JPH01224196A - Smoke removing device for laser beam machine - Google Patents

Abstract

PURPOSE:To prevent the tramp and splash of the body to be machined and to prevent the pollution by a smoke and soot by providing the cover forming a machining room and exhausting by a fan device from the exhaust port provided at the upper part of the work room. CONSTITUTION:When a fan 8 is operated, the air inside a machining room 2 is exhausted from the exhaust port 11 of the upper part of the machining room, so the air forms an upward airflow D mainly at the vicinity of the body 100 to be machined. This upward airflow D does not tramp or splash the body to be machined. Even if a smoke and soot are generated from the body 100 to be machined at machining time this smoke and soot is taken off to the upper part by the airflow D, so the body 100 to be machined is prevented from being spoiled by the smoke and soot.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a smoke removal method for removing smoke generated in the processing section of a laser processing device that processes objects such as fabrics and leather by scanning a laser beam. This invention relates to a removal device.

[Conventional technology]

The processing method of the laser processing device is to irradiate a workpiece supported on a cutting conveyor with a laser beam emitted from a swinging mirror that can swing two-dimensionally while scanning the workpiece. Process the workpiece. In order to remove smoke generated from the machining section of the workpiece that is irradiated with the laser beam, a so-called swinging mirror type is equipped with a cover that covers the machining section to form a machining chamber. A blower device may be provided in the processing chamber to generate a ventilation flow near the support stand within the processing chamber.

Fig. 3 is a diagram showing an example of a conventional smoke removal device, in which (1) is a cover forming a processing chamber (2), (3) is a cover forming a processing chamber (2);
There is an air blowing device near the conveyor (102) in this processing chamber (1) for generating a ventilation flow A along the surface of the workpiece (100). This blower device takes in air B from outside the processing chamber (2) and discharges this air to produce a ventilation flow. A downstream side blower (5) for sucking in and discharging the air to the outside of the processing chamber (2) is connected to this downstream side blower by a duct (6), and the exhaust air from the downstream side blower (5) is connected to the downstream side blower (5). (7) and a blower (8) for discharging the air to the outside.

[Problem to be solved by the invention]

However, in the conventional apparatus described above, an air flow is generated along the surface of the workpiece on the support table, which may cause the workpiece to flap or move. , As a result, machining accuracy is improved &-
There was one.

Furthermore, when the smoke and soot generated during machining flowed onto the surface of the workpiece due to the above-mentioned air flow, the surface of the workpiece could become stained with the smoke and soot.

This invention was made in order to solve this problem, and its purpose is to obtain a smoke removal device for a laser processing device that generates an air flow that prevents the workpiece from flapping or swaying. do.

Another object of the present invention is to provide a smoke removal device for a laser processing device that generates an air flow that prevents the smoke and soot from contaminating the workpiece even if smoke and soot are generated from the processing section.

Another object of the present invention is to obtain a smoke removal device for a laser processing device that generates an air flow that prevents smoke and soot generated from a processing section from contaminating an optical system.

[Means to solve the problem]

The smoke removal device for laser processing equipment described in this explanation uses a laser beam emitted from a swingable mirror to irradiate a workpiece supported on a support table while scanning it two-dimensionally. By this, a cover 'K' is installed in the laser processing apparatus for processing the workpiece, and covers the processing section to form a processing chamber.
At the same time, an exhaust port is installed at the top of this processing chamber.
A blower rIIL is provided for exhausting air from this exhaust port.

Furthermore, an opening for the laser beam to enter the processing chamber is recessed in the upper part of the processing chamber, and a blower device is installed on the F side of this opening to generate a nearly horizontal airflow. .

[Effect]

In the second aspect of the invention, the air blower exhausts the air from the exhaust port at the top of the processing chamber, so the air flow is relatively quiet near the workpiece, so that the workpiece may fluctuate. It is possible to prevent spills and spills from occurring.

Further, in the vicinity of the workpiece, the air flow does not flow horizontally or downward, but mainly upwardly, so that smoke and soot generated during processing can be prevented from contaminating the workpiece.

In addition, the horizontal air flow of the opening at the upper part of the processing chamber can prevent contamination of the optical components by the soot and soot generated during processing.

[Refreshing legend of invention]

1. First of all, the above-mentioned swinging mirror one-type laser machining H1ill in which this explanation is valid will be explained with reference to FIGS. 4 to 6.

As shown in Fig. 4 and Fig. 'M5, the fabric (100) to be processed is supported on the upper part of the conveyor (102) which is a support base for moving the fabric (100) to the right. On the left side, a spreading device (104) for the fabric (100) is arranged. This spreading device (104) has a fabric (100
) is set and the roll (106) wound with
The fabric (10) wound around this raw fabric roll (106)
0) is conveyed by a conveyor (102) by a spreading device (104).
) 1, conveyor (1
A scrap processing device (108) is arranged on the right side of 02), and the remaining scrap after the processing is completed is accommodated.

