A glass-ceramic jig for a denture carving machine and a denture carving machine

Abstract

The utility model discloses a glass ceramic jig and false tooth engraver for false tooth engraver, wherein the jig is additionally provided with an outside clamping part, and the inside clamping part is cooperatively arranged with a loading groove, the design can on one hand multiply the total number of loading grooves under the premise of keeping the external size of the jig unchanged, significantly improve the number of single processing blank, reduce the frequency of shutdown and change material, thereby greatly improve the equipment productivity and time utilization rate, on the other hand, when the loading quantity is unchanged, the jig volume can be significantly reduced, miniaturization and light weight are realized, and greater space flexibility is provided for the parallel processing of multiple jigs in the work cabin or the optimization of tool path. At the same time, the blank is dispersed in the space isolated inside and outside clamping part, effectively avoids the interference and vibration coupling of the clamping mechanism, provides an independent stable clamping environment for the brittle glass ceramic blank, significantly reduces the risk of collapse and hidden crack in the processing process, and reliably guarantees the product yield and quality consistency while efficiently processing.

Description

Technical Field

[0001] This utility model relates to the field of dental prosthesis processing technology, and in particular to a glass-ceramic fixture for a dental prosthesis carving machine and a dental prosthesis carving machine. Background Technology

[0002] With the rapid development of digital dental restoration technology, the demand for personalized custom dentures is increasing, which places higher demands on the processing efficiency of denture carving machines. Denture carving machines shape denture structures by cutting prefabricated abutments, ceramic blanks, or zirconia; their processing precision and efficiency directly determine the quality and production cost of the final restoration. In mass production or when multiple restorations need to be processed continuously, the amount of raw material that the cutting machine fixture can load at one time becomes a key bottleneck affecting overall production efficiency.

[0003] Currently, there are various mounting clamps and fixtures on the market for fixing precast bases or ceramic blanks. For example, utility model patent CN218168931U discloses a cutting machine for installing precast base components, such as... Figure 1 As shown, by setting a prefabricated base with an anti-rotation surface and a hemispherical fixing groove, and a matching mounting fixture with a spring-loaded engaging part, the clamping accuracy and efficiency of a single prefabricated base are effectively improved. The fixture body is usually annular or hollow rectangle, and multiple receiving slots are opened on its inner circumferential direction to load the prefabricated base.

[0004] While the mounting fixture disclosed in CN218708431U solves the problems of clamping accuracy and ease of operation by improving the clamping mechanism, its fixture structure itself has inherent limitations: its space utilization is limited by the central hole diameter and peripheral dimensions of the fixture, resulting in a limited number of raw materials that a single fixture can hold. When large-scale processing is required, frequent changes of fixtures or raw materials are necessary, which not only increases the labor intensity of operators but also reduces the overall utilization rate of the cutting machine due to the increased downtime of the equipment. In addition, this closed or near-closed annular structure also increases the overall volume and material cost of the fixture to some extent.

[0005] Therefore, existing technologies lack fixtures that can significantly increase the amount of raw materials loaded within a limited space, thereby greatly improving the continuous operation efficiency of dental prosthesis carving machines without sacrificing clamping accuracy and stability. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a glass-ceramic fixture for a dental prosthesis carving machine and a dental prosthesis carving machine, aiming to solve the problem that the prior art lacks a fixture that can significantly increase the amount of raw materials loaded in a limited space, thereby greatly improving the continuous operation efficiency of the dental prosthesis carving machine without sacrificing clamping accuracy and stability.

[0007] The technical solution of this utility model is as follows:

[0008] A glass-ceramic fixture for a dental prosthesis carving machine includes a base defining a central region. An inner clamping part is provided on the side of the base facing the central region, and a plurality of first loading slots for clamping glass-ceramic blanks are provided on the inner clamping part. An outer clamping part is also provided on the side of the base away from the central region, and a plurality of second loading slots for clamping glass-ceramic blanks are provided on the outer clamping part.

[0009] The advantages of the above solution are as follows: This utility model, by adding an outer clamping part located on the side of the base away from the central area, in addition to the conventional inner clamping part facing the central area, and setting multiple loading slots on both clamping parts, firstly achieves a fundamental shift from "single-sided space utilization" to "double-sided space synergistic utilization" in the macroscopic layout of the fixture. Because the introduction of the outer clamping part activates the external contour space of the base that was not previously used for clamping, the design of the fixture can be optimized in two ways: firstly, while maintaining an external projection size similar to traditional fixtures, the total number of loading slots is nearly doubled through the arrangement of inner and outer slots; secondly, when the same number of loading slots is required, the inherent structural volume formed by the base around the central area can be significantly reduced, achieving miniaturization and weight reduction of the fixture. Given that the space in the working chamber of the dental prosthesis engraving machine is extremely valuable and the processing time of glass-ceramic blanks is long, therefore, the first approach mentioned above... This directly translates into a significant increase in the number of blanks processed in a single work cycle, greatly reducing the frequency of downtime for fixture replacement, thereby improving the overall capacity and time utilization of the equipment. The second approach provides greater spatial flexibility for simultaneously arranging multiple fixtures or optimizing tool movement paths within the engraving machine's work chamber. Furthermore, since glass and ceramics are brittle materials and extremely sensitive to stress concentration and mechanical interference during clamping, distributing multiple blanks across the naturally isolated inner and outer clamping sections helps to fundamentally avoid interference and vibration coupling in the clamping mechanism caused by all clamping stations being concentrated in a single annular area. This provides a more independent and stable clamping environment for each blank, significantly reducing the risk of edge chipping and internal micro-cracks caused by improper clamping or mutual interference in high-speed engraving. Thus, while achieving the primary goals of improving efficiency and saving space, it also reliably ensures the processing yield and quality consistency of the final denture product.

[0010] In a further preferred embodiment, the substrate is a semi-circular annular structure having an arc edge and a straight edge.

[0011] The advantages of the above solution are as follows: By specifically defining the substrate as a semi-circular ring structure, which combines an arc edge and a straight edge, this invention first optimizes the overall configuration of the fixture. Compared to the closed circular ring or hollow rectangular structure in the prior art, the semi-circular ring removes nearly half of the original solid part, allowing the fixture to retain the effective inner clamping part—the arc edge used to set the first loading slot—while significantly reducing its overall volume, weight, and material consumption. Given that the internal space of the dental prosthesis carving machine's working chamber is a strictly limited and precious resource, the fixture... The compact size directly increases the potential for accommodating a larger number of fixtures within the work chamber, or provides more ample operating space for the tool movement and cooling system, thereby improving the flexibility of equipment layout and overall operating efficiency. At the same time, the construction of the straight edge provides a stable and flat mounting reference for the outer clamping part, which helps ensure that the multiple second loading slots opened on it have a consistent and precise orientation, thereby simplifying the positioning and clamping process of the fixture, and further enhancing the path planning stability and machining accuracy of the engraving machine when performing high-speed machining on the outer blank.

[0012] In a further preferred embodiment, the inner clamping portion is located on the arc edge, and the first loading groove is formed on the arc edge.

[0013] The advantages of the above solution are as follows: By further confining the inner clamping part to the arc edge of the semi-circular ring and opening the first loading groove on this arc edge, the shape of the inner clamping part and the arc contour of the base body achieve a high degree of structural adaptation and spatial fit. Since the arc edge itself is the natural inner surface facing the central area, multiple first loading grooves can be naturally distributed in an array around the central area, thereby making full use of the inner space reserved by the semi-circular ring structure while ensuring the consistency and symmetry of the relative positional relationship between each blank and the central area. Given that the tool path of the dental prosthesis engraving machine is often based on... With a central reference for planning, this wraparound layout simplifies the motion algorithm when the tool processes the inner blank from different angles, reducing unnecessary idle movement and thus improving cutting efficiency and the smoothness of the motion trajectory at the microscopic level. At the same time, since the arc-shaped structure itself provides better rigidity than a right angle, placing the first loading groove here helps to enhance the local rigidity of the clamping part when subjected to cutting forces by utilizing the arc-shaped structural characteristics. This provides a more stable support foundation for the brittle glass-ceramic blank, ultimately contributing to improved machining accuracy and reduced risk of breakage, in addition to achieving the macroscopic benefits of structural compactness.

[0014] In a further preferred embodiment, the central region defined by the substrate is rectangular, and the inner clamping portion includes a first side clamping surface and a second side clamping surface located on two opposite sides of the rectangular region; the first loading groove includes a set of multiple slots disposed on the first side clamping surface and a set of multiple slots disposed on the second side clamping surface.

[0015] The advantages of the above solution are as follows: By specifically defining the central area as a rectangle and dividing the first loading slot into two groups with clamping surfaces respectively set on the two opposite sides of the rectangle, this utility model first creates a symmetrical and stable structure in terms of internal spatial layout. Since the opposite sides of the rectangle are parallel and of equal length, the clamping axes of the two groups of first loading slots are parallel and symmetrically distributed, thus forming a balanced support frame inside the fixture when it is installed on the dental prosthesis engraving machine. Given that the glass-ceramic blank will generate complex periodic cutting forces on the fixture under high-speed cutting, this symmetrical clamping structure helps to evenly distribute cutting vibration and stress on the two opposite sides of the substrate, effectively suppressing the torsional deformation and resonance phenomenon of the fixture during processing, thereby providing an extremely stable processing environment for brittle glass-ceramic blanks. This plays a key role in ensuring the dimensional tolerance and surface finish of high-precision engraving. At the same time, the rectangular structure is easier to precision process and position than the arc shape, which directly translates into higher manufacturing accuracy and repeatability of the fixture itself.

[0016] In a further preferred embodiment, the outer clamping portion is located outside the first side of the rectangular region; the fourth side of the rectangular region opposite to the first side is configured as a mounting reference surface for installation in conjunction with the rotary shaft clamping mechanism of the dental prosthesis carving machine.

[0017] The advantages of the above solution are as follows: By further precisely positioning the outer clamping part outside the first side of the rectangular area, and constructing the fourth side on the opposite side as the mounting reference surface, this utility model first achieves a clear division and optimization of functional areas from the perspective of system integration of the fixture; since the mounting reference surface is specifically designed to form a stable and reliable fit and fixation with the clamping mechanism of the dental prosthesis carving machine's rotating axis (such as the A-axis or B-axis), the positioning accuracy and connection rigidity of the fixture on the machine tool are fundamentally guaranteed; given that the fixture itself needs to withstand complex compound torques during multi-axis linkage carving, a flat and stable reference surface specifically for installation directly helps to effectively transfer cutting forces. The vibration and deformation of the fixture during dynamic processing are minimized and transmitted to the machine tool body, thus laying a solid foundation for high-precision and low-damage engraving of glass ceramic blanks. At the same time, since the clamping function (outer clamping part) and the machine tool interface function (mounting reference surface) are respectively arranged on opposite sides of the fixture, a high degree of integration of fixture functions and a highly compact structure are achieved. The blank capacity is increased by setting a second loading groove on the outer side of the first side, and the reference surface design of the fourth side ensures optimal cooperation with the machine tool. Ultimately, at the system level, an optimal layout of functional partitioning and non-interference is achieved, while taking into account the comprehensive technical effects of high loading capacity, high precision and high rigidity.

[0018] In a further preferred embodiment, a clamping groove is provided on the substrate, and a clamping pin that can move along its axial direction is provided in the clamping groove. The clamping pin is used to apply radial clamping force to the mounting post of the glass-ceramic blank.

