JPH03291188A - Laser beam machine - Google Patents

Abstract

PURPOSE:To improve the quality of a work by removing a flat part from the upper surface of an opening of a cutting plate and spraying compressed air to the external periphery of this opening. CONSTITUTION:On a laser beam machine 1 are arranged a worktable 9 to mount a work and a machining head 3 irradiating laser beam. The cutting plate 5 directly under the machining head 3 and opened upward is provided on the worktable 9 where plural free bearings 11 supporting the work W are arranged. A flat part on the upper surface of the opening 19 of this cutting plate 5 is removed and compressed air is sprayed from an exhaust nozzle 37 to the external periphery of the opening 19 of the cutting plate 5. Consequently, dust and spatters generated in time of laser beam machining can be prevented from adhering to the lower surface of the cutting plate.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a laser processing machine, and more particularly, to a cutting plate provided on a work table directly below a processing head of a laser processing machine. and regarding improvements to free bearings that support workpieces.

(Prior Art) Conventionally, a laser processing machine has a work table (for example, a side table, a center table, a front table, etc.) that is equipped with a plurality of free bearings that support the work.
A processing head that irradiates the workpiece with a laser beam is provided.

A cutting plate that opens upward is provided directly below the processing head, and the opening of the cutting plate generally has a horizontal top surface. Further, the sphere of the free bearing was made of steel or nylon.

(Problems to be Solved by the Invention) Incidentally, the cutting plate of the conventional laser processing machine described above has a horizontal top surface. For this reason, during cutting, a laser beam is irradiated and assist gas is injected, and spatter or dust scattered during cutting remains on the horizontal surface of the cutting plate, and the attached spatter or dust can cause scratches on the workpiece when it is moved. In particular, workpieces made of aluminum or the like tend to be easily scratched, which poses a quality problem.

Furthermore, since the free bearing sphere that supports the workpiece was made of steel balls or nylon, it was in point contact with the workpiece, and depending on the conveyance speed of the workpiece, a sliding phenomenon occurred, which caused the problem of scratches on the workpiece.

Furthermore, nylon has low heat resistance and abrasion resistance, for example, it softens at about 85° C., collapses and stops rotating, and its lifespan is within about one month. Due to this phenomenon,
It is difficult to maintain the free bearing height uniformly,
As mentioned above, there is a slight distance between the cutting plate and the workpiece (
Since there is only a gap of about 0.5+am), the work will rub against the cutting plate and cause scratches.

An object of the present invention is to eliminate the flat part on the upper surface of the opening of the cutting plate, and to improve the above-mentioned problems.
To provide a laser processing machine which prevents adhesion of spatter or dust by injecting compressed air from the outer periphery of an opening, and which improves quality without causing scratches on a workpiece.

Another object of this invention is to create a laser processing machine in which the free bearing sphere is made of heat-resistant and abrasion-resistant material to prolong its life and to improve quality without causing scratches on the workpiece. Our goal is to provide the following.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above objects, the present invention provides a laser processing machine equipped with a work table on which a work is placed and a processing head that irradiates a laser beam onto the work. The work table is equipped with a plurality of free bearings that support the processing head, and is provided with a cutting plate that opens upward and is located directly below the processing head. A laser processing machine was constructed by providing a jet port for blowing compressed air on the outer periphery of the part.

Further, the present invention provides a laser processing machine including a work table on which a work is placed and a processing head that irradiates the work with a laser beam, in which at least one of the free bearings disposed on the work table is attached to the cutting plate. The surrounding free bearing sphere is heat resistant,
The laser processing machine was constructed using a material with wear resistance.

(Function) By adopting the laser processing machine of the present invention, there is no flat part on the upper surface of the opening of the cutting plate provided directly below the processing head, and compressed air is ejected from the outer periphery of this opening, so that the laser beam Spatter and dust generated during cutting of the workpiece will not adhere to the top surface of the opening of the cutting plate. Therefore, even if the work touches the cutting plate during transport, the work will not be damaged.

In addition, at least the free bearing around the cutting plate that supports the workpiece is made of heat-resistant and abrasion-resistant material, allowing for smooth rotation and a long service life. The gap between the bearings is maintained, and there is no slippage between the workpiece and the free bearing, which prevents damage to the workpiece.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

ji! 1 and 2, a laser processing machine 1
is provided with a processing head 3 (partially not shown) that emits a laser beam and ejects assist gas. A cutting plate 5 that opens upward and is directly below the processing head 3 is buried in the center of the free bearing holder, and the free bearing holder 7 is installed on the work table 9. A free bearing 11.13 is provided.

Note that a nozzle 15 is integrally provided at the tip of the processing head 3.

With the above configuration, the workpiece W is free bearing 11.1
The cutting plate 5 and the lower surface of the workpiece W are carried in and carried out while being supported on the cutting plate 3. As shown in FIG.

Then, a laser beam is irradiated from a nozzle 15 provided in the processing head 3, and assist gas is injected to perform a predetermined cutting process on the workpiece W.

The cutting plate 5 is embedded in the freebear holder 7, and has a trumpet-shaped hole 17 facing downward through which the laser beam passes through the center, and an arcuate surface 21 formed on the upper surface of the opening 19. The locking groove 23 is formed in an annular shape. Note that this locking groove 23 has a trumpet shape whose diameter increases downwardly, and the tip of a set screw 27 screwed into a threaded portion 25 provided on the freebear holder 7 comes into contact with this locking groove 23. , the cutting plate 5 is fixed to the freebear holder 7.

A freebear holder 7 equipped with a cutting plate 5 is fixed to a work table 9 by a plurality of bolts 29, and a hole 31 is formed downward in a trumpet shape in the center of the freebear holder 7. A large-diameter dust collecting vibrator 33 is vertically mounted on the lower surface of the holder by bolts 35.

Note that the hole 17 provided in the cutting plate 5 and the hole 31 provided in the freebear holder 7 have a trumpet shape to prevent spatter and dust generated during laser processing from adhering to them. By applying hard chrome plating or the like to the surfaces of the holes 17 and 31, it becomes even more difficult for spatter to adhere.

The free bear holder 7 includes a cutting plate 5.
Three compressed air passages each having a jet port 37 for jetting out compressed air are provided at a plurality of locations along the outer periphery of the cylinder, and are communicated with a compressed air supply source (not shown) through piping or the like.

With the above configuration, spatter and dust generated during laser processing are blown away by compressed air jetted along the outer periphery of the cutting plate 5.
Since the upper surface is an arcuate surface 21 and has no flat portion, spatter and dust do not adhere to it. Therefore, the lower surface of the workpiece W is not scratched by spatter or dust during transport of the workpiece.

Furthermore, in this embodiment, at least the free bearings 1 and 13 spheres 41 and 43 provided around the cutting plate 5 are made of a heat-resistant and abrasion-resistant material (for example, aramid resin).

Note that the structure of the free bearings 11 and 13 is generally known, and detailed explanation will be omitted.

Aramid resin, which is a material with heat resistance and abrasion resistance, has a heat resistance temperature of approximately 2
It has a high temperature of 20°C, has high strength and excellent wear resistance, and has a service life about 5 times longer than conventional products. Therefore, no slippage occurs between the free bearing 11.13 and the workpiece W, and smooth rotation is maintained, making it easy to expose the top surface of the workpiece W by the free bearing 11.13. Furthermore, the dimension X of the gap between the cutting plate 5 and the workpiece W is always kept constant, so that the workpiece W is not damaged and the life of the free bearings 11 and 13 can be extended.

Note that the present invention is not limited to the embodiments described above, and can be implemented in other embodiments by making appropriate changes.

〔Effect of the invention〕

As can be understood from the description of the embodiments above, according to the present invention, by eliminating the flat part on the upper surface of the opening of the cutting plate and blowing compressed air around the outer periphery of this opening, This prevents spatter and dust from adhering to the top surface of the cutting plate. Therefore, it is possible to improve the quality of the workpiece without causing any flaws.

In addition, at least the sphere of the free bearing provided around the cutting plate is made of heat-resistant and abrasion-resistant aramid resin, etc., so the life of the free bearing is extended and the workpiece is not damaged and quality is improved. It is possible to improve the

[Brief explanation of the drawing]

1 and 2 show the main parts of this invention, FIG. 1 is a sectional view of a work table in a laser processing machine, and FIG.
The figure is an enlarged cross-sectional view of the section viewed from the ■ arrow in FIG. 1. 1... Laser processing machine 3... Processing head 5... Cutting plate 9... Work table 11... Free bearing 13... 1 free bearing... Opening 37... Spout nozzle 41... Sphere 43... Sphere

Claims (2)

[Claims] (1) A laser processing machine is equipped with a work table on which a work is placed and a processing head that irradiates the work with a laser beam. A laser characterized in that a cutting plate is provided directly below the opening and opens upward, and the top surface of the opening of the cutting plate has no flat part, and a jet nozzle for blowing compressed air is provided around the outer periphery of the opening of the cutting plate. Processing machine. (2) A laser processing machine equipped with a work table on which a work is placed and a processing head that irradiates a laser beam onto the work, and among the free bearings arranged on the work table, at least the free bearings are provided around the cutting plate. A laser processing machine characterized by a free bearing made of heat-resistant and wear-resistant material.