JPH01166895A - Laser beam machine provided with exhauster - Google Patents

Abstract

PURPOSE:To improve exhaust efficiency by exhausting materials to be exhausted such as gas and fume being generated through hollow parts of conical pins to hold a material to be machined from through holes at the time of laser beam machining. CONSTITUTION:A laser beam 2 of a machining head 1 is condensed by a condenser lens 3 and the condensed laser beam 4 is moved above the material 6 to be machined by moving the machining head 1 to execute cutting or boring on the material 6 to be machined. At this time, assisting gas is carried onto the same axis as the laser beam 2 to assist machining of the material 6 to be machined. At the time of machining the material 6 to be machined, although the materials A to be exhausted such as the fume and gas are generated, the materials A to be exhausted are inhaled into the hollow parts of the conical pins 100 from the through holes 101 of the conical pins 100 and exhausted outdoors from the title exhauster 8b via intermediate ducts 102. Accordingly, the exhaust efficiency is improved and in accordance with this, even the exhauster 8b with reduced size will do.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser processing machine equipped with an exhaust device with high exhaust efficiency.

[Prior Art] FIG. 3 is a perspective view showing an example of a conventional exhaust device in a moving head type laser processing machine. In the figure, (1
) is a movable processing head, (2) is a laser beam, (3
) is a lens that focuses the laser beam (2), (4) is the laser beam focused by the focusing lens (3), (5)
is an assist gas made of oxygen gas, etc., which is flowed coaxially with the laser beam (2) and helps process the workpiece. (
6) is the workpiece, (7) is a plurality of conical pins that place and hold the workpiece (6), and (8) is the gas, fume, etc. generated when processing the workpiece (6). This is an exhaust device that exhausts the exhaust gas.

FIG. 4 is a perspective view showing an example of a conventional exhaust system for a workpiece moving type laser processing machine, and (8a) is a perspective view showing an example of a conventional exhaust system for a workpiece moving type laser processing machine.
) is an exhaust device that exhausts exhaust such as gas and fume generated during processing. In addition, other parts are in the third section.
This is the same as the example in the figure.

Next, the operation will be explained. As shown in Figure 3, the laser beam (2) of the processing head (1) is transmitted through the condensing lens (3).
The energy density of the focused laser beam (4) is 105 to 108 ν/c-.

The laser beam (4) thus focused is moved over the workpiece (6) by moving the processing head (1), and cuts or drills the workpiece (6). At this time, the assist gas (6) is connected to the laser beam (2).
It flows coaxially with the workpiece (6) and helps machining the workpiece (6). During processing of the workpiece (6), exhaust such as fume and gas is generated, and this exhaust is exhausted to the outside by the exhaust device (8).

On the other hand, in the case of the laser processing machine shown in Fig. 4, unlike the case shown in Fig. 3, the workpiece (6) itself is moved and the workpiece (6)
) is cut or drilled, and the generated fumes, soot, and other exhaust substances are exhausted to the outside by an exhaust system (8a).

[Problems to be Solved by the Invention] According to the conventional exhaust system for the laser processing machine configured as described above, the processing head itself is moved to remove the workpiece, as in the case shown in FIG. When machining, it is not possible to bring an exhaust device directly close to the workpiece being machined to draw suction. For this reason, all the exhaust consisting of gas, fume, etc. must be sucked in from one side of the workpiece, resulting in a problem that the exhaust device becomes large.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a laser processing machine equipped with an exhaust device that can efficiently exhaust exhaust gases.

[Means for solving the problems] The present invention has been made to achieve the above objects, and
A plurality of conical pins that hold the workpiece are hollow, and the hollow part of the conical pins and the outer periphery are communicated with each other through a plurality of through holes. The present invention provides a laser processing machine equipped with an exhaust device that exhausts generated gas, fumes, and other exhaust substances.

[Operation] The processing head of the co-laser processing machine is moved to process the workpiece, and exhaust such as gas and fume generated during laser processing is exhausted through the through hole and hollow part provided in the conical pin.

[Embodiment of the Invention] FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is a sectional view of a main part of FIG. 1. Note that the same or equivalent parts as in FIG. 3 are designated by the same reference numerals, and the explanation thereof will be omitted. (100) is a hollow conical pin on which the workpiece (6) is placed and held;
1) is a plurality of through holes communicating from the outer circumferential surface of the conical pin (100) to the hollow part, and (102) is each conical pin (100).
This is an intermediate duct that supports the conical pins (10G) at regular intervals and connects these conical pins (10G) and the exhaust device (8b).

A detailed explanation of the present invention configured as above is as follows. Note that the laser processing method is the same as in the case of FIG. 3, so a description thereof will be omitted.

Exhaust materials A such as gas and fumes generated by laser processing are sucked into the hollow part of the conical pin (100) through the through hole (101) of the conical pin (100), and are sucked into the hollow part of the conical pin (100).
02) from the exhaust device (8b) to the outside.

In the above explanation, the intermediate duct (102) is directly connected to the exhaust system (8b), but an on-off valve is provided between them, and this on-off valve is controlled manually or by an electric signal from an NC. Good too. Alternatively, only the hollow conical pin (100) located closest to the part being laser processed by the processing head (1) may be communicated with the exhaust device (8b). Since suction stops in areas that are not being used, exhaust efficiency can be further improved.

[Effects of the Invention] As is clear from the above description, according to the present invention, the exhaust gas is sucked through the hollow conical pins arranged at regular intervals, so the exhaust efficiency is improved, and in particular, the exhaust gas is sucked in. If the conical pin is selected closest to the part being laser processed, the exhaust efficiency will be further improved, and this will allow the exhaust device to be smaller, which has the effect of making the device cheaper. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part of FIG. FIG. 4 is a perspective view showing an example of a conventional exhaust system for a workpiece moving type laser processing machine. (1)...Processing head, (2)...Laser beam,
(3)...Condensing lens, (4)...Focused laser beam, (5)...Assist gas, (6)...Workpiece, (8b)...Exhaust device , (100)...Hollow conical pin, (101)...Through hole, (102)...
...Intermediate duct. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A processing head that focuses a laser beam and flows a processing gas coaxially with the laser beam, a plurality of conical pins that support a workpiece, and gases, fumes, etc. generated during processing of the workpiece. In the laser processing machine, the conical pin holding the workpiece is hollow, and the hollow part and the outer periphery are communicated through a plurality of through holes, and the conical pin holding the workpiece is hollow. 1. A laser processing machine equipped with an exhaust device, characterized in that a part and the exhaust device are connected to each other. (2) An exhaust system according to claim (1), characterized in that a plurality of hollow conical pins are each connected to an intermediate duct, and these intermediate ducts are connected to the exhaust system. Laser processing machine. (3) Exhaust according to claim (2), characterized in that an on-off valve is provided between each intermediate duct connected with a conical pin and the exhaust device, and the on-off valve is opened and closed by a signal from an NC. Laser processing machine with equipment. (4) An exhaust device according to claim (2), characterized in that an on-off valve is provided between each intermediate duct connected to the conical pin and the exhaust device, and the on-off valve is manually opened and closed. Laser processing machine.