JPH0681676B2 - Laser processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a laser processing apparatus, and in particular, an apparatus for cutting a cut object such as cloth or paper having a pattern pattern at high speed in correspondence with the pattern. Regarding

[Prior Art] FIG. 2 is a block diagram showing a conventional laser processing apparatus. In the figure, (1) is a laser oscillator that oscillates a laser beam L, (2) is a long-focus processing lens that focuses the laser beam L oscillated from the laser oscillator (1), and (3) is a processing lens (2 ) Processing lens (2) for focusing
A lens driving device for driving the laser beam L in the front-back direction of the optical path of the laser beam L, (4) an oscillating mirror provided on the optical path of the processing lens (2), and (5) an oscillating mirror (4). A mirror driving device for swinging the cloth, (6) a conveyor device for transferring the cloth (7), (8) a spreading machine for supplying the cloth onto the conveyor device (6), and the cloth (7) is wound around the cloth. There is.
(9) is a protective cover arranged on the conveyor device (6), and (10) is a TV camera which is an image pickup device for recognizing the pattern of the cloth (7) moved by the conveyor device (6). It is provided above the conveyor device (6) and adjacent to the protective cover (9). (11) is a mirror irradiation angle correction signal by calculating the deviation amount of the pattern by comparing the deviation between the image signal of the imaged pattern of the cloth (7) captured by the television camera (10) and the previously input reference pattern signal. Is a pattern matching recognition device for outputting.

The conventional laser processing apparatus is configured as described above, the laser beam L oscillated by the laser oscillator (1) is focused by the processing lens (2), and the focused laser beam L is the oscillating mirror (4). Deflator after being reflected by (8)
The cloth (7) on the conveyor device (6) is further disentangled and irradiated, and laser cutting is performed at the cutting position in the protective cover (9). When performing pattern matching cutting, first, the pattern pattern of the cloth (7) which is stationary on the conveyor device (6) is imaged by the television camera (10) located upstream from the cutting position. After the image is picked up by the television camera (10), the cloth (7) is again fed to the cutting position by the predetermined amount by the conveyor device (6).

On the other hand, in the pattern matching recognition device (11), the image signal of the pattern of the cloth (7) of the television camera (10) is compared with the reference pattern signal input in advance, and the pattern pattern deviation amount (ΔX, ΔY ) Is calculated, and a mirror irradiation angle correction signal Vs of the swing mirror (4) corresponding to the amount of deviation is output to the mirror driving device (5) to correct the irradiation angle of the swing mirror (4). Then, the laser beam L reflected by the oscillating mirror (4) is applied to the cloth (7) at the cutting position on the conveyor device (6) to perform laser cutting.

[Problems to be Solved by the Invention] In the conventional laser processing device as described above, the television camera (10) for capturing the pattern of the cloth (7) on the conveyor device (6) is reflected by the swing mirror (4). The cloth (7) is provided on the upstream side of the laser cutting position where laser cutting is performed by the generated laser beam L, and after the pattern work of the cloth (7) is recognized by the television camera (10), the cloth (7) is conveyed by the conveyor (6). ) Is sent to the cutting position to perform the laser cutting work. Therefore, the conveyor device is operated during the movement of the cloth (7) from the recognition position where the recognition work is performed by the TV camera (10) to the cutting position where the laser cutting work is performed. (6)
There is a possibility that the cloth (7) will slip between the two, and thus the irradiation position of the swing mirror (4) whose irradiation angle is corrected will be displaced, the pattern alignment position accuracy will be incorrect, and the laser cutting accuracy will be poor. There was a problem.

In addition, when performing pattern recognition work, the TV camera (10)
In order to move the cloth (7) in a direction orthogonal to the moving direction of the cloth (7), a mechanism for moving the television camera (10) relative to the cloth (7) is required, and the mechanism is expensive, so the entire device There was a problem that was expensive.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a laser processing apparatus capable of improving the pattern alignment position accuracy and the laser cutting accuracy.

[Means for Solving the Problem] A laser processing apparatus according to the present invention includes a swingable swing mirror that reflects a laser beam focused by a processing lens and irradiates the object to be cut to perform laser cutting. A mirror driving device for oscillating the oscillating mirror, an inclined image reflection mirror that can freely move in and out of an optical path system of a laser beam between the processing lens and the oscillating mirror, and the image reflection mirror has an optical path system of the laser beam. An image pickup device for picking up an object to be cut at a cutting position through a swing mirror and an image reflection mirror when located at, and calculating the amount of deviation of the handle of the object to be cut from the image signal of the object to be cut, A pattern matching recognition device that outputs a mirror irradiation angle correction signal corresponding to the amount of deviation to the mirror drive device is provided.

