JPS5815232B2 - Processing method using laser light - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing method using a laser beam, which is applied, for example, to engraving wood with a CO2 laser beam.

Generally, when engraving wood or the like, methods using laser light are known as well as manual engraving using a carving blade.

However, the manual method is not suitable for mass production, and the conventional method using laser light drives the laser light or the workpiece in the mutually intersecting X-axis and Y-axis directions by numerical control. Since processing (engraving) a certain pattern on the workpiece, programming for numerical control is extremely complicated when processing complex patterns, and since a numerical control device is used, the processing equipment itself is The disadvantage was that it was expensive.

This invention was made in view of these circumstances, and its purpose is to enable easy and efficient mass production using inexpensive equipment, for example when engraving wood. An object of the present invention is to provide a processing method using laser light.

The present invention will be explained below with reference to an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a flat plate-shaped workpiece such as wood, which is set on a moving table (not shown).

A light shielding plate 2 is placed on the upper layer (worked surface) 1a of the workpiece 1. As shown in FIG.

This light-shielding plate 2 is made of a metal plate such as copper, and is provided with a certain pattern of light-transmitting portions 3 to be formed on the workpiece 1 .

This transparent portion 3 is, for example, a hole shaped into a predetermined shape.

CO generated from a laser beam generator (not shown)
2 laser beams 4 are converged by a lens 5 and irradiated to form an out-of-focus spot on the upper surface of the light shielding plate 2.

The moving table on which the workpiece 1 is set is movable in mutually intersecting (for example, perpendicular) X-axis and Y-axis directions, and the laser beam 4 irradiates the entire surface of the light shielding plate 2. It is designed to scan within a range.

With this configuration, the moving table can be moved along the X and Y axes.
As it scans in the axial direction, the CO2 laser beam 4 hits the light shielding plate 2.
The upper surface of the laser beam 4 is irradiated onto the surface to be processed 1a through the light-transmitting portion 3, and a recess 6 as shown in the figure is formed in the surface to be processed 1a.

Therefore, when the entire surface of the light shielding plate 2 is irradiated with the laser beam 4, the same pattern as the transparent portion 3 provided on the light shielding plate is engraved on the processed surface 1a.

Therefore, this method does not require programming for numerical control compared to the conventional method in which a laser beam or workpiece is driven by numerical control to process a fixed pattern on the workpiece surface. In addition, the workability is excellent because the laser beam 4 only needs to be irradiated on the entire surface of the light shielding plate 2, and the light shielding plate 2 can be easily formed by simply making holes of a certain shape that will become the transparent parts 3 in the copper plate. , and can be formed at low cost.

Furthermore, since expensive equipment such as a numerical control device is not required, the cost of the processing equipment itself can be reduced.

Furthermore, since it is possible to process a fixed pattern on a large number of workpieces by simply manufacturing one light shielding plate 2, mass production can be carried out efficiently.

In addition, since the light shielding plate 2 is in close contact with the workpiece 1, there is no possibility that scattered objects generated from the workpiece 1 during laser processing will not adhere to the back surface of the light shielding plate 2 and block the light-transmitting part 3. Since this does not occur, the transparent section 3 is always kept clean.

Furthermore, since the light shielding plate 2 is made of copper with good thermal conductivity and thermal diffusivity, the close contact allows for good heat to escape, and the temperature rise of the light shielding plate 2 is caused by the above-mentioned close contact surface of the workpiece 1. It is held down low enough to avoid thermal damage, which prevents thermal deformation and helps in accurate machining.

Note that the workpiece is not limited to wood, and may be appropriately selected from synthetic resin and others.

A plurality of light shielding plates 2 may be used in combination depending on manufacturing circumstances.

Furthermore, the laser light is not limited to CO2 laser light, and by adjusting the position of the lens 5, the focal position can be removed from the surface to be processed 1a and the spot diameter on the surface to be processed 1a can be increased. good.

Alternatively, the workpiece may be fixed and the laser beam may be scanned in the X-axis and Y-axis directions.

As described in detail above, the present invention can be applied to engraving on wood, etc., in which the surface to be processed is masked with a light-shielding plate having a certain pattern of light-transmitting parts, and a laser beam is emitted from above. The machine scans the machine in the mutually intersecting X-axis and Y-axis directions to process a certain pattern on the surface to be machined, which makes it possible to mass-produce easily and efficiently using inexpensive equipment. It is possible to provide a processing method using a laser beam that can be used.

[Brief explanation of the drawing]

The figure is a sectional view of a main part showing an embodiment of the present invention. 1a... Processed surface, 2... Light shielding plate, 3
......Transparent part, 4...C02 laser light.

Claims (1)

[Claims] 1. A process in which a light-shielding plate made of copper or a metal with relatively good thermal conductivity such as copper and having a light-transmitting part formed by cutting out a pattern corresponding to the processing shape is brought into close contact with the workpiece, and the workpiece is and a step of processing the pattern formed by the light-transmitting portion on the workpiece by relatively scanning the laser light and the laser light in the X-Y direction and irradiating the light shielding plate with the laser light. A processing method using laser light characterized by: