Magnetorheological polishing machine for denture polishing

Abstract

The utility model relates to the technical field of polishing of complex 3D molded surfaces such as false teeth and discloses a magneto-rheological polishing machine for false tooth polishing. Comprising an electromagnetic and permanent magnet module, a servo drive workpiece cycloid rotating device, a servo drive workpiece lifting device, a lifting type protective cover plate, an integrated grinding barrel, a frame box body, a false tooth fixing universal clamp and a control panel, the servo-driven workpiece cycloid rotating device comprises a standard servo motor, a planetary reducer, a revolution gear, a planetary gear, a universal clamp fixing device and a false tooth fixing universal clamp, and the servo-driven workpiece lifting device comprises a lifting guide linear bearing or linear guide rail, a lifting ball screw and a lifting servo motor. According to the artificial tooth polishing device, the magnetic rheological areas with the number equal to that of the magnetic pole pairs are formed in the integrated abrasive barrel, magnetic abrasives enter small narrow slits of the artificial tooth to achieve efficient polishing, the surface of the artificial tooth presents natural gloss, and the requirements for the comfort degree and biocompatibility of the human body can be met without glazing.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing complex 3D surfaces such as dentures, and in particular to a magnetorheological polishing machine for polishing dentures. Background Art

[0002] The dental denture industry primarily requires dentures made of zirconium dioxide, microcrystalline glass ceramics, other ceramics, titanium, and PEEK polymer materials. Different models are generated based on the individual's tooth morphology, and then physical dentures are manufactured using different processes based on these models. After denture molding, precision polishing is required to improve the palatability and comfort of the teeth. A smooth denture surface can also reduce the accumulation of food debris and the chance of bacterial growth, thereby enhancing the biocompatibility of the denture.

[0003] The traditional denture polishing machine consists of a base, a power unit, a polishing wheel assembly, a clamping device, a protective cover and a control panel. The base provides stable support. The power unit includes a motor, a pulley and a belt to provide energy for the rotation of the polishing wheel. The polishing wheel assembly contains a polishing wheel, a rotating shaft and a bearing. The polishing wheel is made of various materials and has abrasive materials. The clamping device fixes the denture, the protective cover protects the operator, and the control panel can control the start and stop, speed regulation, etc. of the machine.

[0004] Because the occlusal surfaces of human teeth have many tiny grooves, the gaps between individual teeth in multi-tooth bridge dentures are also very small. Currently, factories and dental clinics engaged in denture manufacturing all use manual polishing, and there are no machines or equipment on the market that can perform automated polishing. Limited by the size of polishing tools, manual polishing is difficult to reach these small and narrow features. Using electric or pneumatic polishing tools and grinding heads for polishing generates a large amount of dust and a lot of noise, which is very detrimental to the health of polishers and doctors. After polishing, the polishing effect is not satisfactory. Therefore, traditional manual polishing requires glazing the denture after polishing and re-sintering at high temperature to achieve the requirements of aesthetics, comfort and biocompatibility. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a magnetorheological polishing machine for denture polishing, which aims to improve the traditional polishing method. Since the size of the polishing tool cannot reach small gaps, the polishing effect after polishing is not achieved. The pneumatic electric polishing grinding head tool will generate a large amount of dust and a lot of noise during grinding and polishing, which is very detrimental to the health of polishing workers and doctors.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a magnetorheological polishing machine for denture polishing, comprising an integrated abrasive barrel, an electromagnetic and permanent magnet module is arranged inside the integrated abrasive barrel, a servo-driven workpiece cycloid rotation device is arranged inside the integrated abrasive barrel, a servo-driven workpiece lifting device is arranged inside the integrated abrasive barrel, a lifting protective cover is arranged on the top of the integrated abrasive barrel, the outer wall of the integrated abrasive barrel is fixedly connected to a frame box, a denture fixing universal clamp is arranged inside the integrated abrasive barrel, and a control panel is arranged on the outer wall of the frame box. Further, the servo-driven workpiece cycloid rotation device includes: a standard servo motor, a planetary reducer and a revolving gear, a planetary gear, a universal clamp fixing device, and a denture fixing universal clamp.

[0007] Furthermore, the servo-driven workpiece lifting device includes: a lifting guide linear bearing or a linear guide rail, a lifting ball screw, and a lifting servo motor.

[0008] Furthermore, the servo-driven workpiece cycloid rotation device also includes: a lifting protective cover plate, a cover plate safety protection anti-pinch rubber plate, and the lifting protective cover plate is fixedly connected to the upper end surface position of the servo-driven workpiece lifting device.

[0009] Furthermore, the universal fixture for fixing dentures includes: a built-in screw-locking fixture plate, a connecting rod and an anti-drop and anti-stupid pin, the anti-drop and anti-stupid pin is threadedly connected to the inside of the connecting rod, and the built-in screw-locking fixture plate is fixedly connected to the bottom inside the connecting rod.

[0010] Furthermore, the output end of the standard servo motor is fixedly connected to the lower surface of the revolving gear, and the revolving gear is meshed with the planetary gear.

[0011] Furthermore, the output end of the lifting servo motor is fixedly connected to the bottom end of the lifting ball screw, and the electromagnetic and permanent magnet modules are arranged in a ring array inside the integrated abrasive barrel.

[0012] Furthermore, the integrated abrasive barrel is provided with magnetic abrasives inside, and a medium for dry grinding and cleaning is provided above the magnetic abrasives.

[0013] Furthermore, the dry grinding cleaning medium is: walnut shell particles, corn cob particles, sisal particles, sawdust, straw, rice husk, resin polymer material particles, and the magnetic abrasive is wiped off the denture workpiece through the friction of the above media.

[0014] Furthermore, the side walls of the frame box are fixedly connected to a side lifting device, a plurality of slide rails are fixedly connected inside the side lifting device, the outer walls of the slide rails are slidably connected to a slide, the top of the side lifting device is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a push platform, the push platform is fixedly connected to the side wall of the slide, and the slide is fixedly connected to the bottom of the integrated abrasive barrel.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, the magnetic medium is firstly constrained by the magnetic field, and the magnetic medium entrains the non-magnetic abrasive, forming a magnetorheological zone equivalent to the number of magnetic pole pairs in the integrated abrasive barrel. The magnetic abrasive is a fine particle that can enter the small and narrow gaps of the denture to achieve efficient polishing. Moreover, due to the uniformity and high surface finish of the magnetic abrasive polishing, the surface of the polished denture presents a natural luster, and can meet the requirements of human comfort and biocompatibility without glazing.

[0017] 2. In the present invention, the servo-driven workpiece cycloidal rotating device is raised and lowered in the central area of ​​the integrated abrasive barrel, which greatly reduces the size of the equipment and avoids the difference in polishing effect caused by inefficient grinding and polishing of the workpiece in the low linear speed area. The built-in screw locking fixture disk and the bottom of the disk connected to the connecting rod in the denture fixing universal clamp adopt a screw-hidden design, which avoids the wear of the screws that fasten the denture, greatly improves the service life of the denture fixing universal clamp, and eliminates the hidden danger of difficulty in disassembly due to wear of the screw head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a magnetorheological polishing machine for denture polishing proposed in the present invention;

[0019] Figure 2 This is a schematic diagram of the integrated abrasive structure of a magnetorheological polishing machine for denture polishing proposed in the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a lifting servo motor of a magnetorheological polishing machine for denture polishing proposed in the utility model;

[0021] Figure 4 This is a schematic diagram of the connecting rod structure of a magnetorheological polishing machine for denture polishing proposed in the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of a side-mounted lifting device of a magnetorheological polishing machine for denture polishing proposed in the present invention;

[0023] Figure 6 This is a schematic diagram of the push table structure of a magnetorheological polishing machine for denture polishing proposed by the utility model.

[0024] Legend:

[0025] 1. Electromagnetic and permanent magnet modules; 2. Servo-driven workpiece cycloidal rotation device; 3. Servo-driven workpiece lifting device; 4. Lifting protective cover; 5. Integrated abrasive barrel; 6. Frame box; 7. Universal fixture for denture fixation; 8. Control panel; 9. Standard servo motor; 10. Planetary reducer; 11. Revolution gear; 12. Planetary gear; 13. Universal fixture fixture; 14. Lifting guide linear bearing or linear guide; 15. Lifting ball screw; 16. Lifting servo motor; 17. Cover safety protection anti-pinch rubber plate; 18. Built-in screw locking fixture plate; 19. Connecting rod; 20. Anti-drop and anti-stuck pins; 21. Side lifting device; 22. Hydraulic cylinder; 23. Push table; 24. Slide rail; 25. Slide table. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 1-Figure 4, the utility model provides an embodiment: a magnetorheological polishing machine for denture polishing, including an integrated abrasive barrel 5, the integrated abrasive barrel 5, as a container for accommodating magnetic abrasives, has a specific magnetic field environment inside, and the magnetic abrasives are affected by the magnetic field to form a magnetorheological zone, the integrated abrasive barrel 5 is provided with an electromagnetic and permanent magnet module 1 inside, the electromagnetic and permanent magnet module 1 can form a magnetic field in a specific area through the combined action of electromagnetic and permanent magnets, thereby constraining the magnetic medium, thereby affecting the distribution and behavior of the magnetic abrasive, and providing the necessary magnetic conditions for the polishing process, the integrated abrasive barrel 5 is provided with a servo-driven workpiece cycloidal rotating device 2 inside, the servo-driven workpiece cycloidal rotating device 2 can make the denture fixing universal clamp 7 and the clamped denture perform cycloidal rotation motion, this cycloidal motion mode enables the denture to fully contact and rub with the magnetic abrasive during the polishing process, and the servo drive can accurately control the speed, direction and other parameters of the motion to ensure the stability and controllability of the polishing effect, the integrated integrated A servo-driven workpiece lifting device 3 is provided inside the abrasive barrel 5. The servo-driven workpiece lifting device 3 is used to realize the lifting action of the workpiece in the vertical direction. Through precise servo control, the denture fixing universal clamp 7 and the workpiece can be moved to a suitable height position, interacting with the magnetic abrasives in different height areas in the integrated abrasive barrel 5. At the same time, it can also cooperate with the servo-driven workpiece cycloidal rotation device 2 to realize a more complex polishing path. A lifting protective cover 4 is provided on the top of the integrated abrasive barrel 5. The lifting protective cover 4 descends to cover the working area during the polishing process, which prevents the abrasive from splashing and protects the safety of the operator. At the same time, it can also avoid external factors from interfering with the polishing process. The outer wall of the integrated abrasive barrel 5 is fixedly connected to a frame box 6. A denture fixing universal clamp 7 is provided inside the integrated abrasive barrel 5. The denture fixing universal clamp 7 can firmly clamp the denture to ensure that the denture will not loosen or shift during the polishing process. A control panel 8 is provided on the outer wall of the frame box 6.

[0028] Specifically, the magnetic medium is constrained by the magnetic field, and the magnetic medium entrains non-magnetic abrasive to form a magnetorheological zone equivalent to the number of magnetic pole pairs in the integrated abrasive barrel 5. In a non-magnetic environment, the abrasive is in a loose powder or liquid state. When encountering a magnetic field, the magnetic abrasive quickly gathers in the magnetic line area. When the polished workpiece is driven by the servo-driven workpiece cycloidal rotation device 2 to perform high-speed cycloidal motion, the workpiece and the rheological magnetic abrasive rub against each other. Since the workpiece has to overcome the magnetic constraint, there is a very strong shear force between the two, thereby achieving a grinding and polishing effect. When the polished workpiece leaves the polishing area, the magnetic medium is quickly restored due to the magnetic line of force, so that the abrasive is renewed. The magnetic abrasive is a fine particle and can enter the small and narrow gaps of the denture to achieve efficient polishing. Due to the uniformity and high surface finish of the magnetic abrasive polishing, the polished denture surface presents a natural luster, which can meet the human comfort and biocompatibility requirements without glazing.

[0029] Reference Figure 2-Figure 6 , an embodiment provided by the utility model: a servo-driven workpiece cycloid rotating device 2 includes: a standard servo motor 9, a planetary reducer 10 and a revolving gear 11, a planetary gear 12, a universal fixture fixing device 13, a denture fixing universal fixture 7, a servo-driven workpiece lifting device 3 includes: a lifting guide linear bearing or a linear guide rail 14, a lifting ball screw 15, a lifting servo motor 16, the servo-driven workpiece cycloid rotating device 2 also includes: a lifting protective cover 4, a cover safety protection anti-pinch rubber plate 17, the lifting protective cover 4 is fixedly connected to the upper end surface position of the servo-driven workpiece lifting device 3, the denture fixing universal fixture 7 includes: a built-in screw locking clamp disk 18, a connecting rod 19 and an anti-drop and anti-stupid pin 20, the anti-drop and anti-stupid pin 20 is threadedly connected to the inside of the connecting rod 19, the built-in screw locking clamp disk 18 is fixedly connected to the bottom inside the connecting rod 19, the output end of the standard servo motor 9 is fixedly connected to the lower surface of the revolving gear 11, the revolving gear 11 The output end of the lifting servo motor 16 is fixedly connected to the bottom end of the lifting ball screw 15, and the electromagnetic and permanent magnet modules 1 are arranged in a ring array inside the integrated abrasive barrel 5. A dry grinding cleaning medium is set above the magnetic abrasive. The dry grinding cleaning medium is: walnut shell particles, corn cob particles, sisal particles, sawdust, straw, rice husk, resin polymer material particles. The magnetic abrasive is wiped off the denture workpiece through the friction of the above-mentioned medium. Rub to wipe the magnetic abrasive off the denture workpiece, thereby realizing the cleaning-free function. The side wall of the frame box 6 is fixedly connected to the side lifting device 21, and a plurality of slide rails 24 are fixedly connected inside the side lifting device 21. The outer walls of the slide rails 24 are slidably connected to the slide 25. The top of the side lifting device 21 is fixedly connected to the hydraulic cylinder 22, and the output end of the hydraulic cylinder 22 is fixedly connected to the push platform 23. The push platform 23 is fixedly connected to the side wall of the slide 25, and the slide 25 is fixedly connected to the bottom of the integrated abrasive barrel 5.

