A fixture suitable for use with a workpiece in the form of a body of revolution

Abstract

This invention discloses a clamping fixture suitable for rotating workpieces, including a base, a clamping assembly, and a driving assembly. The clamping assembly includes a clamping bracket, a clamping arm, a clamping rod, and a roller bracket. The clamping bracket is slidably mounted on the base, allowing adjustment of the clamping assembly's position. The clamping arm is mounted on the clamping bracket and connected to the clamping rod. The end of the clamping rod can abut against the rotating workpiece. Two sets of symmetrically arranged clamping rods cooperate to clamp the upper two sides of the rotating workpiece. Two supporting rollers support the lower two sides of the rotating workpiece. Each clamping assembly uses two clamping rods and two rollers to form a four-point surrounding support for the rotating workpiece, ensuring clamping stability. The clamping arm and clamping rod are hinged, accommodating the clamping of rotating workpieces of different specifications. Adjusting the angle between them adjusts the clamping force. The first driving mechanism uses a transmission mechanism to drive the two sets of clamping assemblies to move, adjusting the clamping length to meet clamping requirements and save production costs.

Description

Technical Field

[0001] This invention relates to the technical field of waterjet cutting production equipment and its peripheral supporting facilities, and in particular to a clamp suitable for rotating workpieces. Background Technology

[0002] The solid rocket motor casing bears the axial load of the rocket, ensuring that the fuel-carrying compartment is not damaged by axial pressure during missile storage and operation, thus guaranteeing the stability of the missile structure. To ensure the stability of the missile structure, compression experiments are conducted on different experimental models, and the models after compression failure are subjected to cross-sectional cutting studies. Furthermore, the failure locations differ among the different models, requiring different cutting areas and sizes.

[0003] Currently, there are no jigs specifically designed for cutting such rotating bodies on the market. A suitable jig needs to be adaptable to different sizes of rotating bodies, allowing for adjustment of the model's position during cutting. Traditional jigs lack mechanisms to automatically adapt to the diameter and length of the rotating body; a different jig is required for each new model, which is wasteful. Traditional jigs cannot customize the clamping force based on the strength of the composite material, and cannot guarantee that the material will not be damaged while being clamped. Furthermore, traditional jigs cannot change the model's position during cutting, thus making it impossible to customize the cutting range and size. Summary of the Invention

[0004] The purpose of this invention is to provide a fixture suitable for rotating workpieces, so as to solve the problems existing in the above-mentioned related technologies, realize the clamping of different rotating workpieces, and adjust the clamping force, improve the flexibility and adaptability of the fixture, save the clamping cost of rotating workpieces, and provide convenience for subsequent production processes.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a fixture suitable for rotating workpieces, comprising:

[0007] Base;

[0008] A clamping assembly includes a clamping bracket, clamping arms, clamping rods, and roller brackets. The clamping bracket is slidably mounted on the base. The clamping arms are mounted on the clamping bracket, and a clamping rod is hinged to one end of the clamping arm away from the clamping bracket. The angle between the clamping arm and the clamping rod is fixed. The end of the clamping rod away from the clamping arm can abut against a rotating workpiece. There are two sets of clamping arms, symmetrically arranged about the sliding axis of the clamping bracket. The roller bracket includes a connecting frame and a support roller rotatably mounted on the connecting frame. The support roller can abut against the rotating workpiece. The connecting frame is connected to the clamping bracket, and their connection position is adjustable. There are two sets of roller brackets, located between the two clamping arms.

[0009] The number of clamping components is two sets, and the two clamping components are arranged in a direction parallel to the sliding axis of the clamping bracket;

[0010] The driving component includes a first driver and a transmission mechanism. The first driver is disposed on the base and is connected to the two clamping components by means of the transmission mechanism, so as to drive the two clamping components to move simultaneously, and the two clamping components move in opposite directions.

[0011] Preferably, a clamping rod is provided between the clamping arm and the clamping rod. The length of the clamping rod is adjustable. One end of the clamping rod is hinged to the clamping arm, and the other end of the clamping rod is hinged to one end of the clamping rod. The clamping rod is L-shaped, and the middle part of the clamping rod is hinged to the clamping arm. The other end of the clamping rod can abut against the rotating workpiece.

[0012] Preferably, the clamping rod is a hydraulic cylinder, the fixed end of the hydraulic cylinder is hinged to the clamping arm, and the movable end of the hydraulic cylinder is hinged to the clamping rod.

[0013] Preferably, the clamping arm has a mounting groove, and the clamping rod and the clamping bar both extend into the mounting groove. The clamping rod, the clamping bar, and the clamping arm are all hinged by a pin.

[0014] Preferably, the connecting frame is sleeved on the clamping bracket and tightened by fastening bolts.

[0015] Preferably, the clamping assembly further includes a clamping head, which is rotatably connected to the clamping arm and the two correspond one-to-one, and the outer peripheral surface of the clamping head abuts against the rotating workpiece.

[0016] Preferably, in the clamping assembly, one of the clamping heads is connected to a second driver, the second driver is disposed on the clamping arm, the output end of the second driver is connected to the clamping head for transmission, and the second driver can drive the clamping head to rotate;

[0017] The clamping head is detachably connected to the clamping arm.

[0018] Preferably, the transmission mechanism includes a transmission screw and a screw head. The transmission screw is rotatably mounted on the base, and the output end of the first driver is connected to the transmission screw. The screw head is threadedly connected to the transmission screw and connected to the clamping bracket. The number of transmission mechanisms is two sets, each corresponding to one of the clamping components.

[0019] Preferably, the output end of the first driver is connected to a motor gear, the lead screw head of both transmission mechanisms is connected to a transmission gear, the two transmission gears are symmetrically arranged about the axis of rotation of the motor gear, and both transmission gears mesh with the motor gear. Both the transmission gear and the motor gear are bevel gears.

[0020] Preferably, the clamping bracket has a sliding groove, the base has a slide rail adapted to the sliding groove, the clamping bracket is slidably disposed on the slide rail, and the length direction of the slide rail is parallel to the axial direction of the transmission screw.

[0021] Compared with related technologies, the present invention achieves the following technical effects: The clamping device of the present invention, applicable to rotating workpieces, includes a base, a clamping assembly, and a driving assembly. The clamping assembly includes a clamping bracket, a clamping arm, a clamping rod, and a roller bracket. The clamping bracket is slidably mounted on the base, and the clamping arm is mounted on the clamping bracket. A clamping rod is hinged to the end of the clamping arm away from the clamping bracket. The angle between the clamping arm and the clamping rod can be fixed, and the end of the clamping rod away from the clamping arm can abut against the rotating workpiece. There are two sets of clamping arms, symmetrically arranged about the sliding axis of the clamping bracket. The roller bracket... The system includes a connecting frame and support rollers rotatably mounted on the connecting frame. The support rollers can abut against the rotating workpiece. The connecting frame is connected to the clamping bracket, and the connection position between the two can be adjusted. There are two sets of roller brackets, located between two clamping arms. There are two sets of clamping components, arranged in a direction parallel to the sliding axis of the clamping bracket. The driving component includes a first driver and a transmission mechanism. The first driver is mounted on the base and is connected to the two clamping components via the transmission mechanism to drive the two clamping components to move simultaneously, with the two clamping components moving in opposite directions.

