WO2019049903A1

WO2019049903A1 - Rotating airflow generation device and laser machine tool

Info

Publication number: WO2019049903A1
Application number: PCT/JP2018/032930
Authority: WO
Inventors: 長谷川　明伸; 時誠郭
Original assignee: 株式会社アフレアー
Priority date: 2017-09-06
Filing date: 2018-09-05
Publication date: 2019-03-14
Also published as: JP2019042784A; JP6473914B1

Abstract

Provided are: a rotating airflow generation device for efficiently generating a rotating airflow; and a laser machine tool in which dust, etc., does not hinder the radiation of laser light. A rotating airflow generation device according to one aspect of the present invention has a cylindrical shape extending in a first direction, and comprises: a first cylinder part having a first outer peripheral wall; a second cylinder part provided on the outer side of the first outer peripheral wall of the first cylinder part, the second cylinder part having a second inner peripheral wall, and a space being configured between the first outer peripheral wall and the second inner peripheral wall; a central wall part provided between the first outer peripheral wall and the second inner peripheral wall, the central wall part partitioning the space, whereby a spiral-shaped flow path is configured in the space; a first lid part that closes one end, from among one end and another end in the first direction, of the space; and a second lid part that closes the side of the other end that is on the outer peripheral side from the central wall part; a rotating airflow being formed on the other-end side of the space due to the flow of air through the flow path.

Description

Rotating air flow generating device and laser processing machine

The present invention relates to a rotating air flow generating device and a laser processing machine.

BACKGROUND ART Conventionally, a cyclone-type dust collection device (such as a vacuum cleaner) using a rotating air flow has been considered. In the cyclone type dust collecting apparatus, the reduction of the suction efficiency is suppressed by separating the dust and the air by the rotating air flow.

For example, in Patent Document 1, air containing dust is taken in from the suction port disposed on the side wall of the vortex chamber, a swirling flow is generated in the vortex chamber to separate the dust, and disposed at the central axis position of the vortex chamber Discloses a dust collector that collects dust with the main filter.

Further, Patent Document 2 discloses a cyclone type separation unit that swirls dust-containing air to separate it into dust and air, a shower unit that jets water toward the cyclone type separation unit, and a waste liquid storage unit that contains waste liquid. A dust processing apparatus comprising: a drain means for discharging waste liquid; a filter means disposed in an inner cylinder of the cyclone type separation means; and an exhaust means for exhausting the air filtered by the filter means ing.

Further, in an apparatus for processing an object such as a laser processing machine, smoke and dust (hereinafter, also referred to as “dust or the like”) are generated from the object with the processing. For this reason, it is necessary to proceed processing while removing dust and the like during processing. Usually, in order to remove dust and the like, the generated dust and the like are sucked, and the sucked air is passed through an air filter to capture the dust and the like. Patent Document 3 discloses a configuration in which a dust collection duct surrounding a laser beam is disposed, a swirl flow is generated in the dust collection duct, and dust and the like are exhausted as the swirl flow.

JP, 2015-120138, A Japanese Patent Laid-Open No. 2004-001118 JP, 2015-174102, A

By generating a rotating air flow rising from the vicinity of the laser processing unit where dust etc. is generated, it is possible to prevent adhesion of dust etc. generated in the processing unit to the processing material, and generate a rotating air flow over a wide area. It is possible to carry out dust collection while stirring etc. As a result, it is possible to minimize the attenuation of laser light due to the density of dust and the like. For this reason, for example, in the case of using a rotating air flow in a dust collecting apparatus, a configuration for effectively generating the rotating air flow is desired. Further, it is important not only dust collection in laser processing but also dust collection in plasma processing and cutting processing, and ventilation and exhaustion in a specific area to effectively generate a rotating air flow. In particular, in a laser processing machine, if there is a large amount of dust and the like generated during processing, there is a fear of deterioration in processing quality due to adhesion to the processing material and dispersion of processing quality due to attenuation of laser light due to dust and so forth. is there. Therefore, when dust or the like is sucked by a dust collector during processing, it is important to treat the dust or the like not to remain in the irradiation path of the laser beam.

An object of the present invention is to provide a rotating air flow generating device that efficiently generates a rotating air flow, and a laser processing machine in which dust and the like do not interfere with laser light irradiation.

In order to solve the above-mentioned subject, one form of the present invention is a cylinder type extended in the 1st direction, and it is outside the 1st cylinder part which has the 1st outer peripheral wall, and the 1st outer peripheral wall of the 1st cylinder part. Provided between the first outer circumferential wall and the second inner circumferential wall, the second cylindrical portion having the second inner circumferential wall and defining a space between the first outer circumferential wall and the second inner circumferential wall; From an intermediate wall which constitutes a spiral flow path in the space by partitioning the space, a first lid which closes one end of one end and the other end in the first direction of the space, and an intermediate wall at the other end It also has a second lid that closes the outer peripheral side, and is a rotating air flow generating device in which a rotating air flow is formed on the other end side of the space by the flow of air through the flow path.

