Rotary clamp automatic switching device

Abstract

The utility model relates to a rotary type clamp automatic switching device which comprises a rotary type storage location formed by a plurality of storage locations in a rotary type end-to-end communication mode. The working storage location is communicated with one of the rotary storage locations; the concentric-square-shaped traction mechanism is used for bearing and driving the clamp to move on each storage location of the rotary storage location; the transfer traction mechanism is used for transferring the clamp to the working storage location; the plurality of limiting guide devices are respectively arranged between every two adjacent storage positions of the rotary storage positions and between the transfer traction mechanism and the rotary storage positions; a clamp identification sensor and a control system. The welding fixture switching device overcomes the defect that the storage positions of the existing welding fixture switching device are linearly arranged and need to occupy more installation sites. According to the utility model, the problem that too many mounting sites are occupied is solved by adopting a rotary parking space arrangement mode, the space utilization rate is higher, and the integration density in the space is higher.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and in particular to an automatic switching device for rotary fixtures. Background Technology

[0002] To accommodate the flexible co-production of multiple vehicle models and maximize equipment capacity, the welding production line designs welding fixtures and handling fixtures specifically for each vehicle model. When switching production models, the welding fixtures and handling fixtures are switched to achieve this changeover. Traditionally, switching welding fixtures and handling fixtures involves manually pushing a switching trolley onto the automatic line's switching mechanism, pulling out the fixture, manually pushing it to the fixture storage area, and then manually pushing the required fixture and switching trolley into the automatic line. This process takes over 7 minutes. The weight of the fixtures slows the pushing speed, makes it difficult to align with the switching mechanism, and results in insufficient switching time, impacting equipment uptime. Furthermore, the fixtures themselves are heavy; for some lines (such as side panels and internal skeleton lines), the welding fixtures and handling fixtures are particularly heavy, requiring stacking of handling fixtures on top of the welding fixtures, resulting in a total weight of 5-6 tons. This necessitates multiple operators working simultaneously, placing a heavy burden on the equipment operators.

[0003] To address the time-consuming and labor-intensive nature of manual welding operations, automated welding fixture switching equipment has emerged. This type of equipment typically uses a horizontal or vertical matrix arrangement of fixture bays, connecting the central main conveyor track to different bays to facilitate the switching of different fixtures. To ensure that fixtures from each bay can be transported to the main conveyor track, this linear arrangement requires a longer main conveyor track, which also occupies more horizontal and vertical space. This necessitates more space for existing production plant renovations, making equipment installation more challenging. Furthermore, with limited space, the number of bays must be compromised. Utility Model Content

[0004] Therefore, the purpose of this invention is to overcome the shortcomings of existing welding fixture switching equipment, which uses a linear arrangement of storage locations and requires more installation space, by providing a rotary fixture automatic switching device. This invention uses a rotary layout of storage locations to reduce the problem of occupying too much installation space, achieving higher space utilization and higher integration density within the space.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An automatic rotary clamp switching device includes:

[0007] A rotary storage unit consists of several storage units connected end to end in a rotary fashion;

[0008] The working storage location is connected to one of the storage locations in the rotary storage location;

[0009] A loop-shaped traction mechanism is located below the rotary storage location and is used to support and drive the clamps to rotate on each storage location of the rotary storage location;

[0010] A transfer traction mechanism is provided between the working storage location and the rotary storage location for transferring the clamp to the working storage location;

[0011] Several limiting and guiding devices are respectively installed between each adjacent storage space of the rotary storage space, and between the transfer traction mechanism and the rotary storage space;

[0012] A clamp identification sensor is mounted on the loop-shaped traction mechanism;

[0013] The control system is connected to the loop traction mechanism, the transfer traction mechanism, the limit guide device, and the clamp identification sensor, respectively.

[0014] This utility model employs a rotary storage unit layout to reduce the problem of occupying too much installation space. Unlike traditional linear or array-style storage unit arrangements, the rotary layout allows for storage units to be placed even at corners, resulting in higher space utilization. Furthermore, the rotary, converging arrangement, rather than a linear or array-style radial arrangement, leads to higher integration density within the space and more rational use of the layout space. Simultaneously, a rotary traction mechanism drives the clamps within the storage units to sequentially pass through each unit. Clamp identification sensors identify the type of clamp that passes through. The control system analyzes whether the next fixture is needed and uses a limit guide device to control the passage and stop of the fixture in different storage locations. When the fixture to be used arrives at the storage location connected to the working storage location, the control system controls the transfer traction mechanism to move the fixture in that storage location to the working storage location. This utility model has a fixture pre-switching function, which can switch the fixtures of the next batch of models to the pre-switching storage location in advance according to the production plan. According to the current production plan of the automatic line, the fixtures are automatically switched and selected without manual intervention, thus minimizing labor costs.

[0015] Furthermore, the rotary storage unit comprises six interconnected storage units arranged in a two-row, three-column layout; the working storage unit is connected to the middle storage unit in one of the rows. The six storage units represent the most compact layout, maximizing space efficiency. This means the fixture storage unit can hold up to five types of fixtures. The working storage unit stores fixtures for the currently produced vehicle model. The storage unit connected to the working storage unit is a transfer storage unit. The storage unit preceding the transfer unit along the conveying direction is a pre-switching storage unit, storing fixtures for the next produced vehicle model. The transfer storage unit does not store fixtures. The remaining storage units are fixture storage units, used to store fixtures for models not currently in production. The movement of fixtures is entirely controlled by the control system, requiring no manual intervention, thus minimizing personnel costs and reducing the workload of equipment operators.

[0016] Furthermore, the loop-shaped traction mechanism includes four first servo traction mechanisms connected end to end, a first conveying base arranged in the conveying direction of the four first servo traction mechanisms, and a first positioning mechanism disposed on the first conveying base and located in each storage position.

[0017] Furthermore, the first servo traction mechanism includes a guide rail, a traction pin sliding on the guide rail, and a servo motor for driving the traction pin to reciprocate on the guide rail, the servo motor being connected to the control system.

[0018] The first conveying base includes a conveying frame arranged on both sides of the guide rail, a plurality of universal ball bearings and a first ball bearing arranged on the support plane of the conveying frame, and a second ball bearing arranged on both sides of the conveying frame. The axis of the first ball bearing is parallel to the support plane of the conveying frame, and the axis of the second ball bearing is perpendicular to the support plane of the conveying frame. The support in the height direction is provided by the universal ball bearings and the first ball bearings, and the lateral support, limiting and guiding are all provided by the second ball bearings.

[0019] The first positioning mechanism includes a positioning pin and a first lifting cylinder whose output end is connected to the positioning pin. The first lifting cylinder is connected to the control system. The first lifting cylinder controls the positioning pin to extend and enter the traction pin hole of the clamp, thereby realizing the transfer of the clamp between various storage positions.

[0020] Furthermore, the transfer traction mechanism includes a second servo traction mechanism identical to the first servo traction mechanism, a second transmission base arranged in the conveying direction of the second servo traction mechanism, and a second positioning mechanism disposed on the second transmission base and located in the working position.

[0021] Furthermore, the length of the second transfer base is at least the length of one of the working bays. The length of the second transfer base, reserved for the length of one of the working bays, ensures the switching rhythm of the fixtures. If a fixture is used incorrectly or is damaged, it can be transferred and waited on the second transfer base, or the faulty fixture can be returned from the working bay to the second transfer base for repair.

[0022] Furthermore, the limiting and guiding device includes a limiting plate, a swing mechanism connected to the limiting plate, and a second lifting cylinder whose output end is connected to the swing mechanism; the limiting plate is also provided with a third ball bearing for guiding.

[0023] It should be noted that the swing mechanism can use a triangular hinged linkage to enable the limiting plate to swing up and down around a certain axis.

[0024] Furthermore, the limiting plate, driven by the swing mechanism, enters and exits the conveying channel between two adjacent storage locations in a flipping manner, as well as the conveying channel between the transfer traction mechanism and the rotary storage location.

[0025] The limiting guide device restricts the transmission of the clamp between different storage positions or between the storage position and the rotating traction mechanism by swinging up and down. When the limiting plate of the limiting guide device is swung up, it provides lateral guidance for the clamp, and the clamp cannot be transmitted in the direction of the limiting guide device. When the limiting plate of the limiting guide device is swung down, the clamp can be transmitted in the direction of the mechanism.

[0026] Furthermore, the fixture identification sensor is an RFID reader / writer. The fixture identification sensor is an RFID-type sensor; each fixture has an RFID chip pre-set with the fixture's ID number. The fixture identification sensor, being an RFID reader / writer, can read the ID number built into the chip and transmit it to the control system for identification.

[0027] Furthermore, it also includes a switching trolley connected to one of the rotary storage locations, and the limiting guide device is provided between the switching trolley and the rotary storage location. By docking the switching trolley at one of the storage locations, the clamps in the clamp storage can be switched via the off-line switching trolley, thus supporting the switching function of multiple clamps.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] (1) This utility model adopts a rotary layout of storage locations to reduce the problem of occupying too much installation space. It is set as a rotary layout, which is different from the traditional linear or array-type storage location layout. The rotary layout can also set up storage locations at the corners, which can have a higher space utilization rate. At the same time, it is arranged in a rotary and converging shape, rather than a linear or array-type radial layout. The integration density in the space is higher, and the layout space can be used more rationally.

[0030] (2) This utility model utilizes a loop-shaped traction mechanism to drive the clamps in the storage position to pass through each storage position in sequence. The clamp identification sensor identifies the model of the clamp that has passed through. The control system analyzes whether it is the next clamp that needs to be used. The limit guide device is used to control the passage and stop of the clamps in different storage positions. When the clamp that needs to be used reaches the storage position connected to the working storage position, the control system controls the transfer traction mechanism to perform the corresponding action to transfer the clamp in the storage position to the working storage position. This utility model has a clamp pre-switching function. According to the production plan, the clamps of the next batch of models can be switched to the pre-switching storage position in advance. According to the current production plan of the automatic line, the clamps are automatically switched and selected without manual intervention, thus maximizing the reduction of personnel costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the storage location partitioning for a rotary storage location in one embodiment;

[0032] Figure 2 This is a schematic diagram of the overall structure of an automatic switching device for rotary clamps in one embodiment;

[0033] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0034] Figure 4 for Figure 2 A magnified view of a section at point B.

[0035] 1-Rotary storage location, 2-Working storage location, 3-Transfer traction mechanism, 31-Second servo traction mechanism, 32-Second conveyor base, 33-Second positioning mechanism, 4-Limiting guide device, 41-Limiting plate, 42-Swing mechanism, 421-First rotating shaft, 422-First connecting block, 423-Second rotating shaft, 424-Second connecting block, 425-Third connecting block, 43-Second lifting cylinder, 44-Third ball bearing, 51-First servo traction mechanism, 511-Guide rail, 512-Traction pin, 513-Servo motor, 52-First conveyor base, 521-Conveyor frame, 522-Universal ball bearing, 523-First ball bearing, 524-Second ball bearing, 53-First positioning mechanism, 531-Positioning pin, 532-First lifting cylinder, 6-Switching trolley, 7-Fixed identification sensor. Detailed Implementation

[0036] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Example 1

[0040] like Figure 1 , Figure 2 The first embodiment shown is a rotary fixture automatic switching device, comprising:

[0041] Rotary storage location 1 is composed of several storage locations connected end to end in a rotary manner;

[0042] Working storage location 2 is connected to one of the storage locations in rotary storage location 1;

[0043] A loop-shaped traction mechanism is located below the rotary storage location 1 and is used to support and drive the clamps to rotate in each storage location of the rotary storage location 1;

[0044] The transfer traction mechanism 3 is located between the working storage location 2 and the rotary storage location 1 and is used to transfer the clamp to the working storage location 2.

[0045] Several limiting and guiding devices 4 are respectively installed between each adjacent storage location of the rotary storage location 1, and between the transfer traction mechanism 3 and the rotary storage location 1;

[0046] The clamp identification sensor 7 is mounted on the loop-shaped traction mechanism;

[0047] The control system is connected to the loop traction mechanism 3, the transfer traction mechanism 3, the limit guide device 4, and the clamp identification sensor 7, respectively.

[0048] like Figure 1 As shown, the rotary storage location 1 consists of six storage locations connected end to end, arranged in two rows and three columns; the working storage location 2 is connected to the middle storage location in one of the rows.

[0049] like Figure 1 As shown, this embodiment includes six storage locations: A, B, C, D, E, and F. The working storage location 2 is storage location G. Setting up six storage locations is the most compact layout, saving installation space to the greatest extent. Six storage locations mean that the fixture storage can hold up to 5 types of fixtures. Storage location G is used to store fixtures for the currently produced vehicle model. The storage location connected to storage location G is the transfer storage location B. The storage location preceding transfer storage location B along the conveying direction is the pre-switching storage location A, which stores fixtures for the next produced vehicle model. Transfer storage location B does not store fixtures. The remaining storage locations are all fixture storage locations, used to store fixtures for vehicles that are not currently being produced. The flow of fixtures is controlled by the control system throughout the process without manual intervention, maximizing the reduction of personnel costs and the reduction of the load on equipment operators.

[0050] In this embodiment, as Figure 1 As shown, the fixture identification sensor 7 is located in storage location A.

[0051] In this embodiment, the fixture switching step is as follows:

[0052] When the automated production line is producing the current vehicle model, the fixture library can automatically switch the fixtures corresponding to the next batch of vehicle models to the pre-switching location A, reducing the fixture switching time to within 3 minutes.

[0053] S1: Use the clamp identification sensor 7 on storage location A to determine whether it is the clamp number corresponding to the next vehicle model;

[0054] S2: If not, the loop traction mechanism will transfer the clamp on storage location A to storage location B, the clamp on storage location F to storage location A, the clamp on storage location E to storage location F, the clamp on storage location D to storage location E, the clamp on storage location C to storage location D, and the clamp on storage location B to storage location C.

[0055] S3: At this point, determine whether the fixture in storage location A is the fixture required for the next vehicle model. If not, repeat step S2.

[0056] S4: Repeat this process until the fixture in storage location A is the fixture required for the next vehicle model, and the pre-switching is complete;

[0057] S5: When the clamps at storage location G are used up, the transfer traction mechanism 3 will transfer the clamps at storage location G to storage location B.

[0058] S6: The loop-shaped traction mechanism transfers the clamps at storage location B to storage location C, and the clamps at storage location A to storage location B.

[0059] S7: The transfer traction mechanism 3 transfers the fixture to be used in storage location C to storage location G, completing one fixture switch.

[0060] like Figure 2 and Figure 3 As shown, the loop-shaped traction mechanism includes four first servo traction mechanisms 51 connected end to end, a first conveying base 52 arranged in the conveying direction of the four first servo traction mechanisms 51, and a first positioning mechanism 53 disposed on the first conveying base 52 and located in each storage position.

[0061] like Figure 3 As shown, the first servo traction mechanism 51 includes a guide rail 511, a traction pin 512 sliding on the guide rail 511, and a servo motor 513 for driving the traction pin 512 to reciprocate on the guide rail 511. The servo motor 513 is connected to the control system. In this embodiment, the traction pin 512 is driven to rise and fall by a cylinder, which is connected to the control system.

[0062] like Figure 3 As shown, the first conveying base 52 includes a conveying frame 521 arranged on both sides of the guide rail 511, a plurality of universal ball bearings 522 and a first ball bearing 523 arranged on the support plane of the conveying frame 521, and a second ball bearing 524 arranged on both sides of the conveying frame 521. The axis of the first ball bearing 523 is parallel to the support plane of the conveying frame 521, and the axis of the second ball bearing 524 is perpendicular to the support plane of the conveying frame 521. The support in the height direction is provided by the universal ball bearings 522 and the first ball bearings 523, and the lateral support, limiting and guiding are all provided by the second ball bearings 524.

[0063] like Figure 3 As shown, the first positioning mechanism 53 includes a positioning pin 531 and a first lifting cylinder 532 whose output end is connected to the positioning pin 531. The first lifting cylinder 532 is connected to the control system. The first lifting cylinder 532 controls the positioning pin 531 to extend and enter the traction pin 512 hole of the clamp, thereby realizing the transfer of the clamp between various storage positions.

[0064] like Figure 2 As shown, the transfer traction mechanism 3 includes a second servo traction mechanism 31 that is the same as the first servo traction mechanism 51, a second transmission base 32 arranged in the transmission direction of the second servo traction mechanism 31, and a second positioning mechanism 33 disposed on the second transmission base 32 and located in the working position 2.

[0065] In this embodiment, the length of the second transfer base 32 is the length of one working bay 2. The length of the second transfer base 32, which is reserved for the length of one working bay 2, can ensure the switching rhythm of the fixtures. If the fixture is picked up incorrectly or is damaged, it can be transferred and waited on the second transfer base 32, or the incorrect fixture can be returned from the working bay 2 to the second transfer base 32 for repair.

[0066] like Figure 4 As shown, the limiting guide device 4 includes a limiting plate 41, a swing mechanism 42 connected to the limiting plate 41, and a second lifting cylinder 43 whose output end is connected to the swing mechanism 42; the limiting plate 41 is also provided with a third ball bearing 44 for guiding.

[0067] like Figure 4 As shown, the swing mechanism 42 includes a first connecting block 422 rotatably connected to the side wall of the second lifting cylinder 43 about the first rotating shaft 421, a second connecting block 424 rotatably connected to the output shaft of the second lifting cylinder 43 about the second rotating shaft 423, and a third connecting block 425 fixedly connected to the limiting plate 41. The first connecting block 422 and the third connecting block 425 are fixedly connected, and the second connecting block 424 and the third connecting block 425 are rotatably connected.

[0068] In this embodiment, the limiting plate 41, driven by the swing mechanism 42, enters and exits the conveying channel between two adjacent storage locations in a flipping manner, as well as the conveying channel between the transfer traction mechanism 3 and the rotary storage location 1.

[0069] The limiting guide device 4 restricts the transmission of the clamp between different storage positions or between the storage position and the rotating traction mechanism by swinging up and down. When the limiting plate 41 of the limiting guide device 4 is swung up, it provides lateral guidance for the clamp, and the clamp cannot be transmitted in the direction of the limiting guide device 4. When the limiting plate 41 of the limiting guide device 4 is swung down, the clamp can be transmitted in the direction of the mechanism.

[0070] The advantages of this embodiment are: It adopts a rotary layout for storage locations, reducing the need for excessive installation space. Unlike traditional linear or array-style storage location arrangements, the rotary layout allows for storage locations even at corners, resulting in higher space utilization. Furthermore, the rotary, converging arrangement, rather than a linear or array-style radial arrangement, leads to higher integration density and more efficient use of space. Simultaneously, the rotary traction mechanism allows the clamps within the storage locations to pass sequentially through each location, and the clamp identification sensor 7 identifies the type of clamp that passes through. The control system analyzes whether the next fixture is needed and uses the limit guide device 4 to control the movement and stop of the fixture between different storage locations. When the fixture to be used arrives at the storage location connected to the working storage location 2, the control system controls the transfer traction mechanism 3 to move the fixture in the storage location to the working storage location 2. This embodiment has a fixture pre-switching function, which can switch the fixtures of the next batch of models to the pre-switching storage location in advance according to the production plan. According to the current production plan of the automatic line, the fixtures are automatically switched and selected without manual intervention, thus maximizing the reduction of personnel costs.

[0071] Example 2

[0072] This embodiment is similar to Embodiment 1, except that in this embodiment:

[0073] like Figure 1 and Figure 3 As shown, the fixture identification sensor 7 is an RFID reader / writer. The fixture identification sensor 7 is an RFID type sensor; each fixture has an RFID chip pre-set with the fixture's ID number. The fixture identification sensor 7, being an RFID reader / writer, can read the ID number built into the chip and send it to the control system for identification.

[0074] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0075] Example 3

[0076] This embodiment is similar to Embodiment 1, except that in this embodiment:

[0077] like Figure 2 As shown, it also includes a switching trolley 6 connected to one of the storage locations in the rotary storage location 1. A limit guide device 4 is also provided between the switching trolley 6 and the rotary storage location 1. The switching trolley 6 is docked at one of the storage locations to realize the switching of fixtures in the fixture storage through the off-line switching trolley 6, realizing the switching function of "5+N" fixtures.

[0078] like Figure 1 and Figure 2As shown, the automatic cyclic switching device in this embodiment can store clamps for a maximum of 5 vehicle models. When the 6th vehicle model is imported, the clamp that is not currently in use can be pulled out at storage location D and replaced with the 6th clamp. The specific switching steps for the "5+N" clamps in this embodiment are as follows:

[0079] S1: Select the required fixture on the online body operation screen. The fixture recognition sensor 7 at storage location D determines whether it is the selected fixture. If not, the device in this embodiment will cyclically transfer the fixture to storage location D until the required fixture is found.

[0080] S2: Manually push the fixture switching trolley 6 to storage location D, the limit guide device 4 is lowered, the positioning pin 531 of storage location D is lowered, and the manual person moves the fixture to the switching trolley 6.

[0081] S3: Manually push the 6th clamp and the switching trolley 6 to storage location D. After pushing the clamp to storage location D, the limit guide device 4 is placed, and the positioning pin 531 of storage location D rises to complete the switching.

[0082] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automatic switching device for rotary clamps, characterized in that, include: Rotary storage location (1) is composed of several storage locations connected end to end in a rotary manner; The working storage location (2) is connected to one of the storage locations in the rotary storage location (1); A loop-shaped traction mechanism is provided below the rotary storage position (1) and is used to carry and drive the clamp to rotate on each storage position of the rotary storage position (1); A transfer traction mechanism (3) is provided between the working storage position (2) and the rotary storage position (1) for transferring the clamp to the working storage position (2). Several limiting and guiding devices (4) are respectively provided between each adjacent storage position of the rotary storage position (1) and between the transfer traction mechanism (3) and the rotary storage position (1); A clamp identification sensor (7) is installed on the loop-shaped traction mechanism; The control system is connected to the loop traction mechanism, the transfer traction mechanism (3), the limiting guide device (4), and the clamp identification sensor (7), respectively.

2. The rotary clamp automatic switching device according to claim 1, characterized in that, The rotary storage unit (1) includes six storage units connected end to end, arranged in two rows and three columns; the working storage unit (2) is connected to the middle storage unit in one of the rows.

3. The rotary clamp automatic switching device according to claim 2, characterized in that, The loop-shaped traction mechanism includes four first servo traction mechanisms (51) connected end to end, a first conveying base (52) arranged in the conveying direction of the four first servo traction mechanisms (51), and a first positioning mechanism (53) provided on the first conveying base (52) and located in each storage position.

4. The rotary clamp automatic switching device according to claim 3, characterized in that, The first servo traction mechanism (51) includes a guide rail (511), a traction pin (512) sliding on the guide rail (511), and a servo motor (513) for driving the traction pin (512) to reciprocate on the guide rail (511), the servo motor (513) being connected to the control system. The first conveying base (52) includes a conveying frame (521) arranged on both sides of the guide rail (511), a plurality of universal ball bearings (522) and a first ball bearing (523) arranged on the support plane of the conveying frame (521), and a second ball bearing (524) arranged on both sides of the conveying frame (521). The axis of the first ball bearing (523) is parallel to the support plane of the conveying frame (521), and the axis of the second ball bearing (524) is perpendicular to the support plane of the conveying frame (521). The first positioning mechanism (53) includes a positioning pin (531) and a first lifting cylinder (532) whose output end is connected to the positioning pin (531). The first lifting cylinder (532) is connected to the control system.

5. The rotary clamp automatic switching device according to claim 3, characterized in that, The transfer traction mechanism (3) includes a second servo traction mechanism (31) that is the same as the first servo traction mechanism (51), a second transmission base (32) arranged in the transmission direction of the second servo traction mechanism (31), and a second positioning mechanism (33) provided on the second transmission base (32) and located in the working position (2).

6. The rotary clamp automatic switching device according to claim 5, characterized in that, The length of the second transmission base (32) is at least the length of one of the working storage positions (2).

7. The rotary clamp automatic switching device according to claim 1, characterized in that, The limiting guide device (4) includes a limiting plate (41), a swing mechanism (42) connected to the limiting plate (41), and a second lifting cylinder (43) whose output end is connected to the swing mechanism (42); the limiting plate (41) is also provided with a third ball bearing (44) for guiding.

8. The rotary clamp automatic switching device according to claim 7, characterized in that, The limiting plate (41) moves in and out of the conveying channel between two adjacent storage locations in a flipping manner under the drive of the swing mechanism (42), as well as in and out of the conveying channel between the transfer traction mechanism (3) and the rotary storage location (1).

9. The rotary clamp automatic switching device according to claim 1, characterized in that, The fixture identification sensor (7) is an RFID reader / writer.

10. The rotary clamp automatic switching device according to claim 1, characterized in that, It also includes a switching trolley (6) connected to one of the rotary storage locations (1), and the limiting guide device (4) is provided between the switching trolley (6) and the rotary storage location (1).

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