CN218657351U

CN218657351U - Appliance cutting system

Info

Publication number: CN218657351U
Application number: CN202220813607.1U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Shanghai Kaiyan Internet Technology Co ltd
Current assignee: Shanghai Kaiyan Internet Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-03-21
Anticipated expiration: 2032-03-31

Abstract

The embodiment of the application relates to the technical field of medical instrument production, and discloses an orthopedic appliance cutting system. The appliance cutting system comprises a clamp, a laser output device, a driving device and an air blowing device; the fixture is used for fixing the dental model and covering the shell-shaped tooth appliance to be cut on the dental model after film pressing; the laser output device is used for outputting laser beams with preset power to cut the shell-shaped tooth appliance to be cut; the driving device is used for driving the clamp to drive the shell-shaped tooth appliance to be cut and the laser output device to generate relative movement along a preset cutting path so as to finish cutting the shell-shaped tooth appliance to be cut and obtain the shell-shaped tooth appliance. The appliance cutting system provided by the embodiment of the application can reduce the adhesion effect of the gasified substances on the surface of the shell-shaped tooth appliance and improve the product yield of the shell-shaped tooth appliance.

Description

Appliance cutting system

Technical Field

The embodiment of the application relates to the technical field of medical instrument production, in particular to an orthopedic appliance cutting system.

Background

Orthodontic treatment corrects deformities of teeth by applying appropriate forces to the teeth to cause physiological movement of the teeth. In orthodontic treatment, the invisible shell-shaped tooth appliance is the first choice for more and more patients with tooth deformity because the wearing is comfortable and the aesthetic effect of the tooth part can not be influenced.

The shell-shaped tooth appliance usually adopts a laser cutting mode in the production process, and a membrane covered on the dental jaw model is melted by high temperature through laser cutting, so that the cutting task is finally completed. However, the gasified substances generated when the membrane is melted at a high temperature can be attached to the shell-shaped tooth appliance, so that the surface of the shell-shaped tooth appliance generates attachments, the adhesion is strong, the subsequent treatment process is extremely difficult, and the rejection condition of the shell-shaped tooth appliance can be caused, so that the product yield of the shell-shaped tooth appliance is influenced. Therefore, it is an urgent problem to reduce the adhesion effect of the vaporized substance on the surface of the shell-shaped orthodontic appliance to improve the product yield of the shell-shaped orthodontic appliance.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide an appliance cutting system, can reduce the attached effect of gasification material on shell form tooth appliance surface, improve the product yield of shell form tooth appliance.

In order to solve the above technical problem, embodiments of the present application provide an appliance cutting system for cutting of a shell-shaped tooth appliance, including:

the fixture is used for fixing the dental model and covering the shell-shaped tooth appliance to be cut on the dental model after film pressing;

the laser output device is used for outputting laser beams with preset power to cut the shell-shaped tooth appliance to be cut;

the driving device is used for driving the clamp to drive the shell-shaped tooth appliance to be cut and the laser output device to generate relative movement along a preset cutting path so as to finish cutting the shell-shaped tooth appliance to be cut and obtain the shell-shaped tooth appliance;

the blowing device comprises a blowing pipe connected with an air source, and the blowing pipe blows airflow with preset first pressure intensity to the shell-shaped tooth appliance to be cut along a first preset angle and a first preset distance; wherein,

the preset first pressure meets the following conditions: blowing high-temperature gasified substances generated when the shell-shaped tooth appliance to be cut is cut by the laser beam away from the shell-shaped tooth appliance by using air flow; presetting a first pressure as the pressure when the airflow reaches the shell-shaped tooth appliance;

the first preset angle is a line-surface included angle between a center line of the airflow and a reference plane, wherein the reference plane is a plane which passes through the center line of the laser beam and is perpendicular to a normal plane, and the normal plane is a plane which passes through the center line of the laser beam and is perpendicular to a tangent plane of a laser incidence point on the shelllike tooth appliance; the gas flow blown by the gas blowing pipe is positioned above the laser output device before reaching the shell-shaped tooth appliance to be cut, and the center line of the gas flow and the normal plane of the cutting position point in the preset cutting path of the shell-shaped tooth appliance are arranged at a second preset angle;

the first preset distance is the distance from the incident central point of the airflow on the shell-shaped tooth appliance to be cut to the reference surface, the first preset distance is more than or equal to 0.5mm and less than or equal to the critical height, and the critical height is the smaller height of 1/2 of the highest crown height and 2/3 of the lowest crown height on the shell-shaped tooth appliance to be cut or the critical height is 3mm.

The appliance cutting system provided by the embodiment of the application increases the blowing device to blow out airflow with preset pressure to the shell-shaped tooth appliance to be cut along a preset angle and a preset distance. Wherein, through controlling the angle that the gas blowing device blew off the air current, can make the gasification material that produces during laser cutting blow away to waste material one side by the gas to can't adhere to and deposit on shell form tooth and rectify the ware surface. And through controlling the distance that the gas blowing device blew off the air current, can reach better effect of blowing to produce sufficient effort to the gasification material that produces during the laser cutting, thereby through the air current that gas blowing device blew off, reduce the adhesion effect of gasification material on shell form tooth correction device surface, rethread suitable cleaning method, the attachment that part attached to shell form tooth correction device also can be got rid of, improves shell form tooth correction device's product yield.

The first preset angle is 15 ° or more and 30 ° or less. Thus, most of the gasified material adhering to the surface of the shell-shaped orthodontic appliance can be blown away, thereby achieving a better air blowing effect.

In addition, the first pressure is preset to be greater than or equal to 0.1MPa and less than or equal to 0.70MPa. Therefore, the phenomenon that enough acting force cannot be generated on gasified substances due to too small blowing pressure intensity can be avoided, and the position deviation of the shell-shaped tooth appliance to be cut during cutting due to too large blowing pressure intensity can also be avoided.

In addition, a second distance is formed between the central point of the air blowing opening of the air blowing device and a cutting plane at the cutting position point in the to-be-cut surface of the shell-shaped tooth appliance to be cut, and the pressure intensity of one end, far away from the central point of the air blowing opening, of the air blowing device is a second pressure intensity, wherein the second distance is larger than or equal to 5mm and smaller than or equal to 35mm, the second pressure intensity is larger than or equal to 0.15MPa and smaller than or equal to 0.75MPa, and the diameter of the air blowing opening of the air blowing device is larger than or equal to 1mm and smaller than or equal to 3mm. Therefore, the air flow blown out from the air blowing opening can still generate enough acting force on the gasified substances when reaching the shell-shaped tooth appliance, and the air blowing device can not collide with the shell-shaped tooth appliance in the cutting process because the air blowing device is closer to the surface to be cut of the shell-shaped tooth appliance.

In addition, the second preset angle is greater than or equal to 0 degrees and less than or equal to 15 degrees. Therefore, even if the center line of the air flow is not coplanar with the center line of the laser beam, a better air blowing effect can still be achieved.

In addition, the distance between the incident central point of the airflow and the normal plane is 0 mm-4.5 mm. Therefore, the air blowing effect can be prevented from being influenced by overlarge deviation of the distance of the air flow relative to the position of the laser beam reaching the surface of the shell-shaped tooth appliance.

In addition, the appliance cutting system also comprises a shell, the air blowing pipe is installed on one side face of the shell through a fixing support, the air blowing opening of the air blowing pipe is located above the laser output device, and the air blowing opening and the laser output opening of the laser output device are both arranged towards the appliance to be cut for the shell-shaped teeth. Therefore, a cutting space can be provided for the shell-shaped tooth appliance during cutting through the shell, and the installation of the air blowing pipe and the laser output device is convenient.

In addition, the fixed support comprises a first part and a second part, the first part is arranged in parallel with the central line direction of the blowing pipe, the second part is formed by bending and extending from the edge of the first part in parallel with the laser beam direction, the blowing pipe is installed on the first part of the fixed support, and the fixed support is fixedly installed on the shell through the second part. Therefore, a fixing base can be provided for the blowing pipe through the fixing bracket, the fixing of the blowing pipe is convenient to realize, and meanwhile, the fixing with the support can be realized through the second part of the fixing bracket. Meanwhile, the first preset angle required by the direction of the airflow blown out from the air blowing pipe can be conveniently determined when the fixed support is installed.

The first portion is flat, and the blowpipe is fixed to the first portion such that the center line direction of the blowpipe is parallel to the first portion. Thus, the preset angle of the direction of the air flow blown out from the air blowing pipe can be determined according to the installation angle of the first part of the fixed bracket.

In addition, the second portion is flat, and is fixed to the housing in parallel to the output direction of the laser beam. Thus, the included angle between the direction of the air flow blown out from the air blowing pipe and the direction of the laser beam can be determined according to the installation angle of the second portion of the fixing bracket.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a schematic structural view of an appliance cutting system provided in an embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of section E of FIG. 1;

FIG. 3 is a schematic diagram of a preset distance of an air blowing device provided in an embodiment of the present application;

FIG. 4 is a schematic top view of the dental model in some cases;

FIG. 5 is a schematic top view of the appliance to be cut overlaid on the dental model after lamination;

FIG. 6 is a schematic view of an installation configuration of the appliance cutting system including a shell according to an embodiment of the present disclosure;

fig. 7 is an enlarged schematic view of a portion F in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following describes each embodiment of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in various embodiments of the present application in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.

The shell-shaped tooth appliance is used as a dental medical appliance for correcting tooth deformity, and compared with a metal wire type tooth appliance, the appearance of human teeth cannot be influenced in the correction process. In addition, the shell-shaped tooth appliance has no puncture risk to the peripheral parts of the teeth of the human body, and is convenient for keeping the oral hygiene. Therefore, shell-shaped dental appliances are receiving increasing attention from oral medical personnel.

In the processing process of the shell-shaped tooth appliance, a tooth jaw model needs to be prefabricated according to the tooth jaw characteristics of a human body. Then, performing film pressing on the dental model, cutting and prying the part covered on the teeth of the dental model after film pressing, and thus obtaining the finished product of the shell-shaped dental appliance. Laser cutting has been emerging at present because of the low production efficiency of manual cutting. In the laser cutting process, the cutting position needs to be determined according to the bottom surface of the dental model, then the robot controls the dental model and the shell-shaped tooth appliance covered on the dental model, and the shell-shaped tooth appliance is contacted with a laser beam emitted by the laser head along a preset cutting path, so that cutting is performed. And after the cutting is finished, a finished product of the shell-shaped tooth appliance can be obtained by prying the film.

