Thighbone offset plate processing jig

Abstract

The utility model relates to a thighbone offset plate machining jig which comprises an integrally-formed jig body, and a first containing part and a second containing part which are concave inwards are arranged on the jig body. A pressing part is movably arranged on the second placing part in the length direction of the second placing part; and a magnetic attraction part is embedded in the first placing part. According to the utility model, the thighbone offset plate can be accurately positioned and stably clamped, and the position accuracy and stability of the thighbone offset plate in the machining process are ensured, so that the machining quality and the production efficiency are improved, and the requirement of high-accuracy manufacturing of orthopedic medical instruments is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument processing technical field especially is a femur offset plate processing fixture. BACKGROUND

[0002] In the field of orthopedic medical instruments, the quality and precision of femur offset plates directly affect the surgical outcome and recovery of patients. During the traditional processing of femur offset plates, the lack of specially designed high-precision processing fixtures often leads to many problems.

[0003] Ordinary fixtures cannot accurately fix femur offset plates, causing displacement and shaking during processing. In drilling, milling, and other processing procedures, inaccurate positioning can compromise the precision of key dimensions such as hole diameter, slot width, and contour, affecting the compatibility of the femur offset plate with the femur and reducing the stability and reliability of the surgical implant. Moreover, the clamping method of traditional fixtures may damage the surface of the femur offset plate, such as scratches and indentations, which not only affects the appearance quality of the product but also changes its surface properties, thereby affecting its biocompatibility and service life in the human body. In addition, some complex femur offset plate processing techniques require specific forces or special positioning during processing, and existing fixtures often cannot meet these needs, limiting the innovation and development of processing techniques and failing to meet the demand for high-precision, high-quality products in the modern orthopedic medical instrument manufacturing industry. Therefore, it is of great practical significance to develop a femur offset plate processing fixture that can solve the above problems. SUMMARY

[0004] The utility model aims at providing a femur offset plate processing fixture that can accurately position and stably clamp the femur offset plate, ensuring the positional precision and stability of the femur offset plate during processing, thereby improving processing quality and production efficiency and meeting the requirements of high-precision manufacturing of orthopedic medical instruments, to solve the above technical problems.

[0005] The utility model discloses a femur offset plate processing fixture which is mainly composed of a one-piece jig body, and the jig body is provided with a first placement part and a second placement part which are concave. The first placement part is mainly used for preliminarily positioning and adsorbing a specific part of the femur offset plate, and a magnetic adsorption part is embedded in the first placement part to stably adsorb the femur offset plate in the first placement part by magnetic force. The second placement part is used for placing another part of the femur offset plate, and a pressing part is movably arranged in the length direction of the second placement part to further clamp the femur offset plate, so that displacement of the femur offset plate during processing is avoided. The first placement part and the second placement part are connected on one side, which facilitates placement and positioning of the femur offset plate. The depths of the first placement part and the second placement part are different, and this design is suitable for the shape characteristics of the femur offset plate, so that the femur offset plate can be better supported and fixed.

[0006] Further, the jig body is integrally formed by using a metal material (such as titanium alloy or stainless steel) with high strength, high hardness and good stability, so that the jig can withstand various external forces such as cutting force and impact force during processing without deformation or damage. The shape and size of the jig body are accurately calculated to be highly matched with the contour of the femur offset plate. The shape, depth and relative position of the first placement part and the second placement part on the jig body are optimized according to the structural characteristics of the femur offset plate. The transition between the first placement part and the second placement part is smooth, which facilitates placement and adjustment of the femur offset plate. A hard coating with a thickness of 0.1 microns is sprayed on the transition between the first placement part and the second placement part. The hard coating has high hardness, low friction coefficient and good wear resistance, which can effectively reduce the friction between the femur offset plate and the jig body during placement and movement, avoid scratching or wearing the surface of the femur offset plate, and improve the wear resistance and service life of the jig body. A first through hole is arranged in the center of the second placement part, and a second through hole is arranged on the left side of the first through hole. These through holes can be used for dust collection, air blowing or auxiliary positioning during processing. For example, during drilling, the metal chips generated can be sucked away through the through holes to keep the processing area clean and improve the processing accuracy. In some processing techniques that require cooling of the femur offset plate, cooling gas can be introduced through the through holes to reduce the processing temperature and prevent the femur offset plate from deforming due to overheating.

[0007] Further, the first placing part is provided with a profiling positioning shoulder, the shape of the profiling positioning shoulder is accurately matched with the specific profile shape of the femoral offset plate, when the femoral offset plate is placed in the first placing part, the profiling positioning shoulder can preliminarily position the femoral offset plate, limit the horizontal displacement of the femoral offset plate, and ensure that the placement position of the femoral offset plate is accurate. Six magnetic attraction components are embedded in the first placing part in a plum blossom shape, the magnetic attraction components include a magnetic core embedded in the first placing part, and a coil is wound on the side of the magnetic core. By energizing the coil, a magnetic field can be generated to attract the femoral offset plate to the first placing part. This plum blossom-shaped distribution can uniformly distribute the magnetic force in the adsorption area of the femoral offset plate, enhance the stability of adsorption, and adjust the current size of the coil according to the material and shape characteristics of the femoral offset plate, so as to control the strength of the magnetic force, which can not only ensure that the femoral offset plate is firmly adsorbed, but also will not cause damage to the femoral offset plate due to excessive magnetic force.

[0008] Further, the pressing component includes a screw rod rotatably arranged on the jig body, and the connection between the screw rod and the jig body adopts a high-precision bearing or shaft sleeve structure, so that the screw rod can be flexibly rotated and the shaft center line position is stable. A pressure head is movably connected to the screw rod through a screw rod sleeve, and the screw rod sleeve and the screw rod are matched with each other through a precise screw thread, so that when the screw rod rotates, the screw rod sleeve can stably move along the axial direction of the screw rod, thereby driving the pressure head to slide on the jig body. A wear-resistant layer is arranged at one end of the pressure head, which can be made of hard alloy or ceramic material, which can effectively reduce the wear of the pressure head during contact with the femoral offset plate, prolong the service life of the pressure head, and avoid damage to the surface of the femoral offset plate due to wear of the pressure head. A cross recess is arranged at one end of the screw rod, which is convenient for screwing operation by using a screwdriver or the like, and the position of the pressure head can be accurately adjusted by rotating the screw rod, so that the femoral offset plate can be clamped or released, and the clamping force can be flexibly adjusted according to the thickness of the femoral offset plate and the processing requirements.

[0009] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0010] 1) The utility model discloses a profiled positioning shoulder of first placing part is carefully designed according to the specific profile shape of femoral offset plate, and the fitting precision with femoral offset plate is extremely high, when femoral offset plate is placed in first placing part, profiled positioning shoulder can rapidly and accurately determine the position of femoral offset plate in horizontal direction, effectively limits its displacement possibility in the plane, provides accurate reference for subsequent processing operation. Meanwhile, six magnetic attraction components that are embedded in first placing part in the form of plum blossom play the key adsorption fixing effect. The coil that is wound around the side of magnetic core generates magnetic field after energization, and femoral offset plate is firmly adsorbed in first placing part. This plum blossom distribution mode makes the magnetic force uniformly act on the adsorption area of femoral offset plate, avoids the local lifting or deviation of femoral offset plate due to uneven magnetic force. Through the preliminary positioning of profiled positioning shoulder and the strong adsorption of magnetic attraction component, the two work together to constrain femoral offset plate from different dimensions, greatly improve the positioning accuracy of femoral offset plate before processing, ensure that the key parts (such as mounting hole position, fitting curved surface etc.) of femoral offset plate can be accurately processed according to the design requirement in the drilling, milling and other processing procedures, effectively reduce the processing error due to inaccurate positioning, improve the qualified rate and quality stability of product.

[0011] 2) The utility model discloses a compression part on second placing part provides stable and adjustable clamping force for femoral offset plate. The screw rod rotatably sets up on jig body, guarantees the flexibility of rotation and the stability of axial line through high accuracy bearing or shaft sleeve structure. The screw rod sleeve on screw rod is connected with the pressure head, when the screw rod is screwed, the screw rod sleeve can accurately move along the axial direction of screw rod, and then drive the pressure head to slide on the jig body. The wear -resisting layer of the pressure head one end adopts hard alloy or ceramic and is made, not only effectively reduces the wear and tear of pressure head in the process of contacting with femoral offset plate, prolongs the service life of pressure head, but also avoids the scratch, indentation and other damage to the surface of femoral offset plate due to the wear of pressure head, ensures the surface quality of femoral offset plate. In actual use, the operator can accurately control the position of pressure head and the size of clamping force through adjusting the screwing angle of screw rod according to the thickness, material and processing technological requirement of femoral offset plate. This adjustable clamping mode can adapt to the processing requirement of different specifications of femoral offset plate, whether it is the thin light offset plate or the thick heavy offset plate, can be firmly clamped on the jig, effectively resists the cutting force, vibration and other external force interference in the processing process, prevents the displacement or shaking of femoral offset plate, further guarantees the processing precision and product quality.

[0012] 3) The design of the first and second placement parts on the jig body is highly compatible with the shape characteristics of the femoral offset plate. They are connected on one side and have different depths. This design allows the femoral offset plate to be placed naturally and accurately on the jig, reducing the adjustment time and difficulty during placement. During processing, such as milling, the jig can stably support the femoral offset plate, allowing it to maintain a good stress state under different cutting angles and directions, avoiding processing vibration or uneven cutting caused by poor contact between the jig and the femoral offset plate, and improving processing efficiency and surface quality. Moreover, the 0.1 micron hard coating sprayed at the transition connection between the first and second placement parts plays an important role. This coating has high hardness and low friction coefficient, significantly reducing friction between the femoral offset plate and the jig body during placement and movement, reducing the impact of friction on processing accuracy, and protecting the surface of the femoral offset plate from scratches, ensuring the appearance quality and surface performance of the product. In addition, the first and second through holes on the inside of the second placement part provide various auxiliary functions during processing. During drilling, the air holes can be connected to a dust collection device to remove metal chips generated during drilling, keeping the processing area clean and avoiding the impact of metal chips on the tool and processing accuracy, reducing tool wear and processing errors caused by delayed chip cleaning, and improving drilling accuracy and efficiency; in some processing techniques that require cooling of the femoral offset plate (such as high-speed milling), the air holes can be connected to cooling gas, effectively reducing the processing temperature and preventing the femoral offset plate from deforming due to overheating, ensuring the accuracy of the processing size and the quality stability of the product, and further improving processing efficiency and product quality.

[0013] 4) The cross-shaped groove at one end of the screw of the pressing component greatly facilitates the use of a screwdriver or other tool for screwing. When clamping the femoral offset plate, the operator only needs to simply rotate the tool to accurately adjust the position of the pressing head, achieving clamping or loosening of the femoral offset plate. The operation steps are simple and convenient, reducing clamping time and improving production efficiency. Moreover, the overall design of the jig makes it highly versatile. By adjusting the coil current of the magnetic attraction component, the strength of the magnetic force can be changed to meet the adsorption needs of femoral offset plates made of different materials (such as stainless steel, titanium alloy, etc.). The adjustable clamping force of the pressing component can also meet the clamping requirements of femoral offset plates of different thicknesses and sizes. Whether it is a small-sized customized femoral offset plate or a large-sized standard femoral offset plate, it can be efficiently and accurately processed on this jig. This wide applicability reduces the cost of enterprises needing to equip multiple jigs for producing different types of femoral offset plates, improves the utilization rate of production equipment, and enhances the market competitiveness of enterprises in the medical device manufacturing field. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a jig for machining a femoral offset plate. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0016] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0017] Please refer to the drawings Figure 1 As shown in the drawings: a femoral offset plate machining jig, comprising a one-piece jig body 1, the jig body 1 is provided with a concave first placement part 2 and a second placement part 3; the second placement part 3 is movably provided with a pressing part 4 along the length direction thereof; the first placement part 2 is embedded with a magnetic attraction part 5.

[0018] On the basis of the above-mentioned embodiments, one side of the first placement part 2 and the second placement part 3 is communicated; the depth of the first placement part 2 and the second placement part 3 is much smaller than the depth of the second placement part 3.

[0019] On the basis of the above-mentioned embodiments, the first placement part 2 is provided with a profiling positioning shoulder 21; the transition connection of the first placement part 2 and the second placement part 3 is provided with a hard coating 22 with a thickness of 0.1 microns on the side of the spray head.

[0020] On the basis of the above-mentioned embodiments, the second placement part 3 is centrally provided with a first through air hole; the second placement part 3 is provided with a second through air hole on the left side of the first through air hole.

[0021] On the basis of the above-mentioned embodiments, the pressing part 4 comprises a screw rod 41 rotatably arranged on the jig body 1; the screw rod 41 is movably connected with a pressure head 42 through a screw sleeve; one end of the screw rod 41 is provided with a cross recess;

[0022] Wherein: when the screw rod 41 is screwed, the pressure head 42 can slide on the jig body 1.

[0023] On the basis of the above-mentioned embodiments, one end of the pressure head 42 is provided with a wear-resistant layer.

[0024] On the basis of the above-mentioned embodiment, six said magnetic attraction components 5 are embedded in the first placement part 2 in a quincunx shape; said magnetic attraction component 5 comprises a magnetic core 51 inserted into the first placement part 2; and a coil is wound around the magnetic core 51.

[0025] In use of the femur offset plate machining jig, first, the jig body is accurately installed on the worktable of the machining machine through the positioning structure (such as positioning pin or positioning groove) at the bottom, ensuring that the jig body does not displace or shake during the machining process. Then, according to the material and machining requirements of the femur offset plate, the magnetic force of the magnetic attraction component is adjusted, and by passing appropriate current through the coil of the magnetic attraction component, a suitable magnetic field is generated. Next, the femur offset plate is placed on the first placement part of the jig body, so that it closely fits the profiling positioning shoulder. At this time, the magnetic attraction component adsorbs the femur offset plate in the first placement part, achieving preliminary positioning and fixation. Then, the other part of the femur offset plate is placed on the second placement part, and a screwdriver or other tool is used to screw the screw rod of the pressing component. The rotation of the screw rod drives the movement of the screw rod sleeve and the pressing head, so that the pressing head gradually approaches the femur offset plate and exerts clamping force on it, further fixing the femur offset plate. During the clamping process, the screwing angle of the screw rod can be accurately adjusted according to the thickness of the femur offset plate and the machining process requirements, and the position of the pressing head and the size of the clamping force can be controlled, to ensure that the femur offset plate is firmly clamped and will not be damaged due to excessive clamping force. During the entire machining process, the magnetic attraction component of the first placement part continuously provides adsorption force, and the pressing component remains in a clamped state, while the air holes of the second placement part can be used for dust suction, air blowing or auxiliary positioning operations as needed. For example, during drilling, the air holes perform dust suction operation to timely remove the metal chips generated during drilling, keeping the machining area clean and avoiding the impact of metal chips on the machining precision and the surface quality of the femur offset plate; during milling, cooling gas can be introduced through the air holes to reduce the machining temperature and prevent the femur offset plate from deforming due to overheating. When the machining process of the femur offset plate is completed, the screw rod is unscrewed, the pressing component is loosened, the power of the magnetic attraction component is turned off, and the adsorption and clamping of the femur offset plate are released. Then, the machined femur offset plate is carefully taken out of the jig body, and the next round of machining operation is prepared.

[0026] The above description is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes, modifications and simplifications made according to the technical essence of the present application to the above embodiments, all still belong to the scope of the present application.

Claims

1. A femoral offset plate processing fixture, comprising an integrally formed fixture body (1), characterized in that: The fixture body (1) is provided with a recessed first placement part (2) and a second placement part (3); the second placement part (3) is provided with a pressing part (4) that can move along its length direction; the first placement part (2) is provided with a magnetic suction part (5).

2. The femoral offset plate processing fixture as described in claim 1, characterized in that: The first placement part (2) and the second placement part (3) are connected on one side; the depth of the first placement part (2) and the second placement part (3) is much smaller than the depth of the second placement part (3).

3. The femoral offset plate processing fixture as described in claim 2, characterized in that: The first placement part (2) is provided with a contour positioning shoulder (21); the nozzle side of the transition connection between the first placement part (2) and the second placement part (3) has a hard coating (22) with a thickness of 0.1 micrometers.

4. The femoral offset plate processing fixture as described in claim 3, characterized in that: The second placement part (3) has a first through air hole (31) in the center of its inner side; a second through air hole (32) is provided on the left side of the first through air hole (31).

5. The femoral offset plate processing fixture as described in claim 1, characterized in that: The clamping component (4) includes a screw (41) rotatably mounted on the fixture body (1); a pressure head (42) is movably connected to the screw (41) via a lead screw sleeve; and a cross groove is provided at one end of the screw (41). When the screw (41) is turned, the pressure head (42) can be driven to slide on the fixture body (1).

6. The femoral offset plate processing fixture as described in claim 5, characterized in that: One end of the pressure head (42) is provided with a wear-resistant layer.

7. The femoral offset plate processing fixture as described in claim 1, characterized in that: The six magnetic components (5) are embedded in the first placement part (2) in a plum blossom shape; the magnetic component (5) includes a magnetic core (51) inserted into the first placement part (2); a coil is wound around the periphery of the magnetic core (51).

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