JPS5897490A - Working method using laser light - Google Patents

Abstract

PURPOSE:To improve the accuracy of cutting sizes and to reduce a working time by performing both scribing and cutting continuously by changing the output of laser light. CONSTITUTION:First a scribing line is drawn on the surface of the work 21. For example, gaseous Ar 19 is selected with a valve stand 17 by the signal from a control device 23, and is ejected from a nozzle 15. The scribing line is beforehand programmed in an NC unit 22, and the on-off of laser light 12 and the high speed movement of an X-Y table are accomplished by the signal from the unit 22. Upon completion of the scribing work, the auxiliary gas is changed over to gaseous O2 18 for cutting from the inert gas for scribing by a solenoid valve in the stand 17 according to the signal from the unit 22. The laser output is also increased to the output at which cutting is possible by increasing the discharge current of a laser oscillator 11 in accordance with the signal from the unit 22.

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention relates to a processing method using laser light.

(b) Prior art Processing using laser light is generally used for welding, cutting, and
It is applied to a wide range of applications such as heat treatment and cutting of non-metallic materials. The members that make up the structure are press cut, gas cut,
It is processed to the required dimensions using laser cutting, etc. Many other members are attached to these members to form a structure. There are mechanical, electrical, and optical methods for positioning a device for attaching one member to another, and these methods are selected and used as appropriate. By the way, the mechanical method is often used because it is the simplest method, and each method has its own characteristic positioning method depending on the number of units/lot to be manufactured, the frequency of repetition, the accuracy required, etc. When manufacturing 17 pieces of equipment, the positioning of its constituent members is particularly important, and the degree of variation in positioning accuracy has a significant influence on the functionality of the product.

Conventionally, the method for determining 1d in can manufacturing, sheet metal work, and welding work is to measure the required dimensions with scale 1 and mark the required dimensions with scriber 2, as shown in Figure 5, in the case of small quantities/lots. The workpiece 3 is directly scribed. However, if the number of pieces/lots are small and the number of repetitions is high, a single stroke or a simple jig 4 as shown in Fig. 2 is used, and the mounting position is directly marked with a stroke or the object 5 to be attached is marked. A method is used in which the object is restrained by a jig 4 and positioned on the workpiece 3.

However, the conventional positioning method described above does not.

(1) It is difficult to manage the sickles used for painting, jigs, etc.

In other words, check the storage method and check for wear or damage. The disadvantage of implementing this thoroughness is that administrative expenses will increase. Although it is simple, it takes time and effort to maintain the box after it is manufactured, and the overall effectiveness is small.

(When marking with a 2λ scale, there is a risk of errors due to misreading or misunderstanding of the scale graduations. When transferring the required dimensions from the scale to the workpiece with a marking needle, there may be variations in the accuracy of the transfer, resulting in errors. Occur.

In addition, when using a picture paper, there is a risk of using the wrong reference plane, using the wrong side, or using the wrong side of the picture paper.

Furthermore, when a jig is used, the manufacturing time of the jig is long and the cost is high. Since scribing is done after cutting, there may be a difference between the reference line and the scribing when cutting.
The accuracy of the parts picking position deteriorates.

Furthermore, if the size of the member is large, the person doing the scribing has to take an awkward position and move in that position, resulting in a decrease in work efficiency.

(C) Object of the invention Invention d: To provide a processing method using a laser beam that eliminates the drawbacks of the conventional method by continuously performing both marking and cutting operations while changing the output rate of the laser beam. 4゜(d)・Value of the Invention The present invention irradiates a laser beam with a reduced output to perform marking, and then increases the output of the laser beam to irradiate and assist. By injecting gas to perform cutting, continuous processing of both operations can be performed (i+7).

(e) Embodiment of the Invention An embodiment of the present invention will be described below with reference to the present invention. Third
In the figure, 11 is a laser oscillator, 12 is a laser beam, and J
3 is a mirror that reflects the laser beam 12, I4 is a Toko lens that focuses the laser beam 12, 15 is a nozzle that outputs the laser beam 12 and auxiliary gas, 16 is a conduit that guides the auxiliary gas, 17 18. is a pulp stand which selects the supply of auxiliary gas to the nozzle 15 as desired; :3 and 19 are cut.

Auxiliary gas cylinder for marking, 20 is X-Y table, 21
is the workpiece, 22 is the NC that drives the X-Y table 20
Armor, 23 is NC device 22, pulp stand 17, V-
This is a control device that controls the oscillator 11.

Next, the operation of the configuration described above will be explained in detail.

The laser beam 12 excavated from the laser beam 11 shown in FIG. It is irradiated to 6. First, the workpiece 210 surface VC
Draw a marking line, but at this time, the auxiliary gas
An inert gas, for example, Ar gas 19, is selected in the pulp stand 17 by a signal from 3, and a solenoid valve (not shown) is opened, and the gas is ejected from the nozzle 5 through the gas conduit 16. In this operation, one laser beam 12 with minute output is irradiated while flowing auxiliary gas. Here, it is preferable that the focus of the laser beam 12 be focused near the surface of the Loe material 21. Therefore, the marking line is programmed in advance into the I'JC device 2, and the signal from the +'JC device 22 turns the laser beam 12 ON-OFF, X-Y i.
- perform a high-speed movement of the pull 20; The length and position of the marking line
1 star can be arbitrarily selected by a signal from the 1% JC device 22.

When the scribing work is completed, the next step is to cut. At this time, the auxiliary gas is changed from the inert gas 19 for scribing to the 0.2 gas 19 for cutting as shown in the diagram in the pulp stand 17 by a signal from the NC device 22. Switched by a solenoid valve. The laser output is also a signal from the NC device 22, and the laser oscillator 1
The output of the laser beam is increased so that the laser output can be cut. Switching between auxiliary gas and laser output can be done in just a few seconds because it is done using electrical signals. After this switching, cutting is performed. The cutting operation is also carried out using a cutter 9 programmed in the vessel device 22 in advance, and the workpiece 21 is cut into a desired shape as shown in the workpiece 21 of FIG. Therefore, laser scribing and cutting can be performed continuously.

(f) Effects of the Invention As described above, according to the present invention, laser scribing and cutting can be performed continuously, and parts can be scribed without using jigs, etc. The aim is to improve the degree of cutting dimensions, reduce worker fatigue, shorten machining time when hard-working parts, and produce commercial quality products through self-selection.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a method of drawing marking lines using a conventional scale, Fig. 2 is an explanatory diagram showing a method of positioning a member using a conventional jig, and Fig. 3 is an explanatory diagram showing a method of positioning a member using a conventional jig. FIG. 2 is a configuration diagram showing an example. 11... Laser oscillator, 12... Laser helmet 21.
...Work material, 22...NC device. (7317) Representative Patent Attorney Kensuke Chika (and 1 other person) (7) Figure 1

Claims (1)

[Claims] A laser beam characterized in that a workpiece is irradiated with a laser beam with a reduced output to perform marking, and then the output of the laser beam is increased and irradiated, and an auxiliary gas is ejected to perform a cutting process. Processing method used.