JP2018033587A - Machining calculation program, machining calculation apparatus, and cad/cam system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining calculation program capable of highly efficiently determining machining material data.SOLUTION: A program for determining a machining material to be used, on the basis of shape data of a dental prosthesis (1) includes the steps of: superimposedly displaying a plurality of machining material data (60, 61, and 62) obtained by digitizing shapes of a plurality of machining materials with different dimensions and/or shapes; displaying dental prosthesis data (51) obtained by digitizing the shapes of dental prosthesis, superimposed on the superimposedly displayed machining material data; and determining whether or not the whole of the dental prosthesis data is contained inside the machining material data.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a processing operation program, a processing operation device, and a CAD / CAM system for a dental prosthesis.

  When a dental prosthesis is manufactured by performing cutting using an NC (Numerical Control machining) processing machine, a dental CAD / CAM system is used as described in Patent Document 1 and Non-Patent Document 1, for example. A dental CAD / CAM system is a scanner that measures abutment teeth and acquires three-dimensional shape data, and a design device (CAD device) that designs a prosthesis from the acquired three-dimensional shape data and forms prosthetic data. A processing operation device (CAM device) that calculates NC data for the processing machine based on the prosthesis data output from the design device, and a dental prosthesis by processing the material in accordance with a command from the processing operation device A processing apparatus to be manufactured is provided. These scanner, design device, processing operation device, and processing device exist in an independent state to constitute a dental CAD / CAM system, or at least two of these functions are merged into one. Some are also available.

  Of the CAD / CAM systems, a machining operation device (CAM device) calculates a process and a tool used in each process so that the machining is efficiently performed based on the dental prosthesis data output from the design apparatus. .

JP 2002-224142 A

GC Corporation, “Aadva Soft L-CAM Instruction Manual”, issued on April 11, 2016, page 24

  Since the dental prosthesis to be produced has various sizes and shapes, usually, a plurality of shapes (rectangular bodies, legislative bodies, cylinders, etc.) and sizes of processing materials are prepared, and appropriate materials are selected each time. . Here, selection of an appropriate material is performed from the viewpoint of achieving a size and shape that is not wasted as much as possible. Such processing material selection is performed by laying out dental prosthesis data in the processing material data by a processing arithmetic device.

  The smaller the processed material, the less the raw material used, so the smaller the processed material, the lower the cost. Therefore, the operator tries to lay out the dental prosthesis data on the smallest possible processing material data.

  The layout of the processed material data is performed by the operator rotating or moving the dental prosthesis data on the screen. However, the operator selects the plurality of processed material data in ascending order of size. Do the layout. If the dental prosthesis data does not fit in the processed material data, the next largest processed material data is called and layout is performed again. Since this process is repeated until processing material data that can be finally laid out is obtained, it takes a lot of labor and time to determine processing material data to be used.

  In view of the above problems, an object of the present invention is to provide a machining calculation program that can efficiently determine machining material data. Further, a machining operation device and a CAD / CAM system provided with this program are provided.

  The present invention will be described below. Here, for ease of understanding, reference numerals attached to the drawings are described in parentheses, but the present invention is not limited thereto.

  One form of the present invention is a program for determining a processing material to be used based on shape data of a dental prosthesis (1), and is configured to determine the shapes of a plurality of processing materials having different sizes and / or shapes. A procedure for superimposing and displaying a plurality of processed material data (60, 61, 62) converted into data, and a dental prosthesis data (51) in which the shape of the dental prosthesis is converted into the superimposed processed material data Is a processing calculation program that includes a procedure for displaying and superimposing and a procedure for determining whether all of the dental prosthesis data is included inside the processing material data.

  Priorities may be determined in advance for application to a plurality of processed material data.

  Further, the processing material data (60, 61, 62) displayed in a superimposed manner further includes a procedure of notifying the processing material data in which all of the dental prosthesis data is included inside the processing material data. May be.

  A receiving means (35) for receiving the shape data of the dental prosthesis, a storage means (34) for storing the above-described processing operation program, and an operation means for calculating the processing operation program based on the shape data received by the receiving means. It is possible to provide a machining operation device (30) comprising (32) and an output device (38) for outputting the result of the operation means.

