JP2841326B2 - Method and apparatus for estimating workpiece design values of measuring machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for estimating a work design value of a measuring machine, and more particularly to a method of estimating a work design value of a measuring machine having means for comparing and comparing measured data with design values. Related to the device.

[0002]

2. Description of the Related Art Generally, the shape of a workpiece processed on a production line is measured after the processing, and the measured data is compared with a design value to check whether or not the workpiece is processed within a tolerance of the design value. Hereinafter, a method for inspecting the processing accuracy will be described with reference to the block diagram shown in FIG. 3 and the flowchart shown in FIG. For example, the shape of the work is measured by the three-dimensional coordinate measuring machine 10 and the measured data of the measured work is processed by the processing device 1.
2 (step 50). Next, the operator operates the key input unit 14 to input the design value of the work to the processing device 12 (step 52). When all the design values of the work necessary for the inspection are input to the processing device 12 (step 54), the processing device 12 collates the input measurement data with the design values, and outputs the result to the output unit 16. Output from
The operator checks whether or not the work is processed within the tolerance of the design value based on the output collation result.

[0003]

However, in the conventional inspection method, since the operator inputs the design value of the work by key, there is a problem that the measuring process of the three-dimensional coordinate measuring machine is interrupted at the time of key input. Further, for example, when a circle is formed on a work, when the circle of the work is measured by a three-dimensional coordinate measuring machine, a diameter, a radius, a center coordinate, a roundness, and the like are calculated as actually measured value data. Therefore, it is necessary to input a large number of design values, such as the diameter, radius, center coordinates, and roundness of the circle, as in the case of the actually measured value data. There is a problem that time becomes longer and work efficiency is reduced.

The present invention has been made in view of such circumstances, and enables inspection of a workpiece shape without interrupting a measuring process, and shortens inspection time to improve work efficiency. It is an object of the present invention to provide a method and an apparatus for estimating a work design value of a measuring machine.

[0005]

In order to achieve the above object, the present invention provides a measuring machine for measuring a workpiece shape, a storage unit for storing measured value data input from the measuring device, An analogy / storage unit for design value data, in which the numerical value of the actual measurement value data is rounded to an arbitrary digit set in advance according to the design value and the rounded value is stored as an analogous design value, It is characterized by comprising a comparison / collation unit for comparing and collating with a design value, and an output unit for displaying a comparison / collation result.

[0006]

According to the present invention, the measured value data of the workpiece shape measured by the measuring machine is stored in the measured value data storage section. The design value data analogy / storage unit rounds the stored actually measured value data to an arbitrary digit set in advance according to the design value of the work, and stores the rounded value as an analogy design value. In this case, the design value of the work and the analogy design value match. Therefore, the comparison and collation unit compares and compares the actually measured value data with the analogy design value, and displays the result on the display unit, so that the processing accuracy of the workpiece can be measured. Thus, the design value of the work can be automatically inferred just by measuring the shape of the work with the measuring machine, so that the key input operation of the design value can be eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and apparatus for estimating a work design value of a measuring machine according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a block diagram of a work design value estimating device of the measuring machine. In the figure, a work design value analogizing device 30 of a measuring machine includes a measuring machine 32, a processing device 34, and an output unit 3.
6. The measuring device 32 measures the shape of the work, and inputs the measured data to the processing device 34. The processing device 34 includes a storage unit 34A for measured value data and an analogization / storage unit 34B for design value data.
Stores the actual measurement value data input from the measuring device 32 and outputs the input actual measurement value data to the analogization / storage unit 34B.

The analogy and storage unit 34B rounds the numerical value of the input actually measured value data to an arbitrary digit. Then, the rounded value is stored as a design value. Here, a method of obtaining the design value will be described. Generally, a well-cut value (for example, 2.500 mm) without a fraction is adopted as a design value of a work. The measured value obtained by measuring the work is a value near the design value (for example, 2.497 mm, 2.503).
mm etc.). Therefore, when the design value is 2.500 mm, if the setting is made to round off the second decimal place of the measured value, the design value (2.500 mm) is inferred from the measured value (2.497 mm, 2.503 mm, etc.). be able to. Therefore, the design value can be inferred by rounding the numerical value of the actually measured value data to an arbitrary digit according to the design value.

A comparison / collation unit 34C of the processing unit 34 compares and compares the actually measured value data with the inferred design value data, and inputs the result to an output unit 36. The output unit 36 displays the input comparison result. The operation of the work design value estimating device for a measuring machine according to the present invention configured as described above will be described with reference to the flowchart of FIG.

First, the shape of the work is measured by the measuring machine 32, and the measured data is input to the measured data storage unit 34A of the processing unit 34 (step 60). The measured value data storage unit 34A stores the measured value data input from the measuring device 32, and outputs the input measured value data to the analogization / storage unit 34B. Analogue storage of design value data 3
4B rounds the numerical value of the input actually measured value data to an arbitrary digit according to the design value. Then, the rounded value is stored as a design value (step 62).

Next, the comparison and comparison unit 34C compares the measured value data input from the measured value data storage unit 34A with the analogy design value input from the design value data analogization / storage unit 34B.
The result is input to the output unit 36. The output unit 36 displays the input comparison result. Therefore, the operator judges the processing accuracy of the workpiece by looking at the displayed comparison and collation result.

[0012]

As described above, according to the method and apparatus for estimating the work design value of the measuring machine according to the present invention, the design value of the work is automatically analogized simply by measuring the shape of the work with the measuring machine. Therefore, the key input operation of the design value can be eliminated. Therefore, it is possible to inspect the shape of the workpiece without interrupting the measurement process, and to shorten the inspection time to improve the working efficiency.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a work design value estimating device of a measuring machine according to the present invention.

FIG. 2 is a flowchart illustrating a method for estimating a work design value of a measuring machine according to the present invention.

FIG. 3 is a block diagram showing a conventional work design value estimating device of a measuring machine.

FIG. 4 is a flowchart illustrating a conventional method of estimating a work design value of a measuring machine.

[Explanation of symbols]

 Reference numeral 30: Work design value analogization device of measuring machine 32: Measurement machine 34: Processing device 34A: Storage unit of measured value data 34B: Analogue and storage unit of design value data 34C: Comparison and collation unit 36: Output unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01B 5/00-5/30 G01B 21/00-21/32 G06F 7/38-7/54

Claims (2)

(57) [Claims] 1. A step of measuring a shape of a work with a measuring machine and storing actual measured value data, and rounding the stored actual measured value data to an arbitrary digit set in advance according to a design value of the work. And storing the rounded value as an analogy design value; and comparing and comparing the actual measurement value data with the analogy design value, and determining whether the actual measurement value data is within an allowable range of the design value. A method for estimating a workpiece design value of a measuring machine, comprising: 2. A measuring device for measuring a workpiece shape, a storage unit for storing actual measured value data input from the measuring device, and a numerical value of the actual measured value data set in advance according to a design value. An analogy / storage unit for design value data that stores the rounded value as an analogy design value, a comparison / matching unit that compares and compares measured value data with an analogy design value, An output unit for displaying, and a work design value estimating apparatus for a measuring machine, comprising: