JPH1153017A - Graphic generation device for CAM and recording medium - Google Patents

Abstract

(57) [PROBLEMS] To provide an assembly drawing CA with minimum operation.
The D data is converted into CAM data decomposed into a single part. SOLUTION: An assembly drawing-shaped CAD including a plurality of parts is provided.
Decompose data into single part data for CAM
In the AM graphic generating apparatus, an intersection calculating means (13) for calculating an intersection of any two graphic elements, and an element dividing means (13) for dividing the graphic element at the intersection calculated by the intersection calculating means. An apparatus for generating a CAM graphic capable of automatically executing intersection decomposition processing of graphic elements when generating a CAM graphic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAM graphic generating apparatus and a recording medium for converting CAD data to generate a CAM graphic.

[0002]

2. Description of the Related Art In recent years, in the field of machining (cutting, sheet metal working, etc.), NC machines for machining are based on graphic data created by CAD (computer-aided design) devices.
It is common to create data (CAM data) and manufacture machined products by CAM (Computer Assisted Manufacturing).

When NC data for machining is created by such a CAD / CAM system, it is necessary to transfer graphic data from the CAD device to the CAM device.
At this time, conventionally, CAD data of an assembly drawing shape of a product is decomposed into graphic data units of a single component shape required by a CAM device, and only one component is extracted.

However, the CAD data of the assembly drawing shape is
It is rare to draw elements by dividing them for each part, and it is common to draw one element at the joint between parts and one element at a time General.

In order to extract a single component in such a case, in a conventional CAD / CAM system, the CAD data is disassembled by the following method and the data is connected to the CAM system.

(1) First, an assembly drawing CAD is created in a CAD apparatus.
Read and display data. (2) Next, the operator individually selects an element group constituting an arbitrary single part, and deletes elements other than the selected element.

(3) Next, the operator can use a CAD device to perform a "trimming" function on a part in which an element that is combined with an element of an adjacent other part and protrudes at one corner of the part. Use the (protruding part removal function) to delete manually.

(4) Next, the operator saves the remaining elements under a different name. By repeating the above operation for the number of parts, CAD data decomposed into parts for each single part
Input to the AM device.

[0009]

In the conventional method, CA operation is performed by the above-described four-step manual operation.
D parts need to be disassembled. Therefore, it takes a lot of time to process a drawing having a large number of parts and a complicated drawing having a large number of elements, even though the simple operation on the CAD apparatus is repeated.

In particular, when a single component element is selected, it is necessary to pick the elements for the number of elements, and when trimming, it is necessary to select an element to be trimmed at one protruding portion and to select an element to be trimmed. One pick operation is required. In particular, the element designating operation is frequently performed, and thus the labor burden on the operator becomes large, and an error such as a designation mistake easily occurs.

Therefore, a series of these operations are automatically performed by CAD with only a minimum necessary element designating operation.
There is a need for a system that can disassemble parts and thereby automate the extraction of a single part from CAD data in an assembly drawing by a CAM system.

The present invention has been made in view of such circumstances, and a CAM for converting assembly drawing CAD data into CAM data decomposed into a single part with minimum operations.
It is an object of the present invention to provide a graphic generating device for use and a recording medium.

[0013]

In order to solve the above-mentioned problems, the invention according to claim 1 decomposes CAD data of an assembly drawing shape composed of a plurality of parts into data of a single part unit for CAM. The CAM graphic generating apparatus includes an intersection calculating means for calculating an intersection of any two graphic elements, and an element dividing means for dividing the graphic element at the intersection calculated by the intersection calculating means. This is a CAM graphic generation device that can automatically execute intersection decomposition processing of graphic elements upon generation.

In the present invention, since such means are provided,
In the intersection decomposition processing of the graphic element, the intersection decomposition processing for trimming an unnecessary portion of the graphic element can be automatically performed.

According to a second aspect of the present invention, there is provided a CAM graphic generating apparatus for decomposing CAD data of an assembly drawing shape composed of a plurality of parts into data of a single part unit for a CAM. Area multiplying element extraction means for extracting a graphic element in a specified part area and a graphic element straddling the boundary of the part area for an arbitrary single part, and using the extracted graphic elements at intersections of the elements Intersection decomposing means, each of which is a new graphic element, and an in-area element extracting means for extracting only the graphic element in the part area from among the decomposed new graphic elements. This is a CAM graphic generation apparatus capable of executing automatic trimming of graphic elements constituting a single part upon generation.

According to the present invention, such means are provided.
When generating a CAM graphic, automatic trimming of graphic elements constituting a single component can be performed.

According to a third aspect of the present invention, in the invention according to the second aspect, each of the divided graphic elements is connected to each other by means of the intersection decomposing means. Line connection means, and, when an end point of a graphic element is present on another graphic element, if the graphic element is connected at this end point, the graphic having the largest area and a closed graphic When a figure other than the figure is not included in the closed figure having the maximum area, there is provided unnecessary element deleting means for deleting a graphic element constituting the non-included figure as an unnecessary element. This is a CAM graphic generation device capable of automatically extracting each graphic element constituting a single part.

The present invention provides such means,
In generating a CAM graphic, automatic extraction of each graphic element constituting a single part can be performed. Further, in the invention corresponding to claim 4, in the invention corresponding to claim 3, the unnecessary element is deleted by the unnecessary element deleting means, and thus the graphic element is finally extracted as a graphic element constituting a certain single part. Attribute adding means for adding an attribute for enabling identification between single parts to all graphic elements. When generating a CAM graphic, automatically decompose CAD data into single parts. Executable CAM
This is a graphic generation device.

Since the present invention is provided with such means,
In generating a CAM graphic, automatic disassembly of CAD data into a single part can be performed. According to a fifth aspect of the present invention, there is provided a recording apparatus for recording a program for causing a computer to execute a CAM graphic generation process for decomposing CAD data of an assembly drawing shape composed of a plurality of parts into data of a single part for CAM. In the medium, the program is a computer-readable recording medium having: an intersection calculation process of calculating an intersection of any two graphic elements; and an element division process of dividing the graphic element at the intersection calculated by the intersection calculation. It is.

The present invention provides such means,
The computer that reads this program has the same operation and effect as the CAM graphic generating apparatus according to the first aspect of the present invention.

According to a sixth aspect of the present invention, there is provided a program for causing a computer to execute a CAM graphic generation process for decomposing CAD data of an assembly drawing shape composed of a plurality of parts into single-unit data for CAM. In the recorded recording medium, the program includes an area multiplying element extraction process for extracting a graphic element in a specified component area and a graphic element straddling a boundary of the component area from among the assembled graphics, The extracted graphic elements are divided at intersections of the respective elements, and intersection decomposition processing is performed with each of them as a new graphic element, and among the new graphic elements after the decomposition, only the graphic elements in the component area are extracted. And a computer-readable recording medium having an in-area element extraction process.

According to the present invention, such means are provided.
The computer that reads this program has the same functions and effects as the CAM graphic generating apparatus according to the second aspect of the present invention.

[0023]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram illustrating an example of a CAM graphic generation apparatus according to an embodiment of the present invention.

The present apparatus is realized by a computer which reads a program recorded on a recording medium such as a magnetic disk and the operation of which is controlled by the program.

The CAM graphic generating apparatus decomposes the CAD data D1 into single parts and adds an attribute that can be identified in parts by simply designating a rectangular area including a part with respect to the CAD data D1. CAM data. Here, the CAD data D1 stored in the CAD data file storage device is graphic data in an assembly drawing format including a plurality of parts. The CAM data D2 stored in the CAM data file storage device 3 is
This is graphic data decomposed into parts for AM.

The CAM graphic generating apparatus is provided in a computer for operating the CAD apparatus or the CAM apparatus in terms of hardware, and as shown in FIG. , A CAD data file storage device 2 and a CAM data file storage device 3, and other peripheral devices such as an input device and a display device (not shown) are connected.

Further, functionally, the CAM graphic generating apparatus includes a CAD part disassembling apparatus 4, a CAD part extracting apparatus 5, and a CAD part automatic trimming apparatus 6. That is, in the CAM graphic generating apparatus main body 1, the data input / display processing section 7 reads out the CAD data from the CAD data file storage device 2 and reads the CAD data.
The output from the CAD parts disassembly device 4 is stored in the CAM data file storage device 3 by the data output processing unit 8 as CAM data.

The above components will be described in more detail. First, the CAD parts disassembly apparatus 4 comprises a CAD parts extraction apparatus 5 and an attribute addition processing section 9. The CAD parts extraction apparatus 5 is a CAD parts automatic trimming apparatus 6 And an unnecessary element deletion processing unit 10.

Further, a CAD part automatic trimming device 6
Is a component designation processing unit 11 and an area multiplication element extraction unit 12
, Intersection decomposition processing unit 13 and in-region element extraction processing unit 14
And a break line connection processing unit 15.

The CAD parts disassembly device 4 disassembles CAD data into single parts and converts them into CAM data to which an attribute that can be identified for each part is added. CAD parts extraction device 5
Extracts only graphic elements of a single part from CAD data.

The CAD component automatic trimming device 6 trims only the graphic elements covering the specified rectangular area, so that only the graphic elements in the rectangular area can be extracted. The data input / display processing unit 7 includes the CAD data file storage device 2
Thus, the CAD data D1 is read and displayed on a display device (not shown).

When the operator designates a rectangular area with a pointing device such as a mouse so as to include an arbitrary single part with respect to the figure displayed on the screen by the data input display processing section 7, At this time, the starting point and the ending point of the diagonal two corners of the rectangular area are held in the memory.

The area-hung element extracting unit 12 applies a CA to the graphic element displayed on the screen by the data input / display processing unit 7.
Using "area multiplication selection" which is a standard function of D, a graphic element in a rectangular area indicated by a start point and an end point held by the component specification processing unit 11 is extracted.

The intersection decomposing unit 13 disassembles the extracted graphic elements separately at the intersections of the elements. The in-area element extraction processing unit 14 uses the CAD standard function “select in area” for the graphic element decomposed by the intersection decomposing processing unit 13 and expresses the graphic element with the start point and end point held by the component specification processing unit 11. Only the graphic elements in the rectangular area including the entire element part in the rectangular area are extracted.

The break line connection processing unit 15 connects the graphic elements extracted by the in-region element extraction processing unit 14 at the intersections by the processing unit 9 into one graphic and repairs them. That is, the break line connection processing unit 15
Is configured to automatically connect and correct "fragment elements" on CAD drawings such as element breaks and overlaps. In other words, two adjacent elements separated from each other outside the allowable error range are connected on a single straight line or connected on the same circumference between arcs to form a single fragment by connecting them. Automatically corrects elements "(partial cuts in straight lines, partial cuts in arcs).

The unnecessary element deletion processing unit 10 replaces the graphic elements connected by the intermittent line connection processing unit 15 with the elements other than the designated part (the graphic elements other than the closed shape and the inner rectangular shape of the closed shape graphic) in the rectangular area. Non-maximum shape elements)
Only the graphic element of the specified part (the graphic element with the largest rectangular area) is extracted. In other words, the unnecessary element deletion processing unit 10 performs the CAD drawing of the element outside the surface or the single element inside the surface with respect to the figure in which a plurality of closed shapes are created by the processing of the above units. It is configured to automatically delete the "leave-off element". That is, elements other than the closed shape (including a single element) remaining as a result of the above-described processing are deleted, and the closed shape element outside the plane having the maximum rectangular area and the interfering closed By deleting the shape (the element that intersects or touches the surface), the “unremoved element” is automatically deleted.

The attribute addition processing section 9 adds a unique attribute such as a layer to the graphic element extracted by the in-region element extraction processing section 14 so that these elements can be identified as one component. Further, the attribute addition processing unit 9 hands over the processing to the data input / display processing unit 7, and enables the execution of the repetitive processing for the original CAD data. As a result, it is possible to convert all parts of the CAD data D1 into CAM data D2 (graphic data decomposed into single parts and to which an attribute that can be identified for each part is added).

The data output processing section 8 outputs the CAD data D1
CA converted by the previous process for each part
CA is used so that the M data D2 can be used in the CAM system.
Output to the M data file storage device 3.

