JPH02223831A - Method for detecting coating defect of paint - Google Patents

Abstract

PURPOSE:To securely eliminate a defect in coating by detecting the coating state right after paint is applied by a color tone sensor. CONSTITUTION:The coated surface X of a body 1 is coated with the paint in order by a coating device 2 and the color tone sensor 7 detects the color tone wave of a primer right after the body 1 is coated right behind the coating part. Then the color tone wave which is detected by the sensor 7 is outputted to a chromaticity meter 9, which compares a reflected wave obtained by a photodetection part with a preset color tone wave to output a coating defect signal if sensing wavelength other than the coating color tone wave is sensed. Consequently, the defect in the coating of the paint can be detected automatically and the reliability of an automatic coating system can be improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for detecting poor coating of paint, and more specifically, for example, a method for detecting poor coating of a paint applied to the body of an automobile or the main body of a vehicle. The present invention relates to a coating defect detection method.

[Prior Art] Conventionally, there are two known methods of applying paint called a primer to the body (steel plate) of an automobile: manually by a worker, and automatically using a robot. .

[Problem that the invention seeks to solve]

By the way, in the past, workers had to check the application of the primer after it was applied to the body. This requires a lot of effort and time, and furthermore, the standards for variations in coating conditions are not clear, leading to a problem of quality deterioration.

(Purpose of the Invention) The present invention was devised by focusing on such conventional problems, and by detecting the coating state with a color sensor immediately after applying the primer, it is possible to reliably prevent coating defects and to automatically apply the primer. It is an object of the present invention to provide a coating defect detection method that can improve the reliability of the system and improve the quality.

[Structure of the invention]

In order to achieve the above object, this invention sequentially applies paint to the coating surface using a coating jig, detects the tonal waves of the applied paint by a color tone sensor installed immediately behind the coating part, and detects the detected color tone. The gist of this method is to automatically detect coating defects by inputting wave data into a chromaticity meter and comparing it with preset color tone wave data.

[Action of the invention]

The present invention is configured as described above, and the color tone sensor detects the tonal wave of the primer immediately after it is applied to the body, and when a wavelength other than the primer tonal wave is detected, a coating failure signal is output. automatically detect defects,
Moreover, it is characterized by reliable detection.

[Embodiments of the invention] The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows a schematic configuration diagram of a paint (primer in this embodiment) coating defect detection device according to the present invention.
2 is a coating device that sequentially coats the body 1 with a primer in a predetermined width. Tool 6 is attached.

A color sensor 7 is attached to the rear side (left side) of the jig 5 in the application direction (in this embodiment, the application is performed sequentially from the left side to the right side in the figure) to detect the color wave of the paint (primer). There is.

The color tone sensor 7 is connected to a color meter 9 via an optical fiber 8.

The color tone sensor 7 has a light emitting part and a light receiving part (
), the paint-coated surface of the body L is sequentially illuminated, and the reflected waves of the light are received by the light receiving section and the colorimeter 9
Here, the preset primer color tone wave is compared with the reflected wave captured by the light receiving section, and when a wavelength other than the primer color tone wave is detected, a coating failure signal is output.

Incidentally, the above-mentioned coating failure detection device can also be implemented on the body flange surface, glass surface, etc. of an automobile, as shown in FIG.

Next, a method for detecting poor primer application will be described.

First, paint is sequentially applied to the application surface X of the body 1 by the application device 2, and the color tone wave of the primer immediately after being applied to the body 1 is detected by the color sensor 7 immediately behind the application section.

Then, the tonal waves detected by the tonal sensor 7 are output to the chromaticity meter 9 via the optical fiber 8, and the preset primer tonal waves are compared with the reflected waves captured by the light receiving section. It is configured to output a coating failure signal when the wavelength is detected.

As described above, poor coating of paint applied to the body 1 can be automatically detected by the color tone sensor 7, which improves reliability as an automatic coating system and improves quality and reduces costs. be.

〔Effect of the invention〕

As described above, this invention sequentially applies paint to a coating surface such as a body using a coating jig, and detects tonal waves of the applied paint using a color sensor installed immediately behind the coating section. Coating defects are automatically detected by inputting the tonal wave data into a chromaticity meter and comparing it with preset tonal wave data.This makes it possible to reliably prevent coating defects and improve the performance of automatic dispensing systems. This has the effect of improving credibility, improving quality, and further reducing costs.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of the paint coating defect detection device;
The figure is a perspective view showing the state in which it is applied to the body. DESCRIPTION OF SYMBOLS 1...Body, 2...Coating device, 3...Robot, 5...Jig, 6...Primer coating jig, 7
...Color sensor, 8...Optical fiber 9...Chromaticity meter.

Claims (1)

[Claims] In the method of sequentially applying paint to the coating surface of the object to be coated via a coating jig and detecting the coating state, the coating jig is used to sequentially apply the paint to the coating surface, and at the same time, the coating jig is installed immediately behind the coating section. The color sensor detects the tonal waves of the applied paint, inputs the detected tonal wave data into a chromaticity meter, and compares it with preset tonal wave data to automatically detect coating defects. A method for detecting poor paint application, characterized by: