JP2019058492A - Processing calculation device and dental prosthesis production system - Google Patents

Abstract

To provide a processing calculation device for making it possible to efficiently arrange processing raw materials in processing a plurality of dental prosthesises in a single batch.SOLUTION: A processing calculation device comprises: calculation means for calculating operation of a processing device on the basis of shape data on a plurality of dental prosthesises having different shapes; and output means for outputting a calculation result by the calculation means to a display device. The calculation means determines the propriety of allocation of a plurality of pieces of processing raw material data representing processing raw materials for processing the dental prosthesises on the basis of relation between magnitudes of adjacent pieces of processing raw material data; and, it is determined that the allocation is rejected, reports the rejection.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a processing arithmetic device such as a CAM device and a dental prosthesis manufacturing system including the same, and more particularly to a processing arithmetic device capable of efficiently manufacturing a dental prosthesis and a dental prosthesis manufacturing system.

  In recent years, dental prostheses are manufactured by calculation based on data from design to determination of manufacturing process by dental prosthesis manufacturing system such as CAD / CAM system, and processed automatically by NC machine tool that received the data. It is getting more and more done. In this case, a plurality of dental prostheses are produced in the same batch from the viewpoint of efficient processing. Therefore, for example, as shown in FIG. 13, a plurality of processed materials 50 are arranged in a row and a column in a jig 51 in one batch, and each processed material 50 is processed to obtain a dental prosthesis (E.g., Patent Document 1).

JP, 2014-168707, A

  The processed material is usually prepared in several sizes according to the size of the dental prosthesis to be produced. As a result, when a plurality of processed materials are arranged in rows and columns in a two-dimensional manner as described above, the space between the processed materials becomes smaller at places where the large processed materials are adjacent, etc. The interval changes depending on the size relationship of.

  As described above, the arrangement of the plurality of processing materials on the processing device table is used in the processing tools used so that the processing tool (bar) does not damage the processing material next to it when processing the processing material to be noticed. It is necessary to consider the maximum size of the diameter and the size of the material to be used.

  However, conventionally, it has not been considered to efficiently arrange processing materials having different sizes in a jig.

In addition, when it becomes necessary to use a larger processing tool or material than the one originally intended for the size of the processing tool and material to be processed, with the jig prepared, It will be necessary to reduce the manufacturing efficiency considerably. Specifically, for example, the following can be considered.
When processing the surface opposite to the processing material arranged next to the processing material, if the distance between the processing material to be processed and the processing material next to it becomes narrow, the processing material arranged next to the other during processing At the same time, the processing tools come in contact with and scrape and damage them. On the other hand, in the case where adjacent processing materials are small and there is a large gap between them, waste occurs from the viewpoint of space and the viewpoint that the tool moves without processing.
And in processing of a dental prosthesis, it is usually performed in the state where processing materials of different sizes are mixed in one batch.

  Therefore, in view of the above problems, the present invention has an object to provide a processing arithmetic device capable of efficiently arranging processing materials when processing a plurality of dental prostheses in one batch. In addition, a dental prosthesis manufacturing system including the processing arithmetic device is provided.

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

  One aspect of the present invention is computing means (12) for computing the operation of the processing device (8) based on shape data of a plurality of dental prostheses (1) having different shapes, and a computing result by the computing means A processing arithmetic device (10) comprising an output means (16) for outputting to a display device (18b), wherein the calculating means allocates a plurality of processing material data representing a processing material for processing a dental prosthesis Whether or not it is judged based on the relationship between the sizes of adjacent processing material data (S32c) is a processing arithmetic device (10) that notifies when the allocation is judged to be impossible in the judgment.

  In the machining arithmetic device, the arithmetic means may be configured to notify when the allocation is determined to be impossible in the determination, and to inhibit the progression of the arithmetic operation of the machining device.

  In addition, a three-dimensional data reader (6) that generates three-dimensional shape data, a design device (7) that creates shape data of a dental prosthesis based on the three-dimensional shape data, and a dental prosthesis created by the design device Dental prosthodontic preparation system comprising: the above-mentioned processing arithmetic device (10) for receiving the shape data of and calculating the processing procedure of the dental prosthesis; and the processing device (8) for processing according to the processing procedure by the processing arithmetic device (5) can be provided.

  According to the present invention, a plurality of processing materials having different sizes can be efficiently arranged, and by manufacturing based on this, it is possible to manufacture a dental prosthesis efficiently.

Fig.1 (a) is the top view which showed typically the external appearance of the dental prosthesis 1 with the holding | maintenance protrusion 2 used as object of preparation, FIG.1 (b) is the front view. FIG. 2 is a block diagram showing the configuration of a dental prosthesis production system 5; FIG. 2 is a block diagram showing a configuration of a processing arithmetic device 10. It is a figure which shows the flow of preparation method S1 of a dental prosthesis. It is a figure which shows the flow of preparation process S30 of NC data. It is a figure explaining process S32 of allocation of processing material data. FIGS. 7A and 7B are diagrams for explaining selection of processed material data. FIG. 7 is a view schematically showing a processing material 31 disposed in a jig 30. It is the figure which represented the processing raw material data allocated typically. It is a figure which shows the scene where the magnitude | size of the process raw material used for each process raw material data was selected. It is a figure showing the result in which the decision | availability of processing was determined by processing material data which adjoins. It is a figure of the other example showing the result of which the decision | availability of processing was determined by processing material data which adjoins. FIG. 7 is a perspective view showing a scene in which a processing material 50 is disposed on a jig 51.

  Hereinafter, the present invention will be described based on the embodiments shown in the drawings. However, the present invention is not limited to these embodiments.

First, an example of the form of a dental prosthesis to be produced will be described. The external appearance of the dental prosthesis 1 with the holding | maintenance protrusion 2 attached to FIG. 1 was shown typically. FIG. 1A is a plan view, and FIG. 1B is a dental prosthesis 1 in a front view.
The dental prosthesis 1 is a type of dental prosthesis called a so-called 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 indicated by a broken line. The crown, which is in the form of a container, covers and protects the treatment site, for example by covering it on the treated tooth.
Since the dental prosthesis 1 is arranged to cover the occlusal surface of the tooth in this way, it is necessary to form the occlusal surface also in the dental prosthesis 1, where the dental prosthesis 1 corresponds to the clefts of the tooth. A cleft 1c of the prosthesis 1 is present.
Thus, the external shape of the dental prosthesis 1 is complicated, and the shape is largely different depending on the dental site and the person applying it.

  Here, at the time of processing, it has a holding projection 2 which is a portion held by the processing device 8 (see FIG. 2) from a part of the outer surface 1a and held by the processing device 8. In addition, this holding | maintenance process 2 is finally excluded and only the dental prosthesis 1 becomes.

  Next, a CAD / CAM system 5 as a dental prosthesis production system including the processing arithmetic device 10 according to one embodiment will be described. FIG. 2 is a diagram for explaining one form, and is a block diagram conceptually showing the configuration of a CAD / CAM system 5 (hereinafter sometimes referred to as “system 5”). The system 5 includes a three-dimensional data reader 6, a design device (CAD device) 7, a processing arithmetic device (CAM device) 10, and a processing device 8.

  The three-dimensional data reading device 6 generates three-dimensional shape data of a tooth to which the dental prosthesis 1 is to be applied or an abutment tooth model imitating the tooth. Thus, the shape is converted into three-dimensional data. The three-dimensional data reader 6 may be a known one, for example, a contact type scanner which measures by bringing a probe into contact and a non-contact type scanner which measures using a laser or light.

  The design device 7 is means for taking in three-dimensional shape data obtained by the three-dimensional data reader 6 and designing shape data of a dental prosthesis corresponding to the three-dimensional shape data. For example, based on the acquired three-dimensional shape data, prototype data of candidate dental prostheses may be selected from the database, and the selected prototype data may be changed to conform to the three-dimensional shape data. A CAD apparatus can be mentioned as such a design apparatus 7, A well-known thing can be used.

The processing arithmetic device 10 includes shape data of a plurality of dental prostheses designed by the design device 7, data of jigs and tools provided in the processing device 8, data of types and forms of tools, and data of materials (processing materials) to be actually processed. From the above, the size of each processing material, the arrangement of a plurality of processing materials, the jig used, the tool, the processing process, etc. are calculated. Then, the processing arithmetic device 10 functions as a unit that generates NC data instructing the processing device 8 to perform an operation for producing a dental prosthesis based on the calculation result, and transmits the NC data to the processing device 8.
In particular, in the present embodiment, the processing arithmetic device 10 performs an operation for arranging a plurality of processing materials having different sizes. Then, based on the calculation result, the processing material is disposed in the processing device 8, and processing of the dental prosthesis is performed efficiently. The specific calculation by such a processing arithmetic unit 10 will be described later. As the processing arithmetic device 10, for example, a CAM device can be mentioned.

