JP2003130631A - Method for creating measurement program and its system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create a measurement program which avoids probing the scar of an ejector pin or the like without viewing the actual object of a three- dimensional molding. SOLUTION: Metal molding model data are created based on molding model data in order to make a metal molding for forming the molding, and obstacle data obstructing the measurement of the three-dimensional molding are extracted from the metal molding model data, and measurement model data is made by adding the obstacle data to the molding model data, and the measurement program activating a three-dimensional measuring machine 3 is made up from the measurement model data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring program creating method and system for creating a measuring program for operating a three-dimensional measuring machine to measure a three-dimensional molded article.

[0002]

2. Description of the Related Art For a three-dimensional molded product such as a casing of a mobile phone, various measurements are performed using a contact-type three-dimensional measuring machine. This three-dimensional measuring machine operates according to a measurement program created based on model data of a three-dimensional molded product (hereinafter referred to as molded product model data) to measure a three-dimensional molded product.

FIG. 7 is a process chart from the production of molded product model data to the actual measurement of a three-dimensional molded product. First, in step # 1, the molded product model designer uses three-dimensional CAD.
(Computer Aided Design) Creates model data of a molded product using a device. The molded product model data is three-dimensional CAD data designed by arranging ribs and pins on the model designed by the designer.

Next, in step # 2, the three-dimensional CA
The D device creates mold model data for creating a mold based on the molded product model data. This mold model data is also three-dimensional CAD data.

Next, in step # 3, a mold is manufactured from the mold model data, and in the next step # 4, a three-dimensional molded product is molded using the mold.

On the other hand, in step # 5, the molded product model data is passed to a CAT (Computer Aided Testing) device. This CAT device creates a measurement program for operating the three-dimensional measuring machine based on the molded product model data between the mold manufacturing and the molding.

Next, in step # 6, the measurement program is modified so as to avoid probing such as a mark of an ejector pin, which is formed during molding, while observing the actual three-dimensional molded product obtained after molding.

That is, in the molding, the mold side (concave side) and the core side (convex side) of the mold are combined to form a three-dimensional molded product. At the time of this molding, the traces of the ejector pins become a three-dimensional molded product. Remain. If you measure at the position of the trace of this ejector pin, the accurate measurement cannot be done,
The measurement program is modified so that the measurement point is moved so as to avoid the measurement at the position of the trace of the ejector pin.

Next, in step # 7, the three-dimensional measuring machine is operated using the corrected measuring program to measure the three-dimensional molded product.

[0010]

However, in the above method of creating the measurement program, since there is no data such as the position of the ejector pin trace or the size of the ejector pin for which probing is to be avoided in the molded product model data, the above step #
As shown in 6, the measurement program must be modified so as to avoid probing such as a trace of the ejector pin while observing the actual three-dimensional molded product.

Therefore, it is an object of the present invention to provide a measuring program creating method and system capable of creating a measuring program that avoids probing such as a trace of an ejector pin without looking at the actual three-dimensional molded product.

[0012]

According to the present invention, there is provided a method for creating a measurement program for operating a three-dimensional measuring machine to measure a three-dimensional molded product. The first step of creating mold model data for creating a mold for casting, and the obstacle data that obstructs the measurement of the three-dimensional molded product from the mold model data are extracted, and the obstacle data is extracted. It is characterized by comprising a second step of creating measurement model data by adding it to the molded product model data and a third step of creating a measurement program for operating a three-dimensional measuring machine from the measurement model data. This is a measurement program creation method.

According to the present invention, in the above-mentioned measurement program creating method of the present invention, the second step is a step of matching the coordinate system of the core model data among the molded product model data and the mold model data, and the core model. A step of extracting obstacle data from the data and adding the obstacle data to the molded article model data to create measurement model data.

The present invention is characterized in that, in the above-mentioned measuring program creating method of the present invention, the obstacle data comprises the position and size of the obstacle.

According to the present invention, in the above-mentioned measuring program creating method of the present invention, the third step is whether or not the measuring points of the three-dimensional molded product by the three-dimensional measuring machine interfere with the obstacle based on the measuring model data. And a step of moving the position of the measurement point if the measurement point interferes with the obstacle.

In the measurement program creating method of the present invention, the interference of the measurement points with the obstacle is represented by a circle having a predetermined diameter, and the measurement point of the three-dimensional molded product is inside or outside the circle. The feature is that it is determined by whether or not.

The present invention is characterized in that, in the above-mentioned measurement program creating method of the present invention, if the measurement point interferes with an obstacle, a step of notifying the fact of the interference is provided.

The present invention creates mold model data for creating a mold for casting a molded product based on the model data of the three-dimensional molded product, and the model data for measurement based on the molded product model data. 3D CAD device for creating
In a measurement program creation system including a CAT device that creates a measurement program for operating a three-dimensional measuring machine from measurement model data, the three-dimensional CAD device is an obstacle to measurement of a three-dimensional molded product from mold model data. The measurement program creating system has a function of extracting obstacle data and adding the obstacle data to molded product model data to create measurement model data.

According to the present invention, in the above-described measurement program creating system of the present invention, the three-dimensional CAD device has a function of matching the coordinate system of the core model data of the molded product model data and the mold model data, and the core model. It is characterized by having a function of extracting obstacle data from the data and adding the obstacle data to the molded product model data to create measurement model data.

According to the present invention, in the above-described measurement program creating system of the present invention, the CAT device determines whether or not the measurement points of the three-dimensional molded product by the three-dimensional measuring machine interfere with the obstacle based on the measurement model data. It is characterized by having a function of judging and a function of moving the position of the measuring point if the measuring point interferes with an obstacle.

According to the present invention, in the above-mentioned measurement program creating system of the present invention, the CAT device represents an obstacle by a circle having a predetermined diameter, and judges whether the measurement point of the three-dimensional molded product is inside or outside the circle. It is characterized in that the interference of the measuring point with the obstacle is judged.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a measurement program creating system. This measurement program creating system includes a three-dimensional CAD device 1 and a CAT device 2. The three-dimensional measuring machine 3 receives the measurement program created by the measurement program creating system, operates according to the measurement program, and measures the three-dimensional molded article by contact.

The three-dimensional CAD device 1 creates mold model data for creating a mold for casting a three-dimensional molded product based on the model data of the three-dimensional molded product, and based on the model data of the molded product. Has a function of creating model data for measurement.

This three-dimensional CAD device 1 is characterized in that it has a measurement model creating section 4 for creating measurement model data. The measurement model creation unit 4 extracts obstacle data that interferes with the measurement of the three-dimensional molded product from the mold model data and adds the obstacle data to the molded product model data to create the measurement model data. Have the function to

Obstacle data, which is an obstacle to the measurement of a three-dimensional molded product, will be explained by taking the molding of the casing of a mobile phone as an example. The three-dimensional molded product is molded by combining the mold side with the gabi side. There are traces of ejector pins left when doing.

Specifically, the measurement model creating section 4 has a matching section 5 and a measurement model data creating section 6.
The matching unit 5 has a function of matching the coordinate system with the core model data of the molded product model data and the mold model data.

The measurement model data creation unit 6 has a function of extracting obstacle data from the core model data and adding the obstacle data to the molded product model data to create measurement model data.

The CAT device 2 has a function of creating a measurement program for operating the coordinate measuring machine 3 from measurement model data. The CAT device 2 has an interference determination unit 7 and a measurement point moving unit 8.

The interference judging section 7 has a function of judging whether or not the measuring point of the three-dimensional molded product by the three-dimensional measuring machine 3 interferes with an obstacle based on the measurement model data. Specifically, the interference determination unit 7 has a function of expressing an obstacle by a circle having a predetermined diameter, determining whether the measurement point of the three-dimensional molded product is inside or outside the circle, and determining the interference of the measurement point with the obstacle. Have.

Further, if the interference judging section 7 judges that the measuring point interferes with the obstacle, the interference judging section 7 informs of the interference, for example, by sound, or an error message is displayed on the display screen of the CAT device 2. Has the function of displaying.

The measurement point moving section 8 has a function of moving the position of the measurement point if the measurement point interferes with an obstacle as a result of the judgment of the interference judgment section 7.

Next, the operation of the apparatus configured as described above will be described with reference to the process diagram shown in FIG. 2 from the production of molded product model data to the actual measurement of a three-dimensional molded product.

First, in step # 1, the molded product model designer uses the three-dimensional CAD device 1 to create molded product model data. The molded product model data is three-dimensional CAD data designed by arranging ribs and pins on the model designed by the designer.

The three-dimensional CAD data is written in a common format called an intermediate file, IGES (In
Itial Graphics Exchange Specification) format data. The IGES format is expressed in a text format as shown in FIG. 3, for example.

In the molded product model data, the positions and sizes of ribs and pins are known, but ejector pins that remain when the mold side and core side are combined to form a three-dimensional molded product. We do not know the position and size of the traces of.

Next, in step # 2, the three-dimensional CA
The D device 1 creates mold model data for creating a mold based on the molded product model data. This mold model data is also three-dimensional CAD data in IGES format.

FIG. 4 is a schematic view showing a part of mold model data of a mobile phone housing. The mold model data is composed of mold component parts such as gabi model data and core model data which are divided into two on the gabi side and the core side. The mold model data shown in FIG. 4 includes data ED of the position and size of the ejector pin. In FIG. 4, the position of the ejector pin and the data ED of the size thereof are shown by black circles for easy understanding.

Next, in step # 3, a mold is manufactured from the mold model data, and in the next step # 4, a three-dimensional molded product is molded using the mold.

On the other hand, the three-dimensional C
In step # 10, the AD device 1 forms the three-dimensional molded product from the mold model data, which is an obstacle data for the measurement of the three-dimensional molded product, that is, the gabi side and the core side of the mold are combined. The obstacle data such as the traces of the ejector pins remaining in the step 2 is extracted, and the obstacle data is added to the molded product model data to create the measurement model data.

More specifically, referring to the process diagram for creating the measurement model shown in FIG. 5, the matching unit 5 determines in step # 10-1 the core model data among the molded product model data and the mold model data. Match the coordinate system with and.

This coordinate system matching is based on the coordinate system of the molded product model data, and the design origin of the core model data is aligned with the coordinate system of the molded product model data.

Next, in step # 10-2, the measurement model data creation unit 6 extracts obstacle data from the core model data, adds the obstacle data to the molded product model data, and obtains the measurement model data. create.

Specifically, the XYZ coordinate values and diameter values of the bottom surface of the hole shape into which the ejector pin is inserted are extracted from the core model data as obstacle data, and the XYZ coordinate values and diameter values of the bottom surface of these hole shapes are extracted. And are added to the molded product model data.

As a result, a circular shape indicating obstacle data is added to the molded product model data. Since the position of the ejector pin may deviate from a predetermined position with respect to the three-dimensional molded product model during manufacturing of the molded product, the diameter of the circular shape indicating the obstacle data is larger than the original size of the trace of the ejector pin. For example, 0.2 mm as an experience value
Is formed.

On the display screen of the three-dimensional CAD device 1, molded product model data to which a circular shape indicating obstacle data is added is displayed. The measurement program creator can visually understand the position and size of the trace of the ejector pin by looking at the display of the molded product model data.

Next, in step # 11, the measurement model data is transferred from the three-dimensional CAD device 1 to the CAT device 2. When the CAT device 2 creates a measurement program for operating the three-dimensional measuring machine 3 from the measurement model data, the interference determination unit 7 determines the three-dimensional molded product of the three-dimensional measuring machine 3 based on the measurement model data. Determine whether the measurement point does not interfere with the obstacle.

Specifically, the interference judging section 7 expresses an obstacle by a circle having a predetermined diameter, judges whether the measuring point of the three-dimensional molded product is inside or outside the circle, and judges the interference of the measuring point with the obstacle. to decide.

If the result of this determination is that the measurement point is outside the circle, the measurement point does not interfere with the obstacle, so the measurement point is determined at that position.

On the other hand, if the measuring point interferes with the obstacle, the measuring point moving unit 8 moves the position of the measuring point.
In this case, the measurement point moving unit 8 moves the measurement point along the circumference of a circle having a predetermined diameter that represents an obstacle. However, in order to avoid interference between the measurement point and the surrounding ribs and pins, the measurement point is moved at a predetermined distance or more, for example, 0.5 mm or more from the rib or pin.

Further, if the measuring point interferes with the obstacle, the interference judging section 7 informs of the interference, for example, by sound, if it judges that the measuring point interferes with the obstacle. Alternatively, an error message is displayed on the display screen of the CAT device 2.

When an error message is displayed, the measurement program creator operates the CAT device 2 to create a measurement point such that the position of the measurement point is outside the circular shape of a predetermined diameter that represents an obstacle. To do.

When the positions of all measurement points are determined, CAT
The device 2 creates a measurement program for operating the coordinate measuring machine 3 from the measurement model data. This measurement program is a common format DMIS (Dimensional Measuri).
ng Interface Stadard) format. This DMIS format is also a text format as shown in FIG.

Next, the measurement program is transferred from the CAT device 2 to the coordinate measuring machine 3. This three-dimensional measuring machine 3
In step # 12, the three-dimensional molded product is measured by operating according to the measurement program.

As described above, in the above-mentioned one embodiment,
Create mold model data for creating a mold for casting a molded product based on the molded product model data, and extract obstacle data that obstructs the measurement of the three-dimensional molded product from this mold model data. This obstacle data is added to the molded product model data to create measurement model data, and a measurement program for operating the coordinate measuring machine 3 is created from this measurement model data. Even if you do not look at the actual 3D product, you can automatically create a measurement program that avoids probing such as ejector pin traces left when molding the 3D product by combining the mold side with the core side. it can.

As a result, there is no need to modify the measurement program so as to avoid probing such as a trace of the ejector pin while looking at the actual three-dimensional molded product.

Therefore, the measurement program can be easily created, and the burden on the measurement program creator can be reduced.

The present invention is not limited to the above-mentioned one embodiment, and can be variously modified at the stage of implementation without departing from the scope of the invention.

Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the section of the problem to be solved by the invention can be solved, and it is described in the section of the effect of the invention. When the effect of being obtained is obtained, a configuration in which this constituent element is deleted can be extracted as an invention.

For example, in the above-mentioned one embodiment, the three-dimensional CAD data of the molded product model data and the mold model data is in the IGES format and the measurement program is in the DMIS format, but these data can be in other formats. Good.

Further, in the above-mentioned one embodiment, the case of creating the measurement program of the three-dimensional molded product of the casing of the mobile phone has been described, but the three-dimensional molded product is not limited to the type of the molded product.

[0062]

As described above in detail, according to the present invention, 3
A measurement program creation method and system capable of creating a measurement program that avoids probing such as a trace of an ejector pin without looking at the actual three-dimensional molded product.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a measurement program creating system according to the present invention.

FIG. 2 is a process diagram from creation of molded product model data to actual measurement of a three-dimensional molded product using an embodiment of a measurement program creation system according to the present invention.

FIG. 3 is a diagram showing a text format expressing molded product model data in the embodiment of the measurement program creating system according to the present invention.

FIG. 4 is a schematic diagram showing a part of mold model data of a mobile phone housing in the embodiment of the measurement program creating system according to the present invention.

FIG. 5 is a process diagram of creating a measurement model in an embodiment of a measurement program creation system according to the present invention.

FIG. 6 is a DMI representing a measurement program in one embodiment of the measurement program creating system according to the present invention.
The figure which shows S format.

FIG. 7 is a process diagram from the creation of conventional molded product model data to the actual measurement of a three-dimensional molded product.

[Explanation of symbols]

1: Three-dimensional CAD device 2: CAT device 3: Three-dimensional measuring machine 4: Measurement model creation unit 5: Matching section 6: Measurement model data creation unit 7: Interference determination unit 8: Measuring point moving part

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G06T 7/60 150 G06T 7/60 150B 150J 17/40 17/40 A F term (reference) 2F069 AA04 BB32 CC10 DD25 HH01 JJ26 QQ03 5B046 AA05 JA01 5B050 AA04 BA09 BA18 CA07 DA10 EA05 EA07 EA18 EA26 FA02 5H269 AB19 AB26 AB37 BB08 BB14 5L096 AA09 BA12 EA14 FA59 FA69 JA20

Claims (10)

[Claims] 1. A method of creating a measurement program for operating a three-dimensional measuring machine to measure a three-dimensional molded product, comprising: determining a mold for casting the molded product based on model data of the three-dimensional molded product. A first step of creating mold model data for creating, and extracting obstacle data which is an obstacle to measurement of the three-dimensional molded product from the mold model data, and uses this obstacle data as the molded product model. A second step of creating measurement model data by adding to the data; and a third step of creating the measurement program for operating the three-dimensional measuring machine from the measurement model data. How to create a measurement program. 2. The second step comprises a step of matching the coordinate system between the molded product model data and core model data of the mold model data, and extracting the obstacle data from the core model data. Then
The method according to claim 1, further comprising the step of adding the obstacle data to the molded product model data to create the measurement model data. 3. The method for creating a measurement program according to claim 1, wherein the obstacle data comprises a position and a size of the obstacle. 4. The step of determining whether or not a measurement point of the three-dimensional molded article by the three-dimensional measuring machine interferes with the obstacle based on the measurement model data, The method according to claim 1, further comprising moving the position of the measurement point if the measurement point interferes with the obstacle. 5. The interference of the measuring point with the obstacle is represented by a circle having a predetermined diameter,
The method for creating a measurement program according to claim 4, wherein the measurement program of the three-dimensional molded product is determined by determining whether the measurement point is inside or outside the circle. 6. The measurement program creating method according to claim 4, further comprising the step of notifying the user of the interference if the measurement point interferes with the obstacle. 7. Mold model data for creating a mold for casting the molded product based on model data of the three-dimensional molded product, and model data for measurement based on the molded product model data. A three-dimensional CAD device for creating a measurement program and a CAT device for creating the measurement program for operating the three-dimensional measuring machine from the measurement model data, wherein the three-dimensional CAD device is It has a function of extracting obstacle data that interferes with the measurement of the three-dimensional molded article from mold model data and adding the obstacle data to the molded article model data to create the measurement model data.
A measurement program creation system characterized in that 8. The three-dimensional CAD device has a function of performing coordinate system matching between the molded product model data and core model data of the mold model data, and extracting the obstacle data from the core model data. Then
The measurement program creating system according to claim 7, further comprising a function of adding the obstacle data to the molded product model data to create the measurement model data. 9. The CAT device has a function of determining whether or not a measurement point of the three-dimensional molded product by the three-dimensional measuring machine interferes with the obstacle based on the measurement model data, and the measurement. The measurement program creating system according to claim 7, further comprising: a function of moving the position of the measurement point if the point interferes with the obstacle. 10. The CAT device represents the obstacle by a circle having a predetermined diameter, determines whether the measurement point of the three-dimensional molded product is inside or outside the circle, and determines the measurement point with respect to the obstacle. The measurement program creating system according to claim 9, wherein interference is determined.