According to such a configuration, the intermediate wall portion is provided in the space provided between the first outer peripheral wall of the first cylindrical portion and the second inner peripheral wall of the second cylindrical portion to form a spiral flow path. Ru. Also, since one end of the space is closed by the first lid and the outer peripheral side of the other end is closed by the second lid, the first cylindrical portion and the intermediate wall at the other end of the space Between is open. By the flow of air from the opening into the flow path, the air flow is rotated at high speed along the spiral flow path, and a rotating air flow is efficiently formed on the other end side (outside region) of the space.

In the rotary air flow generation device, the intermediate wall portion includes a base portion connected to the second inner peripheral wall, a partition wall portion extending from the base portion along the second inner peripheral wall and the first outer peripheral wall, and a second inner side It may have a tip part which is not connected to a peripheral wall and the 1st peripheral wall. Thus, a spiral flow path is formed along the first outer peripheral wall and the second inner peripheral wall.

In the rotary air flow generation device, the intermediate wall portion has a first intermediate wall portion and a second intermediate wall portion overlapping each other in the first direction, and the tip portion of the first intermediate wall portion and the second intermediate wall portion The tip end portions may be arranged to be offset from each other in the circumferential direction. Thus, two spiral flow paths are formed at positions mutually offset in each of the first direction and the circumferential direction, and it is possible to more effectively generate the rotating air flow.

In the above-described rotary air flow generation device, the intermediate wall portion may have a first intermediate wall portion and a second intermediate wall portion which are disposed to be mutually shifted in the circumferential direction of the first outer peripheral wall. As a result, two spiral flow paths are formed at positions mutually offset in the circumferential direction, and it is possible to more effectively generate a rotating air flow.

The rotary air flow generation device may further include a skirt portion covering a predetermined region on the other end side of the space. Thus, it is possible to efficiently generate a rotating air flow in a certain area surrounded by the skirt portion.

The rotary air flow generation device may further include a suction unit for suctioning from a port communicating with the space. Thus, the air in the flow path is sucked to the outside through the port by suctioning in the suction portion, and the flow of air in the flow path by this suction generates a rotating air flow on the other end side of the space, and this rotating air flow Provides efficient suction.

One aspect of the present invention includes a laser emission head for emitting a laser beam to be irradiated to an object, and the above-mentioned rotating air flow generating device disposed above the object, and the laser beam is in the cylinder of the first cylinder portion The laser processing machine irradiates the object through the laser, and sucks the smoke or dust generated from the object while rotating it by a rotating air flow.

According to such a configuration, the rotary air flow generated by the rotary air flow generation device is formed above the object. Dust and the like are sucked while being rotated by the rotating air flow. At this time, dust and the like are sucked while being swirled in the area between the object and the rotary air flow generating device, so that a donut shaped area in which the dust and the like are not left is generated in the cylinder of the first cylinder part. The laser light can be applied to the object through the

According to the present invention, it is possible to provide a rotating air flow generating device that efficiently generates a rotating air flow, and a laser processing machine in which dust and the like do not hinder the irradiation of laser light.

It is a perspective view which shows the structural example of a laser processing machine. It is a perspective view which illustrates the dust collection nozzle to which the revolving airflow generation device concerning this embodiment is applied. It is a disassembled perspective view which illustrates a dust collection nozzle. (A) And (b) is a top view which illustrates the dust collection nozzle to which the rotational air flow production | generation apparatus which concerns on this embodiment is applied. It is sectional drawing which illustrates the dust collection nozzle to which the rotational air flow production | generation apparatus which concerns on this embodiment is applied. It is sectional drawing which illustrates the mode of the rotational air flow in the dust collection nozzle to which the rotational air flow production | generation apparatus which concerns on this embodiment is applied. It is a top view which illustrates the appearance of the revolving airflow in the dust collection nozzle to which the revolving airflow generation device concerning this embodiment is applied. It is a perspective view which illustrates other skirt parts. It is a top view which shows the other example (the 1) of a rotational air flow production | generation apparatus. (A) And (b) is a top view which shows the other example (the 2) of a rotational air flow production | generation apparatus. It is a disassembled perspective view which shows the other example (the 2) of a rotational air flow production | generation apparatus. It is a top view which illustrates the other example (the 1) of an intermediate wall part. It is a top view which illustrates the other example (the 2) of an intermediate wall part. It is a perspective view which shows the other example (the 3) of a rotational air flow production | generation apparatus.

Hereinafter, embodiments of the present invention will be described based on the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described will be omitted as appropriate.

(Configuration of laser processing machine)
FIG. 1 is a perspective view showing a configuration example of a laser processing machine.
A laser beam machine 100 shown in FIG. 1 is a device that performs processing such as cutting of an object W using energy of laser light L.

The laser processing machine 100 includes a processing machine main body 110, a stage 120, a laser emission head 130, a dust collection nozzle 140, and a moving unit 150. The rotary air flow generating device 1 according to the present embodiment is applied to a dust collection nozzle 140. In the processing machine main body 110, switches 111 are disposed on the front, and a power supply unit, a control circuit, a negative pressure pump and the like (not shown) are incorporated inside. In the vicinity of the processing machine main body 110, input / output devices such as a display 115, a keyboard 116 and a mouse 117 are disposed, and setting, reading, storage and processing control of various processing conditions by a processing program can be performed.

