Dust removal device

Abstract

To provide a dust collector which can effectively suppress powder dust from scattering.SOLUTION: A dust collector 1 is arranged opposing to a surface H to be processed of a work-piece. The dust collector 1 comprises: a first jetting chamber 7 provided with a first jetting port 7a that jets airflows S and T toward the work-piece W; a suction chamber 9 provided with a suction port 9a in which the first jetting port 7a is positioned and which is arranged outside the port, and suctions powder dust adhering onto the surface H to be processed or floating powder dust together with the airflows S and T; and a second jetting chamber 11 provided with a second jetting port 11a in which the suction port 9a is positioned and which is arranged outside the port, and jets an airflow V toward the work-piece W to inhibit the airflows S and T jetted from the first jetting port 7a from moving to the outside of the suction port 9a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dust removal device. [Background technology]

[0002] Conventionally, to remove dust particles adhering to the surface of a workpiece, compressed air is sprayed from a round or slit-shaped opening located a few millimeters to a few tens of millimeters away from the workpiece to blow away the dust particles, and the scattered dust particles are then collected by a duct or the like inside a hood.

[0003] In order to efficiently remove the dust blown away by the compressed air, it is conceivable to provide a suction port for collecting the dust near the periphery of the compressed air injection port. Patent Document 1 discloses a dust removal head in which two suction chambers adjacent to both sides of the injection chamber are integrally constructed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4191439 Summary of the Invention [Problem to be solved by the invention]

[0005] In the dust removal head disclosed in Patent Document 1, when dust particles blown by compressed air fly at high speeds, the suction port adjacent to the injection port may not be able to capture all of the dust particles. Also, when the suction airflow rate is increased to capture dust particles flying at high speeds, the suction resistance of the air suction path increases, resulting in a limit to the dust scattering suppression effect.

[0006] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to effectively suppress scattering of dust particles in a dust removal device. [Means for solving the problem]

[0007] One aspect of the present invention is a dust removal device disposed opposite a surface of a workpiece to be treated. The dust removal device includes a first injection chamber, a suction chamber, and a second injection chamber. The first injection chamber is provided with a first injection port that injects an airflow toward the workpiece. The suction chamber is disposed outside the first injection port and has a suction port that sucks in dust particles adhering to or floating on the surface to be treated together with the airflow. The second injection chamber is disposed outside the second injection chamber and has a suction port that injects an airflow toward the workpiece and prevents the airflow injected from the first injection port from moving outward from the suction port. The dust removal device is located within the first injection chamber and has an inner tube that opens toward the first injection port, and an air flow passing through the inner tube and an air flow passing between the first injection chamber and the inner tube are injected from the first injection port toward the workpiece. An air flow is sprayed toward the workpiece from the first nozzle, and dust particles adhering to the surface to be treated or floating dust particles are sucked in together with the air flow by the suction port on the outside, and an air flow is further sprayed toward the workpiece from the second nozzle on the outside, so that dust particles can be sucked in while preventing them from leaking to the outside. In addition, the air flow passing through the inner tube and the air flow passing between the first injection chamber and the inner tube are injected toward the workpiece, thereby preventing dust particles from flowing back into the first injection chamber.

[0009] In one aspect of the present invention, the first injection port may be formed as a circular hole in the end face of the wall portion in which the injection port is formed, and the suction port and the second injection port may be formed as an annular slit in the end face surrounding the first injection port. The first injection port is formed as a circular hole, and the suction port and the second injection port are formed as an annular slit surrounding the first injection port, so that dust particles can be effectively sucked in.

[0010] In one aspect of the present invention, the second injection port is provided with a flow straightening portion that straightens the airflow. The second injection port is provided with a flow straightening section for straightening the air flow, so that the air flow can be straightened and the outflow of dust particles to the outside can be effectively prevented.

[0011] In one aspect of the present invention, the airflow straightening section is an annular slit that jets airflow perpendicularly toward the workpiece. The airflow straightening section is formed as an annular slit that jets the airflow perpendicular to the workpiece, so that a suitable airflow can be generated.

[0012] In one aspect of the present invention, the second injection chamber constitutes a buffer tank that supplies air flow to the second injection port. The second injection chamber functions as a buffer tank that supplies air flow to the second injection port, thereby generating a stable air flow.

