JPS6235598Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a nozzle assembly for a laser processing machine, and more specifically, it is easy to attach and detach from the laser beam irradiation part and aligns the assist gas nozzle and cooling water nozzle with respect to the laser beam optical axis. relates to accurate and easy nozzle assembly.

First, the background of implementing the present invention will be explained.

FIG. 1 shows a laser processing machine 1 equipped with an embodiment of the present invention. The laser processing machine 1 includes a laser oscillation device section 3, a gas cooling adjustment section 5, a laser beam guide section 7, and a laser beam irradiation section 9. The material is irradiated with a laser beam while being moved and positioned by the material moving and positioning device 15, and the oxidized gas is discharged together with the slag to the slag suction and discharge section 17.

The laser beam irradiation section 9 of the laser processing machine 1 is a section that bends the laser beam vertically at the tip of the laser beam guide section 7 and focuses the beam onto the material using an optical lens. For example, in order to obtain an accurate and beautiful cut surface, it is necessary to align the optical axis center 19 of the laser beam as a heat source, the assist gas nozzle 21 that promotes the melting of the material, and the cooling water nozzle 23 (19, 21, 23) surrounding it. In both cases, it is necessary to align the axes of the shafts (see Fig. 6 et seq.) accurately.

In addition, the nozzle assembly 25 of the present invention can be easily used for replacing the above-mentioned optical lens or for maintenance and inspection.
(assembly) must be removable from a part of the laser beam irradiation section 9.

In the conventional laser processing machine 1, in order to align the assist gas nozzle 21 and the cooling water nozzle 23 with the laser beam optical axis center 19, the conventional laser processing machine 1 relies on a screw rod or the like that is pushed in from three sides at center angle positions 120 degrees apart, for example. It was very time-consuming because the gas pipes and water pipes had to be removed from the nozzle assembly 25, so the time lost until restarting was very large, and it was an inconvenience that required skill. It was hot.

The present invention has been made to solve the above-mentioned disadvantages, and preferred embodiments thereof will be described in detail below with reference to the drawings.

First, nozzle assembly 2 which is an embodiment of the present invention
5 has a connecting pin 27 as a connecting device on its upper end surface.
A plurality of (three in this embodiment) are fixedly attached by an annular connecting pin holding member 29.

On the other hand, as shown in FIGS. 2, 3, and 6, below the laser beam irradiation section 9 is a flange section 31 (see FIG. 6) having a hole that engages with the aforementioned connecting pin 27. A tubular body 33 is provided, on which a rocking plate 37 is mounted by means of a snap spring 35.

The swing plate 37 is provided with a large-diameter hole 39 into which the head of the connecting pin 27 is fitted, and a small-diameter hole (not shown) through which the neck passes, and an arc-shaped long hole 41 connecting the two holes. There are three slopes 43 on both sides that slope toward the top.

Further, an arc-shaped elongated hole 45 enclosing the bolt 44 installed in the flange portion 31 described above, and a nozzle assembly 2 are provided.
Since a lever 47 is provided to manually swing the swing plate 37 from the front of the nozzle assembly 25, the nozzle assembly 25 can be easily moved by operating the lever 47 left and right to swing the swing plate 37. It can be attached and detached from the laser beam irradiation section 9.

The nozzle assembly 25 includes an outer housing 49 to which the above-mentioned connecting pin holding member 29 is fixed at the upper end, an inner housing 51 inside the outer housing 49, a funnel-shaped member 53 provided inside the outer housing 49, and a bottom cover member 55 at the lower end. It is configured.

The inner housing 51 and the funnel-shaped member 53 are stacked vertically and are held between the inner ceiling of the outer housing 49 and a ring member 57 provided on the upper surface of the bottom cover member 55 so as to be horizontally movable.

Therefore, as is clear from FIG. 8, the X
The inner housing 51, which is equipped with a female thread 61 that is screwed into the shaft adjustment screw 59, is guided into a guide hole 65 formed in the outer housing 49 by a guide pin 63 installed 180 degrees apart, and is accurately rotated in the X-axis direction. Easy to position.

Similarly, a rotatable Y is provided in the inner housing 51.
The shaft adjustment screw 67 is threadedly engaged with a female screw 69 provided on the funnel-shaped member 53, and a guide pin 71 installed in the funnel-shaped member 53 at a position 180 degrees apart from the Y-axis adjustment screw 67 is inserted into the inner housing 51. It is guided through a guide hole 73 provided.

Therefore, as is clear from FIG. 8, by operating the Y-axis adjustment screw 67 outside the outer housing 49, it is easy to accurately adjust the position of the funnel-shaped member 53 in the Y-axis direction.

The above-mentioned funnel-shaped member 53 has a cooling water nozzle holding member 75 fixed to the outer periphery of its lower end, and the assist gas nozzle 21 is fixed to the inside of the lower end, and the cooling water nozzle holding member 75 holds the cooling water nozzle 23 in both funnel-shaped members. 53 and are fixed with their cores aligned.

As shown in FIG. 6, a cooling water inlet 77 is provided between the cooling water nozzle 23 and the cooling water nozzle holding member 75 described above. A workpiece (not shown) is irradiated or sprayed from directly above through a cooling water nozzle 23.

What is indicated by a broken line in the upper left connecting pin holding member 29 in FIG. housing 49
Inside, the laser beam is guided toward the optical axis center 19 side and simultaneously guided outside the outer housing 49 and connected to a pressure gauge 81 .

The bottom cover member 55 described above has a ring member 5 on the upper side.
7 supports the funnel-shaped member 53, and at the same time, ball bearings 83 are provided below around each nozzle to contact the workpiece and keep each nozzle at a constant distance from the workpiece. It has several.

Between the ball bearings 83 described above, a cooling water suction and discharge pipe 87 led from the upper collecting block 85 is installed horizontally as shown in FIG. A cylindrical suction nozzle 89 for increasing the suction effect is provided in between and engaged with the vertical groove 93 whose directionality is maintained by a pin 91.

What is shown by the two-dot chain line at the upper left end of FIG. As described above, the nozzle assembly 25 of the present invention can be easily attached and detached by operating the lever 47.

Another cooling water introduction hole 97 is similarly provided on the collecting block 85 shown in FIG. , is connected to the cooling water inlet 77 described above.

In the apparatus according to the embodiment of the present invention described in detail above, the nozzle assembly 25 can be moved by simply operating only one lever 47.
The assist gas can be attached or detached from the laser beam irradiation unit 9 at will. The inlet 79 of the cooling water, the cooling water inlet 97, and the cooling water suction/discharge pipe 87 can be connected and separated at the same time. Since the funnel-shaped member 57 can be accurately moved and positioned by operating the screw 67 of the device, the inconveniences of the conventional device can be reliably solved.

It should be noted that it is obvious that changes in design are possible within the scope of the technical idea of the present invention.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a laser processing machine, Fig. 2 is a front view of the laser beam irradiation part of the laser processing machine implementing the present invention, Fig. 3 is a cross-sectional view taken along the - sectional arrow in Fig. 2, and Fig. 4 is a front view of the device of this embodiment, FIG. 5 is a plan view of the same as above, FIG.
FIG. 7 is a cross-sectional view taken in the direction of the - arrow in FIG. 5, and FIG. 8 is a cross-sectional view taken in the direction indicated by the - arrow in FIG. Explanation of the symbols representing the main parts of the drawing, 1...
Laser processing machine, 9... Laser beam irradiation section, 19
... Laser beam optical axis center, 21 ... Assist gas nozzle, 23 ... Cooling water nozzle, 25 ... Nozzle assembly, 27 ... Connection pin, 37 ... Rocking plate,
53...Funnel-shaped member, 59...X-axis adjustment screw, 6
7...Y-axis adjustment screw.

Claims (1)

[Scope of utility model registration request] A cylindrical inner housing that is slidable in the radial direction is provided within the cylindrical outer housing, and a funnel that is slidable in the radial direction within the inner housing and holds an assist gas nozzle and a cooling water nozzle concentrically. A shaped member is provided,
a position adjusting device for moving the inner housing in a radial direction with respect to the outer housing; a position adjusting device for moving the funnel-shaped member in a direction perpendicular to the direction with respect to the inner housing; A nozzle assembly for a laser processing machine, characterized in that a coupling device is provided on the upper part of the laser processing machine and can be detachably attached to the laser processing machine.