JP2013178596A - Three-dimensional shape creation support program, method, and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support implementation of efficient work in three-dimensional shape creation using history type data.SOLUTION: In a three-dimensional shape creation support device 1, a determination unit 12 determines whether or not features of each work fall under manufacturing requirement features from history type data in which a plurality of features representing a three-dimensional shape of a model are recorded in work order. A rearrangement unit 13 moves the work order of the features that have been determined to fall under the manufacturing requirement features, subsequent to the work order of another feature of the history type data, while retaining the work order between the features that have been determined to fall under the manufacturing requirement features.

Description

  The present invention relates to a data processing technique for supporting creation of a three-dimensional shape.

  The three-dimensional CAD system is roughly divided into two types, a history CAD system and a non-history CAD system, from the type of data defining the three-dimensional shape.

  In the history CAD system, the history of features given to an object when generating a three-dimensional shape and the hierarchical relationship of features are maintained, and data defining the final shape is generated by a feature setting process. In the non-history CAD system, data defining the final geometric shape is generated without maintaining the feature history and parent-child relationship given to the object at the time of generation.

  Here, the feature is a component of the three-dimensional shape of the target object and is an attribute indicating a certain shape characteristic. Features include extrusion, cut, join, fillet, draft, etc. Each feature has its parameters set in different ways.

  The data (history data) output by the history CAD system records the work history at the time of creating the three-dimensional shape, and includes the feature setting history set for the object. For this reason, the designer has an advantage that the work process can be confirmed by looking at the history type data, and the three-dimensional shape can be corrected by changing only the related features. Therefore, it is possible to efficiently create and modify a three-dimensional shape by utilizing the characteristics of history data. In particular, when making a simple correction of a three-dimensional shape, it is only necessary to reset the feature to be corrected, so that the correction work becomes easy.

  The non-history data has a smaller data amount than the history data, and the non-history data is used in the manufacturing process. For example, as a conventional method, conversion processing from historical data to non-history data is performed, and at the time of conversion, attribute information indicating correspondence with component parts is extracted from feature information for each geometric element. It is known to add and delete information other than attribute information.

JP 2003-196320 A

  When modifying a 3D shape, specify the work with the feature related to the shape to be deformed from the work history recorded in the history data indicating the current model, and change the parameter of the feature. Is called.

  FIG. 18 is a diagram illustrating an example of a display screen of history data in the history CAD system. In the example of the display screen shown in FIG. 18, the work history included in the history type data is displayed as a list of work names in the left column, and the hierarchical relationship of each work history is displayed in the right column.

  In historical data, the more complex the model shape, the greater the number of work histories and the more complicated the hierarchical relationship. Further, each work history is displayed together with an identification number as in the display screen shown in FIG. 18. However, since a number of works having the same name are displayed, the work of specifying a work history to be corrected is inefficient. Therefore, in the actual correction work, there is a problem that it takes a long time to specify the work history to be corrected before correcting the feature, and the correction man-hours become large. In particular, if you want to reuse 3D shape history data designed by others, it is difficult to know the procedure by which others created the shape, and you would like to modify the history data. It takes a longer time to identify the history.

  Furthermore, the history type data has a feature that features are recorded in accordance with the work order. For this reason, there is a problem that if the work is not performed in accordance with the design procedure of specifying the manufacturing requirements after determining the base shape, the manufacturing requirements may be violated by the subsequent modification of the three-dimensional shape.

  Manufacturing requirements are requirements that are required in the manufacturing process of a model. For example, conditions for drawing out from the mold, conditions for the size and depth of the screw holes, and the like. Among features exhibiting shape characteristics, there are features that are manufacturing requirements, such as fillets, screw holes, drafts, and the like. In the following description, a feature indicating a manufacturing requirement may be referred to as a manufacturing requirement feature.

  FIG. 19 is a diagram showing an example of design requirement violation caused by the design procedure. FIG. 19A is a diagram showing a model of a boss (projection) adjacent to a vertical wall and the top surface of the model, FIG. 19B is a diagram showing an example of a design work procedure, and FIG. It is a figure showing the upper surface of the model after correction.

  At the time of designing in FIG. 19A, it is assumed that the subsequent modification, for example, the change in the thickness of the vertical wall is not assumed, and the design is performed according to the procedure shown in FIG. That is, first, the base shape of the “boss” is determined (procedure 1), the feature “drilling” is set for the “boss” with a screw hole according to the manufacturing requirements (procedure 2), and the boss shape is completed. Thereafter, the base shape of the “vertical wall” is determined (procedure 3), and the “vertical wall” is joined to the “boss” at a position where the screw hole is not blocked (procedure 4). In this case, in the history type data, the work history of procedure 1, procedure 2, procedure 3, and procedure 4 showing the three-dimensional shape of FIG. 19A is recorded.

  When changing the thickness of the “vertical wall” of the model, the user specifies the history of step 3 from the history type data recording the work history shown in FIG. 19B, and sets the thickness of the “vertical wall”. Correct (extrusion). However, since the contents of the next step 4 remain unchanged, as shown in FIG. 19 (C), the “longitudinal wall” interferes with the screw hole of the “boss” due to an increase in the parameter of “extrusion”, and the manufacturing requirements It becomes a violation. This is because the base shape of the vertical wall was designed after setting the screw holes, which is a manufacturing requirement.

  As described above, when a model whose solid shape is defined by history data is to be corrected, it should be corrected by remembering the work procedure when designing the model or understanding the work procedure of others. The feature must be specified and corrected, and the number of work steps before the three-dimensional shape correction work is increased. In particular, in the case of a model with a long work history, the man-hours for specifying the feature to be corrected become larger.

  In addition, if there is work related to the setting of the base shape of the model after work related to the setting of features indicating manufacturing requirements, the correction of the feature settings may cause a violation of manufacturing requirements.

  An object of the present invention is to provide history-type data that facilitates finding manufacturing requirement features and does not cause manufacturing requirement violations, and supports efficient three-dimensional shape creation.

  A three-dimensional shape creation support program disclosed as one aspect of the present invention is a computer-readable recording medium in which a plurality of features indicating a three-dimensional shape of a model are recorded in order of work, and each work feature is a manufacturing requirement feature. The work order of the features determined to correspond to manufacturing requirement features is determined between the features determined to correspond to manufacturing requirement features after the work order of other features in the history data. The process of moving while maintaining the work order is executed.

  In addition, a three-dimensional shape creation support method disclosed as another aspect of the present invention is a method in which a computer uses a history type data in which a plurality of features indicating a three-dimensional shape of a model are recorded in order of work, It is determined whether or not the feature is a manufacturing requirement feature, and the work order of the feature determined to be a manufacturing requirement feature is determined to be a manufacturing requirement feature after the work order of other features of the history data. A process of moving while maintaining the work order between the features is executed.

  Further, the three-dimensional shape creation support apparatus disclosed as another aspect of the present invention is characterized in that each work feature is obtained from history-type data in which a plurality of features indicating the three-dimensional shape of the model are set in the work order. A processing unit for determining whether the feature corresponds to the manufacturing requirement feature, and the work order of the feature determined to correspond to the manufacturing requirement feature is applied to the manufacturing requirement feature after the work order of other features of the history data. And a processing unit that moves while maintaining the work order between the determined features.

  According to the three-dimensional shape creation support program disclosed as one aspect of the present invention, when creating a three-dimensional shape using history-type data, it is possible to provide a work environment that increases work efficiency. There is an effect that it is possible to prevent an increase in the number of man-hours for creating the dimensional shape.

It is a figure which shows the block structural example of the three-dimensional shape creation assistance apparatus in one Example of this invention. It is a figure which shows the three-dimensional shape of the components used as a process target in a present Example. It is a figure which shows the data structural example of history type data. It is a figure which shows the example of a model image of the relationship of the work history of history type data, and each work history. It is a figure which shows the example of an outline process flow of a three-dimensional shape creation assistance apparatus. It is a figure which shows the example of the history type data to which the manufacturing requirement was set. It is a figure which shows the processing flow example of the determination processing of the drilling for screws among manufacturing requirement features. It is a figure which shows the example of a display of the function of the work history based on history type data. It is a figure which shows the example of the history type data to which the non-manufacturing requirement was set. It is a figure which shows the example of a model image of the relationship of the work history of history type data, and each work history. It is a figure which shows the example of a rearrangement of work history. It is a figure which shows the rearrangement example of the work history of a specific manufacture requirement feature. It is a figure which shows the example of the model image of the relationship of the work history based on history type data, and each work history. It is a figure which shows the mismatch of a base shape and an example of a highlight display. It is a figure which shows the example of processed history type data. It is a figure which shows an example of the hardware constitutions of the three-dimensional shape creation assistance apparatus. It is a figure for demonstrating suppression of the manufacturing requirement violation by a three-dimensional shape creation assistance apparatus. It is a figure which shows the example of a display screen of the history type data in a history type CAD system. It is a figure which shows the example of a design requirement violation which arises by a design procedure.

  Hereinafter, a three-dimensional shape creation support device disclosed as one aspect of the present invention will be described.

  FIG. 1 is a diagram showing a block configuration example of a three-dimensional shape creation support apparatus according to an embodiment of the present invention.

  The three-dimensional shape creation support apparatus 1 includes a data acquisition unit 11, a determination unit 12, a rearrangement unit 13, a model display unit 15, and a data storage unit 16.

  The data acquisition unit 11 acquires the history data 2 from a history CAD system, a storage medium, etc. (not shown in FIG. 1).

  The history-type data 2 is a work history when a three-dimensional shape of an object is created by the history-type CAD system, and is data in which information on features set for the object for each work is recorded. Details of the data structure and the like of the history type data 2 will be described later.

  The determination unit 12 determines whether each feature set in the work history recorded in the history data 2 acquired by the data acquisition unit 11 is a manufacturing requirement feature. The manufacturing requirement feature is a feature indicating a manufacturing requirement which is a manufacturing restriction, and is a feature indicating a shape characteristic such as “drilling”, “fillet”, “draft”, for example.

  The determination unit 12 can determine the manufacturing requirement feature based on a command set in the work. For example, a set of “cut” and “extrude” commands (represented as “extrude (cut)”) is determined as “drilling”. The “fillet” and “draft” commands are determined as “fillet” and “draft” features, respectively.

  Further, in the case of “drilling”, the determination unit 12 determines that the hole diameter set in “extrusion (cut)” matches a pre-registered tool size for “drilling” (for example, drill mill diameter). In addition, the feature of the corresponding work history can be determined as the manufacturing requirement feature.

  Further, when information indicating that it is a manufacturing requirement (manufacturing requirement: M) is attached to the work history feature of the history type data 2, the determination unit 12 determines the feature as a manufacturing requirement feature, When the information indicating that it is a manufacturing requirement (non-manufacturing requirement: D) is given, the feature can not be determined as a manufacturing requirement feature.

  Further, the determination unit 12 displays the feature of the work history recorded in the history type data 2 on the display device, or displays the feature determined as the production requirement feature on the display device (not shown in FIG. 1). , Whether the displayed feature is the manufacturing requirement M or the non-manufacturing requirement D can be set based on the user designation obtained through the input device (not shown in FIG. 1).

  The rearrangement unit 13 extracts the work history determined as the production requirement feature from the history type data 2, and after the work order of the work history of other features recorded in the history type data 2, the extracted production requirement feature The work order between the work histories is maintained and moved.

  Furthermore, the rearrangement unit 13 can move the work history of a specific manufacturing requirement feature between the work histories of the moved manufacturing requirement features so as to be positioned after the work histories of the remaining manufacturing requirement features.

  The model display unit 15 generates a three-dimensional shape model to be processed based on the history data 2 and displays it on the display device.

  Further, the model display unit 15 creates a three-dimensional shape model before movement and a three-dimensional shape model after movement based on the history type data 2 before and after moving the work history of the manufacturing requirement feature, and compares the two models. In addition, corresponding portions included in the two models and portions where the base shapes do not match can be highlighted. Here, the highlight display indicates a display mode different from the normal display mode, and includes all display modes such as different display colors, display patterns, and blinking.

  The data storage unit 16 outputs the processed history type data 3 obtained by moving the work history of the manufacturing requirement feature in the history type data 2 to a predetermined data processing device or stores it in a predetermined data storage unit.

  FIG. 2 is a diagram showing a three-dimensional shape of a part to be processed in this embodiment. The part is a combination of a boss having a screw hole and a vertical wall.

  FIG. 3 is a diagram illustrating a data configuration example of the history type data 2. FIG. 3 is an example of the history data 2 of the parts shown in FIG. Each row of the history type data 2 indicates work history data of each work. The history type data 2 includes an “ID (identification number)” for identifying a work history, a “base shape” indicating the shape of a model to be processed in the work, a “command” indicating a processing command in the work, and a command. Data items such as “parameter” indicating a set parameter and “manufacturing requirement” indicating information indicating whether the requirement is a manufacturing requirement or a non-manufacturing requirement are provided.

  When the data acquisition unit 11 acquires the history type data 2 including the data item “ID, base shape, command, parameter”, the data acquisition unit 11 adds the data item “manufacturing requirement” to the acquired history type data 2.

  The history type data 2 shown in FIG. 3 indicates that work is executed in the order of IDs “01”, “02”,... “07”. As the work history, for example, the work with ID = 04 is a work in which a feature called “fillet” of 3 mm (millimeters) is set for the base shape (base 3) processed in the work with IDs 01 to 03. Indicates that

  FIG. 4A is a diagram showing a relationship between work histories of the history type data 2 shown in FIG. 3, and FIG. 4B is a diagram showing a model image example of each work history. The numbers “01 :, 02 :,...” In FIGS. 4A and 4B represent “ID” of the history type data 2 shown in FIG.

  From the relationship of the work history shown in FIG. 4A, it can be seen that the work with ID = 04 was performed after the work with ID = 03. Further, the three-dimensional shape created by the operation of ID = 04 from the model image shown in FIG. 4B, that is, the three-dimensional shape after the fillet is applied to the base shape (base3).

  FIG. 5 is a diagram illustrating an example of an outline processing flow of the three-dimensional shape creation support apparatus 1.

  The data acquisition unit 11 of the three-dimensional shape creation support apparatus 1 acquires the history type data 2 shown in FIG. 3 (step S1).

  The determination unit 12 determines whether the feature of each work history recorded in the history type data 2 corresponds to the production requirement feature (step S2).

  The determination unit 12 can perform the following processing as the manufacturing requirement determination processing in step S2.

  As a first determination process, the determination unit 12 determines whether the feature of each work history is a manufacturing requirement feature from the “command” executed in the work.

  The determination unit 12 holds in advance the types of commands that are manufacturing requirement features. For example, if the manufacturing requirement feature is drilling for a screw, fillet, draft angle, etc., the commands “Extrude (cut)”, “Fillet”, “Draft angle” are set as applicable commands. To do.

  More specifically, the determination unit 12 examines the commands in order from the first data of the history type data 2, and the feature of the work history corresponding to any of “extrude (cut)”, “fillet”, and “draft”. Are determined to be manufacturing requirement features.

  As an example, the determination unit 12 does not correspond to the above commands (push (cut), fillet, draft) for the work history of ID = 01 in the history type data 2 of FIG. It is determined that the work history feature is not a manufacturing requirement feature. Next, since the command corresponds to the above command (push (cut)) for the work history with ID = 02, the determination unit 12 determines that the feature of the work history with ID = 02 is a manufacturing requirement feature. .

  Here, the feature of the command “push (cut)” does not always correspond to the manufacturing requirements for drilling screws. Therefore, it is preferable that the determination unit 12 further determines whether or not the feature is a hole for a screw, based on the work history determined as the manufacturing requirement feature from the command. Details of the process for determining whether a feature is a screw hole will be described later.

  If the determination unit 12 determines that the feature of the work history with ID = 02 corresponds to the drilling of a screw, the determination unit 12 sets the manufacturing requirement to “manufacturing requirement” with ID = 2 of the history type data 2 in FIG. Information “M” indicating that the On the other hand, when it is determined that the work history of ID = 02 does not correspond to “drilling” for screws, the determination unit 12 has information “D” indicating that “manufacturing requirement” of ID = 02 is a non-manufacturing requirement. Set.

  Similarly, the determination unit 12 checks the command for the remaining work history data of the history type data 2 and sets “M” to “manufacturing requirement” when determining that the feature is a manufacturing requirement feature. .

  FIG. 6 is a diagram illustrating an example of history type data in which manufacturing requirements or non-manufacturing requirements are set. In the history type data 2 of FIG. 6, information “M” indicating that it is a manufacturing requirement is set to the feature of the work history with the ID “02, 04, 06, 07” according to the determination result of the determination unit 12.

  Through the processing described above, the 3D shape creation support apparatus 1 can automatically extract features related to manufacturing requirements without omission even if the number of work histories recorded in the history data 2 is enormous. .

  FIG. 7 is a diagram illustrating an example of a processing flow of a determination process for drilling a screw among the manufacturing requirement features.

  The determination unit 12 picks up the center of the arc from the model (part) indicating the setting result of the feature of the work history (ID = 02) corresponding to the command “push (cut)” (step S20), and further determines the arc from the wire frame of the part. A plane including the center is defined (step S21). Next, the determination unit 12 defines a sphere corresponding to a pre-registered tool size for a screw hole, for example, a drill mill diameter (step S22). Then, the determination unit 12 matches the plane arc center and the sphere center (step S23), and offsets the plane several times at a predetermined interval (several mm (millimeters)) (step S24).

  The determination unit 12 checks whether the plane and the side surface of the opening by drilling (recognize the center of the arc from the intersection with the arc (Step S25) in each offset plane. Is not recognized (N in step S25), the determination unit 12 determines that the opening (hole) by this operation (drilling) is not a through hole (screw hole) for a screw having a predetermined depth. Then, it is determined that the feature is not a production requirement feature, and a non-manufacturing requirement (D) is set in the “manufacturing requirement” of the history type data 2 (step S26).

  On the other hand, when the arc center is recognized on the offset plane (Y in step S25), the determination unit 12 defines a normal vector by connecting the arc centers of the offset plane (step S27), and determines the sphere center. It is moved along the normal vector (step S28), and it is examined whether the sphere interferes with the opening (hole) by drilling (step S29). If the sphere does not interfere with the opening (hole) by drilling (N in step S29), the determination unit 12 determines that the opening (hole) by this operation (drilling) is a screw hole and determines that it is a manufacturing requirement feature. , Manufacturing requirement (M) is set in “manufacturing requirement” of history type data 2 (step S210).

  On the other hand, if the sphere interferes with the opening (hole) due to drilling (Y in step S210), the determination unit 12 displays the model, displays the location where the interference with the sphere has occurred, and highlights the user. In addition, the user is prompted to specify whether the hole is a screw hole (step S211).

  If the designation of a screw hole is acquired by a user operation (Y in step S212), the process proceeds to step S210. If the designation of not being a screw hole is acquired (N in step S212), step The process proceeds to S26.

  Note that the processes in steps S211 and S212 may be executed in a manufacturing requirement feature selection process by a user and a model display process (step S6 in FIG. 5) described later.

  Through the above-described processing, the 3D shape creation support device 1 automatically extracts only the features for which the drilling for the screw is set, as the manufacturing requirement features, from the features by the “extrusion (cut)” command for creating the opening. Or the user can confirm whether the hole is for a screw.

  As the second determination process, the determination unit 12 extracts a feature corresponding to the manufacturing requirement feature from the work history features recorded in the history type data 2, displays the extracted manufacturing requirement feature, and manufactures it to the user. Specify whether it is a requirement feature. Here, it is assumed that the feature extraction process corresponding to the production requirement feature is extracted based on a command, as in the first determination process.

  The determination unit 12 may display all the features of the work history recorded in the history type data 2 and allow the user to specify whether or not the feature is a manufacturing requirement feature.

  FIG. 8 is a diagram showing a display example of work history features based on the history type data 2 shown in FIG. In FIG. 8, among work history features, work histories determined as manufacturing requirement features by a command are surrounded by rounded rectangles.

  Here, it is assumed that the “fillet” in the work history of ID = 04 is not set due to manufacturing restrictions but set from the viewpoint of design.

  When the determination unit 12 obtains the designation that the “fillet” of the work history with ID = 04 is not a non-manufacturing requirement by a user operation via the input device, as shown in FIG. The non-manufacturing requirement (D) is set in the “manufacturing requirement” of ID = 04. As a result, the features of the work history having IDs “02”, “06”, and “07” of the history type data 2 are set as the production requirement features.

  FIG. 10A is a diagram showing a display example of the work history after the user designation, and FIG. 10B is a diagram showing a model image example of the work history determined as the manufacturing requirement feature. In FIG. 10A, as in FIG. 8, the work history determined as the production requirement feature is surrounded by a rounded rectangle.

  By the above-mentioned processing, even if it is a feature that is a manufacturing requirement feature, it is possible to exclude the feature that was used for different applications by the user from the manufacturing requirement feature, so that the extraction accuracy of the manufacturing requirement feature can be further improved. .

  In the processing flow of FIG. 5, after the determination process in step S <b> 2, the rearrangement unit 13 performs a work that is a manufacturing requirement feature based on the setting information of “manufacturing requirements” of the history type data 2 processed by the determination unit 12. History data is extracted (step S3).

  Then, the rearrangement unit 13 moves the extracted work history data after the work order of the remaining work histories of the history data 2 and rearranges the work histories of the history data 2 (step S4).

  FIG. 11 is a diagram illustrating an example of rearranging work histories of history type data. The left side of FIG. 11 represents the history type data 2 before the movement of the work history of the production requirement feature, and the right side of FIG. 11 represents the history type data 2 after the movement of the work history of the production requirement feature. The work history with IDs “02”, “06”, and “07” extracted from the history type data shown on the left side of FIG. 11 is the last work of the work history that has not been extracted, as shown on the right side of FIG. It moves behind the history (ID = 05) in the work order of “02”, “06”, “07”. As a result, the work history recorded in the history type data 2 is “01, 03, 04, 05, 02, 06, 07” when indicated by ID.

  Next, the rearrangement unit 13 moves the work history of the specific manufacturing requirement feature set in advance to the later order with respect to the moved work history (step S5). Here, it is assumed that “fillet” is set as a specific manufacturing requirement feature. The rearrangement unit 13 moves the history data of the work related to the moved “fillet” of ID = 06 to the end of the work order of the history type data 2.

  FIG. 12 is a diagram illustrating an example of rearranging work histories of specific manufacturing requirement features. The left side of FIG. 12 represents the history type data 2 after the movement of the work history of the production requirement feature, and the right side of FIG. 12 represents the history type data 2 after the movement of the work history of the specific production requirement feature.

  The rearrangement unit 13 extracts the work history (ID = 06) corresponding to the command (fillet) of the specific manufacturing requirement feature from the “command” of the working history of the moved manufacturing requirement feature, as shown on the right side of FIG. Then, the data is moved behind the last work data (ID = 07).

  Furthermore, the rearrangement unit 13 re-assigns the ID of the work history (ID = 02, 06, 07) of the moved manufacturing requirement feature to “08, 09, 10”, and sets the base shape of each work as the work history. Reset it based on it.

  FIG. 13 is a diagram illustrating an example of a relationship between parts work history and a model image of each work history based on the history type data 2 shown on the right side of FIG.

  Next, the model display unit 15 generates a three-dimensional shape model of the part based on the history type data 2 in which the work order of the production requirement features is changed and displays it on the display device (step S6).

  The user can confirm the result of replacing the work history of the production requirement feature also from the model image of the part.

  Further, in the process of step S6, the model display unit 15 generates a three-dimensional shape model of each part based on the history type data 2 before and after the movement of the work history of the manufacturing requirement feature, and compares the two models. Then, the display may be switched so that a portion where the base shapes of the models do not match is highlighted.

  FIG. 14 is a diagram illustrating a highlight display example of a portion where the base shape mismatch occurs. The left side of FIG. 14 shows an example of the upper surface of the part based on the history type data 2 before the movement of the work history of the production requirement feature, and the right side of FIG. 14 shows the history type data 2 after the movement of the work history of the production requirement feature. The example of the upper surface of the component based on this is shown. As shown in FIG. 14, when the position of the “vertical wall” is changed due to the movement of the work history of the manufacturing requirement feature and the base shapes of the parts do not match, the part model shown on the right side of FIG. It is displayed in a light so that the user can confirm it.

  Through the above-described processing, the user can confirm or correct the influence of the replacement of the work history of the production requirement feature.

  Next, the data storage unit 16 outputs the history type data 2 to which the work history of the production requirement feature has been moved as processed history type data 3 or stores it in a predetermined data storage unit (step S7).

  FIG. 15 is a diagram illustrating an example of the processed history type data 3.

  The processed history data 3 that has been output or saved can be input to the three-dimensional shape creation support apparatus 1 by the data acquisition unit 11 and reused, similarly to the history data 2. In the processed history data 3, the work history is arranged in the order of determining the base shape and setting the manufacturing requirements. Therefore, when reusing data, it is possible to create a three-dimensional shape by utilizing the characteristics of the history data.

  In particular, in the processed history type data 3, when the feature indicating the manufacturing requirement is used from the viewpoint of design, the information (D) indicating the non-manufacturing requirement is set for the work history. Feature confirmation can be performed more efficiently.

  FIG. 16 is a diagram illustrating an example of a hardware configuration of the three-dimensional shape creation support apparatus 1.

  The three-dimensional shape creation support apparatus 1 can be implemented as a computer 100 shown in FIG. The computer 100 includes, for example, a processing unit (CPU: Central Processing Unit) 101, a memory 102, an input device 103, an output device 104, an external storage device 105, a network connection device 106, a medium driving device 107, and the like. Are connected to the bus 108.

  The CPU 101 controls the entire computer 100. The memory 102 is a RAM (Random Access Memory) or the like that temporarily stores programs and data stored in the external storage device 105 or a portable data storage medium in processing such as program execution and data update. The memory 102 temporarily stores an OS (Operating System) program to be executed by the CPU 101, an application program, and at least a part of various data necessary for processing by the CPU 101.

  The input device 103 is, for example, a keyboard, a mouse, a touch panel, or the like. The output device 104 is a display, for example. The external storage device 105 is, for example, a hard disk device. The external storage device 105 stores programs and data.

  The network connection device 106 is connected to a network such as the Internet and transmits / receives programs and data to / from an external information processing device.

  The medium driving device 107 reads programs and data stored in the portable storage medium. The portable storage medium is a medium such as an FD (flexible disk), a CD-ROM, a DVD, or a magneto-optical disk.

  The CPU 101 of the computer 100 executes various processes including the process shown in the above-described embodiment of the three-dimensional shape creation support apparatus 1 using the program and data read out to the memory 102.

  The data acquisition unit 11, the determination unit 12, the rearrangement unit 13, the model display unit 15, the data storage unit 16, and the like of the 3D shape creation support apparatus 1 can be configured by programs, and these programs are loaded into the memory 102. By being executed by the CPU 101, each function of the three-dimensional shape creation support apparatus 1 is realized. The history data 2 and processed history data 3 of the three-dimensional shape creation support device 1 are stored in the external storage device 105.

  Note that the program and data for realizing each process and function of the three-dimensional shape creation support apparatus 1 do not necessarily need to be stored in the external storage device 105, and the program and data stored in the portable storage medium are It may be read by the medium driving device 107 and stored in the memory 102. Furthermore, the network connection device 106 may acquire the above-described program and data stored in another computer or the like via a network such as a public line, the Internet, a LAN, or a WAN.

  As described above, according to the three-dimensional shape creation support apparatus 1, the base shape is determined regardless of the procedure in which the three-dimensional shape is created in the history type data 2 output from the history type CAD system. Thereafter, the work histories recorded in the history-type data can be rearranged to provide the user with a design procedure for setting manufacturing requirements. For this reason, it is possible to support the realization of a three-dimensional shape creation work utilizing the characteristics of the history-type CAD system.

  Specifically, according to the three-dimensional shape creation support apparatus 1, the work history of manufacturing requirement features recorded in the history type data 2 is gathered after the work procedure. (Manufacturing requirement feature) can be specified in a shorter time than conventional.

  Further, among the work histories stored in the history type data 2, information indicating that it is a non-manufacturing requirement is set for a feature that is a manufacturing requirement even if it is a feature that is used from the viewpoint of design. As a result, manufacturing requirement features can be collected more accurately when data is reused.

  Furthermore, according to the three-dimensional shape creation support device 1, the work history of the manufacturing requirement features recorded in the history type data 2 is collected after the work procedure, so even if the setting of the feature is changed during model correction , The occurrence of manufacturing requirement violations can be suppressed.

  FIG. 17 is a diagram for explaining suppression of manufacturing requirement violations.

  FIG. 17A is a diagram showing an example of a work procedure in the history data 2 when the history data 2 in which the work procedure shown in FIG. 19B is recorded is processed by the three-dimensional shape creation support apparatus 1. FIG. 17B is a diagram illustrating an example of the upper surface of the model when the model of FIG. 19A is corrected using the history type data 2 of FIG.

  In the history type data 2 of FIG. 17A, the procedure 2 which is the work history of the manufacturing requirement feature moves to the end of the work order, determines the base shape of the “boss” (procedure 1), After determining the base shape of the part (Procedure 3), connecting the “boss” and “vertical wall” (Procedure 4), and determining the shape of the entire part, the “boss” The feature “drilling” is set for (Procedure 2).

