False tooth blank clamp

Abstract

The utility model discloses a false tooth blank clamp which comprises a clamping seat, a clamping block detachably connected to the clamping seat and a reducing sleeve arranged between the clamping block and the clamping seat in a clamped mode, an inner hole of the reducing sleeve is matched with a false tooth blank to be machined, and the reducing sleeve is provided with a bonding part used for fixing the false tooth blank to be machined. According to the false tooth blank clamp provided by the utility model, the clamping of the false tooth blank is completed through the structural form of additionally arranging the reducing sleeve, during the use, the false tooth blank can be firstly adhered and fixed in the reducing sleeve, and then the reducing sleeve is clamped and fixedly mounted on the clamping seat, so that an annular clamping groove part does not need to be arranged on the false tooth blank; the reducing sleeve can form part of cutter relieving allowance for machining of a machining center cutter, interference between the cutter and the clamping seat or the clamping block is avoided, additional annular clamping groove parts do not need to be arranged on the false tooth blank, the radial size of the false tooth blank can be reduced, and therefore the utilization rate of the false tooth blank is effectively increased, use of expensive materials is reduced, and production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of denture processing, in particular to a fixture for denture blanks. Background Art

[0002] Denture blanks are generally prepared from semi-sintered zirconia materials, and the common blank structure is a disc-shaped structure. In recent years, with the continuous development of the technology of CNC machining centers, more and more manufacturers use machining centers to complete the processing of dentures. Before processing, it is necessary to clamp the denture blank onto the equipment. At present, for the fixture of disc-shaped denture blanks, it is usually necessary to first machine annular clamping grooves along the outer circle at both axial ends of the denture blank, and then the fixture is clamped on the annular step for processing. Such a structure can ensure the rapid positioning and stable clamping of the denture blank, but the blank in the annular clamping groove area belongs to the ineffective machining area. Coupled with the need to reserve enough tool clearance space in the circumferential direction of the denture blank, this results in a large number of ineffective areas in the denture blank and a low utilization rate of the blank.

[0003] Therefore, it is necessary to develop and design a new fixture for denture blanks, which is required to improve the utilization rate of the blank when machining denture blanks on a machining center, thereby saving manufacturing costs. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a fixture for denture blanks, which can improve the utilization rate of the blank when machining denture blanks on a machining center, thereby saving manufacturing costs.

[0005] Compared with the prior art, the beneficial effects of the utility model are as follows: A fixture for denture blanks includes a clamp base, a clamp block detachably connected to the clamp base, and an adapter sleeve disposed between the clamp block and the clamp base in a clamped manner. The inner hole of the adapter sleeve is adapted to the denture blank to be machined and is provided with an adhesive part for fixing the denture blank to be machined.

[0006] Further, one end of the adapter sleeve is provided with an axial positioning structure for axially positioning the denture blank to be machined.

[0007] Further, the axial positioning structure is an inwardly protruding annular positioning step.

[0008] Further, an arc-shaped clamping plate extending circumferentially is provided on the outer peripheral surface of the adapter sleeve, and the arc-shaped clamping plate is clamped and fixed between the clamp block and the clamp base.

[0009] Further, the clamp base is provided with an arc-shaped positioning step conforming to the arc-shaped clamping plate, and the arc-shaped clamping plate is disposed at the arc-shaped positioning step.

[0010] Further, a radial positioning groove is provided on the outer peripheral surface of the arc-shaped clamping plate, and a radial positioning protrusion part clamped in the radial positioning groove is provided on the arc-shaped positioning step.

[0011] Further, the clamping block is an arc-shaped clamping block, and the arc-shaped clamping block is pressed on the arc-shaped clamping plate.

[0012] Further, a first tool avoidance chamfer is provided at one end of the arc-shaped clamping block away from the arc-shaped clamping plate, and a second tool avoidance chamfer is provided at one end of the clamping seat away from the arc-shaped clamping plate.

[0013] Further, the adapter sleeve is a plastic part.

[0014] Further, the adapter sleeve is a transparent plastic part.

[0015] The denture blank fixture provided by the present utility model completes the clamping of the denture blank through the structural form of adding an adapter sleeve. During use, the denture blank can be adhesively fixed in the adapter sleeve first, and then the adapter sleeve is clamped and fixedly installed on the clamping seat. There is no need to provide an annular clamping groove on the denture blank. The adapter sleeve can form a tool clearance allowance for the machining center tool to avoid interference between the tool and the clamping seat or the clamping block. There is no need to provide an additional annular clamping groove on the denture blank, so that the radial dimension of the denture blank can be reduced, thereby effectively improving the utilization rate of the denture blank material, reducing the use of more expensive materials, and saving production costs.

[0016] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. Brief Description of the Drawings

[0017] Figure 1 Overall structural schematic diagram of the present utility model

[0018] Figure 2 Cross-sectional structural schematic diagram of the present utility model

[0019] Figure 3 Exploded structural schematic diagram of the present utility model

[0020] Figure 4 Structural schematic diagram of the adapter sleeve

[0021] Reference numerals: 1 - clamping seat; 101 - arc-shaped positioning step; 101a - radial positioning protrusion; 2 - clamping block; 201 - first tool avoidance chamfer; 3 - adapter sleeve; 301 - inner hole; 302 - axial positioning structure; 303 - arc-shaped clamping plate; 303a - radial positioning groove. Detailed Description of the Embodiments

[0022] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. All details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments are only used to illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0023] Please refer to Figures 1-4 , in this embodiment, a denture blank fixture is disclosed, which includes a clamping seat 1, a clamping block 2 detachably connected to the clamping seat 1, and an adapter sleeve 3 disposed between the clamping block 2 and the clamping seat 1 in a clamped manner. The inner hole 301 of the adapter sleeve 3 is adapted to the denture blank to be processed and is provided with an adhesive portion for fixing the denture blank to be processed; specifically, the entire inner surface of the inner hole 301 here can be used as the adhesive portion, that is, the adhesive surface. The denture blank can be fixedly installed in the adapter sleeve 3 by means of gluing or the like without setting an additional clamping structure on the denture blank. The installation of the adapter sleeve 3 sleeved on the denture blank can ensure the stable installation of the denture blank and the reliability of processing; of course, it can be understood that the clamping seat 1 and the clamping block 2 are similar to the structures of traditional denture blank fixtures. The clamping seat 1 is a semi-open structure. During the processing, the flipping and moving of the clamping seat 1 in cooperation with the multi-axis movement of the tool can complete the multi-angle processing of both sides of the denture blank, which will not be elaborated here; in addition, the clamping block 2 and the clamping seat 1 can be detachably connected by bolts, which will not be elaborated here;

[0024] For the denture blank fixture in the above structural design, compared with the traditional clamping method, the clamping of the denture blank is completed by adding the structural form of the adapter sleeve 3, that is, the clamping block 2 and the clamping seat 1 do not directly clamp the denture blank. During use, the denture blank can be adhesively fixed in the adapter sleeve 3 first, and then the adapter sleeve 3 is clamped and fixedly installed on the clamping seat 1. There is no need to set structures such as an annular clamping groove on the denture blank. The adapter sleeve 3 can form a tool clearance for the machining center tool, that is, the setting of the adapter sleeve 3 is equivalent to increasing the radial dimension of the denture blank, which can avoid interference between the tool and the clamping seat or the clamping block when machining the edge of the denture blank. There is no need to set an additional annular clamping groove on the denture blank, so that the radial dimension of the denture blank can be reduced, thereby effectively improving the utilization rate of the denture blank billet, reducing the use of more expensive materials, and saving production costs.

[0025] In this embodiment, an axial positioning structure 302 for axially positioning the denture blank to be processed is provided at one end of the adapter sleeve 3. Theoretically, the form of the axial positioning structure 302 is not limited, and preferably an annular positioning step structure is adopted. By providing the axial positioning structure 302, it is beneficial to ensure the accurate positioning and installation of the denture blank and the adapter sleeve 3, and at the same time, it is also beneficial to improve the reliability of the connection structure.

[0026] In this embodiment, the axial positioning structure 302 is an inwardly protruding annular positioning step. During use, one end face of the denture blank can abut against the annular positioning step. This structural design is simple, beneficial to processing, has a good limiting effect on the denture blank, and has good structural strength. At the same time, it can also be used as a bonding connection part, which is beneficial to further improve the connection reliability of the denture blank.

[0027] In this embodiment, an arc-shaped clamping plate 303 extending circumferentially is provided on the outer peripheral surface of the adapter sleeve 3, and the arc-shaped clamping plate 303 is clamped and fixed between the clamping block 2 and the clamping seat 1. The arc-shaped clamping plate 303 has good structural strength, a reliable clamping structure, is beneficial to processing, and is beneficial to the overall lightweight design.

[0028] In this embodiment, an arc-shaped positioning step 101 conforming to the arc-shaped clamping plate 303 is provided on the clamping seat 1, and the arc-shaped clamping plate 303 is arranged at the arc-shaped positioning step 101. By providing the arc-shaped positioning step 101, it is beneficial to the quick installation and positioning of the adapter sleeve 3, and it is also beneficial to further improve the installation reliability of the adapter sleeve 3.

[0029] In this embodiment, a radial positioning groove 303a is provided on the outer peripheral surface of the arc-shaped clamping plate 303, and a radial positioning protrusion 101a clamped in the radial positioning groove 303a is provided on the arc-shaped positioning step 101. This structural design is simple, beneficial to realizing the quick installation and positioning of the adapter sleeve 3. At the same time, it can prevent the adapter sleeve 3 from rotating after installation, which is beneficial to further improving the use reliability of the overall structure.

[0030] In this embodiment, the clamping block 2 is an arc-shaped clamping block, and the arc-shaped clamping block is pressed against the arc-shaped clamping plate 303. The arc-shaped clamping block is beneficial to the overall lightweight design, and at the same time, the pressing of the arc-shaped clamping plate 303 is reliable, which is beneficial to further improving the installation reliability of the overall structure.

[0031] In this embodiment, a first tool-avoiding chamfer 201 is provided at one end of the arc-shaped clamping block away from the arc-shaped clamping plate 303, and a second tool-avoiding chamfer 102 is provided at one end of the clamping seat 1 away from the arc-shaped clamping plate 303. By providing the tool-avoiding chamfer structure, when the machining tool processes the corresponding surface of the denture blank, it is beneficial to complete the machining of the denture blank at a larger inclination angle, avoid interference with the clamping seat 1 and the clamping block 2, and thus is beneficial to further saving the material of the denture blank and improving the material utilization rate.

[0032] In this embodiment, the adapter sleeve 3 is a plastic part. The plastic part has a good bonding effect with the denture blank, which is beneficial to ensuring the connection reliability of the denture blank and is also beneficial to lightweight design. At the same time, the plastic part is beneficial to improving the use safety. Even if the tool is accidentally damaged by a collision, the tool will not be damaged.

[0033] In this embodiment, the adapter sleeve 3 is a transparent plastic part. The specific material of the transparent plastic part is not limited, such as PMMA, PC materials, etc. By using a transparent plastic part, it is beneficial to observe whether the denture blank is properly installed on the adapter sleeve 3, improving the use convenience and processing accuracy.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A denture embryo fixture, characterized in that: It includes a clamping base (1), a clamping block (2) detachably connected to the clamping base (1), and an adapter sleeve (3) arranged between the clamping block (2) and the clamping base (1) in a clamped manner. The inner hole (301) of the adapter sleeve (3) is adapted to the denture blank to be processed and is provided with an adhesive part for fixing the denture blank to be processed.

2. The denture blank fixture according to claim 1, wherein: One end of the adapter sleeve (3) is provided with an axial positioning structure (302) for axially positioning the denture blank to be processed.

3. The denture blank fixture according to claim 2, wherein: The axial positioning structure (302) is an inwardly protruding annular positioning step.

4. The denture blank fixture according to claim 1, wherein: An arc-shaped clamping plate (303) extending circumferentially is arranged on the outer peripheral surface of the adapter sleeve (3), and the arc-shaped clamping plate (303) is clamped and fixed between the clamping block (2) and the clamping base (1).

5. The denture blank fixture according to claim 4, characterized in that: An arc-shaped positioning step (101) conforming to the arc-shaped clamping plate (303) is arranged on the clamping base (1), and the arc-shaped clamping plate (303) is arranged at the arc-shaped positioning step (101).

6. The denture blank fixture according to claim 5, wherein: A radial positioning groove (303a) is arranged on the outer peripheral surface of the arc-shaped clamping plate (303), and a radial positioning protrusion (101a) clamped in the radial positioning groove (303a) is arranged on the arc-shaped positioning step (101).

7. The denture blank fixture according to claim 4, characterized in that: The clamping block (2) is an arc-shaped clamping block, and the arc-shaped clamping block is pressed on the arc-shaped clamping plate (303).

8. The denture blank fixture according to claim 7, wherein: A first tool-avoiding chamfer (201) is arranged at one end of the arc-shaped clamping block away from the arc-shaped clamping plate (303), and a second tool-avoiding chamfer (102) is arranged at one end of the clamping base (1) away from the arc-shaped clamping plate (303).

9. The denture blank fixture according to claim 1, wherein: The adapter sleeve (3) is a plastic part.

10. The denture blank fixture according to claim 9, characterized in that: The adapter sleeve (3) is a transparent plastic part.

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