JPS61296992A - Laser beam processing method - Google Patents

Abstract

PURPOSE:To economize a material and to reduce the size of material to be processing by irradiating a laser beam onto the surface of a work in the state of coloring the surface to a prescribed pattern at which the laser beam is easily absorbed so that only the one surface of the work can be processed. CONSTITUTION:The surface of the work 4 formed by coating the material 7 which absorbs the laser beam on both surfaces of the material 6 having th property to allow the transmission of the laser beam is colored with a color such as black which easily absorbs the laser light in the stage of processing the surface of the above-mentioned work 4. The quantity of the heat of the laser beam is absorbed in the colored part 5 and once the material melts, the reflectivity thereof sharply decreases and the work is efficiently worked. Only the colored part 5 of the work 4 is thus processed on one side. Then the need for superposing two sheets of the works, etc. is eliminated and the smaller material is correspondingly required. The reduction in the size is realized as well.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a laser processing method for processing only one surface of a workpiece.

BACKGROUND OF THE INVENTION Conventional laser processing methods include cutting and trimming, but in the above-mentioned methods, all substances on the workpiece that absorb the laser beam are processed. For this reason, when it is necessary to process different shapes on both surfaces, methods such as using a workpiece coated with a substance that absorbs the laser beam on only one side and overlapping them after processing have been used. .

Problems to be Solved by the Invention The above methods require high accuracy in overlapping two workpieces, and also require more materials and become larger than when processing both sides of a single workpiece. It had a point.

In view of the above problems, the present invention provides a laser processing method for processing only one surface of a workpiece.

Means for Solving the Problems In order to solve the above problems, the laser processing method of the present invention coats both surfaces of a material that transmits the laser beam with a material that absorbs the laser beam, and further coats the material that absorbs the laser beam in a predetermined pattern. A workpiece colored with a color that easily absorbs the beam,
It is equipped with a laser processing device.

Effects According to the present invention, with the above-described configuration, by coloring the surface of the workpiece with a color that easily absorbs a laser beam, the amount of heat is collected in the colored portion, and one side of the workpiece is processed.

EXAMPLE Hereinafter, a laser processing method according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a laser processing method in an embodiment of the present invention. In FIG. 1, 1 is a laser oscillator, 2 is a laser beam, 3 is a condenser lens, 4 is a workpiece, and 6 is a colored part.

The operation of the laser processing method configured as above will be described below with reference to FIGS. 1 and 2.

First, FIG. 2 is an enlarged view of a cross section around the processed portion.

Reference numeral 6 denotes a material constituting the workpiece 4 and has a property of transmitting the laser beam 2. 7 is a substance 6 that transmits the laser beam 2
It is a substance coated on the surface of the laser beam 2 that absorbs the laser beam 2. Laser beams are reflected to a large extent by the surfaces of common materials, especially metals. However, in the portion 6 colored with a color that easily absorbs the laser beam, such as black, the amount of heat is absorbed and processed. Once melted, the reflectance suddenly decreases and processing progresses efficiently.

A cross-sectional view after processing is shown in FIG. The material 7 on the back side that absorbs the laser beam is not colored and is therefore not processed.

Effects of the Invention As described above, the present invention provides a method for processing a workpiece in which a material that transmits a laser beam and a material that absorbs the laser beam are coated on both surfaces. By irradiating the laser beam while colored in a predetermined pattern, only the colored portion of the workpiece can be processed on one side.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a laser processing method according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the periphery of the processed portion, and FIG. 3 is a cross-sectional view of the workpiece after processing. 1... Laser oscillator, 2... Laser beam, 3... Condensing lens, 4... Workpiece, 5, -0- Laser beam A portion colored with an easily absorbing color, 6... Material that transmits the laser beam, 7... Material that absorbs the laser beam. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (2)

[Claims] (1) When processing a workpiece that is coated with a material that transmits the laser beam and a material that absorbs the laser beam on both surfaces, the surface of the workpiece is colored in a predetermined pattern with a color that easily absorbs the laser beam. A laser processing method characterized by irradiating a laser beam to process only the colored part on one side. (2) A laser processing method according to claim 1, characterized in that processing is performed using a workpiece having different colored patterns on both surfaces of a substance that absorbs a laser beam.