  When modifying the “vertical wall” of the model shown in FIG. 19A, even if the user changes the parameter of “extrusion” in the procedure 3 of the history type data 2 shown in FIG. Manufacturing requirement features (drilling) are set for the base shape. As a result, as shown in FIG. 17B, it can be seen that the “longitudinal wall” whose thickness has been increased does not interfere with the screw hole and does not violate manufacturing requirements.

  As described above, according to the three-dimensional shape creation support apparatus 1 disclosed as one aspect of the present invention, in the three-dimensional shape creation work based on history data, it is easy to specify the work history related to the production requirement feature, and the production requirement is violated. It is possible to provide history-type data that is less likely to occur, improve the work efficiency of creating a three-dimensional shape, and suppress the increase in work man-hours.

  As described above, the three-dimensional shape creation support apparatus 1 disclosed as one aspect of the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the gist of the present invention. Of course, changes may be made.

DESCRIPTION OF SYMBOLS 1 3D shape creation assistance apparatus 11 Data acquisition part 12 Judgment part 13 Rearrangement part 15 Model display part 16 Data storage part 2 History type data 3 Processed history type data

Claims (11)

Computer
Determine whether each work feature corresponds to a manufacturing requirement feature from historical data in which multiple features representing the 3D shape of the model are recorded in the order of work,
Move the work order of the features determined to be manufacturing requirement features after the work order of the other features in the historical data while maintaining the work order between the features determined to be manufacturing requirement features A three-dimensional shape creation support program characterized in that the processing to be executed is executed. 2. The three-dimensional shape creation support program according to claim 1, wherein in the process of determining whether the feature corresponds to the manufacturing requirement feature, the determination is made using a command recorded in each work of the history type data. The three-dimensional shape creation support program according to claim 1 or 2, wherein the manufacturing requirement feature is a drilling, fillet, or drafting operation. In the process of extracting the manufacturing requirement feature corresponding to the drilling operation from the history data, the hole diameter set in the drilling operation recorded in the history data is a pre-registered tool size for drilling The three-dimensional shape creation support program according to claim 3, wherein a matching feature is determined as the manufacturing requirement feature. The three-dimensional shape creation support program according to claim 1, wherein a feature to which information indicating that it is a production requirement is given from the feature of each work of the history data is determined as the production requirement feature. The three-dimensional shape according to claim 1 or 5, wherein a feature to which information indicating a non-manufacturing requirement is added from a feature of each operation of the history data is not determined as the manufacturing requirement feature. Creation support program. The three-dimensional shape creation support program according to claim 1, wherein a feature selected as a production requirement by a user operation from the history data is determined as the production requirement feature. In the process of moving the work order of the feature determined to correspond to the manufacturing requirement feature, the feature determined to correspond to the manufacturing requirement feature specified in advance is used as the work order of the manufacturing requirement feature in the history type data. The three-dimensional shape creation support program according to any one of claims 1 to 7, wherein the three-dimensional shape creation support program is moved so as to be located after the work order of the remaining manufacturing requirement features. In the computer,
Based on the history type data before and after the movement of the feature determined to correspond to the manufacturing requirement feature before and after the movement, a model showing a three-dimensional shape before the movement and a three-dimensional shape after the movement are created, respectively. The two models are compared, and when the base shapes of the corresponding parts of the two models do not match, a process of highlighting the mismatched parts is executed. The three-dimensional shape creation support program according to claim 8. A processing method executed by a computer,
The computer is
Determine whether each work feature corresponds to a manufacturing requirement feature from historical data in which multiple features representing the 3D shape of the model are recorded in the order of work,
Move the work order of the features determined to be manufacturing requirement features after the work order of the other features in the historical data while maintaining the work order between the features determined to be manufacturing requirement features A three-dimensional shape creation support method characterized by executing a process to perform. A processing unit for determining whether or not each work feature corresponds to a manufacturing requirement feature from history type data in which a plurality of work sets indicating a three-dimensional shape of the model are recorded in the work order;
Move the work order of the features determined to be manufacturing requirement features after the work order of the other features in the historical data while maintaining the work order between the features determined to be manufacturing requirement features A three-dimensional shape creation support device.

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