A substantially U-shaped frame (110) is arranged at an appropriate position near the center of the conveyor (102), and furthermore, a laser head (11
2) is fixed. This laser head (112) includes, for example, a gimbal-shaped first mirror drive section (
114), a second mirror drive section (116), and a condensing means (118), respectively. Laser head (112)
An example of the optical system is shown in FIG. As shown in this figure, the laser beam is transmitted through a convex mirror (1
20), after the beam diameter is expanded through a beam expanding means consisting of a concave mirror (122), the beam is incident on a lens 7 (124) which is a condensing means (118), and then further expanded into a mirror (12).
6) and is made incident on the fabric (100).

The first mirror drive unit (114) drives the mirror (126) to swing nine times as indicated by the arrow FA in FIG. 5 or the arrow FB in FIG. 6 about the axis PX. coincides with the optical axis (the central axis of the optical beam of the laser beam) of the lens (124) of the condensing means (118).

The second mirror driving section (116) swings the mirror (126) about the axis PY as shown by arrow C in FIG. 5 or arrow b'D in FIG. 6.

In other words, the laser beam RB (see P@ in Fig. 4) is transmitted through a convex mirror (
120), the concave mirror (122) and the lens (124) focus on the fabric (100), and the first mirror driver @5 (114) coordinates X assumed on the fabric (100). The second mirror driving unit (116) scans the fabric (100) in the assumed coordinate Y direction.

Note that the beam expanding means consisting of a convex mirror (120) and a concave mirror (122) is used to narrow down the spot diameter d of the laser beam RB on the fabric (100).

That is, the spot diameter d is expressed as - υ where d=the focal length jlIIIF1 of the lens (124) and the beam diameter D1 constant k of the laser light incident on the lens (124). Therefore, even if the focal length F' is made large, if the spot diameter dt is kept constant, the beam diameter must also be increased in proportion to F.

Next, the conveyor (102) S or the spreading device (104
) A laser oscillator (128) is disposed in the vicinity of the frame (110), and an optical means (130) consisting of a reflex mirror or the like is mounted on one shoulder (IIOA) of the frame (110).
The arrangement is fixed δ. A transmission body (132) consisting of a beam duct or the like is provided between the laser oscillator (128) and the optical means (130).
A similar transmitting body (184) is provided between the condensing means (118) and
is provided. That is, the transmission body (132),
(184) and optical means ([0)K to convert the laser beam output from the laser oscillator (128) into the laser head (1
12) The transmission means leading to

As shown in FIG. 4, a processing control device (200) is arranged on the side of the conveyor (102) and near the scrap processing device (108). This processing control device (200) is composed of a first-stage processing device that performs production management, pattern making, grading, or marking processing, and a second-stage processing device that performs other direct processing. The front processing equipment has
Data input means such as paper tape is disconnected.

According to the command from this processing control device (200), the above-mentioned laser oscillator (128), laser head (112)
.

It controls each device such as the spreading device (104), the conveyor (102), and the scrap processing device (108).

As a result, the fabric (100) is cut by irradiating the fabric (100) with a laser beam emitted from the swingable mirror (126) while drawing a certain pattern on the fabric (100) while scanning it two-dimensionally. .

In other words, the four-way spreading device (104) and the conveyor drive device are operated, whereby the fabric (100) is fed from the raw fabric roll (106) onto the conveyor (102), and this fabric ( When Zoo) comes to the designated place,
Conveyor (102)H stops. On the other hand, the laser oscillator (128) starts oscillating operation according to the operation command, and the laser light reaches the laser head (112) via the transmissions K (182) and (184) Th. The laser light passes through the aforementioned beam expanding means and lens (124), and
It is focused and reflected onto the fabric (100) by a mirror (126). At this time, the first and second mirror drive! 1121 parts (114) and (116) cause the mirror (126) to swing around the axes PX and PY (7),
The laser beam RB scans the stopped fabric (Zoo) at a predetermined location according to a predetermined pattern and markings (see FIG. 4). Further, the lens (124)
Corresponding to the scanning of B, the lens (
124) and the fabric (100) is set so that the optical distance is constant. By this step 6, the fabric (100) is cut with a focused machine, that is, with the spot diameter of the laser beam RB being the smallest.

Through the above operations, the fabric (100) is cut, and then the fabric (100) is cut. ,competition? (102) in the direction of the scrubbing device (108). At this time, the scrap processing device (10
8) is driven. Cut fabric (100A), (1
00B) are collected from the conveyor (102) by the operator, and the scraps are collected by the scrap processing equipment (102) by the operator.
08).

Further, the workpiece may be metal, plastic, etc. in addition to the 9 rolls of cloth. Furthermore, if the workpiece has a relatively small area, it may be placed directly on the conveyor (102).

Next, an embodiment of this defense will be described based on FIG. 1, in which a smoke removal device is attached to the above-mentioned laser processing device.

In the figure, (102) is a support stand, and this figure shows the case of a conveyor.

On this conveyor (102), there is a fabric (1
00) is supported. (126) is fabric (100)
On the other hand, it is a swingable mirror that emits laser light in order to process the fabric (100) by scanning and irradiating the laser light two-dimensionally. (1) is a cover that is provided in the laser processing apparatus and forms a processing chamber (2) by covering the processing portion of the fabric (100) that is irradiated with laser light, and (3) is a blower device. This air blower is connected to an air blower 1i# (81) through a duct (6) from an exhaust port (1υ) opened in the upper part of the processing chamber (2), and is further connected to the air blower (8) to exhaust air to the outside. A duct σ) for discharging is connected.

The operation of the smoke removal device having the above configuration will be explained.

2 in Figure 1 and operate the blower (8), the processing chamber (
2) Since the air inside the processing chamber is exhausted from the exhaust port (11) at the top of the processing chamber, the air mainly generates an upward airflow near the workpiece (100).

Unlike the ventilation flow A along the workpiece shown in FIG. 3, this upper ventilation flow does not cause the workpiece to flap or scatter. Of course, even if the ventilation flow is excessive, if the airflow is too large, it may cause the workpiece to flap or be scattered, but the airflow should be such that the is controlled by.

Further, even if smoke and soot are generated from the workpiece during processing, the soot and soot are first carried away upward by the ventilation flow, thereby preventing the workpiece from becoming contaminated with smoke and soot.

Figure 2 shows a blower device (1 fan) that generates a horizontal air flow E in the upper part of the processing chamber (2).The laser beam is emitted from the mirror (126) onto the workpiece. (10
0), a large opening is required at the top of the processing chamber (2), and if smoke or soot flows upward from this opening, there is a risk of contaminating optical components such as mirrors and lenses. As shown in Figure 2, if a horizontal airflow E is generated under this opening, the smoke and soot rising from the workpiece will be removed by this airflow E. (11) to duct) (6), air blower m(8).

Since it is discharged to the outside through the duct (7), contamination of optical components is prevented.

〔Effect of the invention〕

As described above, this invention is provided with a cover that forms a processing chamber, and exhaust is exhausted by a blower device from an exhaust port provided at the upper part of the processing chamber, so that the workpiece does not flap or scatter due to the wind. Never.

Further, smoke and soot generated from the processing section do not contaminate the workpiece.

In addition, a blower device that generates a horizontal air flow in the upper part of the processing chamber has the effect that smoke and soot generated from the processing section do not contaminate optical components such as lenses and mirrors.

[Brief explanation of the drawing]

Fig. yg1 is a front view of a smoke removal device for a laser processing device showing one embodiment of the present invention, Fig. 2 is a front view of a device showing another embodiment, and Fig. 3 is a front view of a smoke removal device for a conventional laser processing device. FIG. 4 is a front view of the removal device, FIG. 4 is a perspective view showing the configuration of a laser processing device to which this explanation is applied, and FIG. 5 is! FIG. 4 is an explanatory diagram showing a conventional example of the laser head of the apparatus shown in FIG. 4; In the figure, (1) is the cover, (2) is the processing chamber, and (3)
is the blower, (11) is the exhaust port, α is the blower, (1
00) is '4&m workpiece (fabric), (102) is the support stand (
conveyor), (126) with a mirror. Note that the same reference numerals in each figure indicate the same or corresponding parts. Substitution Masuo Oiwa-Cy α): Figure 5 Figure 6 Procedural Amendment (Method) 1, 1' Matter No. Fz Showa 63"42' No. 2, Title of Invention, Smoke for Laser Processing Equipment Removal device 3 Person making the amendment Representative Moriya Shiki 4, Agent I Date of amendment order May 31, 1985 (shipped) I Ken/Elephant Subject of amendment (1) Brief explanation of the drawings in the specification Column 7. Contents of amendment (1) In page 14, lines 12 to 13 of the specification, “4th
It is an explanatory diagram of the device shown in figure number ζ. ” has been replaced with “A configuration diagram schematically showing the device shown in Figure 4, Figure 6.
This figure is an explanatory diagram showing the optical system of the laser head of the apparatus shown in FIG. 4. ” he corrected. that's all

Claims (2)

[Claims] (1) A laser processing device that processes a workpiece supported on a support table by scanning and irradiating the workpiece two-dimensionally with laser light emitted from a swingable mirror. Smoke for laser processing equipment, characterized in that a cover is provided to cover the processing part to form a processing chamber, an exhaust port is provided in the upper part of the processing chamber, and an air blower is provided for exhausting air from the exhaust port. removal device. (2) The laser according to claim (1), further comprising a blower device that generates a substantially horizontal air flow below the opening through which the laser beam enters the processing chamber at the upper part of the processing chamber. Smoke removal device for processing equipment.