JPS63108986A - Machining head device for co2 laser beam machine - Google Patents

Abstract

PURPOSE:To accurately teach the machining position of a work to a laser beam machine main body and store it therein by providing an adjusting mechanism to fit He-Ne laser beam converged on the work to a burning spot formed on the work by CO2 laser beam. CONSTITUTION:A test piece for the trial machining is prepared in advance and the spot machining is performed on the test piece by the CO2 laser beam with low output. Next, the He-Ne laser beam L2 is projected on the test piece and when the converged point is deviated from the spot, an adjusting screw 6 is operated and a visible light point of the He-Ne laser beam L2 is fitted to the spot. Afterward, the machining part of the work 5 is traced by the He-Ne laser light L2 and the machining position is taught and stored. In this way, the work 5 can be machined accurately with excellent accuracy. Furthermore, the work 5 is prevented from being damaged by the trial machining.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a laser processing head device for a CO2 laser processing machine, and particularly to a processing head for a CO2 laser processing machine that is capable of storing instructions for processing a processing section using He-Ne laser light. Regarding equipment.

[Prior Art] A conventional device of this kind will be explained based on FIG. This figure is an enlarged sectional view showing a processing head device of a CO2 laser processing machine. CO2 laser light (Ll) or He
-Ne laser light (Ll) is transmitted from an oscillator (not shown), focused on a condensing lens (2) attached to the end of the transmission line (1), and then passed through a tapered adapter (Ll) connected to the transmission line (1). 3), is injected from a nozzle (4) attached to the tip of the adapter (3), and reaches the workpiece (5).

Among the two types of laser beams mentioned above, CO2 laser beam (Ll)
is for processing the workpiece (5), and the other He--Ne laser light (Ll) is a visible laser light used to teach the laser processing machine the part to be processed on the workpiece (5). In other words,
When machining the first workpiece (5), this workpiece (5)
) 1e-He laser light (L
1) to drive the processing head device along the processing area to teach and store the processing position in the main body of the laser processing machine. Once memorized, when the same workpiece (5) is to be processed in earnest next time, the memorized He-He laser beam (Ll)
The CO2 laser beam (L+) moves according to the teaching content of
The same processing will be done.

[Problems to be solved by the invention] However, since the CO2 laser beam (L+) and the He-Me laser beam (Ll) have different wavelengths, they cannot be focused through the same condensing lens (2). When emitted, the He-Ne laser beam (Ll), which has a shorter wavelength than the CO2 laser beam (Ll), has a focal point inside the adapter (3), and the laser beam (Ll) that reaches the workpiece (5) has a spot shape as shown in the figure. It illuminates a visible circle with a small diameter, and is used for teaching purposes.)
The le-He laser beam (Ll) spreads over the machining area, making it inaccurate. In such a case, the approximate machining area is memorized, and then a low-output CO2 laser beam (Ll) is applied.
After trial machining in step 1) and confirming the correct position, the actual machining begins, but while determining the exact position of the 002 laser beam (1), the workpiece (5) was scratched in several places. Unavoidably, it was time-consuming and the He-Ne laser beam (Ll) could not fully fulfill its role as a teaching purpose.

The present invention has been made in view of the above-mentioned problems.
To provide a processing head device for a CO2 laser processing machine that can accurately teach using He laser light and perform main processing without causing many scratches during trial processing as in the conventional method.

[Means for Solving the Problems] The present invention provides, in addition to a laser beam condensing lens in a processing head device of a laser processing machine,
A small-diameter condensing lens is installed on the workpiece side from the condensing point of the He laser beam, and the condensing point of the He-Ne laser beam is formed on the workpiece by the small-diameter condensing lens, and the small-diameter condensing lens A processing head device is constructed by providing an adjustment mechanism for movably adjusting the lens in a direction perpendicular to the optical axis.

[Operation] According to the present invention, the He--Ne laser beam focused on the workpiece can be adjusted by the adjustment mechanism so that it coincides with the burning spot formed on the workpiece by the CO2 laser beam. Thereafter, the processing position of the workpiece can be accurately taught and stored in the main body of the laser processing machine using the He-Ne laser beam.

[Example] The present invention will be described below based on an example shown in FIGS. 1(a) and 1(b). For convenience of explanation, parts that are the same as or equivalent to those in the prior art are given the same reference numerals, and the description will focus on the features of the present invention.

The adapter (3) is connected to the laser beam transmission line (1) in the same way as before, but the difference from the conventional one is that the transmission line (1)
A groove (la) is formed at the end to hold the flange (3a) of the adapter (3). The outer diameter of the groove (la) is larger than that of the flange (3a), and the flange (3a) is loosely fitted into the groove (1a). 3) is configured to move in a direction perpendicular to the optical axis of the condenser lens (2).

Further, a small diameter condensing lens (7) is attached to the nozzle (4) at the tip of the adapter (3). The condensing lens (7)
is He-He focused by the above-mentioned condensing lens (2)
The He-He laser beam (Ll) is mounted at a position closer to the workpiece (5) than the focusing point of the laser beam (2), and is focused by the focusing lens (7). A small diameter condensing lens (7) having a focal length formed on the workpiece (5) is selected and attached as shown in FIG. 2(b).

Therefore, in order to process the workpiece (5), a test piece for trial processing is prepared in advance, and spot processing is performed on the test piece using a low-output CO2 laser beam (L+).
If the e-Ne laser beam (Ll) is irradiated onto the test piece and its focal point is deviated from the above spot, the He-Ne laser beam (Ll) can be adjusted by operating the adjustment screw (8). Match visible light points to spots. Thereafter, the machined part of the workpiece (5) is tracked by He-He L/-the light (Ll) to teach and memorize the machined position. By doing so, the workpiece (5) can be processed accurately and precisely. Further, the workpiece (5) will not be damaged by trial machining.

[Effects of the Invention] As described above, according to the present invention, the part to be machined on a workpiece can be taught and memorized to a laser processing machine accurately and with high precision using a He-Ne laser beam, and the location to be machined on a workpiece can be taught and memorized by a CO2 laser beam. Workpieces can be processed accurately and with high precision.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are sectional views showing one embodiment of the processing head device according to the present invention, FIG. 1(a) is a sectional view showing the entire processing head device, and FIG. FIG. 2 is a diagram showing a cross section of a nozzle portion to which a small diameter condensing lens is attached, and is a diagram corresponding to FIG. 1(a) showing a conventional device. (2) is the condenser lens, and (4) is the nozzle (the tip of the processing head). (5) is the workpiece, (6) is the adjustment screw (adjustment mechanism). (7) is a small diameter condenser lens, (Ll) is a CO2 laser beam, and (Ll) is a He-Ne laser beam. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] When the CO_2 laser beam is focused by the condenser lens and then irradiated onto the workpiece to process the workpiece, the He-Ne laser beam superimposed on the CO_2 laser beam is focused by the condenser lens and then irradiated onto the workpiece. In the processing head device of the CO_2 laser processing machine, which is configured to track the processing position of the workpiece and to teach and store the processing position in advance in the laser processing machine, the processing head is located at the tip of the processing head and the collection of the He-Ne laser light is performed. A small-diameter condensing lens is installed on the workpiece side relative to the condensing point of the optical lens, and the He-Ne laser beam diffused by the lens is refocused to form a condensing point on the workpiece. Light spot above CO_2
A processing head device for a CO_2 laser processing machine, characterized in that it is provided with an adjustment mechanism to match the focal point of a laser beam.