state, and when one is in the free state, the other is also in the free state.

5. The device turnover workbench according to claim 1, characterized in that: The buffer mechanism described above includes a second buffer mechanism. In the second buffer mechanism, there is a moving arc-shaped channel. Inserted in the arc-shaped channel are a second arc-shaped connecting rod and a third arc-shaped connecting rod. A third spring is fixedly connected between the second arc-shaped connecting rod and the third arc-shaped connecting rod. The third spring is entirely located in the arc-shaped channel during the flipping process of the flipping frame. The other ends of the second arc-shaped connecting rod and the third arc-shaped connecting rod are respectively hinged to two flipping arms of the flipping frame. The second arc-shaped connecting rod, the third arc-shaped connecting rod, and the arc-shaped channel are concentrically arranged and eccentrically arranged with the rotation center of the flipping frame. One of the second arc-shaped connecting rod and the third arc-shaped connecting rod is fixedly arranged at the hinged part with the flipping arm, and the other is slidably arranged at the hinged part with the flipping arm.

6. The device turnover workbench according to claim 5, characterized in that: When the hinged part of the second arc-shaped connecting rod or the third arc-shaped connecting rod with the flipping arm is slidably arranged with the flipping arm, a slide rail is arranged on the corresponding flipping arm, and a slider is arranged on the slide rail. The slider is fixedly connected to the hinged part.

7. An equipment turnover workbench according to claim 6, characterized in that: When the flipping frame starts to flip, the torque exerted by the third spring on the flipping frame in the rotating direction is greater than the torque in the reverse rotating direction. When the flipping is about to end, the torque exerted by the third spring on the flipping frame in the rotating direction is less than the torque in the reverse rotating direction.

8. The equipment welding method for the equipment turning workbench according to any one of claims 1-7, characterized in that, It includes the following steps: The position where the first flipping frame starts to flip clockwise is recorded as the first position. After flipping 90° from the first position, the position where it starts to flip counterclockwise is recorded as the second position. The position where the second flipping frame starts to flip counterclockwise is recorded as the first position. After flipping 90° from the first position, the position where it starts to flip clockwise is recorded as the second position. S1. Place the equipment to be welded on the first flipping frame at the first position, and weld one side of the equipment by the welding robot at this station. S2. After one side of the equipment is welded, the first flipping frame flips. The second flipping frame flips from the first position to the second position at the welding station on the other side of the equipment and moves to the first flipping frame to cooperate with the first flipping frame. S3. The second flipping frame flips clockwise. After flipping to the first position, it drives the equipment back to the welding station on the other side of the equipment, and the welding robot at this station welds the other side of the equipment. The first flipping frame flips. After flipping to the first position, the flipping is completed. S4. Place the equipment that needs to be welded again on the first flipping frame, and transfer the equipment welded on the second flipping frame. S5. Repeat S1 - S4 to complete the cyclic welding of the equipment.

9. The device welding method of the device turning workbench according to claim 8, characterized in that: In S2 - S3, during the cooperation process between the first flipping frame and the second flipping frame, the angle by which the first flipping frame flips first from the first position is greater than or equal to 80° and less than 90°. The second flipping frame flips 90° from the first position to the second position. After cooperating with the first flipping frame, the first flipping frame continues to flip until the second position. Then, the second flipping frame flips 90° to the first position.

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