Next, the operation of the CAM graphic generating apparatus according to the embodiment of the present invention configured as described above will be described. In the description of the operation, first, an overall flow will be described with reference to FIGS. Next, a CAD part disassembly method, a CAD part extraction method, and a C
The AD part automatic trimming method will be described with reference to FIGS. 3, 4, and 5, respectively. Further, after that, the operation of each processing unit, that is, the broken line connection processing unit 15, the unnecessary element deletion processing unit 10, and the intersection decomposition processing unit 13 are shown in FIG.
This will be described in detail with reference to FIGS. (Overall Operation) FIG. 2 is a diagram for explaining the overall operation of the CAM graphic generating apparatus according to the present embodiment.

First, CAD data for an assembly drawing composed of a plurality of parts is read from a file by the data input / display processing section 7 and displayed on the screen (FIG. 2A). At this stage, a portion surrounded by a dotted line in the figure is, for example, a part shown in FIG.
It is drawn with two lines like. Note that, in FIG. 2, the distances between the intersections are shown to indicate the belonging relationship of each line, and the actual coordinate positions are not separated unless otherwise specified.

Next, in accordance with the operator's instruction, the component designating section 11 instructs a rectangular area by a pointing device such as a mouse so as to include an arbitrary single component from the assembly drawing CAD data (FIG. 2). (B)). In the figure, an area instruction is given for one of the components included in the illustrated assembly drawing.

Next, a graphic element based on the specified rectangular area is selected by the area multiplying element extraction processing section 12. In this selection, a graphic element included in the rectangular area and a graphic element covering the rectangular area are extracted (FIG. 2).
(C)).

Next, the intersection decomposition processing section 13 selects any two graphic elements from the extracted graphic elements,
If there is an intersection (including a case where the end point of one graphic element is in contact with the other graphic element), the two graphic elements are divided at the intersection. By performing this process for all the combinations of two graphic elements, the extracted graphic elements are disassembled at all intersections. In other words, this processing always separates each graphic element into a separate graphic element at the intersection position. This is schematically shown in FIG. 2 (FIG. 2D).

Next, the in-region element extraction processing unit 14
A graphic element is selected again using the same rectangular area specified by the component specification processing unit 11 for the extracted graphic element. At this time, only the graphic element included in the rectangular area is selected, and therefore, the graphic element covering the rectangular area is deleted (FIG. 2E).

By the above-described processing, only the graphic elements overlapping the designated rectangular area are trimmed with reference to the graphic elements intersecting the outermost part in the rectangular area, and only the graphic elements included in the rectangular area are extracted. Will be.

However, in this state, the graphic elements included in the rectangular area are still separated at the intersections of the elements in the area. This is not a problem in the appearance of graphics, but is not convenient for use as component data for CAM.

For example, when processing is performed by a laser processing machine, the laser processing machine performs one process for each element.
Therefore, the portion where the laser processing is continued should be one element. For example, if linear processing is composed of two elements, the laser processing machine stops processing and returns to the reference position once for each processing of one element. Black spots are formed, resulting in poor quality as a processed product. In addition, in the case of a turret punch press, for example, in the case of a turret punch press, there is a possibility that a separate die is used, and the efficiency is poor.

As another problem, it is conceivable that during the component designation process, no matter how the component is surrounded, a rectangular area may include a graphic element of another component smaller than the rectangular area of the required component (for example, FIG. 2). Unnecessary element products shown in (a) to (e)), and if left unchecked, these unnecessary elements will be extracted together.

Therefore, the CAD data clean-up processing using the discontinuous line connection processing unit 15 and the unnecessary element deletion processing unit 10 is performed. In the CAD data clear copy processing, first, the break lines are connected by the break line connection processing unit 15, and then, the unnecessary element deletion processing unit 10 performs processing other than the elements included in the closed shape figure having the maximum area in the rectangular area. The graphic element (that is, a closed shape graphic of another part or a graphic element other than the closed shape) is deleted as an unnecessary element (FIG. 2 (f)).

By the processing so far, only the graphic elements of the necessary parts in the designated area are extracted. Next, the attribute addition processing unit 9 adds an attribute by layer designation or the like to each of the graphic elements constituting the extracted component so that each graphic element can be identified as belonging to the component. In the figure, the component designated as the rectangular area in FIG. 2B has an attribute P1 added thereto (FIG. 2).
(G)).

As described above, of the assembly drawing CAD data,
CAM data for one component was created. However, in order to assemble an actual product consisting of parts, all parts included in the assembly drawing CAD data are necessary, and therefore, CAM data for all parts must be created. Then, the process is transferred from the attribute addition processing unit 9 to the data input / display processing unit 7, and again the same assembly drawing CA
The D data is read, and the above-described processing is repeated for the next different component.

In this way, finally, the graphic data for each part is generated (FIG. 2 (h)). The graphic data (CAM data D2) in component units shown in FIG. 2 (h) has the same appearance as the graphic data (CAD data D1) in assembly drawing format shown in FIG. It is disassembled and converted into graphic data to which attributes P1 and P2 that can be identified for each component are added.

Finally, the converted CAD data is output as a CAM data D2 to the CAM data file storage device 3 by the data output processing section 8 as a file. Next, processing of each unit will be described. (CAD Component Disassembly Processing) FIG. 3 is a flowchart for explaining the CAD component disassembly method of this embodiment.

First, a reference value of the attribute information is set (S
T11). Here, since the attribute is specified by the layer, first, the layer No. It is set to 1. Next, CAD components are extracted (ST12). The specific contents of the component extraction method will be described later with reference to FIG.

Next, it is determined whether or not all the components in the CAD data D1 have already been extracted. If the extraction has been completed, the process ends. If the extraction has not been completed, the process proceeds to the next step (ST13). . If all the components have been extracted, the state is as shown in FIG. 2H, for example.

If not all components have been extracted, all graphic elements of the CAD component for which component extraction has been completed in step ST12 are read from the memory and displayed on the screen (ST14, FIG. 2 (f)). .

Next, the same component attribute is added to all the graphic elements displayed on the screen (ST15, FIG. 2).
(G)). Next, the component data with this attribute is
The data is written to the CAM data file as M data (ST16).

Next, the layer No. Is incremented, and the process returns to step ST12 (ST17). Note that CA
The CAM data creation process is performed for all the components in the D data D1, and if the component attributes are added to each component, the entire process ends from step ST13. (CAD Component Extraction Processing) FIG. 4 is a flowchart illustrating a CAD component extraction method according to the present embodiment.

This processing is the processing of step ST12 in FIG. First, CAD component automatic trimming is performed by the CAD component automatic trimming device 6 (ST21).
The specific contents of the CAD component automatic trimming method will be described later with reference to FIG.

Next, all the graphic elements as a result of the trimming are read from the memory and displayed on the screen (ST22). By this processing, for example, an unnecessary element has not been deleted in FIG.

Next, unnecessary elements are deleted, and a state similar to that of FIG. 2F is obtained (ST23). The unnecessary element deletion processing will be described later with reference to FIG. Then, all the graphic elements on the screen after the unnecessary element is deleted are written out to the memory (ST24), and the process proceeds to step ST13 in FIG. (CAD Part Automatic Trimming Process) FIG. 5 is a flowchart for explaining the CAD part automatic trimming method of the present embodiment.

This process is the process of step ST21 in FIG. First, the CAD data D1 of the CAD data file is read and displayed on the screen (ST31, FIG. 2).
(A)).

Next, parts are designated using a pointing device such as a mouse (ST32, FIG. 2).
(B)) At this time, the coordinates of the start point and the end point of the specified rectangular area are held (ST33, FIG. 2B).

Next, the graphic elements in the rectangular area and the graphic elements related thereto are extracted (ST34, FIG. 2 (c)), and the CAD part intersections are further decomposed (ST35, FIG. 2 (d)). The intersection decomposition processing will be described later with reference to FIG.

Next, a graphic element only in the rectangular area is extracted (ST36, FIG. 2 (e)), and a break line connection process is performed (ST37, FIG. 2 (f)). The break line connection process will be described later with reference to FIG.

Then, all graphic elements on the screen after the break line connection processing are written out to the memory (ST38), and thereafter, the process proceeds to step ST22 in FIG. FIG. 6 is a flowchart for explaining the break line connection processing of this embodiment.

