TW202006340A - Method for estimating tool wear by using color of chips estimating the tool wear generated when the chips are produced - Google Patents

Abstract

A method for estimating tool wear by using a color of chips includes the following steps: collecting chips after a cutting process; photographing the chips by using an image capturing device and analyzing a RGB value of a color of the chips; converting the RGB value of the color of the chips into a CIExyY chromaticity value; analyzing a wear value of a cutting tool by using the image capturing device; and establishing a database from the CIExyY chromaticity value of the chips and the wear value of the cutting tool. By means of this invention, by observing the color of the chips after cutting, this database can be used to estimate the tool wear when the chips are produced.

Description

Method for estimating tool wear using chip color

The present invention relates to the technical field of cutting processing, in particular to a method for estimating tool wear.

When using a cutting machine to cut a workpiece, the corresponding spindle spindle speed, blade feed rate, or cutting temperature and other processing conditions are set according to the material properties of the workpiece or the needs of the product to complete the cutting operation. According to this, the conventional method of estimating tool wear is often carried out by measuring the surface roughness, cutting temperature, current and vibration of the workpiece product. Among them, measuring the surface roughness must use a surface roughness measuring instrument to measure the cutting temperature, Current and vibration must be equipped with a temperature sensor, current sensor and acceleration gauge on the processing machine, and the degree of tool wear must be measured through an industrial microscope to accurately measure.

In the above-mentioned conventional estimation method, when measuring the surface roughness, since the workpiece or product to be measured may have a large volume, it is not easy to carry or carry, so it is not easy to perform the measurement. Furthermore, in the conventional method, at least three devices, such as a surface roughness measuring instrument, a temperature sensor, and an industrial microscope, must be used to collect more complete data, which has the disadvantage of higher cost. If a current sensor and an acceleration gauge for measuring current and vibration are added, it not only needs to be installed on the cutting machine, but also greatly increases the cost.

In view of this, how to improve the above problems is the primary problem to be solved by the present invention.

The present invention is based on the fact that chips are generated when the workpiece is cut using a cutting machine. Since the chips are generated by the high-speed rotating tool contacting the workpiece, the surface will be oxidized and discolored due to the high heat of friction. Therefore, an application chip color estimation is provided. A method of measuring tool wear, which collects a large amount of chip color and tool wear data and establishes a database, so that the tool wear can be estimated by observing the color of the chip.

The main purpose of the present invention is to simplify the technique for estimating the processing conditions, which can be implemented with less equipment and lower cost.

To achieve the foregoing purpose, the present invention provides a method for estimating tool wear using chip color, which includes: 　　takes the chip after cutting; 　　uses an image capture device to take the chip and analyze the RGB value of its color; 　　changes the chip color Convert the RGB values to CIExyY chromaticity values; 　　Use the image capture device to analyze the cutting tool wear value; 　　Build the above-mentioned chip CIExyY color value and cutting tool wear value as a database.

The above image capturing device is an industrial microscope.

In one embodiment, an image capture device is used to take multiple pieces of chips for shooting at a time, and the RGB value of the color is obtained.

In one embodiment, the RGB value of the chip color is corrected and then converted into a CIExyY chromaticity value.

However, it is not difficult to obtain an in-depth understanding from the following detailed descriptions and drawings of the selected embodiments.

Please refer to FIG. 1, which shows a method for estimating tool wear using chip color provided by the present invention, which includes: 　　taking chips after cutting; 　　using an image capturing device to take multiple pieces of chips at a time for shooting, and Analyze the RGB value of its color; 　　 Correct the RGB value of the above chip color, and then convert it to CIExyY chromaticity value; 　　Use the image capture device to analyze the cutting tool wear value; 　　The above chip's CIExyY chromaticity value and cutting tool wear value Create as a database.

In actual operation of the invention, the image capturing device is an industrial microscope. The image of the chip is captured by an industrial microscope, and the RGB value of the chip surface color is analyzed using analysis software. After correction, the value is converted into a CIExyY chromaticity value. The above color correction method is to take a standard color patch with an industrial camera, get the RGB shooting value of the standard color patch, and compare it with the correct value marked by the standard color patch to get the color exclusive to this camera The correction matrix is used to correct the color of the chip. In addition, after the cutting operation is completed, observe the cutting tool with an industrial microscope and analyze the degree of wear.

In a cutting operation, there will be a set of related data of the corresponding chip color and chromaticity value and tool wear value, and these data are used as a database. When a large amount of data is collected in the database, the data can be used to analyze the relationship between chip color and chromaticity values and tool wear values. According to this, the color of the chips can be observed in the future, and the processing conditions at the time when the chips are generated can be estimated by the database, such as the degree of wear of the tool.

Compared with the conventional estimation method, the present invention has the advantage that the object to be detected is a small chip which is easy to carry and carry, and is very simple and convenient to implement. In addition, in terms of data collection, the present invention only needs to use an industrial microscope for items such as chip color, chromaticity value and tool wear value, and thus has the effect of lower cost and easy implementation.

However, the disclosures of the above embodiments are only used to illustrate the present invention, not to limit the present invention. Therefore, the replacement of equivalent elements should still belong to the scope of the present invention.

In summary, those who are familiar with this skill can understand that the present invention can indeed achieve the aforementioned objectives, and in fact have complied with the provisions of the Patent Law, and file an application in accordance with the law.

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Figure 1 is a schematic diagram of the process of the present invention.

Claims (4)

A method for estimating tool wear using chip color, which includes: 　　Taking the chip after cutting; 　　Using an image capture device to shoot the chip and analysing the RGB value of its color; 　　Converting the RGB value of chip color to CIExyY chromaticity value ; 　　 Use the image capture device to analyze the cutting tool wear value; 　　 The above chip's CIExyY chromaticity value and cutting tool wear value are established as a database, which can be estimated by using this database by observing the chip color after cutting Tool wear when chips are generated. The method for estimating tool wear using chip color as described in claim 1, wherein the image capturing device is an industrial microscope. The method for estimating tool wear using chip color as described in claim 1, wherein an image capturing device is used to take multiple chips at a time for shooting, and the RGB value of the color is obtained. The method for estimating tool wear using chip color as described in claim 1, wherein the RGB value of the chip color is corrected and then converted into a CIExyY chromaticity value.

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