[0022] The present invention relates to a clamping device suitable for rotating workpieces. A clamping bracket is slidably mounted on a base, allowing adjustment of the clamping assembly position for convenient clamping of the rotating workpiece at different locations. Clamping arms are mounted on the clamping bracket and connected to clamping rods. The ends of the clamping rods abut against the rotating workpiece. Two sets of symmetrically arranged clamping rods cooperate to clamp the upper two sides of the rotating workpiece. Simultaneously, the clamping assembly also includes a roller bracket located below the clamping rods. Two supporting rollers support the lower two sides of the rotating workpiece. Each clamping assembly utilizes two clamping rods and two rollers to form a four-point surrounding support for the rotating workpiece, ensuring clamping stability. The two sets of clamping assemblies are arranged along the axial direction of the rotating workpiece, facilitating adjustment of the clamping position and length, further improving clamping reliability. The clamping assembly of this invention features a clamping arm and a clamping rod hinged together, adaptable to clamping rotating workpieces of different specifications. Adjusting the angle between them allows for adjustment of the clamping force, satisfying the clamping requirements of rotating workpieces made of different materials and improving the adaptability of the fixture. Furthermore, the support roller is rotatably located at the bottom of the rotating workpiece, facilitating adjustment of the workpiece's angle. The driving assembly of this invention includes a first driver that uses a transmission mechanism to drive the movement of two sets of clamping assemblies, adjusting the clamping length to meet clamping requirements and saving fixture energy and production costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an isometric schematic diagram of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0025] Figure 2 This is a front view schematic diagram of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0026] Figure 3 This is a top view schematic diagram of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0027] Figure 4 This is a side view schematic diagram of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the fixture for rotating workpieces as disclosed in the embodiments of the present invention during operation;

[0029] Figure 6This is a schematic diagram of the clamping bracket of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the roller support structure of a clamping device for a rotating workpiece disclosed in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the clamping arm of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the clamping rod of a fixture suitable for rotating workpieces disclosed in an embodiment of the present invention.

[0033] In the diagram: 100, a fixture suitable for workpieces of rotation;

[0034] 1. Base; 2. Clamping assembly; 3. Drive assembly; 4. Clamping bracket; 5. Clamping arm; 6. Clamping rod; 7. Roller bracket; 8. Support roller; 9. First driver; 10. Clamping rod; 11. Clamping head; 12. Transmission screw; 13. Screw head; 14. Motor gear; 15. Transmission gear; 16. Slide groove; 17. Slide rail; 18. Rotating workpiece; 19. Connecting frame. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The purpose of this invention is to provide a fixture suitable for rotating workpieces to solve the problems existing in the above-mentioned related technologies, realize the clamping of different rotating workpieces, adjust the clamping force, improve the flexibility and adaptability of the fixture and the clamping safety factor, save the clamping cost of rotating workpieces, and provide convenience for subsequent production processes.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] This embodiment provides a fixture 100 suitable for rotating workpieces. Please refer to [reference needed]. Figures 1-9The system includes a base 1, a clamping assembly 2, and a drive assembly 3. The clamping assembly 2 includes a clamping bracket 4, a clamping arm 5, a clamping rod 6, and a roller bracket 7. The clamping bracket 4 is slidably mounted on the base 1. The clamping arm 5 is mounted on the clamping bracket 4. The clamping rod 6 is hinged to the end of the clamping arm 5 away from the clamping bracket 4. The angle between the clamping arm 5 and the clamping rod 6 can be fixed. The end of the clamping rod 6 away from the clamping arm 5 can abut against the rotating workpiece 18. There are two sets of clamping arms 5, which are symmetrically arranged about the sliding axis of the clamping bracket 4. The roller bracket 7 includes a connecting frame 19 and a roller bracket rotatably mounted on the connecting frame 19. The support roller 8 on the upper part can abut against the rotating workpiece 18. The connecting frame 19 is connected to the clamping bracket 4, and the connection position of the two can be adjusted. There are two sets of roller brackets 7, which are located between the two clamping arms 5. There are two sets of clamping components 2, which are arranged in a direction parallel to the sliding axis of the clamping bracket 4. The driving component 3 includes a first driver 9 and a transmission mechanism. The first driver 9 is set on the base 1. The first driver 9 is connected to the two clamping components 2 by the transmission mechanism to drive the two clamping components 2 to move at the same time, and the movement directions of the two clamping components 2 are opposite.

[0040] The present invention provides a clamp 100 suitable for rotating workpieces. A clamping bracket 4 is slidably mounted on a base 1, allowing adjustment of the position of the clamping assembly 2 to facilitate clamping the rotating workpiece 18 at different positions. A clamping arm 5 is mounted on the clamping bracket 4 and connected to a clamping rod 6. The end of the clamping rod 6 abuts against the rotating workpiece 18. Two symmetrically arranged clamping rods 6 cooperate to clamp the upper sides of the rotating workpiece 18. Simultaneously, the clamping assembly 2 also includes a roller bracket 7 located below the clamping rods 6. Two supporting rollers 8 support the lower sides of the rotating workpiece. Each clamping assembly 2 utilizes the two clamping rods 6 and two rollers to form a four-point surrounding support for the rotating workpiece 18, ensuring clamping stability. The two clamping assemblies 2 are arranged along the axial direction of the rotating workpiece 18, facilitating adjustment of the clamping position and clamping length, further improving clamping reliability. The clamping assembly 2 of this invention has a clamping arm 5 hinged to a clamping rod 6, which can adapt to clamping rotating workpieces 18 of different specifications. Adjusting the angle between the two can adjust the clamping force to meet the clamping requirements of rotating workpieces 18 made of different materials, thus improving the adaptability of the fixture. Furthermore, the support roller 8 is rotatably located at the bottom of the rotating workpiece 18, facilitating the adjustment of the angle of the rotating workpiece 18. The driving assembly 3 of this invention has a first driver 9 that uses a transmission mechanism to drive the two sets of clamping assemblies 2 to move, adjusting the clamping length to meet clamping requirements and saving fixture energy consumption and production costs.

[0041] It should be explained here that the two clamping rods 6 cooperate to clamp the upper two sides of the rotating workpiece 18, and the two supporting rollers 8 support the lower two sides of the rotating workpiece. Here, "upper part" and "lower part" refer to the top and bottom of the axis of the rotating workpiece 18, while "two sides" refer to the two sides of the rotating workpiece 18 in the horizontal direction, thus forming a ring-shaped clamping of the rotating workpiece 18 and enhancing the clamping stability.

[0042] Specifically, a clamping rod 10 is provided between the clamping arm 5 and the clamping rod 6. The length of the clamping rod 10 is adjustable. One end of the clamping rod 10 is hinged to the clamping arm 5, and the other end of the clamping rod 10 is hinged to one end of the clamping rod 6. Adjusting the length of the clamping rod 10 can adjust the angle between the clamping arm 5 and the clamping rod 6 to meet the clamping requirements of different rotating workpieces 18 and different clamping forces. In this specific embodiment, the clamping rod 6 is L-shaped. The middle part of the clamping rod 6 is hinged to the clamping arm 5, and the other end of the clamping rod 6 can abut against the rotating workpiece 18. This facilitates the connection of the clamping rod 10 while ensuring that the clamping rod 6 can clamp and fix the rotating workpiece 18.

[0043] In this specific embodiment, the end of the clamping rod 6 that abuts against the rotating workpiece 18 is inclined towards the axis of the rotating workpiece 18. That is, in each clamping assembly 2, the clamping rod 6 is inclined towards the other clamping rod 6, further improving clamping reliability. In practical applications, the end of the clamping rod 6 that contacts the rotating workpiece 18 can be set as an arc-shaped rod, and the two symmetrical clamping rods 6 form an arc-shaped structure, further adapting to the clamping of the rotating workpiece 18 and further improving the adaptability of the clamping assembly 2.