  FIG. 3 is a block diagram conceptually showing the configuration included in processing operation device 10. As shown in FIG. The processing arithmetic device 10 has an arithmetic device 11, an input device 17 and an output device 18. The arithmetic unit 11 includes an arithmetic unit 12, a RAM 13, a storage unit 14, a receiving unit 15, and an output unit 16. Further, the input device 17 includes a keyboard 17a, a mouse 17b, an external storage device 17c functioning as one of storage media, and a communication device 17d.

  The computing means 12 is constituted by a so-called CPU (central operator), and is a means connected to each of the above-mentioned constituent members and capable of controlling them. It also functions as a means for executing the program 14a while selecting from various databases 14b stored in the storage means 14 or the like functioning as a storage medium, and performing calculations and various data described later based on this. . Although the content of the calculation will be described later, the calculation of the allocation of the processing material to the jig, the calculation of the procedure of the processing, the selection of the tool, the calculation of the processing conditions, and the like can be mentioned. Examples of data generated by this calculation include NC data that is an instruction to the processing device 8.

  The RAM 13 is a component that functions as a work area of the computing means 12 and a temporary data storage means. The RAM 13 can be configured by an SRAM, a DRAM, a flash memory or the like, and is similar to a known RAM.

The storage unit 14 is a component that functions as a storage medium in which the various programs 14a and the database 14b serving as the basis for obtaining the above-described calculation and data to be generated are stored. Here, a program that calculates allocation of a plurality of processed material data can be mentioned as one of the programs. Further, as one of data groups stored in the database 14b, data of shapes and materials (physical property values and the like) of a plurality of processed material data having different shapes and sizes can be mentioned.
The storage unit 14 may be able to store various intermediate and final results such as NC data obtained by execution of the program.

  The receiving unit 15 is a component having a function to appropriately take in information from the outside into the arithmetic device 12, and the input unit 17 is connected. So-called input ports, input connectors and the like are also included in this.

  The output unit 16 is a component having a function of appropriately outputting the information to be output out of the obtained result to the outside, and an output device such as the communication device 18 a or the display device 18 b is connected thereto. So-called output ports, output connectors and the like are also included in this.

The input device 17 includes, for example, a keyboard 17a, a mouse 17b, an external storage device 17c, and a communication device 17d. The keyboard 17a and the mouse 17b may be known ones, and the description is omitted.
The external storage device 17c is a publicly known storage device that can be externally connected, and also functions as a storage medium. Here, various programs and data required can be stored without being particularly limited. For example, a program similar to the storage unit 14 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 17c. These include, for example, CD-ROM and CD-ROM drive, DVD and DVD drive, hard disk, various memories and the like.
The communication device 17 d is means for transmitting data from another device directly to the receiving means 15. For example, transmission of shape data of the dental prosthesis from the design device 7 directly to the receiving means 15 can be mentioned.

The output device 18 includes, for example, a communication device 18a and a display device 18b.
The communication device 18a is a means for transmitting the obtained data to another device. For example, it can be mentioned that the arrangement data of the processing material to the jig and the processing procedure data are transmitted to the processing device 8.
The display device 18 b is a device on which the calculation result of each scene, the selection of various functions, and the like are displayed. The operator can operate the input device 17 to cause the arithmetic device 11 to function while referring to the display device 18 b. A publicly known display device can be applied as such a display device 18b, and a monitor etc. can be mentioned as this.

  For example, a computer can be mentioned as such a processing arithmetic device 10. The computer main body generally includes various devices corresponding to the arithmetic device 11, and is configured to be able to connect the input device 17 and the output device 18 thereto.

  Returning to FIG. 2, the processing device 8 will be described. The processing device 8 receives NC data, which is data of an operation instruction of the processing device generated by the processing arithmetic device 10, and performs processing on the processing material arranged in accordance with the NC data, thereby processing the dental prosthesis from the processing material It is what makes things. Such processing apparatus may include known NC machine tools.

  According to the processing arithmetic device 10 as described above and the system 5 including the same, it is possible to arrange a plurality of processing materials so as to improve processing efficiency as described later, and efficiently manufacture a dental prosthesis.

  In the present embodiment, as shown in FIG. 2, the three-dimensional data reader 6, the design device 7, the processing arithmetic device 10, and the processing device 8 constituting the dental CAD / CAM system 5 are independent of one another. However, this is not necessarily the case, and some of the functions of the plurality of components constituting the dental CAD / CAM system may be integrated. Alternatively, predetermined functions may be separated and added as another device.

  Next, a method for producing a dental prosthesis (method S1 for producing a dental prosthesis) will be described using the CAD / CAM system 5 as a dental prosthesis producing system. Although an example using the CAD / CAM system 5 is described here for the sake of easy understanding, it is not limited thereto. And the operation etc. which should be performed by each device are further understood by this explanation.

  The flow of the method S1 for producing a dental prosthesis (hereinafter sometimes referred to as "the production method S1") is shown in FIG. The manufacturing method S1 includes a three-dimensional shape data generation process S10, a dental prosthesis shape data generation process S20, an NC data generation process S30, and a processing process S40. Each process is explained below.

  Three-dimensional shape data creation process S10 (sometimes referred to as "process S10") is a process of creating three-dimensional shape data of an abutment tooth model or the like using the three-dimensional data reader 6 or the like. A known method can be used to create such three-dimensional shape data.

The shape data creation process S20 of the dental prosthesis (sometimes referred to as "process S20") acquires the three-dimensional shape data obtained in the process S10, and based on this, the dental prosthesis is prepared using the design device 7. It is a process of creating shape data of an object.
The creation of shape data of such a dental prosthesis can be performed by a conventional method using a known design device such as CAD.

The process S30 for creating NC data (sometimes referred to as "process S30") determines a plurality of dental prostheses to be produced in one batch based on shape data of a plurality of dental prostheses created in the process S20. Then, the processing material data is allocated, the processing procedure is calculated, and the processing device 8 creates NC data instructing the processing operation for producing the dental prosthesis 1.
That is, based on the three-dimensional shape data of the obtained dental prosthesis, the calculation specified by the program 14a stored in the storage means 14 etc., and the shape and material data of the processed material stored in the database 14b, etc. The computing means 12 creates NC data. Specifically, for example, the calculation is performed by the calculation means 12 or the like as follows. FIG. 5 shows the flow of step S30.

  The process S30 includes a process S31 for reading shape data of a dental prosthesis, a process S32 for allocating processed material data, a process S33 for calculating NC data, and a process S34 for outputting NC data.

  Shape data reading process S31 of the dental prosthesis (sometimes referred to as "process S31") is a process of reading the shape data of the dental prosthesis created in step S20 into the processing arithmetic device 10. In the present embodiment, shape data is read from the receiving means 15 into the processing arithmetic device 10 via the reception from the communication means 17d shown in FIG. 3 or the external storage device 17c.

  In the process of allocating processing material S32 (sometimes described as "process S32"), in order to determine the arrangement of a plurality of processing materials arranged in a jig, a process of allocating a plurality of processing material data by the processing arithmetic device 10 It is. Specifically, for example, the following is performed. An example of the flow of step S32 is shown in FIG. As can be seen from FIG. 6, in this example, the process S32 includes processes S32a to S32f.

  In step S32a, a plurality of dental prosthesis data to be produced in one batch are arranged in a matrix, and this is set as an initial state. In dental prosthesis data corresponding to a plurality of dental prostheses to be prepared in one batch, it is usual that the front teeth of upper and lower jaws, back teeth of upper and lower jaws, etc. having different shapes and sizes are mixed.

  In step S32b, machining material data, which is data of a machining material to be used, is selected for each of the dental prosthesis data arranged in step S32a. And thereby, several processing raw material data are allocated as an initial value. Specifically, it is as follows. 7 to 10 show diagrams for explanation.

  7 (a) and 7 (b) show a scene in which the holding projection data 22, the dental prosthesis data 21, and four processed material data 25 to 28 of different sizes are displayed on the display 18b. There is. FIG. 7 (a) is a view from the occlusal surface side, and FIG. 7 (b) is a view from the side. In FIGS. 7A and 7B, the dental prosthesis data 21 and the holding projection data 22 are indicated by dotted lines.

  The processed material data 25 to 28 are data assuming block-shaped processed materials having shapes such as a rectangular parallelepiped, a cube, and a cylinder made of a material forming the dental prosthesis. The processing material may be of such a rectangular parallelepiped, cube, or cylindrical form in which the holding projection 2 (see FIG. 1) is disposed. Therefore, in this case, the processed material data 25 to 28 also conform to this shape. Here, as one example, it is assumed that processing materials which are rectangular parallelepipeds with four different sizes are prepared in the processing device 8, and processing material data corresponding to these four processing materials are also stored in the database 14b in the processing arithmetic device 10. It is assumed that 25-28 are stored.

In step S32b, the dental prosthesis data 21 obtained in step S32a and the holding projection data 22 are displayed and arranged on the processed material data 25 to 28 having different displayed sizes as described above, and the processing to be used Determine the material. At this time, the shape data of the dental prosthesis is laid out in the processing material data by movement, rotation or the like.
Specifically, for example, as shown in FIGS. 7A and 7B, the processed material data 25 to 28 are simultaneously displayed so that one dental prosthesis data 21 and holding projection data 22 are displayed here. Are stacked. As a result, the convergence of the dental prosthesis data and the holding projection data to a plurality of processed material data can be confirmed simultaneously, and it is possible to select the processed material data to be used efficiently. At that time, it is preferable that the operator is configured to be able to change the posture by moving or rotating the dental prosthesis data and the holding projection data. At this time, whether or not the dental prosthesis data and the holding projection data are contained in the processed material data may be calculated by a program, and the result may be displayed on the display device 18b.
In the example of FIG. 7A and FIG. 7B, four processed material data 25 to 28 are displayed in an overlapping manner, and here, the dental prosthesis data 21 and the holding projection data 22 are displayed together. Then, although the dental prosthesis data 21 and the holding projection data 22 do not fit for the processing material data 25 and the processing material data 26, the dental prosthesis data 21 and the holding projection data for the processing material data 27 and the processing material data 28. It is expressed that 22 fits. However, it is clear that waste is generated in the large processed material data 28.

  There is no particular limitation on the manner in which a plurality of processed material data are displayed in an overlapping manner, but the arrangement may be such that the center lines are aligned, or in any of plan view, front view and side view It may be arranged such that at least one of the sides is aligned.

  The display mode of the dental prosthesis data, the holding projection data and the processed material data is not particularly limited, and known three-dimensional graphic techniques such as a method of displaying only an edge such as a wire display or a method of semitransparent display Can.

  The positional relationship between the processing material data 25 to 28, the dental prosthesis data 21 and the holding projection data 22 simultaneously displayed is recognized by calculation based on a program, and the dental prosthesis data 21 and the holding projection data 22 are each processing material data It is also possible to judge those that fall within the range of 25-28. Then, when there are a plurality of processed material data in which the dental prosthesis data 21 and the holding projection data 22 fit, processed material data having a high priority is selected in accordance with a predetermined priority. The priority can be, for example, in ascending order of volume.

  The processed material data selected in this manner can be displayed in different colors so that it can be visually distinguished from other processed material data. For example, it is possible to change only the selected processing material data into a color to make it stand out, or to make processing material data other than the selected processing material data inconspicuous or non-displayable.

  Further, names (for example, A to D shown later) are determined in advance for the processing material data of each size, and the names of the processing material data determined as described above are displayed on the display device 18b. You can also. 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 a character expression method.

As a result, allocation of the processing material data to the jig as an initial value is performed. The figures for explanation are shown in FIGS. FIG. 8 schematically shows the processing material 31 disposed in the jig 30. As shown in FIG. In the present example, for convenience, the processing material 31 arranged two-dimensionally in 4 rows × 4 columns will be described.
The processing material 31 thus arranged in the processing apparatus 8 is as processing material data 32 assigned to four rows (X1 to X4) × 4 columns (Y1 to Y4) as shown in FIG. It is treated. Then, since the size selected as described above is already assigned to each processed material data 32, as shown in FIG. 10, A, which is a name indicating the size for each processed material data 32, B, C, D are attached. In this example, A is the largest processed material data 32, and represents smaller processed material data 32 in the order of B, C, and D. Accordingly, A is the processed material data 28 of FIG. 7A, FIG. 7B, B is FIG. 7A, the processed material data 27 of FIG. 7B, C is FIG. 7A, FIG. The processed material data 26 and (b) represent the processed material data 25 of FIGS. 7 (a) and 7 (b), respectively.

Then, in the allocation as the initial value shown in FIG. 10, the data is stored on the memory of the processing arithmetic device 10 so as to make it possible to determine whether or not the processing material data can be allocated (step S32c) as described later. The specific expression of the assignment is not particularly limited, but may be, for example, array data or an address of an address stored on the memory. Such expression naturally corresponds to the position of the processing material 31 arranged in a two-dimensional manner in the jig 30 as shown in FIG. 8, but here the relationship between adjacent processing material data 32 is It should be expressed. Therefore, the processing operation device 10 does not have to be stored in a two-dimensional manner in the memory as long as it can refer to the size names (A to D) of the processing material data expressed as shown in FIG. .
In addition, each allocated processing material data may be linked to a storage area of flag data in the processing arithmetic device 10. As a result, the result of the assignment determination (step S32c) performed in the subsequent process can be efficiently recorded.

Referring back to FIG. 6, the process S32c will be described. In step S32c, it is determined whether the assignment of the processing material data as the initial value assigned in step S32b is appropriate.
This determination is made based on a predetermined rule. Such a rule is stored, for example, in the storage means 14 of the processing arithmetic device 10, and is carried out by making a decision by sequentially referring to the program.

The specific determination rule is not particularly limited, but can be defined, for example, as follows. Here, A to D indicate the names of the processed material data described above, and N indicates that the processed material data is not allocated.
(1) Next to A is D or N
(2) Next to B is C, D or N
(3) Next to C is B, C, D or N
(4) Next to D is A, B, C, D or N

  The specific contents of such rules are determined in advance according to the types of actual A, B, C, D, the pitch at which the processing material is placed on the jig used, the size of the processing tool used, etc. It is a thing.

Then, in this embodiment, when the arrangement of the processing material data as the initial value shown in FIG. 10 is determined in light of the rules (1) to (4), it is as shown in FIG. In FIG. 11, those satisfying the rules (1) to (4) are represented by solid lines, and those not satisfying the rules (1) to (4) are represented by broken lines. Thus, in step S32c, it is determined whether or not processing can be performed in accordance with the given rule.
Here, first, Y1 to Y4 are sequentially determined in the column direction from the processed material data of (X1, Y1) for the X1 row, and then Y1 to Y4 are determined in the column direction for the X2 row. At this time, processed material data of line X1 is also considered. Next, with regard to the X3 row, determination is made from Y1 to Y4 in the column direction while taking into consideration the processed material data of the X2 row, and finally, for the X4 row, Y1 to Y4 in the column direction while considering the processed material data of the X3 row judge. However, the method of determination is not limited to this, and can be set appropriately.

Such a determination result is displayed on the display device 18b of the processing arithmetic device 10 so as to distinguish between those that can be processed (solid line) and those that can not be processed (dotted line), and the inside of the arithmetic device 11 is displayed. It is recorded in flag data linked on the memory.
For example, "-1" is recorded in the flag data for the processing material data which can not be processed indicated by a dotted line, and "1" is recorded for processing material data which can be processed indicated by a solid line. Also, “0” is recorded in a portion (indicated by “N”) to which processing material data is not allocated. According to this, it means that there is a processed material that would be improperly processed if even one "-1" exists, and it is necessary to make sure that there is no "-1". In addition, it can be said that efficient processing of a dental prosthesis can be achieved by making it as large as possible when all of these numbers are countable, with no "-1" being present. That is, in the example of FIG. 11, eight “−1” s exist, and therefore, appropriate processing can not be performed as it is.

Here, the determination is made by applying the rule between all the processing material data adjacent in the row direction and the column direction. However, depending on the shape of the jig, for example, a jig exists or is adjacent between adjacent rows (for example, between Y1 and Y2, Y2 and Y3, and Y3 and Y4). It may not be necessary to apply the above rules in adjacent rows, such as when there is a sufficient gap between the rows. In this case, as one condition of the rule, an item to the effect that "determination is unnecessary in adjacent columns" may be added. According to this, for example, it becomes as shown in FIG.
In addition, depending on the form of the jig, such as the interval between Y1 and Y2 only, the interval between Y1 and Y2 and Y3 and Y4 between the cases where the determination is unnecessary, and so on according to the form of the jig. It should be set. Similarly, the items of the rule can be set based not only on the column but also on the row.

  After such assignment determination is made in step S32c, it is determined in the next step S32d whether or not processing is possible using the assigned processing material data. That is, as a result of the determination in step S32c, no processed material data as shown by the broken lines in FIGS. 11 and 12 exists in all processed material data, or no processed material data for which the flag is "-1". If it is determined that all processed materials can be processed, "Yes" is selected in step S32d, and the allocated process S32 of processed material data is ended.

  On the other hand, at step S32d, there is at least one processed material data, such as processed material data as shown by broken lines in FIGS. 11 and 12, or processed material data with a flag of "-1". When it is determined that there is a processed material that can not be or causes a problem, the process proceeds to step S32e.

In step S32e, it is informed that processing can not be performed with the current allocation of processed material data, and it is prohibited to proceed to step S33 without changing the allocation.
The method of notification is not particularly limited, and it is indicated that the notification is displayed on the screen, and only selection to change the allocation can be made. For example, the switch of the NC data creation progress can not be displayed on the screen of the display device 18 b or can not be operated even when displayed.
In addition to this, a notification with an effect that the operator can easily notice, such as a sound or blinking on the screen, may be included.
Thus, the process automatically proceeds to step S32f.

In step S32f, the positions of the processed material data are exchanged, the processed material data is removed (the removed portion is displayed, for example, as "N"), or the processed dental material is changed by changing the dental prosthesis to be processed. Change the allocation of processed material data by changing it.
This may be performed manually, may be performed automatically by a computer, or may be performed in combination.

  As described above, after the allocation change of the processing material data is performed in the process S32f, the process returns to the process S32c and the subsequent processes are repeated. And it is repeated until it becomes Yes by process S32 d, and allotment process S32 of processing material data is completed.

  Returning to FIG. 5, the description will be continued. The conditions set up so far in the NC data calculation process S33 (sometimes referred to as "process S33") and the processing arithmetic device based on the allocation of the processing material data determined in the allocation process S32 of the processing material data The machining operation of the machining device 8 is calculated as NC data based on data such as tool information and machining information stored in the database 14b provided in the storage means 14 of 10.

  The NC data output process S34 (which may be described as "process S34") is a process of outputting the NC data calculated by the process S33. When the processing arithmetic device 10 and the processing device 8 have different configurations, the processing operation data calculated by the processing arithmetic device 10 is transmitted to the processing device 8 through the NC data. As a transmission method, there is a method of transmitting NC data to the processing device 8 using communication, a storage medium, or the like. On the other hand, when the processing arithmetic device 10 and the processing device 8 are integrally configured, communication between memories between the processing arithmetic device 10 and the processing device 8 may be sufficient.

  Returning to FIG. 4, the processing process S <b> 40 will be described. In the processing step S40, processing is performed according to the NC data created in step S30, using the processing material according to the selected processing material data. The placement of the processing material on the jig and the placement of the jig on the processing apparatus may be performed automatically or manually.

  According to the processing arithmetic device 10 described above, the CAD / CAM system 5 including the same, and the program for the processing arithmetic device, a plurality of processing materials having different sizes can be efficiently processed.

1 Dental prosthesis 5 CAD / CAM system (Dental prosthesis manufacturing system)
6 Three-dimensional data reader 7 Design device 8 Processing device 10 Processing arithmetic device

Claims (3)

A processing arithmetic device comprising arithmetic means for calculating the operation of a processing device based on shape data of a plurality of dental prostheses having different shapes, and output means for outputting the calculation result by the arithmetic means to a display device. ,
In the computing means,
Whether or not allocation of a plurality of processed material data representing a processed material for processing the dental prosthesis is determined is determined based on the relationship between the sizes of the adjacent processed material data,
When the allocation is judged to be impossible in the determination, a notification to that effect is given,
Processing arithmetic unit. The computing means is
The processing arithmetic device according to claim 1, wherein the notification is performed when the assignment is determined to be impossible in the determination, and the progress of the calculation of the operation of the processing device is prohibited. 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 arithmetic device according to claim 1 or 2, wherein shape data of the dental prosthesis created by the design device is received to calculate a processing procedure of the dental prosthesis;
And a processing device for processing in accordance with a processing procedure by the processing arithmetic device.

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