Eccentric machining positioning clamp

Abstract

The utility model relates to an eccentric machining positioning clamp which comprises a clamp body. The clamp body is provided with a concave columnar eccentric hole; a concave eccentric cam-shaped groove is formed in one side of the clamp body; the columnar eccentric hole is communicated with the eccentric cam-shaped groove; a deformation part is embedded in the inner side of the columnar eccentric hole, and the deformation part shrinks and deforms in the radial direction to clamp a part under the action of an electric field. Through the design of the columnar eccentric hole and the eccentric cam-shaped groove in the clamp body, the medical skeleton eccentric part can be accurately positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment processing fixtures, in particular to an eccentric processing positioning fixture used for medical bone processing. Background Art

[0002] During medical bone processing, the machining of eccentric bone components or related parts requires precise positioning and reliable clamping to ensure machining accuracy and quality. Traditional fixtures may not be able to meet the special positioning requirements of eccentric parts, or they may easily damage the parts during the clamping process, and may not be able to achieve precise control of the clamping force. Summary of the Invention

[0003] The purpose of this utility model is to provide an eccentric machining positioning fixture with the advantages of reasonable structure, complete functions, easy operation, high precision and good stability, which can effectively meet the various needs of medical bone eccentric parts processing to solve the above technical problems.

[0004] To achieve the above technical solution, the present invention provides the following technical solutions: The fixture primarily comprises a fixture body. The fixture body is provided with an inwardly concave cylindrical eccentric hole and an eccentric cam-shaped groove. The cylindrical eccentric hole is used to accommodate the eccentric part to be processed. Its eccentric design matches the shape of the part, enabling preliminary positioning. The eccentric cam-shaped groove communicates with the cylindrical eccentric hole, providing more space and convenience for part placement and operation.

[0005] A deformation part is embedded in the inner side of the cylindrical eccentric hole. Under the action of the electric field, the deformation part shrinks radially to clamp the part. This clamping method can achieve adaptive clamping of the part, ensuring that the part will not be displaced during the processing. At the same time, it can accurately control the clamping force to avoid damage to the part.

[0006] The connection between the cylindrical eccentric hole and the eccentric cam groove forms a crescent-shaped locating shoulder. The locating shoulder provides further positioning and support when placing the part, ensuring that the part can be accurately placed in the predetermined position and can withstand certain cutting forces and vibrations during machining to maintain the stability of the part.

[0007] Three deformable parts are embedded in a triangular shape within the cylindrical eccentric hole. This triangular distribution distributes the clamping force more evenly across the part, improving clamping stability and reliability. The deformable parts consist of a first deformable part, an insulating layer, and a second deformable part, which are sequentially bonded from the outside inward.

[0008] Both the first and second deforming sections are arc-shaped piezoelectric ceramics, which deform under the influence of an electric field. When an electric field is applied, the piezoelectric ceramics undergo radial contraction, thereby clamping the part. The piezoelectric ceramics are 3mm thick, a carefully designed thickness that ensures sufficient deformation capacity while meeting the structural strength and stability requirements of the fixture.

[0009] The insulating layer is located between the first deformable portion and the second deformable portion, and plays an insulating role to prevent the electric field leakage from affecting other components, while also ensuring that the piezoelectric ceramic can work normally.

[0010] The fixture body height (L) is 40mm > L > 36.6mm. This height range is designed based on the actual needs of medical bone processing and operational convenience. While ensuring stable installation and operation, the fixture dimensions are optimized to adapt to different processing equipment and working environments.

[0011] The height of the cylindrical eccentric hole is 14.5 mm, which matches the size and shape of the part to be processed. This height can ensure that the part has sufficient placement space and positioning accuracy in the cylindrical eccentric hole, while also taking into account the overall structural strength of the fixture and the requirements of the processing technology.

[0012] The nozzle has a 0.2-micron-thick wear-resistant coating on the inner surface of the eccentric cam groove. This coating reduces friction and wear between the part and the inner surface of the eccentric cam groove, extending the life of the fixture. During machining, the part may move or adjust within the eccentric cam groove. The wear-resistant coating protects the fixture surface from damage and maintains the surface quality of the part, preventing defects such as scratches caused by friction.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The cylindrical eccentric hole and eccentric cam groove in the fixture body enable precise positioning of eccentric medical bone parts. The eccentric structure of the cylindrical eccentric hole matches the shape of the part, and the crescent-shaped positioning shoulder further ensures accurate and stable part placement. This precise positioning method significantly reduces machining errors caused by inaccurate positioning, ensuring that the finished parts meet the high-precision requirements of medical applications, and improving the success rate and effectiveness of surgeries.

[0015] 2) The deformable portion, designed by leveraging the electric field-controlled deformation characteristics of piezoelectric ceramics, enables adaptive clamping of parts. Under the influence of the electric field, the deformable portion automatically adjusts the clamping force based on the shape and size of the part, ensuring that the part does not shift or wobble during processing, thereby ensuring stable and continuous processing. This electric field-controlled clamping method offers the advantages of fast response and controllable clamping force, enabling rapid clamping and release of parts, improving processing efficiency. Furthermore, by precisely controlling the clamping force, damage to the part caused by excessive clamping force can be avoided, ensuring part integrity and processing quality.

[0016] 3) Dimensional parameters such as the height of the fixture body and the height of the cylindrical eccentric hole have been rationally designed to meet the practical needs of medical bone processing while ensuring the fixture's structural strength and stability. A wear-resistant coating on the inner surface of the eccentric cam groove reduces friction and wear between the part and the fixture, extending the fixture's service life while also ensuring the surface quality of the part. These design features make the fixture more reliable and durable during use, improving its overall performance and processing quality.

[0017] 4) The design of three triangular deformable parts embedded in the cylindrical eccentric hole ensures a more even distribution of clamping force on the part, improving clamping stability and reliability. Compared with traditional clamping methods, this design can better cope with external interference such as cutting forces and vibration during processing, ensuring that the part is always in the correct position, further improving processing accuracy and quality.

[0018] In summary, the eccentric machining positioning fixture used for medical bone processing has the advantages of reasonable structure, complete functions, easy operation, high precision and good stability. It can effectively meet the various needs of medical bone eccentric parts processing and provide reliable technical support and guarantee for improving processing quality and surgical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0020] Figure 1 A three-dimensional diagram of the positioning fixture for eccentric machining;

[0021] Figure 2 for Figure 1 Cross-sectional view of AA in the figure. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Please see the attached Figures 1 to 2 As shown: An eccentric processing positioning fixture, comprising a fixture body 1; the fixture body 1 is provided with a concave cylindrical eccentric hole 2; a concave eccentric cam-shaped groove 3 is provided on one side of the fixture body 1; the cylindrical eccentric hole 2 is connected to the eccentric cam-shaped groove 3; a deformation part 4 is embedded in the inner side of the cylindrical eccentric hole 2, and under the action of an electric field, the deformation part 4 contracts and deforms radially to clamp the part. Through the design of the cylindrical eccentric hole and the eccentric cam-shaped groove on the fixture body, medical bone eccentric parts can be accurately positioned. The eccentric structure of the cylindrical eccentric hole matches the shape of the part, and the crescent-shaped positioning shoulder further ensures the accuracy and stability of the part placement. This precise positioning method can greatly reduce the processing errors caused by inaccurate positioning, ensure that the processed parts meet the high-precision requirements of medical applications, and improve the success rate and effect of the operation.

[0025] Based on the above embodiment, the connection between the cylindrical eccentric hole 2 and the eccentric cam-shaped groove 3 forms a crescent-shaped positioning shoulder 5.

[0026] Based on the above embodiment, the three deformable parts 4 are triangularly embedded in the cylindrical eccentric hole 2; the deformable part 4 includes a first deformable part 41, an insulating layer 42 and a second deformable part 43 adhered in sequence from the outside to the inside.

[0027] Based on the above embodiment, the first deformable portion 41 and the second deformable portion 43 are both arc-shaped piezoelectric ceramics; the thickness of the piezoelectric ceramics is 3 mm.

[0028] Based on the above embodiment, the height of the clamp body 1 is L, 40 mm>L>36.6 mm.

[0029] Based on the above embodiment, the height of the cylindrical eccentric hole 2 is 14.5 mm.

[0030] Based on the above embodiment, the nozzle head is provided with a wear-resistant coating with a thickness of 0.2 microns on the inner surface of the eccentric cam-shaped groove 3 .

[0031] During use, the eccentric machining positioning fixture is installed on a suitable machining equipment workbench, ensuring that the fixture body is securely mounted and free of looseness. The fixture body can be secured to the workbench using bolts or other suitable fixing methods to prevent displacement during machining. The piezoelectric ceramic of the deformation portion is then connected to an electric field control device to ensure a correct and stable circuit connection. The electric field control device is debugged, and appropriate electric field parameters, such as electric field strength and frequency, are set. By applying an electric field, the contraction clamping function of the deformation portion is tested to ensure proper function and to observe whether the clamping force meets machining requirements. A simulated medical bone component specimen can be used for testing, and the electric field parameters can be adjusted until the optimal clamping effect is achieved. The fixture's position and angle on the machining equipment workbench are then adjusted according to machining process requirements to ensure that the cylindrical eccentric hole and eccentric cam-shaped groove align with the machining tool or machining path, ensuring machining accuracy. Measuring tools such as a micrometer can be used to accurately measure and adjust the fixture's position. The practical operation process is as follows: Part placement: Carefully place the eccentric medical bone part to be processed into the cylindrical eccentric hole of the fixture body, aligning the eccentric portion of the part with the eccentric structure of the cylindrical eccentric hole. A crescent-shaped positioning shoulder assists in positioning and ensures accurate placement of the part. Clamping: Activate the electric field control device to apply an electric field to the piezoelectric ceramic of the deformable portion. Under the action of the electric field, the first and second deformable portions undergo radial deformation, causing them to contract radially to clamp the part. Observe the clamping state of the part to ensure a secure and even clamping without damaging the part. During the clamping process, the electric field strength can be adjusted according to actual conditions to achieve the appropriate clamping force. Machining: After the part is clamped, the corresponding machining operation, such as cutting, grinding, and drilling, can be carried out. During the machining process, the operator should closely monitor the machining process to ensure smooth progress. Furthermore, the clamping state and position of the part should be regularly checked for changes. If any abnormality is detected, the machining process should be stopped and adjusted immediately. Loosening and Removal: When processing is complete, the electric field control device is turned off, the deformed part returns to its original shape, and the clamping of the part is released. The processed part is carefully removed from the fixture, taking care to avoid damage to the part and the fixture. The entire design offers advantages such as a rational structure, comprehensive functionality, easy operation, high precision, and excellent stability. It effectively meets the various requirements of medical eccentric bone part processing and provides reliable technical support and assurance for improving processing quality and surgical outcomes.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art should be able to utilize the technical contents disclosed above and make equivalent embodiments that are equivalent changes by making slight changes or modifications without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An eccentric machining positioning fixture, characterized in that: The clamp body (1) comprises a clamp body (1); the clamp body (1) is provided with an inwardly concave cylindrical eccentric hole (2); a concavely concave eccentric cam-shaped groove (3) is provided on one side of the clamp body (1); the cylindrical eccentric hole (2) is connected to the eccentric cam-shaped groove (3); a deformation part (4) is embedded in the inner side of the cylindrical eccentric hole (2); under the action of an electric field, the deformation part (4) contracts radially to deform and clamp the part.

2. The eccentric machining positioning fixture according to claim 1, characterized in that: The connection between the cylindrical eccentric hole (2) and the eccentric cam-shaped groove (3) forms a crescent-shaped positioning shoulder (5).

3. The eccentric machining positioning fixture according to claim 1, characterized in that: The three deformable parts (4) are triangularly embedded in the cylindrical eccentric hole (2); the deformable parts (4) include a first deformable part (41), an insulating layer (42), and a second deformable part (43) that are sequentially adhered from the outside to the inside.

4. The eccentric machining positioning fixture according to claim 3, characterized in that: The first deformable portion (41) and the second deformable portion (43) are both arc-shaped piezoelectric ceramics; the thickness of the piezoelectric ceramics is 3 mm.

5. The eccentric machining positioning fixture according to claim 1, characterized in that: The height of the clamp body (1) is L, 40mm>L>36.6mm.

6. The eccentric machining positioning fixture according to claim 1, characterized in that: The height of the cylindrical eccentric hole (2) is 14.5 mm.

7. The eccentric machining positioning fixture according to claim 1, characterized in that: The nozzle has a wear-resistant coating with a thickness of 0.2 microns on the inner surface of the eccentric cam-shaped groove (3).

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