JPS60177987A - Laser working device - Google Patents

Abstract

PURPOSE:To perform sharp working at a high speed by oscillating laser light around the prescribed axis while adjusting the focus of the laser light at a material to be worked thereby scanning the laser light. CONSTITUTION:Laser light arrives at a laser head 112 via transmission bodies 132, 134. The laser light passes through a beam expanding means and lens and is reflected by mirrors so as to focus onto a fabric. Respective operation commands are emitted in this stage from a cutting control part 402 to an operation board 406 for driving the head and a servocontroller 408, by which a focus adjusting device 412 is driven. More specifically, the lens is moved in the optical a xis direction in accordance with the scanning of the 1st and 2nd mirror driving devices for the laser light, by which the optical distance between the lens and the fabric is controlled to a constant distance. The fabric is thus cut in the focused state.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a laser processing device, and particularly to a laser processing device for processing objects such as cloth, leather, etc. by scanning a laser beam. It is related to.

[Prior art]

FIG. 1 shows an example of a conventional laser processing apparatus W. As shown in FIG. In this figure, a scrap processing device 16 for accommodating and processing a cutting conveyor 10 is arranged 11. The fabric 18 to be processed is transported from the fabric spreading device 14 to the cutting conveyor 10, as shown by mark F1 in the figure.A drive mechanism 22 for scanning the laser head 20 is disposed near the approximate center of the cutting conveyor 10. has been done.

This drive mechanism 22 includes a first drive body 24 and a second drive body 26. A pair of first drive bodies 24 are provided on both sides of the cutting conveyor 10, and a second drive body 26 is installed movably in the direction of arrow F6. That is, the second driving body 26
is driven in the direction of arrow F6 by the driver 24 of. The direction of this arrow F6 corresponds to the coordinate axis X assumed on the surface of the fabric 18.

A carriage 28 is attached to the second driver 26, and the carriage 28 is driven by the second driver 26 in the direction of arrow F4 in the figure.

The direction of the arrow F4 is assumed to be on the surface of the fabric 18, and furthermore, in the vicinity of the cutting conveyor 10, the direction of laser activation, that is, the direction of movement of the second driving body 26 as indicated by the arrow F6 coincides.

Further, the direction of the optical path L2 corresponds to the moving direction of the laser head 20, that is, the moving direction of the carriage 28 as indicated by the arrow F4. Therefore, no matter how the laser head 20 moves, the laser light output from the laser oscillator 60 can reach the laser head 20 well.

Next, the operation of the conventional example will be described. The fabric 18 is transported along with the operation of the cutting conveyor 10 and passes through the laser head 200. The laser head 20 is scanned and moved by the drive mechanism 22, and as a result, the laser beam becomes constant on the fabric 18. Further, the noise or vibration accompanying the operation of the drive mechanism 22 must also be considerably large.

Furthermore, since the movement range of the loser head 20 coincides with the cutting pattern, there is also the disadvantage that it is difficult to perform cutting at high speed.

[Summary of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a laser processing device that can perform sharp processing at high speed and reduce noise or vibration. The above purpose is achieved by a laser processing device that swings a mirror, which is an optical means for irradiating a laser beam onto a workpiece, around first and second axes, and controls the focus of the laser beam on the workpiece. This is what we are trying to achieve.

[Embodiments of the invention]

The laser processing system according to the present invention is shown in Figure 2 below. The fabric roll 106 on which the fabric 100 is wound is set in the fabric spreading device 104, and the fabric 100 wound around the fabric roll 106 is sent onto the slat conveyor 102 by the fabric spreading device 104. It is now being released. On the right side of the slat conveyor 102, a scrap processing unit 102 is arranged to store the remaining scraps after processing is completed.

The slat conveyor 102 includes a first mirror drive section 114, a second mirror drive section 116, and a condensing means 118 at appropriate positions near the center of the slat conveyor 102, respectively. An example of the optical system of the laser head 112 is shown in FIG.
The mirror 126 is driven to swing around the axis PX as shown by the arrow FA in FIG. 6 or the arrow FB in FIG.
This axis PX coincides with the optical axis of the lens 124 of the condensing means 118.

The second mirror driving unit 116 moves the mirror 126 by ":"
It swings around 1111 PY as shown by the arrow FC in FIG. 6 or the arrow FD in FIG. 4.

,゛-Electric fgaa, L=-tl'tRB (,,,,,
2- Ya, yu,.

The surface mirror 120, the concave mirror 122, and the lens 124 focus on the fabric 100, and
The fabric 100 is scanned in the assumed coordinate X direction by the first mirror drive unit 114, and the second mirror drive unit 11
6, the fabric 100 is scanned in the assumed coordinate Y direction.

Furthermore, the beam expanding means consisting of the convex surface 1120 and the concave surface @122 is for narrowing down the spot diameter d of the laser beam RB on the fabric 100.

In other words, the spot diameter d is the lens (124C1 focal length F, the beam diameter D of the laser beam incident on the lens 124).
It is expressed as d=kL for one constant k. Therefore, even if the focal length F is large, if the spot diameter d is kept constant, the movement required to increase the beam diameter in proportion to F can be reduced. In the vicinity of
A laser oscillator 128 is disposed, and an optical means 160 consisting of a prism, a mirror, etc. is arranged and fixed on one side of the frame 110 (110A). A transmission body 132 made of optical fiber or the like is provided, and a similar transmission body 134 is provided between the optical means 160 and the condensing means 118. That is, the transmission body 152
．． 164 and the laser oscillator 12 by the optical means 160
A transmission means for guiding the laser beam outputted by the laser beam 8 to the laser head 112 is configured.

Next, a portion of the slat conveyor 102 is curved into an arc shape, thereby forming a processed curved portion 102A. This processed curved portion 102A is formed on the mirror 12.
It is configured to form a part of the circumference of a radius R whose center point is the rotation center of the axis PX of No. 6 (see FIG. 6). For this reason, a processing control device 200 is disposed on the side of the first mirror 102 and near the scrap processing device 16, and an example of its configuration is shown in FIG.

In FIG. 5, the processing control device 200 is composed of a first-stage processing device 300 that performs production management, pattern making, grading, or marking processing, and a second-stage processing device t400 that performs other direct processing. ing. A data input means 202 such as a paper tape is connected to the processing device 300 .

The processing device 600 includes a production management section 602, a turn making/grading section (hereinafter simply referred to as "PG section") 604, and a marking section 606. Among these, the production management unit 602ti has a function of instructing processing based on data necessary for production management such as the production quantity and type of the entire processing work. PG section 6
In 04, the creation of raw turns and grading are standard. The marking unit 606 prints a pattern on the fabric 100 based on the input data. In the processing device 400, laser beam scanning is performed based on the data input from the marking section 606, and the fabric 100 is cut.

Next, the ridge processing device dl400vc will be explained.

This processing device 400 is mainly composed of a cutting control section 402, and the cutting control section 402 is connected to an oscillator operation panel 404.
, head drive operation panel 406 and servo controller 40
8, respectively. Further, the cutting control unit 402
It is also connected to the spreading device 104, the scrap processing device 108, and the conveyor drive device 410, respectively. Among these, the oscillator operation panel 404 is connected to the laser oscillator 128 and can be operated manually to control the laser oscillator 12.
8.

It has become. Note that the head drive operation panel 406 is operated not only by commands from the cutting control unit 402 but also by manual operations by an operator.

The conveyor drive device 410 is only for driving the slat conveyor 102. This conveyor drive device 41
0, spreading device 11104 and scrap processing device 108
operates in a certain manner based on commands from the cutting control section 402, and the fabric 100 is fed onto the slat conveyor 102 according to the degree of processing.

Next, the overall operation of the above embodiment will be explained.