In this process, two elements adjacent to each other that are outside the allowable error range are automatically connected to each other if the two straight lines are on the same straight line or if two adjacent arcs are on the same circumference. After the conversion, the two graphic elements in the memory are deleted and replaced with the converted graphic elements.

In FIG. 6, first, the first element is fetched from the memory and set in element A (ST41).
At this time, if there is no element to be fetched in the memory, the process ends;

The next element is fetched from the memory and the element B
Is set to (ST43). At this time, if there is no element to be taken out in the memory, the process ends, and if there is, the process proceeds to the next step (ST44).

Next, it is checked whether the element A and the element B are on the same straight line (ST45). If both elements are not on the same straight line, the process returns to step ST41 (ST4).
6). On the other hand, when both elements are on the same straight line, the process proceeds to the next step (ST46).

When both elements A and B are on the same straight line, an element C having the start point of element A and the end point of element B as end points is created (ST47). Note that the element C is data in the storage element of the CAD data conversion device 3 like the elements A and B.

Next, each element in the memory corresponding to the element A and the element B is deleted from the memory (ST48), and the connected flag is set for the element C (ST49). Further, the element C
Are added to the memory in place of the elements corresponding to the elements A and B (ST50). Therefore, when two elements that were originally in the memory are connected, a new connected element is stored in the memory instead of the two elements.

Then, the element C is substituted for the element A (S
T51). After the element A is updated in this way, the process returns to step ST43, and the next element in the memory is set as the element B, and the determination of the break line processing is performed on the new elements A and B
The processing is performed as described above.

Then, the above determination and processing are performed for all the elements in the memory, so that the break line processing is executed. Although the above processing deals only with a case where two consecutive elements are interrupted, for example, a case where two consecutive elements partially or entirely overlap on the same straight line may be considered. Such a case can be dealt with by the processing shown in FIG.

In other words, even if there is such an overlap, if the overlap is on the same straight line, it is replaced by a new element connecting the start point and the end point of the two elements if the overlap is on the same straight line (ST47). ~ ST5
1) The overlapping part of the elements is eliminated.

That is, the break line connection processing unit 6 eliminates not only breaks in continuous elements but also overlaps. (Unnecessary Element Deletion Processing) FIG. 7 is a flowchart for explaining the unnecessary element deletion processing of this embodiment.

In this processing, graphic elements written in the memory after the intermittent line connection processing are deleted from elements other than the closed shape (including single elements) by a procedure as shown in FIG. A closed-shape element outside the holding surface and a closed-shape element that exists in the surface but interferes (an element that intersects or touches the surface) are deleted from the memory. By this processing, unnecessary graphic elements are deleted as shown in FIG.

Before starting the processing shown in FIG. 7, data for unnecessary element deletion processing is created in the memory. That is, if one end point of any two graphic elements is a coordinate on the other graphic element, setting information indicating that the two graphic elements are in a connection relationship is stored in the memory. This process is performed for all combinations of graphic elements. In this way, the setting information indicating that all the elements constituting the closed shape are connected is stored in the memory.

After such preparation, in FIG.
First, the first element is read from the memory and stored in the stack (ST61). At this time, if there is no element to be fetched in the memory, the process proceeds to step ST69, and if so, the process proceeds to the next step (ST62).

Next, the memory is searched for whether there is a next element connected to the end point of the last element stored in the stack based on the setting information (ST6).
3). At this time, if the element to be connected exists in the memory (ST64), this is stored in the stack (ST6).
5) If there is no element to be connected (ST64), the series of elements has an open shape like a simple line segment, so the element in the memory corresponding to the element stored in the stack is deleted, and The process returns to ST61 (ST66).

When the process proceeds to step ST65, it is further determined whether or not the element stored in the stack has a closed shape using the setting information (ST66). If a closed shape of one element is obtained, step ST64 is followed by step ST64.
Without going to step 66, the process goes to step ST68 by this step.

If the element stored in the stack is not a closed shape in step ST67, the process returns to step ST63. If the element is a closed shape, the closed shape consisting of a series of elements stored in the stack is stored in the closed shape storage area. S
The process returns to T61 (ST68).

When all elements have been read from the memory in this way, the process proceeds to step ST69. Next, a closed shape having the largest area is selected as the largest rectangular region from the fully closed shapes stored in the closed shape storage area (ST).
69).

Then, each closed shape stored in the closed shape storage area is compared with the maximum rectangular area, and an interference check is performed. That is, for the closed shape outside the maximum rectangular area and the interference closed shape partially overlapping the maximum rectangular area, the element in the memory corresponding to the closed shape is deleted to delete the closed shape (ST70). . (Intersection Decomposition Processing) FIG. 8 is a flowchart for explaining the intersection decomposition processing of the present embodiment.

First, all graphic elements on the screen are set in an array (ST71). Next, the number of read elements is set in a variable MAXSCH (ST72). Initial values of I and J which are arguments of the array are set (ST73),
The argument I is incremented (ST74).

If the argument I is greater than the number of elements minus one, the process ends. If the argument I is smaller, the process proceeds to the next step to continue the intersection decomposing process (ST75). The argument J is incremented (S
T76) If the argument J becomes larger than the number of elements, step S
Returning to T74, if smaller, proceed to the next step (ST7).
7).

Subsequently, intersection decomposition processing is performed on each of the two elements. First, the intersection of the element I and the element J is obtained (ST78). If the two have no intersection and are parallel, the process returns to step ST76 and proceeds to the processing for the next element J (ST78).
79).

On the other hand, if there is an intersection (ST79), it is checked whether or not the intersection is on any element. If it is not on the element, the process returns to step ST76, and if it is on the element, the process proceeds to the next step (ST79). ST80).

Next, when the obtained intersection does not coincide with the end point of the element I (ST81), the element I is divided at the intersection and displayed on the screen (ST82), and the original element I is It is erased (ST83).

Next, when the obtained intersection point coincides with the end point of the element I (ST81), or after the end of step ST83, the process proceeds to step ST84. In step ST84, it is determined whether or not the obtained intersection point matches an end point of the element J. If not (ST84), the element J is divided at the intersection point and displayed on the screen (S84).
T85), the original element J is erased (ST86).

If the obtained intersection point matches the end point of element J (ST84), or step ST86
After the end, the process returns to step ST76 and is incremented. By repeating the above processing, intersection decomposition is performed at all intersections. The elements to be subjected to the intersection decomposition are not limited to straight lines, but may be elements having various shapes such as arcs.

As described above, the CAM graphic generating apparatus according to the embodiment of the present invention comprises a component designation processing unit 11, an area multiplication element extraction unit 12, an intersection decomposition processing unit 13, an in-area element extraction processing Unit 14, a break line connection processing unit 15,
Since the unnecessary element deletion processing unit 10 and the attribute addition processing unit 9 are provided, the assembly drawing is decomposed into single component data only by designating a rectangular area including a component with respect to the assembly drawing CAD data. CA with an attribute that can be identified for each component
It can be converted to M data.

Therefore, it is possible to generate CAM data decomposed into a single part from the assembly drawing CAD data with the minimum operation. That is, on the CAM system side, it is possible to automate the extraction of a single component from the assembly drawing CAD data only by specifying the added component attribute.

The present invention is not limited to the above embodiments, but can be variously modified without departing from the scope of the invention. For example, first, in the present embodiment, the entire CAM graphic generating apparatus has been described.
By directly combining the CAD data file storage device 2, the CAM data file storage device 3, the data input display processing unit 7, and the data output processing unit 8 with the D component extraction device 5, the CAD component extraction device alone It is also possible to use as. According to the CAD part extracting apparatus, when generating a CAM graphic, it is possible to automatically extract each graphic element constituting a single part.

Similarly, CAD parts automatic trimming device 3
For the CAD data file storage device 2 and the CA
By directly combining the M data file storage device 3, the data input / display processing unit 7, and the data output processing unit 8, it can be used as a CAD component automatic trimming device alone. According to the CAD component automatic trimming apparatus, when generating a CAM graphic, it is possible to automatically trim a graphic element constituting a single part.

The method described in the embodiment can be executed by a computer as a program such as a magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a storage medium such as a semiconductor memory. And can also be transmitted and distributed via a communication medium. A computer that implements the present apparatus reads a program recorded in a storage medium, and executes the above-described processing by controlling the operation of the program.

[0097]

As described above in detail, according to the present invention, it is possible to provide a CAM graphic generating apparatus and a recording medium for converting assembly drawing CAD data into CAM data decomposed into a single part with a minimum operation. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a CAM graphic generation apparatus according to an embodiment of the present invention.

FIG. 2 is an exemplary view for explaining the overall operation of the CAM graphic generation apparatus according to the embodiment;

FIG. 3 is a flowchart illustrating a CAD component disassembly method of the embodiment.

FIG. 4 is a flowchart illustrating a CAD part extraction method according to the embodiment.

FIG. 5 is a flowchart illustrating a CAD component automatic trimming method according to the embodiment;

FIG. 6 is a flowchart for explaining a break line connection process according to the embodiment;

FIG. 7 is an exemplary flowchart for explaining unnecessary element deletion processing according to the embodiment;

FIG. 8 is a flowchart for explaining intersection decomposition processing according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CAM figure generation apparatus main body 2 ... CAD data file storage apparatus 3 ... CAM data file storage apparatus 4 ... CAD parts disassembly apparatus 5 ... CAD parts extraction apparatus 6 ... CAD parts automatic trimming apparatus 7 ... Data input display processing part 8 ... Data output processing unit 9 ... Attribute addition processing unit 10 ... Unnecessary element deletion processing unit 11 ... Part designation processing unit 12 ... Area multiplication element extraction processing unit 13 ... Intersection decomposition processing unit 14 ... Intra-region element extraction processing unit 15 ... Disconnected line connection Processing unit

Claims (6)

[Claims] 1. An assembly drawing-shaped CAD comprising a plurality of parts.
Decompose data into single part data for CAM
An AM graphic generating apparatus, comprising: an intersection calculating means for calculating an intersection of any two graphic elements; and an element dividing means for dividing the graphic element at the intersection calculated by the intersection calculating means. C
AM graphic generator. 2. An assembly drawing-shaped CAD comprising a plurality of parts.
Decompose data into single part data for CAM
In the AM graphic generating apparatus, an area multiplying element extracting means for extracting a graphic element in a specified component area and a graphic element straddling a boundary of the component area from among the assembled graphics, An intersection decomposing unit that divides each of the extracted graphic elements at intersections of the respective elements and sets each of the extracted graphic elements as a new graphic element, and among the decomposed new graphic elements, only the graphic elements in the component area. A CAM graphic generating apparatus comprising: an in-area element extracting means for extracting. 3. An interline decomposing means, for each graphic element divided by connecting graphic elements formed on a continuous line, a line connecting means, and an end point of the graphic element exists on another graphic element. At this time, if the graphic elements are connected at this end point, a graphic other than the graphic having the maximum area and being the closed graphic is not included in the closed graphic having the maximum area. 3. The CAM graphic generating apparatus according to claim 2, further comprising: unnecessary element deleting means for deleting a graphic element constituting the graphic not included as an unnecessary element. 4. An unnecessary element is deleted by said unnecessary element deleting means, so that all of the graphic elements finally extracted as graphic elements constituting a certain single part can be identified between said single parts. 4. The CAM according to claim 3, further comprising attribute adding means for adding an attribute for enabling the CAM.
Figure generation device. 5. An assembly drawing CAD having a plurality of parts.
Decompose data into single part data for CAM
In a recording medium storing a program for causing a computer to execute an AM graphic generation process, the program includes: an intersection calculation process of calculating an intersection of any two graphic elements; and an intersection calculated by the intersection calculation process. A computer-readable recording medium having an element division process for dividing a graphic element. 6. A CAD of an assembly drawing shape composed of a plurality of parts.
Decompose data into single part data for CAM
In a recording medium recording a program for causing a computer to execute an AM graphic generation process, the program includes: a graphic element in a component area designated for an arbitrary single component from the assembled graphics; and a boundary between the component areas. An area multiplying element extraction process for extracting straddling graphic elements, an intersection decomposing process in which each of the extracted graphic elements is divided at intersections of the respective elements and each of them is a new graphic element, A computer-readable recording medium, comprising: an in-area element extraction process of extracting only graphic elements in the component area from among various graphic elements.