[0030] Specifically, an integrated magnetorheological integrated abrasive barrel 5 is adopted, and the servo-driven workpiece cycloidal rotating device 2 is raised and lowered in the central area of ​​the integrated abrasive barrel 5. Since the linear velocity of the inner circle area of ​​the integrated abrasive barrel 5 is the lowest and the polishing efficiency is the lowest, this equipment uses this inefficient and invalid area as the motion area of ​​the polishing action. In this way, the volume of the equipment is greatly reduced, and at the same time, the difference in polishing effect caused by inefficient grinding and polishing of the workpiece in the low linear velocity area is avoided. A flexible rubber contact cover is used between the liftable protective cover 4 and the upper panel of the fuselage. Safety protection anti-pinch rubber plate 17, and the gap between the outer diameter of the lifting protection cover 4 and the upper panel of the fuselage is larger than the size of a human finger, which prevents the fingers of people from entering the dangerous area from the hardware. At the same time, in terms of control, the lifting servo motor 16 is designed with an anti-pinch function. The control panel 8 detects the load current change when the lifting servo motor 16 is lifted. When encountering abnormal resistance, the control panel 8 controls the lifting servo motor 16 to perform an upward action, effectively preventing the operator from being pinched by the lifting protection cover 4. In order to adapt to the polishing of different dentures, a denture fixing device that can clamp multiple dentures at the same time is used. The universal fixture 7 has a built-in screw-locking fixture disk 18 and a bottom of the disk connected to the connecting rod 19, which adopts a screw-in design to avoid the wear of the screws that fasten the denture, greatly improve the service life of the universal fixture 7 for fixing the denture, and eliminate the hidden danger of difficulty in disassembly due to wear of the screw head. In the specific structure, the output end of the standard servo motor 9 is fixedly connected to the lower surface of the revolving gear 11, and the revolving gear 11 is meshed with the planetary gear 12 to drive the universal fixture fixing device 13 and the universal fixture 7 for fixing the denture to move; the output end of the lifting servo motor 16 is fixedly connected Connected to the bottom end of the lifting ball screw 15, the electromagnetic and permanent magnet modules 1 are arranged in a circular array inside the integrated abrasive barrel 5 to provide a magnetic field environment for polishing. At the same time, the denture fixing universal clamp 7 is also provided with anti-drop and anti-stupid pins 20 to further ensure the stability and safety of the denture clamping. The lifting guide linear bearing or linear guide rail 14 in the servo-driven workpiece lifting device 3 is used to ensure the smoothness of the lifting. Furthermore, the hydraulic cylinder 22 pushes the push table 23 and synchronously drives the slide 25 to slide on the side wall of the slide rail 24 to realize the side lifting function of the integrated abrasive barrel 5.

[0031] Working principle: This magnetorheological polishing machine generates a magnetic field through the electromagnetic and permanent magnet module 1, so that the magnetic medium carries the magnetic abrasive to form a magnetorheological zone in the integrated abrasive barrel 5. The workpiece fixed by the universal fixture 7 for fixing the denture is driven by the servo-driven workpiece cycloidal rotating device 2 to perform high-speed cycloidal motion and rub against the magnetic abrasive. The workpiece overcomes the magnetic force and generates a strong shear force to achieve polishing. The abrasive is updated when the workpiece leaves. The fine magnetic abrasive can efficiently polish the small and narrow gaps of the denture to ensure the surface quality of the denture. The servo-driven workpiece cycloidal rotating device 2 rises and falls in the central area of ​​the integrated abrasive barrel 5, and the polishing of the inefficient area of ​​the inner ring is used to achieve miniaturization and avoid differences in polishing effects. The standard servo motor 9 in the servo-driven workpiece cycloidal rotating device 2 and the lifting servo motor 16 in the servo-driven workpiece lifting device 3 are powered by single-phase 220V. The control panel 8 uses a 220V to 24V power supply. The lifting protective cover 4 is in flexible contact with the body panel through the cover safety protection anti-pinch rubber plate 17, and the gap prevents fingers from entering. The control panel 8 detects the load current of the lifting servo motor 16, and controls its rise in case of abnormal resistance to prevent pinching. The built-in screw locking clamp disk 18 and the connecting rod 19 of the denture fixing universal clamp 7 are connected, and the screws at the bottom of the disk are built in to prevent screw wear, improve the life of the clamp and avoid disassembly hazards. The standard servo motor 9 drives the universal clamp fixing device 13 and the clamp to move through the orbital gear 11 and the planetary gear 12. The lifting servo motor 16 drives the lifting ball screw 15. The electromagnetic and permanent magnet module 1 is arranged in a circular array in the integrated abrasive barrel 5. The denture fixing universal clamp 7 also has anti-drop and anti-stupid pins 20, and the lifting guide linear bearing or linear guide rail 14 ensures smooth lifting.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetorheological polishing machine for polishing dentures, comprising an integrated abrasive barrel (5), characterized in that: The integrated abrasive barrel (5) is provided with an electromagnetic and permanent magnet module (1) inside, a servo-driven workpiece cycloidal rotating device (2) inside, a servo-driven workpiece lifting device (3) inside, a lifting protective cover (4) on the top of the integrated abrasive barrel (5), a frame box (6) fixedly connected to the outer wall of the integrated abrasive barrel (5), a denture fixing universal clamp (7) inside, and a control panel (8) on the outer wall of the frame box (6).

2. The magnetorheological polishing machine for denture polishing according to claim 1, characterized in that: The servo-driven workpiece cycloid rotation device (2) comprises: a standard servo motor (9), a planetary reducer (10), a revolving gear (11), a planetary gear (12), a universal fixture fixing device (13), and a denture fixing universal fixture (7).

3. The magnetorheological polishing machine for denture polishing according to claim 2, characterized in that: The servo-driven workpiece lifting device (3) comprises: a lifting guide linear bearing or a linear guide rail (14), a lifting ball screw (15), and a lifting servo motor (16).

4. The magnetorheological polishing machine for denture polishing according to claim 3, characterized in that: The servo-driven workpiece cycloid rotating device (2) further comprises: a lifting protective cover plate (4) and a cover plate safety protection anti-pinch rubber plate (17). The lifting protective cover plate (4) is fixedly connected to the upper end surface position of the servo-driven workpiece lifting device (3).

5. The magnetorheological polishing machine for denture polishing according to claim 4, characterized in that: The universal fixture for fixing dentures (7) comprises: a fixture plate with a built-in screw locking type (18), a connecting rod (19) and an anti-drop and anti-stupid pin (20), wherein the anti-drop and anti-stupid pin (20) is threadedly connected to the inside of the connecting rod (19), and the built-in screw locking type fixture plate (18) is fixedly connected to the bottom inside the connecting rod (19).

6. The magnetorheological polishing machine for denture polishing according to claim 5, characterized in that: The output end of the standard servo motor (9) is fixedly connected to the lower surface of the revolving gear (11), and the revolving gear (11) is meshed with the planetary gear (12).

7. The magnetorheological polishing machine for denture polishing according to claim 3, characterized in that: The output end of the lifting servo motor (16) is fixedly connected to the bottom end of the lifting ball screw (15), and the electromagnetic and permanent magnet modules (1) are arranged in a ring array inside the integrated abrasive barrel (5).

8. The magnetorheological polishing machine for denture polishing according to claim 1, characterized in that: A dry grinding cleaning medium is provided above the magnetic abrasive.

9. The magnetorheological polishing machine for denture polishing according to claim 8, characterized in that: The media used for dry grinding and cleaning are: walnut shell particles, corn cob particles, sisal particles, wood chips, straw, rice husks, and resin polymer material particles. The magnetic abrasive is wiped off the denture workpiece through friction of the above media.

10. The magnetorheological polishing machine for denture polishing according to claim 1, characterized in that: The side wall of the frame box (6) is fixedly connected to a side lifting device (21), a plurality of slide rails (24) are fixedly connected inside the side lifting device (21), the outer walls of the slide rails (24) are slidably connected to a slide platform (25), the top of the side lifting device (21) is fixedly connected to a hydraulic cylinder (22), the output end of the hydraulic cylinder (22) is fixedly connected to a push platform (23), the push platform (23) is fixedly connected to the side wall of the slide platform (25), and the slide platform (25) is fixedly connected to the bottom of the integrated abrasive barrel (5).

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