JPH11110425A - Three-dimensional model preparing device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a three-dimensional model by rearranging shape information including a shape, to which a following wall thinning processing can not be executed in product design using a three-dimensional model preparing device. SOLUTION: The three-dimensional model preparing device 20 is provided with a shape information storing device 22, shape judging device 24 for judging the inhibition of the preparation of a thin shape, identification information editing device 26 for allowing the shape information storing device 22 to store a sequence identification information group and preparation inhibition sequence identification information in this order, procedure information editing device 28 for making the sequence identification information and procedure information correspond to each other, and preparation inhibition removing means 30 for removing the sequence identification information on a shape, to which a following wall thinning processing can not be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional model creation device and a three-dimensional model creation method, and more particularly to a three-dimensional three-dimensional CAD system for interactively creating a thin-walled three-dimensional model based on three-dimensional three-dimensional shape information. About.

[0002]

2. Description of the Related Art FIG.
It is a block diagram of a conventional model creation device shown in Japanese Patent Publication No. 80. In the figure, a model creation device includes a three-dimensional figure storage unit 1, a three-dimensional scan control unit 2, a plan view scan control unit 3,
A front view scan control unit 4, a right side view scan control unit 5, a plan view storage unit 6, a front view storage unit 7, a right side view storage unit 8, and
A three-dimensional scanning control unit 2 having a graphic storage device 9;
Determines the three-dimensional scanner corresponding to each projection by comparing the three-dimensional scanning position data, sends the determined three-dimensional scanner to the three-dimensional graphic storage unit 1, and stores the three-dimensional coordinates. And three-dimensional scanning control 3
Evaluates the scanner-possible operation data, determines the possible movement of the scanner in three dimensions, defines the length of the scanning axis constituting the scanner as the thickness of the sheet metal part, By storing the coordinates after the movement including the movement miracle of the scanning end in the figure storage unit 1, the surface model of the sheet metal part is determined from the projection drawing information of the three-dimensional shape.

Further, in a conventional product design using a three-dimensional CAD system, a thin-walled shape in which a predetermined thickness is added to an external shape of a product is created, and an internal mechanism is designed. The external appearance was subjected to a thinning treatment. In the case where the thickness to be sequentially processed in accordance with the order identification information in this thinning processing includes a thinning processing step in which the thickness is partially less than or equal to a predetermined plate thickness value, the external shape shown in FIG. And the thinning process was interrupted. FIG. 16 is a perspective view of a three-dimensional model being created. In the process of creating the inner wall shape,
This is a three-dimensional model when the thinning process is interrupted in order to maintain the mechanical strength of the model determined to be equal to or less than the limit thickness.

FIG. 17 is a process diagram of a conventional thinning process. The operator performs the illustrated model creation process (1)-
The model outer wall processing up to (5) is designated, and the three-dimensional CAD system is operated so as to perform the inner wall processing through this outer wall processing step. In the step (1), after reading the element identification information 1 of the first order identification information, the element identification information 1
To read the procedure information for creating a cube corresponding to
Create a model for In the step (2), the element identification information 2 of the second order identification information is read, and then the procedure information for creating the variable R corresponding to the element identification information 2 is read. Create a round shape that gradually narrows to zero. In steps (3) to (5),
Element identification information 2 corresponding to the third and subsequent order identification information
Is read out, and the procedure information for creating the variance R corresponding to the element identification information 2 at the corners 12, 13, and 14 of the cube 10 is read out at each step, and the outer wall processing of the cube is completed. When the step (6) of the inner wall processing similar to the cube is performed after the outer wall processing, the thickness of the corners of the inner wall to be thinned and the corners 11 to 14 subjected to the variable R processing are reduced in the thinning prohibition condition. Therefore, the three-dimensional CAD system automatically interrupted the thinning processing.

[0005]

In the above-described conventional model creating apparatus, it is necessary to process enormous three-dimensional shape projection view information. However, there is a disadvantage that the model creating device is required. In addition, there is also a drawback that it is cumbersome and requires a long time to manually create a thin-walled shape having a reduced thickness inside the model while designing the external shape. Further, if a shape that cannot be thinned is processed in advance, a thin shape having a predetermined thickness or more cannot be created, and there is a problem that the thinning process is interrupted in an unfinished state model, resulting in a significant decrease in work efficiency. . In addition, there was a problem that the division of labor between the external design of the design department and the internal design of the mechanical department could not be efficiently operated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A first object of the present invention is to inhibit the creation of a thin-walled shape even if the model has an external shape including a shape for which a thinning is prohibited. An object of the present invention is to obtain a three-dimensional model creation apparatus that selectively discards information and continuously executes a thinning process.

[0007] Further, after designing an external shape including a shape for which thinning is prohibited, a three-dimensional model forming method for continuously executing thinning processing is performed by editing the thinning shape creatable information and the prohibition information. It is.

Further, a three-dimensional model creation method is provided in which the creation of a thinned shape is prohibited, and then an inner wall model is created in advance and combined with the appearance shape.

[0009]

According to the present invention, there is provided a three-dimensional model creating apparatus including a creating unit for creating a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit for creating a shape. A first storage unit storing processing information for generating an entire shape of a three-dimensional model, and a detection unit configured to read a plurality of pieces of processing information and detect a shape in which a thinning process is prohibited. And a second storage unit that stores the processing information read from the first storage unit until a shape whose thinning processing is prohibited is detected based on the detection result of the detection unit. It is.

A first storage unit for storing processing information for creating an overall shape of the three-dimensional model; a detection unit for reading a plurality of pieces of processing information and detecting a shape for which thinning processing is prohibited; A creation unit that creates a three-dimensional shape in accordance with the processing information read from the first storage unit until a shape for which thinning processing is prohibited is detected based on a detection result of the detection unit. is there.

A first storage unit for storing processing information for creating an overall shape of the three-dimensional model; a detection unit for reading a plurality of pieces of processing information to detect a shape in which thinning processing is prohibited; Based on the detection result of the detection unit, the processing information for performing the thinning process and the processing information read from the first storage unit until the shape where the thinning process is prohibited are detected and stored separately. And a second storage unit.

A first storage unit for storing processing information for creating an overall shape of the three-dimensional model; a detection unit for reading a plurality of pieces of processing information to detect a shape for which thinning processing is prohibited; Based on the detection result of the detection unit, create a three-dimensional model according to the processing information for performing the thinning process,
And a creation unit that continues creating a three-dimensional model in accordance with the processing information read from the first storage unit until a shape in which the thinning process is prohibited is detected.

Further, the first storage unit and the second storage unit are shared.

Further, according to the three-dimensional model creating method of the present invention for creating a three-dimensional model in accordance with a plurality of pieces of machining information read from a storage unit for creating a shape, a plurality of pieces of machining information are read out and a thinning process is prohibited. Detecting the shape to be performed, and storing the processing information read out from the plurality of pieces of processing information until the shape whose thinning processing is prohibited is detected based on the detection result of the detection unit. It is provided with.

[0015] Further, a step of reading a plurality of pieces of processing information to detect a shape in which the thinning processing is prohibited, and a plurality of steps until the shape in which the thinning processing is prohibited is detected based on the detection result of the detection unit. And creating a three-dimensional model in accordance with the processing information read out of the processing information.

Also, a step of reading a plurality of pieces of processing information to detect a shape in which the thinning processing is prohibited, and processing information for performing the thinning processing and prohibiting the thinning processing based on the detection result of the detection unit. And storing separately the processing information read out of the plurality of pieces of processing information until the shape to be detected is detected.

Further, a step of reading a plurality of pieces of processing information to detect a shape for which the thinning processing is prohibited, and creating a three-dimensional model according to processing information for performing the thinning processing based on a detection result of the detection unit. And then continuing to create a three-dimensional model in accordance with the processing information read from the plurality of pieces of processing information until a shape for which the thinning processing is prohibited is detected.

Further, the order identification information and the procedure information for creating the appearance shape stored in the shape information storage device according to the present invention are used.
A three-dimensional model creation device that creates a thin-walled three-dimensional model based on three-dimensional shape information includes a shape determination device that sequentially reads sequence identification information to determine whether to create a thin-walled shape, and a determination by the shape determination device. Based on the result, an identification information editing device that stores the order identification information in the shape information storage device in the order of the order identification information group and the shape identification information that cannot be applied even if the thinning process is attempted later, and A procedure information editing device for associating the sequence identification information with the procedure information, and a creation prohibition removing device for removing from the shape information storage device the sequence identification information of a shape that cannot be applied even if a thinning process is attempted later. .

Further, the method of creating a thin-walled three-dimensional model based on the three-dimensional three-dimensional shape information of the order identification information and the procedure information stored in the shape information storage device according to the present invention includes the order identification. Information is sequentially read to determine the prohibition of the creation of a thin shape. Based on the determination result, the sequence identification information is continuously stored in the shape information storage device, and the shape that cannot be applied even if a thinning process is subsequently attempted. In order to create a thin-walled three-dimensional model by associating the sequence identification information with the procedure information.

Further, the three-dimensional three-dimensional shape information is read from the shape information storage device to determine whether the formation of the thin-walled shape is prohibited, and based on the determination result, the predetermined thickness is determined from the three-dimensional three-dimensional shape information of the thin-walled shape possible region. Is created and then combined with a three-dimensional solid shape.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Although the present invention is not particularly limited, the three-dimensional C
It is configured for an AD system. The three-dimensional CAD system accesses the shape information storage device and selects element identification information for specifying a three-dimensional shape based on ascending order identification information that defines the order of the thinning process. It is possible to read out procedure information that defines a procedure for creating a three-dimensional shape such as a wall, an outer wall, and a radius. By repeating this process by accessing the order identification information in ascending order, a three-dimensional model can be created. Prior to such a thinning process, a process of creating a thinned portion having a thickness equal to or less than a predetermined limit plate thickness is determined even in a part, and order identification information of a shape that cannot be applied even if a thinning process is attempted later is determined. By removing the three-dimensional model from the shape information storage device, it is possible to obtain a three-dimensional model creating device that continuously executes the thinning process without interrupting the three-dimensional model creating process. Therefore, a shape that cannot be thinned even if a thinning process is attempted later, that is, by forming a process of forming a complex front or back surface shape after a simple front or back surface thinning process, the thickness is reduced. Only the portion that can be made thin can be selectively processed to perform the thinning process on the final target model shape.

FIG. 1 is a block diagram of a three-dimensional model creating apparatus 20 according to Embodiment 1 of the present invention. In the figure, a three-dimensional model creation device 20 includes a shape information storage device 2
The shape determining device 24, the shape determining device 24, which sequentially reads the order identification information from No. 2 and determines whether to inhibit the creation of the thin shape.
Based on the determination result, the identification information editing device 26 stores the order identification information in the shape information storage device 22 in the order of the order identification information group and the order identification information of the shape that cannot be applied even if the thinning process is attempted later. A procedure information editing device 28 for associating the edited sequence identification information with the procedure information, and a creation prohibition removing device for removing from the shape information storage device 22 the sequence identification information of a shape that cannot be applied even if a thinning process is attempted later. 3
0, and the function selecting device 34 is connected to the external input device 32
To select each device corresponding to various commands. The shape creating / editing device 36 inputs a shape creating / editing command from the input device 32 and allows the external display device 38 to observe the shape creating / editing command.
A three-dimensional shape composed of elements such as points, lines, planes, and solids can be edited. In addition, the thin-walled shape creating device 40 can create a thin-walled shape while inputting a creation instruction from the input device 32 and observing the external display device 38. Further, the information access device 42
Stores and reads out the order identification information and the creation procedure for the appearance shape creation in the shape information storage device 22, and the shape determination device 24 cannot perform even if the thin-shape shape creation device 40 attempts the thinning process later. Shape can be detected.
The identification information editing device 26 edits the order identification information of the shapes that cannot be applied even if the thinning process is attempted later, and the procedure information editing device 28 identifies the order of the shapes that cannot be applied even if the thinning process is attempted later. Information and procedure information can be associated with each other. Furthermore, the creation prohibition removing device 30 can remove the order identification information of the shape that cannot be applied even if the thinning process is attempted later from the creation procedure of the thin shape. Further, the interface 44 includes the function selecting device 34 and the shape information storage device 2.
The external input / output device 46 can transfer sequence identification information and procedure information from the shape information storage device 22. Further, the display control device 48 can transfer the video signal to the display device 38 based on the bit information of the shape information storage device 22.

Input device 32 used in the present embodiment
Can be composed of, for example, a keyboard, a mouse, a stylus pen, and the like.
Can be constituted by a CRT of a cathode ray tube, an LCD of a liquid crystal display, an EL of electroluminescence, or the like.
Further, the shape information storage device 22 can be configured by a semiconductor storage device, a fixed magnetic disk device, or the like.

FIG. 2 is a block diagram showing a storage area of order identification information 52, element identification information 54, and procedure information 58 for creating an appearance shape of a three-dimensional model stored in the shape information storage device 22. The order identification information storage map 50 is composed of order identification information 52 indicating the order of creating each part shape of the three-dimensional model, and element identification information 54 specifying each part shape and position associated with the order identification information. I have. Further, the procedure information storage map 56 stores the procedure information 58 for instructing the creation procedure of each part shape corresponding to the element identification information 54 and the order identification information 60 after the order associated with the procedure information 58 has been replaced. It is configured to memorize. The procedure information 58 can include a shape creation command type for distinguishing a method of creating a solid specified by the element identification information 54, position information of a solid shape, and the like.
The order identification information of a shape that cannot be applied even if a thinning process is attempted later is deleted from the shape information storage device and can be associated again with the original order identification information that has been sorted. For example, the first order identification information 52 is stored in the first segment of the head address, and the cubic element identification information 54 associated with the first order identification information is stored in the second segment.
Is stored in the third segment, and the procedure identification information 60 describing the procedure of cube creation is stored in the third segment, and the sequence identification information 60 indicating that the procedure information is associated with the first procedure identification information 52 in the fourth segment. Is stored. In the next address, the first segment has the second order identification information 52, the second segment has the element identification information 54 of the gradual change R associated with the second order identification information, and the third segment has the gradual change R
The procedure information 58 describing the procedure of creation and the order identification information 60 indicating that the procedure information is associated with the second procedure identification information 52 can be stored in the fourth segment. The initial values are sequentially read out, and the order identification information 52 of the shape which cannot be applied even if the thinning process is attempted later is deleted, rearranged, or changed to the order identification information 52 such as the inner wall shape processing having a higher priority, and the three-dimensional information is obtained. Model thinning processing can be performed. The rearranged order identification information 52 may be stored in a memory provided separately from the shape information storage device as long as the order identification information 52 can be rearranged, in addition to being rewritten in the shape information storage device. Of course, the desired operation described above can be performed.

FIG. 3 is a flowchart showing the processing steps of the three-dimensional model creation device 20 according to the first embodiment of the present invention. In the figure, a three-dimensional model creation device 20
Is a step 62 of determining a shape creation / editing command or the like input from the external input device 32, a step 64 of determining whether or not the command is a thin shape creation command, and a step of executing a shape creation / editing process other than the thin shape creation command 66, Step 6 of branching from Step 64 to create a thin-walled shape
8, a step 70 for determining an external input / output command, a step 72 for processing an external input / output, and a step 74 for determining the end of the processing can create a thin shape of a three-dimensional model.