[0019] The advantages of the above solution are as follows: By opening a clamping groove on the substrate and setting an axially movable clamping pin, this utility model first constructs a universal radial clamping mechanism independent of the specific shape of the billet; since the mechanism converts the axial movement of the pin into radial pressure on the surface of the mounting post, it can provide effective clamping force regardless of whether the mounting post is a simple cylinder or has an optimized groove, thus realizing the universality and flexibility of the clamping solution; given that providing radial constraint is the key to preventing the billet from falling out of the loading groove and resisting cutting torque, this basic clamping structure directly provides a stable and reliable core locking function for the fixture, laying the necessary structural foundation for all subsequent optimized low-stress clamping solutions for brittle materials.

[0020] In a further preferred embodiment, the outer periphery of the mounting post of the glass-ceramic blank is provided with at least one limiting groove, the limiting groove being used to accommodate the end of the clamping pin.

[0021] The advantages of the above solution are as follows: By setting a limiting groove on the mounting post of the blank and using it as the force application point for the clamping pin, this utility model optimizes the general radial clamping mechanism into a dedicated clamping solution with better anti-dislodgement and higher stability. Since the limiting groove provides a clear mechanical limiting structure for the end of the pin, the end of the pin is accommodated and restricted in the groove during the clamping process, thereby fundamentally eliminating the risk of axial slippage of the pin on a smooth cylindrical surface and greatly enhancing the reliability of clamping. Given that the dental prosthesis carving process involves high-speed rotation and multi-axis linkage, this groove-locking design directly translates into an effective constraint on the axial movement freedom of the blank, which, together with the radial clamping force, constitutes a more comprehensive spatial constraint, thus providing a key structural upgrade for resisting complex cutting forces and ensuring the ultimate stability of the processing process.

[0022] In a further preferred embodiment, the limiting groove is formed along the periphery of the mounting post, and its cross-section is arc-shaped.

[0023] The advantages of the above solution are as follows: By further defining the limiting groove as being opened along the periphery of the mounting column and having an arc-shaped cross-section, this utility model achieves the dual technical effects of circumferential full-area anti-detachment and optimal stress distribution while providing mechanical limiting. Because the limiting groove is continuously opened along the periphery, regardless of the angle at which the clamping pin rotates to contact the mounting column, its end can be stably accommodated within the groove, thus achieving 360-degree constraint on the axial movement of the blank without dead angles, greatly improving clamping reliability. Simultaneously, because the cross-section of the circumferential groove is optimized to be arc-shaped, its smooth and continuous curved surface can form a high-fit contact with the pin end, allowing the clamping force to be evenly distributed along the contact line, thereby completely avoiding stress concentration at the edges of rectangular or V-shaped grooves. Given that the breakage of glass-ceramic blanks during clamping mainly stems from localized stress concentration, this composite groove design with a circumferential ring and arc-shaped cross-section is extremely beneficial in ensuring ultimate clamping stability while minimizing contact stress, ultimately providing the optimal structural solution for achieving high-reliability, zero-damage clamping of brittle materials.

[0024] In a further preferred embodiment, the bottom of the first loading groove and / or the second loading groove is provided with a positioning protrusion for matching the positioning groove at the end of the glass-ceramic blank mounting column.

[0025] The advantages of the above solution are as follows: By setting a positioning protrusion at the bottom of the loading groove and cooperating with the positioning groove on the end face of the blank mounting post, this utility model first establishes a high-precision positioning reference for the circumferential angle of the blank; since the engagement of the protrusion and the groove can accurately define its circumferential direction in the initial stage of blank loading, the blank is already in the preset processing orientation before being subjected to the clamping force, thereby completely eliminating the processing reference error caused by the lack of constraint on the circumferential rotational freedom; given that the shape of the denture crown has a clear buccal and lingual and mesiodistal orientation, this pre-positioned, mechanical hard positioning directly ensures the consistency of the processing angle of each blank in mass production, thus providing a crucial prerequisite for the accurate placement and good function of the final denture in the oral cavity.

[0026] A dental prosthesis carving machine includes a glass-ceramic fixture for dental prosthesis carving as described above. Since the dental prosthesis carving machine incorporates all the technical features of the aforementioned glass-ceramic fixture for dental prosthesis carving, it also possesses all the technical effects of the aforementioned glass-ceramic fixture for dental prosthesis carving, and will not be elaborated further.

[0027] Compared with existing technologies, the glass-ceramic fixture for a dental prosthesis carving machine provided by this utility model achieves a fundamental shift from single-sided space utilization to double-sided space utilization by adding outer and inner clamping parts to coordinate the arrangement of loading slots. This design, on the one hand, doubles the total number of loading slots while maintaining the fixture's external dimensions, significantly increasing the amount of blank processed per batch and reducing downtime for material changes, thereby greatly improving equipment capacity and time utilization. On the other hand, it significantly reduces the fixture volume while maintaining the same loading quantity, achieving miniaturization and weight reduction, providing greater spatial flexibility for parallel processing of multiple fixtures or toolpath optimization within the work chamber. Simultaneously, dispersing the blanks in the spatially isolated inner and outer clamping parts effectively avoids interference and vibration coupling in the clamping mechanism, providing an independent and stable clamping environment for brittle glass-ceramic blanks, significantly reducing the risk of chipping and microcracks during processing, and reliably ensuring product yield and quality consistency while achieving efficient processing. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the prefabricated base assembly disclosed in CN218168931U.

[0029] Figure 2 This is a front view of the glass-ceramic fixture for a dental prosthesis carving machine provided by this utility model.

[0030] Figure 3 This is a perspective view of the glass-ceramic fixture for a dental prosthesis carving machine provided by this utility model.

[0031] Figure 4This is a cross-sectional view of the glass-ceramic fixture for a dental prosthesis carving machine provided by this utility model.

[0032] Figure 5 This is a longitudinal cross-sectional view of the glass-ceramic fixture for a dental prosthesis carving machine provided by this utility model.

[0033] Figure 6 This is a partial exploded view of the glass-ceramic fixture used in a dental prosthesis carving machine according to this utility model. Detailed Implementation

[0034] This utility model provides a glass-ceramic fixture for a dental prosthesis carving machine and a dental prosthesis carving machine. To make the purpose, technical solution and effects of this utility model clearer, the following describes this utility model in further detail with reference to the accompanying drawings and examples.

[0035] This utility model provides a glass-ceramic fixture for a dental prosthesis carving machine. Its core technology lies in improving the fixture's space utilization efficiency and clamping capacity through structural innovation, enabling it to simultaneously achieve high-precision multi-station machining within a limited space. The fixture includes a base 100, such as... Figure 2 As shown, the substrate 100 defines a central region 200, as Figures 2 to 4 As shown, the central area 200 can be designed as a hollow space to avoid obstructions, or it can be equipped with local reinforcing ribs to enhance the overall rigidity, so as to adapt to different structural strength and support requirements.

[0036] In terms of overall structural layout, the base 100 has an inner clamping part 110 (e.g., ...) on the side facing the central region 200. Figure 2 and Figure 3 As shown). Multiple first loading slots 111 are provided on the inner clamping part 110 (as shown). Figure 4 As shown), it is used for precise clamping of the glass-ceramic blank 300. In contrast, an outer clamping portion 120 (as shown) is provided on the side of the substrate 100 facing away from the central region 200. Figure 2 and Figure 3 As shown, it is understandable that Figure 2 The dotted line between the outer clamping part 120 and the inner clamping part 110 shown is not real, but is constructed by this utility model to accurately describe the positional relationship between the two. The outer clamping part 120 is also provided with a plurality of second loading slots 121 (e.g., Figure 4 (As shown). The arrangement of clamping sections on both the inner and outer sides breaks the limitation of traditional fixtures that only utilize the inner space, allowing the clamping function to be expanded in three dimensions, thus simultaneously improving the number of clamps and the space utilization rate.