[0044] It should also be noted that the clamping rod 10 is a hydraulic cylinder. The fixed end of the hydraulic cylinder is hinged to the clamping arm 5, and the movable end of the hydraulic cylinder is hinged to the clamping rod 6. The hydraulic cylinder can precisely control the extension length of the movable end, thereby adjusting the angle between the clamping arm 5 and the clamping rod 6 by extending and retracting the hydraulic cylinder to meet the clamping requirements of different rotating workpieces 18, adjust the clamping force, and improve the clamping reliability while increasing the clamping safety factor.

[0045] In this specific embodiment, the clamping arm 5 has a mounting groove, and both the clamping rod 6 and the clamping rod 10 extend into the mounting groove. The clamping rod 6, the clamping rod 10, and the clamping arm 5 are all hinged using pins. The mounting groove in the clamping arm 5 provides stable support for the clamping rod 6 and the clamping rod 10, and also provides a limit for the clamping rod 6 and the clamping rod 10, preventing them from shaking or misaligning, thus further improving the structural stability of the fixture. The clamping rod 6, the clamping rod 10, and the clamping arm 5 are all hinged using pins. The type and specifications of the pins can be selected and adjusted according to specific working conditions to meet the hinge requirements and ensure the structural strength of the clamping assembly 2.

[0046] More specifically, the connecting frame 19 has a rectangular frame structure, the width of which is greater than the width of the clamping arm 5. The connecting frame 19 is fitted onto the clamping bracket 4 using the rectangular frame structure and can slide along the clamping bracket 4. Tightening with fastening bolts fixes the position between the connecting frame 19 and the clamping bracket 4, ensuring the stability of their connection. Simultaneously, loosening the fastening bolts adjusts the position of the connecting frame 19, thereby adjusting the position of the support roller 8 to accommodate the support and clamping of rotating workpieces 18 of different specifications. The connecting frame 19 is connected to the clamping bracket 4 using fastening bolts, ensuring a stable connection and convenient adjustment. To ensure the accuracy of the reciprocating sliding of the connecting frame 19 along the clamping bracket 4, a protrusion is provided within the rectangular frame structure of the connecting frame 19. The clamping bracket 4 has a strip-shaped recess that matches the protrusion. The protrusion slides back and forth within the strip-shaped recess, ensuring the accuracy of the connecting frame 19's position adjustment.

[0047] It should also be emphasized that the clamping assembly 2 includes a clamping head 11, which is rotatably connected to the clamping arm 5 and the two correspond one-to-one. The outer circumferential surface of the clamping head 11 abuts against the rotating workpiece 18, which not only stably clamps the rotating workpiece 18, but also further improves the convenience of adjusting the position of the rotating workpiece 18. The present invention uses the clamping head 11 and the support roller 8 to perform a circumferential clamping and fixing of the rotating workpiece 18. Both the clamping head 11 and the support roller 8 can rotate, so even after the rotating workpiece 18 is clamped, the angle of the rotating workpiece 18 can still be easily adjusted, which provides convenience for subsequent cutting production and is conducive to realizing the customization of the cross-section of the rotating workpiece 18.

[0048] In other specific embodiments of the present invention, in the clamping assembly 2, one clamping head 11 is connected to a second driver, which is disposed on the clamping arm 5. The output end of the second driver is connected to the clamping head 11 for transmission, and the second driver can drive the clamping head 11 to rotate. The second driver drives one of the clamping heads 11 to rotate, and the friction between the clamping head 11 and the rotating workpiece 18 is used to drive the rotating workpiece 18 to rotate, thereby adjusting the angle of the rotating workpiece 18. In order to increase the friction between the clamping head 11 and the rotating workpiece 18, anti-slip textures can be provided on the outside of the clamping head 11.

[0049] In practical applications, the clamping head 11 and the clamping arm 5 can be detachably connected, facilitating the replacement of the clamping head 11 to meet different clamping needs and further improve the flexibility and adaptability of the fixture. The clamping head 11 can be configured as a double-wheel structure or a grooved wheel structure, etc. A protective layer can also be provided on the outside of the clamping head 11 to protect the rotating workpiece 18 while clamping, further enhancing the clamping safety of the fixture.

[0050] Furthermore, the transmission mechanism includes a transmission screw 12 and a screw head 13. The transmission screw 12 is rotatably mounted on the base 1, and the output end of the first driver 9 is connected to the transmission screw 12. The screw head 13 is threadedly connected to the transmission screw 12 and is connected to the clamping bracket 4. There are two sets of transmission mechanisms, each corresponding to one of the clamping components 2. The first driver 9 can drive the two transmission screws 12 to rotate, and the screw head 13 is driven to slide back and forth along the transmission screw 12. The rotation directions of the two transmission screws 12 are opposite, thereby achieving the purpose of simultaneously driving the two clamping brackets 4 to move using the first driver 9. The two clamping brackets 4 move in opposite directions, moving towards and away from each other, improving the adjustment efficiency and adjusting the distance between the two clamping brackets 4, thereby adjusting the clamping distance of the two clamping components 2.

[0051] In this specific embodiment, the output end of the first driver 9 is connected to a motor gear 14, and the lead screw heads 13 of both transmission mechanisms are connected to transmission gears 15. The two transmission gears 15 are symmetrically arranged about the rotation axis of the motor gear 14, and both transmission gears 15 mesh with the motor gear 14. Both transmission gears 15 and motor gears 14 are bevel gears. The gear transmission structure achieves smooth power transmission, is compact, and has high transmission efficiency. In other specific embodiments of the present invention, other transmission structures, such as belt drives and chain drives, can be selected to meet different working conditions and improve the flexibility and adaptability of the fixture.

[0052] To further improve the reciprocating sliding accuracy of the clamping bracket 4, the clamping bracket 4 has a groove 16, and the base 1 has a slide rail 17 adapted to the groove 16. The clamping bracket 4 is slidably mounted on the slide rail 17, and the length direction of the slide rail 17 is parallel to the axis of the transmission screw 12, thus improving the reciprocating sliding accuracy of the clamping assembly 2. In this specific embodiment, the groove 16 is a dovetail groove, and the cross-sectional shape of the slide rail 17 is adapted to the groove 16. While improving the reciprocating motion accuracy of the clamping bracket 4, this effectively prevents the clamping bracket 4 from slipping, improves the working reliability of the fixture, and further enhances the clamping safety of the fixture. In practical applications, the specific shapes of the groove 16 and the slide rail 17 can be adjusted to meet different working conditions and reduce the difficulty of fixture processing.

[0053] Example 2

[0054] This embodiment provides a cutting processing system, including a cutting device and a fixture 100 suitable for rotating workpieces as described in Embodiment 1. Using the fixture 100, the rotating workpiece 18 is clamped, fixed, and its angle adjusted, facilitating the cutting device's machining process and thus solving the problem of customized profiles. Water-based cutting equipment can be selected as the cutting device.

[0055] The clamp 100 of this invention, applicable to rotating workpieces, uses a hydraulic cylinder to drive the clamping assembly 2 for clamping, and a transmission screw 12 to drive the clamping bracket 4 to slide and adjust the clamping length, effectively improving the adaptive adjustment speed for rotating structures of different sizes and rotating workpieces 18 requiring different clamping forces. The motor gear 14 drives two symmetrically distributed transmission gears 15 to rotate synchronously. The symmetrical distribution of the transmission gears 15 ensures the synchronous rotation of the two transmission screws 12, accelerating the clamping length adjustment speed while ensuring dimensional accuracy. The clamping arm 5 can preset the hydraulic force to achieve appropriate clamping force for different materials, avoiding secondary damage to the rotating workpiece 18. The clamping head 11 allows for angle adjustment of the rotating workpiece 18 after clamping, thereby achieving customized cross-sections. The freely adjustable roller bracket 7 of this invention can conveniently adjust the support part according to the diameter of the clamped workpiece and can customize the positioning of eccentric rotating parts, realizing a more flexible clamping method.

[0056] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A fixture suitable for rotating workpieces, characterized in that, include: Base; A clamping assembly includes a clamping bracket, clamping arms, clamping rods, and roller brackets. The clamping bracket is slidably mounted on the base. The clamping arms are mounted on the clamping bracket, and a clamping rod is hinged to one end of the clamping arm away from the clamping bracket. The angle between the clamping arm and the clamping rod is fixed. The end of the clamping rod away from the clamping arm can abut against a rotating workpiece. There are two sets of clamping arms, symmetrically arranged about the sliding axis of the clamping bracket. The roller bracket includes a connecting frame and a support roller rotatably mounted on the connecting frame. The support roller can abut against the rotating workpiece. The connecting frame is connected to the clamping bracket, and their connection position is adjustable. There are two sets of roller brackets, located between the two clamping arms. The number of clamping components is two sets, and the two clamping components are arranged in a direction parallel to the sliding axis of the clamping bracket; The driving component includes a first driver and a transmission mechanism. The first driver is disposed on the base and is connected to the two clamping components by means of the transmission mechanism, so as to drive the two clamping components to move simultaneously, and the two clamping components move in opposite directions.

2. The fixture for rotating workpieces according to claim 1, characterized in that: A clamping rod is provided between the clamping arm and the clamping rod. The length of the clamping rod is adjustable. One end of the clamping rod is hinged to the clamping arm, and the other end of the clamping rod is hinged to one end of the clamping rod. The clamping rod is L-shaped, and the middle part of the clamping rod is hinged to the clamping arm. The other end of the clamping rod can abut against the rotating workpiece.

3. The fixture for rotating workpieces according to claim 2, characterized in that: The clamping rod is a hydraulic cylinder, with the fixed end of the hydraulic cylinder hinged to the clamping arm and the movable end of the hydraulic cylinder hinged to the clamping rod.

4. The fixture for rotating workpieces according to claim 2, characterized in that: The clamping arm has a mounting groove, and the clamping rod and the clamping bar both extend into the mounting groove. The clamping rod, the clamping bar, and the clamping arm are all hinged by a pin.

5. The fixture for rotating workpieces according to claim 1, characterized in that: The connecting frame is sleeved on the clamping bracket and tightened by fastening bolts.

6. The fixture for a workpiece of rotation according to any one of claims 1-5, characterized in that: The clamping assembly further includes a clamping head, which is rotatably connected to the clamping arm and the two correspond one-to-one. The outer peripheral surface of the clamping head abuts against the rotating workpiece.

7. The fixture for a workpiece of rotation according to claim 6, characterized in that: In the clamping assembly, one of the clamping heads is connected to a second driver, the second driver is disposed on the clamping arm, the output end of the second driver is connected to the clamping head for transmission, and the second driver can drive the clamping head to rotate; The clamping head is detachably connected to the clamping arm.

8. The fixture for a workpiece of rotation according to any one of claims 1-5, characterized in that: The transmission mechanism includes a transmission screw and a screw head. The transmission screw is rotatably mounted on the base, and the output end of the first driver is connected to the transmission screw. The screw head is threadedly connected to the transmission screw and connected to the clamping bracket. There are two sets of transmission mechanisms, each corresponding to one of the clamping components.

9. The fixture for a workpiece of rotation according to claim 8, characterized in that: The output end of the first driver is connected to a motor gear, and the lead screw heads of both transmission mechanisms are connected to transmission gears. The two transmission gears are symmetrically arranged with the rotation axis of the motor gear as the axis of symmetry, and both transmission gears mesh with the motor gear. Both the transmission gears and the motor gear are bevel gears.

10. The fixture for rotating workpieces according to claim 8, characterized in that: The clamping bracket has a sliding groove, and the base has a slide rail adapted to the sliding groove. The clamping bracket is slidably disposed on the slide rail, and the length direction of the slide rail is parallel to the axial direction of the transmission screw.

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