JPH04284995A - Work table for laser beam machine - Google Patents

Abstract

PURPOSE:To prevent the molten matter generated at the cut machining time from sticking to the rear surface of metal plate to be machined, and to prevent a generated smoke or a smell from scattering to the surroundings on the work table for supporting the metal plate to be machined of the laser beam machine for cutting the metal plate or the resin plate. CONSTITUTION:On the frog like work table for laser beam machine that, at least, three column like supporting members 11 are stood by separating them mutually, and support the plate 5 to be machined, the water channel 2 is formed in the column like supporting members 1, the water jetting nozzle 3 to open to the horizontal direction is formed at the top end of the column like supporting members 11 set by connecting to this water channel 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table for supporting a workpiece of a laser processing machine for cutting sheet metal or resin plates.

[0002] Cutting of sheet metal and resin plates using laser light enables high-speed processing and precision processing, and moreover, it uses NC.
It is widely used because it allows free shape processing through control. Cutting using a laser beam is a fusing process using the thermal energy of the laser beam, so it is necessary to deal with various problems caused by heat.

0003

2. Description of the Related Art In a laser processing machine for cutting sheet metal or resin plates, a work table in the form of a crest or a lattice is used as a means for horizontally supporting the plate to be processed. Additionally, in order to effectively use the thermal energy of the laser beam during cutting and achieve high-speed, high-quality processing, oxygen or other gas is sprayed as an assist gas through a thin nozzle onto the laser beam irradiation area. The effects of this assist gas are (1) to actively burn and remove the melted workpiece, (2) to blow away the melted workpiece, and (3) to use the melted material as a lens for focusing the laser beam. For example, it may prevent the product from adhering to the surface. Note that when cutting resin plates, nitrogen or air may be used instead of oxygen to suppress combustion of the resin.

0004

The molten material melted by the laser beam irradiation is blown away from the cutting section and below the workpiece by the assist gas. This blown molten material re-solidifies during the scattering and becomes powder and scatters,
It scatters in a molten state and adheres to the work table in the shape of a crest or grid, or it bounces off the work table and adheres to the back side of the workpiece.

[0005] The molten material adhering to the back surface of the workpiece plate deteriorates processing quality and requires removal treatment after processing. Furthermore, when cutting resin plates, a large amount of smoke and odor are generated, creating a problem of deteriorating the working environment.

The purpose of the present invention is to eliminate these drawbacks, and in a laser processing machine used for cutting sheet metal and resin plates, melt generated during cutting may adhere to the back surface of the workpiece plate. It is an object of the present invention to provide a work table for a laser processing machine that can prevent the occurrence of smoke and odor from being scattered around.

[0007]

[Means for Solving the Problems] The above object is to provide a laser beam processing machine in which at least three pillar-shaped support members (1) are erected apart from each other and support a workpiece plate (5). In the work table for use, the columnar support member (1
) is formed with a water conduit (2), and a water spout (3) which is connected to the conduit (2) and opens horizontally at the tip of the columnar support member (1) is formed. This is achieved by a work table for laser processing machines. The tip of the columnar support member (1) is preferably replaceable, and the columnar support member (1) is preferably arranged in a houndstooth pattern.

[0008]

[Operation] FIG. 1 is a diagram explaining the principle, and shows a side view including a partial cross-sectional view of the vicinity of a columnar support member of a work table.

[0009] In the crest-shaped work table in which at least three columnar support members 1 are erected and spaced apart from each other, a water conduit 2 is formed in the columnar support member 1, and a conduit 2 is formed at the tip of the columnar support member 1. Since the water spout 3 is connected to the water conduit 2 and opens horizontally, the water supplied from the water main pipe 4 is showered horizontally from the water spout 3 through the water conduit 2. gushes out in a shape.

A workpiece plate 5 placed on a columnar support member 1 is irradiated with a laser beam 7 from a nozzle 6, and the molten material 9 blown away by the assist gas 8 immediately comes into contact with a shower of water and solidifies. However, water and water are also discharged and removed. Additionally, smoke and odors generated during cutting are dissolved in the shower-like water and removed in the same way. Therefore, the melt 9 is prevented from adhering to the back surface of the workpiece plate 5, and smoke and odor are also prevented from being scattered around.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of work tables for laser processing machines according to the present invention will be described below with reference to the drawings.

First Example FIG. 2 shows a configuration diagram of a work table for a laser processing machine. In the figure, the same parts as those shown in FIG. 1 are indicated by the same symbols, and 10 is a drainage tank having an inclined bottom surface.

Since the details of the columnar support member 1 are the same as those shown in the principle explanatory diagram of FIG. 1, the work table for a laser processing machine of the present invention will be explained with reference to FIG. 1 at the same time.

From the water supply main pipe 4 to the water conduit 2 of the columnar support member 1
The water supplied through the water spout 3 is ejected horizontally in the form of a shower. The molten material 9 of the workpiece plate material 5 irradiated with the laser beam 7 and blown away by the assist gas 8 is immediately cooled and solidified by the shower-like water, and the smoke is also dissolved in the shower-like water. Both fall into the drainage tank 10. The water containing the solidified melt and smoke is discharged using the slope of the bottom of the drain tank 10, purified by a filter (not shown), and then passed through the water pump (
Not shown. ) is again supplied to the main pipe 4 for use.

Note that the columnar support member 1 connected to the main pipe 4
As shown in FIG. 3, it is effective to arrange them alternately in a staggered pattern. Compared to the conventional method in which the support members 1 are arranged in a grid, the shower-like water ejected in a circular shape from each columnar support member 1 can cover the entire area of the workpiece more uniformly.

Second Example FIG. 4 shows a side view including a partial sectional view of the vicinity of a columnar support member of a work table.

A rod-shaped body 12 is disposed within the cylindrical body 11 with a distance maintained between it and the cylindrical body 11, and a rod-shaped body 12 is provided at the tip of the rod-shaped body 12 so as to maintain a distance between it and the end surface of the cylindrical body 11. Tip member 13
are screwed together to form the columnar support member 1. The lower surface of the tip member 13 is formed horizontally, and its size is generally the same as the end surface of the cylindrical body 11.

Water supplied from the water supply main pipe 4 is transferred to the cylindrical body 11
and the rod-shaped body 12 by ascending the water conduit 2 between the tip member 13 and the rod-shaped body 12.
The water collides with the lower surface of the body, and is ejected horizontally from the water spout 3 formed by the tip member 13 and the cylindrical body 11 in the form of a shower. The shower jets out uniformly around the entire circumference, making it possible to efficiently remove molten material and smoke. Further, even if the tip member 13 is damaged by laser beam irradiation, it can be removed from the rod-shaped body 12 and easily replaced. Note that the other configurations are the same as the first example.

[0019]

[Effects of the Invention] As explained above, in the work table for a laser processing machine according to the present invention, water is ejected horizontally in the form of a shower from around the tip of the rod-shaped support member that supports the workpiece plate. The molten material generated during cutting is immediately cooled and solidified by this shower-like water, preventing it from adhering to the back surface of the workpiece plate, and
Smoke and odors are also dissolved in the shower-like water and removed, preventing them from being scattered around, which greatly contributes to improving processing quality, shortening finishing processing time, and improving the working environment.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention.

FIG. 2 is a configuration diagram of a work table for a laser processing machine.

FIG. 3 is a layout diagram of columnar support members.

FIG. 4 is a side view including a partial cross-sectional view of the vicinity of the columnar support member.

[Explanation of symbols]

1 Column support member 2 Headrace waterway 3 Water spout 4 Water supply main pipe 5 Work plate material 6 Nozzle 7 Laser light 8 Assist gas 9 Melt 10 Drainage tank 11 Cylindrical body 12 Rod-shaped body 13 Tip member

Claims (3)

[Claims] Claims: 1. A work table for a laser processing machine having a sword-like shape for supporting a workpiece plate (5), wherein at least three columnar support members (1) are erected apart from each other and support a workpiece plate (5); A water conduit (2) is formed in (1), and a water spout (3) that is connected to the water conduit (2) and opens horizontally at the tip of the columnar support member (1) is formed. A work table for laser processing machines that is characterized by: 2. The work table for a laser processing machine according to claim 1, wherein the tip end of the columnar support member (1) is replaceable. 3. The work table for a laser processing machine according to claim 1, wherein the columnar support members (1) are arranged in a houndstooth pattern.