[0037] The above design concept can be realized through various specific structural forms: In one preferred embodiment, the base 100 can be a semi-circular ring structure. The curved edges of this shape naturally form the inner clamping portion 110, and the straight edges form the outer clamping portion 120, resulting in a compact overall structure with balanced mechanical distribution. In another preferred embodiment, the base 100 can be a rectangular frame structure, with opposite sides of the inner frame serving as the inner clamping portion 110, and adjacent or single-sided sides of the outer frame serving as the outer clamping portion 120, facilitating matrix-style slotting. For irregularly shaped machine tool spaces, polygonal or irregularly shaped frame structures can also be used, as long as they have two clamping surfaces facing and away from the central area 200, respectively, to achieve double-sided clamping functionality.

[0038] Preferably, the arrangement of the loading slots can be flexibly designed according to the actual processing technology. For example, a linear array, an arc-shaped surrounding array, or a staggered distribution can be used. The number of slots can be determined based on the overall size of the fixture and the desired processing efficiency, thereby maximizing the loading density while ensuring structural stability. Through the above structural arrangement, the fixture can accommodate more blank units in a compact space, meeting the needs of batch engraving processing.

[0039] In a preferred embodiment, the base 100 specifically adopts a semi-circular annular structure. This structure is defined by both curved and straight edges, forming a typical asymmetrical geometric configuration. The curved edges naturally become an ideal carrier for the inner clamping portion 110, while the straight edges provide a good support reference for setting the outer clamping portion 120. This layout not only improves space utilization but also allows the fixture to form a more reasonable stiffness distribution in the direction of force, balancing structural compactness and processing stability.

[0040] In this structure, multiple first loading grooves 111 are arranged along the curvature direction on the arc-shaped edge, forming an arc-shaped array surrounding the central region 200. This arrangement allows multiple glass-ceramic blanks 300 (such as...) to be loaded. Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the toolpath is radially distributed with the central region of 200 as the reference, allowing for more flexible toolpath planning and a wider variety of machining angles. During machining, the cutting force is dispersed along the arc, resulting in less overall vibration and higher fixture stability. Simultaneously, the arc-shaped structure itself avoids interference between the machining tool and the fixture edge, facilitating efficient tool movement within a limited machining space.

[0041] The outer clamping part 120 is located on a straight edge, and the second loading slots 121 are arranged in a straight array. The straight edge has high rigidity and a clear planar reference, which can ensure the repeatability of the clamping position. This straight edge can also serve as a mounting reference surface for the fixture on the machine tool worktable, facilitating quick positioning and replacement. Through the combination of arc-shaped and straight-line structures, the inner and outer clamping parts complement each other, achieving optimal utilization of structural space and maintaining excellent vibration resistance during high-speed machining.

[0042] Furthermore, this semi-circular design offers good spatial adaptability. Its straight edges facilitate fixing and positioning, while the curved sections provide more clamping angle options, allowing for dense arrangement of fixtures within the machine tool cabin. The overall geometry is regular and easy to install, making it particularly suitable for multi-station machining scenarios on small and medium-sized engraving machines.

[0043] In another embodiment, the central region 200 is designed as a rectangular space. This structure makes the distribution of clamping surfaces more regular, facilitating a symmetrical mechanical layout. Opposite first and second clamping surfaces (not shown, located on either side of the central region 200) are provided on the inner side of the base 100, each clamping surface having several first loading grooves 111. The two clamping surfaces are arranged symmetrically to each other, forming a mutually supporting structural system that ensures balanced transmission of clamping force and higher overall rigidity.

