JP6171546B2 - Laser processing smoke cleaning device, laser processing device - Google Patents

Description

  The present invention relates to a laser processing smoke cleaning apparatus and a laser processing apparatus that remove smoke generated by laser processing.

Conventionally, there has been an apparatus for exhausting smoke generated during laser processing of a sheet (for example, Patent Document 1).
However, the conventional apparatus has an insufficient smoke exhausting function. For this reason, fine particles contained in the smoke may adhere to the periphery of the laser irradiation head, and this deposit may fall from the periphery of the laser irradiation head onto the sheet.

Japanese Patent Laid-Open No. 2002-160087

  An object of the present invention is to provide a laser processing smoke cleaning device and a laser processing device that can sufficiently remove smoke generated in a laser processing region from the processing region.

  The present invention solves the problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this. In addition, the configuration described with reference numerals may be improved as appropriate, or at least a part thereof may be replaced with another configuration.

The first invention is a laser processing smoke cleaning device (10, 60, 210) attached to a laser processing machine (1) for processing a processed sheet (W) in a feed direction (X1) and processing the processed sheet with laser light. 260), which is a shape in which air and smoke are introduced from a space where smoke is generated by laser processing , and the processed sheet side of the cylinder arranged so that the axial direction becomes the flow direction is opened. (50, 80) is provided.
-2nd invention is the laser processing smoke cleaning apparatus of 1st invention, The said laser processing machine changes the feed angle of the said processed sheet (W) by a bending part (2b), The said inflow The portion (52) is also arranged in the path of the processed sheet whose feed angle has changed at the bent portion, and the processed sheet side whose feed angle has changed at the bent portion is also open. It is a laser processing smoke cleaner.
-3rd invention is the laser processing smoke cleaning apparatus of 1st or 2nd invention, The front-end | tip (51a) of the said inflow part (51) is formed so that the space (A1) where smoke generate | occur | produces may be enclosed. It is the laser processing smoke cleaning apparatus characterized by this.

-4th invention is the laser processing smoke cleaning apparatus of any one of 1st to 3rd invention, and the laser irradiation part (3, 3) which performs laser processing by irradiating a processing sheet (W) with a laser beam . 203).

  According to the present invention, it is possible to provide a laser processing smoke cleaning device and a laser processing device that can sufficiently remove smoke generated in a laser processing region from the processing region.

It is sectional drawing which looked at the laser beam machine 1 of 1st Embodiment from this side Y1. It is sectional drawing which expanded a part of upper side Z2 rather than the process paper W of the laser beam machine 1 of 1st Embodiment. It is sectional drawing which looked at the cross section which cut | disconnected the periphery of the cleaning apparatus 10 of 1st Embodiment by the horizontal surface which passes the nozzle opening 31 from upper side Z2 (arrow 3-3 part sectional drawing of FIG. 2). It is sectional drawing which expanded a part of lower side Z1 rather than the processing paper W of the laser beam machine 1 of 1st Embodiment. It is sectional drawing which looked at the laser processing machine and cleaning apparatus 110 of the comparative example from the near side Y1. It is a perspective view of the laser beam machine 201 of 2nd Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional view of the laser beam machine 1 according to the first embodiment as viewed from the front side Y1.
FIG. 2 is an enlarged cross-sectional view of a part of the upper side Z2 of the processing sheet W of the laser beam machine 1 according to the first embodiment.
FIG. 3 is a cross-sectional view of the periphery of the cleaning device 10 according to the first embodiment taken along the horizontal plane passing through the nozzle port 31 as viewed from the upper side Z2 (a cross-sectional view taken along arrow 3-3 in FIG. 2).
FIG. 4 is an enlarged cross-sectional view of a part of the lower side Z1 of the processing sheet W of the laser beam machine 1 according to the first embodiment.
In the embodiment and the drawings, for the sake of clarity, for the sake of convenience, with reference to FIG. 1, the left-right direction in the laser processing region is defined as the feed direction X of the processed paper W, and the feed direction of the surface direction of the processed paper W The direction perpendicular to X, that is, the width direction of the processed paper W is defined as the depth direction Y. The laser processing machine 1 sends the processed paper W so that the surface (XY plane) of the processed paper W becomes a horizontal plane, and the normal direction of the surface of the processed paper W is the vertical direction Z.
Further, the upstream side in the feed direction X is the right side X2, and the downstream side is the left side X1. The laser irradiation direction is the vertical direction Z, and the processing paper W is irradiated with laser from the upper side Z2 toward the lower side Z1.
In addition, arrangement | positioning of the laser processing machine 1 is not limited to the said structure, For example, you may arrange | position the whole laser processing machine 1 inclining.

As shown in FIG. 1, the laser beam machine 1 is an apparatus that constitutes a part of a machining system.
This processing system is a system that manufactures a form or the like by performing printing, laser processing, or the like in-line while feeding the processed paper W (processed sheet) to the left side X1.
The laser processing machine 1 performs laser processing on the processing paper W among these processing. The laser processing machine 1 performs, for example, vertical perforation processing, marking processing, half cut processing, and the like.

The laser processing machine 1 includes rollers 2a and 2b (bending portions), an irradiation head 3 (laser irradiation portion), and a cleaning device 10 (laser processing smoke cleaning device).
The rollers 2a and 2b are rollers that feed the processed paper W in a region where laser processing is performed. The rollers 2a and 2b are disposed on the right side X2 and the left side X1 of the laser processing machine 1, respectively.
The laser beam machine 1 feeds the processed paper W in the horizontal direction between the rollers 2a and 2b. Then, the laser beam machine 1 changes the feeding direction of the processed paper W from the horizontal direction to the diagonally downward direction using the rollers 2a and 2b as bent portions.

The irradiation head 3 is a device that irradiates a laser beam 3a.
The irradiation head 3 includes a lens housing case 3b and a lens 3c.
The lens housing case 3b is a member that houses the lens 3c. The lens housing case 3b is supported by a driving device (not shown) so as to be drivable in the depth direction Y. The lens housing case 3b is driven in the depth direction Y when the laser irradiation position is adjusted during processing preparation or when the laser irradiation position is finely adjusted during processing.
The lens 3c is an optical member that receives the laser light 3a from the laser oscillation device (not shown) and directs the laser light 3a toward the processed paper W.

The cleaning device 10 is a device that cleans smoke generated from the processed paper W by laser processing.
The cleaning device 10 includes an upper cleaning device 20 and a lower cleaning device 60.

As shown in FIG. 2, the upper cleaning device 20 is a device that cleans the smoke S <b> 1 generated on the upper side Z <b> 2 of the processed paper W.
The upper cleaning device 20 includes a cylinder part 21, an upper outlet part 30, an in-cylinder outlet part 40, and an upper inlet part 50.
The cylindrical portion 21 is disposed at the lower end of the lens housing case 3b of the irradiation head 3, and is attached to the lens housing case 3b by screwing or the like. The upper side Z2 of the cylinder part 21 is a flange part 21a for an operator to grip when attaching or detaching. The upper side Z2 of the cylindrical portion 21 is not limited to the form in which the flange portion 21a is provided, and may have the same outer diameter as the lens housing case 3b.
The cylindrical part 21 is a cylindrical body, the axial direction is the vertical direction Z, and is arranged coaxially with the optical axis of the laser light 3a.
The cylinder part 21 is a cylindrical member whose inner diameter and outer diameter do not change. For this reason, the outer shape of the cross-sectional shape with the horizontal plane as the cross section has a constant size in any of the vertical directions Z.
The cylindrical part 21 has an open lower end 21b so that the laser beam 3a can pass through. The space on the lower side Z1 from the lower end 21b of the cylinder portion and the space on the left side X1 from the nozzle port 31 (described later) of the upper outflow portion 30 is a space in which smoke is generated on the upper side Z2 of the processed paper W by laser processing. (Hereinafter referred to as “upper smoke generation space A1”).

The upper outflow portion 30 is a member that flows out air toward the upper smoke generation space A1 in order to remove the smoke in the upper smoke generation space A1. The upper outflow portion 30 is integrally formed with the cylindrical portion 21 by welding or the like.
In addition, the upper outflow part 30 and the cylinder part 21 are not restricted to integral, The separated form may be sufficient.
The upper outlet 30 is connected to a delivery pipe 30a that sends out air. The delivery pipe 30a is connected to an air supply device (not shown) such as a pump.
The upper outflow portion 30 is disposed in the region on the right side X2 of the cylindrical portion lower end 21b.
The upper outlet 30 includes a nozzle port 31.
As shown in FIG. 3, the nozzle port 31 is elongated in the depth direction Y, and the length W <b> 31 in the depth direction Y is larger than the outer diameter d <b> 21 of the cylindrical portion 21. The opening direction of the nozzle port 31 is the left side X1.

With the above configuration, the upper outflow portion 30 compresses the air sent from the delivery pipe 30a inside, and then moves from the nozzle port 31 to the upper smoke generation space A1 toward the left side X1 along the feed direction X. It flows out vigorously.
When viewed from the upper side Z2 (see FIG. 3), the air that has flowed out of the nozzle port 31 tends to move in a manner in which there is a depth of length W31 in the depth direction Y, as shown in the movement space A31. For this reason, air passes the whole area | region of upper smoke generation space A1. That is, the air moves in a space (moving space A31) that is a space closer to the processed paper W than the cylinder lower end 21b and wider than the outer shape of the cylinder lower end 21b.

As shown in FIG. 2, the in-cylinder outflow part 40 is a member that flows out air into the inside of the cylinder part 21.
The in-cylinder outflow part 40 is connected to a delivery pipe 40a that sends out air from an air supply part (not shown).
The in-cylinder outflow part 40 includes a nozzle port 41 through which air flows out into the cylinder part 21.

The upper inflow portion 50 is a device that is disposed at the destination of the air that has flowed out of the upper outflow portion 30 and that flows in smoke generated by laser processing. The upper inflow portion 50 is connected to a suction pipe 50a that sucks air. The suction pipe 50a is connected to an air suction device (not shown) such as a pump.
The shape of the upper inflow portion 50 is such that a cylinder arranged so that the axial direction is the feed direction X is cut along a plane parallel to the processed paper W and opened to the processed paper W side.
The upper inflow portion 50 includes an upstream portion 51 and a downstream portion 52.

The upstream portion 51 extends from the vicinity of the upper smoke generation space A1 to the roller 2b (see FIG. 1).
When viewed from the upper side Z2 (see FIG. 3), the right end 51a of the upstream portion 51 has an arc shape that surrounds the cylinder portion 21 and the upper smoke generation space A1. The left end 51a of the upstream portion 51 is open. The opening of the right end 51 a is disposed to face the nozzle port 31. The length W51a in the depth direction Y (length in the depth direction Y) of the opening of the right end 51a is sufficiently larger than the outer diameter d21 of the cylindrical portion 21, and is longer than the length W31 of the nozzle port 31 in the depth direction Y. Is also big.

  As shown in FIG. 1, the downstream portion 52 is disposed in a portion of the movement path of the processed paper W where the feed angle is changed by the roller 2 b. The lower side Z1 (processed paper W side) of the downstream portion 52 is also cut and opened by a cutting surface parallel to the processed paper W fed in an inclined manner. The left side X1 of the downstream portion 52 is connected to the suction pipe 50a.

As shown in FIG. 4, the lower cleaning device 60 is a device that cleans the smoke S <b> 2 generated on the lower side Z <b> 1 of the processed paper W.
The lower cleaning device 60 includes a lower outflow portion 70 and a lower inflow portion 80.
The lower outflow portion 70 is a member similar to the upper outflow portion 30. That is, the lower outflow portion 70 is arranged on the lower surface side of the processed paper W, and air flows out from the right side X2 toward the left side X1, and outflows in a manner in which the depth is in the depth direction Y.
The lower inflow portion 80 is a device that is arranged at the air outflow destination of the lower outflow portion 70 and flows smoke generated on the lower side Z1 by laser processing. The lower inflow portion 80 is connected to a suction pipe 80a that sucks air. The suction pipe 80a is connected to an air suction device (not shown) such as a pump.

The lower inflow portion 80 includes an upstream portion 81 and a downstream portion 82.
The upstream part 81 is a member similar to the upstream part 51. That is, the upstream portion 81 has a shape in which a cylinder disposed so that the axial direction is the feeding direction X is cut and opened to the right side X2 and the upper side Z2 (processing paper W side). The upstream portion 81 extends from the vicinity of the area where smoke is generated on the lower side Z1 of the processed paper W (hereinafter referred to as “lower smoke generation space A2”) to the vicinity of the right side X2 of the roller 2b. .
Although illustration is omitted, the length in the depth direction Y of the opening of the right end 81 a of the upstream portion 81 is also longer than the length of the nozzle port 71 in the depth direction Y, as in the upper cleaning device 20.
The downstream portion 82 is a portion that is continuous with the left side X <b> 1 of the upstream portion 81. The downstream portion 82 escapes the roller 2b and guides the air flowing from the upstream portion 81 to the left side X1 to the lower side Z1 where the suction pipe 80a is disposed. For this reason, the downstream part 82 has a cross-sectional shape inclined diagonally. The lower side Z1 of the downstream portion 82 is connected to the suction pipe 80a.

