JP3761684B2 - Automatic beam machining centering method and apparatus for laser beam machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic beam machining centering method and apparatus in a laser beam machine.
[0002]
[Prior art]
Conventionally, in a laser processing machine, for example, a YAG laser welding machine, centering of a processing part by a laser beam is performed by an operator confirming a biasing operation with respect to a workpiece W as shown in a schematic diagram of FIG. As shown in FIG. 4, a tape 4 or the like is affixed to the nozzle 2 and the position of the processing spot (light spot) 5 is observed, as shown in FIG. The operator judged and adjusted the centering position.
[0003]
[Problems to be solved by the invention]
However, the above-described machining centering adjustment work is extremely troublesome for beginners and those unfamiliar with machine operation, and requires skill.
[0004]
The present invention has been made in view of the above-mentioned problems of the prior art, and even a beginner does not need any special skill, by an image recognition device, by an internal or external device of a CNC (computer numerical control) device, It is an object of the present invention to provide a method / apparatus for automatically adjusting the centering by determining how to sputter after the piercing.
[0005]
[Means for Solving the Problems]
Therefore, in the present invention, by providing an automatic beam machining centering method or apparatus for a laser beam machine in either of the following holes (1) and (2), the above-mentioned object is intended to be achieved. is there.
[0006]
(1) The sputter coordinate position at the laser beam processing point on the workpiece of the laser processing machine is detected by the detecting means for detecting the sputter coordinate position, and the image of the detected sputter coordinate position is recognized. to be recognized by the image recognition means for, based on the recognized image data, so as to shift driving the coordinate position of sputtering to Jo Tokoro reference coordinate position, the numerical control unit an instruction signal for a shift drive, the processing automatically sent to the laser beam machining head of the nozzle centering mechanism of the machine, automatic beam processing centering method of the laser processing machine, characterized in that control the nozzle centering mechanism.
[0007]
(2) Detection means for detecting the sputter coordinate position at the laser beam processing point on the workpiece of the laser processing machine, image recognition means for recognizing the detected image, and the recognized image data And a numerical control means for automatically sending a command signal for shifting the sputter coordinate position to a predetermined reference coordinate position to the nozzle centering mechanism of the laser beam processing head of the laser beam machine. An automatic beam machining centering device for a laser beam machine characterized by comprising:
[0008]
[Action]
According to the method / apparatus of the present invention as described above, the image recognition apparatus recognizes / judges the sputter pattern by the CNC method and automatically adjusts the beam processing centering. It can be carried out.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings based on an example.
[0010]
【Example】
(Constitution)
FIG. 1 shows a schematic block diagram of an embodiment of a processing centering method for a YAG laser welder according to the present invention. Reference numeral 1 denotes a laser beam processing head, 2 denotes a laser beam nozzle, and 6 denotes a beam condensing lens in the head. W is a sheet metal workpiece, 5 is a laser beam machining spot, and 3 is the sputter.
[0011]
Also, 7 is a CNC device, 8 is an image recognition device, 9 is a CCD camera, and 10 is to shift the lens position of the laser beam condensing lens 6 inside the processing head 1 in the four arrow directions in the X and Y directions, respectively. A stepping motor for driving and shifting the processing spot 5 position to a predetermined correct position is shown.
[0012]
The CC camera 9 constantly monitors the spatter 3 of the processing spot 5 on the workpiece W and sends the image 11 to the image recognition device 8. The device 8 sends the recognition data 12 to the CNC device 7. Accordingly, the apparatus 7 is configured to send an X-Y direction coordinate position correction command signal of the condenser lens 6 to the stepping motor 10.
[0013]
(Operation / Action)
The above operation / action will be described with reference to FIG.
[0014]
The CCD camera 9 always monitors the XY coordinate positions of the machining spot 5 and the sputter 3 on the workpiece W shown in FIG. 1 and sends the XY coordinate position image 11 to the image recognition device 8. The apparatus 8 recognizes this image signal and notifies the CNC apparatus 7 of the image data 12 of the center of gravity position of the sputter 3, for example, X = 100 dots, Y = 200 dots.
[0015]
Upon receiving this image data 12, the CNC device 7 issues a machining spot 5 (machining core position) correction command signal 13, for example, X = 100 pulses, Y = 200 pulses to the stepping motor 10, and The XY coordinate position is automatically adjusted by operating the shift correction drive to a predetermined reference position.
[0016]
(Other examples)
In the above-described embodiments, the function of automatically correcting and adjusting the processing point coordinate position has been described. However, the present invention is not necessarily limited to the “fully automatic mode”, and the operator can be visually informed as necessary. Needless to say, the “automatic mode” or the like may be used in which the operator makes necessary or correct instructions and makes necessary corrections.
[0017]
In addition, when using these functions, it is particularly effective when the spatter after piercing is different from the material, such as “bonded steel plate” (product name: Nitta Steel Co., Ltd.). is there.
[0018]
【The invention's effect】
As described above, according to the present invention, accurate machining centering adjustment of a laser beam machine can be automatically performed without requiring operator's skill or the like.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of a machining centering method for a YAG laser welder according to an embodiment. FIG. 2 is a diagram for explaining the operation / action of the embodiment. FIG.
FIG. 4 shows an example of a conventional machining center adjustment method (part 2).
[Explanation of symbols]
1 Processing Head 2 Laser Beam Nozzle 3 Sputter 4 Tape 5 Processing Spot (Light Spot)
6 Condensing lens 7 CNC device 8 Image recognition device 9 CCD camera 10 Stepping motor 11 Image 12 Image data 13 Command signal W Workpiece

Claims (2)

The sputter coordinate position at the laser beam machining point on the workpiece of the laser processing machine is detected by the detecting means for detecting the sputter coordinate position, and the image of the detected sputter coordinate position is used for recognizing the image. recognized by the image recognition unit, on the basis of the recognized image data, so as to shift driving the coordinate position of sputtering to Jo Tokoro reference coordinate position, the numerical control unit an instruction signal for a shift drive, a laser of the machine automatically delivered to the nozzle centering mechanism of the beam machining head, automatic beam processing centering method of the laser processing machine, characterized in that control the nozzle centering mechanism. Based on detection means for detecting a coordinate position of sputtering at a laser beam processing point on a workpiece of a laser processing machine, image recognition means for recognizing the detected image, and the recognized image data, A numerical control means for automatically sending a command signal for shifting the sputter coordinate position to a predetermined reference coordinate position is provided in a nozzle centering mechanism of a laser processing beam processing head of a laser processing machine. An automatic beam machining centering device for a laser beam machine characterized by that.

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