A multi-station workpiece clamping positioning device

Abstract

The application discloses a multi-station workpiece clamping and positioning device, and belongs to the technical field of machining equipment. The multi-station workpiece clamping and positioning device comprises a PLC controller, a rotating disc, clamps arranged on the rotating disc and in a ring shape, and a rotating structure arranged at a position below the rotating disc. The multi-station workpiece clamping and positioning device further comprises a turnover structure arranged on the rotating disc and connected with the corresponding clamps. The multi-station workpiece clamping and positioning device can turn idle clamps to the bottom of the rotating disc according to machining requirements, so that the clamps can be selected as required, the machining adaptability of the device is improved, idle clamps can effectively avoid interfering with machining processes, adjacent clamps are protected through the arrangement of a protection structure, machining debris is prevented from splashing onto workpieces on adjacent clamps, the machining quality of the workpieces is ensured, the idle clamp positions are protected, and the machining adaptability of the device is further improved.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, specifically a multi-station workpiece clamping and positioning device. Background Technology

[0002] In the field of machining, multi-station workpiece clamping and positioning devices are widely used in the mass production of various parts because they can realize continuous and automated workpiece processing. The core of the device is to use a turntable to drive the ring-shaped fixtures to complete the station change, realize the continuous processing of multiple processes, and effectively improve processing efficiency.

[0003] However, the fixtures on the turntable of traditional multi-station workpiece clamping and positioning devices are mostly fixed in arrangement. All fixtures are always on the machining surface of the turntable, making it impossible to flexibly select the number of fixtures to use according to the actual number of machining processes. When there are few machining processes, the idle fixtures will be exposed in the machining area, which will not only interfere with the movement of the machining equipment and workpieces, affecting normal machining operations and station repositioning, but also reduce the adaptability of the device to different machining processes. It is difficult to adapt to the flexible machining needs of multiple specifications and multiple processes. In addition, metal debris generated at each station during the machining process is very easy to splash to adjacent stations, which will contaminate the workpieces to be processed or already processed on adjacent fixtures, causing scratches on the workpiece surface, reduced machining accuracy, and affecting the machining quality of the workpiece.

[0004] Therefore, this application provides a multi-station workpiece clamping and positioning device to solve the above problems. Summary of the Invention

[0005] This application provides a multi-station workpiece clamping and positioning device, which aims to solve the problems mentioned in the background art, such as the fixed arrangement of clamps in existing multi-station workpiece clamping and positioning devices, the inability to flexibly select the use of clamps according to the number of processing steps, the easy interference of idle clamps with processing, poor device adaptability, and the lack of effective protection leading to the splashing of processing debris that contaminates the workpiece and affects the processing quality.

[0006] To achieve the above objectives, this application provides the following technical solution: a multi-station workpiece clamping and positioning device, comprising a PLC controller, a turntable, clamps arranged in a ring on the turntable for clamping and positioning workpieces, and a rotating structure arranged below the turntable for rotating the clamps on the turntable to change position. The multi-station workpiece clamping and positioning device further comprises a flipping structure arranged on the turntable and connected to the corresponding clamps for flipping the clamps to the bottom of the turntable. The flipping structure includes a through slot opened on the turntable corresponding to the position of the fixture, a flipping plate disposed in the through slot, a sensor fixedly installed on the flipping plate for detecting the workpiece processing status, and a drive assembly disposed on the turntable for flipping the flipping plate in the through slot. The turntable has protective structures on the outer sides of the multiple through slots to protect each pair of adjacent fixtures. The sensor is connected to the input terminal of the PLC controller, and the protective structure, rotating structure, and drive assembly are all connected to the output terminal of the PLC controller. By setting up a flipping structure composed of a drive assembly, a flipping plate, and through slots, the drive assembly can drive the flipping plate to flip within the through slots according to processing requirements, flipping idle fixtures to the bottom of the turntable. The fixtures to be used can be selected as needed, which not only improves the processing adaptability of the device but also avoids idle fixtures interfering with the processing steps. At the same time, by setting up protective structures to protect adjacent fixtures, it can not only reduce the splashing of debris onto the workpieces on adjacent fixtures during processing, ensuring the quality of workpiece processing, but also protect the idle fixture positions, further improving the processing adaptability of the device.

[0007] Preferably, to achieve workpiece clamping, the fixture includes fixed seats symmetrically fixedly mounted on the flip plate, fixed clamping blocks fixedly mounted between the two fixed seats, sliding clamping blocks slidably connected between the two fixed seats and disposed opposite to the fixed clamping blocks, connecting seats fixedly mounted on the outer side of the two fixed clamping blocks near the sliding clamping blocks, and a servo electric cylinder fixedly mounted on the connecting seats. The piston rod of the servo electric cylinder is fixedly connected to the side of the sliding clamping block away from the fixed clamping blocks. The servo electric cylinder is connected to the output terminal of the PLC controller. The PLC controller controls the extension and retraction of the servo electric cylinder, which drives the sliding clamping blocks to slide along the fixed seats, so that the sliding clamping blocks and the fixed clamping blocks cooperate to complete the clamping and releasing of the workpiece, which can adapt to the clamping requirements of workpieces of different sizes.

[0008] Preferably, in order to achieve the flipping drive of the flipping plate in the through slot, the drive assembly includes a connecting shaft that runs horizontally through the flipping plate and is rotatably connected in the through slot, a second motor that is fixedly installed at the outer edge of the turntable for driving the connecting shaft to rotate, and a protective box that covers the outside of the second motor and is fixedly connected to the turntable. The second motor is connected to the output terminal of the PLC controller. The PLC controller controls the rotation of the second motor, which drives the connecting shaft that runs horizontally through the flipping plate to rotate synchronously, thereby driving the flipping plate to flip around the connecting shaft in the through slot, realizing the flipping and storage of idle fixtures. At the same time, the design of the protective box can protect the second motor and prevent processing debris from damaging the second motor.

[0009] Preferably, in order to realize the rotation of the fixture driven by the turntable, the rotating structure includes a fixed column located below the turntable for fixing to the processing platform or chassis, and a motor fixedly installed in the fixed column for driving the turntable to rotate. The motor is connected to the output terminal of the PLC controller. By controlling the rotation of the motor fixed in the fixed column through the PLC controller, the turntable is directly driven to rotate around its own central axis, which can drive the fixture on the turntable to complete the workstation change, which is simple and convenient.

[0010] Preferably, to protect each adjacent fixture, the protective structure includes a concave baffle that runs longitudinally through the turntable and is slidably connected to the turntable corresponding to the outer side of the through slot, and a lifting assembly disposed outside the fixed column for raising and lowering the concave baffle. The lifting assembly drives the concave baffle to rise and fall vertically along the turntable. During processing, the concave baffle rises to form a surrounding isolation between two adjacent fixtures, leaving only an opening facing the processing equipment to ensure processing operations. When the fixture needs to be repositioned, the concave baffle is first driven to fall to avoid the turntable from rotating. After the turntable has rotated to the correct position, the concave baffle is driven to rise and reset to form protection. This allows for flexible switching between the protection state and the repositioning state, reducing debris contamination of the workpieces on adjacent fixtures and ensuring the quality of workpiece processing.

[0011] Preferably, to achieve the lifting and lowering of the concave baffles, the lifting assembly includes a collar sleeved on the outside of the fixed column, a connecting frame fixedly installed on the collar and fixedly connected to the corresponding concave baffle, a second servo electric cylinder fixedly installed on the processing platform or chassis and located below one of the connecting frames, and a telescopic rod fixedly installed on the processing platform or chassis and located below the other connecting frame. The piston rod of the second servo electric cylinder and the telescopic end of the telescopic rod are both fixedly connected to the collar. The second servo electric cylinder is connected to the output terminal of the PLC controller. The PLC controller controls the extension and retraction of the second servo electric cylinder, which drives the collar sleeved on the outside of the fixed column to rise and fall vertically. The collar drives all the concave baffles to rise and fall synchronously through the connecting frame, while the telescopic rod can guide and assist in the lifting and lowering of the collar, thereby ensuring that all the concave baffles rise and fall synchronously.

[0012] Preferably, in order to ensure the connection and use of the concave baffle, the turntable is provided with a lifting groove at the position corresponding to the concave baffle for the concave baffle to pass through and slide. The design of the lifting groove provides dedicated moving space for the lifting of the concave baffle, and at the same time limits the horizontal displacement of the concave baffle to prevent the concave baffle from deviating or jamming during the lifting process, ensuring the smoothness and stability of the lifting action of the concave baffle, and ensuring that it can form isolation and protection for the clamp after it is raised.

[0013] Preferably, in order to reduce the damage to the concave baffle caused by the impact of machining debris and the rebound of debris, a rubber pad for buffer protection is fixedly installed on the side of the concave baffle near the through groove; by fixing the rubber pad on the side of the concave baffle near the through groove, the debris splashed during machining first comes into contact with the rubber pad, and the rubber pad buffers the impact force of the debris through its own elasticity, which not only avoids the concave baffle from being worn and deformed by direct impact of hard debris, but also reduces the damage caused by debris rebounding to the surface of the workpiece, thereby further ensuring the surface quality of the workpiece.

[0014] This multi-station workpiece clamping and positioning device, by setting up a flipping structure consisting of a drive assembly, a flipping plate and a through slot, can use the drive assembly to drive the flipping plate to flip in the through slot according to the processing requirements, flipping the idle fixture to the bottom of the turntable, and selecting the fixture to use as needed. This not only improves the processing adaptability of the device, but also avoids the idle fixture from interfering with the processing process. This multi-station workpiece clamping and positioning device protects two adjacent fixtures by setting up a protective structure. This not only reduces the splashing of debris onto the workpieces on the adjacent fixtures during processing, ensuring the quality of workpiece processing, but also protects the idle fixture positions, further improving the processing adaptability of the device. This multi-station workpiece clamping and positioning device fixes a rubber pad near the concave baffle on the side close to the through groove, so that the debris splashed during processing first comes into contact with the rubber pad. The rubber pad buffers the impact force of the debris through its own elasticity, which not only avoids the direct impact of hard debris causing wear and deformation of the concave baffle, but also reduces the amount of debris rebounding to the surface of the workpiece and causing scratches, thus further ensuring the surface quality of the workpiece. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the application structure of a multi-station workpiece clamping and positioning device. Figure 2 This is a schematic diagram of a multi-station workpiece clamping and positioning device. Figure 3 This is a schematic diagram of a multi-station workpiece clamping and positioning device after one of the clamps has been flipped. Figure 4 This is a schematic diagram of the structure of a turntable in a multi-station workpiece clamping and positioning device. Figure 5 This is a schematic diagram of the fixture in a multi-station workpiece clamping and positioning device. Figure 6 This is a schematic diagram of a flipping structure in a multi-station workpiece clamping and positioning device. Figure 7 This is a schematic diagram of the lifting component in a multi-station workpiece clamping and positioning device.

[0016] In the picture: 1. Turntable; 11. Lifting trough; 2. Fixture; 21. Fixed base; 22. Fixed clamping block; 23. Sliding clamping block; 24. Connecting base; 25. Servo electric cylinder one; 3. Rotating structure; 31. Fixed column; 32. Motor 1; 4. Flipping structure; 41. Through slot; 42. Flipping plate; 43. Drive assembly; 431. Connecting shaft; 432. Motor II; 433. Protective box; 5. Protective structure; 51. Concave baffle; 511. Rubber pad; 52. Lifting assembly; 521. Collar; 522. Connecting frame; 523. Servo electric cylinder II; 524. Telescopic rod. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Example 1 This embodiment provides a multi-station workpiece clamping and positioning device, such as... Figures 1-7 As shown, the multi-station workpiece clamping and positioning device includes a PLC controller, a turntable 1, clamps 2 arranged in a ring on the turntable 1 for clamping and positioning workpieces, and a rotating structure 3 located below the turntable 1 for rotating the clamps 2 on the turntable 1. The multi-station workpiece clamping and positioning device also includes a flipping structure 4 arranged on the turntable 1 and connected to the corresponding clamps 2 for flipping the clamps 2 to the bottom of the turntable 1. The flipping structure 4 includes a through slot 41 on the turntable 1 corresponding to the position of the clamps 2, a flipping plate 42 arranged in the through slot 41, a sensor fixedly installed on the flipping plate 42 for detecting the workpiece processing status, and a drive assembly 43 arranged on the turntable 1 for flipping the flipping plate 42 in the through slot 41. A protective structure 5 is provided on the outside of the multiple through slots 41 on the turntable 1 to protect each pair of adjacent clamps 2. The sensor is connected to the input terminal of the PLC controller, and the protective structure 5, the rotating structure 3, and the drive assembly 43 are all connected to the output terminal of the PLC controller.

[0019] The rotating structure 3 includes a fixing column 31 located below the turntable 1 for fixing to the processing platform or chassis, and a motor 32 fixedly installed in the fixing column 31 for driving the turntable 1 to rotate. The motor 32 is connected to the output terminal of the PLC controller.

[0020] In use, first select the appropriate number of fixtures 2 to participate in processing according to the actual processing requirements. If there are any idle fixtures 2 that are not needed, the operator sends a flipping and storage command to the flipping structure 4 of the corresponding idle fixture 2 through the PLC controller. After the command is transmitted to the drive component 43 of the flipping structure 4, the drive component 43 immediately acts and drives the flipping plate 42 to flip in the through slot 41. The flipping plate 42 drives the idle fixtures 2 on it to flip synchronously until the idle fixtures 2 are flipped to the bottom of the turntable 1 for storage. This effectively avoids the idle fixtures 2 interfering with the operation of the processing equipment, the rotation of the turntable 1, and other processing processes in the subsequent processing. It ensures that all fixtures 2 participating in the processing are on the processing surface of the turntable 1. When the idle fixtures 2 are stored... After the workpiece is clamped and positioned by fixture 2, the device starts and enters the multi-station processing stage. The PLC controller, based on the preset processing flow and the workpiece processing status fed back by sensors on the flip plate 42, sends a station repositioning command to the rotating structure 3. Simultaneously, the PLC controller sends a descent command to the protective structure 5. Upon receiving the command, the protective structure 5 immediately descends, creating sufficient rotational space between itself and the turntable 1 to prevent collisions or interference during the turntable 1's rotation, ensuring the turntable 1 can smoothly complete a fixed-angle rotation. Upon receiving the station repositioning command, the rotating structure 3 immediately starts motor 32 and outputs rotational torque, directly driving... The turntable 1, connected to the drive mechanism, rotates precisely at a fixed angle around its central axis. During this rotation, the turntable 1 drives all the fixtures 2 and workpieces on the machining surface to rotate synchronously. This precisely moves the fixtures 2 and workpieces that have completed the current machining operation to the next machining station, and simultaneously rotates the fixtures 2 and workpieces to be machined to the corresponding machining equipment's working position, achieving automatic station repositioning of the fixtures 2 and workpieces. After the turntable 1 completes its fixed-angle rotation and stops at the preset machining station, the PLC controller immediately sends a stop command to the rotating structure 3. The motor 32 stops operating upon receiving the command. At the same time, the PLC controller sends a rise command to the protective structure 5. The protective structure 5 immediately rises upon receiving the command until it reaches the preset protective position. The height provides all-around protection for the fixture 2 at the current processing station, creating an isolation between adjacent fixtures 2. This reduces the splashing of debris from the current processing station onto the workpieces on adjacent fixtures 2, thus minimizing impact on processing quality. After the workpiece at the current processing station completes its corresponding process, the PLC controller repeats the above procedure. First, it sends a descent command to the protective structure 5. After the protective structure 5 descends to avoid the debris, it sends a position change command to the rotating structure 3. Motor 32 drives the turntable 1 to continue rotating at a fixed angle, moving the fixture 2 and workpiece into the next processing station. Once the turntable 1 is in position, motor 32 stops, and the protective structure 5 rises to provide protection. This cycle repeats until all workpieces on all fixtures 2 have completed all processing steps.

[0021] Specifically, the fixture 2 includes a fixed base 21 symmetrically fixedly mounted on the flip plate 42, a fixed clamping block 22 fixedly mounted between the two fixed bases 21, a sliding clamping block 23 slidably connected between the two fixed bases 21 and disposed opposite to the fixed clamping block 22, a connecting base 24 fixedly mounted on the outer side of the two fixed clamping blocks 22 near the sliding clamping block 23, and a servo electric cylinder 25 fixedly mounted on the connecting base 24. The piston rod of the servo electric cylinder 25 is fixedly connected to the side of the sliding clamping block 23 away from the fixed clamping block 22, and the servo electric cylinder 25 is connected to the output terminal of the PLC controller.

[0022] When a workpiece needs to be clamped onto fixture 2, the operator can send a command to servo cylinder 25 via the PLC controller. The piston rod of servo cylinder 25 will push the sliding clamping block 23, which is fixedly connected to it, to slide away from the fixed clamping block 22 along the two fixed seats 21, so that sufficient clamping space is formed between the sliding clamping block 23 and the fixed clamping block 22. At this time, the workpiece to be processed is placed in the clamping area between the fixed clamping block 22 and the sliding clamping block 23. Then, the PLC controller sends a retraction command to servo cylinder 25, and servo cylinder 25 drives its piston rod to retract inward, and the piston rod pulls the sliding clamping block 23. The sliding clamp 23 slides along the fixed base 21 toward the fixed clamp 22 until the sliding clamp 23 and the fixed clamp 22 together clamp the workpiece, completing the clamping and positioning of the workpiece. When the workpiece has completed all the processing steps and needs to be removed from the fixture 2, the PLC controller only needs to send a command to the servo cylinder 25 again. The piston rod of the servo cylinder 25 will pull the sliding clamp 23 to slide away from the fixed clamp 22, increasing the clamping distance and releasing the clamping and fixing of the workpiece. At this time, the processed workpiece can be easily removed from the fixture 2, completing the entire clamping and releasing process.

[0023] Furthermore, the drive assembly 43 includes a connecting shaft 431 that extends laterally through the flip plate 42 and is rotatably connected to the through slot 41, a second motor 432 that is fixedly installed on the outer edge of the turntable 1 to drive the connecting shaft 431 to rotate, and a protective box 433 that covers the outside of the second motor 432 and is fixedly connected to the turntable 1. The second motor 432 is connected to the output terminal of the PLC controller. The PLC controller controls the second motor 432 to rotate, which drives the connecting shaft 431 that extends laterally through the flip plate 42 to rotate synchronously. This drives the flip plate 42 to flip around the connecting shaft 431 in the through slot 41, realizing the flipping and storage of the idle fixture 2. At the same time, the design of the protective box 433 can protect the second motor 432 and prevent processing debris from damaging the second motor 432.

[0024] When the idle fixture 2 needs to be flipped to the bottom of the turntable 1 for storage according to the processing requirements, the PLC controller sends a flipping command to the drive component 43 of the corresponding idle fixture 2. At this time, the corresponding motor 432 immediately starts and outputs torque in the preset rotation direction. The torque of the motor 432 is directly transmitted to the connecting shaft 431 connected to it, causing the connecting shaft 431 to rotate synchronously in the through groove 41. Since the connecting shaft 431 passes through laterally and is fixedly connected to the flipping plate 42, the rotation of the connecting shaft 431 will cause the flipping plate 42 to rotate synchronously in the through groove 41 with the connecting shaft 431 as the axis. The fixture 2 is fixedly installed on the flipping plate 42, so it will move synchronously with the flipping plate 42 until the PLC controller... According to the preset program, the second motor 432 stops rotating. At this time, the flipping plate 42 drives the idle fixture 2 to flip to the bottom position of the turntable 1, completing the storage of the idle fixture 2 and avoiding interference with subsequent processing operations and turntable 1 repositioning. When the subsequent processing steps need to be adjusted and the fixture 2 stored at the bottom of the turntable 1 needs to be reused, the PLC controller will send a reverse flipping command to the corresponding drive component 43. After receiving the command, the second motor 432 rotates in the reverse direction, driving the connecting shaft 431 to rotate in the reverse direction, thereby driving the flipping plate 42 to flip in the reverse direction in the through groove 41 until the fixture 2 returns to the upper surface of the turntable 1 with the flipping plate 42, restoring it to the processing state where it can hold the workpiece, thus meeting the usage requirements of the fixture 2 after the processing steps are adjusted.

[0025] Furthermore, the protective structure 5 includes a concave baffle 51 that runs longitudinally through the turntable 1 and is slidably connected to the outside of the corresponding through groove 41 on the turntable 1, and a lifting assembly 52 disposed outside the fixed column 31 for raising and lowering the concave baffle 51. In addition, the lifting assembly 52 includes a collar 521 sleeved on the outside of the fixed column 31, a connecting frame 522 fixedly installed on the collar 521 and fixedly connected to the corresponding concave baffle 51, a servo electric cylinder 523 fixedly installed on the processing platform or chassis and located below one of the connecting frames 522, and a telescopic rod 524 fixedly installed on the processing platform or chassis and located below the other connecting frame 522. The piston rod of the servo electric cylinder 523 and the telescopic end of the telescopic rod 524 are both fixedly connected to the collar 521. The servo electric cylinder 523 is connected to the output terminal of the PLC controller.

[0026] It is worth noting that, in order to ensure the connection and use of the concave baffle 51, a lifting groove 11 is provided on the turntable 1 at the position corresponding to the concave baffle 51 for the concave baffle 51 to pass through and slide. The design of the lifting groove 11 provides dedicated moving space for the lifting of the concave baffle 51, and at the same time limits the horizontal displacement of the concave baffle 51 to prevent the concave baffle 51 from deviating or getting stuck during the lifting process, ensuring the smoothness and stability of the lifting action of the concave baffle 51, and ensuring that it can form an isolation and protection for the clamp 2 after it is raised.

[0027] When the PLC controller sends a station relocation command to the rotating structure 3 based on the processing status and preset procedures fed back by the sensors, it simultaneously sends a retraction command to the servo cylinder 523. After receiving the command, the servo cylinder 523 drives its piston rod to retract downwards, pulling the collar 521, which is fixedly connected to it, to slide vertically downwards along the fixed column 31. At this time, the telescopic rod 524 extends and retracts synchronously with the descent of the collar 521, providing guidance and auxiliary support for the descent of the collar 521 and preventing the collar 521 from deviating during its descent. As the collar 521 slides down, it moves and shakes, simultaneously driving the concave baffle 51 connected to it to slide vertically downwards along the lifting groove 11 through all the connecting brackets 522, until the top of the concave baffle 51 is completely lowered to the lower surface of the turntable 1, leaving enough space for the rotation of the turntable 1, avoiding collisions or interference between the concave baffle 51 and the turntable 1 or its clamps 2, ensuring that the turntable 1 can smoothly complete the fixed-angle rotation. After the turntable 1 completes the rotation and stops at the preset processing position, the PLC controller immediately sends a signal to the servo motor. Cylinder 2 523 sends an extension command, and servo electric cylinder 2 523 drives its piston rod to extend upward, pushing collar 521 to slide vertically upward along fixed column 31. Telescopic rod 524 extends synchronously with the rise of collar 521, continuing to provide guidance and support for collar 521, ensuring the stability of collar 521's rise. As collar 521 rises, it drives all concave baffles 51 to slide vertically upward along lifting groove 11 through connecting frame 522 until the concave baffles 51 rise to the preset protection height. At this time, each concave baffle 51 is correspondingly wrapped around the outside of a set of fixtures 2. The concave baffles 51 completely isolate two adjacent fixtures 2, forming an independent processing protection space, reducing the splashing of processing debris onto the workpiece surface on adjacent fixtures 2, and ensuring the processing quality of the workpiece. When the workpiece at the current station is completed, when the PLC controller sends a change command again, the protective structure 5 will repeat the above-mentioned descent action to avoid the next change rotation of turntable 1. This cycle is repeated to realize the flexible switching between protection state and change state.

[0028] Example 2 Unlike Example 1, as Figure 7As shown, in order to reduce the damage to the concave baffle 51 caused by the impact of machining chips and the rebound of chips, a rubber pad 511 for buffer protection is fixedly installed on the side of the concave baffle 51 near the through groove 41. By fixing the rubber pad 511 on the side of the concave baffle 51 near the through groove 41, the chips that splash during machining first come into contact with the rubber pad 511. The rubber pad 511 buffers the impact force of the chips through its own elasticity, which not only avoids the direct impact of hard chips causing wear and deformation of the concave baffle 51, but also reduces the chip rebound to the surface of the workpiece and causes scratches, further ensuring the surface quality of the workpiece.

[0029] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A multi-station workpiece clamping and positioning device, comprising a PLC controller, a turntable (1), clamps (2) arranged in a ring on the turntable (1) for clamping and positioning workpieces, and a rotating structure (3) located below the turntable (1) for rotating the clamps (2) on the turntable (1) to change position, characterized in that: The multi-station workpiece clamping and positioning device also includes a flipping structure (4) disposed on the turntable (1) and connected to the corresponding clamp (2) for flipping the clamp (2) to the bottom of the turntable (1). The flipping structure (4) includes a through groove (41) opened on the turntable (1) at the position corresponding to the fixture (2), a flipping plate (42) disposed in the through groove (41), a sensor fixedly installed on the flipping plate (42) for detecting the workpiece processing status, and a drive assembly (43) disposed on the turntable (1) for flipping the flipping plate (42) in the through groove (41). The turntable (1) is provided with a protective structure (5) on the outside of the multiple through slots (41) for protecting each pair of adjacent clamps (2). The sensor is connected to the input terminal of the PLC controller. The protective structure (5), the rotating structure (3) and the drive assembly (43) are all connected to the output terminal of the PLC controller.

2. The multi-station workpiece clamping and positioning device according to claim 1, characterized in that: The clamp (2) includes a fixed seat (21) symmetrically fixedly mounted on the flip plate (42), a fixed clamping block (22) fixedly mounted between the two fixed seats (21), a sliding clamping block (23) slidably connected between the two fixed seats (21) and disposed opposite to the fixed clamping block (22), a connecting seat (24) fixedly mounted on the outer side of one end of the two fixed clamping blocks (22) near the sliding clamping block (23), and a servo electric cylinder (25) fixedly mounted on the connecting seat (24). The piston rod of the servo electric cylinder (25) is fixedly connected to the side of the sliding clamping block (23) away from the fixed clamping block (22). The servo electric cylinder (25) is connected to the output end of the PLC controller.

3. The multi-station workpiece clamping and positioning device according to claim 1, characterized in that: The drive assembly (43) includes a connecting shaft (431) that runs horizontally through the flip plate (42) and is rotatably connected in the through slot (41), a second motor (432) that is fixedly installed at the outer edge of the turntable (1) for driving the connecting shaft (431) to rotate, and a protective box (433) that covers the outside of the second motor (432) and is fixedly connected to the turntable (1). The second motor (432) is connected to the output terminal of the PLC controller.

4. The multi-station workpiece clamping and positioning device according to claim 1, characterized in that: The rotating structure (3) includes a fixed column (31) located below the turntable (1) for fixing to the processing platform or chassis, and a motor (32) fixedly installed in the fixed column (31) for driving the turntable (1) to rotate. The motor (32) is connected to the output terminal of the PLC controller.

5. The multi-station workpiece clamping and positioning device according to claim 4, characterized in that: The protective structure (5) includes a concave baffle (51) that runs longitudinally through the turntable (1) and is slidably connected to the turntable (1) corresponding to the outside of the through groove (41), and a lifting assembly (52) disposed outside the fixed column (31) for raising and lowering the concave baffle (51).

6. The multi-station workpiece clamping and positioning device according to claim 5, characterized in that: The lifting assembly (52) includes a collar (521) sleeved on the outside of the fixed column (31), a connecting frame (522) fixedly installed on the collar (521) and fixedly connected to the corresponding concave baffle (51), a servo electric cylinder two (523) fixedly installed on the processing platform or chassis and located below one of the connecting frames (522), and a telescopic rod (524) fixedly installed on the processing platform or chassis and located below the other connecting frame (522). The piston rod of the servo electric cylinder two (523) and the telescopic end of the telescopic rod (524) are both fixedly connected to the collar (521). The servo electric cylinder two (523) is connected to the output terminal of the PLC controller.

7. The multi-station workpiece clamping and positioning device according to claim 5, characterized in that: The turntable (1) is provided with a lifting groove (11) at the position corresponding to the concave baffle (51) for the concave baffle (51) to pass through and slide.

8. The multi-station workpiece clamping and positioning device according to claim 5, characterized in that: A rubber pad (511) for cushioning and protection is fixedly installed on the side of the concave baffle (51) near the through groove (41).

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