The air flow of the laser beam machine 1 will be described.
In addition, the description of the following air flow includes the form assumed from the configuration of the laser processing machine 1, and the actual air flow is not limited to the following form.
As shown in FIGS. 1 to 3, at the time of processing, the upper outlet 30, the in-cylinder outlet 40, and the lower outlet 70 are constantly supplied with air from the delivery pipes 30 a, 40 a, 70 a, It always flows out from 41 and 71. Similarly, in the upper inflow portion 50 and the lower inflow portion 80, air is always sucked from the suction pipes 50a and 80a, and air is always flown from the opening.
(Generation of smoke due to laser processing)
A control unit (not shown) of the laser processing machine 1 performs laser processing on the processing paper W by irradiating the laser light 3a from the laser irradiation unit when the marking or the like of the processing paper W is read by a sensor.
When the processed paper W is irradiated with the laser light 3a, smoke S1 and S2 are generated on the upper side Z2 and the lower side Z1 of the processed paper W.

[Air flow in the upper space of processed paper]
(Air flow in upper smoke generation space A1 and its surroundings)
As shown in FIG. 2, the upper outflow part 30 flows out air to the left side X1 from the cylinder part lower end 21b toward the lower Z1 in the upper smoke generation space A1 toward the left side X1 (see arrow F1).
Further, immediately above the processed paper W, the air naturally flows from the right side X2 toward the left side X1 by feeding the processed paper W. Due to the influence of this air flow, air flows from the right side X2 toward the left side X1 in the entire upper smoke generation space A1 (not shown).

For this reason, the air from the upper outflow part 30 and the air by which the processed paper W is fed merge in the upper smoke generation space A1. The flow of the merged air becomes faster than the speed at the time of outflow from the upper outflow portion 30.
Thereby, the speed (relative speed) of air with respect to the processed paper W becomes slower than the actual speed of air. For this reason, the cleaning device can suppress the occurrence of turbulent flow in the upper part of the processed paper W and suppress the retention of the smoke S1.

In the upper smoke generation space A1, the air that has flowed out of the in-cylinder outflow portion 40 flows out of the opening of the tube portion 21 (see arrow F2) and merges with the air. In addition, since the upper side Z2 inside the cylinder part 21 includes the lens 3c and the like and is sealed, the air that has flowed out of the in-cylinder outflow part 40 flows out from the opening of the cylinder part lower end 21b.
For this reason, in the upper smoke generation space A1, air flows so as to descend to the lower side Z1 as it goes to the left side X1 (see arrow F3). Moreover, the upper outflow part 30 flows out air so that it may become movement space A31 (refer FIG. 4). Thereby, the smoke S1 is sufficiently removed from the processing region, and the laser processing machine 1 can perform laser processing satisfactorily.

The smoke S1 on the upper surface side of the processed paper W rises to the upper side Z2, and then moves along this flow.
For this reason, the smoke S <b> 1 rises in the space on the near side Y <b> 1 and the back side Y <b> 2 of the cylindrical portion 21, and the inflow into the cylindrical portion 21 is suppressed.
Further, since the air in the upper smoke generation space A1 descends toward the left side X1, contact with the cylinder lower end 21b and the like is suppressed.
Further, even after the air passes through the upper smoke generation space A1, the momentum is maintained to some extent, and movement to the upper side Z2 is suppressed (see arrow F4). For this reason, rising in the space of the near side Y1 and the back side Y2 of the cylinder part 21 is also suppressed.
Thereby, the cleaning apparatus 10 can suppress the contact of the smoke S1 to the cylinder part lower end 21b, the cylinder part 21, the outer peripheral surface of the irradiation head 3, and the like.
Moreover, since the cylinder part 21 is a cylinder, the outer peripheral surface is formed in parallel with the vertical direction Z, and there is no structure of the surface or protrusion etc. which face the lower side Z1, except for the flange part 21a. For this reason, even if smoke S1 moves from the cylinder part lower end 21b to the direction of arrow F4, etc., the cylinder part 21 is suppressed from contacting with the smoke S1. This effect will also be described in a comparative example described later.

(Air flow in upper inflow portion 50 and its surroundings)
The air that has passed through the upper smoke generation space A1 flows into the upper inflow portion 50.
The right end 51a of the upper inflow portion 50 is formed so as to surround the upper outflow portion 30 (see FIG. 4). For this reason, the upper inflow part 50 can surely flow in the air that has flowed out of the upper outflow part 30 and passed through the upper smoke generation space A1, using the opening in the right end 51a as an inflow port, together with the smoke S1.

In addition, the part which may contact smoke S1 among the external shapes of the upper inflow part 50 is the edge part of the right side front end 51a, and the lower edge part 51b.
However, since the length W51a in the depth direction Y of the opening is sufficiently larger than the upper smoke generation space A1 (see FIG. 4), the edge of the right tip 51a and the lower edge 51b are not in contact with the smoke S1. It is suppressed.
In addition, the concentration of the smoke S1 increases as it approaches the processed paper W, but the upper inflow portion 50 is open at the lower side Z1, so the upper inflow portion 50 is in a space where the concentration of the smoke S1 is high. This means that there is no structure.
For this reason, it is suppressed that smoke S1 contacts the external shape of the upstream part 51. FIG.

  The air that has entered the upstream portion 51 moves to the left side X1 toward the suction pipe 50a (see arrows F5a to F5c). For this reason, the smoke comes into contact with the inner wall 51c of the upstream portion 51, and particulates contained in the smoke are deposited. However, even if this deposit falls, the deposit rides on the air flow inside the upstream portion 51 and is sucked into the suction pipe 50a.

The flow of air immediately above the processed paper W will be described.
As the processed paper W is fed, the air immediately above the processed paper W may move to the left side X1 in the space immediately above the processed paper W (see arrow F6). This air moves to the upper side Z2 by the suction force from the opening of the lower edge portion 51b of the upstream portion 51 (see arrow F7). For this reason, even if the smoke S1 gets on the flow of air immediately above the processed paper W, the upstream portion 51 can suck the opening of the lower edge portion 51b as the suction port.
As described above, even when the deposit accumulated on the inner wall of the upstream portion 51 falls on the processed paper W, the upstream portion 51 is deposited from the opening of the lower edge portion 51b. We can expect to be able to inhale things.

(Air flow in the downstream portion 52)
As shown in FIG. 1, the air flowing from the upstream part 51 is guided to the inside of the downstream part 52. For this reason, the air flowing from the upstream portion 51 is smoothly guided to the inside of the downstream portion 52 without colliding with a structure such as a protrusion, and further sucked into the suction pipe 50a.
Moreover, since the lower side Z1 is opening the downstream part 52, contact with smoke is suppressed similarly to the upstream part 51.

  Furthermore, even if the deposit accumulated on the inner wall of the upstream portion 51 falls on the processing paper W, it can be expected that the downstream portion 52 can suck the deposit in the same manner as the upstream portion 51. In addition, since the feeding path of the processed paper W is bent diagonally to the left at the roller 2b portion, the fallen deposits are easily lifted from the processed paper W (see arrow A). For this reason, the downstream part 52 becomes easy to inhale the deposit which fell.

As described above, the upper cleaning device 20 can flow the smoke S1 generated on the upper side Z2 of the processing paper W by the laser processing from the upper inflow portion 50 while suppressing contact with the outer shape portion of the laser processing machine 1. Further, the upper cleaning device 20 has a structure in which there is no structure (a housing or the like) of the upper inflow portion 50 immediately above the processed paper W. For this reason, there is no structure to which fine particles adhere immediately above the processed paper W. Thereby, it is possible to suppress the deposit of fine particles from falling on the processed paper W.
Further, the processing paper W side of the downstream portion 52 is open. For this reason, the upper cleaning apparatus 20 can be configured such that the longer part of the feed path of the processed paper W has no structure to which fine particles adhere. Thereby, the upper cleaning device 20 can suppress the deposit of fine particles from falling on the processed paper W.
Furthermore, since the upper inflow portion 50 can suppress the accumulation of fine particles on the opening edge portion, there is little decrease in the inflow amount (suction force) of air.

[Air flow in the space below the processed paper]
As shown in FIG. 4, the air that flows out from the lower outflow portion 70 merges with the air that moves as the processed paper W is fed and has a width in the depth direction Y, like the upper outflow portion 30. , Move to the left side X1 (see arrow F11).
Moreover, since the upper side Z2 is opening the lower inflow part 80, the air in lower smoke generation space A2 moves so that it may move to lower Z1 as it moves to the left side X1. For this reason, the air in the lower smoke generation space A2 flows into the upstream portion 81 from the opening of the right tip 81a or the opening in the upper edge 81b (see F12).

The smoke S2 generated on the lower side Z1 of the processed paper W rides on the air and flows into the upstream portion 81.
Similarly to the upstream portion 51, the smoke S2 is guided to the inside of the upstream portion 81 while the contact with the outer shape of the upstream portion 81 (the edge of the right tip 81a and the upper edge 81b) is suppressed. For this reason, the lower cleaning device 60 can suppress the accumulation of fine particles on the outer shape of the upstream portion 81.