[0013] In one aspect of the present invention, the suction chamber is formed as an annular space with the wall portion forming the ejection chamber positioned therein, and is connected to a negative pressure source through a pipe connected tangentially thereto so as to generate a spiral flow within the suction chamber. A spiral flow is generated in the suction chamber, so dust can be sucked in efficiently.

[0014] In one aspect of the present invention, the second injection chamber is supplied with air containing ions generated by an ionizer. Since air containing ions is supplied to the second injection chamber, the surface of the workpiece is neutralized and dust particles can be effectively removed.

[0015] In one aspect of the present invention, a laser light source is provided that passes laser light through a first injection chamber to perform laser processing on a workpiece. Since a laser light source is provided that emits laser light through the first injection chamber, dust particles generated during processing can be removed while the workpiece is being laser processed.

[0016] In one aspect of the present invention, a nozzle for spraying a blasting medium for blasting a workpiece is inserted into the first spray chamber. Since the blast material is supplied to the first injection chamber, the dust generated during the blast treatment can be removed while the workpiece is being blasted. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a dust removal device that effectively suppresses scattering of dust particles. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view of a dust removal device according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional perspective view of a dust removal device according to an embodiment of the present invention. [Figure 3] 1 is a transparent perspective view of a dust removal device according to an embodiment of the present invention. [Figure 4] 1 is a cross-sectional perspective view of a dust removal device according to an embodiment of the present invention. [Figure 5] 1 is a cross-sectional perspective view of a dust removal device according to an embodiment of the present invention. [Figure 6] 1 is a cross-sectional view of a dust removal device according to an embodiment of the present invention. [Figure 7] 1 is a cross-sectional view of a dust removal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (First embodiment) This embodiment relates to a dust removal device that removes dust particles generated on the surface of a workpiece during various processes. FIG. 1 is a cross-sectional view of a dust removal apparatus 1 according to this embodiment. FIGS. 2 and 4 are cross-sectional perspective views of the dust removal apparatus 1, with FIG. 2 being a view of the dust removal apparatus 1 as seen from above and FIG. 4 being a view of the dust removal apparatus 1 as seen from below. FIG. 3 is a see-through perspective view of the dust removal apparatus 1. The dust removal apparatus 1 is disposed opposite the surface H of the workpiece to be treated, and sucks up dust particles adhering to the workpiece or floating in the vicinity of the workpiece. Here, "treatment" refers to other treatments such as blowing off dust particles from the workpiece surface with an airflow, processing the workpiece with a laser beam as described below, or polishing the workpiece surface with a blasting material. The main body 3 of the dust removal device 1 is provided with: a first injection chamber 7 having a first injection port 7a that injects an air flow toward the workpiece W; a suction chamber 9 that is arranged outside the first injection port 7a with the first injection port 7a located inside and is provided with a suction port 9a that sucks in dust particles adhering to the surface to be treated or floating dust particles together with the air flow; and a second injection chamber 11 that is arranged outside the first injection chamber 7a with the suction port 9a located inside and is provided with a second injection port 11a that injects an air flow toward the workpiece and prevents the air flow injected from the first injection port 7a from moving outward from the suction port 9a.

[0020] The dust remover 1 is further provided with an inner pipe 13 that is located within the first injection chamber 7 and opens toward the first injection port 7a. As shown in Fig. 1, an air flow (arrow S) that is supplied to the inlet 41 of the inner pipe 13 and passes through the inner pipe 13, and an air flow (arrow T) that is supplied to the first inlet 35 of the first injection chamber and passes between the first injection chamber 7 and the inner pipe 13 are injected from the first injection port 7a toward the workpiece W.

[0021] As shown in FIG. 4, the first jet nozzle 7a is formed as a circular hole in the end face 5 of the wall portion where the jet nozzle 7a is formed (the surface where the first jet nozzle 7a and the suction port 9a are formed). The jet nozzle 13a of the inner tube 13 opens to face the first jet nozzle 7a. The jet nozzle 13a of the inner tube 13 is formed as a cone with a gradually tapered tip, with the tip cut off. The shape of the inner tube 13, including the jet nozzle 13a, is not limited to the above-described shape and may be variously modified. The suction port 9a and the second jet nozzle 11a are formed as an annular slit surrounding the first jet nozzle 7a in the end face 5. The second jet nozzle 11a is provided with a rectifying section 15 that rectifies the airflow. In this embodiment, the rectifying section 15 is an annular slit 15a that orthogonally injects airflow (arrow V shown in FIG. 1) toward the workpiece W. This annular slit 15a has the same width from the top end to the bottom end in the drawing.

[0022] As shown in FIG. 3, an air flow is supplied to the second injection chamber 11 from a second inlet 39. In this embodiment, the air flow is supplied from two second inlets 39, and the second injection chamber 11 is formed as a doughnut-shaped space within the device body 3 and constitutes a buffer tank that supplies the air flow to the annular slit 15a. As shown in FIG. 1, the suction chamber 9 has a negative pressure source or the like (not shown) connected to the exhaust port 37, generates an air flow U, and sucks the air flow onto the surface of the workpiece W sprayed from the first injection port 7a and the second injection port 11a through the suction port 9a. As shown in FIG. 3, in this embodiment, four exhaust ports 37 are provided.

[0023] As shown in FIG. 3, the dust removal device 1 is started with the end surface 5 of the device body 3 positioned opposite the surface H to be treated of the workpiece W. The gap between the end surface 5 and the workpiece W may be on the order of a few millimeters, preferably 2 mm or less. As shown in FIG. 1, an air flow T from the first injection nozzle 7a via the first injection chamber 7 and an air flow S from the injection nozzle 13a of the inner tube 13 via the inner tube 13 are injected toward the workpiece W so as to blow away dust particles on the workpiece W. The air flow T is an air flow that passes through the gap between the inner tube 13 arranged in the first injection chamber 7 and the first injection chamber 7.

[0024] As shown in Figure 4, a suction port 9a is formed around the first nozzle 7a as an annular slit surrounding the first nozzle 7a. A second nozzle 11a is formed around the suction port 9a as an annular slit surrounding the suction port 9a. The second nozzle 11a is provided with a flow straightening section 15. This flow straightening section 15 is a slit 15a with a uniform width from top to bottom. The air passing through this section is straightened in one direction, and the air injected from the lower opening toward the workpiece forms an air curtain, effectively preventing dust from scattering outward. As shown in Figure 3, the air flow supplied from the second inlet 39 passes through the second injection chamber 11, which functions as a buffer tank, and is injected toward the workpiece W as air flow V (Figure 1) from the second nozzle 11a.

[0025] The air flows S and T shown in FIG. 1 that are sprayed from the first nozzle 7a, the dust particles adhering to the workpiece W that is blown away by this air flow, or the floating dust particles, and the air flow V that is sprayed from the second nozzle 11a are sucked through the annular suction port 9a formed between the first nozzle 7a and the second nozzle 11a, and are discharged from the exhaust port 37 as the air flow U shown in FIG. 1 that passes through the suction chamber 9.

[0026] As described above, the dust removal device 1 in this embodiment blows away dust particles on the workpiece W with the air flows S and T injected from the first injection nozzle 7a onto the workpiece W and sucks them out through the suction port 9a. The second injection nozzles 11a are provided in a ring shape around the suction port 9a and inject the air flow V toward the workpiece W, so that the air flow V formed in a ring shape like an air curtain can effectively prevent the dust particles blown off the workpiece W from leaking outside the device.

[0027] From the first injection port 7a, the air flow S from the inner tube 13 and the air flow T passing between the inner tube 13 and the first injection chamber 7 are injected toward the workpiece W, so the air flow T prevents dust from returning to the first injection port 7a, enabling efficient dust removal. The suction port 9a is formed in a ring shape surrounding the first injection port 7a, so that the dust blown away by the air flows S and T can be reliably sucked in. A second injection port 11a is formed in a ring shape around the suction port 7a and injects an air flow V toward the workpiece W. Therefore, even if the suction force from the suction port 9a is increased to strengthen the suction of dust, the workpiece W is prevented from sticking to the suction port 9a, and the workpiece W can be prevented from floating up.

[0028] The second injection nozzle 11a is provided with a rectifying section 15, which aligns the vector of the airflow from the second injection nozzle 11a to obtain the desired airflow that prevents dust from scattering. The second injection chamber functions as a buffer tank, so even if airflow is supplied from a small number of second suction ports 39 as in this embodiment, the pressure of the airflow V from the second injection nozzle 11a can be uniformly injected regardless of position. Thus, it is possible to provide a dust removal device 1 that effectively suppresses leakage of dust outside the device and prevents workpieces from being sucked in by suction.

[0029] (Variation) In this modified example, as shown in Fig. 3, air containing ions generated by an ionizer 27 is supplied to the second injection chamber 11. Other parts have the same configuration as the other embodiments, and this modified example can be applied to the previously described and later described embodiments. In this modified example, in addition to the effects of each of the previous embodiments, air containing ions is injected from the second injection port 11a toward the workpiece W, which neutralizes the workpiece W and efficiently removes dust particles adhering to the workpiece W due to static electricity.

[0030] (Second embodiment) FIG. 5 shows a dust removal device 10 according to this embodiment. This embodiment differs from the first embodiment described above in the portion of the exhaust port 37 shown in FIG. 3 that is provided in the suction chamber 9 in the first embodiment. In this embodiment, the suction chamber 9 is formed as an annular space 9b with the wall portion 17 that forms the injection chamber 7 positioned therein, and is connected to a negative pressure source 21 via a pipe 19 connected tangentially thereto so as to generate a spiral flow in the suction chamber 9. The other configurations are the same as those of the first embodiment, and in addition to the effects of the first embodiment, the spiral flow generated in the suction chamber 9 can efficiently suck dust from the workpiece W.

[0031] (Third embodiment) 6 shows the dust removal device 20 of this embodiment. The dust removal device 20 of this embodiment includes a laser light source 33 that passes laser light through the inner tube 13 in the first injection chamber 7 to laser process the workpiece W. In this embodiment, due to the effects of the other embodiments, dust particles generated by laser processing can be efficiently removed when laser processing the workpiece W.

[0032] (Fourth embodiment) 7 shows the dust removal device 30 of this embodiment. In the dust removal device 30 of this embodiment, a nozzle 43 that sprays blasting medium b for blasting the workpiece W is inserted into the inner pipe 13 in the first spray chamber 7. In this embodiment, due to the effects of the other embodiments, when blasting the workpiece W, dust generated by blasting can be efficiently removed. [Explanation of symbols]

[0033] 1, 10, 20, 30 Dust removal equipment 5 End face 7 First injection chamber 7a First nozzle 9 Suction chamber 9a Suction port 9b Annular Space 11 Second injection chamber 11a Second nozzle 13 Inner tube 15 Rectifier 15a Circular slit 17 Wall 19 Conduit 21 Negative pressure source 23 Ionizer 33 Laser light source 43 Nozzle for spraying blasting media double work b. Blasting media S, T, U, V airflow H Workpiece surface to be treated

Claims

1. A dust removal device disposed opposite to the surface to be treated of the workpiece, The dust removal device is a first injection chamber provided with a first injection port that injects an airflow toward the workpiece to blow away dust adhering to the workpiece; a suction chamber having a suction port disposed outside the first injection port and configured to suck in dust particles adhering to the surface to be treated or floating dust particles together with the airflow; a second injection chamber provided with a second injection port disposed outside the suction port with the suction port positioned therein and configured to inject an air flow toward the workpiece and prevent the air flow injected from the first injection port from moving outward from the suction port; The dust removal device is provided with an inner tube that is located within the first injection chamber and opens toward the first injection port, and an air flow that passes through the inner tube and an air flow that passes between the first injection chamber and the inner tube are injected from the first injection port toward the workpiece.

2. 2. The dust removal device according to claim 1, wherein the first injection port is formed as a circular hole in the end surface of the wall portion in which the injection port is formed, and the suction port and the second injection port are formed as annular slits in the end surface surrounding the first injection port.

3. The dust remover according to claim 1 or 2, wherein the second injection port is provided with a flow straightening portion for straightening the air flow.

4. The dust remover according to claim 3 , wherein the airflow straightening section is an annular slit that jets the airflow perpendicularly toward the workpiece.

5. The dust remover according to claim 1 , wherein the second injection chamber constitutes a buffer tank that supplies an air flow to the second injection port.

6. 6. The dust removal device according to claim 2, wherein the suction chamber is formed as an annular space with the wall portion forming the injection chamber positioned therein, and is connected to a negative pressure source through a pipe connected tangentially thereto so as to generate a spiral flow within the suction chamber.

7. The dust remover according to claim 1 , wherein the second injection chamber is supplied with air containing ions generated by an ionizer.

8. The dust remover according to claim 1 , further comprising a laser light source that passes a laser beam through the first injection chamber to perform laser processing on the workpiece.

9. The dust removal device according to claim 1 , wherein a nozzle for spraying a blasting medium for blasting the workpiece is inserted into the first spray chamber.

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