JPH05337676A - Dust collection processor of heat cutting machine - Google Patents

Abstract

PURPOSE:To provide the dust collection processor for a laser beam machine for preventing fitting of spatter on the inside of a dust collecting pipe and growing up at the time of laser beam machining, and also, for collecting dust and hume, etc. CONSTITUTION:The dust collection processor 41 for cleaning separately a solid body (spatter) and gas (hume) in a spiral jet is constituted by providing a dust collecting pipe 35 provided with plural nozzles 37 for ejecting a spiral liquid jet in the lower part of a work table 3 right under a laser beam machining head 7, a filter 47 for filtering and separating spatter contained in a liquid, and a partition wall part 63 forming a spray layer in the lower part of this dust collecting pipe 35, and an air filter 67 in the vicinity of this partition wall part 63.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment for treating a work placed on a work table with spatter and stimulating gas generated when cutting a work with a heat cutting beam emitted from a processing head. The present invention relates to a dust collecting device for a cutting machine.

[0002]

2. Description of the Related Art Conventionally, when cutting a work with a laser cutting machine as a thermal cutting machine, a lot of fumes and spatters are generated, which causes a bad working environment in a factory. Was considered an important issue.

Therefore, in a conventional laser processing machine, a hole is formed in a work table directly below the laser processing head, a dust collecting pipe is attached to a lower portion of the hole, and a dust collecting duct or a dust collecting duct is provided below the dust collecting pipe. Provide a scrap box, etc.
A suction pump is provided in a part of the dust collecting pipe or duct via a filter, and the laser pump is operated to suck fumes and spatters during laser processing.

[0004]

However, in the above-described conventional dust collecting apparatus for laser processing, in the case where the dust collecting pipe is provided with the suction hole, not only spatter adheres to the vicinity of the suction hole but also grows. , Block the intake hole,
Finally, there was a problem of clogging the dust collection pipe.

Further, in the case where the duct is provided with an air intake hole, there is a problem that the dust collection efficiency is poor and the dust is not sufficiently sucked, and dust rises on the work table.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent spatter from adhering to and growing in the dust collecting pipe, and to prevent dust and dust generated during the heat cutting process. An object of the present invention is to provide a dust collection processing device for a thermal cutting machine that completely recovers fumes and the like.

[0007]

In order to achieve the above object, a dust collector for a thermal cutting machine of the present invention irradiates a workpiece placed on a work table with a thermal cutting beam from a machining head. A plurality of swirling liquid jets are jetted to a lower part of the work table, which is directly below the processing head, of a heat cutting machine for cutting the work, in order to process spatters generated during the heat cutting. In addition to providing a dust collecting pipe equipped with the nozzle, the dust collecting device for treating the waste liquid is provided.

Further, the dust collecting apparatus has a circulation pump for accommodating the liquid ejected from the nozzle at a lower portion thereof, and a circulation pump for filtering the contained liquid and circulating it again to the nozzle. , A container provided with a plurality of partition walls on the other side to form a spray layer for cleaning the stimulating gas generated during the heat cutting process between the partition walls, and a blower for discharging to the outside air through a filter. It is characterized by having.

[0009]

In the dust collector of the thermal cutting machine having the above structure, the spiral liquid jet is ejected into the dust collecting pipe during the thermal cutting so that the spatter generated during the thermal cutting becomes the spiral liquid jet. It is caught up and flows down without growing because it does not adhere to the inner surface of the dust collection pipe. The waste liquid containing the spatter and the like that has flowed down flows out from the lower end of the dust collecting pipe to the outside through the liquid feeding passage.

A container for receiving a liquid is provided under the dust collecting pipe, a filter is provided on one side of the container to filter waste liquid, and the filtered liquid is circulated to the nozzle by a circulation pump. By sending the spatter, the spatter and the like can be efficiently collected. In addition, a partition with a spray layer was installed on the other side of the container, and a duct with a filter was installed on the other side of the partition to allow suction by a blower. The irritating gas is sucked into the dust collecting pipe, cleaned, and released to the outside air, so that the working environment in the factory can be maintained without being damaged.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 3, for example, a laser beam machine 1 as a thermal cutting machine places a work W as a material to be processed on a work table 3 which is laid horizontally, and the work table 3 is placed on the work table 3. With the laser processing head 7 attached to the tip of the protruding arm portion 5, the laser beam L
The work W is irradiated with B to thermally cut the work W.

The laser beam LB is used by the laser processing machine 1
The laser beam is oscillated by a laser oscillation device 11 provided in the main body 9 and is guided to the laser processing head 7 via an intensity adjusting device 13 for the laser beam LB and a bend mirror 15. A condenser lens 17 is provided inside the laser processing head 7,
The laser beam LB is condensed by the condensing lens 17, is irradiated on the surface of the work W from the laser nozzle 19 provided at the tip of the laser processing head 7, and the work W is thermally cut.

The work W is gripped by a work clamp 21 provided on the back side (left side in the figure) of the work table 3,
The work table 3 is horizontally moved so that the position to be cut is directly below the laser processing head 7. This horizontal movement is due to the work clamp 21. The work clamp 21 is in the front-back direction (X-axis direction) in the drawing.
The carriage 23 is configured to be moved along a carriage 23 that is movably provided to the carriage 23, and the carriage 23 is moved in the left-right direction (Y-axis direction) in the drawing. The laser processing head 7 is moved in the vertical direction (Z-axis direction) in the drawing by a servo motor (not shown), and the work W is thermally cut into a predetermined shape. Further, the laser processing machine 1 is provided with an NC device 25, and the NC device 25 is provided with a manual pulse generator 27, and the work W gripped by the work clamp 21 is the NC device 25. Is configured to be controlled to move in the X-axis direction and the Y-axis direction.

Immediately below the laser processing head 7 described above,
As shown in FIG. 1, a cutting plate 31 having a suction hole 29 is provided in the center for letting spatter and the like escape downward. The cutting plate 31 is fixed to the work table 3, and the cutting plate 31 is provided below the cutting plate 31.
And a cylindrical edge portion 33 having substantially the same diameter as that of the above, and a dust collecting pipe 35 formed in a funnel shape is provided below the cylindrical edge portion 33. A liquid delivery pipe 39 having a plurality of nozzles 37 for generating a spiral liquid jet is provided on the inner surface of the dust collecting pipe 35 on the outer periphery of the cylindrical edge portion 33 of the dust collecting pipe 35.

As shown in FIG. 2, the nozzle 37 faces slightly inward from the tangential direction of the cylindrical lip portion 33,
Further, they are directed slightly downward of the cylindrical edge portion 33, and the ejection directions are arranged in the same direction at equal intervals. Therefore,
When the pressurized liquid is ejected from the nozzle 37, it acts so as to form a spiral jet flow on the funnel-shaped inner surface of the dust collection pipe 35. Due to the spiral liquid jet flowing in the dust collecting pipe 35, spatters and the like generated during laser processing fall into the dust collecting pipe 35 through the suction holes 29 of the cutting plate 31, are washed by the spiral liquid jet and are collected. It is discharged from the lower end of 35.

This kind of suspension containing the released spatter is treated by a dust collecting treatment device 41 provided separately.
As shown in FIG. 1, this dust collecting apparatus 41 can also be provided integrally with a dust collecting pipe 35, and a flexible liquid feeding passage (not shown) is provided at the lower end of the dust collecting pipe 35. Can be attached and installed separately, but in the present embodiment, they will be described below as being integrally provided.

The dust collecting apparatus 41 has a sealed container 43 and a dust collecting pipe 35 in which an intermediate portion is packed 45.
The filters 47 are closely attached to each other, and one side thereof is provided with a plurality of detachable filters 47 which are erected from the bottom surface. The filter 47 reaches the inner wall surface from the front side wall surface of the container 43 and is installed so as to form a plurality of isolation chambers in the container 43. This filter 47 is made of Saran (one of the fibers) in a lock shape and allows liquid to pass through but solids cannot. It is designed to pass only liquid.

At the end of the container 43 through the dust collecting pipe 35 and the filter 47, the outside is covered with a cylindrical filter case 49, and a paper filter 51 made of a cylindrical fiber paper is provided inside the container 43. A circulation pump 55, which is built-in and has a liquid absorption pipe 53 in the center, is provided.
9 is connected. By the operation of the circulation pump 55, the liquid accumulated in the container 43 is filtered and is again circulated and ejected from the liquid supply pipe 39 through the nozzle 37 into the dust collecting pipe 35 as a spiral liquid jet.

On the other side of the container 43 opposite to the side where the filter 47 is provided, a plurality of partition walls 59 having upper and lower open ports and a semi-partition wall extending from the upper part to the middle position of the container 43. A partition 63 is provided by alternately combining 61 and 61, and a plurality of spray nozzles 65 for spraying a liquid in a spray form are provided at a plurality of locations in the container 43 which is the upper part of the partition 59. Each of the spray nozzles 65 is connected to the pipe 57 of the circulation pump 55, and a spray layer is formed in the partition wall 63 by the operation of the circulation pump 55. The sucked stimulating gas (fume or the like) is removed by the spray layer and is released to the outside air by the blower 69 through the air filter 67 provided on the wall surface of the container 43.

The air filter 67 is housed in a large diameter portion of a hollow cylindrical tube 71 having a small diameter in the front and rear, and has a ventilation fan 75 attached to a motor 73 at the other end, and the cutting plate 31 is operated by the operation of the motor 73. Discharge hole 29
More fumes, etc. are sucked in, and only the gas is made into a clean gas through the spray layer, and the blower 69 blows the hollow cylindrical pipe 71.
Since it is released to the outside air through the, it does not impair the working environment in the factory.

In the dust collecting processing apparatus of the laser processing machine according to the present embodiment described above, the dust collecting processing apparatus 41 side is operated at the same time when the laser processing machine 1 is switched on, and the spatter and fume generated during the laser processing are cut by the cutting plate. 31 is sucked through the suction hole 29, and is made to flow down into the container 43 by the spiral liquid jet in the dust collection pipe 35, solids such as spatter are removed by the filter 47, and finer ones are filtered by the filter case 49 of the circulation pump 55. Since it is removed by the paper filter 51 inside, the liquid can be circulated and reused in the cylindrical rim 33 and the spray nozzle 65 as clean. On the other hand, gas such as fumes is drawn by the blower 69 provided in the container 43, and the stimulating odor is removed by the spray layer in the partition wall 63.
It is released into the outside air as clean gas through the air filter 67.

By periodically exchanging the various filters and liquids in the container 43, clogging of spatters and environmental pollution due to fumes, which are problems which have conventionally occurred when the laser processing machine 1 is used, are This can be completely removed, and the recovery processing can be performed. Further, the liquid may simply be water and is excellent in economic efficiency.

The present invention is not limited to the above-mentioned embodiment, but by making appropriate changes,
It can also be implemented in other modes. A laser processing machine has been described as an example of the thermal cutting processing machine, but a plasma processing machine or the like is also applicable.

[0025]

As described above, according to the present invention,
Since the configuration is as described in the claims,
It has the advantage of preventing spatter from adhering and growing inside the dust collection pipe, and of being able to completely collect dust, fumes, etc. generated during laser processing, which has the advantage of keeping the working environment in the factory extremely clean. is there.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a dust collection processing device of a laser processing machine according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view taken along the line II-II of FIG.

3 is a side view of the laser beam machine shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Laser processing machine 3 Work table 7 Laser processing head 35 Dust collecting pipe 37 Nozzle 41 Dust collecting device 43 Dust collecting pipe 55 Circulation pump 63 Partition wall 67 Air filter 69 Blower

Claims (2)

[Claims] 1. A work table placed directly below the processing head, which is a thermal cutting machine for irradiating a work placed on a work table with a heat cutting beam from the processing head to perform cutting processing on the work. In order to process spatter etc. generated at the time of heat cutting processing, a dust collection pipe equipped with a plurality of nozzles for ejecting a spiral liquid jet is provided in the lower part of the, and a dust collection treatment device for treating waste liquid is provided. Dust collection processing device of the characteristic heat cutting machine. 2. The dust collecting apparatus has a circulation pump for accommodating the liquid ejected from the nozzle at a lower portion thereof, and a circulation pump for filtering the contained liquid and circulating it to the nozzle again. A container provided with a plurality of partition walls on the other side to form a spray layer for cleaning the stimulating gas generated during the heat cutting process between the partition walls and a blower for discharging to the outside air through a filter. The dust collection processing device for a thermal cutting machine according to claim 1, further comprising: