JPH01130895A - Marking device - Google Patents

Abstract

PURPOSE:To obtain a clear display and not to spoil and environment by providing on a head the nozzle having a 1st port and the 2nd port provided on the outer wheel of the 1st port. CONSTITUTION:A head is composed by inner-providing the light source 11 outputting a YAM laser to a case 19 and the condensing lens 13 covering an outputted laser light 3 on the specified beam diameter and by providing the nozzle 4 on which the 1st port 5 projecting the laser light 3 converged and the 2nd port 5 provided on the outer wheel thereof are formed at one part of the case 19. The 1st port 5 is also formed so that an oxygen 8 and inert gas 9 are injected by a tube 18. Now the tip of the nozzle 4 is opposed at the specified intervals S to a metal member 2, the beam by the laser light 3 is projected and by removing the plating layer 14 of a surface 2A by melting it the display of a code is performed. The face only of the metal member 2 of an exposed P point is oxidized in black color, other places maintains its brightness without being oxidized by the protection of the inert gas and a clear display is obtd.

Description

[Detailed Description of the Invention] [Summary] Regarding a marking device that displays barcodes and other information on the surface of metal materials by irradiating laser light, the present invention aims to make identification easier by making the display clearer. In addition to focusing and irradiating the laser beam, the first port spews out oxygen and inert gas is ejected into the outer ring of the first port. The head is provided with a nozzle consisting of a second opening.

[Industrial application field]

The present invention relates to a marking device that displays a bar code or the like on the surface of a metal material by irradiating it with laser light.

Printed circuit boards used in electronic devices are usually marked with a serial number or type during the manufacturing process.

Such display is generally performed by barcode display, and when the barcode display is performed on a mounting frame of a printed circuit board, a marking device is used and the display is performed by the marking device.

Therefore, for example, in an assembly or testing process, automation is created in which printed circuit boards are loaded onto a predetermined conveyor line and transferred, the barcode display is read, and the predetermined assembly or test work is performed. Ru.

Therefore, it is important that such a barcode display be clearly displayed to avoid misreading during reading.

[Conventional technology]

Conventionally, the structure was as shown in the conventional explanatory diagram in FIG. 3 and the conventional main part side view in FIG. 4. FIG. 3(a) is a perspective view, and FIG. 3(b) is a side view of the main part.

As shown in FIG. 3(a), the printed circuit board 14 secured to the mounting frame 15 is mounted on the table 16, and the head 10 is mounted on the table 16.
By swinging the bar code in the X and Y directions, a predetermined bar code is displayed in the display area 17 of the mounting frame 15.

This head 10 is attached to the case 12 as shown in FIG.
It is constructed by housing a light source 11 that outputs an AG laser and a focusing lens 13 that focuses the output laser beam 3 to form a predetermined beam diameter.

Further, the mounting frame 15 is a metal member 2 made of a Pe-Ni alloy.
It is formed by applying a plating layer 15 such as gold plating to the surface 2A.

Therefore, the plating layer 14 is irradiated with a focused laser beam 3,
Display was performed by melting or evaporating the plating layer 14.

However, in such a configuration, the surface of the metal member 2 exposed at the location where the plating layer 14 is removed and the surface of the plating layer I4 at the location where the plating layer 14 is not removed have the same gloss.

Therefore, when reading the barcode displayed in the display area 17 using a photosensor, it becomes difficult to read the barcode.

Therefore, a configuration as shown in FIG. 4 may be considered.

In the case of FIG. 4, the head 20 is configured by installing a light source 11 that outputs a YAG laser in a case 21 and a focusing lens 13 that focuses the output laser beam 3 to a predetermined beam diameter. A nozzle 22 for ejecting particles of carbon 23 and a suction device 24 for sucking the particles of carbon 23 are disposed at a point P to which the beam No. 3 is irradiated.

Therefore, the particles of carbon 23 ejected from the nozzle 22 are fused to the plating layer 14 applied to the surface 2A of the metal member 2 by a beam, and the particles of carbon 23 that are not fused are removed by the suction device 24.

Therefore, the point P where the particles of carbon 23 are fused in this way becomes black, while the other points become a metallic shiny surface, making it possible to obtain a display with a clear contrast difference.

[Problem that the invention seeks to solve]

However, it is difficult to completely absorb such particles of carbon 23 by the suction device 24, and there is a drawback that they damage the environment.

Therefore, the configuration shown in FIG. 1 has poor contrast and is prone to misjudgment, and the configuration shown in FIG. 1 has the problem of damaging the environment due to the harmful carbon 23 being splashed.

Therefore, it is an object of the present invention to make the display clear so that it can be easily distinguished and to avoid damaging the environment.

Measures to solve problem C] FIG. 1 is a diagram explaining the principle of the present invention.

As shown in FIG. 1, a nozzle consists of a first port that focuses and irradiates laser light and spews out oxygen, and a second port that spouts inert gas to the outer ring of the first port. It is configured to be included in the head.

With this configuration, the above-mentioned problems are solved.

[Operation] That is, by providing the head with a nozzle having a first port and a second port provided on the outer ring of the first port, the first port
At the same time as the laser beam is irradiated, oxygen is ejected from the mouth of the
Furthermore, a colored oxide film is formed on the exposed metal member by blowing out inert gas from the second port.

- Therefore, in addition to removing the plating layer and exposing the surface of the metal member as in the past, coloring is performed, resulting in a clear display.

〔Example〕

The present invention will be explained in detail below with reference to FIG.

FIG. 2 is a side view of essential parts of an embodiment according to the present invention. The same reference numerals indicate the same objects throughout the figures.

As shown in FIG. 2, a case 19 is equipped with a light source 11 that outputs a YAG laser and a focusing lens 13 that focuses the output laser beam 3 to a predetermined beam diameter. the first to irradiate the laser beam 3
The head 1 is constructed by providing a nozzle 4 having a first opening 5 and a second opening 6 provided on the outer ring of the tenth opening 5, and the other configuration is the same as described above.

Further, oxygen (0□) 8 supplied by the tube 18 is ejected into the first port 5, and the tube 1 is injected into the first port 5.
Inert gas 9 such as nitrogen (N2) or argon gas (^r) supplied by gas 8 is ejected.

Therefore, the tip of the nozzle 4 is opposed to the metal member 2 at a predetermined distance S, and a beam of laser light 3 is irradiated to the surface 2A.
By melting and removing the plating layer 14, the above-mentioned bar code is displayed.

In this case, the ejected oxygen (Ol) 8 is covered with an inert gas 9, and only the irradiated point P becomes an atmosphere of oxygen (oz) e, and the metal member at the exposed point P A black oxide film will be formed on the 20th surface.

Therefore, only the surface of the metal member 2 at the exposed point P becomes black, and the other parts are protected by the inert gas 9 and are not oxidized, so that the gloss can be maintained and a clear contrast difference can be seen. It is possible to obtain a display with .

In addition, the concentration of this black oxide film is the oxygen supplied (0□
) VIII, and if the supply amount is increased, the concentration will be high, and if the supply amount is decreased, the concentration can be made low.

〔Effect of the invention〕

As described above, according to the present invention, display can be performed by ejecting oxygen at point P irradiated with laser light and generating a black oxide film only at point P.

Therefore, it is possible to display a clearer display than before.
Furthermore, since there is no need to use harmful substances such as carbon, there is no need to damage the environment, and the practical effects are great.

[Brief explanation of the drawing]

FIG. 2 is an xppr diagram of an embodiment according to the present invention. FIG. 3 is an explanatory diagram of the conventional technology, in which (a) is a perspective view, and (b) is a side view of the main part. FIG. 4 shows a side view of a conventional main part. In the figure, 1 is a head, and 2 is a metal member. 3 is a laser beam, 4 is a nozzle. 5 is the first mouth, 6 is the second mouth. 8 is oxygen, 9 is inert gas. 2A shows the surface. The principle of the incomplete e month is the theory of the moon.] 1st m. Upward J door map of ``The Unknown Complete Excitement'', 4 A to 2.

Claims (1)

[Scope of Claims] A head (1) that focuses and irradiates a laser beam (3), and a drive mechanism for the head (1), and the head (1) is directed to the surface (2A) of the metal member (2). It is a marking device that displays a predetermined bar code or the like on the surface (2A) by scanning the surface (2A) at a predetermined interval (S), and it focuses and irradiates the laser light (3) and emits oxygen (8
) and a second port (6) that spouts an inert gas (9) to the outer ring of the first port (5). A marking device comprising (1).