JPS63188490A - Laser beam machining head - Google Patents

Abstract

PURPOSE:To prevent the danger from being caused on a man and a substance by the scattering of the reflected light generated at the time of cutting and welding copper and aluminum material, etc., to the circumference by providing a surrounding frame having through holes on the outside periphery part of a nozzle chip so that reflected light from a work generated during machining is not scattered to the outside. CONSTITUTION:A laser beam 8 is stopped down by a convergent lens 1 and projected on a work 11 set in the vicinity of the focusing position. At the same time, machining gas 5 is blown against the projecting position of the laser beam 8 to perform the machining while moving the whole of a machining head or the work 11. The scattering to the outside of laser light 12a reflected on the circumference of the top of the work 11 during machining is shaded by the surrounding frame 14a of the outside periphery of the nozzle chip 14. Furthermore, the machining is performed while releasing outgas 13 generated at the same time to the outside through two through holes 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser processing head used for cutting and welding materials such as copper and aluminum materials that have a high reflectance to a 00 m laser beam.

[Conventional technology]

No. 8 (2) is a sectional view showing a conventional laser processing head of this type. In the figure, 1 is a focusing lens, and a lens holder 2 and a lens receiver 3 are configured to hold this focusing lens l. There is. Reference numeral 4 denotes a holder nurse that accommodates the above 1 to 3, and has a path for processing gas 5 on the side periphery. A nozzle 6 has a nozzle tip 7 at its tip, which blocks the processing gas 5 from the atmosphere and guides it to the nozzle tip 7. Nao,
The nozzle tip 7 focuses the processing gas 5 and
It has a round hole 7a for passing the laser beam 8 focused by the focusing lens 1, and also has an O-ring 9 to prevent the processing gas 5 from leaking from the joint between the nozzle 6 and the nozzle tip 7. There is. IO is a holder presser, and the holder case 4
and the nozzle 6. □11 indicates the workpiece, 1 indicates the reflected light of the laser beam generated during processing, and 1
2b shows a laser beam that has passed through the workpiece 11. Another factor is outgas generated during processing.

Next, the operation will be explained. The laser beam 8 is focused by the focusing lens 1, and the focal point is n, ! A workpiece 11 set nearby is irradiated. At the same time, processing gas 5 is blown onto the irradiation position of the laser beam 8, and processing is performed while moving the entire processing head or the workpiece 11. By the way, during this processing, the laser beam 1 reflected around the soil surface of the workpiece 11
2a and a laser beam 12b that has penetrated the workpiece 11, and at the same time outgas 13 is generated.

[Problem that the invention seeks to solve]

Conventional processing heads are configured as described above, and among the reflected light generated when cutting and welding copper and aluminum materials,
The reflected light scattered around the processing head cannot be blocked, causing human and
There was a risk of physical harm.

This invention was made to solve the above problems.
It is an object of the present invention to provide an apparatus that can prevent reflected light 1jla during processing from being scattered around.

[Means for solving problems]

The processing head according to the present invention is provided with a concave frame on the outer periphery of the nozzle tip U, and a through hole is provided in this outer periphery.

[Effect]

The nozzle chip of this invention prevents reflected light from the workpiece and spatter generated during processing from scattering outside, eliminating the danger to surrounding people and objects, and eliminating laser radiation. Improve the safety of processing machines.

〔Example〕

An embodiment of the present invention will be described below regarding (2).

In FIGS. 1 and 2, a nozzle tip 14 is screwed together with the nozzle 6, and an O-ring 9 is attached thereto to prevent processing gas from leaking to the outside. Further, this nozzle chip 14 has a surrounding frame 14 on its outer periphery.
a, and two through holes 141 for blocking the scattering of reflected light beams generated during processing of copper, aluminum, etc. to the outside, and for allowing outgas 13 generated during processing to escape to the outside.
) and the other configurations are the same as those shown in FIG. 8 above, so explanations will be omitted.

Since the present invention is constructed as described above, it blocks reflected light and spatter generated during processing of materials with high reflectivity such as copper and aluminum, and also allows outgas 13 during processing to escape to the outside of the processing head. Processing is carried out while

In the above embodiment, the two holes 14b on the circumference of the nozzle tip 14 are provided for escape of outgas 13 generated during cutting and welding, but they are also provided for supplying shielding gas during welding. It can also be used as It goes without saying that the number of holes is not limited to two.

〔Effect of the invention〕

As described above, according to the present invention, the structure of the nozzle tip is such that the reflected light from the workpiece that occurs during processing is not scattered to the outside, so that human and material safety can be increased. There is an effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a laser processing head according to an embodiment of the present invention, FIG. 2 is an external perspective view of FIG. 1, and FIG. 8 is a sectional view of a conventional laser processing head. is a focusing lens, 5 is a processing gas, 6 is a nozzle, 8
1 is a laser beam, 11 is a workpiece, MU is reflected light, 13 is an outgas, 14 is a nozzle tip, 14a is a surrounding frame, 1
4b is a through hole. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a device that conducts cutting and welding by guiding laser light emitted from a laser oscillator through a focusing lens to a nozzle tip and irradiating it onto a workpiece, an enclosure having a through hole on the outer periphery of the nozzle tip. A laser processing head characterized in that a frame is provided to prevent reflected light during processing from being scattered outside. (2) The laser processing head according to claim 1, wherein a plurality of through holes are provided.