JPH07239866A - Device and method for preparing disassembly/assembly drawing - Google Patents

Abstract

PURPOSE:To provide a device and method for preparing disassembly/assembly drawing with which the disassembly/assembly drawing of an assembled composite object composed of plural parts can be easily prepared. CONSTITUTION:This device is provided with an input part 101, shape data memory 105 for storing the shape data of parts consisting of the assembled object, memory 106 for storing assembly process data composed of assembling parts and assembling directions, arithmetic part 102 for displaying the assembled object on a display part based on the shape data, and means 109 for deciding the arranging positions of disassembling parts constituting the assembled object based on the assembly process data and the shape data, and the disassembly/ assembly drawing is displayed on the display part corresponding to the decided arranging positions. Thus, the disassembly/assembly drawing can be automatically prepared, and man-hour for preparing the disassembly/assembly drawing can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a device for preparing an exploded assembly drawing, which is created when showing the structure of an assembly composed of a plurality of parts, the assembly procedure in the manufacturing process, the maintenance inspection and the repair procedure. And about the method.

[0002]

2. Description of the Related Art An exploded view is a drawing in which individual parts are separated from a state in which the parts are combined and are arranged in an assembly order in a direction opposite to the assembling direction. Such an exploded view is used when showing a configuration of an assembly including a plurality of parts, an assembly procedure in a manufacturing process, a maintenance inspection and a repair procedure, and the like. Conventionally, an exploded assembly drawing has been created by handwriting based on an assembly procedure manual showing assembly drawings of products, manufacturing drawings such as parts drawings, and assembly procedures. Further, in recent years, a CAD system has been used for product design, an assembly model of a product created using a three-dimensional CAD system is created, and a user considers an assembly procedure based on the data created by this three-dimensional CAD system. An exploded view is created by moving a part by a move command.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
It took a lot of time because I had to manually create an exploded view. Further, if the shape data of the assembly created by the three-dimensional CAD system is used, it is not necessary to write at least the shape of the part, but the operator moves each part by instructing the moving direction and the moving amount. Took a lot of time. In addition, at the stage of considering the assembly procedure in the manufacturing preparation stage, it is necessary to confirm whether or not the assembly procedure is correct by checking the shape. However, the determination of the assembly procedure involves trial and error, and there is a problem that it takes a lot of man-hours because the exploded assembly drawing is manually recreated every time the procedure is changed.

It is an object of the present invention to provide an apparatus and method for easily creating an exploded view in which an assembly procedure can be easily confirmed.

[0005]

According to the present invention, an input section, a shape data memory for storing shape data of parts constituting an assembly, and an arithmetic section for displaying the assembly on a display section based on the shape data. And a means for deciding the disposition position of the disassembled state of the parts constituting the assembly based on the assembly process data and the shape data, and disassembling and assembling drawings according to the determined disposition position. The feature is that it is displayed on the display unit.

Specifically, the assembling process data includes an assembling order and an assembling direction of the parts, and the arrangement position determining means calculates an inner product of the vertex coordinates of the parts in the shape data memory and the assembling direction vector. Then, the minimum value of the inner product value is obtained, and the inner product of the vertex coordinates of the read component and the assembly direction vector is calculated, and the maximum value of the inner product values is obtained,
Based on the obtained difference, the intervals between the respective parts when disassembling the parts forming the assembly on the exploded view are determined, and the exploded view is displayed on the display unit according to the determined interval of the parts. Is to be displayed.

[0007]

According to the present invention, the inner position product between the vertex coordinates of the part in the shape data memory and the assembly direction vector is calculated by the arrangement position determining means, and the minimum inner product value is obtained and read out. When the inner product of the vertex coordinates of the part and the assembly direction vector is calculated, the maximum value of the inner product is calculated, and the parts constituting the assembly are disassembled on the exploded view based on the calculated difference. Since the interval between each of the parts is determined and the exploded view is displayed on the display unit in accordance with the determined interval between the parts, it is possible to automatically create the exploded view, and It is not necessary for each operator to specify the movement direction and the movement amount to move the operator, and it is possible to reduce the number of steps for creating the exploded assembly drawing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the structure of an exploded assembly drawing producing apparatus according to the present invention. The input device 101 is composed of a device such as a keyboard and a mouse that receives an instruction from a user and a device that receives data from another computer such as a communication device and a floppy disk device. The arithmetic unit 102 is a CP
It is configured by U and calculates data in the storage device 103 by a program stored in the storage device 103 and exchanges data with the input device 101 and the output device 104. The storage device 103 is composed of a RAM, a magnetic disk or the like, and stores programs and data. Output device 104
Is a device for transferring data to another computer such as a display device such as a CRT, a communication device, a floppy disk device or the like.

The storage device 103 stores shape data 105,
Assembly procedure data 106, shape data input program 10
7, an assembly procedure input program 108, an assembly parts movement program 109, and an exploded assembly drawing display program 110 are stored. The shape data 105 stores geometric information of the assembly. The assembly procedure data 106 stores an assembly part 111 and an assembly direction 112 for each assembly order. The shape data input program 107 takes in geometric information of the assembly from the input device 101 and stores it in the shape data 105. The assembly procedure input program fetches assembly parts and assembly directions from the input device 101 for each assembly sequence, and creates assembly procedure data 1
It is stored in 06. The assembly part movement program 109, in a certain assembly procedure step, the shape data of the assembly part 111, the shape data of the already mounted parts, and the assembly direction 11.
From 2, the position of the assembly part on the exploded view is calculated, and the part position of the assembly part in the shape data 105 is changed. The exploded assembly drawing display program 110 outputs the shape data 105 to the output device 104.

Shape data 105 and assembly procedure data 10
The input of 6 is performed by the user using a mouse and a keyboard, or the data created by another computer is input via a network or a floppy disk.

FIG. 43 shows an example of an exploded assembly drawing preparation method in this embodiment. In process 4301, the shape data of the parts to be assembled and the arrangement position of the parts in the completed assembly state are fetched. In process 4302, the assembly procedure data including the assembly order and the assembly direction data of the parts is fetched. In process 4303, the disposition position in the disassembled state of each part constituting the assembly is calculated from the part shape, the disposition position, the assembly order, and the assembly direction. In process 4304, the component shape is displayed based on the arrangement position obtained in process 4303.

FIG. 2 shows the detailed structure of an embodiment of the assembly parts movement program 109. The procedure sequential reading program 201 reads each assembling procedure step in the assembling procedure data 106 and stores it in the assembling part memory 202 and the assembling direction memory 208. The assembly direction 112 is
It represents the direction when the assembly parts are assembled to the already assembled parts, and is represented by a unit vector. Let this be V _a . Further, the assembled component memory 204 stores a list of components mounted in a procedure step before a certain assembly procedure step. Inner product minimum value calculation program 20
5 reads the list of assembled parts from the assembled part memory 204, calculates the inner product of the vertices of these parts and the mounting direction, and calculates the minimum value among them. _Let this be D _min . The inner product maximum value calculation program 206 reads out the components to be assembled from the assembled component memory 202, and extracts the coordinate values of the vertices of these components from the shape data 105. The inner product of those coordinate values and the assembly direction is calculated, and the maximum value among them is calculated. _Let this be D _max . The assembly component position changing program 207 obtains the movement vector V of the assembly component by the following equation (1). However, D
_There is a fixed amount of _const in advance.

[0013]

## EQU1 ## V = (D _min −D _max −D _const ) * V _a (1) Then, the position M _{o of the} assembly part is taken out from the shape data and multiplied by the movement matrix Mv obtained from the movement vector V. The value M is written in the shape data as a new part position. This calculation is based on the following formula (2).

[0014]

[Number 2] _{M = M v * M o ...} (2) assembly already parts additional program 208, to add the assembly parts you change the position in pre-assembled parts memory 204.

Next, the principle of the assembly parts moving program 109 creating an exploded assembly drawing will be described using a specific example.

FIG. 3 shows the two parts 301 and 302 assembled. It is assumed that the component 301 is an assembled component and the component 302 is an assembled component. Vector 303 is
The assembly direction of the component 302 is shown. The minimum inner product value calculation program 205 obtains the minimum value of the inner product of the vertices of the assembled component 301 and the assembly direction 303. In the example of FIG. 3, as shown in FIG. 4, the inner product with the vertex 401 is minimized and its value is 402. That is, the assembled parts 301
Considering the assembling direction 303 as a number line, the shape of exists in a region larger than the minimum value 402 of the inner product. On the other hand, the inner product maximum value calculation program 206 obtains the maximum inner product of the coordinate values of the vertices of the assembly component 302 and the assembly direction 303. In the example of FIG. 3, as shown in FIG.
The inner product of 03 and the assembly direction is the maximum, and the value is 404. That is, the shape of the assembly component 302 is 30
When 3 is considered as a number line, it exists in a region smaller than the maximum inner product value 404. Therefore, the minimum value 402
When the maximum value 404 is subtracted from the value, the value becomes 405, and when the assembly parts are moved by 405 in the assembly direction,
Assembly direction 30 of assembled component 301 and assembled component 302
The existing areas on the number line of 3 do not overlap. However, since the areas are in contact with each other as it is,
, A predetermined amount of 50 from the value of 405
If 1 is subtracted, the movement amount becomes 502. When the assembling component 302 is translated in the assembling direction 303 by the movement amount 502, an exploded view in which the already assembled part 301 and the assembling component 302 are separated is obtained.

FIG. 6 shows a processing flow of the assembly part moving program. In process 601, the assembly component of the first procedure step in the assembly procedure data is set as the assembled component. In process 602, processes 603 to 607 are sequentially applied to the second procedure step to the last procedure step. In process 603, the assembly parts and the assembly direction of the current procedure step are read from the assembly procedure data. Process 604
Then, the coordinates of all the vertices of the assembly parts are read from the shape data, the inner product of each vertex and the assembly direction is calculated, and the maximum value is calculated. In process 605, all the vertex coordinates of the assembled parts are read from the shape data,
The inner product of each vertex and the assembling direction is calculated, and the minimum value is calculated. In the process 606, the position of the assembly part is moved by a vector obtained by subtracting the maximum value from the minimum value and further subtracting a certain amount in the assembly direction.
In process 607, the assembly parts that have moved and become disassembled are added to the assembled parts.

Next, with reference to a specific example, the manner in which an exploded view is created by the processing flow of FIG. 6 will be described. FIG. 7 shows the shape of the assembly used for the explanation. In the structure of the assembly, the component 702 is fixed to the plate 701 by the bolt 703, and the component 704 is fixed to the plate 701 by the bolt 705. Assembling directions of the component 702 and the bolt 703 are the direction vector 706 and the component 7
Assembling direction of 04 and bolt 705 is direction vector 707.
Is.

Assembling procedure data for the assembly shown in FIG. 7 is as shown in FIG. 8, for example. A procedure step 801 is a sequence number of an assembly procedure, and the assembly is performed in the order of this number.
The assembly part 802 represents a part to be assembled in a certain procedure step. The parts shown in FIG. 8 correspond to the reference numerals attached to the parts in FIG. The assembling direction 803 is a direction vector representing the assembling direction of the component in a certain procedure step. The assembling direction shown in FIG. 8 corresponds to the code attached to the assembling direction vector in FIG. 7. Note that the first procedure step 80
In the case of No. 4, when the parts are placed first, it is not necessary to specify the assembly direction.

First, in process 601, the assembly part 701 of the first procedure step 804 is set as an assembled part. At this stage, the assembled state of FIG. 7 is still maintained. For the sake of explanation, in order to distinguish the assembled parts from the assembled parts, the assembled parts are shaded and the assembled parts are hatched. In the state of FIG. 7, the component 701 is the assembled component. Next, in process 602, processes 603 to 607 are repeatedly applied to procedure steps 2 to 5. When the processing 603 is executed in the second procedure step 805, the assembly component becomes 702. This state is shown in FIG. Processing 60
4, the inner product maximum value 901 is obtained, and the process 605 is obtained the inner product minimum value 902, and the process 606 is performed, the difference between the minimum value and the maximum value is 903, and when a certain amount of gap is 904, it is moved. A vector 905 is obtained, and the position of the component 702 after movement is 906. When the process 607 is executed, the part 702 that was an assembled part becomes an assembled part at the position 906. FIG. 10 shows a state where processing 603 to processing 607 is being executed in the third procedure step 806. The assembly parts are bolts 703 and the assembly direction vector is 706. When the process 604 is executed, since the assembly component is the bolt 703, the maximum inner product becomes 1001. When the processing 605 is executed, since the assembled parts are the parts 701 and 702, the minimum value of the inner product becomes 1002. 10
A value 1003 obtained by subtracting 1001 from 02 is obtained, and a value 1005 obtained by subtracting a constant value 1004 from the value 1005 is an assembled part.
When 03 is moved in the assembling direction 706, the position becomes 1006. Then, the component 703 becomes an assembled component at the position 1006. Similarly, FIG. 11 shows a state in which the processes 603 to 607 are being executed in the fourth procedure step 807. In this case, the maximum and minimum inner products are equal,
It becomes like 1101. Therefore, the amount of movement is 1 / gap
It becomes 102. Therefore, the position of the component 704 after the movement is 1
It becomes 103. Further, FIG. 12 shows a state in which processing 603 to processing 607 is being executed in the fifth procedure step 808. The maximum value of the inner product of the apex of the assembling part 705 and the assembling direction 707 is 1201, the minimum value of the inner product of the apex of the assembling parts 701 to 704 and the assembling direction 707 is 1202, and the difference between the minimum value and the maximum value is 1203. , If the gap is 1204, the movement amount is 1
It becomes 205. Therefore, the position of the component 705 after movement is 12
Will be 06. FIG. 13 shows a state of the shape data after the processing is completed. By displaying this, an exploded view can be obtained.

In this embodiment, the description has been given in two dimensions.
In the present invention, this can be realized as it is even in three dimensions. For example, in FIG. 14, the assembly parts are 1401, the assembled parts are 1402, and the assembly direction is the downward direction 1403.
The maximum value of the inner product of the assembling direction 1403 and the vertex coordinates of the assembling component 1401 is 1404. Further, the minimum value of the inner product of the assembly direction 1403 and the vertex coordinates of the assembled component 1402 is 14
It will be 05. 1407, which is obtained by subtracting the maximum value 1405 from the minimum value 1404 and further subtracting the gap 1406, becomes the movement vector of the assembly part. FIG. 15 shows shape data after moving the assembly part 1402 by the movement vector.

Further, in the above embodiment, the inner product of the vertices of the assembling part and the assembling part and the assembling direction vector is calculated, but when the part includes a curved surface, the curve and the control point of the curved surface are also calculated. When used as the target of inner product calculation, it is possible to create an easier-to-understand exploded assembly drawing of parts contacting with each other on a curved surface. In FIG. 16, the assembling parts are 1601 and the assembling parts are 1602. When the assembly part and the assembly target part include the curved surface 1603, when the inner product with the assembly direction vector 1609 is calculated, the curved surface 16 is obtained along with the coordinates of the vertices 1607 and 1608.
The control points 1605 and 1606 of 03 are also targets for calculation.
As a result, the maximum inner product of the coordinate values of the vertices and control points of the assembly part 1601 and the assembly direction vector 1609 is the inner product value 1 of the coordinate value of the vertex 1608 and the direction vector 1609.
It becomes 610. Further, the minimum value of the inner product of the coordinate values of the vertices of the assembly target component 1602 and the control point and the assembly direction vector 1609 is the coordinate value of the control point 1605 and the direction vector 160.
The inner product value 1611 of 9 is obtained. Minimum value 1611 and maximum value 1
A value 1613 obtained by subtracting the gap amount 1612 from the difference of 610 is the movement amount of the assembly part 1601. FIG. 17 shows the shape data after the movement. In this way, it is not possible to separate all parts including curves and curved surfaces using only vertex coordinates, but by using control points of curves and curved surfaces, it is possible to create an exploded assembly drawing in which all parts are separated. .

In another embodiment of the present invention, the vertices of the bounding box, which is a polygon including the part shape, are used instead of the vertices and control points of the shape data of the part. Figure 1
FIG. 8 shows the configuration of the assembly component movement amount calculation program 109 for realizing this embodiment. This program is obtained by adding a bounding box calculation program 1801 to the assembly part movement amount calculation program 109 shown in FIG.
The bounding box calculation program 1801 refers to the shape data 105 and obtains a polygon including the part shape. The inner product minimum value calculation program 205 reads out the bounding box corresponding to the part stored in the assembled part memory 204 from the bounding box calculation program 1801 and stores it in the vertex coordinates and the assembly direction memory 208 one by one. The inner product with the assembly direction vector is calculated, and the minimum value is obtained from them. The maximum inner product value calculation program 206 uses the assembled component memory 20.
Bounding box calculation program 1801 for the bounding box corresponding to the part stored in FIG.
Read from each one, and each vertex coordinate and assembly direction memory 2
The inner product with the assembly direction vector stored in 08 is calculated, and the maximum value is calculated from them. Other parts of FIG. 18 are similar to those of FIG.

A bounding box which is a polygon including a part shape is a cube parallel to the coordinate axis 1901 of the part coordinate system or the assembly coordinate system as shown in FIG.
It is 1902. Such a bounding box shows the maximum and minimum values in the x-axis direction, the maximum and minimum values in the y-axis direction, and the maximum and minimum values in the z-axis direction of the coordinate values of the vertices and control points that make up the part shape. It can be calculated by obtaining each. The calculation of the bounding box may be performed in advance for the bounding boxes of all parts before calculating the movement amount, or may be performed during the movement amount calculation. Further, it may be included in the shape data 105. At this time, the bounding box calculation program 1801 is unnecessary. Since the bounding box completely includes the part shape, the moving amount of the assembled part is always larger than the moving amount calculated using the coordinates of the vertices and control points, so all parts are separated and disassembled. Assembly drawings can be created.

The present embodiment using the bounding box will be specifically described below. Figure 44
FIG. 6 is a flowchart showing a procedure for determining a component arrangement on an exploded view. In process 4401, the shape data of the parts to be assembled and the arrangement positions of the parts in the completed assembly state are fetched. In process 4402, the assembly procedure data including the assembly order and the assembly direction data of the parts is fetched. In processing 4403, the assembled parts list, which is a list of assembled parts, is emptied and then the first assembly procedure data
The second assembly part is set in the assembly parts list. In the process 4404, the processes 4405 to 5405 are performed in the order of assembling order from the second assembled component to the final assembled component in the assembly procedure data.
The process 4409 is repeated. In process 4405, the bounding box of the assembled part is calculated. Next processing 440
In step 6, a bounding box including all parts included in the parts-to-be-assembled list is calculated. Process 4407
Then, the assembly direction and the bounding box of the assembly parts,
From the bounding boxes of the parts to be assembled, the amount of movement of the parts to be assembled such that their bounding boxes are adjacent to each other is calculated. In process 4408, the assembly component is moved in the direction opposite to the assembly direction by the movement amount obtained in process 4407. In process 4409, the name of the assembly component that has been moved is added to the assembly component list.

FIG. 45 shows a detailed flowchart of the process 4407. In process 4501, a half line extending in the opposite direction of the assembling direction is drawn with each vertex of the bounding box of the assembling component as a starting point. In the case of two dimensions, four half lines can be drawn. In the case of 3D, 6 half lines can be drawn. Process 4
In step 502, the intersection between the half line created in step 4501 and the bounding box of the part to be assembled is determined. When one half line has two intersections with the bounding box of the part to be assembled, the intersection farther from the starting point is taken. In process 4503, the distance from the start point to the intersection is calculated for each half line. If there is no intersection, the distance is 0. In process 4504, the maximum value is selected from the distances calculated in process 4503, and it is set as the movement amount.

46 to 48 show execution examples of disassembled assembly drawing creation according to this embodiment. FIG. 46 is a drawing showing a completed state of the assembly for explanation. Bolt 46 on plate 4601
The structure is such that 02 is fixed. Bolt 46
It is assumed that 02 is an assembling part, the plate 4601 is an assembling part, and the assembling direction of the bolt 4602 is 4603. Figure 4
The processing will be described in Fig. 7 while showing information such as bounding boxes and half lines used in the middle of the calculation. First, by processing 4405 and processing 4406, the bounding box 4701 of the part to be assembled and the bounding box 4702 of the part to be assembled are calculated. Next, in processing 4501, the bounding box 4 of the assembly parts
702 vertices 4703, 4704, 4705, 4706
To half line 4707, 4 in the direction opposite to the assembling direction 4603
Pull out 708, 4709, and 4710. Next, process 45
02 by half lines 4707, 4708, 4709, 4710
And intersections 4711, 4712, 4713, 4714 of the bounding box 4701 of the assembly target component are calculated.
Next, by processing 4503, the distance between the start point and the intersection, that is, vertex 4703 to intersection 4711, vertex 4704 to intersection 4712, vertex 4705 to intersection 4713, vertex 4706.
~ Calculate intersection 4714. Further, in process 4504, the maximum value of the distances between the start point and the intersection, that is, the distance from the vertex 4703 to the intersection 4711 in the case of FIG.
FIG. 48 shows the movement amount 4801 calculated by the process 4408.
Shows the state where the assembling component 4602 is moved in the direction opposite to the assembling direction 4603. As described above, by using the movement amount calculated by the processing flow shown in FIG. 45, the assembly component can be arranged at a position where the bounding boxes of the assembly component and the assembly target component do not overlap each other. The parts to be assembled can be separated to arrange the parts. If this is applied in the order of the assembly procedure, an exploded view of the entire assembly can be automatically created.

Still another embodiment of the present invention will be described below. 20 is a diagram showing the disassembled assembly drawing display program 11 in which the assembly line movement input program 2001 is added to the disassembled assembly drawing creation apparatus of FIG.
FIG. 16 is a functional configuration diagram in which 0 is changed to an exploded view display program 2003 for displaying 0 in the line-of-sight direction input by the line-of-sight direction input program 2001. The line-of-sight direction input program 2001 takes in a user's instruction from the input device 101 or a line-of-sight vector from another program or a computer. The assembly part movement program 2002 considering the line-of-sight direction is a line-of-sight direction input program 2001.
From the line-of-sight direction vector, the movement amount of the part is determined from the shape data 105 of the assembly, the assembly procedure data 106, and the line-of-sight direction vector, the position of the part read from the shape data 105 is changed, and the change is written in the shape data. .

FIG. 21 shows a block diagram of an embodiment of the assembly part movement program 2002 in consideration of the line-of-sight direction. The procedure sequential reading program 201 uses the assembly procedure data 106.
Each assembling procedure step is read out and stored in the assembling part memory 202 and the assembling direction memory 208.
The assembling direction 112 represents a direction when the assembling parts are assembled to the already assembled parts, and is represented by a unit vector. Let this be V _a . In addition, the assembled parts memory 20
4 stores a list of parts attached in a procedure step before a certain assembly procedure step. The projection program 2101 onto the plane whose normal is the line-of-sight direction receives the line-of-sight direction vector V _e from the line-of-sight direction input program 2001, and also reads the assembly direction vector V _a from the assembly direction memory 208. By (3), the projection vector V _p of the assembly direction vector V _{a on} the plane whose normal vector is the line-of-sight direction V _e is calculated.

[0030]

## EQU00003 ## V _p = (V _e × V _a ) / | V _e × V _a | × V _e (3) The minimum inner product value calculation program 2102 displays a list of mounted parts from the assembled part memory 204. Read
The inner product of the vertices of those parts and the projection vector V _p is calculated, and the minimum value among them is calculated. _Let this be D _min .
The inner product maximum value calculation program 2103 reads the components to be assembled from the assembly component memory 202, and extracts the coordinate values of the vertices of these components from the shape data 105. The dot product of these points and the projection vector V _p is calculated, and the maximum value among them is obtained. _Let this be D _max . The assembly component position changing program 2104 obtains the movement vector V of the assembly component by the following equation (4). However, D _const has a predetermined amount of clearance.

[0031]

(4) V = (D _min −D _max −D _const ) * V _a / (V _p · V _a ) (4) Then, the position M _{o of the} assembly part is extracted from the shape data 105, and the movement vector V is obtained. Moving matrix M obtained from
Shape data 10 with the value M multiplied by _v as the new part position
Write to 5, this calculation is according to equation (2) below.

[0032]

[Equation 5] M = M _v * M _o (2) The assembled component addition program 208 adds the assembled component whose position has been changed to the assembled component memory 204.

Next, the principle of how the assembly parts movement program 2002 creates an exploded assembly drawing will be described using a specific example. FIG. 22 shows a state where the two parts 2201 and 2202 are assembled. The component 2201 is an assembled component and the component 2202 is an assembled component. Vector 2203
Shows the assembling direction V _a part 2202. The line-of-sight direction vector V _e is the direction from the front to the other side perpendicular to the paper surface in FIG. Figure 23 is a view of the assembly of FIG. 22 from the direction perpendicular to the viewing direction vector V _e and assembling direction vector V _a. The vector 2301 is the line-of-sight direction vector V _e . The direction vector V _t perpendicular to the paper surface of FIG. 23 is perpendicular to the line-of-sight direction vector V _e and perpendicular to the assembling direction vector V _a , so the line-of-sight direction vector V _e
Is a vector obtained by normalizing the vector calculated by the outer product of the assembly direction vector V _a . Therefore, V _t is _calculated by the following equation (5).

[0034]

V _t = (V _e × V _a ) / | V _e × V _a | (5) where V _t is a vector 2302 from the front side to the other side in FIG. 23.

The projection vector V _p of the assembling direction vector V _{a on} the plane having the line-of-sight direction V _e as the normal vector is shown in FIG.
Then, the direction vector becomes 2303. Projection vector V
_{Since p} is perpendicular to V _t and perpendicular to the line-of-sight direction V _e , V _t
And V _e are the vectors calculated by the cross product. However, since V _t and V _e are orthogonal, there is no need to normalize. To summarize the above, the projection vector V _p is obtained by the following equation (6).

[0036]

V _p = V _t × V _e = (V _e × V _a ) / | V _e × V _a | × V _e (6) In the inner product minimum value calculation program 2102, The minimum value of the inner product of the coordinate value and the projection vector 2303 is calculated. In the example of FIG. 22, as shown in FIG. 23, the inner product with the vertex 2304 is the minimum, and the value is 23.
It will be 05. On the other hand, the inner product maximum value calculation program 2103
Then, the maximum value of the inner product of the coordinate values of the vertices of the assembly part 2202 and the projection vector 2303 is obtained. In the example of FIG. 22,
As shown in FIG. 23, the vertex 2306 and the projection vector 23
The inner product of 03 is the maximum, and its value is 2307. Next, when the maximum value 2307 is subtracted from the minimum value 2305, the value becomes 2308. Subtracting a predetermined constant amount 2309 from the value of 2308 gives 2310. 23
Since 10 is the amount of movement on the projection vector, the assembling direction 2
The result projected on the projection vector 2303 by 203 is 231.
It is necessary to obtain a movement amount that will be zero. This can be done by dividing the movement amount 2310 in the projection vector 2303 direction by the inner product of the projection vector 2303 and the assembly direction vector 2203. In this way, the movement amount 2311 can be calculated. When the assembling component 2202 is moved in parallel in the assembling direction 2203 by the movement amount 2311, the result is as shown in FIG. 24. When seen from the line-of-sight direction, as shown in FIG. 25, the assembling part 2201 and the assembling component 2202 overlap each other. There is no disassembly drawing.

FIG. 26 shows a processing flow of the assembly part moving program in consideration of the line-of-sight direction. In process 2601, the line-of-sight direction vector is fetched from the line-of-sight direction input program. In process 2602, the assembly component of the first procedure step in the assembly procedure data is set as the assembled component. Process 2
In 603, processing 2604 to processing 2610 are sequentially applied to the second procedure step to the last procedure step. In process 2604, the assembly parts and the assembly direction of the current procedure step are read from the assembly procedure data. Process 2
At 605, it is checked whether or not the line-of-sight direction and the assembling direction are parallel to each other. If they are parallel to each other, the outer product becomes 0, which is an error. In process 2606, the projection assembling direction V _p is calculated by the above equation (6). Process 2607
Then, all the vertex coordinates of the assembly parts are read from the shape data, the inner product of each vertex and the projection assembly direction is calculated, and the maximum value among the values is obtained. In process 2608, all the vertex coordinates of the assembled parts are read from the shape data, the inner product of each vertex and the projection assembling direction is calculated, and the minimum value among the values is obtained. In process 2609, the maximum value is subtracted from the minimum value, and a value obtained by subtracting a certain amount is divided by the inner product of the assembling direction and the projected assembling direction, and the assembling parts are obtained by multiplying the assembling direction by a vector. Move the position of. When the movement vector is V, it is calculated by the following equation (4).

[0038]

[Equation 8] V = (D _min −D _max −D _const ) / (V _p · V _a ) * V _a (4) where D _min is the minimum value of the inner product obtained in processing 2608, and D _max is , Maximum value of inner product obtained in processing 2607, D
_const is a certain amount of gap value, V _a is the assembly direction vector, V
_p is the projection assembling direction vector obtained in processing 2606, and V _a
Is the assembly direction vector read in processing 2604.
In step 2610, the assembly parts that have moved and become disassembled are added to the assembled parts.

In this embodiment, the coordinate value of the vertex is used for the inner product calculation with the projection vector. However, when the curved surface is included, the coordinate value of the control point of the curved surface may be used together with the vertex coordinate value. Further, instead of the vertices and control points, the vertex coordinates of the bounding box, which is a polyhedron including the shape of the part, may be used.

FIG. 27 is a detailed configuration 2 of still another embodiment of the assembly part moving program 109 shown in FIGS. 1 and 2.
701 is shown. The procedure sequential reading program 201 is
Each assembling procedure step in the assembling procedure data 106 is read out and stored in the assembling part memory 202 and the assembling direction memory 208. The assembling direction 112 represents a direction when the assembling parts are assembled to the already assembled parts, and is represented by a unit vector. Let this be V _a . Further, the assembled component memory 204 stores a list of components mounted in a procedure step before a certain assembly procedure step. The contact surface detection program 2702 reads the assembled parts from the assembled parts memory 202, reads the assembled parts from the assembled parts memory 204, and shapes the contact surfaces between the assembled parts and the assembled parts. The data 105 is referred to and detected.

The inner product minimum value calculation program 205 takes out the contact surfaces of the assembled parts and the assembled parts from the contact surface detection program 2702, calculates the inner product of the vertex and the mounting direction, and calculates the minimum value among them. . _Let this be D _min . The inner product maximum value calculation program 206 reads out the components to be assembled from the assembled component memory 202, and extracts the coordinate values of the vertices of these components from the shape data 105. The inner product of these points and the assembly direction is calculated, and the maximum value is calculated. _Let this be D _max . The assembly component position changing program 207 obtains the movement vector V of the assembly component by the above equation (1). Then, the position M _{o of the} assembled part is taken out from the shape data, and the value M multiplied by the movement matrix M _v obtained from the movement vector V is written in the shape data as a new part position. This calculation is based on the above equation (2). The assembled component addition program 208 adds the assembled component whose position has been changed to the assembled component memory 204.

Next, the principle of the assembly parts movement program 109 creating an exploded assembly drawing will be described using a specific example. FIG. 28 shows a state in which the two parts 2801 and 2802 are assembled. It is assumed that the part 2801 is an assembled part and the part 2802 is an assembled part. Vector 2803
Shows the assembling direction of the component 2802. First, the contact surface detection program 2702 detects the contact surface between the assembled part 2801 and the assembled part 2802, and obtains a screw seat surface 2901 and a screw surface 2902 as shown in FIG.
The inner product minimum value calculation program 205 obtains the minimum inner product of the coordinate values of the vertices of the surfaces 2901 and 2902 and the assembling direction 2803. In the example of FIG. 29, as shown in FIG. 30, the vertex 3001 of the surface 2901 and the direction vector 2803.
The inner product of is minimized and its value is 3002. on the other hand,
In the inner product maximum value calculation program 206, the assembly parts 280
The inner product of the coordinate value of the vertex 2 and the assembling direction 2803 is calculated. In the example of FIG. 28, as shown in FIG.
The inner product of 3 and the assembly direction 2803 becomes the maximum, and the value is 3
It becomes 004. Next, the maximum value 3004 is subtracted from the minimum value 3002, and a predetermined fixed amount 3005 is subtracted, so that the movement amount becomes 3006. When the assembling component 2802 is moved in parallel in the assembling direction 2803 by the movement amount 3006, FIG.
As a result, an exploded view is obtained in which the assembled part 2801 and the assembled component 2802 are separated.

In this embodiment, the vertex of the contact surface is used for the inner product calculation, but the control points of the curved surface and the curve may be used for the inner product calculation together with the vertex. Further, instead of the vertices of the contact surface or the control points, a bounding box including the contact surface may be obtained in advance, and the vertices of this bounding box may be used for inner product calculation with the assembly direction vector. Further, a contact surface search program may be incorporated in the assembly part movement program 2002 considering the line-of-sight direction shown in FIG. 21, and the vertex of the contact surface may be used for the inner product minimum value calculation instead of the vertex of the part.

Next, FIG. 32 shows the configuration of still another embodiment of the present invention. 32 is a correspondence line creation program 3201 for creating a correspondence line representing correspondence between a contact surface of an assembled part and a contact surface of an already assembled part in the assembly part movement program 2701 including the contact surface detection program of FIG. Is added. The operation of the corresponding line creation program 3201 will be described with reference to FIGS. 33 and 34. The correspondence line creation program 3201 receives the contact surface from the contact surface detection program 2702 and calculates the center of gravity of the contact surface, for example. In the example of FIG. 33, the contact surface 2901 is passed from the contact surface detection program 2702, and the center of gravity 3301 is obtained. Further, the movement vector 3006 of the assembly part is received from the assembly part position changing program 207, and a point 3302 obtained by moving the center of gravity 3301 of the contact surface by the movement vector 3006 is obtained. The line segment connecting the points 3301 and 3302 is the shape data 1
Add to 05. When this is displayed, as shown in FIG. 34, a correspondence line 3401 representing the correspondence between the contact surface of the assembled component and the contact surface of the assembled component can be displayed together with the exploded view. Although the corresponding line 3401 is represented by the alternate long and short dash line in FIG. 34, the corresponding line 3401 may be displayed in a color or line thickness different from that of the line representing the shape.

In the above-described embodiments, when calculating the movement vector of the assembly part, the gap D _const having a constant value is used.
However, this gap may be calculated from the line-of-sight direction vector and the assembly direction vector.

FIG. 35 shows an example in which the gap between the assembled component and the assembled component is a constant value, and the calculation is performed from the line-of-sight direction vector and the assembly direction vector. A gaze direction is a vector 3501. If the parts 3502 and 3503 are assembled in the assembly direction 3504, the gap is 350
It becomes 5. In this case, the assembling direction 3504 is the line-of-sight direction 35
Since it is perpendicular to 01, the apparent gap 3507 seen from the line-of-sight direction 3501 becomes equal to the actual gap 3505. However, the parts 3508 and 3509 are assembled in the assembly direction 351.
When assembled with 0, the gap is 3511, which is the same size as 3505, but the apparent gap 3512 seen from the line-of-sight direction 3501 is smaller than 3507. If the apparent gap becomes smaller, the parts will appear closer to each other and it will be difficult to understand as an exploded view. The apparent gap becomes smaller as the assembling direction and the line-of-sight direction become closer to each other. Therefore, for example, the gap D _const is calculated by the following equation (7).
Calculate as.

[0047]

[Equation 9]

However, V _a is an assembly direction vector, V _e is a line-of-sight direction vector, and C is a positive constant. For example, in FIG.
The part 3513 and the part 3514 in FIG.
In the case of assembling with 15, the apparent length 3517 of the vector 3516 of length 1 parallel to the assembling direction 3515 is 3
Since the length of 518 is the absolute value of the inner product of V _a and V _e , it is the denominator of the above equation (7). Therefore, the gap 3519 is
By calculating with the above formula (7), the apparent gap 3520 can be maintained at a constant value C regardless of the relationship between the assembly direction and the line-of-sight direction.

Next, depending on the structure of the assembly, it may not be possible to assemble the parts one by one, and it may not be possible to assemble unless the subassemblies are assembled after assembling several parts. An embodiment in the case where there is a sub-assembly will be described. First, FIG. 49 shows an example of such an assembly. The assembly shown in FIG. 49 is composed of parts 4901, 4902, and 4903.
It consists of two parts. In the case of such an assembly, the parts 49
It cannot be assembled in the order of 01, 4902, 4903. First, the component 4901 must be placed, then the components 4902 and 4903 must be assembled, and then the component 4901 must be assembled.

The assembly procedure data for such an assembly can be expressed, for example, as shown in FIG. The component level is shown in FIG.
The depth from the root 5101 when the subassembly relation of the assembly is represented by a tree structure as shown in FIG. Therefore, the component level of the component 4901 is 1, the components 4902, 4
The component level of 903 is 2, and the level of the sub-assembly in which the components 4902 and 4903 are assembled is 1.

FIG. 52 shows a flow chart of an embodiment of a method for creating an exploded assembly drawing from assembly sequence data in which a sub-assembly exists during assembly according to the present invention. processing
At 5201, shape data including the shapes of the parts constituting the assembly and the position of the parts in the completed assembly state is input. Process 52
In 02, as shown in FIG.
Enter the assembly procedure data consisting of assembly direction and part level. In process 5203, the first assembly component of the assembly procedure data is set in the assembly component list. In process 5204, the processes from process 5205 onward are sequentially applied to the second assembled component to the last assembled component in the assembly procedure data. In process 5205, it is determined whether the assembled part is the first part of the sub-assembly. For example, when the sub-assembly is expressed at the part level as shown in FIG. 50, if the part level of the assembly part is higher than the part level of the previous assembly part, it becomes the first part of the sub-assembly, and the process 52
In 05, the process branches to yes and executes processes 5206 and 5207. If the parts level is the same or lower than the level of the previous assembly part, branch to no and execute steps 5208-52.
Execute 11. In process 5206, the contents of the current mounted component list are pushed to the mounted component storage stack. In process 5207, after the list of parts to be assembled is emptied, the current part to be assembled is set in the list of parts to be assembled. By the process 5206 and the process 5207, the information of the parts assembled so far is temporarily saved, and the preparation for creating the exploded view regarding the assembly of the sub-assembly is completed. Process 52
At 08, the disposition position of the assembled component is calculated from the shape data of the assembled component, the assembled component, and the assembly direction of the assembled component. The calculation method is as described in the above embodiments. In process 5209, the assembly component is arranged at the arrangement position calculated in process 5208. In process 5210, it is determined whether or not the current assembly part is the last part of the sub-assembly assembly, and if it is the last part, the process branches to process 5211. When the current assembly part is not the last part of the sub-assembly part, the process branches to no and branches to process 5212. For example, when the sub-assembly is expressed at the part level as shown in FIG. 50, the sub-assembly is the last part when the part level of the current assembling part is higher than the level of the next assembling part. In process 5211, the assembled component last pushed to the assembled component storage stack is popped, and the popped component group is set in the current assembled component list. In process 5212, the assembly component is added to the assembly component list. After applying the process 5205 to all the assembly parts of the assembly procedure data by the process 5204, the process 52
At 13, the shape data after the movement is displayed. As a result, an exploded view is displayed.

The stack for storing the components to be assembled is, for example, a stack pointer 5301 and a component name 530 as shown in FIG.
3 and the number of parts 5302. The stack pointer 5301 stores the number of parts-to-be-assembled parts currently stored in the stack. When the assembled parts list is newly pushed, only one stack pointer is added and the value of the stack pointer after the addition is used as an index, in this case, the third line 5304 shows the number of parts and the part name. Store the list. On the other hand, when popping from the stack, the part name list of the row with the value of the stack pointer 5301 as an index is taken out, the row is deleted from the table, and the value of the stack pointer 5301 is decremented by one. In the example of FIG. 53, since the value of the stack pointer 5301 is 2, the component name C is taken out from the second row 5305, this row 5305 is deleted, and the value of the stack pointer 5301 is decremented by 1 to be 1. In this way, the list of component names stored later can be retrieved first.

The processing of FIG. 52 is performed according to the data of FIG. 49 and FIG.
A state of creating an exploded assembly drawing when applied to assembly procedure data of 0 will be described with reference to the drawings. Processing 5201 and 5202
Then, the shape data diagram 49 and the assembly procedure data diagram 50 are input. Next, when a process 5203 is executed, the assembly component 4901 of the first assembly procedure data in FIG. 50 is set in the assembly component list. Process 52 for next assembly part 4903
Check at 05 to see if this is the first part of the subassembly assembly. The level of the immediately preceding assembly part 4901 is 1, but the level of the current assembly part 4903 is 2,
It can be seen that this is the beginning of subassembly assembly because the component level of the current assembly component is larger. Therefore, the contents of the component list to be assembled, 4901 in this case, is stored in the stack for the component to be assembled by processing 5206. And
By processing 5207, the current assembly part 4903 is set as the assembly target part. After that, the processing loops in the processing 5204, and the processing 5205 and the subsequent steps are applied to the assembly part 4902. First, in process 5205, it is checked whether it is the first subassembly. The component level of the previous assembly component 4903 and the component level of the current assembly component 4902 are 2 and the same. Therefore, since it is not the first part of the sub-assembly assembly, the process branches to no and proceeds to process 5208. here,
Using the shape data of the assembly part 4902 and the assembly target part 4903 and the assembly direction data of the assembly part 4902, the disposition state disposition position is calculated. Processing 520 based on the calculation result
FIG. 54 shows a state in which 4902 is moved at 9. Next, in process 5210, it is checked whether it is the end of subassembly assembly. The component level of the component 4902 is 2, and the next assembly component 4
Since the component level of 902 + 4903 is 1, it is the last component of subassembly assembly. Therefore, the process branches to yes, pops the component 4901 from the assembled component stack, and sets it in the assembled component list. After this, processing 52
The process loops at 04, and the processes 5205 and below are applied to the assembly parts 4902 + 4903. Assembly parts 4902 + 4903
Indicates that the two parts 4902 and 4903 are assembled and assembled. In processing 5205, the component 49
The component level of 02 + 4903 is 1, and the previous assembly component 49
The 02 part level is 2 and is not the first part of the subassembly assembly. Therefore, branch to no and process 5
Proceed to 208. Here, the position and shape data of the disassembled state 4902 and 4903 calculated in the previous loop are used as the assembly parts and the part 4901 is the assembly parts 4902 and 4903.
The position of the decomposed state is obtained, and in step 5209 4902 is obtained.
And move 4903. This state is shown in FIG. As described above, an exploded assembly drawing of assembly procedure data with subassembly assembly can be created.

As an assembly procedure data with sub-assembly assembly, an embodiment has been shown in which the sub-assembly is expressed at the component level as shown in FIG. 50. However, as shown in FIG. 56, a flag indicating the presence or absence of sub-assembly assembly is included in the assembly procedure data. When the flag is 0, the sub-assembly is not assembled, and when the flag is 1, the sub-assembly is assembled. The assembly procedure for subassembly assembly is represented by preparing another assembly procedure data as shown in FIG. The correspondence between the assembly part 4904 with sub-assembly assembly and the assembly procedure data for sub-assembly assembly shown in FIG. 56 is that the assembly part name and the sub-assembly name match by storing the sub-assembly name in the assembly procedure data. You can take action by examining. In the case of expressing such assembly procedure data, it is determined whether or not the subassembly assembly is the first one when the subassembly flag is 1. Also, the assembly procedure data having the same sub-assembly name as the assembly part name is retrieved, and the first assembly part is set as a new assembly target part. Whether the end of the sub-assembly is assembled is determined by whether the end of the assembly sequence data is reached.

Next, using a specific example, a state in which an assembly procedure for an assembly is created by the exploded assembly drawing creation apparatus shown in FIG. 1 will be described. FIG. 36 shows the structure of the assembly used for the explanation. Assembled parts are parts 3601, parts 3602, parts 3
603, a component 3604. FIG. 37 shows an example of the assembly procedure input by the user. This places component 3601 first, then component 3602 from above, then component 3603 from the side, and finally component 36.
04 is attached from above. FIG. 37 shows an exploded view of this created by the apparatus for creating an exploded view according to the present invention. The user who sees FIG.
It tries to attach the part 3603 from the side, but the part 360
You can see that 1 is an obstacle and cannot be installed. Since the component 3603 can be attached only to the component 3601 from above, the user gives an instruction to the assembly procedure input program 108 to change the attachment direction 3901 of the component 3603 from above as in the assembly procedure of FIG.
Based on the assembly procedure of FIG. 39, the assembly parts movement program 109
When an exploded view is created by activating, and is displayed by the exploded view display program 110, it becomes as shown in FIG. From FIG. 40, it is understood that the user attaches the component 3602 and then attaches the component 3603, so that the component 3602 interferes and the component 3603 cannot be attached. Then, the user gives an instruction to the assembly procedure input program 108 to change the assembly procedure step 4101 of the part 3603 before the assembly procedure step 4102 of the part 3602 as in the assembly procedure of FIG. FIG. 42 shows an exploded assembly drawing created by activating the assembly part moving program 109 based on the assembly procedure of FIG. 41 and displayed by the exploded assembly drawing display program 110. From FIG. 42, it can be seen that there is no malfunction such that parts collide during assembly. In this way, the correct assembly procedure can be obtained by repeatedly inputting the assembly procedure and creating the exploded assembly drawing.

Here, FIG. 58 shows an example of a method of changing the assembly procedure using the exploded view according to the present invention. In process 5801, the shape data of the shapes of the parts constituting the assembly for which the disassembled assembly drawing is created and the position of the parts in the completed assembly state are input. In process 5802, assembly procedure data including an assembly order, an assembled part, and an assembly direction is input.
In process 5803, the disassembled part position is calculated from the assembly shape data and the assembly procedure data. In process 5804,
The component shape is displayed at the component position in the disassembled state calculated in processing 5803, and is displayed as an exploded view. Process 5805
Then, the user is asked whether or not there is a change in the assembly procedure. The user uses an input device such as a keyboard or a mouse to input whether or not the change is necessary. If there is no need to change, the procedure changing process ends. When you need to change
Processing 5806 is executed. In process 5806, the user is inquired about an instruction to change the procedure. The user inputs the parts that need to be changed and the changed contents by using a keyboard or a mouse. A plurality of parts to be changed are designated, and in process 5807, the assembly procedure data is changed based on the change instruction input by the user. As the change instruction, for example, there is an instruction to specify two parts and change the assembly order of the parts.
Another example is an instruction to sequentially instruct a plurality of parts to be changed and then insert a procedure in the order instructed before or after a separately designated part.

59 to 63 show execution examples of the assembly sequence editing method shown in FIG. FIG. 59 is an example of the shape data input in the process 5801. In this example, the assembly is four parts 5901, 5902, 5903, 5904.
It consists of two parts. FIG. 60 is an example of the assembly procedure data input in process 5802. This assembly procedure data is
First, the component 5901 is placed, then the component 5902 is assembled from the −Y axis direction, then the component 5903 is assembled from the −Y axis direction, and finally the component 5904 is assembled from the −Y direction. FIG. 61 is an exploded view generated by the process 5801 and the process 5804. The process 5805 displays the assembly procedure change menu 6101, and the user uses, for example, the mouse to change the command 610.
Select 2. As a result, control is transferred to processing 5806,
Enter the change instruction. For example, in the case of the swap command,
Two parts 5903 and 5904 are designated. Then, by processing 5807, the part 59 in the assembly procedure data is
02 and the part 5903 are exchanged. FIG. 62 shows the assembly procedure data after the change. Process 580 using the changed assembly procedure data and the shape data input in process 5801.
The arrangement position is calculated in step 3 and the result displayed in step 5804 is as shown in FIG. After displaying the disassembled assembly drawing after the change,
By the processing 5805 again, the assembly procedure change menu 6101
Is displayed. Here, the user uses the move command 6103.
If is selected, a change instruction is input in process 5806. In the case of the move command, the parts to be sequentially moved and the parts to be moved are instructed on the exploded view, and the menu is used to instruct whether to move before or after the parts to be moved. For example, in FIG. 63, the parts 5903 and
The order is 5904, and then 5902 is specified as the destination part. Then, “before” is selected from the menu 6301. In process 5807, according to the change instruction input in process 5806, the parts 5903 and 5904 are moved in front of the part 5902 in this order, and as a result, assembly procedure data as shown in FIG. 64 is obtained. Based on the assembly procedure data of FIG. 64 and the shape data and arrangement data of FIG. 59, the process 58
When the arrangement position is calculated in 03 and displayed in process 5804, an exploded view as shown in FIG. 65 is obtained. In processing 5805, the menu 6101 is displayed, and when the user does not need to change the assembly sequence any more, the end 6104 is selected to end the editing processing.

In this way, when the assembly procedure is instructed on the disassembled drawing, the parts are disassembled so that it is easy to instruct the parts, and on the exploded view, the parts are arranged in the order of the assembling order. Therefore, it becomes easy to grasp the assembly order of the parts. Therefore, it is easier to change the assembly order on the exploded view than to change the order in the assembled state.

As described above, according to the embodiment of the present invention, the disassembled assembly drawing can be automatically created if there is at least the shape data and the assembly procedure data.

Further, instead of the vertices of the part shape and the control points, the vertices of the bounding box including the part shape are used, and the inner product of at most 6 vertices and the assembly direction vector is calculated for one part. Therefore, there is an effect that an exploded view can be created at high speed.

Furthermore, by using the line-of-sight direction of the exploded view for calculating the movement amount of the assembled parts, it is possible to create a diagram in which the disjoint parts do not seem to overlap with each other, so that the exploded view is easy to understand. There is an effect that can be created.

Also, by using the line-of-sight direction of the exploded view for calculating the movement amount of the assembled parts, it is possible to create a diagram in which the disassembled parts are apparently arranged at equal intervals, and thus it is easy to understand. The effect is that an exploded view can be created.

Further, since the surfaces to be contacted in the assembled state can be connected by a line on the exploded view, there is an effect that an exploded view in which the assembly direction can be easily understood can be created.

Further, since the disassembled assembly drawing can be easily created, the assembly procedure data is input, the disassembled assembly drawing is displayed, the assembly procedure defect is found by looking at it, and the assembly procedure data is corrected. There is an effect that the work can be performed with a small amount of time and labor, and an assembly procedure in the product manufacturing process can be easily planned.

[0065]

As described above, according to the present invention, it is possible to automatically create an exploded assembly drawing, and the conventional operation of moving each part by the operator instructing the moving direction and the moving amount. Is unnecessary, and it is possible to reduce the number of steps for creating an exploded view.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an exploded assembly drawing creating apparatus according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of an assembly component moving unit in the embodiment of FIG.

FIG. 3 is a state diagram of an assembly.

FIG. 4 is a diagram for explaining the operation principle of the assembly component moving unit shown in FIG.

5A and 5B are views for explaining the operation principle of the assembly component moving unit shown in FIG.

FIG. 6 is a diagram illustrating a processing procedure of an assembly component moving unit.

FIG. 7 is a state diagram of another assembly.

FIG. 8 is a diagram showing a data structure of assembly procedure data.

9 is a diagram for explaining the operation of the assembling component moving unit for the assembly shown in FIG.

FIG. 10 is a diagram for explaining the operation of the assembling component moving unit for the assembly shown in FIG.

FIG. 11 is a diagram for explaining the operation of the assembly component moving unit for the assembly shown in FIG.

FIG. 12 is a diagram for explaining the operation of the assembling component moving unit for the assembly shown in FIG.

FIG. 13 is an exploded view of the assembly shown in FIG. 7 according to an embodiment of the present invention.

FIG. 14 is a diagram illustrating the operation of the assembling component moving unit for a three-dimensionally shaped assembly.

FIG. 15 is an exploded view based on three-dimensional shape data created according to an embodiment of the present invention.

FIG. 16 is a diagram for explaining the operation of an embodiment of the assembling component moving unit.

17 is an exploded view made according to an embodiment of the present invention shown in FIG.

FIG. 18 is a detailed configuration diagram of an assembling parts moving unit of an exploded assembly drawing creating apparatus according to another embodiment of the present invention.

FIG. 19 is a diagram illustrating an example of a bounding box including a part shape.

FIG. 20 is a configuration diagram of an exploded view drawing creation device according to another embodiment of the present invention.

FIG. 21 is a detailed configuration diagram of the assembly component moving unit shown in FIG. 20.

FIG. 22 is a state diagram of an assembly.

FIG. 23 is a diagram for explaining the operation of the assembling component moving unit shown in FIG. 22.

FIG. 24 is a diagram illustrating an operation of the assembling component moving unit shown in FIG. 22.

FIG. 25 is an exploded view made according to an embodiment of the present invention.

FIG. 26 is a diagram showing a processing procedure of the assembly component moving unit shown in FIG. 22.

FIG. 27 is a detailed configuration diagram of an assembling component moving unit of an exploded assembly drawing creating apparatus according to another embodiment of the present invention.

FIG. 28 is a state diagram of an assembly.

FIG. 29 is a diagram illustrating an example of a contact surface of an assembly.

FIG. 30 is a diagram for explaining the operation of the assembling component moving unit shown in FIG. 27.

FIG. 31 is an exploded view made according to an embodiment of the present invention.

FIG. 32 is a detailed configuration diagram of an assembling part moving unit of an exploded view drawing creating apparatus according to another embodiment of the present invention.

FIG. 33 is a diagram illustrating the principle of creating a corresponding line on a contact surface.

FIG. 34 is an exploded view including corresponding lines created according to an embodiment of the present invention.

FIG. 35 is a diagram illustrating the principle of a method for determining a gap between components based on the line-of-sight direction.

FIG. 36 is a state diagram of an assembly.

FIG. 37 is a diagram showing a data structure of assembly procedure data.

FIG. 38 is an exploded view prepared by the apparatus according to the embodiment of the present invention.

FIG. 39 is a diagram showing a data structure of assembly procedure data.

FIG. 40 is an exploded view prepared by the apparatus according to the embodiment of the present invention.

FIG. 41 is a diagram showing a data structure of assembly procedure data.

FIG. 42 is an exploded assembly view created by the apparatus of one embodiment of the present invention.

FIG. 43 is a process flow chart of a method of creating an exploded view according to an embodiment of the present invention.

FIG. 44 is a process flow chart of the method for creating an exploded view of the embodiment shown in FIG. 18;

45 is a detailed flowchart of step 4407 in FIG. 44.

FIG. 46 is a state diagram of an assembled product.

FIG. 47 is a view in which a bounding box and a half line are added to the assembled product.

FIG. 48 is a diagram showing a state after the arrangement position is determined.

FIG. 49 is a diagram showing shape data of an assembly having a subassembly assembly.

FIG. 50 is a data configuration diagram of assembly procedure data with subassembly assembly.

FIG. 51 is a diagram showing an assembly by a tree structure.

FIG. 52 is a diagram showing a processing procedure of an exploded assembly drawing creation method corresponding to subassembly assembly which is another embodiment of the present invention.

FIG. 53 is a data configuration diagram of a stack for parts to be assembled.

FIG. 54 is a diagram showing an intermediate state of creating an exploded view.

FIG. 55 is a diagram showing a final state of creating an exploded view.

FIG. 56 is a data configuration diagram of assembly procedure data with subassembly assembly.

FIG. 57 is a data configuration diagram of assembly procedure data with subassembly assembly.

FIG. 58 is a diagram showing a processing procedure at the time of editing an assembly procedure on an exploded assembly drawing which is another embodiment of the present invention.

FIG. 59 is a state diagram of an assembly.

FIG. 60 is a data configuration diagram of assembly procedure data.

FIG. 61 is a diagram illustrating an instruction method of assembling procedure editing on an exploded view.

FIG. 62 is a data configuration diagram of assembly procedure data after the assembly procedure is edited.

FIG. 63 is an exploded view of the assembly procedure after editing.

FIG. 64 is a data configuration diagram of assembly procedure data after the assembly procedure is edited.

FIG. 65 is an exploded view of the assembly procedure after editing.

[Explanation of symbols]

101 ... Input device, 102 ... Arithmetic device, 103 ... Storage device, 104 ... Output device, 105 ... Shape data, 106 ...
Assembly procedure data, 107 ... Shape data input program,
108 ... Assembly procedure input program, 109 ... Assembly parts movement program, 110 ... Disassembled assembly display program, 1
11 ... Assembly part data, 112 ... Assembly direction data.

Claims (11)

[Claims] 1. An assembly process data comprising an input section, a shape data memory for storing shape data of parts constituting an assembly, and an arithmetic section for displaying the assembly on the display section based on the shape data. And means for determining the disposition position of the disassembled state of the parts constituting the assembly, based on the shape data, and displaying an exploded view on the display unit according to the determined disposition position. Disassembly and assembly drawing creation device. 2. The exploded assembly drawing creation apparatus according to claim 1, wherein the shape data is a control point of a curve or a curved surface forming a part and a vertex of the part. 3. An assembly process data comprising: an input unit, a shape data memory for storing shape data of parts constituting an assembly, and an arithmetic unit for displaying the assembly on the display unit based on the shape data. Based on the shape data and the shape data, there is provided means for determining an interval between the respective parts when disassembling the parts constituting the assembly on the exploded view, and disassembling according to the determined part interval. A disassembled assembly drawing creating apparatus, which displays an assembly drawing on the display unit. 4. A component having an input section, a shape data memory for storing shape data of parts constituting an assembly, and a calculation section for displaying the assembly on the display section based on the shape data, Means for generating a polyhedron including the shape of the part from the shape data, and disassembling the parts constituting the assembly on the exploded view based on the assembly process data and the generated shape data of the polyhedron. A disassembled assembly drawing creating apparatus, comprising means for determining an interval between the respective parts at the time, and displaying an exploded assembly drawing on the display unit according to the determined part interval. 5. An assembly having an input section, a shape data memory for storing shape data of parts constituting the assembly, and a calculation section for displaying the assembly on a display section based on the shape data. The disassembled assembly view of the parts constituting the assembly based on the line-of-sight direction input means for inputting the line-of-sight direction when displaying the disassembled assembly drawing, and the assembly process data, the shape data, and the input line-of-sight direction data. A disassembled assembly drawing creating apparatus, characterized in that means for determining an interval between the respective parts when the disassembled state is set above is provided, and an exploded assembly drawing is displayed on the display unit according to the determined part interval. . 6. The exploded assembly drawing creating apparatus according to claim 1, wherein the assembly process data includes an assembly order and an assembly direction of the parts. 7. An apparatus having an input section, a shape data memory for storing shape data of parts constituting an assembly, and a calculation section for displaying an assembly on a display section based on the shape data, An assembling process data memory that stores assembling process data including an assembling order and an assembling direction, and an inner product of the vertex coordinates of the part in the shape data memory and the assembling direction vector in the assembling process data memory are calculated, and the inner product is calculated. An inner product minimum value calculating means for obtaining the minimum value of the values, an inner product of the vertex coordinates of the parts and the assembly direction vector, and an inner product maximum value calculating means for obtaining the maximum value of the inner product values, and the obtained inner product Means for determining a difference between the minimum value and the maximum value, and determining an interval between the respective parts when disassembling the parts constituting the assembly on an exploded view based on the calculated difference Provided, it exploded view producing apparatus an exploded view in accordance with the determined parts intervals and displaying on the display unit. 8. The component spacing determination means according to claim 7, wherein a value obtained by adding or subtracting a predetermined gap value to or from the difference between the minimum value and the maximum value of the obtained inner product values is calculated between the components. A disassembled assembly drawing producing device characterized by being determined as an interval. 9. An apparatus comprising an input section, a shape data memory for storing shape data of parts constituting an assembly, and a calculation section for displaying the assembly on a display section based on the shape data, Assembling process data memory for storing assembling process data including an assembling order and an assembling direction, and a shape of a first polyhedron and an attached part including a shape of the assembling part from shape data of the part in the shape data memory And a means for generating a second polyhedron that includes, and a component forming the assembly based on the shape data of the generated first and second polyhedra and the assembly direction vector in the assembly process data memory. A means for determining an interval between the respective parts when disassembled on the exploded view is provided, and an exploded view is displayed on the display unit according to the determined interval between the parts. Exploded view creating apparatus for. 10. An apparatus comprising an input section, a shape data memory for storing shape data of parts constituting an assembly, and a calculation section for displaying an assembly on a display section based on the shape data, An assembling process data memory for storing assembling process data including an assembling order and an assembling direction, and an assembling part and an assembling part based on the shape data of the assembling part and the shape data of the assembling part in the shape data memory. A contact surface detecting means for determining a contact surface with the attachment part, and an inner product of the obtained vertex coordinates of the contact surface and the assembling direction vector in the assembling process data memory to obtain the minimum inner product value. A calculating means, an inner product maximum value calculating means for calculating an inner product of the vertex coordinates of the assembly parts and the assembling direction vector, and obtaining a maximum value of the inner product values, and a minimum of the obtained inner product values. And a maximum value are obtained, and based on the obtained difference, means is provided for deciding an interval between the respective parts when disassembling the parts constituting the assembly on an exploded view, A disassembled assembly drawing producing apparatus, wherein the disassembled assembly drawing is displayed on the display unit in accordance with the separated parts spacing. 11. An input section, a shape data memory for storing shape data of parts constituting an assembly, and a calculation section for displaying the assembly on a display section based on the shape data. In the method for creating an exploded assembly drawing of an assembly, the vertex coordinates of the part are read from the shape data memory, and the assembly direction vector is read from the assembly process data memory that stores the assembly process data including the assembly order and the assembly direction of the parts. , Calculates the inner product of the vertex coordinates of the read component and the assembly direction vector, obtains the minimum inner product value, and calculates the inner product of the vertex coordinates of the read component and the assembly direction vector. , The maximum value of the inner product value is obtained, and based on the obtained difference, the intervals between the respective parts when determining the disassembled state of the parts constituting the assembly on the exploded view are determined, It exploded view creation method and displaying an exploded view of the display unit according to the determined component spacing.