However, during laser cutting of the film covering the dental model, some material may escape in the form of gasified smoke. If these vaporized substances are not removed in time, they deposit on the surface of the film, and a large amount of deposits are formed near the cutting position. Moreover, these vaporized materials have a very strong adhesion after deposition and are very difficult to handle during subsequent processing. Thus, the product yield of the shell-shaped tooth appliance is influenced, the rejection rate is high, and great waste is caused in the production process.

In order to remove attachment deposits of shell-shaped dental appliances caused by vaporized substances during laser cutting, the embodiments of the present application provide a solution. In the laser cutting process, the shell-shaped tooth appliance is added with the blowing function according to the preset angle and the preset distance, and the blown air flow can blow away the gasified substances by the air when the gasified substances are just generated, so that the gasified substances cannot be attached to the surface of the shell-shaped tooth appliance. Even if some of the gasified material is not completely blown off, the gasified material is blown off by the gas and then rolled on the surface of the shell-shaped dental appliance and then attached, and the adhesion force generated during attachment is also reduced. During subsequent treatment of the shell-shaped dental appliance, these attachments which are not completely blown off and which adhere to the surface of the shell-shaped dental appliance can be removed by means of a suitable cleaning method. After experimental verification, more than 90% of attachments attached to the surface of the shell-shaped dental appliance can be removed, and then a part of the attachments attached to the shell-shaped dental appliance can be removed by a proper cleaning method.

After the air blowing is added to the shell-shaped dental appliance according to the preset angle, the gasified material can be controlled to move to one side of the waste material, and the waste material refers to the residual part of the membrane covered on the dental model after the shell-shaped dental appliance is manufactured by cutting. The method is characterized in that the shell-shaped tooth appliance is controlled to be in a closed state, namely, the airflow is controlled to be blown out from one side, close to the shell-shaped tooth appliance, of the laser beam, and then after the airflow reaches the surface to be cut of the shell-shaped tooth appliance, the airflow can collide with the surface to be cut of the shell-shaped tooth appliance, and the flowing direction is changed. Thereby generating a force to the waste side against the gasified material when encountering the gasified material.

Moreover, since the air blowing function is added at a predetermined angle, that is, the air is not blown to the cutting position of the shell-shaped dental appliance along the direction of the laser beam, the air flow is not blown perpendicularly to the cutting position of the shell-shaped dental appliance. Thus, for the cutting of the membrane, the phenomenon that the surface of the membrane is sunken due to the influence of high-pressure gas because the gas is vertically blown to the cutting position can be avoided.

Meanwhile, the distance of blowing air to the to-be-cut surface of the shell-shaped tooth appliance is controlled, so that the situation that the air blowing structure collides with the shell-shaped tooth appliance in the process that the shell-shaped tooth appliance moves according to the preset cutting path because the air blowing structure is closer to the shell-shaped tooth appliance can be avoided, and the situation that the air blowing structure cannot achieve the air blowing effect because the air blowing structure is farther away from the shell-shaped tooth appliance, namely, gasified substances to be attached to the shell-shaped tooth appliance cannot be blown away can also be avoided.

The appliance cutting system provided by the embodiment of the present application will be specifically described below with reference to the structure shown in fig. 1.

As shown in fig. 1, the appliance cutting system provided by the embodiment of the present application includes a jig 10, a laser output device 20, a driving device 30, and an air blowing device 40. The fixture 10 is used for fixing the dental model 50 and a shell-shaped tooth appliance 60 to be cut, which covers the dental model 50 after film pressing; the laser output device 20 is used for outputting a laser beam with preset power to cut the shell-shaped dental appliance 60 to be cut; the driving device 30 is used for driving the fixture 10 to drive the shell-shaped tooth appliance 60 to be cut and the laser output device 20 to generate relative movement along a preset cutting path so as to complete cutting of the shell-shaped tooth appliance 60 to be cut and obtain a shell-shaped tooth appliance; the insufflation means 40 comprises an insufflation tube 41 (shown in fig. 2) connected to a gas source, which insufflation tube 41 blows a gas stream at a predetermined first pressure at a first predetermined angle and at a first predetermined distance towards the shell-shaped dental appliance 60 to be cut.

Wherein the preset first pressure satisfies: the air flow blows the high-temperature gasified substance generated when the shell-shaped tooth appliance 60 to be cut is cut by the laser beam away from the shell-shaped tooth appliance; and presetting the first pressure as the pressure when the airflow reaches the shell-shaped tooth appliance.

The first predetermined angle (angle a in fig. 3) is a line-plane angle between the center line of the airflow and the reference plane. Wherein the reference plane (plane X in fig. 3) is a plane passing through the center line of the laser beam and perpendicular to the normal plane, and the normal plane (plane Y in fig. 3) is a plane passing through the center line of the laser beam and perpendicular to the tangential plane (plane Z in fig. 3) passing through the laser incidence point on the shelllike dental appliance; the air flow blown by the air blowing pipe is positioned above the laser beam output by the laser output device 20 before reaching the shell-shaped tooth appliance 60 to be cut, and the central line of the air flow and the normal plane of the cutting position point in the preset cutting path of the shell-shaped tooth appliance are arranged at a second preset angle.

