JP2002099581A - Common jig design support device and common jig design support method - Google Patents

Abstract

(57) [Problem] To easily and efficiently design a jig that can be commonly used for a plurality of parts having different shapes. SOLUTION: A three-dimensional model of a plurality of parts having different shapes is created using a part design CAD (S1), and data of the three-dimensional model is stored in a memory (S2). The jig design CAD reads out the data of the three-dimensional models of the plurality of parts from the memory (S3), and displays the three-dimensional models on the screen of the display device based on predetermined feature points of the shape of each part. (S4). If a common part exists in the three-dimensional model of all parts (S5;
Y), a common part is extracted and displayed on the screen (S6). If there is no common part in the three-dimensional model of all parts (S5; N), the parts having the common part are grouped (S7), and the common part for each group is displayed on the screen (S8). Thereafter, the common jig is designed using the three-dimensional model of the superposed parts and the data of the common part (S9).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a common jig design support apparatus and a common jig design support method for supporting the design of a jig that can be commonly used for a plurality of parts having different shapes.

[0002]

Conventionally, jigs (fixtures, fixtures, chucks, robot hands, and inner materials for fixing parts) used for processing, assembling, positioning, etc. of parts (products) have been used. ) Is designed using, for example, a CAD system. In this case, a jig is generally designed on a one-to-one basis from the shape of each component.

However, in designing and manufacturing a jig one-to-one for each kind of component, a new jig design is required even for a component having a similar shape having only a slight difference in shape and dimensions. Is required, and the number of jigs is increased unnecessarily, which leads to an increase in cost and a deterioration in setup of processing. Therefore, it is required to use a common jig that can be used in common for a plurality of parts having different shapes, and accordingly, it is desired to develop a support device and a support method that can easily design the common jig. It is done.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily and efficiently design a jig that can be used in common for a plurality of parts having different shapes. An object of the present invention is to provide a common jig design support apparatus and a common jig design support method.

[0005]

In order to design a common jig that can be used in common for a plurality of parts having different shapes by using, for example, three-dimensional CAD, it is necessary that each part does not interfere with the common jig. In addition, it is necessary to have a shape necessary and sufficient for holding each part which is a function inherent to the jig. In designing such a common jig, it is very important to recognize which parts are common in the shape of each part, and at this time, the common part is completely three-dimensionally It must be consistent.

According to a first aspect of the present invention, there is provided a common jig design supporting apparatus for reading out a three-dimensional model of a plurality of parts from a storage means for storing the three-dimensional models of the plurality of parts by a display control means. The display is configured to be superimposed on the screen of the display device based on the characteristic points. According to this, a three-dimensional model representing the three-dimensional shape of each part is displayed in a superimposed manner on the screen of the display device, and the superimposition is performed based on predetermined feature points of the part shape. Therefore, it is possible to recognize a common part necessary for designing a common jig from the screen. As a result, it is possible to easily and efficiently design a jig that can be commonly used for a plurality of components having different shapes.

In this case, a three-dimensional model of a plurality of parts is
If the configuration is such that the parts are displayed in different colors on the screen (the invention of claim 2), the common part having the shape of each part is displayed in a different color from the color of the parts that do not have the same shape. Recognition can be easily performed.

In addition, a part having a common shape is extracted from an image in which three-dimensional models of a plurality of parts are superimposed and displayed,
By providing the common part extracting and displaying means for displaying on the screen (invention of claim 3), the common part can be more easily recognized and the design of the common jig can be facilitated based on the extracted common part. Will be able to do it.

Further, at this time, if there is no common part in the three-dimensional model of all parts, the grouping means groups the parts having the common part and displays the common part for each group on the screen. (The invention of claim 4). According to this, the common part for each group can be easily recognized, and the design of the common jig that can hold the common part for each group can be easily performed.

According to a fifth aspect of the present invention, there is provided a common jig design support method, wherein a three-dimensional model of a plurality of parts is created and stored in a storage means, and the three-dimensional models of the plurality of parts are read out from the storage means. Is superimposed and displayed on the screen of the display device with reference to a predetermined feature point of the shape of each component. According to this, a three-dimensional model representing the three-dimensional shape of each part is displayed in a superimposed manner on the screen of the display device, and the superimposition is performed based on predetermined feature points of the part shape. Therefore, it is possible to recognize a common part necessary for designing a common jig from the screen. As a result, it is possible to easily and efficiently design a jig that can be commonly used for a plurality of components having different shapes.

In this case, a three-dimensional model of a plurality of parts is
If they are displayed on the screen in different colors, respectively (claim 6
Invention), since the common part having the shape of each component is displayed in a color different from the color of the other part, the common part can be easily recognized.

In addition, a part having a common shape is extracted from an image in which three-dimensional models of a plurality of parts are superimposed and displayed,
If the common part is displayed on the screen (the invention of claim 7), the common part can be more easily recognized, and the common jig can be easily designed based on the extracted common part. Become.

Further, at this time, when there is no common part in the three-dimensional model of all parts, it is possible to group the parts having the common part and to display the common part for each group on the screen ( According to the eighth aspect of the present invention, it is possible to easily recognize a common part for each group, and to easily design a common jig capable of holding a common part for each group. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to the design of a jig for holding a part when polishing the inner surface of a hole of the part will be described below with reference to the drawings. . FIG. 2 schematically illustrates an example of a common jig design system used in the present embodiment. This system includes, for example, a plurality of component designs CAD1, and a memory (database) connected to these component designs CAD1. 2 and
A jig design CAD 3 connected to the memory 2 is provided. This system executes the common jig design support method according to the present embodiment, and includes the common jig design support apparatus according to the present embodiment.

The part design CAD 1 is for creating a three-dimensional model of each part (specific examples will be described later) together with necessary processing information. Although not shown in detail, a computer such as a personal computer or a work station, and a display. It is provided with a man-machine interface such as a device and an input device. And each part design C
The data of the three-dimensional model of each component created by the AD 1 is sent to the memory 2 and stored therein.
Therefore, the memory 2 functions as a storage unit.

On the other hand, the jig design CAD 3 creates a three-dimensional model of a jig (a common jig that can be commonly used for a plurality of parts having different shapes) to be described later together with necessary processing information. , A computer, a display device, an input device (all not shown), and the like. At this time, the display device is composed of, for example, a CRT display capable of full color display, and its screen 4 (FIGS.
3), it is possible to display a three-dimensional model of a part or a jig. The jig design CAD 3 (computer) can read out data of a three-dimensional model of each part from the memory 2.

As will be described later in a specific example, the operation of the jig design CAD 3 (computer) is performed by an operator (designer) using a software configuration to design a common jig. In this case, a step of reading a three-dimensional model of a plurality of parts from the memory 2 and displaying the three-dimensional models on the screen 4 of the display device by superimposing the three-dimensional models on the basis of a specified characteristic point of the shape of each part is executed. It has become.

Then, a portion having a common shape (completely three-dimensionally in this embodiment) is extracted from an image in which three-dimensional models of a plurality of parts are superimposed and displayed, and a common portion displayed on the screen 4 is displayed. An extraction display step is performed. In this case, the common part is displayed by changing the color or pattern from the other parts.

Further, in the present embodiment, if there is no common part in the three-dimensional model of all parts, the parts having the common part are grouped based on the input design conditions, and The common part is displayed on the screen 4. Therefore, this jig design CAD3
(Computer) functions as display control means, common part extraction and display means, and grouping means.

Thereafter, the operator can use the three-dimensional model of the plurality of superimposed parts and the information on the common part so that the operator can commonly use the plurality of parts, that is, each part and the jig do not interfere with each other. In addition, a common jig having a shape necessary and sufficient to hold each component, which is an original function of the jig, is designed. As will be described later in the description of the operation, when parts are grouped without a common part of all parts, a common jig is provided for the jig main body and for each group. A plurality of attachments (cores) are detachably attached to the jig body.