[0044] In this rectangular structure, the outer clamping part 120 is located on one side of the outer edge of the rectangle, forming an independent external clamping area. The opposite side is designed as a mounting reference surface for precise engagement with the clamping mechanism of the dental prosthesis engraving machine. This layout ensures clear positioning and stable fixation during installation, avoiding interference between the clamping function and the machine tool interface, and achieving clear functional zoning. The rectangular shape also facilitates modular combination of fixtures, allowing for array-style arrangement within the work chamber. This solution is suitable for batch, high-density multi-material processing environments.

[0045] In addition, the rectangular base 100 structure can also reserve functional modules such as cooling channels and sensor interfaces, which can be used in conjunction with intelligent processing systems to realize extended functions such as temperature control and monitoring, and has good scalability.

[0046] In a further improvement, the substrate 100 is provided with a clamping groove 311 (e.g., Figure 5 As shown, a clamping pin that can move axially is arranged in the groove. This pin moves axially under the action of the drive mechanism, and its end contacts the outer surface of the blank mounting post. Through geometric transformation, the axial thrust is converted into radial clamping force. Compared with traditional axial clamping methods, this structure can form a uniform circumferential force on the blank, avoiding concentrated pressure on the end face and thus preventing cracking. It is particularly suitable for brittle materials such as glass and ceramics.

[0047] To further enhance clamping stability, a limiting groove is provided on the outer periphery of the billet mounting post. The shape of the limiting groove matches the end of the clamping pin, preventing the pin from sliding on the cylindrical surface. The limiting groove also provides a clear positioning reference for the pin, ensuring stability even under high-speed vibration conditions. This structure allows for sufficient holding torque under relatively low clamping force, thereby reducing the stress risk to brittle materials.

[0048] Preferably, the limiting groove is a continuous annular groove along the circumference of the mounting post, with an arc-shaped cross-section. The annular design ensures that the billet remains in close contact with the pin even when rotated to any angle; the arc-shaped cross-section disperses compressive stress, preventing stress concentration at the groove edge. This stress distribution characteristic significantly reduces the probability of microcrack formation and extends the billet's service life. Simultaneously, the contact area between the arc-shaped groove surface and the end of the cylindrical pin increases the contact area, reducing unit pressure and achieving stable yet gentle clamping. The clamping groove 311, the clamping pin, and the limiting groove form a complete force transmission system. This system combines rigid constraint with flexible buffering characteristics, enabling the clamping mechanism to maintain sufficient clamping force while reducing the risk of damage to brittle materials, providing reliable support for high-precision machining.

[0049] Based on the aforementioned clamping system, to further improve positioning accuracy, the bottom of the first loading groove 111 and / or the second loading groove 121 is provided with a positioning structure. The positioning structure includes a positioning protrusion 130 (e.g., ...) that mates with the end of the blank mounting post. Figure 6 As shown). When the billet is loaded into the loading slot, the positioning protrusion 130 first embeds into the corresponding positioning slot 320 (as shown). Figure 6 As shown, this structure enables precise positioning during the initial clamping stage. It limits the circumferential position of the blank before the clamping action, preventing rotational displacement during the clamping process.

[0050] The positioning protrusion 130 can be cylindrical, prismatic, or other geometric shapes, and the corresponding blank positioning groove 320 adopts a matching structure to achieve a unique assembly direction. The positioning structure and the radial clamping system work together, with the former responsible for restricting the circumferential degree of freedom and the latter providing radial constraint force. Together, they form a complete six-degree-of-freedom constraint system, thereby significantly improving the clamping accuracy and repeatability reliability of the fixture.

[0051] Preferably, the positioning protrusion 130 has a rectangular structure. When the rectangular positioning protrusion 130 mates with the corresponding rectangular groove on the blank, it can form a surface-to-surface limiting contact at the moment of insertion, which not only effectively prevents the blank from rotating and shifting, but also provides a more obvious guiding effect during the positioning process. Since the planar reference of the rectangular structure is clear and the clamping direction is unique, it can avoid the deviation of the machining surface caused by assembly angle error. At the same time, the machining process of the rectangular positioning protrusion 130 is simple, and it is easy to integrally form by milling or wire cutting, ensuring positioning accuracy and reducing manufacturing costs.

[0052] Preferably, the positioning protrusion 130 can be integrally machined with the base 100 to ensure positional accuracy and structural strength. The positioning groove 320 on the blank can be formed in one step during the blank preparation stage without adding extra costs. This structure improves accuracy and stability while maintaining good processing economy, making it suitable for mass production and intelligent processing environments.

[0053] This utility model also provides a dental prosthesis carving machine, which includes the glass-ceramic fixture for dental prosthesis carving machines described above. Since the dental prosthesis carving machine incorporates all the technical features of the aforementioned glass-ceramic fixture for dental prosthesis carving machines, it also possesses all the technical effects of the aforementioned glass-ceramic fixture for dental prosthesis carving machines, and will not be elaborated further.

[0054] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some embodiments, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. Similarly, it should be understood that, in order to streamline the present invention and aid in understanding one or more of the various aspects of the invention, features of the embodiments of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof in the foregoing description of exemplary embodiments of the present invention. However, this disclosed approach should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, aspects of the invention lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the present invention.

[0055] Those skilled in the art will understand that the modules in the processing apparatus of the embodiments can be adaptively modified and placed in one or more processing apparatuses different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be employed to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or processing apparatus so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0056] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this invention and form different embodiments. For example, any of the claimed embodiments can be used in any combination.

[0057] It should be noted that the above embodiments are illustrative of the present invention and not restrictive of it, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A glass-ceramic fixture for a dental prosthesis carving machine, comprising a base defining a central region, an inner clamping portion provided on one side of the base facing the central region, the inner clamping portion having a plurality of first loading grooves for clamping glass-ceramic blanks, characterized in that, The substrate is also provided with an outer clamping part on the side opposite to the central region, and the outer clamping part is provided with a plurality of second loading grooves for clamping glass ceramic blanks.

2. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 1, characterized in that, The substrate is a semi-circular ring structure with an arc edge and a straight edge.

3. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 2, characterized in that, The inner clamping part is located on the arc edge, and the first loading groove is formed on the arc edge.

4. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 1, characterized in that, The central region defined by the substrate is rectangular, and the inner clamping part includes a first side clamping surface and a second side clamping surface located on two opposite sides of the rectangular region; the first loading groove includes a set of multiple slots disposed on the first side clamping surface and a set of multiple slots disposed on the second side clamping surface.

5. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 4, characterized in that, The outer clamping part is located outside the first side of the rectangular area; the fourth side of the rectangular area opposite to the first side is constructed as an installation reference surface for installation in conjunction with the rotary shaft clamping mechanism of the dental prosthesis carving machine.

6. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 1, characterized in that, A clamping groove is provided on the substrate, and a clamping pin that can move along its axial direction is provided in the clamping groove. The clamping pin is used to apply radial clamping force to the mounting post of the glass-ceramic blank.

7. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 6, characterized in that, The mounting post of the glass-ceramic blank is provided with at least one limiting groove on its outer periphery, the limiting groove being used to accommodate the end of the clamping pin.

8. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 7, characterized in that, The limiting groove is opened along the periphery of the mounting column, and its cross-section is arc-shaped.

9. The glass-ceramic fixture for a dental prosthesis carving machine according to claim 1, characterized in that, The bottom of the first loading groove and / or the second loading groove is provided with a positioning protrusion for matching the positioning groove at the end of the glass-ceramic blank mounting column.

10. A dental prosthesis carving machine, characterized in that, The dental prosthesis carving machine includes a glass-ceramic fixture for a dental prosthesis carving machine as described in any one of claims 1 to 9.

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