The stage 120 is disposed on the processing machine main body 110 and is movable in one direction (for example, the Y-axis direction). The object W is placed on the stage 120. The object W is adsorbed and fixed on the stage 120 by, for example, negative pressure.

The moving unit 150 is configured, for example, in a portal shape, and is disposed, for example, above the stage 120. The laser emission head 130 is attached to the moving unit 150. The laser emission head 130 is movable in one direction (for example, the X-axis direction) by the moving unit 150. In the present embodiment, the moving unit 150 moves the laser emission head 130 in the X-axis direction and the stage 120 in the Y-axis direction, and the relative positional relationship between the laser light L and the object W along the XY axes. However, one of the moving unit 150 and the stage 120 may be configured to be movable along the XY axis.

The laser beam emitting head 130 condenses the laser beam L by an optical system (not shown) and irradiates it onto the object W. In the present embodiment, the laser emission head 130 can scan the irradiation range of the laser light L by changing the irradiation angle of the laser light L by the scan mirror. The laser emission head 130 is, for example, a galvano scanner head. The object W to be processed is, for example, various materials such as metal, resin, paper, and wood.

The dust collection nozzle 140 sucks and collects dust and the like generated from the object W when performing laser processing. In the present embodiment, the dust collection nozzle 140 is disposed above the object W. The dust collection nozzle 140 is provided with a cylindrical skirt portion 50 that surrounds the irradiation range of the laser light L emitted from the laser emission head 130. Further, the dust collection nozzle 140 is provided with a suction duct 145, and the dust and the like collected by the dust collection nozzle 140 are suctioned up via the suction duct 145.

The laser processing machine 100 may be provided with a dust collection and separation unit 170. The dust collection and separation unit 170 is provided between the suction duct 145 and the exhaust duct 35. The dust collection and separation unit 170 serves as a filter that separates dust and the like sucked from the dust collection nozzle 140 from the air.

In order to process the object W with such a laser processing machine 100, first, the object W is placed on the stage 120 and fixed by suction or the like. Next, when the processing procedure is set and executed by a predetermined program, the laser beam L is irradiated from the laser emitting head 130 onto the object W, and the energy of the laser beam L processes the object W (cutting, grooving, marking Etc.). The irradiation position of the laser beam L is controlled by the scanning of the laser beam L and the operations of the stage 120 and the moving unit 150 by program processing.

A suction device (suction unit) (not shown) is connected to the subsequent stage of the dust collection and separation unit 170, and suction processing is performed by the laser processing machine 100, and suction of dust and the like is performed by negative pressure generated by the suction device. That is, dust and the like generated from the object W by processing is collected by the dust collection nozzle 140 by the suction force by the negative pressure of the suction device, and is sent to the exhaust duct 35 via the suction duct 145.

When the dust collection and separation unit 170 is provided, dust and the like sucked by the rotary air flow generated inside the dust collection and separation unit 170 is centrifuged. Then, air from which dust and the like have been removed is discharged from the suction device via the exhaust duct 35.

(Details of the dust collection nozzle)
FIG. 2 is a perspective view illustrating a dust collection nozzle to which the rotary air flow generation device according to the present embodiment is applied.
FIG. 3 is an exploded perspective view illustrating the dust collection nozzle.
The rotary air flow generating device 1 applied to the dust collection nozzle 140 rotates the air outside the dust collection nozzle 140 (for example, the lower space) with the rotary air flow generated in the dust collection nozzle 140 to generate a rotary air flow Have the ability to
In the dust collecting nozzle 140 shown in FIG. 2, a skirt 50 is provided below the main body 15. In addition, the skirt part 50 is abbreviate | omitted in the dust collection nozzle 140 shown in FIG. 3 for convenience of explanation.

As shown in FIG. 3, the rotary air flow generating device 1 applied to the dust collection nozzle 140 includes a first cylindrical portion 10, a second cylindrical portion 20, an intermediate wall portion 30, a first lid portion 41, and a second lid portion. And a lid portion 42. The first tubular portion 10 is provided in a tubular shape, and is disposed at an inner central portion of the main body portion 15. In the present embodiment, the first cylindrical portion 10 has a cylindrical shape. Here, the direction in which the cylinder of the first cylindrical portion 10 extends is referred to as a first direction D1. Further, the circumferential direction of the cylinder of the first cylindrical portion 10 will be referred to as the circumferential direction. The cylindrical first cylindrical portion 10 has a first outer peripheral wall 11 which is an outer wall of a cylinder and a first inner peripheral wall 12 which is an inner wall of the cylinder. In the laser processing machine 100, the laser beam L passes through the inside of the first cylindrical portion 10.

The second cylindrical portion 20 is provided outside the first outer peripheral wall 11 of the first cylindrical portion 10. That is, the second cylindrical portion 20 is provided to surround the outside of the first cylindrical portion 10 in the circumferential direction. The second cylindrical portion 20 has a second inner circumferential wall 22. The second inner circumferential wall 22 is disposed outside the first outer circumferential wall 11, and a space S is formed between the first outer circumferential wall 11 and the second inner circumferential wall 22. The second cylindrical portion 20 constitutes the outer periphery of the main body portion 15 and includes a port P. The port P communicates with the space S. In the illustrated example, two ports P are provided.

The intermediate wall portion 30 is a member which is provided between the first outer peripheral wall 11 and the second inner peripheral wall 22 and which constitutes the spiral flow path R in the space S by partitioning the space S. Here, the spiral shape is a curve (helical type) that moves away from the center as it turns (or approaches if it travels in the opposite direction), and may turn once or more, or turns less than 1 turn ( It may be a logarithmic curve shape). In the illustrated example, two intermediate wall portions 30 are provided. Each intermediate wall portion 30 includes a root portion 31 connected to the second inner circumferential wall 22, a partition wall portion 32 extending from the root portion 31 along the second inner circumferential wall 22 and the first outer circumferential wall 11, and 2 has a tip 33 not connected to the inner circumferential wall 22 and the first outer circumferential wall 11;

By providing the intermediate wall portion 30, the space S is divided into a region on the first outer circumferential wall 11 side and a region on the second inner circumferential wall 22 side. Since the tip end portion 33 of the intermediate wall portion 30 is not connected to the second inner peripheral wall 22 and the first outer peripheral wall 11, the flow path R which becomes spiral in the circumferential direction is formed in the space S. In the illustrated example, since two middle wall portions 30 are provided, two spiral flow paths R coaxial with each other are formed in the space S.

The first lid 41 is provided to close one end of one end and the other end of the space S in the first direction D1. That is, the first lid 41 is provided to be in contact with one end in the first direction D1 of each of the first cylindrical portion 10, the second cylindrical portion 20, and the intermediate wall portion 30.

A hole 41 h is provided at the center of the first lid 41. The diameter of the hole 41 h is larger than the diameter of the first inner peripheral wall 12 and smaller than the diameter of the first outer peripheral wall 11. The first lid portion 41 is attached such that the first cylindrical portion 10 and the hole 41 h coaxially overlap on one end side.

The second lid 42 is provided to close the outer peripheral side of the intermediate wall 30 at the other end of the space S. That is, the second lid 42 is provided in contact with the other end of each of the second cylindrical portion 20 and the intermediate wall 30 in the first direction D1, and the other end of the first cylindrical portion 10 in the first direction D1 Is not in touch. Since the second lid 42 is not in contact with the other end of the first cylinder 10, an opening C (see FIG. 5) is formed between the other end of the first cylinder 10 and the intermediate wall 30. . In addition, although the 2nd cover part 42 may be in contact with the other end of the 1st cylinder part 10 in part, the opening C should just be comprised.

A hole 42 h is provided at the center of the second lid 42. The diameter of the hole 42 h is larger than the diameter of the first outer peripheral wall 11 and smaller than the diameter of the intermediate wall 30 (the diameter when the intermediate wall 30 is equivalent to a circle when viewed in the first direction D1). The second lid portion 42 is attached such that the hole 42 h is disposed on the inner peripheral side of the intermediate wall portion 30 at the other end side. Here, in the rotary air flow generating device 1 and the dust collection nozzle 140, the side provided with the first cover 41 is referred to as one end, and the side provided with the second cover 42 is referred to as the other end.

FIGS. 4A and 4B are plan views illustrating a dust collection nozzle to which the rotary air flow generation device according to the present embodiment is applied. FIG. 4A shows a state in which the first lid 41 is attached, and FIG. 4B shows a state in which the first lid 41 is removed. Moreover, for convenience of explanation, the range of the second lid 42 is indicated by hatching in FIG. 4 (b).
FIG. 5 is a cross-sectional view illustrating a dust collection nozzle to which the rotary air flow generation device according to the present embodiment is applied. FIG. 5 shows a cross-sectional view taken along line AA shown in FIG. 4 (b).

As shown to Fig.4 (a), in the state in which the 1st lid part 41 was attached, all the one end sides in space S are closed. On the other hand, as shown in FIG. 4B, in the state where the second lid 42 is attached, the outer peripheral side is closed more than the intermediate wall 30 at the other end side in the space S, and the intermediate wall 30 and the first cylinder The space between the unit 10 and the unit 10 is open.

In the state where both the first lid 41 and the second lid 42 are attached, the hole 41 h is positioned at one end of the first cylindrical portion 10 and the hole 42 h is positioned at the other end. The inside of the cylinder portion 10 is in a state of penetrating in the first direction D1 through the

holes

41h and 42h.

As shown in FIG. 5, the outer circumferential side of the space S with respect to the intermediate wall 30 is closed by both the first lid 41 and the second lid 42. The closed space S and the port P are in communication with each other.

On the other hand, the inner circumferential side of the space S with respect to the intermediate wall 30 is closed only by the first lid 41 at one end, and the other end is open. Therefore, the open end (open port C) on the other end side is provided in a ring shape along the first outer peripheral wall 11 of the first cylindrical portion 10. In addition, since the distal end portion 33 of the intermediate wall portion 30 is positioned in the middle of the flow path R configured in a spiral shape, the intermediate wall portion 30 is located on the first cylindrical portion 10 side and the second It plays a role of branching from the cylindrical portion 20 side.

(Rotating air flow)
Next, the rotating air flow will be described.
FIG. 6 is a cross-sectional view illustrating the state of the rotary air flow in the dust collection nozzle to which the rotary air flow generation device according to the present embodiment is applied.
FIG. 7 is a plan view illustrating the state of the rotary air flow in the dust collection nozzle to which the rotary air flow generation device according to the present embodiment is applied. For convenience of explanation, the first cover 41 and the second cover 42 are not shown in FIG. 7.

In the dust collection nozzle 140, a suction duct 145 is connected to the port P, and air in the space S is sucked from the port P. Due to this suction, the flow path R becomes negative pressure, and air is sucked into the flow path R from the open port C. The air sucked into the flow path R flows along the first outer peripheral wall 11 of the first cylindrical portion 10 and rotates along the spiral flow path R. Of the air that rotates along the first outer peripheral wall 11, a part of the air is branched by the intermediate wall 30 and travels to the port P along the second inner peripheral wall 22. The remaining air continues to rotate along the first outer circumferential wall 11.

Here, since the opening C is provided in a ring shape, the air on the other end side of the first cylindrical portion 10 is also sucked in a ring along the opening C. Then, the air is sucked into the flow passage R narrower than the opening C, whereby the flow velocity of the air rotating along the first outer peripheral wall 11 is rapidly increased and the high-speed swirling along the flow passage R . The rotary air flow generated in the flow path R is referred to as a rotary air flow T1 in the flow path.

Then, with the high-speed turning of the rotational air flow T1 in the flow path, the air in the space between the hole 42h and the other end of the opening C also rotates. The rotating air flow generated in this space is referred to as the in-cylinder rotating air flow T2. Furthermore, the air in the external space (space between the dust collection nozzle 140 and the object W) on the other end side of the dust collection nozzle 140 is also rotated at high speed in accordance with the in-cylinder rotational air flow T2. The rotating air flow in this external space is referred to as the other end side rotating air flow T3. In addition, since the nozzle main body such as the inside of the first cylindrical portion 10 has a negative pressure, an air flow that rotates while air in the vicinity of the hole 41 h of the first lid portion 41 is drawn into the first cylindrical portion 10 is also generated. . This rotating air flow is referred to as one end side rotating air flow T4.

In the dust collection nozzle 140 according to the present embodiment, the flow velocity of the rotary air flow T1 in the flow passage is the fastest, then the in-cylinder rotary air flow T2, then the other end side rotary air flow T3, and then the one end side rotary air flow. It becomes order of T4. Each rotary air flow will turn around the axis of the cylinder of the first cylindrical portion 10, and accordingly, the other end side rotary air flow T3 generated in the outer space on the other end side of the dust collection nozzle 140 is also efficient It will turn to. Further, by optimizing the opening diameter of the hole 41 h and the height of the first cylindrical portion 10, it is possible to change the balance of the air flow on one end side and the other end side.

In the laser processing machine, the object W for processing is disposed on the other end side of the dust collection nozzle 140. Then, when the object W is irradiated with the laser beam L and processing is started, dust and the like are rolled up from the object W. At this time, the dust or the like soared is sucked into the flow path R from the opening C while being rotated by the rotating air flow generated by the dust collection nozzle 140. In the present embodiment, first, dust etc. is swirled on the other end side rotational air flow T3, then is carried on the in-cylinder rotational air flow T2 and drawn into the dust collection nozzle 140, and flows further from the opening C while continuing the swirling. The air is sucked into the passage R and is discharged from the port P on the rotating air flow T1 in the flow passage.

Dust and the like that are rotated by the rotating air flow easily pivot at a position away from the center due to the centrifugal force due to their weight. For this reason, the vicinity of the center of the rotating air flow has less dust and the like than the surroundings. That is, dust and the like swirling in a swirling manner along the rotating air flow increases outside the first cylindrical portion 10 as viewed in the first direction D1, and decreases in the cylinder of the first cylindrical portion 10 Donut).

In the laser processing machine, the laser beam L passes through the inside of the first cylindrical portion 10 and is irradiated to the object W. Since dust and the like sucked by the dust collection nozzle 140 donut, the laser light L passes through a central region (a region with almost no dust and the like) of the dust and the like. Therefore, the laser beam L can reach the object W without being greatly affected by dust and the like.

Here, when scanning the laser light L, the irradiation area of the laser light L does not interfere with the dust collection nozzle 140 by setting the inside of the first cylindrical portion 10 as the scan range. By setting the size of the rotating air flow generated by the dust collection nozzle 140 in accordance with the irradiation area (scan range) of the laser light L, even if it is the laser light L to be scanned, obstruction by dust etc. can be suppressed. .

Further, in the rotary air flow generating device 1 according to the present embodiment, one end side of the space S is closed by the first lid portion 41, and the dust and the like are sucked from the other end side provided with the opening C. That is, the pressure on the other end side (second lid portion 42 side) is lower than the pressure on the one end side (first lid portion 41 side) of the dust collection nozzle 140. Therefore, it can be effectively suppressed that the dust and the like soared are directly sucked from the one end side of the dust collection nozzle 140 without being swirled. That is, suction from the open port C on the other end side of the dust collection nozzle 140 is dominant, and soaring of dust and the like can be suppressed.

