Annular part clamping device and clamping method

Abstract

The invention belongs to the technical field of clamping devices, and discloses an annular part clamping device and a clamping method. The annular part clamping device comprises a bearing platform, rolling wheels and a fixing assembly. The annular part is clamped from the peripheral side through the rolling wheels, the clamping force formed by gathering the multiple rolling wheels is more uniform and is mainly used for driving the annular part to rotate and preliminarily position, the fixing assembly only fixes the relative position, and extra external force such as axial pressure of the pressing plate or radial supporting force of the inner hole supporting tool is not applied to the annular part; and deformation of the annular part caused by stress is reduced, so that the influence of elastic recovery deformation on dimensional tolerance after dismounting and clamping is reduced, and the product quality is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of clamping devices, and in particular to a ring-shaped part clamping device and a clamping method. Background Art

[0002] In the field of mechanical processing, it is common to process annular parts that have large outer diameters, narrow rings, and thin thicknesses. Some parts also have high mass. During the machining of these parts, clamping is a key step in ensuring machining accuracy. Appropriate clamping methods are required to stabilize the parts and meet the requirements of subsequent cutting and other processing steps.

[0003] In the prior art, there are two main methods for clamping the above-mentioned annular parts: one is to place the parts directly on the machine tool workbench or tooling platform, apply pressure to the upper end surface of the parts through a pressure plate and screws, and use pressure to press and fix the parts; the other is to use a method of supporting the inner hole or blocking the outer cylindrical surface, that is, to apply an outward supporting force to the inner hole of the part through an inner hole support, or to use an outer cylindrical block to form a block against the outer cylindrical surface of the part, thereby realizing the positioning and fixation of the parts.

[0004] However, using a clamping screw or internal hole tensioning will apply additional external force to the part, causing it to deform during machining. Once the clamp is removed, the external force disappears, and the part will deform due to elastic recovery. When using an external cylindrical retainer, the impact force generated by the high-speed rotation of the milling cutter can easily cause the part to shift relative to the retainer. Both of these clamping methods ultimately result in the finished part not meeting the required dimensional tolerances, impacting product quality.

[0005] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0006] The object of the present invention is to provide a clamping device and a clamping method for an annular part, so as to reduce the influence of elastic recovery deformation on dimensional tolerance after removal of the clamping, thereby ensuring product quality.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A ring-shaped parts clamping device, comprising:

[0009] The bearing platform is used to bear the annular part and slide with the annular part;

[0010] A plurality of rollers are provided around the circumference of the carrying platform, and the plurality of rollers can converge toward the center to clamp the annular part, or separate outward to release the annular part;

[0011] At least one of the rollers is a driving wheel, and the other rollers are driven wheels, so that the driving wheel drives the annular part to rotate around its own axis on the carrying platform;

[0012] The fixing assembly is configured to fix the relative positions of the carrying platform and the annular part.

[0013] Preferably, the supporting platform supports the annular parts through multiple universal ball transfers, and the multiple universal ball transfers are arranged on the supporting surface of the supporting platform and divided into multiple areas. The multiple areas are evenly distributed along the circumference of the supporting platform, and the universal ball transfers in each area are evenly distributed.

[0014] Preferably, a lifting assembly is provided on the carrying platform, and the lifting assembly can drive the universal ball transfer units in multiple areas to move up and down so as to lift or lower the annular parts.

[0015] Preferably, the lifting assembly includes lifting members arranged in one-to-one correspondence with multiple areas, and each of the multiple lifting members is configured to drive the universal ball transfer unit in the corresponding area to move up and down.

[0016] Preferably, the fixing assembly includes:

[0017] A first positioning groove is provided on the lower end surface of the annular part;

[0018] A second positioning groove is provided on the bearing surface of the bearing platform and can correspond to the position of the first positioning groove;

[0019] The connecting piece can be inserted into the first positioning groove and the second positioning groove at the same time to fix the relative position of the annular part and the carrying platform.

[0020] Preferably, the annular part clamping device further comprises a telescopic mechanism for driving the roller to move, and a plurality of the telescopic mechanisms are provided corresponding to the number of the rollers.

[0021] Preferably, the telescopic mechanism includes a servo electric cylinder and a telescopic rod, the servo electric cylinder is used to drive the telescopic rod to extend and retract along the radial direction of the annular part, and the roller is transmission-connected to the telescopic rod.

[0022] Preferably, the annular part clamping device further comprises a control component for synchronously controlling the plurality of servo electric cylinders so as to enable the plurality of telescopic rods to extend and retract synchronously.

[0023] Preferably, the outer periphery of the roller is coated with an elastic layer, so that the friction force is increased by the elastic deformation of the elastic layer when the roller abuts against the annular part.

[0024] A clamping method based on the above-mentioned annular part clamping device, the clamping method comprising the following steps:

[0025] placing the annular part on the carrying platform;

[0026] driving the plurality of rollers to converge toward the center to clamp the outer periphery of the annular part;

[0027] The annular part is driven to rotate around its own axis on the carrying platform by the driving wheel;

[0028] The relative positions of the carrying platform and the annular part are fixed by the fixing assembly;

[0029] After the processing is completed, the plurality of rollers are driven to separate outward synchronously to release the annular parts.

[0030] Beneficial effects of the present invention:

[0031] 1. The present invention clamps the annular part from the outer peripheral side by rollers. The clamping force formed by multiple rollers gathered together is more uniform and is mainly used to drive the annular part to rotate and initially position. The fixing assembly only fixes the relative position and does not apply additional external forces such as the axial pressure of the pressure plate or the radial tightening force of the inner hole support to the annular part, thereby reducing the deformation of the annular part caused by the force, thereby reducing the influence of the elastic recovery deformation after removal and clamping on the dimensional tolerance, thereby ensuring product quality.

[0032] 2. The present invention uses multiple rollers to gather and clamp the annular parts. Compared with the abutment of a single or a few external cylindrical stops, the multiple rollers distributed circumferentially can provide clamping force from multiple directions. Combined with the fixing assembly to fix the relative position of the annular parts and the supporting platform, the stability of the annular parts during the processing can be enhanced, and the displacement of the annular parts caused by the impact force generated by the high-speed rotation of the milling cutter can be reduced, which is conducive to ensuring the processing size tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the annular parts clamping device provided by the present invention;

[0034] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0035] In the picture:

[0036] 100. Ring parts;

[0037] 1. Carrying platform; 2. Roller; 3. Fixing assembly; 31. Connector; 4. Universal ball; 5. Telescopic mechanism; 51. Servo electric cylinder; 52. Telescopic rod. DETAILED DESCRIPTION

[0038] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0039] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0040] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent three situations: the existence of a centrifugal vortex magnetic pump alone, the existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump at the same time, and the existence of a centrifugal vortex magnetic pump alone. In addition, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0041] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0042] Throughout this application, those skilled in the art will understand that relative terms (e.g., "about," "approximately," "substantially," etc.) used in connection with quantities or conditions are inclusive of the stated value and have the meaning dictated by the context. For example, such relative terms encompass at least the degree of error associated with the measurement of the specified value, as well as tolerances associated with the specified value resulting from manufacturing, assembly, and usage. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a percentage (e.g., 1%, 5%, 10%, or more) of the stated value. Even values ​​not using relative terms should be disclosed as being within the specified value with the tolerance. Furthermore, "substantially," when used to express a relative angular positional relationship (e.g., "substantially parallel," "substantially perpendicular," etc.), may refer to a value that is plus or minus a specified number of degrees (e.g., 1 degree, 5 degrees, 10 degrees, or more) relative to the stated angle.

[0043] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0045] See also Figure 1 and Figure 2 This embodiment provides a ring-shaped part clamping device, which includes a carrying platform 1, rollers 2 and a fixing assembly 3. The carrying platform 1 is used to carry the ring-shaped part 100 and slide with the ring-shaped part 100. A plurality of rollers 2 are arranged around the circumference of the carrying platform 1, and the plurality of rollers 2 can gather toward the center to clamp the ring-shaped part 100, or separate outward to release the ring-shaped part 100. Among them, at least one roller 2 is a driving wheel, and the remaining rollers 2 are driven wheels, so that the driving wheel drives the ring-shaped part 100 to rotate around its own axis on the carrying platform 1. The fixing assembly 3 is configured to fix the relative position of the carrying platform 1 and the ring-shaped part 100.

[0046] It can be understood that the annular part 100 is clamped from the outer peripheral side by the roller 2, and the clamping force formed by the gathering of multiple rollers 2 is more uniform, and is mainly used to drive the annular part 100 to rotate and initially position. The fixing component 3 only fixes the relative position and does not apply additional external force such as the axial pressure of the pressure plate or the radial tightening force of the inner hole support to the annular part 100, thereby reducing the deformation of the annular part 100 caused by the force, thereby reducing the influence of the elastic recovery deformation after removal of the clamping on the dimensional tolerance, thereby ensuring product quality.

[0047] It can also be understood that by gathering and clamping the annular part 100 with multiple rollers 2, compared with the abutment of a single or a few external cylindrical stops, the multiple rollers 2 distributed circumferentially can provide clamping force from multiple directions. Combined with the fixing component 3 to fix the relative position of the annular part 100 and the supporting platform 1, the stability of the annular part 100 during the processing process can be enhanced, and the displacement of the annular part 100 caused by the impact force generated by the high-speed rotation of the milling cutter can be reduced, which is conducive to ensuring the processing size tolerance.

[0048] It should be pointed out that the driving wheel serves as the power source for driving the annular part 100 to rotate, and its structure should include a power transmission component, such as a transmission shaft connected to the driving motor, a bearing for stable rotation, and a wheel body in contact with the outer periphery of the annular part 100, so as to transmit power through active rotation and drive the annular part 100 to rotate around its own axis. The core difference between the driven wheel and the driving wheel is that the driven wheel has no power input structure and only includes a wheel body and a basic support component, and the wheel body can rotate freely. It does not actively provide power, but only passively rotates with the rotation of the annular part 100, mainly cooperating with the driving wheel to form a uniform clamping force from the circumference, assisting in positioning, and does not participate in power transmission. It only plays the role of auxiliary clamping and reducing frictional resistance. In this embodiment, the rollers 2 are all driving wheels, and there are four of them, and the four rollers 2 are evenly distributed on the circumferential side of the carrying platform 1.

[0049] Correspondingly, this embodiment also provides a clamping method based on the above-mentioned annular part clamping device, and the clamping method includes the following steps:

[0050] Place the annular component 100 on the carrying platform 1;

[0051] Driving the plurality of rollers 2 to converge toward the center to clamp the outer periphery of the annular component 100;

[0052] The annular component 100 is driven by the driving wheel to rotate around its own axis on the carrying platform 1;

[0053] The relative positions of the carrying platform 1 and the annular component 100 are fixed by the fixing assembly 3;

[0054] After the processing is completed, the multiple rollers 2 are driven to separate outward synchronously to release the annular part 100.

[0055] First, the annular part 100 is placed on the supporting platform 1 and forms a sliding fit. In this step, support is only provided by the supporting platform 1 without applying any clamping force, thus avoiding deformation caused by external force in the initial clamping stage.

[0056] Subsequently, multiple rollers 2 gather toward the center to clamp the outer periphery of the annular part 100, which can ensure that the clamping force is distributed circumferentially. The purpose of clamping is to provide friction for the subsequent rotation of the annular part 100, rather than fixing it through strong clamping force, thereby reducing the deformation of the annular part 100 caused by local excessive external force.

[0057] Subsequently, when the annular component 100 is driven to rotate by the driving wheel, the annular component 100 slides on the carrying platform 1. At this time, there is no additional fixing force constraint, thus avoiding force deformation caused by fixation during the rotation process.

[0058] Finally, the relative position is fixed by the fixing component 3, and only the position required for processing is locked instead of applying additional clamping force, which further reduces unnecessary external force loading.

[0059] Specifically, the supporting platform 1 supports the annular component 100 via a plurality of universal ball transfers 4. These universal ball transfers 4 are arranged on the supporting surface of the supporting platform 1 and divided into multiple zones. These zones are evenly distributed along the circumference of the supporting platform 1, and the universal ball transfers 4 within each zone are evenly distributed. This arrangement evenly distributes the weight of the annular component 100 and any potential clamping forces to it across multiple contact points, preventing deformation of the annular component 100 caused by excessive local forces due to concentrated or unevenly distributed support points. This reduces the risk of deformation caused by insufficient local support, particularly for heavily loaded annular components 100, and further reduces the degree of force and deformation of the annular component 100 during the clamping process.

[0060] In addition, the evenly distributed universal ball bearings 4 can ensure that when the annular part 100 rotates, the friction force between it and the supporting platform 1 is more balanced at various circumferential positions, reducing rotation jams or offsets caused by local friction differences, and making the annular part 100 rotate more smoothly under the driving wheel, thereby avoiding additional stress generated by uneven force on the annular part 100 during the rotation adjustment process, and reducing the relative position fluctuation between the annular part 100 and the supporting platform 1 during the rotation process, providing a more stable basis for the subsequent fixing component 3 to lock the relative position, and indirectly reducing the risk of dimensional tolerance deviation caused by position instability during processing.

[0061] It should be noted that, in this embodiment, the universal ball 4 is divided into four areas, and the four areas correspond to the four rollers 2 one by one, so that each area is located below the roller 2 corresponding thereto.

[0062] In particular, a lifting assembly (not shown in the figure) is provided on the carrying platform 1 , and the lifting assembly can drive the universal ball 4 in multiple areas to move up and down, so as to lift or lower the annular part 100 .

[0063] When the annular part 100 needs to be removed, the lifting assembly lifts the universal ball 4 to lift the annular part 100 smoothly, reducing the contact between the annular part 100 and other fixed structures of the supporting platform 1, so that the annular part 100 only contacts the evenly distributed universal ball 4 during loading and unloading, avoiding the stress caused by unnecessary rigid contact in the non-processing stage.

[0064] When the annular component 100 needs to be driven to rotate, the raised universal ball transfer 4 reduces the frictional resistance between the annular component 100 and the supporting platform 1. Combined with the drive of the roller 2, the annular component 100 rotates more smoothly, reducing the additional stress caused by uneven friction during rotation. When the fixing assembly 3 locks the annular component 100 in place, the lowered universal ball transfer 4 strengthens the fit between the annular component 100 and the supporting platform 1, improving stability after fixation and reducing the risk of displacement caused by slight shaking of the annular component 100 during processing.

[0065] In this embodiment, the lifting assembly includes lifting parts that are arranged in a one-to-one correspondence with multiple areas, and each of the lifting parts is configured to drive the universal ball 4 in the corresponding area to rise and fall. It can be understood that the lifting assembly can achieve independent adjustment of the lifting state of the universal ball 4 in each area through the lifting parts that correspond to the multiple areas. For example, when a part of the annular part 100 is unstable in contact with the supporting platform 1 due to its large dead weight or shape deviation, the lifting parts of the corresponding area can be driven separately to adjust the height of the universal ball 4 in the area to ensure that the part of the annular part 100 forms a stable contact with the universal ball 4, while other areas can maintain or adjust the lifting state according to their own needs, so that each part of the annular part 100 can obtain an adapted support force and contact state, avoiding support imbalance caused by the inability of the overall synchronous lifting to adapt to local needs, and reducing the deformation of the annular part 100 caused by local stress concentration.

[0066] Under normal circumstances, when the annular component 100 has no significant individual differences (e.g., a regular outer periphery and evenly distributed weight), the multiple lifting members maintain a synchronized drive state. At this point, the lifting members corresponding to the universal ball transfers 4 in each region move in unison, driving the universal ball transfers 4 in different regions to rise and fall synchronously, ensuring that the contact height of the balls in each region is consistent.

[0067] It should be noted that the lifting parts are preferably cylinders, and the synchronous driving of multiple cylinders is achieved through unified air source control. Specifically, each cylinder is connected to the same air circuit system to ensure that the input air pressure, air flow speed and on-off timing are completely consistent. At the same time, cylinders with the same specifications and parameters are selected to avoid movement deviations due to hardware differences. When it is necessary to drive the universal ball 4 to rise and fall, the air source supplies air to each cylinder synchronously, so that the piston rods are synchronously extended and retracted under the same pressure, thereby driving the universal ball 4 in the corresponding area to maintain a consistent lifting rhythm and displacement. This control method can ensure the synchronous movement of the universal ball 4 in each area in a normal clamping scenario, provide balanced support for the annular part 100, and adapt to its clamping requirements in a regular state.

[0068] It should also be noted that the telescopic ends of the multiple cylinders are all provided with adapter plates to provide an area for arranging the universal ball 4 through the adapter plates, so they are not described in detail.

[0069] To improve positioning accuracy, the fixing assembly 3 includes a first positioning slot, a second positioning slot, and a connector 31. The first positioning slot is located on the lower end surface of the annular component 100. The second positioning slot is located on the support surface of the support platform 1 and corresponds to the first positioning slot. The connector 31 can be inserted into both the first and second positioning slots to fix the relative position of the annular component 100 and the support platform 1.

[0070] In actual applications, after the positions of the first positioning groove and the second positioning groove are aligned, the connecting member 31 is inserted into the two simultaneously, which can achieve precise alignment of the annular part 100 and the supporting platform 1 through the rigid cooperation of the mechanical structure, directly limit the circumferential and radial displacement of the annular part 100, avoid position offset caused by vibration or external force during processing, ensure the consistency of the processing reference, and improve dimensional accuracy.

[0071] In addition, the above-mentioned fixing method relies on the fitting limit of the positioning groove and the connecting member 31, rather than the radial / axial pressure of the traditional clamping structure, which can greatly reduce the additional stress on the annular part 100 during clamping. It is especially suitable for thin-walled or easily deformed annular parts 100, avoiding deformation caused by excessive clamping force.

[0072] In this embodiment, the annular part clamping device further includes a telescopic mechanism 5 for driving the movement of the rollers 2. A plurality of telescopic mechanisms 5 are provided corresponding to the number of rollers 2. During the convergence phase, the plurality of telescopic mechanisms 5 correspond one-to-one with the rollers 2, enabling independent adjustment of the extension and contraction of each roller 2. When the annular part 100 has an irregular periphery (such as local protrusions or depressions) due to manufacturing errors, the telescopic mechanism 5 at the corresponding position can individually adjust the extension of the roller 2, ensuring that each roller 2 precisely fits the periphery of the annular part 100. This allows the clamping force during convergence to be evenly distributed circumferentially, avoiding local overtightening or over-loosening due to overall linkage, and ensuring stable clamping and reliable driving of the annular part 100 in the converged state.

[0073] Furthermore, the multiple telescopic mechanisms 5 correspond one-to-one with the rollers 2, enabling independent adjustment of the motion state of each roller 2. For example, when the diameter of the annular component 100 changes, each telescopic mechanism 5 can independently drive the corresponding roller 2 to adjust its position radially, ensuring that all rollers 2 can effectively contact the outer circumference of the annular component 100.

[0074] Specifically, the telescopic mechanism 5 includes a servo electric cylinder 51 and a telescopic rod 52 . The servo electric cylinder 51 is used to drive the telescopic rod 52 to extend and retract along the radial direction of the annular part 100 . The roller 2 is transmission-connected to the telescopic rod 52 .

[0075] During the convergence, the high-precision control of the servo electric cylinder 51 can accurately adjust the extension and contraction of the telescopic rod 52, ensuring that each roller 2 can accurately fit according to the actual shape of the outer periphery of the annular part 100, achieving uniform distribution of circumferential clamping force, avoiding local over-tightening or over-loosening, and ensuring stable driving and clamping during convergence.

[0076] During separation, the servo electric cylinder 51 responds quickly and with controllable extension and retraction, driving the telescopic rod 52 to precisely retract the corresponding roller 2. This allows for synchronous retraction to achieve overall separation, while also adjusting the retraction to prevent sticking and pulling, significantly improving the controllability and adaptability of the gathering and separation processes.

[0077] It should be noted that the servo electric cylinder 51 is a prior art, and its specific model can be selected according to the actual application scenario. This embodiment does not impose specific requirements or restrictions on this. Of course, in other embodiments, the servo electric cylinder 51 can also select any other structure that can achieve direct drive, so it will not be described in detail.

[0078] For circular parts 100 with regular outer circumferences, to improve production efficiency, the circular part clamping device also includes a control unit that synchronously controls multiple servo electric cylinders 51, thereby causing multiple telescopic rods 52 to extend and retract synchronously. By driving the multiple servo electric cylinders 51 synchronously with the control unit, all rollers 2 can be simultaneously extended the same distance toward the center of the circular part 100, quickly achieving a uniform embrace of the outer circumference of the circular part 100. Compared to adjusting each telescopic mechanism 5 individually, this synchronized action significantly shortens the convergence time and avoids the premature or delayed localized bonding caused by independent adjustment time differences, thereby reducing the deviation of the circular part 100 due to uneven force during the convergence process.

[0079] It should be noted that the structure and operating principle of the control components are based on existing technologies and generally include a main controller, a signal bus, and a drive circuit. The main controller has a preset synchronization control program and sends a uniformly timed control signal to each servo electric cylinder 51 via the signal bus. The drive circuit converts the signal into an electrical signal, controlling the motor speed and direction of each servo electric cylinder 51 to be consistent, synchronizing the extension and retraction of the telescopic rod 52 and achieving coordinated movement of the roller 2.

[0080] To further ensure product quality, the outer periphery of roller 2 is coated with an elastic layer. This elastic layer deforms when contacting annular component 100, increasing friction. This ensures more reliable driving of annular component 100 during convergence and prevents slippage. Furthermore, the elastic material buffers contact forces, protecting the surface of annular component 100 from scratches caused by hard contact. It also adapts to minor irregularities around the outer periphery of annular component 100, enhancing clamping stability through synchronized or independent adjustment.

[0081] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A ring-shaped parts clamping device, characterized in that: The annular part clamping device comprises: A carrying platform (1) is used to carry the annular part (100) and is in sliding engagement with the annular part (100); A plurality of rollers (2) are provided around the circumference of the carrying platform (1), and the plurality of rollers (2) can converge toward the center to clamp the annular part (100), or separate outward to release the annular part (100); At least one of the rollers (2) is a driving wheel, and the other rollers (2) are driven wheels, so that the annular part (100) is driven by the driving wheel to rotate around its own axis on the carrying platform (1); The fixing assembly (3) is configured to fix the relative positions of the carrying platform (1) and the annular part (100).

2. The annular parts clamping device according to claim 1, characterized in that: The bearing platform (1) carries the annular part (100) via a plurality of universal balls (4); the plurality of universal balls (4) are arranged on the bearing surface of the bearing platform (1) and divided into a plurality of regions; the plurality of regions are evenly distributed along the circumference of the bearing platform (1), and the universal balls (4) in each region are evenly distributed.

3. The annular parts clamping device according to claim 2, characterized in that: A lifting assembly is provided on the carrying platform (1), and the lifting assembly is capable of driving the universal balls (4) in multiple areas to move up and down, so as to lift or lower the annular part (100).

4. The annular parts clamping device according to claim 3, characterized in that: The lifting assembly includes lifting members arranged in one-to-one correspondence with a plurality of areas, and the plurality of lifting members are configured to drive the universal ball (4) in the corresponding area to move up and down.

5. The annular parts clamping device according to claim 1, characterized in that: The fixing assembly (3) comprises: A first positioning groove is provided on the lower end surface of the annular part (100); A second positioning groove is provided on the bearing surface of the bearing platform (1) and can correspond to the position of the first positioning groove; The connecting member (31) can be inserted into the first positioning groove and the second positioning groove at the same time to fix the relative position of the annular part (100) and the carrying platform (1).

6. The annular parts clamping device according to claim 1, characterized in that: The annular part clamping device further comprises a telescopic mechanism (5) for driving the roller (2) to move, and a plurality of the telescopic mechanisms (5) are provided corresponding to the number of the rollers (2).

7. The annular parts clamping device according to claim 6, characterized in that: The telescopic mechanism (5) comprises a servo electric cylinder (51) and a telescopic rod (52). The servo electric cylinder (51) is used to drive the telescopic rod (52) to extend and retract along the radial direction of the annular part (100). The roller (2) is in transmission connection with the telescopic rod (52).

8. The annular parts clamping device according to claim 7, characterized in that: The annular part clamping device further comprises a control component for synchronously controlling the plurality of servo electric cylinders (51) so as to enable the plurality of telescopic rods (52) to be synchronously extended and retracted.

9. The annular parts clamping device according to claim 1, characterized in that: The outer periphery of the roller (2) is coated with an elastic layer, so that when abutting against the annular part (100), the friction force is increased through the elastic deformation of the elastic layer.

10. A clamping method for an annular part clamping device according to any one of claims 1 to 9, characterized in that: The clamping method comprises the following steps: Placing the annular component (100) on the carrying platform (1); driving the plurality of rollers (2) to converge toward the center to clamp the outer periphery of the annular part (100); The annular part (100) is driven by the driving wheel to rotate around its own axis on the carrying platform (1); The relative positions of the carrying platform (1) and the annular part (100) are fixed by the fixing assembly (3); After the processing is completed, the plurality of rollers (2) are driven to separate outwards synchronously, thereby releasing the annular part (100).

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