All-ceramic false tooth grinding system and false tooth preparation method thereof

Abstract

The invention relates to the technical field of all-ceramic false tooth grinding, and discloses an all-ceramic false tooth grinding system and a false tooth preparation method thereof.The all-ceramic false tooth grinding system comprises a grinding unit, a transmission unit and a rotating unit, the grinding unit comprises a grinding assembly, and a first circular containing barrel and a second circular containing barrel are arranged at the bottom of the grinding assembly; all-ceramic false teeth are placed in inner cavities of the first circular placement barrel and the second circular placement barrel, and the grinding assembly is used for grinding the placed all-ceramic false teeth; the rotating unit comprises two rotating shafts. According to the device, the driving assembly drives the first circular placement barrel, the second circular placement barrel and the rotating unit to rotate by one circle, and after one circle of rotation is completed, the driving assembly can drive the ejector rod to unlock the rotating unit, so that the rotating unit is driven by the rack to rotate by 180 degrees; therefore, the surfaces of the placed false teeth can be changed, the false teeth can be ground conveniently through the grinding assembly, and manual surface changing is not needed every time when the surfaces are changed.

Description

Technical Field

[0001] The present invention belongs to the technical field of all-ceramic denture grinding, and specifically relates to an all-ceramic denture grinding system and a method for preparing dentures thereof. Background Art

[0002] With the improvement of people's living standards and the enhancement of oral health awareness, the demand for denture restoration is increasing day by day. Not only is it required that dentures can restore the basic chewing function of teeth, but also higher standards are put forward for their aesthetics, biocompatibility and service life. All-ceramic dentures have been widely used in the field of oral restoration due to their excellent aesthetic performance, similar color and transparency to natural teeth, and good biocompatibility, which will not cause adverse reactions such as gingival allergy and discoloration.

[0003] At present, with the booming development of digital technology, computer-aided design (CAD) and computer-aided manufacturing (CAM) have gradually penetrated into the field of oral restoration. However, the existing CAD / CAM systems applied to the preparation of all-ceramic dentures are still not perfect.

[0004] When the existing all-ceramic dentures are ground, during the grinding process by mechanical equipment, when one side is ground, it is necessary to manually change the surface. Since there are many surfaces of all-ceramic dentures, it is rather troublesome to perform manual surface change every time.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: An all-ceramic denture grinding system includes a grinding unit, a transmission unit and a rotation unit. The grinding unit includes a grinding assembly. The bottom of the grinding assembly is provided with a first circular placement cylinder and a second circular placement cylinder. An all-ceramic denture is placed in the inner cavities of the first circular placement cylinder and the second circular placement cylinder. The grinding assembly is used for grinding the placed all-ceramic denture; The rotation unit includes two rotating shafts. The two rotating shafts respectively pass through the first circular placement cylinder and the second circular placement cylinder movably, and fixed positioning plates are arranged at the opposite ends of the two rotating shafts. The fixed positioning plates are used for positioning the placed all-ceramic denture; The transmission unit includes a driving assembly. The driving assembly is used for driving the rotating shafts to unlock, and the driving assembly is also used for driving the rotating shafts to rotate, and the driving assembly is also used for driving the first circular placement cylinder and the second circular placement cylinder to rotate.

[0007] As a preferred embodiment of the present invention, a hydraulic cylinder is provided above the grinding assembly. Above the hydraulic cylinder, there is a top plate. Around the bottom of the top plate, there are support legs. At the bottom of the four support legs, there is a placement plate. The placement plate is arranged on the workbench. Two circular notches are formed on the placement plate, and a first circular placement cylinder and a second circular placement cylinder are respectively rotatably arranged in the inner cavities of the circular notches. Two mutually symmetrical rectangular notches are also formed on the placement plate. Storage boxes are placed in the inner cavities of the first circular placement cylinder and the second circular placement cylinder respectively.

[0008] As a preferred embodiment of the present invention, the driving assembly includes a servo motor. The servo motor is arranged in the inner cavity of the workbench. A rotating rod is fixedly installed at the output end of the servo motor. A lower thread groove, a guiding chute and an upper thread groove are formed on the rotating rod. The lower thread groove, the guiding chute and the upper thread groove communicate with each other. A ball is rollingly arranged on the lower thread groove, and the ball also fits into the guiding chute and the upper thread groove respectively.

[0009] As a preferred embodiment of the present invention, a moving sleeve is arranged on the side wall of the ball. The moving sleeve is sleeved on the rotating rod. Two mutually symmetrical guiding rods movably penetrate through the moving sleeve. The bottoms of the two guiding rods are arranged at the bottom of the inner cavity of the workbench.

[0010] As a preferred embodiment of the present invention, a first fixing plate and a second fixing plate are respectively arranged on the side wall of the moving sleeve. The first fixing plate and the second fixing plate are staggered and symmetrical. A connecting plate is also arranged at the opposite ends of the first fixing plate and the second fixing plate. Sliding mechanisms are arranged on the two connecting plates. The sliding mechanism includes a sliding groove. The sliding groove is formed on one side wall of the connecting plate. Two mutually symmetrical sliding blocks are slidably arranged in the inner cavity of the sliding groove. Push rods are respectively arranged at one ends of the two sliding blocks.

[0011] As a preferred embodiment of the present invention, two mutually symmetrical special-shaped chutes are formed on the opposite side walls of the inner cavity of the workbench. Moving sliding rods are slidably arranged in the inner cavities of the four special-shaped chutes. The four moving sliding rods are symmetrical in pairs, and one ends are respectively arranged on the push rods.

[0012] As a preferred embodiment of the present invention, racks are fixedly installed above the first fixing plate and the second fixing plate respectively. Above the two racks, a driving gear is provided. The two driving gears are respectively meshed with the racks. The two driving gears are arranged on a rotating shaft. Plugging holes are respectively formed on the two rotating shafts. T-shaped plugging rods are respectively plugged into the two plugging holes. Above the two T-shaped plugging rods, two symmetrically arranged elastic telescopic rods are respectively provided. Between the upper parts of the four elastic telescopic rods in pairs, L-shaped mounting blocks are provided. The two L-shaped mounting blocks are respectively rotatably arranged in the inner cavity of the workbench. On the opposite side walls of the two L-shaped mounting blocks, a rotating shaft is rotatably arranged. The bottoms of the two racks are both in a C shape.

[0013] As a preferred embodiment of the present invention, a half gear is fixedly installed above the rotating rod. A first gear and a second gear are meshed on both sides of the half gear. Rotating rods are fixedly installed above the first gear and the second gear. The upper ends of the two rotating rods are respectively arranged at the bottoms of the first circular placing cylinder and the second circular placing cylinder.

[0014] As a preferred embodiment of the present invention, circular cylinders are arranged on one side wall of the inner cavities of the first circular placing cylinder and the second circular placing cylinder respectively. The two circular cylinders are symmetric to each other. Circular plugging rods are respectively plugged into the inner cavities of the two circular cylinders. Positioning plates are arranged at the opposite ends of the two circular plugging rods. Springs are arranged at the opposite ends of the two circular plugging rods, and the other ends of the springs are arranged on the inner walls of the circular cylinders.

[0015] A method for preparing a denture is as follows: Step 1: First, place the dentures to be prepared in the inner cavities of the first circular placing cylinder and the second circular placing cylinder respectively. When the placement is completed, start the hydraulic cylinder to drive the grinding assembly to move downward. Under the specific programming program in the grinding assembly, the dentures placed in the inner cavities of the first circular placing cylinder and the second circular placing cylinder can be ground. Step 2: At the same time, start the driving assembly, so that the driving assembly can drive the first circular placing cylinder and the second circular placing cylinder to rotate progressively. Therefore, it can ensure that the grinding assembly grinds the peripheries of the dentures placed in the first circular placing cylinder and the second circular placing cylinder. Step 3: At the same time, when the peripheries are ground, at this time, the first circular placing cylinder and the second circular placing cylinder rotate to the initial state. When the driving assembly continues to rotate a quarter of a circle at this time, the ejector rod can eject the T-shaped plugging rod out of the rotating shaft. And when the T-shaped plugging rod is ejected out of the rotating shaft, at this time, the rack will be meshed with the driving gear. Therefore, the rotating shaft can be rotated, so that the placed denture can be turned over for grinding. Step 4: When the grinding is completed, reverse the operation of the driving component, so as to ensure that the powder generated during the grinding of the denture falls onto the storage box.

[0016] The present invention has the following beneficial effects compared with the prior art: In the present invention, the driving component drives the first circular placement cylinder, the second circular placement cylinder and the rotation unit as a whole to rotate one circle. When one circle is rotated, the driving component can drive the ejector rod to unlock the rotation unit, and then drive the rotation unit to rotate 180 degrees through the rack, so as to change the surface of the placed denture, making it more convenient to grind the denture through the grinding component, without the need for manual surface change every time, reducing the number of manual surface changes.

[0017] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Description of the Drawings

[0018] In the drawings: Figure 1 is a three-dimensional schematic diagram of a monolithic denture grinding system; Figure 2 is a top view schematic diagram above the workbench of a monolithic denture grinding system; Figure 3 is a cross-sectional schematic diagram of the workbench of a monolithic denture grinding system; Figure 4 is a bottom-up cross-sectional schematic diagram of the workbench of a monolithic denture grinding system; Figure 5 is a schematic diagram of the inner cavity of the workbench of a monolithic denture grinding system; Figure 6 is a cross-sectional schematic diagram of the first circular placement cylinder of a monolithic denture grinding system; Figure 7 is a monolithic denture grinding system Figure 6 magnified schematic diagram at A in; Figure 8 is a monolithic denture grinding system Figure 6 magnified schematic diagram at B in; Figure 9 is a schematic diagram of the special-shaped sliding groove of a monolithic denture grinding system.

[0019] In the figure: 100, grinding unit; 101, workbench; 1011, placement plate; 1012, support leg; 1013, top plate; 1014, rectangular notch; 102, hydraulic cylinder; 1021, grinding component; 103, first circular placement cylinder; 1031, second circular placement cylinder; 104, storage box; 105, circular cylinder; 1051, circular insertion rod; 1052, positioning plate; 1053, fixed positioning plate; 200. Transmission unit; 201. Servo motor; 2011. Rotating rod; 2012. Moving sleeve; 2013. Lower thread groove; 2014. Guide chute; 2015. Upper thread groove; 2016. Ball; 2017. Guide rod; 202. Half gear; 2021. First gear; 2022. Second gear; 2023. Rotating rod; 203. First fixing plate; 2031. Connecting plate; 2032. Sliding groove; 2033. Sliding block; 2034. Thrust rod; 2035. Second fixing plate; 204. Special-shaped chute; 2041. Moving slide bar 300. Rotating unit; 301. Rack; 3011. Driving gear; 3012. Rotating shaft; 3013. Insertion hole; 3014. L-shaped mounting block; 302. T-shaped insertion rod; 3021. Elastic telescopic rod Detailed implementation method

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Embodiment 1: As Figures 1 to 9 shown, a full-ceramic denture grinding system includes a grinding unit 100, a transmission unit 200 and a rotating unit 300. The grinding unit 100 includes a grinding assembly 1021. A first circular placement cylinder 103 and a second circular placement cylinder 1031 are provided at the bottom of the grinding assembly 1021. A full-ceramic denture is placed in the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031. The grinding assembly 1021 is used to grind the placed full-ceramic denture; the rotating unit 300 includes two rotating shafts 3012. The two rotating shafts 3012 respectively pass through the first circular placement cylinder 103 and the second circular placement cylinder 1031 movably, and fixed positioning plates 1053 are provided at the opposite ends of the two rotating shafts 3012. The fixed positioning plates 1053 are used to position the placed full-ceramic denture; the transmission unit 200 includes a driving assembly. The driving assembly is used to drive the rotating shaft 3012 to unlock, the driving assembly is also used to drive the rotating shaft 3012 to rotate, and the driving assembly is also used to drive the first circular placement cylinder 103 and the second circular placement cylinder 1031 to rotate. The driving assembly drives the first circular placement cylinder 103, the second circular placement cylinder 1031 and the whole rotating unit to rotate one circle. When one circle is rotated, at this time, the driving assembly can drive the thrust rod 2034 to unlock the rotating unit 300, so that the rotating unit 300 is driven to rotate 180 degrees by the rack 301, so that the placed denture can be turned over, making it more convenient to grind the denture through the grinding assembly 1021 without the need for manual turning over every time the surface is changed.

[0022] As Figures 1 to 6 shown, in the specific implementation manner, a hydraulic cylinder 102 is arranged above the grinding assembly 1021, a top plate 1013 is arranged above the hydraulic cylinder 102, support legs 1012 are arranged around the bottom of the top plate 1013, a placing plate 1011 is arranged at the bottoms of the four support legs 1012, the placing plate 1011 is arranged on the workbench 101, two circular notches are formed in the placing plate 1011, and a first circular placing cylinder 103 and a second circular placing cylinder 1031 are respectively rotatably arranged in the inner cavities of the circular notches. Two mutually symmetrical rectangular notches 1014 are also formed in the placing plate 1011, and storage boxes 104 are placed in the inner cavities of the first circular placing cylinder 103 and the second circular placing cylinder 1031. In this setting, the installation positions and components of the first circular placing cylinder 103, the second circular placing cylinder 1031, and the grinding assembly 1021 are determined.

[0023] Example 2: Based on the above example, the difference from this example is that: As Figures 3 to 6 shown, in a full-ceramic denture grinding system, the driving assembly includes a servo motor 201. The servo motor 201 is arranged in the inner cavity of the workbench 101. A rotating rod 2011 is fixedly installed at the output end of the servo motor 201. A lower thread groove 2013, a guiding chute 2014, and an upper thread groove 2015 are formed in the rotating rod 2011. The lower thread groove 2013, the guiding chute 2014, and the upper thread groove 2015 communicate with each other. A ball 2016 is rollingly arranged in the lower thread groove 2013, and the ball 2016 also fits in the guiding chute 2014 and the upper thread groove 2015 respectively. In this setting, the components of the driving assembly are determined.

[0024] As Figures 3 to 7 shown, in the specific implementation manner, a moving sleeve 2012 is arranged on the side wall of the ball 2016. The moving sleeve 2012 is sleeved on the rotating rod 2011. Two mutually symmetrical guiding rods 2017 movably penetrate through the moving sleeve 2012, and the bottoms of the two guiding rods 2017 are arranged at the bottom of the inner cavity of the workbench 101. In this setting, it is ensured that the moving sleeve 2012 can move vertically.

[0025] As Figures 3 to 6 and Figure 8As shown, further, the side wall of the movable sleeve 2012 is respectively provided with a first fixing plate 203 and a second fixing plate 2035. The first fixing plate 203 and the second fixing plate 2035 are staggered and symmetric. A connecting plate 2031 is further provided at the opposite ends of the first fixing plate 203 and the second fixing plate 2035. A sliding mechanism is provided on both connecting plates 2031. The sliding mechanism includes a sliding groove 2032. The sliding groove 2032 is opened on one side wall of the connecting plate 2031. Two symmetrically arranged sliding blocks 2033 are slidably arranged in the inner cavity of the sliding groove 2032. One ends of the two sliding blocks 2033 are respectively provided with ejector rods 2034. In this setting, the installation position of the ejector rod 2034 is determined, ensuring that the ejector rod 2034 can move to both sides.

[0026] As Figures 3 to 6 and Figure 9 shown, further, two symmetrically arranged special-shaped sliding grooves 204 are opened on the opposite side walls of the inner cavity of the workbench 101. Four moving slide rods 2041 are slidably arranged in the inner cavities of the four special-shaped sliding grooves 204. The four moving slide rods 2041 are symmetrically arranged in pairs, and one ends are respectively arranged on the ejector rods 2034. In this setting, the opening position of the special-shaped sliding groove 204 is determined.

[0027] As Figures 3 to 6 shown, further, racks 301 are respectively fixedly installed above the first fixing plate 203 and the second fixing plate 2035. A driving gear 3011 is arranged above the two racks 301. The two driving gears 3011 are respectively engaged with the racks 301. The two driving gears 3011 are arranged on a rotating shaft 3012. Plugging holes 3013 are respectively opened on the two rotating shafts 3012. T-shaped plugging rods 302 are respectively plugged in the two plugging holes 3013. Two symmetrically arranged elastic telescopic rods 3021 are respectively arranged above the two T-shaped plugging rods 302. L-shaped mounting blocks 3014 are arranged between the four elastic telescopic rods 3021 in pairs. The two L-shaped mounting blocks 3014 are respectively rotatably arranged in the inner cavity of the workbench 101. A rotating shaft 3012 is rotatably arranged on the opposite side walls of the two L-shaped mounting blocks 3014. The bottoms of the two racks 301 are both C-shaped. In this setting, the installation position of the rack 301 and the specific components of the rotating unit 300 are determined.

[0028] As Figures 3 to 6 shown, further, a half gear 202 is fixedly installed above the rotating rod 2011. A first gear 2021 and a second gear 2022 are meshed on both sides of the half gear 202. Rotating rods 2023 are fixedly installed above the first gear 2021 and the second gear 2022. The upper ends of the two rotating rods 2023 are respectively arranged at the bottoms of the first circular placing cylinder 103 and the second circular placing cylinder 1031. In this setting, it is ensured that the first circular placing cylinder 103 and the second circular placing cylinder 1031 can rotate.

[0029] As Figures 3 to 6 shown, further, on one side wall of the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031, circular cylinders 105 are provided. The two circular cylinders 105 are symmetrical to each other. Circular insertion rods 1051 are inserted into the inner cavities of the two circular cylinders 105. Positioning plates 1052 are provided at the opposite ends of the two circular insertion rods 1051. Springs are provided at the opposite ends of the two circular insertion rods 1051, and the other ends of the springs are arranged on the inner walls of the circular cylinders 105. In this setting, it is ensured that the circular insertion rods 1051 can drive the positioning plates 1052 to position the placed dentures.

[0030] Embodiment 3: The present invention also discloses a method for preparing dentures, and the steps are as follows: Step 1: First, place the dentures to be prepared in the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031 respectively. When the placement is completed, start the hydraulic cylinder 102 to drive the grinding assembly 1021 to move downward. Under a specific programming program in the grinding assembly 1021, the dentures placed in the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031 can be ground; Step 2: At the same time, by starting the driving assembly, the driving assembly can drive the first circular placement cylinder 103 and the second circular placement cylinder 1031 to rotate progressively, so as to ensure that the grinding assembly 1021 grinds the peripheries of the dentures placed in the first circular placement cylinder 103 and the second circular placement cylinder 1031; Step 3: At the same time, when the peripheral grinding is completed, at this time, the first circular placement cylinder 103 and the second circular placement cylinder 1031 rotate to the initial state. When the driving assembly continues to rotate a quarter of a circle at this time, the ejector rod 2034 can eject the T-shaped insertion rod 302 into the rotating shaft 3012. And when the T-shaped insertion rod 302 is ejected from the rotating shaft 3012, at this time, the rack 301 will engage with the driving gear 3011, so that the rotating shaft 3012 can rotate, so that the placed dentures can be turned over and ground; Step 4: When the grinding is completed, at this time, operate the driving assembly in the reverse direction, so as to ensure that the powder generated during the grinding of the dentures falls onto the storage box 104.

[0031] The implementation principle of a full-ceramic denture grinding system and its method for preparing dentures in this embodiment is as follows: First, place the dentures to be prepared in the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031 respectively. When the placement is completed, start the hydraulic cylinder 102 to drive the grinding assembly 1021 to move downward. Under a specific programming program in the grinding assembly 1021, the dentures placed in the inner cavities of the first circular placement cylinder 103 and the second circular placement cylinder 1031 can be ground (the specific grinding is prior art). At the same time, start the servo motor 201, so that the servo motor 201 can drive the moving sleeve 2012 to move vertically with the assistance of the rotating rod 2011, the lower thread groove 2013 and the guide rod 2017. When the rotating rod 2011 rotates, it can drive the half gear 202 to rotate. When the half gear 202 rotates, it can first drive the first gear 2021 to rotate, and then drive the second gear 2022 to rotate. When the first gear 2021 rotates, it will be able to drive the first circular placement cylinder 103 to rotate a certain angle through the rotating rod 2023. When the first circular placement cylinder 103 rotates a certain angle, it can drive the whole rotating unit 300 to rotate a certain angle. Until the moving sleeve 2012 leaves the lower thread groove 2013, at this time, the first circular placement cylinder 103 can return to the initial position, and at the same time, it is also the end of the grinding of this surface by the grinding assembly 1021; At the same time, when the moving sleeve 2012 moves vertically on the lower thread groove 2013, it can also drive the first fixed plate 203 and the second fixed plate 2035 to move vertically, so that the rack 301, the ejector rod 2034 and the moving slide rod 2041 can move vertically in the special-shaped chute 204; When the moving sleeve 2012 enters the guide chute 2014 and its rotating rod 2011 rotates a quarter of a circle, at this time, it can push open the T-shaped plugging rod 302 through the ejector rod 2034. At the same time, the ejector rod 2034 can move to both sides with the assistance of the special-shaped chute 204 and the moving slide rod 2041 (because the bottom of the ejector rod 2034 slides with the connecting plate 2031). When the rotating rod 2011 continues to rotate, at this time, the rack 301 and the driving gear 3011 are meshed with each other, so the driving gear 3011 can be rotated. At the same time, the ejector rod 2034 leaves the T-shaped plugging rod 302, so the T-shaped plugging rod 302 can fall with the assistance of the elastic telescopic rod 3021, so that the T-shaped plugging rod 302 is located on the rotating shaft 3012 at this time. Until the rotating shaft 3012 rotates half a circle, at this time, the T-shaped plugging rod 302 can be plugged into the plugging hole 3013 to limit the rotating shaft 3012; when the rotating shaft 3012 rotates half a circle, it can drive the fixed positioning plate 1053 to drive the denture to rotate 180 degrees, so that the denture can change its surface (at this time, the surface change is completed when the moving sleeve 2012 moves to the bottom of the upper thread groove 2015); When the moving sleeve 2012 continues to move upward, at this time, because the ejector rods 2034 are located on both sides and the bottom of the rack 301 is C-shaped, when the rotating rod 2011 drives the first circular placement cylinder 103 and the second circular placement cylinder 1031 to rotate, when the entire rotating unit 300 rotates, there will be no interference at this time. Therefore, it is ensured that the denture after the surface replacement can be ground; When the grinding is completed, the driving assembly is operated in the reverse direction at this time. Therefore, it can be ensured that the powder generated during the grinding of the denture falls onto the storage box 104 (where the ejector rods 2034 always remain open and move downward during the reset process, and can be reset with the assistance of the special-shaped chute 204 only when approaching the bottom).

Claims

1. An all-ceramic denture grinding system, comprising a grinding unit (100), a transmission unit (200) and a rotation unit (300), characterized in that: The grinding unit (100) comprises a grinding assembly (1021), wherein a first circular placement tube (103) and a second circular placement tube (1031) are arranged at the bottom of the grinding assembly (1021), and all-ceramic dentures are placed in the inner cavities of the first circular placement tube (103) and the second circular placement tube (1031), and the grinding assembly (1021) is used to grind the placed all-ceramic dentures; The rotating unit (300) comprises two rotating shafts (3012), the two rotating shafts (3012) respectively movably penetrate the first circular placement tube (103) and the second circular placement tube (1031), and opposite ends of the two rotating shafts (3012) are provided with fixed positioning plates (1053), the fixed positioning plates (1053) being used to position the placed all-ceramic denture; The transmission unit (200) comprises a driving assembly, the driving assembly being used to drive the rotating shaft (3012) to unlock, the driving assembly being also used to drive the rotating shaft (3012) to rotate, and the driving assembly being also used to drive the first circular placement cylinder (103) and the second circular placement cylinder (1031) to rotate.

2. The all-ceramic denture grinding system according to claim 1, characterized in that: A hydraulic cylinder (102) is arranged above the grinding assembly (1021), a top plate (1013) is arranged above the hydraulic cylinder (102), supporting legs (1012) are arranged around the bottom of the top plate (1013), a placement plate (1011) is arranged at the bottom of the four supporting legs (1012), the placement plate (1011) is arranged on the workbench (101), two circular notches are provided on the placement plate (1011), and a first circular placement tube (103) and a second circular placement tube (1031) are rotatably arranged in the inner cavities of the circular notches, and two mutually symmetrical rectangular notches (1014) are also provided on the placement plate (1011), and a storage box (104) is placed in the inner cavities of the first circular placement tube (103) and the second circular placement tube (1031).

3. The all-ceramic denture grinding system according to claim 1, characterized in that: The drive assembly comprises a servo motor (201), the servo motor (201) being arranged in an inner cavity of a workbench (101), a rotating rod (2011) being fixedly mounted on an output end of the servo motor (201), the rotating rod (2011) being provided with a lower thread groove (2013), a guide slide groove (2014) and an upper thread groove (2015), the lower thread groove (2013), the guide slide groove (2014) and the upper thread groove (2015) being interconnected, a ball (2016) being rollingly arranged on the lower thread groove (2013), and the ball (2016) also respectively fits in the guide slide groove (2014) and the upper thread groove (2015).

4. The all-ceramic denture grinding system according to claim 3, characterized in that: The side wall of the ball bearing (2016) is provided with a movable sleeve (2012), the movable sleeve (2012) is sleeved on the rotating rod (2011), and two mutually symmetrical guide rods (2017) are movably penetrated through the movable sleeve (2012), and the bottoms of the two guide rods (2017) are arranged at the bottom of the inner cavity of the workbench (101).

5. The all-ceramic denture grinding system according to claim 4, characterized in that: The side walls of the movable sleeve (2012) are respectively provided with a first fixing plate (203) and a second fixing plate (2035), the first fixing plate (203) and the second fixing plate (2035) are staggered and symmetrical, a connecting plate (2031) is further provided at the opposite end of the first fixing plate (203) and the second fixing plate (2035), and a sliding mechanism is provided on both connecting plates (2031), the sliding mechanism comprises a sliding groove (2032), the sliding groove (2032) is opened on a side wall of the connecting plate (2031), and two mutually symmetrical sliding blocks (2033) are slidingly provided in the inner cavity of the sliding groove (2032), and a push rod (2034) is respectively provided at one end of the two sliding blocks (2033).

6. The all-ceramic denture grinding system according to claim 1, characterized in that: Two mutually symmetrical special-shaped slide grooves (204) are provided on opposite side walls of the inner cavity of the workbench (101); movable slide rods (2041) are slidably arranged in the inner cavities of the four special-shaped slide grooves (204); the four movable slide rods (2041) are symmetrical to each other and one end of each is arranged on the top rod (2034).

7. The all-ceramic denture grinding system according to claim 5, characterized in that: Racks (301) are fixedly mounted on the first fixing plate (203) and the second fixing plate (2035), respectively. Driving gears (3011) are arranged on the two racks (301). The two driving gears (3011) are respectively meshed with the racks (301). The two driving gears (3011) are arranged on a rotating shaft (3012). The two rotating shafts (3012) are respectively provided with plugging holes (3013). T-type connectors are respectively plugged into the two plugging holes (3013). shaped plug-in rods (302), two mutually symmetrical elastic telescopic rods (3021) are respectively arranged above the two T-shaped plug-in rods (302), L-shaped mounting blocks (3014) are arranged between two of the four elastic telescopic rods (3021), the two L-shaped mounting blocks (3014) are respectively rotatably arranged in the inner cavity of the workbench (101), and a rotating shaft (3012) is rotatably arranged on one side wall opposite to the two L-shaped mounting blocks (3014), and the bottoms of the two racks (301) are both C-shaped.

8. The all-ceramic denture grinding system according to claim 3, characterized in that: A half gear (202) is fixedly mounted above the rotating rod (2011), a first gear (2021) and a second gear (2022) are meshedly mounted on both sides of the half gear (202), a rotating rod (2023) is fixedly mounted above the first gear (2021) and the second gear (2022), and the upper ends of the two rotating rods (2023) are respectively arranged at the bottom of the first circular placement tube (103) and the bottom of the second circular placement tube (1031).

9. The all-ceramic denture grinding system according to claim 1, characterized in that: A circular cylinder (105) is disposed on one side wall of the inner cavity of the first circular placement cylinder (103) and the second circular placement cylinder (1031); the two circular cylinders (105) are symmetrical to each other; circular plug-in rods (1051) are plugged into the inner cavities of the two circular cylinders (105); positioning plates (1052) are disposed at opposite ends of the two circular plug-in rods (1051); springs are disposed at opposite ends of the two circular plug-in rods (1051), and the other end of the spring is disposed on the inner wall of the circular cylinder (105).

10. A method for preparing a denture, characterized in that: An all-ceramic denture grinding system applied to any one of claims 1 to 9, wherein the method for preparing a denture comprises the following steps: Step 1: First, the dentures to be prepared are placed in the inner cavities of the first circular placement cylinder (103) and the second circular placement cylinder (1031) respectively. When the placement is completed, the hydraulic cylinder (102) is started to drive the grinding assembly (1021) to move downward, and the dentures placed in the inner cavities of the first circular placement cylinder (103) and the second circular placement cylinder (1031) can be ground through a specific programming program in the grinding assembly (1021); Step 2: Simultaneously starting the driving assembly so that the driving assembly can drive the first circular placement tube (103) and the second circular placement tube (1031) to rotate progressively, thereby ensuring that the grinding assembly (1021) can grind the periphery of the denture placed in the first circular placement tube (103) and the second circular placement tube (1031); Step 3: When the grinding of all four sides is completed, the first circular placement cylinder (103) and the second circular placement cylinder (1031) rotate to the initial state, and the driving assembly continues to rotate a quarter of a turn to allow the ejector rod (2034) to eject the T-shaped plug rod (302) from the rotating shaft (3012). When the T-shaped plug rod (302) ejects the rotating shaft (3012), the rack (301) will mesh with the driving gear (3011), so that the rotating shaft (3012) can rotate, so that the placed denture can be changed and ground; Step 4: When the grinding is finished, the driving assembly is operated in reverse, so that the powder generated during the grinding process of the denture can fall onto the storage box (104).

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