In the laser beam machine 100, the laser beam L irradiated from one end side of the dust collection nozzle 140 reaches the object W through the

holes

41h and 42h. If dust and the like soar during processing and come to one end side of the dust collection nozzle 140, there is a possibility that the dust and the like coming around may interfere with the irradiation of the laser beam L. In the present embodiment, since the inflow of dust and the like to the one end side is suppressed, it is possible to effectively prevent the hindrance of the irradiation of the laser beam L. Further, even if dust and the like soar and come to one end side, it is drawn in a donut shape by the one end side rotational air flow T4 generated at one end side of the dust collection nozzle 140. Further, dust or the like which is going to go out from the hole 41h is pushed back by the one end side rotational air flow T4. Therefore, it can be effectively suppressed that the dust and the like soared out interfere with the irradiation of the laser light L, and the dust and the like can be prevented from coming into contact with the optical device installed at one end side of the dust collection nozzle 140 it can. The one end side rotational air flow T4 minimizes the attenuation of the flow of the rotational air flow T1 in the flow path by minimizing the opening diameter of the hole 41h and the height of the first cylindrical portion 10, and the one end side It is possible to protect the optical equipment of

Here, a general cyclone-type dust collecting apparatus (vacuum cleaner or the like) performs centrifugal separation of dust and the like by a rotating air flow. However, in the present embodiment, not only the rotary air flow is generated inside the rotary air flow generation device 1, but the rotary air flow (other end side rotary air flow T3) is effectively generated also in the space outside the rotary air flow generation device 1. ing. This promotes the donut formation of swirling dust and the like and prevents the dust and the like from interfering with the irradiation of the laser light L, and thus the technical idea is totally different from that of a general cyclone type dust collector. is there.

More specifically, in a general cyclone-type dust collector, a swirling flow is generated to centrifuge dust and the like, and the separated air is discharged from the center of the swirling flow. However, the dust collection nozzle 140 to which the rotary air flow generation device 1 according to the present embodiment is applied generates rotary air flow not only to the inside of the nozzle but also to the outside to draw in dust etc. Discharge (without discharging from the central hole 41h). As a result, dust and the like can be efficiently sucked and discharged by being put on the rotating air flow.

FIG. 8 is a perspective view illustrating another skirt portion.
In the rotary air flow generation device 1 according to the present embodiment applied to the dust collection nozzle 140, the shape of the skirt portion 50 may be other than a cylindrical shape. A frusto-conical skirt 50 is illustrated in FIG. The diameter of the frusto-conical skirt portion 50 increases with distance from the main body portion 15 of the dust collection nozzle 140. On the other hand, the diameter decreases as the main body portion 15 is approached. With the skirt portion 50 having such a shape, the rotational speed of the rotary air flow in the skirt portion 50 increases as it approaches the main body portion 15, and the rotary air flow can be generated efficiently.

The shape of the skirt portion 50 may be other than these. That is, the shape of the skirt portion 50 may be a cylindrical shape, a truncated cone shape, a trumpet shape, an inverted truncated cone shape, or the like.

(Another example of a rotating air flow generating device)
FIG. 9 is a plan view showing another example (No. 1) of the rotary air flow generation device. For convenience of explanation, the first lid 41 and the second lid 42 are not shown in FIG.
The rotary air flow generating device 1 shown in FIG. 9 includes one intermediate wall portion 30 between the first outer peripheral wall 11 of the first cylindrical portion 10 and the second inner peripheral wall 22 of the second cylindrical portion 20. In the intermediate wall portion 30, a partition wall portion 32 extending from the root portion 31 to the tip end portion 33 is provided over about a half circumference (about 180 degrees) in the outer periphery of the first cylindrical portion 10. In the rotary air flow generation device 1, there is one port P communicating with the space S.

Thus, by providing the relatively long intermediate wall portion 30, it is possible to clearly configure the spiral shape of the flow passage R configured by the intermediate wall portion 30. In the example shown in FIG. 9, a spiral flow passage R is formed around the circumference of the first cylindrical portion 10 for approximately one and a half. Thus, it is possible to efficiently generate a rotating air flow while the air sucked from the open port C flows to the port P through the spiral flow path R.

FIGS. 10A and 10B are plan views showing another example (No. 2) of the rotary air flow generating device.
FIG. 11 is an exploded perspective view showing another example (No. 2) of the rotary air flow generation device. The first lid 41 and the second lid 42 are not shown in FIGS. 10 and 11 for convenience of explanation.

In the rotary air flow generating device 1 shown in FIGS. 10 and 11, the intermediate wall portion 30 has a first intermediate wall portion 301 and a second intermediate wall portion 302. The first intermediate wall portion 301 is shown in FIG. 10 (a), and the second intermediate wall portion 302 is shown in FIG. 10 (b). As shown in FIG. 11, the first intermediate wall portion 301 and the second intermediate wall portion 302 are arranged to overlap each other in the first direction D1.