  Also, a three-dimensional data reading device (10) for generating three-dimensional shape data, a design device (20) for creating shape data of a dental prosthesis based on the three-dimensional shape data, and a dental prosthesis created by the design device CAD / CAM system (50) comprising the above-described processing operation device (30) that receives the shape data of the dental prosthesis and calculates the processing procedure of the dental prosthesis, and the processing device (40) that performs processing according to the processing procedure by the processing operation device. ) Can be provided.

  According to the present invention, since it is determined whether or not there is a part where the model protrudes from the material, it is possible to quickly select the material, so that time and labor can be reduced.

It is a figure explaining the structure of the dental prosthesis. 1 is a block diagram conceptually showing a CAD / CAM system 50. FIG. 2 is a block diagram conceptually showing the structure of a processing operation device 30. FIG. It is a figure which shows the flow of manufacturing method S1 of a dental prosthesis. It is a figure which shows the flow of preparation process S30 of NC data. FIG. 6A is a diagram for explaining a process of arrangement and determination on processed material data, and FIG. 6B is a diagram from another viewpoint explaining a process of arrangement and determination on processed material data. .

  The above-described operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these embodiments.

First, an example of a dental prosthesis to be manufactured will be described. FIG. 1 schematically shows the appearance of a dental prosthesis 1 having a holding projection 2. FIG. 1A shows a dental prosthesis 1 in plan view and FIG. 1B in front view.
The dental prosthesis 1 is a kind of dental prosthesis called a crown, and is formed in a container shape as a whole. Therefore, it has the outer surface 1a and the inner surface 1b. In FIG. 1 (a) and FIG. 1 (b), the inner surface 1b is transparently shown by a broken line. The crown, which is in the shape of a container, is covered over the treated tooth, for example, to cover and protect the treatment site.
Since the dental prosthesis 1 is arranged so as to cover the occlusal surface of the tooth in this way, it is necessary to form an occlusal surface also on the dental prosthesis part 1, so that it corresponds to the fissure of the tooth. There is a fissure 1 c of the dental prosthesis 1.
As described above, the external shape of the dental prosthesis 1 is complicated, and the shape of the dental prosthesis 1 varies greatly depending on the tooth part and the person to be applied.

  Here, at the time of processing, it has a holding projection 2 that is a part to be held by the processing device 40 by being gripped by a processing device 40 (see FIG. 2) from a part of the outer surface 1a. The holding protrusion 2 is finally excluded and becomes the dental prosthesis 1.

  Next, one form of CAD / CAM system will be described. FIG. 2 is a diagram for explaining one embodiment, and is a block diagram conceptually showing the configuration of a CAD / CAM system 50 (hereinafter sometimes referred to as “system 50”). The system 50 includes a three-dimensional data reading device 10, a design device 20, a processing operation device 30, and a processing device 40.

  The three-dimensional data reading device 10 generates three-dimensional shape data such as a tooth to which the dental prosthesis 1 is applied or an abutment tooth model imitating the tooth. As a result, the tooth shape is converted into three-dimensional data. A known device can be used as the three-dimensional data reading device 10, for example, a contact type scanner that measures by contacting a probe, or a non-contact type scanner that measures using a laser or light.

  The design device 20 is means for taking in the three-dimensional shape data obtained by the three-dimensional data reading device 10 and designing the shape data of the dental prosthesis corresponding to the three-dimensional shape data. For example, based on the acquired three-dimensional shape data, prototype data of a candidate dental prosthesis can be selected from a database, and the selected prototype data can be changed to match the three-dimensional shape data. An example of such a design apparatus 20 is a CAD apparatus, and a known apparatus can be used.

  The processing operation device 30 includes a plurality of processes prepared from the shape data of the dental prosthesis designed by the design device 20, the data of the type and form of the tool provided in the processing machine, the data of the material actually processed, and the like. This is a means for generating NC data instructing a processing operation for the processing machine to produce a dental prosthesis based on one processing material selected from the materials, and transmitting the NC data to the processing apparatus 40. In addition, as will be described later, the processing operation device 30 of the present embodiment is configured to perform an operation for efficiently selecting a processing material. Examples of such a processing operation device 30 include a CAM device.

  FIG. 3 is a block diagram conceptually showing the configuration included in the processing operation device 30. The processing arithmetic device 30 includes an arithmetic device 31, an input device 37, and an output device 38. The arithmetic device 31 includes an arithmetic means 32, a RAM 33, a storage means 34, a receiving means 35, and an output means 36. The input device 37 includes a keyboard 37a, a mouse 37b, an external storage device 37c that functions as one of storage media, and a communication device 37d.

  The calculation means 32 is constituted by a so-called CPU (central operator), and is a means that is connected to each of the above-described constituent members and can control them. In addition, the program 34a is executed while selecting from various databases 34b stored in the storage means 34 or the like functioning as a storage medium, and functions as a means for performing calculations and various data described later based on the program 34a. . Although details of the calculation will be described later, machining procedure calculation, tool selection calculation, calculation of machining conditions, calculation for selecting a machining material, and the like can be given. It is possible to list NC data which is a command to.

  The RAM 33 is a structural member that functions as a work area for the computing means 32 and a temporary data storage means. The RAM 33 can be configured by SRAM, DRAM, flash memory, or the like, and is similar to a known RAM.

The storage means 34 is a structural member that functions as a storage medium in which various programs 34a and a database 34b that serve as a basis for obtaining the above-described calculation and data to be generated are stored. Here, a calculation program for selecting a machining material can be cited as one of the programs, and a plurality of machining material shape data having different shapes and sizes can be cited as one of the databases 34b.
Further, the storage unit 34 may be capable of storing various intermediate and final results such as NC data obtained by executing the program.

  The receiving means 35 is a structural member having a function for appropriately taking information from the outside into the arithmetic device 32, and is connected to the input means 37. This includes so-called input ports, input connectors, and the like.

  The output means 36 is a component having a function of appropriately outputting information to be output to the outside of the obtained results, and an output device such as a communication device 38a and a display device 38b is connected thereto. This includes so-called output ports, output connectors, and the like.

The input device 37 includes, for example, a keyboard 37a, a mouse 37b, an external storage device 37c, a communication device 37d, and the like. As the keyboard 37a and the mouse 37b, known ones can be used, and the description thereof is omitted.
The external storage device 37c is a known externally connectable storage means and also functions as a storage medium. There is no particular limitation here, and various necessary programs and data can be stored. For example, a program similar to the storage unit 34 described above, NC data obtained by executing the program, or the like may be stored here. A known device can be used as the external storage device 32c. Examples thereof include CD-ROM and CD-ROM drive, DVD and DVD drive, hard disk, and various memories.
The communication device 37d is a means for transmitting data directly from another device to the receiving means 35. For example, the shape data of the dental prosthesis can be transmitted directly from the design device 20 to the receiving means 35.

The output device 38 includes, for example, a communication device 38a and a display device 38b.
The communication device 38a is means for transmitting data obtained to other devices. For example, transmission of processing procedure data to the processing apparatus 40 can be mentioned.
The display device 38b is a device that displays calculation results of various scenes, selection of various functions, and the like. The operator can operate the input device 37 while referring to the display device 38b to cause the arithmetic device 31 to function. As such a display device 38b, a known display device can be applied, and examples thereof include a monitor.

  An example of such a processing operation device 30 is a computer. The computer main body is usually provided with each device corresponding to the arithmetic device 31, and an input device 37 and an output device 38 can be connected thereto.

  Returning to FIG. 2, the processing apparatus 40 will be described. The processing device 40 receives NC data, which is operation instruction data of the processing device generated by the processing arithmetic device 30, extracts a processing material according to the NC data, and executes processing on the processing material. A dental prosthesis is produced from the material. Such a machining apparatus can be a known NC machine tool.

  According to the system 50 including the machining operation device 30 as described above, a machining material to be used can be efficiently obtained as described later.

  In this embodiment, as shown in FIG. 2, the three-dimensional data reading device 10, the design device 20, the processing operation device 30, and the processing device 40 constituting the dental CAD / CAM system 50 are independent from each other. However, this is not necessarily required, and a configuration in which the functions of the plurality of components constituting the dental CAD / CAM system are integrated may be employed. Alternatively, a predetermined function may be separated and added as another device.

  Next, the dental prosthesis manufacturing method S <b> 1 will be described using the CAD / CAM system 50. Here, an example using the CAD / CAM system 50 will be described for the sake of simplicity. However, the present invention is not limited to this, and other systems can be used for dental treatment as long as the method includes the following points. A prosthesis may be manufactured. In addition, this description further understands operations to be performed by each device.

  The flow of the manufacturing method S1 of the dental prosthesis 1 (hereinafter sometimes referred to as “manufacturing method S1”) is shown in FIG. The manufacturing method S1 includes a three-dimensional shape data creation step S10, a dental prosthesis shape data creation step S20, an NC data creation step S30, and a processing step S40. Each process will be described below.

  The three-dimensional shape data creation process S10 (may be referred to as “process S10”) is a process of creating three-dimensional shape data such as an abutment tooth model using the three-dimensional data reader 10 or the like. A known method can be used to create such three-dimensional shape data.

In the dental prosthesis shape data creation process S20 (may be referred to as "process S20"), the three-dimensional shape data obtained in process S10 is acquired, and the design apparatus 20 is used based on the three-dimensional shape data. This is a process of creating object shape data.
The creation of the shape data of such a dental prosthesis can be performed by a method usually performed using a known design device such as CAD.

  The NC data creation process S30 (may be referred to as “process S30”) includes the shape data of the dental prosthesis created in process S20, the shape data of the processing material stored in the database 34b, and the processing device 40. This is a process in which a suitable processing material is selected from the type of tool provided, data on its form, and the like, and the processing apparatus calculates and generates NC data that instructs a processing operation for manufacturing a dental prosthesis. That is, the calculation means 43 calculates NC data from the three-dimensional shape of the obtained dental prosthesis based on the procedure defined by the program 34a stored in the storage means 34 and the database 34b. . More specifically, the calculation is performed as follows by the calculation means 32 and the like. FIG. 5 shows the flow of step S30.

  The process S30 includes a dental prosthesis shape data reading process S31, a process material data arrangement and determination process S32, an NC data calculation process S33, and an NC data output process S34.

  The dental prosthesis shape data reading process S31 (may be referred to as “process S31”) is a process of reading the dental prosthesis shape data created in step S20 into the processing operation device 30 such as a CAM device. . In this embodiment, the shape data is read from the receiving means 35 into the processing operation device 30 via the reception from the communication means 37d shown in FIG. 3 or the external storage device 37c.

  The arrangement and determination process S32 (may be referred to as “process S32”) in the processing material data is stored in advance in the database 34b of the storage unit 34 of the processing arithmetic device 30 and displayed on the processing material data displayed. This is a process of displaying and arranging the acquired shape data of the dental prosthesis and determining the material to be used. At this time, the shape data of the dental prosthesis is laid out in the processing material by movement or rotation, but is performed as follows.

  The processing material is a block shape having a shape such as a rectangular parallelepiped, a cube, and a cylinder made of a material forming the dental prosthesis. There is a configuration in which the holding protrusion 2 (see FIG. 1) is arranged on such a rectangular parallelepiped, a cube, and a cylinder. Therefore, the processed material data also follows this shape. Here, as one example, it is assumed that processing materials that are rectangular parallelepipeds of three different sizes are prepared, and processing material data corresponding to these three processing materials is stored in the database 34b. .

  FIG. 6 shows a scene in which the dental prosthesis data 51 having the holding projection data 52, the first processed material data 60, the second processed material data 61, and the third processed material data 62 appear on the display device 38b. It is a figure. Fig.6 (a) is the figure seen from the occlusal surface side. FIG. 6B is a side view. In FIG. 6A and FIG. 6B, the dental prosthesis data 51 and the holding projection data 52 are indicated by dotted lines.

As described above, in the process S32, at least two pieces of processing material data having different shapes and sizes are simultaneously displayed so as to be overlapped, and one dental prosthesis data and holding projection data as necessary are also displayed. Overlaid. Accordingly, it is possible to simultaneously confirm the fit of dental prosthesis data into a plurality of processing material data, and it is possible to select processing material data to be used efficiently. In that case, it is preferable that the operator can change the arrangement posture by moving or rotating the dental prosthesis data. Further, at this time, it may be configured to calculate whether or not the dental prosthesis data and the holding projection data are included in the processing material data, and display the result on the display device 38b.
In this example, three processed material data of the first processed material data 60, the second processed material data 61, and the third processed material data 62 are displayed in an overlapped manner, and here the dental prosthesis data 51 and the holding projection data 52 are displayed. Are displayed together. The first processed material data 60 and the second processed material data 61 do not fit the dental prosthesis data 51 and the holding projection data 52, but the third processed material data 62 holds the dental prosthetic data 51 and the held data. A state in which the projection data 52 is expressed is expressed.

  The manner in which a plurality of processed material data is displayed in an overlapping manner is not particularly limited, but may be arranged so that the center lines thereof are aligned, or in any of a plan view, a front view, and a side view. It may be arranged so that at least one of the sides is aligned.

  The display mode of the dental prosthesis data and the processed material data is not particularly limited, and a known three-dimensional graphic technique such as a method of displaying only an edge such as a wire display or a method of semi-transparent display can be used.

  The positional relationship among the first processed material data 60, the second processed material data 61, the third processed material data 62, the dental prosthesis data 51, and the holding projection data 52 displayed at the same time is recognized by calculation based on the program, It is also possible to determine whether the prosthesis data 51 and the holding projection data 52 are included in each processing material data or not. When there are a plurality of processing material data in which the dental prosthesis data 51 and the holding projection data 52 are stored, processing material data having a higher priority is selected according to a predetermined priority order. The priority can be, for example, in order of increasing volume.

  The processed material data selected in this way can be displayed in a different color so that it can be visually distinguished from other processed material data. For example, it is possible to change the color of only the selected processing material data so as to make it stand out, or to set the processing element data other than the selected processing material data to a conspicuous color or non-display.

  Moreover, the name of the processing material data of each size is determined in advance, and the name of the processing material data determined as described above can be displayed on the table device 38b. As described above, the selected processing material data may be configured to be notified to the operator not only by graphic display but also by an expression method using characters.

  Returning to FIG. NC data calculation process S33 (may be referred to as “process S33”) includes the conditions set so far, the tool information stored in the database 34b provided in the storage means 34 of the machining arithmetic unit 30, This is a process of calculating the machining operation of the machining apparatus 40 as NC data based on data such as machining information.

  The NC data output process S34 (may be referred to as “process S34”) is a process of outputting the NC data calculated in process S33. When the machining operation device 30 and the machining device 40 have different configurations, the machining operation calculated by the machining operation device 30 is transmitted to the machining device 40 via NC data. As a transmission method, there is a method of transmitting NC data to the machining apparatus 40 using communication, a storage medium, or the like. On the other hand, when the machining operation device 30 and the machining device 40 are integrated, communication between memories between the machining operation device 30 and the machining device 40 may be sufficient.

  Returning to FIG. 4, the processing step S40 will be described. In the processing step S40, processing is performed according to the NC data created in step S30 using the processing material based on the selected processing material data.

  According to the processing arithmetic device 30, the CAD / CAM system 50 including the processing arithmetic device described above, and the program for the processing arithmetic device, the layout of the processing material data and the dental prosthesis data is individually repeated one by one as in the past. Therefore, it is possible to select a processing material to be used efficiently, and it is possible to reduce time and labor.

DESCRIPTION OF SYMBOLS 1 Dental prosthesis 10 Three-dimensional data reader 20 Design apparatus 30 Processing arithmetic device 31 Arithmetic device 37 Input device 38 Output device

Claims (5)

A program for determining a processing material to be used based on shape data of a dental prosthesis,
A procedure for superimposing and displaying a plurality of processed material data obtained by converting the shape of a plurality of processed materials having different sizes and / or shapes;
A procedure for superimposing and displaying dental prosthesis data obtained by converting the shape of the dental prosthesis into data on the processed material data displayed in a superimposed manner,
A procedure for determining whether all of the dental prosthesis data is included inside the processed material data;
including,
Machining calculation program.   The machining calculation program according to claim 1, wherein a priority order is determined in advance for application to the plurality of machining material data.   3. The method according to claim 1, further comprising a step of notifying the processing material data in which all of the dental prosthesis data is included inside the processing material data among the processing material data displayed in a superimposed manner. Machining calculation program. Receiving means for receiving shape data of the dental prosthesis;
Storage means for storing the machining operation program according to any one of claims 1 to 3,
Calculation means for calculating the machining calculation program based on the shape data received by the reception means;
An output device for outputting a calculation result by the calculation means. A three-dimensional data reader for generating three-dimensional shape data;
A design device for creating shape data of a dental prosthesis based on the three-dimensional shape data;
The processing calculation device according to claim 4, wherein the processing device of the dental prosthesis is received by receiving shape data of the dental prosthesis created by the design device and calculates a processing procedure of the dental prosthesis,
A CAD / CAM system comprising: a processing device that performs processing according to a processing procedure by the processing arithmetic device.

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