[Operation] In the present invention, the image reflection which is freely tilted in and out of the laser beam optical path system between the processing lens for converging the laser beam and the swingable movable mirror for irradiating the laser beam to perform the laser cutting work. A mirror is provided, and when the image reflection mirror is positioned in the optical path system of the laser beam, the image pickup device picks up an object to be cut at the cutting position through the swing mirror and the image reflection mirror. The recognition position for recognizing the pattern pattern of the object to be cut by the laser and the cutting position for performing the laser cutting operation by irradiating the laser beam from the oscillating mirror match, and the object to be cut is recognized and the laser cutting operation is performed. Sometimes it does not move and it is in the same position, so the pattern alignment accuracy does not go wrong.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, the same configurations as those of the conventional example are denoted by the same reference numerals, and the description of the duplicate configurations is omitted. Reference numeral (12) is an inclined image reflection mirror which is arranged so as to freely move in and out of the optical path system of the laser beam L between the processing lens (2) and the oscillating mirror (4). When irradiating the oscillating mirror (4) from the laser beam L, the laser beam L moves and is positioned outside the optical path system of the laser beam L between the processing lens (2) and the oscillating mirror (4). Reference numeral (13) is a CRT which visualizes the cut object imaged by the television camera (10). The TV camera (10) is fixed and does not move.

In the laser processing apparatus configured as described above, first, the image reflection mirror (12) is moved to be positioned in the optical path system of the laser beam L between the processing lens (2) and the swing mirror (4). The pattern pattern of the cloth (7), which is stationary on the conveyor device (6) and is in the cutting position, is captured by the television camera (10) via the swing mirror (4) and the image reflection mirror (12). Next, in the pattern recognition device (11), the TV camera (1
The image signal of the pattern of the cloth (7) of 0) is compared with the reference pattern signal input in advance, and the deviation amount of the pattern (ΔX, Δ
Y) is calculated, and the swing mirror (4) corresponding to the deviation amount
The irradiation angle correction signal Vs is output to the mirror driving device (5) to correct the irradiation angle of the oscillating mirror (4). After that, the image reflection mirror (12) is moved outside the optical path system of the laser beam between the processing lens (2) and the swing mirror (4). Thus, the work of recognizing the pattern of the cloth (7) by the television camera (10) is completed.

When the work of recognizing the pattern is completed, the laser oscillator (1)
The laser beam L is further oscillated, the laser beam L is condensed by the processing lens (2), and the condensed laser beam L
Is reflected by the oscillating mirror (4) to irradiate the pattern pattern of the cloth (7) at the cutting position to perform laser cutting work. In this way, a laser is provided by irradiating the laser beam L by the rocking mirror (4) and the recognition position where the pattern work of the cloth (7) is recognized by the television camera (10) using the image reflection mirror (12). The cutting position where the cutting work is performed coincides with each other, and the cloth (7) does not move during the recognition work and the laser cutting work, and therefore the cloth (7) is in the same position.

Further, since the image reflecting mirror (12) moves when the pattern is recognized, the image reflecting mirror (12) is lighter than the conventional case where the television camera (10) is moved, and thus the image reflecting mirror (12) is moved.
The moving mechanism is inexpensive.

In addition, when the reference pattern is not input to the pattern matching recognition device (11) and the pattern matching cutting is performed manually, that is, visually, the swing mirror (4) is manually operated while watching the screen of the CRT (13). It is also possible to perform the laser cutting operation while performing the operation to correct the irradiation angle of the swinging mirror (4) so as to match the desired cutting position.

In the above embodiment, the pattern of the cloth (7) at the cutting position is captured by the television camera (10) via the image reflection mirror (12) and the swing mirror (4). The camera (10) is installed between the processing lens (2) and the swinging mirror (4), and the cloth (7) is in the cutting position directly.
The pattern pattern may be captured.

[Effects of the Invention] As described above, the present invention enters and leaves the laser beam optical path system between the processing lens that condenses the laser beam and the swingable swinging mirror that irradiates the laser beam to perform the laser cutting work. An image reflecting mirror that is freely tilted is provided, and when the image reflecting mirror is positioned in the optical path system of the laser beam, the image pickup device picks up an object to be cut at the cutting position through the swing mirror and the image reflecting mirror. The recognition device for recognizing the pattern of the object to be cut by the image pickup device and the cutting position for performing the laser cutting work by irradiating the laser beam by the oscillating mirror are made to coincide with each other during the recognition work and the laser cutting. Since the cut object is kept at the same position without moving, the pattern alignment position accuracy is not disturbed, the laser cutting accuracy is improved, and the imaging device does not move, so the device is safe. It has the effect that it can be manufactured at a reasonable price.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional laser processing apparatus. In the figure, (1) is a laser oscillator, (2) is a processed lens, (4) is an oscillating mirror, (5) is a mirror drive device,
(7) is a cloth (cut object), (10) is a television camera (imager), (11) is a pattern matching recognition device, (12) is an image reflection mirror, and L is a laser beam. In each drawing, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A processing lens which collects a laser beam from a laser oscillator, and a laser beam which is collected by the processing lens is reflected to move in a horizontal direction and irradiates an object to be cut at a cutting position. An oscillating mirror that performs laser cutting, a mirror driving device that oscillates the oscillating mirror, and an inclination that is freely movable in and out of the optical path system of the laser beam between the processing lens and the oscillating mirror. An image reflection mirror, an image pickup device for picking up an image of the cut object at the cutting position when the image reflection mirror is located in the optical path system of the laser beam through the swing mirror and the image reflection mirror, and a cut object image of the image pickup device. A pattern matching recognizing device that compares a deviation between a signal and a reference pattern signal input in advance to calculate a deviation amount of a pattern of an object to be cut and outputs a mirror irradiation angle correction signal corresponding to the deviation amount to a mirror driving device. Having The laser processing apparatus according to claim.