Like the upstream portion 51, the air that has entered the upstream portion 81 is considered to move toward the suction pipe 80a while diffusing (see arrows F13a to F13c).
At this time, since the smoke S2 comes into contact with the inner wall 81c of the upstream portion 81, fine particles accumulate on the inner wall 81c. However, on the lower side Z <b> 1 of the processing paper W, the deposit falls on the bottom 81 d of the upstream portion 81, and therefore does not come into contact with the processing paper W.

Also, immediately below the processed paper W, the air flowing along with the processed paper W is fed to the left side X1 by the suction force from the opening in the upper edge 81b of the upstream portion 81, as with the upper side Z2 of the processed paper W. Moves to the lower side Z1 (see arrow F14).
For this reason, even if the smoke S2 rides on the air flow, the upstream portion 81 can suck the smoke S2.

As shown in FIG. 1, the inner wall 82 c of the downstream portion 82 is in contact with the smoke, like the inner wall 81 c of the upstream portion 81, so that fine particles accumulate. However, since the downstream part 82 is connected to the suction pipe 80a, even if the deposit falls, the downstream part 82 sucks into the suction pipe 80a as it is.
In this way, the lower cleaning device 60 can suppress the deposited fine particles from adhering to the processed paper W even on the lower side Z1 of the processed paper W.

[Comparative example]
FIG. 5 is a cross-sectional view of the comparative laser processing machine and cleaning device 110 as viewed from the front side Y1.
Note that, in the description of the comparative example and the drawings, the same reference numerals or the same reference numerals are given to the portions that perform the same functions as those in the embodiment, and repeated descriptions are omitted as appropriate.
The cleaning device 110 includes a protective cover 121, an in-cover outflow portion 140, an upper inflow portion 150, and a lower inflow portion 180.
The protective cover 121 has a shape corresponding to the laser light path from the lens. That is, the protective cover 121 has a hollow conical shape and includes an opening 121a for irradiating a laser beam at the lower end.

With the above shape, the outer shape of the cross-sectional shape of the outer periphery of the protective cover 121 increases as it reaches the upper side Z2.
The in-cover outflow portion 140 is a member that outflows air into the space in the protective cover 121. The air that has flowed into the in-cover outflow portion 140 flows out from the opening 121a of the protective cover 121 toward the lower side Z1.
The upper inflow portion 150 flows in smoke S1 generated on the upper side Z2 of the processed paper W by laser processing. The upper inflow portion 150 is a cylindrical member. The upper inflow portion 150 is disposed on the left side X1 of the upper smoke generation space A1.
The lower inflow portion 180 flows in smoke S2 generated on the lower side Z1 of the processing paper W by laser processing. The lower inflow portion 180 is a cylindrical member. The lower inflow portion 180 is disposed on the left side X1 of the upper smoke generation space A1.

[Air flow in the space above the processed paper in the comparative example]
In the cleaning device 110 of the comparative example, the air flowing out into the upper smoke generation space A1 is only the air from the opening 121a of the protective cover 121. Further, the air in the upper smoke generation space A1 of the cleaning device 110 of the comparative example does not include the upper outflow portion 30.
For this reason, the air in the upper smoke generation space A1 of the comparative example is not in the form of passing through the entire area of the upper smoke generation space A1 as in the embodiment toward the left side X1 (see FIG. 3), but the protective cover 121. It simply tries to descend from the opening 121a.
On the other hand, the upper inflow part 150 flows in the air in the upper smoke generation space A1.

For this reason, the air in the upper smoke generation space A1 flows so as to descend to the lower side Z1 toward the left side X1, and flows into the upper inflow portion 150 (see arrow F101).
Moreover, since the air in upper smoke generation space A1 of a comparative example is not provided with the upper outflow part 30 like embodiment, compared with the cleaning apparatus 10 of embodiment, a flow rate becomes slow. For this reason, the cleaning device 110 of the comparative example has less of the generated smoke S1 that can flow into the upper inflow portion 150 compared to the cleaning device 10 of the embodiment.
The smoke S1 that could not flow into the upper inflow portion 150 moves to a space outside the upper smoke generation space A1 while diffusing.

A part of the smoke S1 moved to the upper side Z2 of the upper smoke generation space A1 moves to the left side X1 of the protective cover 121. As described above, the outer circumference of the outer periphery of the protective cover 121 increases as the cross-sectional shape reaches the upper side Z2. That is, since the outer peripheral surface 121b of the protective cover 121 faces obliquely downward, it easily comes into contact with smoke that has moved to the upper side Z2. For this reason, the fine particles P contained in the smoke S1 accumulate on the left side X1 of the outer peripheral surface 121b of the protective cover 121.
On the other hand, since the outer peripheral surface of the cylindrical portion 21 of the embodiment is formed in a direction parallel to the vertical direction Z, the contact with the smoke S1 is suppressed and the accumulation of the fine particles P can also be suppressed.

  In the comparative example, the other part of the smoke S1 that has moved to the upper side Z2 of the upper smoke generation space A1 contacts the edge of the left end 150a of the upper inflow portion 150. For this reason, the fine particles P are also deposited on the edge of the left end 150 a of the upper inflow portion 150.

In addition, the upper inflow part 150 is not a shape in which the lower side Z1 is opened like the upper inflow part 50 of the embodiment, but a cylindrical member. For this reason, the fine particles P are also deposited on the lower surface of the upper inflow portion 150 on the right tip 150a side.
Further, in the comparative example, the air flowing out from the opening 121a of the protective cover 121 simply tries to descend, so that the smoke S1 easily moves to the front side Y1 and the back side Y2 of the upper smoke generation space A1 (illustration is shown). Omitted).
For this reason, the fine particles P accumulate on the right end 150a of the upper inflow portion 150 over the entire circumference.

In this way, on the upper side Z2 of the processed paper W, the fine particles P accumulate around the protective cover 121 and over the entire circumference of the right end 150a of the upper inflow portion 150.
When the fine particles P are deposited in a certain amount, they fall due to their own weight. Among these, the deposit adhering to the lower side Z <b> 1 around the protective cover 121 and the outer periphery of the upper inflow portion 150 falls on the processed paper W. In this case, the processed paper W is soiled, and when laser processing or the like is performed in the next step, the fallen deposit is irradiated with laser light, which causes processing defects.

[Air flow in the space below the processed paper in the comparative example]
The cleaning device 110 of the comparative example does not include the lower outflow portion 70 as in the embodiment.
Therefore, the air in the lower smoke generating space A2 also has a lower flow rate than the cleaning device 10 of the embodiment, and the entire area of the lower smoke generating space A2 is directed to the left side X1 as in the upper smoke generating space A1. It is not a form that passes through.
Therefore, in the lower inflow portion 180, as in the upper inflow portion 150, the fine particles P accumulate on the right end 180 a.

Among these, deposits adhering to the lower side Z1 around the protective cover 121 and the outer periphery of the upper inflow portion 150 come into contact with the processed paper W and become dirty when the size becomes a certain size. Is a cause of processing defects, similar to the upper side Z2 of the processed paper W.
Thus, the cleaning device 110 according to the comparative example has a lower function of removing smoke than the cleaning device 10 according to the embodiment, and the processing paper W is likely to be stained.

  As described above, the cleaning device 10 of the present embodiment can reliably remove smoke generated by laser processing. Thereby, the quality of a product can be improved. In addition, since the number of cleaning operations by the operator during processing can be reduced, manufacturing efficiency can be improved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
In the following description and drawings, parts having the same functions as those of the first embodiment described above are denoted by the same reference numerals or the same reference numerals at the end (last two digits), and repeated descriptions are omitted as appropriate. To do.
FIG. 6 is a perspective view of a laser beam machine 201 according to the second embodiment.
The laser processing machine 201 includes an irradiation head 203 and a cleaning device 210.
The irradiation head 203 includes a galvano optical system. The irradiation head 203 performs laser processing on the processing paper W sent to the left side X1 while moving the irradiation destination of the laser beam 203a in the feeding direction X and the depth direction Y within the irradiation range 203b.
For this reason, the upper smoke generation space and the lower smoke generation space of the laser processing machine 201 are the space on the upper side Z2 and the space on the lower side Z1 of the irradiation range 203b.

The cleaning device 210 includes an upper cleaning device 220 and a lower cleaning device 260.
The upper cleaning device 220 includes an upper outflow portion 230 and an upper inflow portion 250.
The nozzle port 231 of the upper outflow portion 230 has a length in the depth direction Y that is larger than the irradiation range 203b.
Similarly, the nozzle port 251 of the upper inflow portion 250 has a length in the depth direction Y that is larger than the irradiation range 203b.
For this reason, when viewed from the upper side Z2, on the upper side Z2 of the processed paper W, the air flowing out from the upper outflow portion 230 moves in a manner having a depth in the depth direction Y and flows into the upper inflow portion 250 ( Arrow F201a-F201c). Therefore, the air that flows out from the upper outflow portion 230 passes through the entire area of the irradiation range 203b, that is, the entire area of the upper smoke generation space.
Thereby, on the upper side Z <b> 2 of the processed paper W, smoke generated by laser processing rides on this air and flows into the upper inflow portion 250 while passing through the upper smoke generation space.

Similar to the upper cleaning device 220, the lower cleaning device 260 includes a lower outflow portion 270 and a lower inflow portion 280.
Then, the lower cleaning device 260 flows smoke generated by laser processing on the lower side Z1 of the processing paper W into the lower inflow portion 280 in the same manner as the upper cleaning device 220 while passing through the lower smoke generation space.

  As described above, the cleaning device 210 of the present embodiment can reliably remove smoke generated by laser processing even in the laser processing machine 201 including the galvano optical system, as in the first embodiment. Thereby, the quality of a product can be improved and manufacturing efficiency can be improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made as in the modifications described later, and these are also included in the present invention. Within the technical scope. In addition, the effects described in the embodiments are merely a list of the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments. It should be noted that the above-described embodiment and modifications described later can be used in appropriate combination, but detailed description thereof is omitted.

(Deformation)
(1) In the present embodiment, the cleaning apparatus is illustrated with an example in which an outflow part is provided on the right side of the smoke generation space and an inflow part is provided on the left side, but the present invention is not limited thereto. Only one of these may be provided.
For example, you may make it the form which provided only the outflow part of embodiment with respect to the cleaning apparatus of a comparative example. Also in this case, as in the embodiment, since the air can be moved in the depth direction with respect to the smoke generation space, the effect of smoke cleaning can be expected.
For example, you may make it the form which provided only the inflow part of embodiment with respect to the cleaning apparatus of a comparative example. Also in this case, as in the embodiment, since the inflow port can be arranged so as to surround the smoke generation space and the lower side (or upper side) is opened, the effect of smoke cleaning can be expected.

(2) In this embodiment, although the example in which the inflow port was a shape opened long in the depth direction was described, it is not limited to this. For example, a plurality of small nozzle openings may be arranged in the depth direction. Also in this case, the air can be moved in a width manner in the depth direction. Moreover, if the size of the nozzle opening is adjusted, the moving speed and supply amount of air can be adjusted according to the position in the depth direction. For example, the air moving speed can be increased only in a space where the smoke concentration is high, or the air supply amount can be increased.

(3) In 1st Embodiment, although the inflow port demonstrated the example provided after the roller 2b (bending part), it is not limited to this. For example, the inlet may be provided only on the front side (upstream side X2) of the roller 2b.

DESCRIPTION OF SYMBOLS 1,201 Laser processing machine 10,210 Cleaning apparatus 21 Tube part 30,230 Upper outflow part 31,41,71,231,251 Nozzle port 40 In-cylinder outflow part 50,250 Upper inflow part 51,81 Upstream part 52,82 Downstream part 70,270 Lower outflow part 80,280 Lower inflow part A1 Upper smoke generation space A2 Lower smoke generation space A31 Moving space P Fine particles W Processing paper

Claims (4)

A laser processing smoke cleaning apparatus attached to a laser processing machine for processing a processed sheet in a feed direction and processing the processed sheet with laser light,
A cylindrical part that is attached to a laser irradiation part that emits laser light and passes the laser light;
It is integrally attached to the end portion of the cylindrical portion on the side close to the processed sheet, and air is directed in a direction along the feeding direction toward the space where smoke is generated by laser processing, and the width of the processed sheet An outflow portion that flows out in a direction having a depth in the direction, and outflows air to the space on the processing sheet side from the tip of the cylindrical portion;
An in-cylinder outflow part that is provided inside the cylinder part and outflows air;
From the space where smoke is generated by laser processing , air and smoke are flown in, and an inflow portion having a shape opening the processed sheet side of the cylinder arranged so that the axial direction becomes the flow direction,
A laser processing smoke cleaning device. The laser-processed smoke cleaning device according to claim 1,
The laser processing machine is to change the feed angle of the processed sheet at a bent portion,
The inflow part is
It is also arranged in the route of the processed sheet whose feed angle has changed at the bent portion,
The processed sheet side whose feed angle has changed at the bent portion is also open.
A laser processing smoke cleaning device. In the laser processing smoke cleaner according to claim 1 or 2,
The tip of the inflow portion is formed so as to surround a space where smoke is generated,
A laser processing smoke cleaning device. The laser processing smoke cleaning device according to any one of claims 1 to 3,
A laser irradiation unit that performs laser processing by irradiating the processing sheet with laser light ;
A laser processing apparatus comprising:

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