The first preset distance (distance L1 in fig. 3) is a distance from an incident central point of the air flow on the shell-shaped dental appliance to be cut to the reference plane, the first preset distance is greater than or equal to 0.5mm (millimeter) and less than or equal to a critical height, and the critical height is the smaller height of 1/2 of the highest crown height and 2/3 of the lowest crown height on the shell-shaped dental appliance to be cut, or the critical height is 3mm.

The fixture 10 is a fixing base for a product to be cut, wherein the product to be cut is a membrane covered on the dental model 50 shown in fig. 4 after film pressing, and the membrane is integrated with the dental model 50 after film pressing to form the shell-shaped dental appliance 60 shown in fig. 5. The shell-shaped dental appliance can be finally obtained by cutting and prying the film covering the dental model 50. In the appliance cutting system, the fixture 10 can fix the dental model 50 and the membrane covering the dental model 50 by vacuum adsorption. In the actual fixing process, the vacuum chuck in the fixture 10 can suck the dental model 50, and can also suck the membrane covering the dental model 50, so that the fixture can play a role in fixing. Meanwhile, the positions and the number of the vacuum chucks in the jig 10 may be determined according to actual circumstances.

The laser output device 20 is a portion of the appliance cutting system that generates laser light and outputs the laser beam outward. The laser output device 20 may include a laser light source, a power controller, a reflector, and a mounting base, wherein laser light generated by the laser light source reaches the reflector after the output power of the laser light is adjusted by the power controller, and is then output outwards. The laser output device 20 may be mounted to a preset position through a mounting base.

The driving device 30 is a power source for driving the fixture 10 and the laser output device 20 to move relatively, and during the cutting process of the shell-shaped dental appliance, the dental jaw model 50 fixed on the fixture 10 and the shell-shaped dental appliance 60 to be cut need to be contacted with the laser beam along a preset cutting path. Since the entire shape of the dental model 50 is irregular, the driving device 30 may employ a robot arm to facilitate driving the jig 10 for a complicated movement.

The air blowing means 40 is for blowing an air current from one side of the laser beam toward the shell-shaped dental appliance 60 to be cut and blowing the gasified material generated when the shell-shaped dental appliance 60 to be cut is cut toward the scrap side. Meanwhile, high heat generated during laser cutting can be continuously taken away. The air blowing means 40 may be provided in the vicinity of the laser output device 20 for the purpose of blowing off the vaporized substance to be adhered to the shell-shaped dental appliances. In the actual installation process, the air blowing device 40 can be arranged according to the required air blowing angle and air blowing distance. The blowing device 40 may include a blowing pipe 41, and the blowing pipe 41 is connected to a gas source, and the pressure of the blown gas flow can be adjusted by a valve. The blowing device 40 may be fixed to the laser output device 20 or may be fixed to the same support as the laser output device 20.

It should be noted that there are two factors of the air blowing angle and the air blowing distance when the position of the air blowing device 40 is arranged. The first preset angle is set to ensure that the gasified material can be blown away to the waste material side after the airflow reaches the shell-shaped tooth appliance 60 to be cut. The second predetermined angle is such that the gas flow centerline is still capable of blowing vaporized material away from the shell-shaped dental appliance even when the gas flow centerline is out of plane with the laser beam centerline. The first preset distance is set so that after the airflow blown out from the air blowing pipe 41 of the air blowing device 40 collides with the surface of the shell-shaped tooth appliance 60 to be cut, most of the gas can exert an acting force on the encountered gasified substances after changing the direction of one side of the waste, so that the gasified substances spreading to the vicinity of the cutting position of the shell-shaped tooth appliance during cutting are blown away by the gas. The first preset distance may be achieved by controlling the distance between the blowing pipe 41 of the blowing device 40 and the laser beam.

In some embodiments of the present application, the first predetermined distance may be greater than or equal to 0.5mm and less than or equal to the critical height.

By setting a proper first preset distance, the phenomenon that the gasified material spreading to the position near the cutting position of the shell-shaped tooth appliance 60 to be cut cannot be blown away due to the fact that the air flow directly blows to the cutting position of the shell-shaped tooth appliance 60 to be cut or the first preset distance is too small can be avoided, and the phenomenon that the air flow path is staggered from the position of the gasified material due to the fact that the first preset distance is too large can also be avoided.

In the enlarged configuration shown in FIG. 3, it can be seen that the air stream collides with the surface of the shell-shaped dental appliance 60 to be cut after it reaches the surface of the shell-shaped dental appliance 60 to be cut. A small part of the gas flow escapes from above the plane of the drawing in fig. 3, and a large part of the gas flow flows in the direction of change to below the plane of the drawing in fig. 3, thereby ensuring that the gas meets the gasified material during the flow and blows the gasified material away to the waste side.

The appliance cutting system provided by the embodiment of the application increases the air blowing device 40 to blow air flow with preset pressure to the shell-shaped tooth appliance 60 to be cut along a preset angle and at a preset distance. Wherein, through controlling the angle of the air current blown out by the air blowing device 40, the gasified substance generated during the laser cutting can be blown away by the air to the waste material side, thereby being unable to be attached and deposited on the surface of the shell-shaped tooth appliance. And the distance of the air flow blown out by the air blowing device 40 can be controlled to achieve a better air blowing effect so as to generate enough acting force on the gasified substances generated during laser cutting. Therefore, the attachment effect of the gasified substances on the surface of the shell-shaped tooth appliance is reduced through the air flow blown out by the air blowing device 40, and then through a proper cleaning method, part of attachments attached to the shell-shaped tooth appliance can be removed, so that the product yield of the shell-shaped tooth appliance is improved.

In some embodiments of the present application, the first preset angle may be equal to or greater than 15 ° (degrees) and equal to or less than 30 °.

When the first preset angle is within the range of 15-30 degrees, most of gasified substances attached to the surface of the shell-shaped tooth appliance can be blown away, so that a better blowing effect is achieved. As in some cases, when the first preset angle is set to 20 °, attachment on the cut shell-shaped dental appliance can be removed by more than 90%.

In some embodiments of the present application, the first pressure may be greater than or equal to 0.1MPa (megapascals) and less than or equal to 0.70MPa.

In the case where the air blowing means 40 has different air blowing pressures, the flow rates of the air blown out from the air blowing means 40 are different, and thus the flow rates of the air reaching the surface to be cut of the shell-shaped dental appliance 60 to be cut are different. In order to ensure that the gas can well blow away vaporized material generated during laser cutting, the pressure of the gas stream reaching the surface of the shell-shaped dental appliance 60 to be cut can be maintained within the range of 0.1MPa to 0.75 MPa. Thereby avoiding that enough acting force can not be generated to gasified materials due to over-small blowing pressure intensity and avoiding the position deviation of the shell-shaped tooth appliance 60 to be cut when the shell-shaped tooth appliance is cut due to over-large blowing pressure intensity.

In some embodiments of the present application, a second distance (distance L2 in fig. 3) may be set between a central point of an air blowing opening of the air blowing device and a cutting plane at a cutting position point in a to-be-cut surface of the shell-shaped dental appliance to be cut, and the pressure at an end of the air blowing device away from the central point of the air blowing opening is a second pressure, where the second distance may be greater than or equal to 5mm, and less than or equal to 35mm, the second pressure may be greater than or equal to 0.15MPa, and less than or equal to 0.75MPa, and a diameter of the air blowing opening of the air blowing device is greater than or equal to 1mm, and less than or equal to 3mm.

It should be noted that the distance between the air flow blown out from the air blowing opening of the air blowing device and the shell-shaped tooth appliance, the pressure when the air flow enters the air blowing pipe (i.e. the pressure at the end of the air blowing device far away from the center point of the air blowing opening), and the diameter of the air blowing opening of the air blowing device all affect the pressure when the air flow reaches the shell-shaped tooth appliance. By maintaining the second distance within the range of 5mm to 35mm, the second pressure within the range of 0.15MPa to 0.75MPa and the diameter of the air blowing opening within the range of 1mm to 3mm, the air flow blown out from the air blowing opening can still generate enough acting force on the gasified substances when reaching the shell-shaped tooth appliance after being mixed with the ambient air. Meanwhile, by setting the appropriate second distance, it can be ensured that the air blowing device does not collide with the shell-shaped dental appliance 60 in the cutting process because it is closer to the surface to be cut of the shell-shaped dental appliance.

In some embodiments of the present application, the second preset angle may be equal to or greater than 0 ° and equal to or less than 15 °.

When the second preset angle is 0 degrees, namely the air flow central line and the laser beam central line are coplanar, and when the second preset angle is larger than 0 degrees and smaller than or equal to 15 degrees, namely the air flow central line and the laser beam central line are out of plane. In the case where the center line of the air flow is coplanar with the center line of the laser beam, the air flow is kept in agreement with the laser beam, so that a good air blowing effect can be produced to the shell-shaped dental appliance 60 to be cut. Under the condition that the central line of the air flow is not coplanar with the central line of the laser beam, the angle of the air flow deviating from the normal plane of the cutting position point in the preset cutting path of the shell-shaped dental appliance is controlled within 15 degrees, so that the air flow can be ensured to generate better blowing-off effect on high-temperature gasified substances generated during cutting after reaching the shell-shaped dental appliance.

In some embodiments of the present application, the distance between the incident center point of the gas flow and the normal plane is 0mm to 4.5mm.

When the distance between the incident central point of the air flow and the normal plane is 0mm, namely the incident central point of the air flow and the incident point of the laser beam are both positioned on the normal plane, at the moment, the air flow and the laser beam synchronously reach the surface of the shell-shaped tooth appliance. And when the distance between the incident central point of the air flow and the normal plane is more than 0mm and less than or equal to 4.5mm, the position of the air flow relative to the laser beam reaching the surface of the shell-shaped dental appliance is advanced or delayed on the preset cutting path.

The distance between the incident central point of the air flow and the normal plane of the cutting position point in the preset cutting path of the shell-shaped tooth appliance is controlled within the range of 0mm to 4.5mm, so that the air flow can achieve a good air blowing effect, and the air blowing effect is prevented from being influenced due to overlarge deviation of the distance between the air flow and the position where the laser beam reaches the surface of the shell-shaped tooth appliance.

In some embodiments of the present application, the appliance cutting system may further comprise a housing, the gas blowing pipe 41 may be mounted on a side of the housing by a fixing bracket 42, a blowing port of the gas blowing pipe 41 is located above the laser output device 20, and the blowing port and the laser output device 20 are both disposed toward the shell-shaped dental appliance 60 to be cut.

As shown in FIGS. 6 and 7, in some embodiments of the present application, the shell 100 of the appliance cutting system has a top surface 101, a bottom surface 102 and a plurality of side surfaces 103 between the top surface 101 and the bottom surface 102, the insufflation tube 41 is mounted to one side surface 103 of the shell 100 via a mounting bracket 42, the laser output device 20 is positioned adjacent to that side surface 103, and the drive device 30 is mounted to the bottom surface 102 of the shell 100.

The shell 100 is a part for providing a cutting space for cutting the shell-shaped dental appliance, and the laser output device 20, the air blowing device 40 and the driving device 30 may be installed on the shell 100 at a previously designed position or installed adjacent to the shell 100.

The blowpipe 41 serves as a discharge passage for the assist gas in laser cutting, and is an important part for ensuring the blow-off of the adhering matter. The shape, size and mounting location of the gas blowing tube 41 have a significant impact on the control of the gas flow and the efficiency and quality of the laser cutting.

In order to stabilize the air flow blown out from the blowpipe 41, the blowpipe 41 may be provided in a straight line shape, and one end of the air flow blown out from the blowpipe 41 may be provided to extend in an equal diameter to stabilize the air flow blown out from the blowpipe 41. In some embodiments, the inner diameter of insufflation tube 41 may be 1mm to 3mm. The length of the gas blowing pipe 41 may be 50mm to 100mm. In some cases, a portion of the lumen of insufflation tube 41 may also be tapered for the purpose of accelerating the gas.

In addition, the material of the blowing pipe 41 may be a metal material with high strength, such as an iron pipe, a copper pipe or a stainless steel pipe.

The fixing bracket 42 may be fixed separately or fixed with the laser output device 20 according to the fixing requirement of the blowing pipe 41. Meanwhile, the shape and structure of the fixing bracket 42 may also be determined according to actual conditions. The mounting of the insufflation tube 41 is facilitated by the mounting bracket 42 and the insufflation tube 41 is mounted above the laser output device 20 via the mounting bracket 42, i.e. by blowing air into the shell-shaped dental appliance in the state shown in figure 6, the vaporized material can be moved away from the surface of the shell-shaped dental appliance under the action of the force exerted by the air flow and gravity. Meanwhile, the shell-shaped tooth appliance is cut along the horizontal direction, so that the cutting condition can be conveniently observed by a worker.

In some embodiments of the present application, the fixing bracket 42 may include a first portion 421 disposed parallel to a center line direction of the blowing pipe 41, and a second portion 422 formed by bending and extending from an edge of the first portion parallel to the laser beam direction, the blowing pipe being mounted on the first portion of the fixing bracket, and the fixing bracket being fixedly mounted on the housing through the second portion.

The first part 421 is a part of the fixing bracket 42 for installing the blowing pipe 41, and the second part 422 is a part of the fixing bracket 42 fixed with a support, which can be a column or a box part installed on the ground. The first portion 421 and the second portion 422 may be integrally formed, or may be connected together in a split structure. Alternatively, first portion 421 may be secured to insufflation tube 41 using screws.

In some embodiments of the present application, each of the first portion 421 and the second portion 422 may be provided in a plate shape, that is, the first portion 421 has a flat plate shape, the blowpipe 41 is fixed to the first portion 421 in such a manner that a center line direction of the blowpipe 41 is parallel to the first portion 421, the second portion 422 has a flat plate shape, and the second portion 422 is fixed to the housing 100 in such a manner that it is parallel to an output direction of the laser beam.

It should be noted that the second portion 422 may extend from the edge of the first portion 421 in a bending manner along the traveling direction of the laser beam, or may extend from the edge of the first portion 421 in a bending manner along the direction opposite to the traveling direction of the laser beam. The first portion 421 and the second portion 422 may have different lengths, widths and thicknesses according to the size of the space and the desired installation position. Meanwhile, the bending angle between the extending direction of the first portion 421 and the second portion 422 may be set according to a first preset angle. In the case where the first portion 421 is parallel to the central axis direction of the blowpipe 41 and the second portion 422 is parallel to the laser beam output direction, the bending angle between the extending direction of the first portion 421 and the second portion 422 is equal to the first preset angle.

In order to adjust the included angle between the direction of the air flow and the direction of the laser beam output by the laser output device 20, the first portion 421 and the second portion 422 can be connected together in a relatively rotatable manner. As in some embodiments, the first portion 421 and the second portion 422 can be fixed by a rotating shaft. Meanwhile, the bending angle between the extending direction of the first portion 421 and the second portion 422 may be other specific angles, such as greater than the first preset angle or less than the first preset angle, as long as the blow pipe 41 can be installed to the preset position.

In addition, in order to accommodate the installation position of the gas blowing pipe 41, the fixing bracket 42 may further include a third portion 423 (shown in fig. 7) having a plate shape, the third portion 423 being disposed between the first portion 421 and the second portion 422, and the third portion 423 may be disposed in a direction perpendicular to the laser beam.

In some embodiments of the present application, the insufflation apparatus 40 may further include a gas line connector 43, the gas line connector 43 being connected to an end of the insufflation tube 41 remote from the clamp 10.

The air pipe connector 43 is a component for connecting two different pipes, and the air blowing pipe 41 can be conveniently connected to a pipe for outputting air flow, such as an air supply pipe in an air pressure system, through the air pipe connector 43.

In some embodiments of the present application, the gas stream blown out by the gas blowing device 40 includes one or more of oxygen, nitrogen, carbon dioxide, and atmospheric air.

When laser cutting is performed, different types of assist gases are used, and the effect produced during cutting is different. For example, in the case of using oxygen as the main assist gas, since oxygen can promote oxidation of the material, it is possible to increase the cutting speed while blowing away the gasified substance. In the case of using an inert gas such as nitrogen as a main auxiliary gas, the gasified substance generated by melting the diaphragm at a high temperature can be blown away, and the gasified substance is prevented from adhering to the surface of the shell-shaped dental appliance to form an adhesive substance.

In some embodiments of the present application, the drive device 30 may employ at least a three-axis robotic arm.

For example, the drive device 30 may be a three-axis robot, a four-axis robot, a five-axis robot, or a six-axis robot. In general, the cutting path of the shell-shaped dental appliance 60 to be cut is complicated, and particularly, dental models 50 with different sizes can be obtained according to actual conditions of dental structures of different patients, so that the shapes of the cutting positions of the shell-shaped dental appliance are variable. And the mechanical arm with higher degree of freedom can be flexibly moved. Meanwhile, if the barrier is blocked during cutting, the cutting can be avoided in time, the cutting is prevented from being blocked, the cutting damage to the non-cutting path part of the shell-shaped tooth appliance is avoided, and therefore the output effect of the shell-shaped tooth appliance is prevented from being influenced.

Some embodiments of the present application further provide a cutting method of the appliance cutting system, the cutting method including the steps of:

the clamp 10 fixes the dental model and the shell-shaped tooth appliance to be cut which covers the dental model after film pressing;

the laser output device outputs laser beams with preset power to cut the shell-shaped tooth appliance to be cut;

the driving device 30 drives the clamp 10 to drive the shell-shaped tooth appliance to be cut and the laser output device 20 to generate relative movement along a preset cutting path so as to cut the shell-shaped tooth appliance to be cut, and simultaneously, an air blowing pipe of the air blowing device 40 blows air flow with preset first pressure intensity to the shell-shaped tooth appliance 60 to be cut along a first preset angle and a first preset distance so as to blow high-temperature gasified substances generated when the shell-shaped tooth appliance to be cut is cut by laser beams away from the shell-shaped tooth appliance;

and finishing laser cutting to obtain the shell-shaped tooth appliance.

According to the cutting method provided by the embodiment of the application, the air blowing device 40 is additionally arranged to blow air flow with preset pressure to the shell-shaped tooth appliance 60 to be cut along a preset angle and at a preset distance. Wherein, through controlling the angle of the air current blown out by the air blowing device 40, the gasified substance generated during the laser cutting can be blown away by the air to the waste material side, thereby being incapable of being absorbed and deposited on the surface of the shell-shaped tooth appliance to form attachments. And the distance of the air flow blown out by the air blowing device 40 can be controlled to achieve a better air blowing effect so as to generate enough acting force on the gasified substances generated during laser cutting. Thereby reducing the adhesion effect of the gasified substances on the surface of the shell-shaped tooth appliance through the air flow blown out by the air blowing device 40 and improving the product yield of the shell-shaped tooth appliance.

The first preset distance may be set according to a specific condition of the orthodontic object to which the shell-shaped tooth appliance is applied. As in some cases, the first predetermined distance may be greater than or equal to 0.5mm and less than or equal to the lesser of 1/2 of the highest crown height and 2/3 of the lowest crown height on the shell-shaped dental appliance 60 to be cut. Under this situation, according to the specific situation of the different crowns of the correcting object of the shell-shaped tooth correcting device, the size of the first preset distance is designed, the attachment effect of the gasified substances in the distance range is reduced, and the appearance effect of the shell-shaped tooth correcting device in the correcting process can be prevented from being influenced.

In other cases, the first predetermined distance may be greater than or equal to 0.5mm and less than or equal to 3mm. Under the condition, the size of the first preset distance is designed according to the cutting position of the dental model, so that the problem of deposition of gasified substances on the shell-shaped dental appliance in the cutting process can be solved well.

The first pressure may be 0.1MPa or more and 0.70MPa or less.

In order to ensure that the gas can well blow away the gasified substances generated during the laser cutting, the blowing pressure of the blowing device 40 can be set to be 0.1MPa to 0.70MPa. Thereby avoiding that enough acting force can not be generated to gasified materials due to over-small blowing pressure intensity and avoiding the position deviation of the shell-shaped tooth appliance 60 to be cut when the shell-shaped tooth appliance is cut due to over-large blowing pressure intensity.

Table 1 below illustrates the effect of the attachment being processed in the actual cutting process, wherein the membrane used for cutting the shell-shaped dental appliance in table 1 is PETG (Polyethylene Terephthalate, cyclohexanediol), and the thickness of the membrane is 1.0mm. Table 1 provides the results of five tests for each set of tests. By changing the first preset distance, different treatment effects can be obtained. The group with the first preset distance of 0 is the control group.

Table 1: attached matter treated effect table (the treated effect of the attached matter in the table refers to the removed proportion of the attached matter, P refers to second pressure, phi refers to the inner diameter of the air blowing pipe)

It can be seen from table 1 that in the three-group test with the first preset distance of 0.5mm, 1.5mm and 3mm, the attachment treatment effect all reaches more than 90%, which indicates that the attachment effect of the gasified material on the surface of the shell-shaped tooth appliance can be reduced by increasing the airflow blown out from the blowing device 40 to the shell-shaped tooth appliance 60 to be cut, thereby improving the product yield of the shell-shaped tooth appliance. Meanwhile, it is also shown that when the air blowing device directly blows air flow to the cutting position of the shell-shaped tooth appliance 60 to be cut (i.e. the first preset distance is 0), the effect of processing the attachment is obviously poorer than that of the other three groups.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.

Claims

1. An appliance cutting system for cutting of a shell-like dental appliance, comprising:

the driving device is used for driving the clamp to drive the shell-shaped tooth appliance to be cut and the laser output device to generate relative movement along a preset cutting path so as to complete cutting of the shell-shaped tooth appliance to be cut and obtain the shell-shaped tooth appliance;

the preset first pressure satisfies: causing the gas stream to blow away from the shell-shaped dental appliance high-temperature vaporized material produced when the laser beam cuts the shell-shaped dental appliance to be cut; and the preset first pressure is the pressure when the airflow reaches the shell-shaped dental appliance;

the first preset angle is a line-surface included angle between a center line of the airflow and a reference plane, wherein the reference plane is a plane which passes through the center line of the laser beam and is perpendicular to a normal plane, and the normal plane is a plane which passes through the center line of the laser beam and is perpendicular to a tangential plane passing through an incident point of the laser beam on the shell-shaped tooth appliance; the air flow blown by the air blowing pipe is positioned above the laser beam output by the laser output device before reaching the shell-shaped tooth appliance to be cut, and the central line of the air flow and the normal plane of the cutting position point in the preset cutting path of the shell-shaped tooth appliance are arranged at a second preset angle;

the first preset distance is the distance from the incident central point of the airflow on the shell-shaped tooth appliance to be cut to the reference surface, the first preset distance is more than or equal to 0.5mm and less than or equal to a critical height, and the critical height is the smaller height of 1/2 of the highest crown height and 2/3 of the lowest crown height on the shell-shaped tooth appliance to be cut, or the critical height is 3mm;

the first preset angle is larger than or equal to 15 degrees and smaller than or equal to 30 degrees.

2. The appliance cutting system of claim 1, wherein: the preset first pressure is greater than or equal to 0.10MPa and less than or equal to 0.70MPa.

3. The appliance cutting system of claim 1, wherein: the blowing device is characterized in that a second distance is arranged between a blowing opening central point and a cutting plane of a cutting position point in a to-be-cut shell-shaped tooth appliance to be cut, the blowing device is far away from the pressure of one end of the blowing opening central point and is a second pressure, wherein the second distance is more than or equal to 5mm and less than or equal to 35mm, the second pressure is more than or equal to 0.15MPa and less than or equal to 0.75MPa, and the diameter of a blowing opening of the blowing device is more than or equal to 1mm and less than or equal to 3mm.

4. The appliance cutting system of any one of claims 1 to 3, wherein: the second preset angle is greater than or equal to 0 degrees and less than or equal to 15 degrees.

5. The appliance cutting system of any one of claims 1 to 3, wherein: the distance between the incident central point of the airflow and the normal plane is 0-4.5 mm.

6. The appliance cutting system of claim 1, wherein: the shell-shaped tooth appliance is characterized by further comprising a shell, wherein the air blowing pipe is installed on one side face of the shell through a fixing support, an air blowing opening of the air blowing pipe is located above the laser output device, and the air blowing opening and a laser output opening of the laser output device face towards the shell-shaped tooth appliance to be cut.

7. The appliance cutting system of claim 6, wherein: the fixing support comprises a first part and a second part, the first part is arranged in parallel to the central line direction of the air blowing pipe, the second part is formed by bending and extending from the edge of the first part in parallel to the laser beam direction, the air blowing pipe is installed on the first part of the fixing support, and the fixing support is fixedly installed on the shell through the second part.

8. The appliance cutting system of claim 7, wherein: the first part is in a flat plate shape, and the air blowing pipe is fixed to the first part in a manner that the central line direction of the air blowing pipe is parallel to the first part.

9. The appliance cutting system of claim 7 or 8, wherein: the second portion is flat, and is fixed to the housing in a manner parallel to the output direction of the laser beam.