JPH106068A - Nozzle chip adapter of laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of defective cutting and to improve cutting precision without containing a machining gas even though the end surface of an adapter comes into contact with a stock to be cut by fitting the sleeve shaped adapter suitably releasing the machining gas into the end part of a nozzle in the case of emitting carbon dioxide laser beam and executing cutting. SOLUTION: Gas releasing grooves 4 of about three millimeters in width B and five millimeters in height H are formed with a desired interval in plural places on the end circumference of the adapter main body 3 fitting into the nozzle 1, and the adapter main body 3 is fitted and fixed to the nozzle taper part with an attaching ring 5 and a set screw 6. Further, a prescribed projecting length A of the adapter end from the end of the nozzle 1 in the case of fitting the adapter main body 3 into the nozzle 1 is set based on the outer shape of taper of the nozzle 1 and the inner diameter of taper of the adapter main body 3. The projecting length A of about one point five millimeters is effective, but not limited to this dimension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle tip adapter in a laser beam machine for emitting a processing gas laser beam from a nozzle.

[0002]

2. Description of the Related Art As shown in FIG. 2, in order to obtain a condition of a laser processing machine which emits a processing gas laser beam using a gas (CO ₂ ) to amplify light having a wavelength in an infrared region from a nozzle 1, The gap C between the work W1 and the tip of the nozzle 1 is taught at, for example, 3 mm, and cutting is performed by inputting processing conditions.

[0003]

By the way, as shown in FIG. 4, when processing is performed using the height sensor 7, the height sensor 7 cannot be measured due to the range 8 which is affected by the CO ₂ laser beam during cutting. Stops. In addition, even when the workpiece comes off the edge of the work, measurement becomes impossible and processing stops, so teaching is performed in the cutting direction toward the height sensor 7,
If the figure is cut behind, the machining is stopped. Therefore, it is necessary to teach the height sensor 7 to be turned off at the position after the cutting. Therefore, the sensor function is stopped.

As shown in FIG. 3, when the sensor function is stopped and the work W2 having a strain is cut, as shown in FIG. 3, the nozzle 1 comes into contact with the work W2.
The tip of the nozzle is damaged and the processing gas is no longer ejected from the nozzle 1, so that the cut surface is burned or melted, resulting in defective cutting.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laser beam machine which emits a processing gas laser beam from a nozzle, to prevent the tip of the nozzle from coming into contact with a workpiece, and to improve the workpiece cutting precision.

[0006]

According to the present invention, there is provided a laser processing machine for emitting a processing gas laser beam from a nozzle, wherein the tip of a sleeve-shaped adapter body taperedly fitted to the nozzle is provided. A relief groove for a processing gas is provided, and a front end surface is fitted to the nozzle while maintaining a predetermined protruding length from the front end of the nozzle.

[0007]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a nozzle of a laser processing machine. The nozzle 1 has a tapered outer shape 2, and a processing gas laser beam using a gas (CO ₂ ) to amplify light having a wavelength in an infrared region. To cut or weld a workpiece such as an iron plate.

Reference numeral 3 denotes a sleeve-shaped adapter body which is taperedly fitted to the nozzle 1. An escape groove 4 for processing gas is provided at the tip of the adapter body 3. It is desirable that the processing gas escape groove 4 is provided at a plurality of locations on the circumference of the distal end of the adapter body 3 at required intervals. Also,
The width B of the processing gas escape groove 4 is 3 mm, and the height H is 5 mm.
Although the degree is effective, it is not limited to this dimension.

In order to fix the adapter body 3 to the nozzle 1 by taper fitting, a mounting ring 5 is integrally provided at the upper end of the adapter body 3 and is fixed by a set screw 6.

A mounting ring 5 is taperedly fitted to the nozzle 1.
The adapter body 3 fixed by the above is set by the tapered outer shape 2 of the nozzle 1 and the tapered inner shape of the adapter body 3 so that the distal end surface thereof maintains a predetermined protruding length A from the distal end of the nozzle 1. It is effective that the protruding length A of the distal end face of the adapter body 3 is about 1.5 mm, but it is not limited to this dimension.

Since the present invention has the above-described configuration, FIG.
When the contact is made with any of the flat work W1 shown in FIG. 4 and the distorted work W2 shown in FIG. 4, it is the tip surface of the adapter body 3 and the tip of the nozzle 1 is directly in the work W1,
The tip of the nozzle 1 is protected by the adapter body 3 without contact with W2.

Even if the distal end surface of the adapter body 3 comes into contact with the workpieces W1 and W2, the processing gas ejected from the nozzle 1 is smoothly released from the escape groove 4, and the processing gas is discharged to the distal end portion of the adapter body 3. Prevent containment.

Further, since the adapter body 3 is fitted using the tapered outer shape 2 of the nozzle 1, the height does not change when the nozzle is replaced.

Accordingly, the tip of the nozzle 1 is damaged by contact with the work, and the processing gas is no longer spouted, thereby preventing cutting defects such as burning or melting of the cut surface of the work.

[0015]

As described above, according to the present invention, a processing gas escape groove is provided at the tip of the sleeve-shaped adapter body which is tapered into the nozzle, and the tip surface has a predetermined protruding length from the tip of the nozzle. Holds and fits the nozzle, so the tip of the nozzle is protected, and even if the adapter body contacts the workpiece, the processing gas is smoothly released from the escape groove, and the workpiece cutting accuracy and nozzle durability And the processing speed can be increased.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is an explanatory diagram of teaching of a gap between a work and a conventional nozzle.

FIG. 3 is an explanatory view in which a conventional nozzle comes in contact with a strained workpiece.

FIG. 4 is an explanatory diagram of a problem when processing using a height sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle 2 Tapered outer shape 3 Adapter body 4 Escape groove for processing gas 5 Mounting ring 6 Set screw

Claims (1)

[Claims] 1. A laser processing machine for emitting a processing gas laser beam from a nozzle, wherein a relief groove for the processing gas is provided at a distal end of a sleeve-shaped adapter body taperedly fitted to the nozzle, and a distal end surface of the adapter body is provided at the distal end. A nozzle tip adapter for a laser beam machine, wherein the nozzle tip adapter is fitted to the nozzle while maintaining a predetermined protruding length from a tip.