First, the cutting control section 402 operates the spreading device #104 and the conveyor drive device 410 based on the data input from the processing device #600, and thereby the light is reflected onto the fabric 100 so as to be in focus.

At this time, the head drive operation panel 40 is
6 and the servo controller 408, and the focus adjustment device 412 is driven. That is, the lens 124 is 1. o It moves in the optical axis direction in response to the scanning of the first and second mirror driving devices of the laser beam RB, and is controlled so that the optical distance between the lens 124 and the fabric 100 is constant.

As a result, the fabric 100 is cut in a focused state, that is, in a state in which the spot diameter of the laser beam RB is minimized.

The fabric 100 is cut by the above operations, and the fabric 100 is sent toward the scrap processing device 108 by the slat conveyor 102. At this time, the cutting control section 4.0
The scrap processing device 108 is driven based on the operation command No. 2. The cut fabric 100 is scanned in the direction of the coordinate axes X and Y by the drive units 114 and 116. Although it is curved, it may be curved in the Y direction. In this case, the movement control of the lens 124 by the focus adjustment device #412 is adjusted to correspond to the X direction.

Further, if the fabric 100'tl is not curved as shown in FIG.

Further, the object to be processed may be fabric, leather, etc., as well as metal, plastic, etc., but it goes without saying that in the above embodiments, it is preferable to use materials that are flexible. If it does not have such properties, the slat conveyor 102 will be constructed flat as shown in FIG. Furthermore, when the workpiece has a relatively small area, it is placed directly on the slat conveyor 102.

゛ - Swings around a predetermined axis while adjusting the focus,
I decided to scan the laser beam by this and 5-c.
i, ayo ayah 7 kaka, niowauu. Both sides 8□5 have the effect of reducing noise or vibration.

[Brief explanation of the drawing]

FIG. 3 is a simplified front view of the apparatus shown in FIG. 2, FIG. 4 is an explanatory diagram showing an example of the configuration of a laser head, and FIG. 5 is an example of a processing control device. FIG. In the figure, 100/I′i fabric, 102 is a slat conveyor, 112 is a laser head 114, 116 is a mirror drive unit, 118 is a focusing means, 120 is a convex mirror, 122 is a concave mirror, 124 is a lens, 126 is a mirror, 128 ke laser oscillator, 102A is the curved part, 200 is the processing control device, PX? PY is an axis, and RB is a laser beam. Note that the same reference numerals in each figure indicate the same or intersecting parts. Applicant: Director of the Agency of Industrial Science and Technology Kawa 1) Procedural amendment by Hirobu (voluntary) In 1972, Director General of the Japan Patent Office, 1. Indication of case: Japanese Patent Application No. 59-32476 2. Title of invention: Laser processing device 3. Make an amendment. Relationship with the Patent Applicant Case 4 The "Detailed Description of the Invention" column and drawings of the specification subject to amendment. 5 Contents of the amendment (1) "Cymbal" on page 7, line 8 of the specification is amended to read "gimbal." (2) "Optical fiber" in the 14th to 15th lines of page 9 of the specification is corrected to "prism, mirror, or optical fiber." (3) Figure 2 of the drawings shall be amended as shown in the attached amended drawings. that's all

Claims (1)

[Scope of Claims] (11) A laser processing device that processes a workpiece by scanning and irradiating a workpiece supported on a support table two-dimensionally with a laser beam; 1 1 (2) The focusing means includes an optical means for condensing and irradiating the workpiece with a laser beam output from a light source, and the optical means is a condensing means for condensing the laser beam. , Claim 1 is a converging means including a beam expanding means for expanding the diameter of the laser beam.
The laser processing device described in Section 1. (3) The support base is a support base including a curved part forming an arc with respect to the center of the first or second axis, and the control means is configured to control the direction of the curved part of the support base. 3. The laser processing apparatus according to claim 1, wherein the laser processing apparatus is a control means for adjusting the focus of the laser beam in directions that intersect with each other.