FIG. 4 is a flowchart showing the detailed processing of step 68 of the thin-walled shape processing of the three-dimensional model forming apparatus 20 according to the first embodiment of the present invention.
Step 68 of the thin shape processing is a step 76 of initializing data and a step 7 of storing a three-dimensional model shape.
8. Step 80 for detecting a shape that inhibits thinning;
Step 82 for determining whether a prohibited shape has been detected,
Step 8 of sifting the prohibited shapes, rearranging the storage positions of the thinned shape information, and removing the prohibited shape information
4. Step 86 of manually restoring the shape of the three-dimensional model from which the prohibited shape has been removed.

FIG. 5 is a flowchart showing the detailed processing of step 80 for detecting the shape for which the thinning is prohibited in the three-dimensional model forming apparatus 20 according to the first embodiment of the present invention. The step 80 of detecting a shape for which the thinning is prohibited is a step 8 of judging the creation of a shape having a thickness equal to or smaller than the limit thickness of the shape that cannot be applied even if a thinning process is attempted later.
8, a step 90 for editing the order information of the shape creation of the three-dimensional model, a step 92 for associating the shape creation procedure, and a step 94 for counting the shapes for which the thinning is prohibited, and the thinning stored in the shape information mechanism device 22. Can be counted.

FIG. 6 is a flowchart showing the detailed processing of step 90 for editing the order information of the shape creation of the three-dimensional model of the three-dimensional model creation device 20 according to the first embodiment of the present invention. . The step 90 of editing the order information includes a step 96 of storing the order information of the shape creation of the three-dimensional model, a step 98 of rearranging the order information of the shape creation for inhibiting the thinning, and a step 98 of converting the rearranged order information into the shape information. The method comprises the step 100 of storing the information in the storage device 22, and the order information of the prohibited shape can be stored after the order information that is not prohibited.

FIG. 7 is a flowchart showing the detailed processing of step 92 for associating the three-dimensional model shape creation procedure information with the three-dimensional model creation device 20 according to the first embodiment of the present invention. . The step 92 of associating the procedure information can be constituted by the step 102 of associating the original order information of the three-dimensional model shape creation before sorting with the procedure identification information of the three-dimensional model shape creation.

FIG. 8 is a flowchart showing the detailed processing of step 84 for removing the above-described prohibited shape in the three-dimensional model creating apparatus 20 according to the first embodiment of the present invention. The step 84 of removing the prohibited shape includes a step 104 of initializing the procedure identification information for creating a thin shape of the three-dimensional model, and the order identification information of the shape whose thickness is prohibited from being reduced from the order identification information for creating the final shape. The method may include a step 106 of removing the prohibited shape information by subtracting the number.

FIG. 9 is an external view showing a thin-walled shape 108 thinned by the three-dimensional model creating apparatus 20 according to the first embodiment on a display device 38. As shown in the figure, the thin-walled shape 108 can form an inner wall surface 110 with a predetermined thickness of 1.0 mm on the inside of the appearance shape 109 of the three-dimensional model. Is narrowed down to R0. A round shape of R0.5 can be formed on the inner corner portion 112 corresponding to the gradually changing round shape. That is, prior to this thinning processing, the order identification information is sequentially read from the shape information storage device, and, for example, after the corner 12 is created, the order identification information for making the inner wall corner of the corner 12 round is detected. The order of the order identification information is such that the shape processing of the inner wall corner is prohibited, removed from the shape information storage device, and the shape creation processing is executed by the element identification information and the procedure information corresponding to the order identification information that can be thinned. Can be changed. Similarly, when the corner portions 13 and 14 are preceded by the outer wall shape processing of the model, the order identification information of the inner wall corner shape processing to be read out later is removed so that the three-dimensional model creation processing is not interrupted. it can. Therefore, the illustrated outer wall corner 111 of the three-dimensional shape 108 reads the order identification information stored in the shape information storage device in the ascending order of creating the round shape of the outer wall corner 111 after the inner wall corner 112 is created. The three-dimensional shape corresponding to the removed order identification information can be manually removed from the partially completed three-dimensional model 108 in FIG. Additional shape creation such as addition can be performed interactively. Therefore, the three-dimensional model 108 can be completed with a few additional steps after the creation of most of the outer wall shape and the inner wall shape is completed. Therefore, by forming a process of forming a complicated front or back surface shape after a thinning process of a simple front or back surface shape, only a portion that can be thinned is selectively processed to achieve a final target model. The shape can be reduced in thickness.

According to the above-described embodiment, the image information is transmitted from the display control device 48 at the time of startup of the three-dimensional model creation device 20, and the screen is displayed on the display device 38. Various three-dimensional model forming commands are input from the input device 32 to the
The data is input to the dimensional model creation device 20, and the function selection device 34 can select any one of the shape creation / edit device 36 and the interface 44 in response to this command. When a shape creation / editing command is input from the input device 32, the condition of the above step 62 is satisfied, and the function selecting device 34 can call the shape creation / editing device 36. The shape creation / editing device 36 creates and edits a three-dimensional solid shape composed of a set of element identification information such as points, lines, planes, and solids based on the input shape creation / editing command,
The procedure creation information including the shape creation position can be associated with the shape creation order identification information and stored in the shape information storage device 22 in step 66. As a result, the display control device 48 reads the order identification information stored in the shape information storage device 22 in ascending order, and displays a three-dimensional model on the screen of the display device 38 based on the corresponding element identification information and shape creation procedure information. Can be displayed. The operator can input a shape creation / edit command from the input device 32 while observing the appearance shape displayed on the display device 38, and can create and edit the necessary appearance shape interactively.

When the thin shape creation command from the input device 32 satisfies the condition of step 64, the function selecting device 34 calls the thin shape creation device 40 to execute the thin shape creation processing step 68. it can. And
In the thin-walled shape creation processing step 68, the thin-walled shape creation device 40 executes a step 78 for storing the shape, and in step 80, detects a shape in which thinning is prohibited. Furthermore, when the condition of step 82 is satisfied, the thin-walled shape creating device 40 recognizes that the detection determination result is a shape removal command, and branches to step 84 for executing the removal of the next prohibited shape. The thin shape of the three-dimensional model from which the prohibited shape has been removed can be restored. On the other hand, in the detection processing step 80 of the shape in which the thinning is prohibited, the thin-shape forming device 40 executes the determination of the shape in which the thinning is prohibited in the step 88, and edits the shape forming order in a step 90.
Step 92 of associating with the shape creation procedure can be executed. In step 90 of executing the order editing of the shape creation, the order identification information of the shapes that cannot be applied even if the thinning process is attempted later is rearranged. That is, in step 98, the order identification information of a shape that cannot be applied even if the thinning process is attempted later can be stored after the order identification information that is not prohibited. Further, the permutation of the rearranged order identification information and the shape creation procedure information is executed in step 92, and the permuted order identification information defines the element identification information of the three-dimensional shape to be originally created and the procedure of creating the three-dimensional shape. A storage address can be associated to perform. With this correspondence, the order identification information can be stored in ascending order from the head address in the shape information storage device 22. Finally, in step 106, the order identification information of the shapes that cannot be applied even if the thinning process is attempted later is removed from the plurality of order identification information of the thin shape creation associated with the shape creation procedure, and the final thin shape creation is performed. Can be generated, and after the prohibition information is removed, the thinning processing of the three-dimensional model can be executed manually. In the present embodiment, the order identification information is stored in the shape information storage device 22 in ascending order from the top address. However, any means that can create the partial shape of the three-dimensional model in a predetermined order may be stored in descending order in addition to the ascending order storage. In addition, it is also possible to configure so as to search the order identification information and store the arbitrary order identification information at an arbitrary address.

Embodiment 2 In the first embodiment, the order identification information of the shapes that cannot be applied even if the thinning process is attempted later is removed from the shape information storage device. However, as shown in FIG. And then
The three-dimensional model can be created by rearranging the process order so that the inner wall shape processing is performed later. In other words, by rearranging the process of creating a complex front or back surface shape so that it is processed after the simple front or back surface thinning process, only those portions that can be thinned are selectively processed in preference to other processes. Then, a thinning process can be performed on the final target model shape.

FIG. 10 is a process diagram of a method for creating a three-dimensional model according to the second embodiment of the present invention. The cube 10 which is the starting three-dimensional shape is the same as the cube 10 of the conventional example in FIG. In FIG. 10, in step (1), the second order identification information of the created cube three-dimensional model 108 is read from the shape information storage device, and the second element identification information corresponding to this order identification information is read. The thickness of the three-dimensional model 108 of the reading cube can be reduced. The thinned three-dimensional model 108 includes the inner wall 11
0 is formed and the rough surface shape is determined. In the step (2), the third order identification information is read from the shape information storage device, and the element identification information of the third gradually changing R (1-0) corresponding to the third order identification information is read, and the third cube is read. The dimension model 108 can be thinned. The three-dimensional model 108 is formed with a gradually changing R-shaped corner 111 that is narrowed down to R1 at the front and R0 at the back. The outer wall corner forming steps from steps (3) to (5) are performed in step (2).
Similarly, the fourth to sixth order identification information is read from the shape information storage device, and the element identification information of the third gradually changing R (1-0) corresponding to each of the order identification information is read, and The three-dimensional model 108 can be thinned. In the three-dimensional model 108, the front is R1 and the rear is R
R-shaped corners 113-1 of the gradually changing R narrowed down to 0
15 are formed. At this point, the three-dimensional model 108
The shape of the outer wall is substantially determined, and the process can proceed to the inner wall processing step (6). In the step (6), the seventh order identification information is read from the shape information storage device, and the element identification information of the fourth gradually changing R (0.5-0) corresponding to the seventh order identification information is read. Can be read out and a round shape can be created at the inner wall corner of the cubic three-dimensional model 108. That is,
The radius obtained by subtracting 0.5 from the thickness of the outer wall from R1 of the outer wall can be the maximum radius shape of the gradually changing R so as to maintain the limit plate thickness of 0.5. 1
16 has a gradually changing R-shaped shape in which the front is narrowed to R0.5 and the rear is narrowed to R0. Further, the same processing as in the step (6) can be repeated on other corners of the inner wall 110 to form a radius R (0.5-0) of a gradual change (not shown). Therefore, the process of creating a complicated front or back surface shape is preferentially performed with a process of reducing the thickness of the simple front or back surface shape, and then rearranged so that the complicated front or back surface shape is processed later. Only the portion that can be made thinner can be selectively processed prior to other processes, and thinning processing can be performed on the final target model shape. Therefore, while retaining the contents of the procedural information of a shape that cannot be applied even if a thinning process is attempted later, the contents are rearranged after the other procedural information groups of the thinning process, and then the contents of the rearranged order identification information are ascending. Alternatively, by re-editing in descending order, a complicated front or back surface shape can be applied. Further, in the present embodiment, the shape information storage device may be configured as a single unit or a plurality of units, and one of the units may be stored in any one of the units until the procedural information of the shape that cannot be applied even if a thinning process is attempted later is detected. The processing information for performing the thinning process read from the unit can be separately stored in another storage device.

FIG. 11 is a flowchart showing a method for creating a three-dimensional model according to the second embodiment of the present invention.
In the three-dimensional model creation method, a step 118 for sequentially reading out the order identification information, a step 120 for judging the prohibition of the creation of the thin shape, and a step for continuously storing the order identification information in the shape information storage device based on the judgment result 122,
Step 124 of stacking the order identification information of the shapes that cannot be performed even if the thinning process is attempted after the condition of step 120 is satisfied, and order identification information of the shapes that cannot be performed even if the thinning process is attempted after the stack storage. Is popped and sequentially stored in the shape information storage device following the order identification information of the shapes that can be created, and a three-dimensional model of a thin shape is created by associating the order identification information with the procedure information. Step 126 can be configured. In step 128, it is possible to determine whether or not all of the elements constituting the three-dimensional model have been read out.
A dimensional model can be created. Therefore, in the thinning process of the three-dimensional model created in a random order, the shape information prohibiting the thinning is extracted and the order is merely changed, and the thin shape is automatically and continuously processed without the intervention of the operator. Can be created.

Embodiment 3 In the first and second embodiments, the order identification information of the shapes that cannot be applied even if the thinning process is attempted after the sequential reading is removed or rearranged from the shape information storage device. An inner wall model that defines a predetermined plate thickness is created from the three-dimensional solid shape information as shown in FIG.
A dimensional model can be created.

FIG. 12 is a flowchart showing a three-dimensional model creation method according to the third embodiment of the present invention.
The three-dimensional model creation method is based on the shape information storage devices 22 to 3
Step 130 for reading out the three-dimensional shape information, step 132 for judging the prohibition of the creation of the thin-walled shape with respect to the read-out three-dimensional shape information. Then, in step 134, the inner wall surface of the thin shape is predicted based on the coordinates of the intersection of the extension lines from the three-dimensional three-dimensional shape information of the adjacent thin shape creatable area. An inner wall model that defines a predetermined plate thickness is created from this prediction result, and an inner wall shape model to be added to this inner wall model can be read from the shape information storage device 22 to add the inner wall shape model. Then, when it is determined in step 138 that all the element information constituting the three-dimensional model has been read, the process branches to step 140, where the thin-walled shape described above and the three-dimensional solid shape previously read out in step 130 are compared. Can be configured to be combined. According to the present embodiment, for example, it is possible to form a thin-walled three-dimensional model based on the three-dimensional model information of the appearance shape of the clay model created in the design department. At that point, the outer packaging of the product can be designed immediately.

FIG. 13 shows a three-dimensional model 142 of an intermediate process using the three-dimensional model creation method according to the third embodiment of the present invention.
FIG. In the figure, the three-dimensional model 142 is
Top 144, right outer wall 146, upper inner wall 148, right inner wall 150, gradually changing R (1-0) 152, upper inner wall end 15
4, right inner wall end 156, predicted inner wall intersection coordinates 158,
3D model 1 for convenience
42 is an enlarged view of the right corner. This is in the process of completing 3
The plate thickness 162 from the intersection coordinates 158 to the gradual change 152 of the dimensional model 142 is 0.5 or less of the limit plate thickness, and it is determined that the upper right corner of the inner wall model cannot be created.
In the present embodiment, even if it is determined that the creation is prohibited, the model creation processing is continued until the inner wall model is completed, and the intersection of the upper inner wall 148 and the right inner wall 150, whose creation is prohibited, is performed. Is calculated, and another inner wall model that connects the upper inner wall end 154 and the right inner wall end 156 as shown in FIG. 14 is searched. It can be added to the intersection coordinates 158.

FIG. 14 is an intermediate process in which an inner wall model having inner walls 148 and 150 is created on the three-dimensional model 142 of FIG. 13 and then an inner wall corner 164 of the gradually changing R (0.5-0) is created. FIG. In the figure, the inner wall corner 164
The plate thickness 166 of the outer wall and the gradually changing outer wall R (1-0) 152 is equal to 0.1.
Five or more can be secured, and the three-dimensional model can be completed without stopping the thinning processing program. In other words, according to the present embodiment, even if an intermediate step of creating a partial shape smaller than the limit thickness is included, three-dimensional The strength of the model can be maintained.
Further, in the present embodiment, the plate thickness between the intersection coordinates 158 and the gradual change 152 of the outer wall is equal to or smaller than the limit plate thickness. However, when the inner wall model that defines the limit plate thickness is a cubic shape, FIG. By creating the cubic inner wall model before creating the gradual change of the outer wall as in step (1), the intersection coordinates 158
It is needless to say that the plate thickness of the gradual change 152 can be made larger than the limit plate thickness. In this case, when the prohibited shape is read from the shape information storage device, the process is rewritten to the order identification information to be read initially so as to increase the priority of the process of creating the inner wall model, the order identification information is rearranged, and the thinning process is performed. And automatically create a thinner three-dimensional model without interrupting the three-dimensional model creation program.

According to the above description, a thin-walled model is created by combining two pieces of model information, that is, the external shape information of the three-dimensional model and the inner wall surface information. Can be appropriately changed.
For example, a cube having a small radius smaller than a predetermined thickness and a complicated shape whose thickness cannot be uniquely determined.
When creating a thin model of a three-dimensional model, first, an inner surface model similar to the cubic shape of a three-dimensional model having a predetermined thickness is determined from the surface of the external shape, and then a larger internal shape model than the external shape of the three-dimensional model is determined. After synthesizing the simple three-dimensional model of the pure cube and the inner surface model, the shape of the radius part having a small radius smaller than a predetermined thickness and located at the corner of the three-dimensional model of the pure cube is determined. It is also possible to create a thin-walled model.

[0042]

Since the present invention is configured as described above, it has the following effects.

By storing the processing information read until a shape which cannot be applied even if the thinning process is attempted later is detected in the second storage unit, it is possible to extract only the processing information that can be thinned. it can.

Further, it is possible to process the thinned three-dimensional model on the basis of the processing information read until a shape which cannot be applied even if a thinning process is attempted later is detected.

Further, it is possible to separate and extract the processing information read until a shape which cannot be applied even if a thinning process is attempted later is detected.

Further, it is possible to continue to create a thinned three-dimensional model until a shape that cannot be applied even if a thinning process is attempted later is detected.

Further, the hardware resources can be effectively used by sharing a plurality of storage units.

Further, the processing information read until a shape which cannot be applied even if a thinning process is attempted later is detected is stored in the second processing information.
, Only the processing information that can be reduced in thickness can be extracted.

Further, it is possible to process the thinned three-dimensional model based on the processing information read out until a shape which cannot be applied even if the thinning process is attempted later is detected.

Further, it is possible to separate and extract the processing information read out until a shape which cannot be applied even if a thinning process is attempted later is detected.

Further, it is possible to continue to create a thinned three-dimensional model until a shape that cannot be applied even if a thinning process is attempted later is detected.

Also, it is determined whether or not the creation of a thin-walled shape is prohibited, the order of creating the three-dimensional model is changed, and the order identification information for inhibiting the thinning is removed. Can be executed continuously, so that 3
A thin-walled model can be easily created based on the appearance shape information of the dimensional model.

Further, by changing the order of the order identification information,
Since the element identification information and the procedure information correspond to the changed order identification information, a thin-walled three-dimensional model can be automatically created.

Further, a thin-walled three-dimensional model having a predetermined thickness can be created by creating an inner wall model for defining the thickness and then combining it with a three-dimensional solid shape.

[Brief description of the drawings]

FIG. 1 is a block diagram of a three-dimensional model creation device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an identification information storage area used in the first embodiment of the present invention.

FIG. 3 is a flowchart of a three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 4 is a flowchart of the three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 5 is a flowchart of a three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 6 is a flowchart of a three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 7 is a flowchart of the three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 8 is a flowchart of the three-dimensional model creation device according to the first embodiment of the present invention.

FIG. 9 is an external view of a thin-walled shape which is being completed by the three-dimensional model creating apparatus according to the first embodiment of the present invention.

FIG. 10 is a process chart of creating a three-dimensional model according to the second embodiment of the present invention.

FIG. 11 is a flowchart of a three-dimensional model creation method according to the second embodiment of the present invention.

FIG. 12 is a flowchart of a three-dimensional model creation method according to a third embodiment of the present invention.

FIG. 13 is a process diagram of creating a three-dimensional model according to the third embodiment of the present invention.

FIG. 14 is a process chart of creating a three-dimensional model according to the third embodiment of the present invention.

FIG. 15 is a block diagram of a conventional model creation device.

FIG. 16 is an external view of a thin-walled shape created by a conventional three-dimensional model creation device.

FIG. 17 is a process diagram showing a conventional three-dimensional model creation process.

[Explanation of symbols]

20 three-dimensional model creation device, 22 shape information storage device, 24 shape determination device, 26 identification information editing device, 2
8 Procedure information editing device, 30 Creation prohibition removing device, 32
External input device, 34 function selection device, 36 shape creation / editing device, 38 display device, 40 thin shape creation device, 42 information access device, 44 interface, 48 display control device.

Claims (12)

[Claims] 1. A three-dimensional model creating apparatus having a creating unit for creating a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit for creating a shape, wherein an entire shape of the three-dimensional model is created. A first storage unit that stores processing information for performing the processing, a detection unit that reads out the plurality of pieces of processing information and detects a shape in which a thinning process is prohibited, and the thin wall based on a detection result of the detection unit. A second storage unit that stores the processing information read from the first storage unit until a shape whose conversion processing is prohibited is detected. 2. A method for forming a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit to create a shape.
A three-dimensional model creation device, comprising: a first storage unit that stores machining information for creating an overall shape of the three-dimensional model; and a plurality of pieces of machining information that are read to detect a shape in which a thinning process is prohibited. A three-dimensional shape is created in accordance with processing information read from the first storage unit until a shape for which the thinning process is prohibited is detected based on a detection result of the detection unit. A three-dimensional model creation device, comprising: a creation unit. 3. A three-dimensional model creating apparatus having a creating unit for creating a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit for creating a shape, wherein an entire shape of the three-dimensional model is created. A first storage unit that stores processing information for performing the processing, a detection unit that reads out the plurality of pieces of processing information and detects a shape in which a thinning process is prohibited, and the thin wall based on a detection result of the detection unit. A second storage unit that separately stores processing information for performing a thinning process and processing information read from the first storage unit until a shape in which the thinning process is prohibited is detected; A three-dimensional model creation device, comprising: 4. Creating a three-dimensional model according to a plurality of pieces of processing information read from a storage unit to create a shape.
A three-dimensional model creation device, comprising: a first storage unit that stores machining information for creating an overall shape of the three-dimensional model; and a plurality of pieces of machining information that are read to detect a shape in which a thinning process is prohibited. A detecting unit that performs, based on a detection result of the detecting unit, creates the three-dimensional model according to processing information for performing the thinning process;
And a creating unit that continues creating the three-dimensional model according to the processing information read from the first storage unit until a shape in which the thinning process is prohibited is detected. 3D model creation device. 5. The three-dimensional model creation device according to claim 1, wherein the first storage unit and the second storage unit are shared. 6. A method for creating a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit for creating a shape.
A dimensional model creation method, comprising: a step of reading the plurality of pieces of processing information to detect a shape in which the thinning process is prohibited; and a process in which the shape in which the thinning process is prohibited is based on a detection result of the detection unit. Storing the processing information read from the plurality of pieces of processing information until it is detected. 7. A method for creating a three-dimensional model in accordance with a plurality of pieces of processing information read from a storage unit for creating a shape.
A dimensional model creation method, comprising: a step of reading the plurality of pieces of processing information to detect a shape in which the thinning process is prohibited; and a process in which the shape in which the thinning process is prohibited is based on a detection result of the detection unit. Creating a three-dimensional model in accordance with the processing information read from the plurality of pieces of processing information until it is detected. 8. A method of creating a three-dimensional model according to a plurality of pieces of processing information read from a storage unit for creating a shape.
A method for creating a dimensional model, comprising: a step of reading the plurality of pieces of processing information to detect a shape in which the thinning processing is prohibited; and processing information for performing the thinning processing based on a detection result of the detection unit. And storing separately the processing information read out of the plurality of pieces of processing information until a shape in which the thinning processing is prohibited is detected. Method. 9. A method for creating a three-dimensional model according to a plurality of pieces of processing information read from a storage unit for creating a shape.
A method for creating a dimensional model, comprising: a step of reading the plurality of pieces of processing information to detect a shape in which the thinning processing is prohibited; and processing information for performing the thinning processing based on a detection result of the detection unit. Creates the three-dimensional model according to
Thereafter, continuing to create the three-dimensional model in accordance with the processing information read from the plurality of pieces of processing information until a shape in which the thinning processing is prohibited is detected. 3D model creation method. 10. A three-dimensional model creation device for creating a thin-walled three-dimensional model based on three-dimensional shape information of order identification information and procedure information stored in a shape information storage device for creating an external shape. A shape determining device that sequentially reads the order identification information to determine whether to inhibit the creation of a thin shape; and, based on the determination result of the shape determining device, performs a sequence identification information group and a subsequent thinning process. An identification information editing device that stores the order identification information in the shape information storage device in the order of the order identification information of the missing shapes; a procedure information editing device that associates the edited sequence identification information with the procedure information; A creation prohibition removing device for removing, from the shape information storage device, the order identification information of a shape that cannot be applied even if a thinning process is attempted. Location. 11. A method for creating a three-dimensional model of a thin-walled shape based on order identification information for creating an external shape stored in a shape information storage device and three-dimensional three-dimensional information of procedure information. Information is sequentially read to determine the prohibition of the creation of a thin shape, and based on the determination result, the sequence identification information is continuously stored in the shape information storage device, and subsequent thinning processing cannot be performed even if attempted. A three-dimensional model creating method, comprising storing shape order identification information, and creating a thin-walled three-dimensional model by associating the order identification information with the procedure information. 12. A method for creating a three-dimensional model of a thin shape based on three-dimensional three-dimensional shape information for creating an external shape stored in a shape information storage device, comprising: The information is read to determine the prohibition of the creation of the thin-walled shape. Based on the determination result, an inner wall model that defines a predetermined plate thickness is created from the three-dimensional three-dimensional shape information of the area where the thin-walled shape can be created. A three-dimensional model creation method characterized by combining with a three-dimensional shape.