JP3786127B2 - Disassembled assembly drawing creation apparatus and method - Google Patents

Description

  The present invention relates to an apparatus and a method for creating an exploded view created when a structure of an assembly composed of a plurality of parts, an assembly procedure in a manufacturing process, a maintenance check and a repair procedure are shown.

  The exploded view is a drawing in which individual parts are separated from the assembled state and arranged in the assembly order in the direction opposite to the assembling direction. Such an exploded assembly drawing is used when showing the structure of an assembly composed of a plurality of parts, the assembly procedure in the manufacturing process, the procedure of maintenance inspection and repair, and the like. Conventionally, disassembled drawings have been created by handwriting based on assembly procedure manuals showing production drawings such as assembly drawings and parts drawings of products and assembly procedures. In recent years, CAD systems have been used for product design. An assembly model of a product created using a 3D CAD system is created, and the user considers the assembly procedure based on the data created by the 3D CAD system. The exploded assembly drawing is created by moving the parts by the movement command.

  In the above-described prior art, it took a very long time because an exploded assembly drawing was created manually. In addition, if you use the shape data of the assembly created by the 3D CAD system, you do not need to write at least the shape of the part, but the operator moves the parts one by one by specifying the direction and amount of movement. It took time and effort. Further, at the stage where the assembling procedure is considered in the manufacturing preparation stage, it is necessary to confirm whether the assembling procedure is correct by looking at the shape. However, the determination of the assembly procedure involves trial and error, and each time the procedure is changed, there is a problem that it takes a lot of man-hours because the exploded assembly drawings are manually reworked.

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

In order to achieve the above object, the present invention provides a CAD system having a function of displaying an exploded view showing an exploded state of an assembly on a display device, information relating to the assembly direction of assembly parts constituting the assembly, and A storage device for storing information relating to the bounding box of the assembly part constituting the assembly; and information relating to the assembly direction of the assembly part and the bounding box of the assembly part are read from the storage device, and the read assembly In the exploded assembly drawing, the assembly part and the bounding box of the part to be assembled are not overlapped with each other on the basis of the information on the assembly direction of the part to be assembled and the bounding box of the read assembly part. An arithmetic device for calculating the position of the attached part, and storing the position of the assembled part on the exploded view calculated by the arithmetic unit. Apparatus and is characterized in further comprising a display means for displaying an exploded view of the display device based on the position of the assembly parts exploded diagram read from the storage device.

Further, in order to achieve the above object, the present invention provides an exploded assembly drawing display method for displaying an exploded assembly drawing showing a disassembled state of an assembly on a display device, and information relating to the assembly direction of assembly parts constituting the assembly. And a procedure for storing the bounding box of the assembly part constituting the assembly in the storage device, and information on the assembly direction of the assembly component and the bounding box of the assembly component are read from the storage device, and the read assembly Based on the information on the assembly direction of the assembly parts constituting the product and the bounding box of the assembly parts that have been read out, the assembly parts in the exploded view are arranged so that the bounding boxes of the assembly parts and the assembly parts do not overlap. The procedure for calculating the position of the attached part by the arithmetic device and the position of the assembled part on the exploded view calculated by the arithmetic device are stored in the storage device. That the procedure and is characterized in that it comprises a procedure for displaying an exploded view of the display device based on the position of the assembly parts exploded diagram read from the storage device.

According to the present invention, it is possible to automatically create an exploded view, and it is not necessary to perform an operation in which an operator designates a moving direction and a moving amount one by one and moves the components one by one. It becomes possible to reduce the man-hour of creation.

FIG. 1 shows an embodiment of the construction of an exploded assembly drawing creation apparatus according to the present invention. The input device 101 is
A device such as a keyboard and a mouse that receives instructions from a user and a device that receives data from other computers such as a communication device and a storage device. The arithmetic unit 102 is composed of a CPU,
Data in the storage device 103 is calculated or exchanged between the input device 101 and the output device 104 by a program stored in the storage device 103. The storage device 103
It is composed of a RAM, a magnetic disk, etc., and stores programs and data. The output device 104 is configured by a device that delivers data to another computer such as a display device such as a CRT, a communication device, or a storage device.

The storage device 103 stores shape data 105, assembly procedure data 106, shape data input program 107, assembly procedure input program 108, assembly part movement program 109, and exploded assembly drawing display program 110. 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 the geometric information of the assembly from the input device 101 and stores it in the shape data 105. The assembly procedure input program fetches the assembly parts and the assembly direction from the input device 101 for each assembly order and stores them in the assembly procedure data 106. The assembly part movement program 109 calculates the assembly part position on the exploded assembly drawing from the shape data of the assembly part 111, the shape data of the already attached part and the assembly direction 112 in a certain assembly procedure step, The part position of the assembled 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.

The shape data 105 and the assembly procedure data 106 are input by the user using a mouse and a keyboard, or data created by another computer is input via a network or a storage device.

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

FIG. 2 shows a detailed configuration of an embodiment of the assembly part moving program 109. The procedure sequential reading program 201 reads each assembly procedure step in the assembly procedure data 106 and stores it in the assembly part memory 202 and the assembly direction memory 208. Assembly direction 112 is
This indicates the direction when the assembly part is assembled to the already assembled part, and is represented by a unit vector. Let this be V _a . The assembled component memory 204 stores a list of components attached in a procedure step before a certain assembly procedure step. The inner product minimum value calculation program 205 reads a list of assembled parts from the assembled part memory 204, calculates the inner product of the apexes of these parts and the mounting direction, and calculates the minimum value among them. This is _Dmin . The inner product maximum value calculation program 206 reads components to be assembled from the assembly component memory 202 and extracts the coordinate values of the vertices of those components from the shape data 105. Calculate the inner product of these coordinate values and the assembly direction, respectively, and obtain the maximum value. D _max
And The assembly part position change program 207 obtains a movement vector V of the assembly part by the following equation (1). However, D _const has a predetermined amount of clearance.
(Equation 1)
_{V = (D min -D max -D} const) * V a ... (1)
Then, take out the position M _o of the assembled part from the shape data is written to the shape data values M multiplied by the movement matrix Mv calculated from the movement vector V as a new component position. This calculation is based on the following equation (2).
(Equation 2)
M = M _v * M _o (2)
The assembled part addition program 208 adds the assembled part whose position has been changed to the assembled part memory 204.

Next, the principle by which the assembly component moving program 109 creates an exploded view will be described using a specific example.

FIG. 3 shows a state in which two parts 301 and 302 are assembled. Assume that the part 301 is an assembled part and the part 302 is an assembled part. A vector 303 indicates the assembly direction of the part 302. The inner product minimum value calculation program 205 obtains the minimum value of the inner product in the assembling direction 303 and the coordinate value of the vertex of the assembled part 301. In the example of FIG. 3, as shown in FIG. 4, the inner product with the vertex 401 is minimized and the value is 402. That is, the shape of the assembled component 301 exists in an area larger than the minimum value 402 of the inner product when the assembly direction 303 is considered as a number line. On the other hand, in the inner product maximum value calculation program 206, the maximum value of the inner product between the coordinate value of the vertex of the assembly component 302 and the assembly direction 303 is obtained. In the example of FIG. 3, as shown in FIG. 4, the inner product of the vertex 403 and the assembling direction is the maximum, and the value is 404. That is, the shape of the assembly component 302 exists in an area smaller than the maximum value 404 of the inner product when the assembly direction 303 is considered as a number line. Therefore, when the maximum value 404 is subtracted from the minimum value 402, the value becomes 405. When the assembly part is moved in the assembly direction by 405, the assembly of the assembled part 301 and the assembly part 302 is performed. The respective existing areas on the number line in the attaching direction 303 do not overlap. However, since the regions are in contact with each other as they are, the movement amount is 502 when a predetermined amount 501 is subtracted from the value 405 as shown in FIG. When the assembly component 302 is translated in the assembly direction 303 by the movement amount 502, an exploded assembly diagram in which the assembled portion 301 and the assembly component 302 are separated is obtained.

FIG. 6 shows a processing flow of the assembly part moving program. In the process 601, the assembled part of the first procedure step in the assembly procedure data is set as the assembled part. In process 602, processes 603 to 607 are applied sequentially from the second procedure step to the last procedure step. In process 603, the assembly part and assembly direction of the current procedure step are read from the assembly procedure data. In process 604, all vertex coordinates of the assembled part are read from the shape data,
The inner product of each vertex and the assembling direction is calculated, and the maximum value among the values is obtained. In process 605, all 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 among the values is obtained. In 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 from the assembly direction. In process 607, the assembled parts that have been moved and disassembled are added to the assembled parts.

Next, how a disassembled drawing is created by the processing flow of FIG. 6 will be described using a specific example. FIG. 7 shows the shape of the assembly used for explanation. The structure of the assembly is plate 701
A component 702 is fixed to the plate 701 by a bolt 705. The assembly direction of the part 702 and the bolt 703 is a direction vector 706, and the assembly direction of the part 704 and the bolt 705 is a direction vector 707.

The assembly procedure data of the assembly shown in FIG. 7 is, for example, as shown in FIG. The procedure step 801 is a sequence number of the 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 given to the parts in FIG. The assembly direction 803 is a direction vector representing the assembly direction of parts in a certain procedure step. The assembly direction shown in FIG. 8 corresponds to the reference numeral attached to the assembly direction vector of FIG. Note that the first procedure step 804 is the case where a part is placed first, so there is no need to specify the assembly direction.

First, by the process 601, the assembly part 701 in the first procedure step 804 is set as an assembled part. At this stage, the assembled state of FIG. 7 remains. For the sake of explanation, in order to distinguish the assembled component from the assembled component, the assembled component is indicated by shading and the assembled component is indicated by hatching. In the state of FIG. 7, the part 701 is an assembled part. Next, in step 602, steps 603 to 607 are repeatedly applied to procedure steps 2 to 5. When the process 603 is executed in the second procedure step 805, the assembly part becomes 702. This state is shown in FIG. If the processing 604 is executed, the maximum value 901 of the inner product is obtained, and if the processing 605 is executed, the minimum value 902 of the inner product is obtained. When the processing 606 is executed, the difference between the minimum value and the maximum value is 903, and a certain amount of gap is assumed to be 904. A movement vector 905 is obtained, and the position of the moved part 702 is 906.
become. 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 in which processing 603 to processing 607 are being executed in the third procedure step 806. The assembly part is a bolt 703 and the assembly direction vector is 706. When the process 604 is executed, since the assembled part is the bolt 703, the maximum value of the inner product is 1001.
When the process 605 is executed, the assembled parts are the part 701 and the part 702, so the minimum value of the inner product is 1002. A value 1003 obtained by subtracting 1001 from 1002 is obtained. When a value 1005 obtained by subtracting a constant value 1004 from this value 1003 is moved in the assembling direction 706, the position 1006 is obtained. The component 703 becomes an assembled component at a position 1006. Similarly, FIG. 11 shows a state in which processing 603 to processing 607 is being executed in the fourth procedure step 807. In this case, the maximum value and the minimum value of the inner product are the same as 1101 in FIG. Therefore, the movement amount is 1102 corresponding to the gap. Therefore, the position of the component 704 after the movement is 1103.
become. Further, FIG. 12 shows a state in which processing 603 to processing 607 are being executed in the fifth procedure step 808. The maximum value of the inner product between the vertex of the assembly component 705 and the assembly direction 707 is 1201, the minimum value of the inner product between the vertex of the assembled components 701 to 704 and the assembly direction 707 is 1202, and the difference between the minimum value and the maximum value is 1203. , If the gap is 1204, the amount of movement is 1205. Accordingly, the position of the moved component 705 is 1206. FIG. 13 shows the shape data after the processing. By displaying this, an exploded view is obtained.

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

In the above embodiment, the inner product of the vertex of the assembly part and the assembly part and the assembly direction vector is calculated. However, if the part includes a curved surface, the control points of the curve and the curved surface are also calculated by the inner product. If it is the target, it is possible to create a more easily disassembled assembly drawing of parts that contact with a curved surface. In FIG. 16, the assembly part is 1601 and the assembly part is 1602. When the assembly part and the part to be assembled include the curved surface 1603, when calculating the inner product with the assembly direction vector 1609, the control points 1605 and 1606 of the curved surface 1603 are also calculated together with the coordinates of the vertices 1607 and 1608. And As a result, the maximum value of the inner product of the coordinate value of the vertex and the control point of the assembly component 1601 and the assembly direction vector 1609 is the inner product value 1610 of the coordinate value of the vertex 1608 and the direction vector 1609. Also, the minimum value of the inner product of the coordinate value of the vertex of the part to be attached 1602 and the control point and the assembly direction vector 1609 is the inner product value 1611 of the coordinate value of the control point 1605 and the direction vector 1609. A value 1613 obtained by subtracting the gap amount 1612 from the difference between the minimum value 1611 and the maximum value 1610 is the amount of movement of the assembly part 1601. FIG. 17 shows the shape data after movement. In this way, it is not possible to separate all parts including curves and curved surfaces using only the vertex coordinates, but by using the control points of the 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, a vertex of a bounding box that is a polygon including a part shape is used instead of the vertex of the part shape data or the control point. FIG. 18 shows the configuration of the assembly part movement amount calculation program 109 for realizing the present 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 that includes the part shape. 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 each of the vertex coordinates and the assembly direction vector stored in the assembly direction memory 208. Is calculated, and the minimum value is obtained from them. The inner product maximum value calculation program 206 reads 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 each vertex coordinate and the assembly direction memory 208. The inner product with the assembly direction vector is calculated, and the maximum value is calculated from them. The other parts of FIG. 18 are the same as those of FIG.

The bounding box which is a polygon including the part shape is a cube 1902 parallel to the coordinate axis 1901 of the part coordinate system or the assembly coordinate system, for example, as shown in FIG. Such a bounding box has 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 constituting 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 the parts before the movement amount is calculated, 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 becomes unnecessary. Since the bounding box completely includes the part shape, the amount of movement of the assembled part is always larger than the amount of movement calculated using the coordinates of the vertices and control points. Assembly drawings can be created.

Here, the present embodiment using the bounding box will be specifically described below. FIG. 44 is a flowchart showing a procedure for determining the component arrangement on the exploded view. In process 4401, the shape data of the part to be assembled and the arrangement position of the part in the assembled state are fetched. In process 4402, assembly procedure data including data of the assembly order and assembly direction of parts is fetched. In process 4403, the assembled component list, which is a list of assembled components, is emptied, and the first assembled component in the assembly procedure data is set in the assembled component list. In process 4404, processes 4405 to 4409 are repeated in the order of assembly for the second assembled part to the last assembled part of the assembly procedure data. In process 4405, the bounding box of the assembled part is calculated. Next, in processing 4406, a bounding box that includes all parts included in the part list to be assembled is calculated. In process 4407, the amount of movement of the assembled parts such that the bounding boxes are adjacent to each other is calculated from the assembling direction, the bounding box of the assembled part, and the bounding box of the assembled part. 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 part to be assembled that has been moved is added to the list of parts to be assembled.

FIG. 45 shows a detailed flowchart of the process 4407. In process 4501, a half line extending in the direction opposite to the assembling direction is drawn starting from each vertex of the bounding box of the assembling part. In the case of two dimensions, four half lines can be drawn. In the case of 3D, 6 half lines can be drawn. In process 4502, the intersection of the half line created in process 4501 and the bounding box of the part to be assembled is obtained. When one half line has two intersections with the bounding box of the part to be assembled, the point far from the starting point is the intersection. In process 4503, the distance from the starting point to the intersection is calculated for each half line. If there is no intersection, the distance is zero. Processing 4504
Then, the maximum value is selected from the distances obtained in the process 4503, and is set as the movement amount.

An execution example of creating an exploded view according to the present embodiment is shown in FIGS. FIG. 46 is a drawing of a completed state of an assembly for explanation. The structure is such that the bolt 4602 is fixed to the plate 4601. Assume that the bolt 4602 is an assembly part, the plate 4601 is an assembly part, and the assembly direction of the bolt 4602 is 4603. The processing will be described with reference to FIG. 47 showing information such as bounding boxes and half lines used during the calculation. First, in step 4405 and step 4406, a bounding box 4701 for the part to be assembled and a bounding box 4702 for the part to be assembled are calculated. Next, by processing 4501,
Vertex 4703, 4704, 4705, 4706 of bounding box 4702 of assembly part
Then, half straight lines 4707, 4708, 4709, 4710 are drawn in the direction opposite to the assembly direction 4603. Next, by processing 4502, the intersection points 4711, 4712, 4713, 4714 of the half lines 4707, 4708, 4709, 4710 and the bounding boxes 4701 of the parts to be assembled.
Is calculated. Next, the distance between the start point and the intersection point by processing 4503, that is, vertex 4703 to intersection point 4711, vertex 4704 to intersection point 4712, vertex 4705 to intersection point 4713, vertex 4706
~ Intersection 4714 is calculated. Further, in the process 4504, the maximum value of the distance between the start point and the intersection point, that is, the distance between the vertex 4703 and the intersection point 4711 in the case of FIG. FIG.
A state in which the assembly component 4602 is moved in the direction opposite to the assembly direction 4603 by the movement amount 4801 calculated by the processing 4408 is shown. When the movement amount calculated by the processing flow shown in FIG. 45 is used as described above, the assembly component can be arranged at a position where the bounding box of the assembly component and the assembly component does not overlap. And the parts to be assembled can be separated and the parts can be arranged. 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. FIG. 20 is an exploded view drawing creation apparatus of FIG. 1 in which a line-of-sight direction input program 2001 is added, and an assembly part movement program 109 is changed to an assembly part movement program 2002 considering the line-of-sight direction.
Is a functional configuration diagram that is changed to an exploded assembly diagram display program 2003 that displays in the line-of-sight direction input by the line-of-sight direction input program 2001. The line-of-sight direction input program 2001 captures a user instruction from the input device 101 and a line-of-sight vector from another program or computer. The assembly part movement program 2002 considering the line-of-sight direction receives the line-of-sight direction vector from the line-of-sight direction input program 2001, determines the amount of movement of the part 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 written into the shape data.

FIG. 21 shows a configuration diagram of an embodiment of the assembly component moving program 2002 considering the line-of-sight direction. The procedure sequential reading program 201 reads each assembly procedure step in the assembly procedure data 106 and stores it in the assembly part memory 202 and the assembly direction memory 208.
The assembly direction 112 represents a direction when the assembly part is assembled to the already assembled part, and is represented by a unit vector. Let this be V _a . The assembled component memory 204 stores a list of components attached in a procedure step before a certain assembly procedure step. Projection program 2101 to plane the viewing direction and the normal line receives the line-of-sight direction vector V _e from line-of-sight direction input program 2001, also read the assembly direction vector V _a from the assembling direction memory 208, the following formula By (3), the projection vector V _p of the assembling direction vector V _a to the plane having the line-of-sight direction V _e as the normal vector is calculated.
(Equation 3)
V _p = (V _e × V _a ) / | V _e × V _a | × V _e (3)
The inner product minimum value calculation program 2102 reads a list of installed parts from the assembled part memory 204, calculates the inner product of the vertices of these parts and the projection vector V _p , and calculates the minimum value therein. This is _Dmin . The inner product maximum value calculation program 2103 reads components to be assembled from the assembly component memory 202 and extracts the coordinate values of the vertices of those components from the shape data 105. The inner product of these points and the projection vector V _p is calculated, and the maximum value among them is obtained. This is D _max . The assembly part position change program 2104 obtains the movement vector V of the assembly part by the following equation (4). However, D _const has a predetermined amount of clearance.
(Equation 4)
_{V = (D min -D max -D} const) * V a / (V p · V a) ... (4)
Then, the position M _{o of the} assembled part is extracted from the shape data 105, and a value M obtained by multiplying the movement matrix M _v obtained from the movement vector V is written in the shape data 105 as a new part position. )by.
(Equation 5)
M = M _v * M _o (2)
The assembled part addition program 208 adds the assembled part whose position has been changed to the assembled part memory 204.

Next, the principle by which the assembly component movement program 2002 creates an exploded view will be described using a specific example. FIG. 22 shows a state in which two parts 2201 and 2202 are assembled. A part 2201 is an assembled part, and a part 2202 is an assembled part. Vector 2203
Shows the assembling direction V _a part 2202. The line-of-sight vector V _e is a direction from the near side to the far 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. Vector 2301 is a line-of-sight direction vector V _e. Perpendicular direction vector V _t to the plane of FIG. 23, and perpendicular to the line-of-sight direction vector V _e, in order to be perpendicular to the assembling direction vector V _a, line-of-sight direction vector V _e
And a vector obtained by normalizing a vector calculated by the outer product of the assembling direction vectors V _a . Therefore, Vt is calculated _| required by the following formula _| equation (5).
(Equation 6)
_{V t = (V e × V} a) / | V e × V a | ... (5)
However, V _t is the vector 2302 extending from the front to the other side in FIG. 23.

A projection vector V _p of the assembling direction vector V _a onto _a plane having the line-of-sight direction V _e as a normal vector
Is a direction vector 2303 in FIG. Since the projection vector V _p is perpendicular to V _t and perpendicular to the line-of-sight direction V _e , it is a vector calculated by the outer product of V _t and V _e . However,
Since V _t and V _e are orthogonal, it is not necessary to normalize. To summarize the above, the projection vector V _p is obtained by the following equation (6).
(Equation 7)
_{V p = V t × V e} = (V e × V a) / | V e × V a | × V e ... (6)
The inner product minimum value calculation program 2102 obtains the minimum value of the inner product of the coordinate value of the vertex of the mounted part 2201 and the projection vector 2303. In the example of FIG. 22, as shown in FIG. 23, the inner product with the vertex 2304 is minimum, and the value is 2305. On the other hand, in the inner product maximum value calculation program 2103, the maximum value of the inner product between the coordinate value of the vertex of the assembly part 2202 and the projection vector 2303 is obtained. In the example of FIG. 22, as shown in FIG. 23, the inner product of the vertex 2306 and the projection vector 2303 is the maximum, and the value is 2307. Next, when the maximum value 2307 is subtracted from the minimum value 2305, the value becomes 2308. Subtracting a predetermined amount 2309 from the value 2308 yields 2310. Since 2310 is a movement amount on the projection vector, it is necessary to obtain a movement amount such that the result of projection onto the projection vector 2303 in the assembling direction 2203 is 2310. This can be done by dividing the movement amount 2310 in the direction of the projection vector 2303 by the inner product of the projection vector 2303 and the assembling direction vector 2203. In this way, the movement amount 2311 can be calculated. When the assembly component 2202 is translated in the assembly direction 2203 by the movement amount 2311, the result is as shown in FIG. 24, and when viewed from the line of sight, as shown in FIG. 25, the overlapping portion of the assembled part 2201 and the assembly component 2202 Disassembled assembly drawing without the result is obtained.

FIG. 26 shows a processing flow of the assembly part moving program considering the line-of-sight direction. In process 2601, a line-of-sight direction vector is captured from the line-of-sight direction input program. In process 2602, the assembly part of the first procedure step in the assembly procedure data is set as an assembly part. Processing 2603
Then, processing 2604 to processing 2610 are applied sequentially from the second procedure step to the last procedure step. In process 2604, the assembly procedure part and the assembly direction of the current procedure step are read from the assembly procedure data. In process 2605, it is checked whether the line-of-sight direction and the assembling direction are parallel. If they are parallel, the outer product becomes 0, and an error is assumed. In process 2606, the projection assembling direction V _p is calculated by the above equation (6). In process 2607, all vertex coordinates of the assembled part are read out from the shape data, the inner product of each vertex and the projected assembly direction is calculated, and the maximum value among the values is obtained. In process 2608, all vertex coordinates of the assembled parts are read from the shape data, and 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, an assembly component is obtained by subtracting the maximum value from the minimum value and further dividing a value obtained by subtracting a predetermined amount by the inner product of the assembly direction and the projection assembly direction by the vector obtained by multiplying the assembly direction. Move the position. If the movement vector is V, the following equation (4) is obtained.
(Equation 8)
_{V = (D min -D max -D} const) / (V p · V a) * V a ... (4)
However, D _min is the minimum value of the inner product determined in process 2608, D _max is the maximum value of the inner product determined in process 2607, D _const certain amount of clearance values, V _a is assembling direction vector, V _p is Processing 2606
The projection assembling direction vector V _a obtained in step (2) is the assembling direction vector read in step 2604. In process 2610, the assembled parts that have been moved and disassembled are added to the assembled parts.

In this embodiment, the coordinate value of the vertex is used for calculating the inner product 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 the control points, the vertex coordinates of the bounding box which is a polyhedron including the shape of the part may be used.

FIG. 27 shows a detailed configuration 2701 of still another embodiment of the assembly component moving program 109 in FIGS. The procedure sequential reading program 201 is stored in the assembly procedure data 106
Each assembly procedure step is read out and stored in the assembly part memory 202 and the assembly direction memory 208. The assembly direction 112 represents a direction when the assembly part is assembled to the already assembled part, and is represented by a unit vector. Let this be V _a . The assembled component memory 204 stores a list of components attached in a procedure step before a certain assembly procedure step. The contact surface detection program 2702 stores assembly parts in the assembly part memory 202.
The assembled part is read from the assembled part memory 204, and the contact surface between the assembled part and the assembled part is detected with reference to the shape data 105.

The inner product minimum value calculation program 205 takes out the contact surface of the assembled part and the assembled part from the contact surface detection program 2702, calculates the inner product of the apex and the mounting direction, and calculates the minimum value among them. This is _Dmin . The inner product maximum value calculation program 206 reads components to be assembled from the assembly component memory 202, and uses the coordinate values of the vertices of these components as shape data 105.
Take out from. The inner product of those points and the assembly direction is calculated, and the maximum value among them is obtained. This is D _max . The assembly part position change program 207 obtains the movement vector V of the assembly part according to the above equation (1). Then, the position M _{o of the} assembled part is extracted from the shape data, and a value M obtained by multiplying 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). Installed parts addition program 208
Adds the assembled part whose position has been changed to the assembled part memory 204.

Next, the principle by which the assembly component moving program 109 creates an exploded view will be described using a specific example. FIG. 28 shows a state where two parts 2801 and 2802 are assembled. A part 2801 is an assembled part, and a part 2802 is an assembled part. A vector 2803 indicates the assembly direction of the part 2802. First, the contact surface detection program 2702 detects a contact surface between the assembled component 2801 and the assembled component 2802, and obtains a screw seat surface 2901 and a screw surface 2902 as shown in FIG. In the inner product minimum value calculation program 205, the surface 2901
And the minimum value of the inner product of the coordinate value of the vertex of the surface 2902 and the assembling direction 2803. In the example of FIG. 29, as shown in FIG. 30, the inner product of the vertex 3001 of the surface 2901 and the direction vector 2803 is the smallest, and the value is 3002. On the other hand, the inner product maximum value calculation program 206 calculates the inner product between the coordinate value of the vertex of the assembly component 2802 and the assembly direction 2803. In the example of FIG. 28, as shown in FIG. 30, the inner product of the vertex 3003 and the assembling direction 2803 is the maximum, and its value is 3004. Next, when the maximum value 3004 is subtracted from the minimum value 3002, and further a predetermined constant amount 3005 is subtracted, the movement amount becomes 3006. Assembly part 2802 with assembly direction 2803
When moving in parallel by the movement amount 3006, an exploded view in which the assembled portion 2801 and the assembled component 2802 are separated as shown in FIG. 31 is obtained.

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

Next, the configuration of still another embodiment according to the present invention is shown in FIG. FIG. 32 shows a correspondence line creation program 3201 for creating correspondence lines representing correspondences between the contact surfaces of the assembly components and the contact surfaces of the assembled components in the assembly component movement program 2701 having the contact surface detection program of FIG. Is added. The operation of the corresponding line creation program 3201 will be described using FIG. 33 and FIG.
The corresponding line creation program 3201 receives the contact surface from the contact surface detection program 2702, and calculates the center of gravity, for example. In the example of FIG. 33, the contact surface 2901 is transferred from the contact surface detection program 2702, and the center of gravity 3301 is obtained. Also, the assembly part movement vector 3006 is received from the assembly part position change 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. A line segment connecting the points 3301 and 3302 is added to the shape data 105. When this is displayed, as shown in FIG. 34, a corresponding line 3401 indicating 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. The corresponding line 3401 is represented by a one-dot chain line in FIG. 34, but may be displayed in a color or line thickness different from the line representing the shape.

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

FIG. 35 shows an example of a case where the gap between the assembled component and the assembled component is a constant value, and a case where calculation is performed from the line-of-sight direction vector and the assembly direction vector. The line-of-sight direction is a vector 3501. If the part 3502 and the part 3503 are assembled in the assembly direction 3504, the gap is 3505. In this case, since the assembly direction 3504 is perpendicular to the line-of-sight direction 3501, the line-of-sight direction 3501
The apparent gap 3507 viewed from the side is equal to the actual gap 3505. However, when the part 3508 and the part 3509 are assembled in the assembly direction 3510, the gap is 3511 and is the same size as 3505, but the apparent gap 3512 viewed from the line-of-sight direction 3501 is smaller than 3507. When the apparent gap becomes small, the parts approach each other and become difficult to understand as an exploded view. The apparent gap becomes smaller as the assembly direction and the line-of-sight direction become closer to parallel. Therefore, for example, the gap D _const is calculated as in the following equation (7).

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, when the part 3513 and the part 3514 in FIG. 35 are assembled in the assembly direction 3515, the apparent length 3517 of the vector 3516 of length 1 parallel to the assembly direction 3515 is
Since the length of 3518 is the absolute value of the inner product of V _a and V _e , it becomes the denominator of the above equation (7). Therefore, if the gap 3519 is calculated by the above equation (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, the parts cannot be assembled one by one and may not be assembled unless the subassembly in which several parts are assembled is assembled. An embodiment where there is a case will be described. First, FIG. 49 shows an example of such an assembly. The assembly shown in FIG.
It consists of three parts 4902, 4903. In the case of such an assembly, part 4901,
Cannot be assembled in the order of 4902, 4903. First, after the part 4901 is placed, the part 4902 and the part 4903 must be assembled and then assembled to the part 4901.

The assembly procedure data of such an assembly can be expressed as shown in FIG. 50, for example. The part level represents the depth from the route 5101 when the sub-assembly relationship of the assembly is represented by a tree structure as shown in FIG. Therefore, the part level of the part 4901 is 1, the part 4902
The component level of 4903 is 2, and the level of the subassembly in which the components 4902 and 4903 are assembled is 1.

FIG. 52 shows a flowchart of an embodiment of a method for creating an exploded view from assembly sequence data in which there is a subassembly during assembly according to the present invention. In process 5201, shape data consisting of the shape of the parts constituting the assembly and the position of the parts in the assembled state is input. In a process 5202, as shown in FIG. 50, assembly procedure data including an assembly order, assembly parts, assembly direction, and part level is input. In process 5203, the first assembly component of the assembly procedure data is set in the assembly target component list. In the process 5204, the processes after the process 5205 are applied in order from the second assembled part to the last assembled part of the assembly procedure data. In process 5205, it is determined whether or not the assembly part is the first part of the subassembly. For example, when the subassembly is represented at the part level as shown in FIG. 50, if the part level of the assembly part is greater than the part level of the previous assembly part, it becomes the first part of the subassembly. Branches to, and processes 5206 and 5207 are executed. If the part level is the same or is lower than the level of the previous assembly part, the process branches to no and processes 5208 to 5211 are executed. In process 5206, the contents of the current assembly parts list are pushed onto the assembly storage stack. In process 5207, the assembled component list is emptied, and the current assembled component is set in the assembled component list. Through processing 5206 and processing 5207, information on the parts assembled so far is temporarily stored, and preparations for creating an exploded assembly drawing relating to the assembly of the subassembly are completed. In a process 5208, the arrangement position of the assembled part in the disassembled state is calculated from the assembled part, the shape data of the assembled part, and the assembling direction of the assembled part. The calculation method is as described in the previous examples. 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. If the current assembly part is not the last part of the sub-assembly part, the process branches to no and the process 5212 branches. For example, when the subassembly is represented at the part level as shown in FIG. 50, the part level of the current assembly part is 1
When it is greater than the level of the next assembly part, it becomes the last part of the subassembly assembly. In process 5211, the assembly part pushed last on the assembly part storage stack is popped, and the popped parts group is set in the current assembly part list. In process 5212, the part to be assembled is added to the part list to be assembled. After the process 5205 is applied to all assembly parts of the assembly procedure data in the process 5204, the moved shape data is displayed in the process 5213. As a result, an exploded view is displayed.

The stack for storing the part to be assembled is realized by a table including a stack pointer 5301, a part name 5303, and a part number 5302 column as shown in FIG. Stack pointer 5301
Stores the number of parts to be assembled currently stored in the stack. When the assembled parts list is 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 row 5304 shows the number of parts and the part name. Store the list. Conversely, when popping from the stack, the stack pointer 5301
Take out the part name list of the row with the value of as an index, delete that row from the table,
Only one value of the stack pointer 5301 is subtracted. In the example of FIG. 53, since the value of the stack pointer 5301 is 2, the part name C is extracted from the second line 5305, and this line 5305
Is deleted, and the value of the stack pointer 5301 is decremented by 1 to be 1. In this way, a list of component names stored later can be taken out first.

The appearance of the exploded assembly drawing when the processing of FIG. 52 is applied to the data of FIG. 49 and the assembly procedure data of FIG. 50 will be described with reference to the drawings. In processes 5201 and 5202, the shape data diagram 49 and the assembly procedure data diagram 50 are input. Next, when processing 5203 is executed, the assembly part 4901 of the first assembly procedure data in FIG. 50 is set in the assembly part list. The next assembly part 4903 checks in step 5205 whether it is the first part of the subassembly assembly. The level of the previous assembly component 4901 is 1, but the current assembly component 4903 component level is 2.
Thus, since the part level of the current assembly part is larger, it can be seen that this is the first stage of sub-assembly assembly. Therefore, the content of the part list to be assembled, in this case, 4901 is stored in the stack for parts to be assembled by processing 5206. Then, the current assembly part 4903 is obtained by processing 5207.
Is the part to be assembled. Thereafter, the process 5204 is looped, and the assembly part 4902 is processed with the process 5205.
The following applies: First, in processing 5205, it is checked whether it is the first sub-assembly. The part level of the first assembly part 4903 and the part level of the current assembly part 4902 are both 2 and the same. Therefore, since it is not the first part of the sub-assembly assembly, it branches to no and proceeds to processing 5208. Here, the disposition state arrangement position is calculated using the shape data of the assembled component 4902 and the assembly target component 4903 and the assembly direction data of the assembled component 4902. FIG. 54 shows a state in which 4902 is moved in processing 5209 based on the calculation result. Next, in step 5210, it is checked whether it is the end of the subassembly assembly. Since the part level of the part 4902 is 2 and the part level of the next assembly part 4902 + 4903 is 1, it is the last part of the sub-assembly assembly. Therefore, it branches to yes, pops the part 4901 from the assembled part stack, and sets it in the assembled part list. Thereafter, the process 5204 loops, and the process 5205 and subsequent steps are applied to the assembly parts 4902 + 4903. An assembly part 4902 + 4903 indicates that two parts 4902 and 4903 are assembled and assembled. In the process 5205, the part level of the part 4902 + 4903 is 1, the part level of the previous assembly part 4902 is 2, and it is not the first part of the subassembly assembly. So branch to no,
Proceed to step 5208. Here, the positions and shape data of the disassembled states 4902 and 4903 calculated in the previous loop are set as assembly parts, and the part 4901 is set as an assembly part 4902 and 4903.
In step 5209, 4902 and 4903 are moved. This state is shown in FIG. As described above, an exploded assembly drawing of assembly procedure data with sub-assembly assembly can be created.

As an example of assembly procedure data with sub-assembly assembly, an example in which the sub-assembly is expressed at the part level as shown in FIG. 50 is shown. However, as shown in FIG. 56, a flag indicating whether or not there is sub-assembly assembly is provided in the assembly procedure data. When the flag is 0, the subassembly is not assembled. When the flag is 1, the subassembly is assembled. The assembly procedure of the subassembly assembly is expressed by preparing other assembly procedure data as shown in FIG. The correspondence between the assembly part 4904 with sub-assembly assembly and the assembly procedure data of sub-assembly assembly is the same as the assembly part name and sub-assembly name by storing the sub-assembly name in the assembly procedure data. You can take action by checking. When such assembly procedure data is expressed, it is determined whether or not the sub-assembly is the first time when the sub-assembly flag is 1. Further, the assembly procedure data having the same subassembly name as the part name to be assembled is retrieved, and the first part to be assembled is set as a new part to be assembled. Whether or not the sub-assembly assembly is the end is determined by whether or not the end of the assembly order data has been reached.

Next, using a specific example, a state in which the assembly procedure of the assembly is created by the exploded assembly drawing creation apparatus shown in FIG. FIG. 36 shows the structure of an assembly used for explanation. The assembly includes a part 3601, a part 3602, a part 3603, and a part 3604. FIG. 37 shows an example of the assembly procedure input by the user. This involves placing part 3601 first, then attaching part 3602 from above, then attaching part 3603 from the side, and finally part 3604.
Is attached from above. FIG. 37 shows an exploded assembly drawing created by the exploded assembly drawing creation apparatus according to the present invention. The user who sees FIG. 37 tries to attach the part 3603 from the side, but understands that the part 3601 is in the way and cannot be attached. Since the part 3603 can only be attached to the part 3601 from above, the user gives an instruction to the assembly procedure input program 108 and changes the attachment direction 3901 of the part 3603 to attachment from above as in the assembly procedure of FIG. Based on the assembly procedure of FIG. 39, the assembly part moving program 109 is started to create an exploded assembly diagram, and an exploded assembly diagram display program 110 is created.
Is displayed as shown in FIG. Referring to FIG. 40, since the user attaches the part 3602 after attaching the part 3602, it can be seen that the part 3602 becomes an obstacle and the part 3603 cannot be attached. Therefore, the user gives an instruction to the assembly procedure input program 108, and the assembly procedure step 4101 of the component 3603 is performed as the component 3602 as in the assembly procedure of FIG.
It changes before the assembly procedure step 4102. FIG. 42 shows an exploded assembly diagram created by starting the assembly part moving program 109 based on the assembly procedure of FIG. 41 and displayed by the exploded assembly diagram display program 110. It can be seen from FIG. 42 that there is no problem that parts collide during assembly. In this way, the correct assembly procedure can be obtained by repeatedly inputting the assembly procedure and creating an exploded assembly drawing.

Here, FIG. 58 shows an example of a method for changing the assembly procedure using the exploded view according to the present invention. In a process 5801, shape data consisting of the shape of a part constituting an assembly for creating an exploded assembly drawing and the part position in an assembled state is input. In process 5802, assembly procedure data including an assembly order, assembly parts, and 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 part shape is displayed at the part position in the disassembled state calculated in process 5803, and is displayed as an exploded view. In process 5805, the user is inquired whether there is a change in the assembly procedure. The user inputs whether or not it is necessary to change using an input device such as a keyboard or a mouse. If no change is necessary, the procedure change process is terminated. When a change is necessary, processing 5806 is executed. Process 5806
Then, the user is inquired of a procedure change instruction. The user inputs a part that needs to be changed and the contents of the change using a keyboard or a mouse. Instruct a plurality of parts to be changed, and process 5807
Then, 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. As another example, after sequentially instructing a plurality of parts to be changed, there is an instruction to insert a procedure in the order instructed before or after the separately designated parts.

59 to 63 show execution examples of the assembly sequence editing method shown in FIG. FIG. 59 shows an example of shape data input in the process 5801. In this example, the assembly is part 5901,
It consists of four parts 5902, 5903, 5904. FIG. 60 is an example of assembly procedure data input in process 5802. In this assembly procedure data, the part 5901 is first placed, then the part 5902 is assembled from the −Y axis direction, and then the part 5903 is assembled from the −Y axis direction.
Finally, an assembly procedure for assembling the component 5904 from the -Y direction is shown. FIG. 61 is an exploded view generated by processing 5801 and processing 5804. In step 5805, an assembling procedure change menu 6101 is displayed, and the user selects the replacement command 6102 with a mouse, for example. As a result, control is passed to process 5806, and a change instruction is input. For example, in the case of a replacement command, two parts 5903 and 5904 are designated. Then, the order of the parts 5902 and 5903 in the assembly procedure data is switched by processing 5807. FIG. 62 shows the assembly procedure data after the change. FIG. 63 shows the result of calculating the arrangement position in the process 5803 using the assembly procedure data after the change and the shape data input in the process 5801 and displaying it in the process 5804. After the changed exploded view is displayed, an assembly procedure change menu 6101 is displayed again by processing 5805. Here, when the user selects the move command 6103, a change instruction is input by processing 5806. In the case of a move command, the part to be sequentially moved and the part to be moved are instructed on the exploded assembly drawing, and the menu is used to instruct whether to move before or after the part to be moved. For example, in FIG. 63, the part 5903 and the part 5904 are instructed as the order change parts, and then 5902 is instructed as the destination part. Then, select “Previous” from the menu 6301. In process 5807, in accordance with the change instruction input in process 5806, the part 5903 and the part 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 assembling procedure data of FIG. 64 and the shape data and the arrangement data of FIG. 59, the arrangement position is calculated in the process 5803 and displayed in the process 5804, whereby an exploded assembly diagram as shown in FIG. 65 is obtained. In step 5805, the menu 6101 is displayed. When the user does not need to change the assembly order any more, the end 6104 is selected to end the editing process.

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

As described above, according to the embodiment of the present invention, if there is at least shape data and assembly procedure data, an exploded assembly drawing can be automatically created, which has the effect of reducing the number of steps for creating the exploded assembly drawing.

Also, by using the bounding box vertices that contain the part shape instead of the part shape vertices and control points, it is only necessary to calculate the inner product of at most six vertices and the assembly direction vector for one part. There is an effect that an exploded assembly drawing can be created at high speed.

Furthermore, by using the line-of-sight direction of the exploded assembly drawing for calculating the amount of movement of the assembled parts, it is possible to create a figure that does not appear to overlap each other in the exploded assembly drawing, so that an easy-to-understand exploded assembly drawing can be created. There is an effect.

In addition, it is easy to understand the disassembled assembly drawing because it is possible to create a diagram with evenly spaced parts in the exploded assembly drawing by using the line-of-sight direction of the exploded assembly drawing to calculate the amount of movement of the assembled parts. There is an effect that can be created.

In addition, since the contact surfaces in the assembled state can be connected with a line on the exploded assembly drawing, there is an effect that an exploded assembly drawing in which the assembly direction is easy to understand can be created.

In addition, since it is easy to create an exploded assembly drawing, there are few tasks such as inputting assembly procedure data, displaying the exploded assembly drawing, looking at it, finding defects in the assembly procedure, and correcting the assembly procedure data. This is possible because it is possible to make an assembly procedure in the product manufacturing process.

It is a block diagram of the exploded assembly drawing preparation apparatus which is one Example of this invention. It is a detailed block diagram of the assembly | attachment components moving part in the Example of FIG. It is a state figure of an assembly. It is a figure explaining the principle of operation of the assembly component moving part shown in FIG. It is a figure explaining the principle of operation of the assembly component moving part shown in FIG. It is a figure showing the process sequence of an assembly component moving part. It is a state figure of another assembly. It is a figure showing the data structure of assembly procedure data. It is a figure explaining operation | movement of the assembly | attachment component moving part with respect to the assembly shown in FIG. It is a figure explaining operation | movement of the assembly | attachment component moving part with respect to the assembly shown in FIG. It is a figure explaining operation | movement of the assembly | attachment component moving part with respect to the assembly shown in FIG. It is a figure explaining operation | movement of the assembly | attachment component moving part with respect to the assembly shown in FIG. FIG. 8 is an exploded view of the assembly shown in FIG. 7 created according to an embodiment of the present invention. It is a figure explaining operation | movement of the assembly | attachment component moving part with respect to the assembly of a three-dimensional shape. It is an exploded view based on the three-dimensional shape data created according to an embodiment of the present invention. It is a figure explaining operation | movement of one Example of an assembly component moving part. FIG. 17 is an exploded view created according to the embodiment of the present invention shown in FIG. 16. It is a detailed block diagram of the assembly | attachment components moving part of the exploded assembly drawing preparation apparatus which is another Example of this invention. It is a figure showing an example of the bounding box containing a component shape. It is a block diagram of the exploded assembly drawing preparation apparatus which is another Example of this invention. It is a detailed block diagram of the assembly | attachment components moving part shown in FIG. It is a state figure of an assembly. It is a figure explaining operation | movement of the assembly | attachment components moving part shown in FIG. It is a figure explaining operation | movement of the assembly | attachment components moving part shown in FIG. It is the exploded assembly figure created by one Example of this invention. It is a figure showing the process sequence of the assembly | attachment components moving part shown in FIG. It is a detailed block diagram of the assembly | attachment components moving part of the exploded assembly drawing preparation apparatus which is another Example of this invention. It is a state figure of an assembly. It is a figure showing the example of the contact surface of an assembly. It is a figure explaining operation | movement of the assembly component moving part shown in FIG. It is the exploded assembly figure created by one Example of this invention. It is a detailed block diagram of the assembly | attachment components moving part of the exploded assembly drawing preparation apparatus which is another Example of this invention. It is a figure explaining the principle which creates the corresponding line of a contact surface. FIG. 3 is an exploded view including corresponding lines created according to an embodiment of the present invention. It is a figure explaining the principle of the method of determining the clearance gap between components by a gaze direction. It is a state figure of an assembly. It is a figure showing the data structure of assembly procedure data. It is the assembly drawing created with the apparatus of one Example of this invention. It is a figure showing the data structure of assembly procedure data. It is the assembly drawing created with the apparatus of one Example of this invention. It is a figure showing the data structure of assembly procedure data. It is the assembly drawing created with the apparatus of one Example of this invention. It is a processing flow figure of the disassembled assembly drawing preparation method which is one Example of this invention. FIG. 19 is a process flow diagram of the exploded assembly drawing creation method of the embodiment shown in FIG. 18. FIG. 45 is a detailed flowchart of step 4407 in FIG. 44. It is a state figure of an assembly product. It is the figure where the bounding box and the half line were added to the assembly. It is a figure showing the state after arrangement | positioning position determination. It is a figure which shows the shape data of the assembly with a subassembly assembly. It is a data block diagram of the assembly procedure data with a subassembly assembly. It is the figure which expressed the assembly by the tree structure. It is a figure showing the process sequence of the exploded assembly drawing preparation method corresponding to the subassembly assembly which is the other Example of this invention. It is a data block diagram of a stack for assembled parts. It is a figure showing the intermediate state of preparation of exploded assembly drawing. It is a figure showing the final state of decomposition assembly drawing preparation. It is a data block diagram of the assembly procedure data with a subassembly assembly. It is a data block diagram of the assembly procedure data with a subassembly assembly. It is a figure showing the process sequence at the time of editing the assembly procedure on the exploded assembly drawing which is another Example of this invention. It is a state figure of an assembly. It is a data block diagram of assembly procedure data. It is a figure explaining the instruction | indication method of the assembly procedure edit on an exploded assembly drawing. It is a data block diagram of the assembly procedure data after an assembly procedure edit. It is an exploded view after assembly procedure editing. It is a data block diagram of the assembly procedure data after an assembly procedure edit. It is an exploded view after assembly procedure editing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Input device, 102 ... Arithmetic device, 103 ... Memory | storage device, 104 ... Output device, 105
... shape data, 106 ... assembly procedure data, 107 ... shape data input program, 108 ...
Assembly procedure input program, 109 ... assembly part movement program, 110 ... exploded assembly drawing display program, 111 ... assembly part data, 112 ... assembly direction data.

Claims (4)

In a CAD system having a function of displaying an exploded view showing an exploded state of an assembly on a display device, information on an assembly direction of an assembly part constituting the assembly and a bounding box of the assembly part constituting the assembly Information relating to the assembly direction of the assembly component and the bounding box of the assembly component are read from the storage device, and information relating to the assembly direction of the assembly component constituting the read assembly And an arithmetic unit for calculating the position of the assembly part on the exploded view so that the assembly part and the bounding box of the assembly part do not overlap based on the read bounding box of the assembly part Prepared,
A storage device for storing the position of the assembly part on the exploded assembly drawing calculated by the arithmetic device, and the exploded assembly drawing on the display device based on the position of the assembly part on the exploded assembly drawing read from the storage device A CAD system comprising display means for displaying.   The CAD system according to claim 1, wherein the arithmetic unit calculates a position where the assembly component is moved in a direction opposite to an assembly direction.   In an exploded assembly drawing display method for displaying an exploded assembly drawing showing a disassembled state of an assembly on a display device, information on an assembly direction of an assembly part constituting the assembly, and a bounding box of the assembly part constituting the assembly, Storing information in the storage device, information from the storage device regarding the assembly direction of the assembly component and the bounding box of the assembly component, and information regarding the assembly direction of the assembly component constituting the read assembly , Based on the read bounding box of the assembly part, a procedure for calculating the position of the assembly part on the exploded assembly drawing by an arithmetic unit so that the bounding box of the assembly part and the assembly part does not overlap; A procedure for storing the position of the assembly part on the exploded view calculated by the arithmetic device in the storage device; and reading from the storage device Exploded view display method characterized by comprising the steps of displaying an exploded view of the display device based on the position of the assembly parts exploded diagram was.   In Claim 3, When calculating the position of the assembly | attachment components on an exploded assembly drawing with the said arithmetic device, the said arithmetic device calculates the position which moved the said assembly component to the direction opposite to an assembly direction. Disassembled assembly drawing display method.

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