The distal end portion 33 of the first intermediate wall portion 301 and the distal end portion 33 of the second intermediate wall portion 302 are arranged to be mutually offset in the circumferential direction. For example, although the root portion 31 of the first intermediate wall portion 301 and the root portion 31 of the second intermediate wall portion 302 are substantially at the same position, the lengths of the extending partition walls 32 are different. The length of the partition wall 32 of the first intermediate wall 301 is shorter than the length of the partition 32 of the second intermediate wall 302. For example, the circumferential angle in which the partition wall 32 of the first intermediate wall 301 extends is about 10 to 90 degrees, preferably about 20 to 30 degrees, and the partition wall of the second intermediate wall 302 The 32 extending circumferential angles are about 90 degrees to about 270 degrees, preferably about 170 degrees to about 180 degrees. It is preferable that these angle differences be around 180 degrees.

The first intermediate wall portion 301 forms a spiral flow path R1 in the circumferential direction, and the second intermediate wall portion 302 forms a circumferential spiral flow path R2. The flow paths R1 and R2 are configured to be offset from each other in the first direction D1 and the circumferential direction. Therefore, these two spiral flow paths R1 and R2 generate a two-stage rotary air flow in the first direction D1, thereby effectively generating a rotary air flow in the space on the other end side of the rotary air flow generation device 1 Be done.

In the example shown in FIGS. 10 and 11, the first intermediate wall portion 301 and the second intermediate wall portion 302 constitute two stages of flow paths R1 and R2, but three or more intermediate wall portions form three stages. You may comprise the above flow path. In addition, the first intermediate wall portion 301 and the second intermediate wall portion 302 may be formed as separate parts and overlaid, or may be integrally formed.

(Another example of the middle wall)
FIG. 12 is a plan view illustrating another example (part 1) of the intermediate wall portion. For convenience of explanation, the first cover 41 and the second cover 42 are not shown in FIG. Further, FIG. 12 shows an example in which the rotary air flow generation device 1 is applied to the dust collection nozzle 140 of the laser processing machine 100.

In the dust collection nozzle 140 shown in FIG. 12, tip portions 33 of the two intermediate wall portions 30 are in contact with the first outer peripheral wall 11 of the first cylindrical portion 10. The respective leading end portions 33 of the two intermediate wall portions 30 are in contact with the first outer peripheral wall 11, whereby the start position of the in-flow path rotational air flow T1 formed on the outside of the first cylindrical portion 10 is divided into two. That is, the rotational air flow T1 in the flow path formed from one start position constitutes a path to reach one port P. Therefore, dust and the like sucked from any of the start positions are sent to the port P without being mixed with dust and the like sucked from the other start positions.

FIG. 13 is a plan view illustrating another example (part 2) of the intermediate wall portion. For convenience of explanation, the first cover 41 and the second cover 42 are not shown in FIG. Further, FIG. 13 also shows an example in which the rotary air flow generation device 1 is applied to the dust collection nozzle 140 of the laser processing machine 100 as in FIG. 12.

In the dust collection nozzle 140 shown in FIG. 13, the tip end portion 33 of one intermediate wall portion 30 is in contact with the first outer peripheral wall 11 of the first cylindrical portion 10. As a result, the start position of the rotational flow T1 in the flow passage is one, and a strong rotational flow T1 in the flow passage is formed. Dust and the like are sucked from the one start position by the strong flow path rotational air flow T1 and sent to the port P.

In consideration of downsizing the dust collection nozzle 140, it is desirable to increase the flow passage area in order to minimize the pressure loss in the flow passage of the intake air. Further, when the port P is set to one place, it is considered that the disturbance of the air flow is also reduced as compared with the case of two places. As shown in FIG. 13, by configuring the tip end portion 33 of one intermediate wall portion 30 to be in contact with the first outer peripheral wall 11, one strong flow of the rotating air flow T1 in the flow path is in a state with less turbulence It becomes possible to perform effective dust collection by suppressing the pressure loss in the flow path when the dust collection nozzle 140 is downsized.

FIG. 14 is a perspective view showing another example (No. 3) of the rotary air flow generation device.
The rotary air flow generating device 1 shown in FIG. 14 is applied as an air conditioner for a room 1000. By arranging the rotary air flow generating device 1 according to the present embodiment on the ceiling portion 1100 of the room 1000, a rotary air flow can be generated in the air of the room 1000 and the room air can be moved to be agitated.

The rotary air flow generating device 1 may suction the air of the room 1000 or may send the air to the room 1000. When suctioning air, the air in the flow path R is sucked from the port P similarly to the dust collection nozzle 140, and when air is sent out, air is sent out from the port P into the flow path R. Do.

When providing the rotational airflow generation device 1 in the room 1000, it is preferable to provide the curved plate 1200 at the corner 1001 of the room 1000. For example, curved plates 1200 are arranged at four corners 1001 of the room. Each curved plate 1200 forms an R shape (arc shape) covering the corner 1001 when viewed in the first direction D1, and extends from the ceiling height to the first direction D1 by a predetermined length, for example. Thereby, the corner 1001 of the room 1000 is rounded, which is equivalent to the provision of the large skirt portion 50 surrounding the room 1000 by the four curved plates 1200 and the wall of the room 1000.

By providing the curved plate 1200, the rotary air flow generated by the rotary air flow generation device 1 effectively swirls in the room 1000. If the rotational airflow generation device 1 according to the present embodiment is applied as an air conditioner, the air conditioning efficiency of the room 1000 can be enhanced.

The rotary air flow generating device 1 can also be used as an air cleaner for the room 1000. Furthermore, the rotary air flow generating device 1 may be used as a device for sucking and collecting air inside or outside of a factory or the like, or may be used as a humidification device by sending out humidified air.

As described above, according to the embodiment, it is possible to provide the laser processing machine 100 in which the rotary air flow generating device 1 that generates the rotary air flow efficiently and dust and the like do not interfere with the irradiation of the laser light L.

Although the embodiment and the specific examples thereof have been described above, the present invention is not limited to these examples. For example, the laser emitting head 130 may be provided in an articulated arm in addition to the case where it is provided in the moving unit 150 that moves in one axial direction. Also, although the dust collection nozzle 140 is shown to be arranged to suction dust etc. from below, it may be arranged sideways so as to suction from the side, and the suction port is arranged facing up or obliquely You may do so. In addition, those in which the person skilled in the art appropriately adds, deletes, or changes the design of the components with respect to each of the above-described embodiments or the specific examples thereof and those in which the features of the respective embodiments are combined as appropriate As long as it comprises the gist, it is included in the scope of the present invention.

The rotary air flow generating device 1 according to the present embodiment is a processing machine other than the laser processing machine 100, for example, a laser welding machine, a heating device using energy other than a laser or laser, a cutting device using a blade, a three-dimensional modeling device (3D The present invention is suitably applicable to a processing machine such as a printer) which generates dust etc. during processing. In addition to the laser processing machine 100 and the indoor air conditioners, the rotary air flow generating device 1 is used for a dust collector that sucks and collects outdoor air, or for a blower that sends out air. It is also possible.

DESCRIPTION OF SYMBOLS 1 ... Rotational airflow generation apparatus 10 ... 1st cylinder part 11 ... 1st outer peripheral wall 12 ... 1st inner peripheral wall 15 ... Main body part 20 ... 2nd cylinder part 22 ... 2nd inner peripheral wall 30 ... Intermediate wall part 31 ... Root part 32 ... Partition wall portion 33 ... Tip portion 35 ... Exhaust duct 41 ... First lid portion 41 h ... Hole 42 ... Second lid portion 42 h ... Hole 50 ... Skirt portion 100 ... Laser processing machine 110 ... Processing machine main body 111 ... Switches 115 ... Display 116 ... Keyboard 117 ... Mouse 120 ... Stage 130 ... Laser emission head 140 ... Dust collection nozzle 145 ... Suction duct 150 ... Moving unit 170 ... Dust collection and separation section 301 ... First intermediate wall section 302 ... Second intermediate wall section 1000 ... Room 1001 ... corner 1100 ... ceiling portion 1200 ... curved plate C ... opening port D1 ... first direction L ... laser light P ... port R ... channel R1 ... channel R2 ... channel S ... space T1 ... rotating air inside channel T2 ... cylinder whirling current T3 ... the other end whirling current T4 ... one end side rotating airflow W ... object

Claims

A first cylindrical portion extending in a first direction and having a first outer peripheral wall;
A second cylindrical portion provided on the outer side of the first outer peripheral wall of the first cylindrical portion, having a second inner peripheral wall, and forming a space between the first outer peripheral wall and the second inner peripheral wall;
An intermediate wall portion which is provided between the first outer peripheral wall and the second inner peripheral wall and which forms a spiral flow path in the space by partitioning the space;
A first lid that closes the one end of the one end and the other end of the space in the first direction;
A second lid closing an outer peripheral side of the intermediate wall at the other end;
Equipped with
The rotational air flow generation device in which a rotational air flow is formed in the said other end side of the said space because air flows into the said flow path.
The middle wall portion is
A root connected to the second inner circumferential wall;
A partition wall extending from the root along the second inner peripheral wall and the first outer peripheral wall;
The rotary air flow generation device according to claim 1, further comprising: a tip portion not connected to the second inner peripheral wall and the first outer peripheral wall.
The intermediate wall portion has a first intermediate wall portion and a second intermediate wall portion overlapping each other in the first direction,
The rotary air flow generation device according to claim 1 or 2, wherein a tip of the first intermediate wall and a tip of the second intermediate wall are disposed to be mutually offset in the circumferential direction.
The rotary air flow generation device according to claim 1, wherein the intermediate wall portion has a first intermediate wall portion and a second intermediate wall portion which are disposed to be mutually shifted in the circumferential direction of the first outer peripheral wall.
The rotary air flow generation device according to any one of claims 1 to 4, further comprising a skirt portion covering a predetermined area on the other end side of the space.
The rotary air flow generation device according to any one of claims 1 to 5, further comprising a suction unit for suctioning from a port communicating with the space.
A laser emitting head for emitting a laser beam to be irradiated to an object;
The rotary air flow generating device according to claim 6, which is disposed above the object.
Equipped with
Irradiating the laser light through the inside of the cylinder of the first cylindrical portion to the object;
The laser processing machine which attracts, while making the smoke and dust which generate | occur | produce from the said target rotate by the said rotational airflow.