Next, the operation of the above configuration will be described with reference to FIG. 1 and FIGS. Here, a specific example of a part will be described with reference to FIG.
The upper part (head) has a cylindrical shape having a stepped portion 5a having a large diameter at the upper portion and a smaller diameter at the lower side, and a hole 5b penetrating vertically is formed at the center thereof. In this case, hole 5
The functions (design conditions) required for the jig for holding the part 5 when the inner surface of the part b is polished include XY of the part 5.
The movement in the plane can be restricted, and the vertical direction (Z direction)
Can be supported.

FIG. 4 (a) shows the part 5 and the parts 6, 7, 8 of the same kind but different in shape.
(Shape viewed from the front for convenience). Each of these parts 6, 7, and 8 also has a cylindrical shape having stepped portions 6a, 7a, and 8a each having an upper portion having a larger diameter and a lower portion having a smaller diameter. It has a hole to make. These parts 5 to 8 are different from each other in the diameter or length (height) of each part (the outer shape of the upper part (head) of the part 6).

The flowchart of FIG. 1 shows the procedure of designing a common jig which can be used in common for a plurality of parts. Hereinafter, the common jig will be used for holding the above-mentioned four types of parts 5 to 8. When designing a possible common jig (Figs. 3 to 6)
Is described as a specific example. That is, first, step S
In 1, a step of creating a three-dimensional model of the plurality of parts 5 to 8 using the part design CAD 1 is executed.
In the next step S2, a step of storing the data of the three-dimensional models of the plurality of parts 5 to 8 created in each part design CAD1 in the memory 2.

The following step S3 and subsequent steps are processing executed by the jig design CAD 3. In step S3, first, data of a three-dimensional model of a plurality of parts 5 to 8 is stored in the jig design CAD 3 from the memory 2. , And in step S4, the three-dimensional model is
A step of superimposing and displaying the image on the screen 4 of the display device based on the predetermined characteristic point of the shape is performed.

In the case of the four parts 5 to 8 shown in FIG. 4A, a display as shown in FIG. 4B is made on the screen 4 of the display device. Note that the three-dimensional model is actually superimposed and displayed. However, in order to avoid complicating the drawing, the three-dimensional model is replaced with the two-dimensional display for convenience. At this time, the predetermined feature points serving as a reference for superposition include the lower surfaces (downward facing surfaces) of the stepped portions 5a to 8a of the components 5 to 8.
And the center axis o is designated, so that the lower surfaces of the stepped portions 5a to 8a of the parts 5 to 8 are aligned at the same height, and the tertiary axes o of the parts 5 to 8 are matched. The superimposed display of the original model is performed.

In the next step S5, all parts 5-8
It is determined whether or not there is a common part whose outer shape is common (three-dimensionally completely matched) in the three-dimensional model.
If a common part exists in the three-dimensional model of all parts 5 to 8 (Yes in step S5), a step of extracting the common part and displaying it on the screen 4 is executed in step S6. On the other hand, if there is no common part in the three-dimensional model of all parts 5 to 8 (No in step S5), grouping is performed for each part having the common part in step S7, and subsequently, In step S8, a step of displaying the common part for each group on the screen 4 is executed.

In the example shown in FIG. 4, the presence or absence of a common part is determined based on whether or not a part having the same outer diameter exists at the same position from an image in which the three-dimensional model is superimposed and displayed. No common site exists (S5;
N), grouping is performed in which portions having the same outer diameter exist at the same position (S7). Here, as shown in FIG. 5 (a), for the parts 5 and 7, since the outer diameters of the small diameter portions are the same at L2, the hatched portions can be extracted as the common portion a. The part 5 and the part 7 form one group A.

Although not shown in detail, the parts 6 and 8 also have the same outer diameter of the small diameter part, so that a common part b (see FIG. 5B) can be extracted, and these parts can be extracted. One group B is set. The screen 4 of the display device has four parts 5 to 5 as shown in FIG.
The eight three-dimensional models are divided and superimposed on groups A and B, and the common parts a and b of the respective groups A and B are displayed together (S8).

The common parts a and b are displayed by, for example, changing the color and pattern from the other parts, but are shown with diagonal lines for convenience. Although not shown, if there is a common part for all parts (S5; Y), the common part is similarly extracted, and other parts in the superimposed image of the three-dimensional model are extracted. Is displayed by changing the color or pattern (S
6).

As described above, the superimposed images of the three-dimensional models of the parts 5 to 8 are displayed on the screen 4 of the display device, and the common parts a and b are displayed (display of the common parts after grouping). Is performed, the operator can use the screen 4 to display common parts a and b necessary for designing a common jig.
Can be easily recognized. Thereafter, in step S9, the superposed components 5 to 5
The common jig is designed using the jig design CAD 3 using the three-dimensional model 8 and the data of the common parts a and b.

FIG. 6 shows an outline of a method of designing the common jig 9 for the components 5 to 8 described above. In this case, as described above, when designing the common jig 9, it is necessary and sufficient to hold each of the parts 5 to 8 which is the original function of the jig without interfering with any of the parts 5 to 8. In order to realize the function, specifically, the movement of the parts 5 to 8 in the XY plane by holding the outer circumference of the small diameter part of each of the parts 5 to 8 Restrained,
In addition, a concept is adopted in which the lower surfaces of the stepped portions 5a to 8a of the components 5 to 8 are held at a predetermined height to support in the vertical direction (Z direction).

In this embodiment, the parts 5 to 8 are:
Since it is divided into groups A and B by the common parts a and b, one jig body 10 and a ring-shaped core 1 provided for each group and detachably attached to the jig body 10
1 (only one is shown). The ring-shaped core 11 is designed to hold the common portions a and b, respectively. As shown in FIG. 6A, the outer shape of the jig main body 10 is determined in advance by equipment or the like.

First, as shown in FIG. 6B, the shape of the jig body 10 and the superimposed images of the three-dimensional models of the parts 5 to 8 are used to prevent the jig body 1 from interfering with each other.
Although the internal shape of 0 is determined, here, the jig body 10 is designed so that the inside thereof has a two-stepped shape. In this case, in the upper part (upper part 10a) of the jig body 10, the inner diameter becomes maximum (does not interfere with the part 6 having the largest outer diameter of the large diameter part), and the lower part (middle part 10b) has a ring shape. The inner diameter and the height at which the core 11 is fitted are set to the smallest inner diameter that does not interfere with the small-diameter portions of all the components 5 to 8 at the lowermost portion (the lower step portion 10c).

The ring-shaped core 11 corresponding to the group A is, as shown in FIG.
From the circular plate (thin column) 12 having an outer diameter and a height dimension fitted (locked) to 0b, the ring shape excluding the common part a, that is, the inner diameter corresponding to the outer diameter L2 of the common part a is determined. It is designed to have a ring shape. Although not shown, the ring-shaped core corresponding to the group B is also designed in a ring shape excluding the common part b from the equivalent disk 12.

Thus, the common jig 9 is composed of one common jig 10 and two types of ring-shaped cores 11, and FIG.
As shown in (d), the jig body 10 (middle step 10b)
In addition, the ring-shaped core 11 corresponding to the group A is detachably attached, so that the components of the group A, that is, the components 5,
7 can be held, and the parts of the group B, that is, the parts 6, 8 can be held by detachably attaching the ring-shaped core corresponding to the group B.

As described above, according to this embodiment, the common jig 9 can be used in common for a plurality of parts 5 to 8 having different shapes.
Is designed to superimpose and display a three-dimensional model of a plurality of parts 5 to 8 on the screen 4 of the display device.
Can be easily recognized. As a result,
This has an excellent effect that it is possible to easily and efficiently design the common jig 9 that can be commonly used for a plurality of components 5 to 8.

In the above embodiment, a part whose shape is completely three-dimensionally common is extracted as a common part from a three-dimensional model of a plurality of parts. If there is a shape match that satisfies the constraint conditions (restriction in the X and Y directions and support in the Z direction) required for the jig design, this can be used as a common part. For example,
A common part can also be used when a large-diameter part of a part has a circular shape and a large-diameter part of another part has an elliptical shape (oval shape) having the same long axis.

In the above embodiment, the common jig 9 is used so that the lower surfaces of the stepped portions 5a to 8a of the components 5 to 8 are aligned at a predetermined height position. If the height differs depending on the height direction, a multi-stepped portion may be formed inside the common jig (jig body). For example, in the case of two groups, the components of one group may be held by the jig body without using the ring-shaped core, and the core may be used for the other group. When a common part exists for all parts, it is a matter of course that a common jig can be formed without using a core or the like.

In the above embodiment, the common part is extracted from the image in which the three-dimensional models of a plurality of parts are superimposed and displayed, and the display is performed so as to be distinguished from other parts. The three-dimensional model may be displayed on the screen in different colors, and according to this, the common part of the shape of each part is displayed in a different color from the color of the part that is not. In addition, the common part can be easily recognized without separately performing the common part extraction processing.

In addition, the present invention is not limited to the above-described embodiment. For example, the jig in the present invention includes a fixture, a fixture, a chuck, a robot hand, and an inner material for fixing parts. In addition, the parts may include various products, and may be appropriately changed and implemented without departing from the gist.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure of designing a common jig, showing an embodiment of the present invention.

FIG. 2 is a block diagram schematically showing an entire configuration of a jig design system.

FIG. 3 is a perspective view showing an example of a component.

FIG. 4 is a diagram showing shapes (a) of four parts and an example (b) in which they are superimposed and displayed.

FIG. 5 is a diagram for explaining a method of grouping and extracting a common part.

FIG. 6 is a diagram for explaining a method of designing a common jig.

[Explanation of symbols]

In the drawing, 1 is a part design CAD, 2 is a memory (storage means), 3 is a jig design CAD (display control means, common part extraction display means, grouping means), 4 is a screen, 5 to 8 are parts, 9 Denotes a common jig, 10 denotes a jig main body, 11 denotes a ring-shaped core, and a and b denote common parts.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ryoji Nagashima 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 5B046 AA05 DA02 FA06 FA18 GA01 GA04 HA09 5B050 AA03 BA09 BA18 EA18 EA19 EA28 FA02 FA05 FA17

Claims (8)

[Claims] An apparatus for supporting the design of a jig commonly used for a plurality of parts having different shapes, comprising: a display device capable of displaying a three-dimensional model; Storage means for storing a model, reading a three-dimensional model of a plurality of parts from the storage means,
A common jig design support device, comprising: display control means for superimposing and displaying them on a screen of the display device based on predetermined characteristic points of the shape of each component. 2. The common jig design support apparatus according to claim 1, wherein the display control means displays the three-dimensional models of the plurality of parts in different colors. 3. A part having a common shape is extracted from an image in which the three-dimensional models of the plurality of parts are superimposed and displayed,
3. The common jig design support apparatus according to claim 1, further comprising a common part extraction display unit that displays the common part on the screen. 4. When there is no common part in the three-dimensional model of all parts, a grouping unit is provided for grouping parts having the common part and displaying the common part for each group on a screen. Claim 3 characterized by the following:
The described jig design support device. 5. A method for supporting the design of a jig that can be commonly used for a plurality of parts having different shapes, the method comprising: creating a three-dimensional model of the plurality of parts; Storing the original model in a storage means, and reading a three-dimensional model of a plurality of parts from the storage means,
Superposing and displaying them on a screen of a display device based on predetermined feature points of the shape of each component. 6. The common method according to claim 5, wherein in the step of displaying the three-dimensional models of the plurality of parts on a screen of a display device in a superimposed manner, the three-dimensional models are displayed in different colors. Jig design support method. 7. A part having a common shape is extracted from an image in which the three-dimensional models of the plurality of parts are superimposed and displayed,
7. The common jig design support method according to claim 5, further comprising a common part extracting and displaying step of displaying the common part on the screen. 8. In the common part extracting and displaying step,
8. The common treatment according to claim 7, wherein when there is no common part in the three-dimensional model of all parts, the common parts are grouped for each of the parts having the common part, and the common part for each group is displayed on a screen. Tool design support method.