JP4884704B2 - Mist supply nozzle device - Google Patents

Description

  The present invention relates to a nozzle device that is used to supply mist air by spraying or discharging an object, and more specifically, in the nozzle device, mist air that has been transported with a particle size set to give priority to transportability. The present invention relates to a technology that can be supplied after being converted to a particle size that prioritizes adhesion when supplying to an object. In particular, the present invention relates to a nozzle device that is preferably used in semi-dry processing in which an oil agent having a fine particle size is supplied to a processing point by a minimum amount by air (for example, supply of several cc / H) during metal cutting.

  Conventionally, a flexible nozzle combined with a flexible hose and nozzle has been used to supply oil, coolant, or oil mist air (air containing mist-like oil) to the machining point of metal cutting. (For example, see Patent Document 1 as an example of supplying oil mist). For example, FIG. 5 illustrates a flexible nozzle 11 that is used when oil mist air is discharged by a minimum amount at a processing point P of metal cutting by semi-dry processing. This flexible nozzle 11 has a tip nozzle 13, which is one of the parts, joined to the tip of a flexible hose (also called a flexible tube) 12 having a product name of LOC-LINE (US LOCKWOOD PRODUCTS, INC. Trademark) MODULAR HOSE. This is what is called “Rock Line Nozzle” in Japan. In this flexible nozzle 11, the flexible hose 12 can be bent freely and can hold the bent shape. The magnet stand 14 connected to the base end portion of the flexible hose 12 can be appropriately positioned near the processing point. It can be temporarily fixed to the position, or can be directly fastened and fixed to the cutting machine using the connector 17 without using the magnet stand 14 although not shown. Then, oil mist air is transported from the oil mist generating device 15 through the transport hose 16 at a predetermined pressure, and the transported oil mist air is discharged from the tip nozzle 13 toward the processing point P through the flexible hose 21. It has become so.

  When the flexible nozzle 11 is further described with reference to FIG. 6, the flexible nozzle 11 is a flexible hose 12 in which a connector 17 and a predetermined number of connecting elements 121, 121,... The tip 17 is connected to the tip nozzle 13 via the flexible hose 12 from the connector 17 in a sealed state. Each of the connection elements 121 is formed from a spherical part 122 and an external fitting part 123 in a darling shape, and the spherical part of another connection element 121 adjacent to the external fitting part 123 of each connection element 121. It is externally fitted to 122 and can be freely bent in all directions of approximately 360 degrees. The connector 17 is screwed and fixed to one side of the connection hole 181 of the joint 18 fixed to the magnet stand 14, while the downstream end of the transport hose 16 is screwed and fixed to the other side of the connection hole 181. Thereby, said conveyance hose 16 and the flexible nozzle 11 are connected in a mutually connected state.

JP 2003-117768 A

  However, the conventional flexible nozzle 11 described above cannot optimize the oil particle diameter in the oil mist air discharged to the processing point P, and also when the supply of the oil mist air is stopped or started. The oil agent may drop from the tip nozzle 13 at the time of activation.

  That is, in the semi-dry process, the improvement of the oil mist transportability is targeted at the stage of transport from the oil mist generating device 15 to the tip nozzle 13 via the transport hose 16, while the tip nozzle 13 discharges to the processing point P. The target is to increase the adhesion of oil mist. In order to achieve such a goal, the oil mist is transported with a very fine particle size (for example, a particle size of 4 μm or less) in the transport stage, and the nozzle hole 131 of the tip nozzle 13 is made larger than the passage diameter so far. It is intended to increase the particle size of the oil mist by squeezing and increasing the discharge flow rate from the nozzle hole, and to increase the adhesion of the oil to the processing point P by increasing the particle size. In other words, as a measure for securing the adhesion of oil mist to the processing point, it is attempted to optimize the particle size by increasing the diameter.

  However, in the above-described conventionally used flexible nozzle 11, the particle size is not sufficiently optimized, and even if the particle size of 4 μm or less is conveyed from the oil mist generating device 15, In the supplied oil mist, the diameter has not been increased so much (for example, the diameter has been increased up to 8 μm). This is because the amount of oil mist transported is a minimum amount of several cc per hour, the flow rate is not so high, and the cross section of the passage in the flexible hose 12 is repeatedly enlarged and reduced. It is considered that the increase in diameter does not proceed as a result of the turbulent flow caused by the mist swirling as the mist swirls in the flexible hose 12, particularly in the spherical portion 122. If the oil mist having a fine particle diameter is supplied from the tip nozzle 13 without increasing the diameter, it may be diffused into the metal cutting work site (factory) and cause deterioration of the factory environment. It will be. In addition, it is considered that the oil agent having a large diameter adheres to the inner wall surface or the like of each connection element 121 due to the occurrence of the turbulent flow and accumulates, and this accumulated oil agent particularly when the oil mist air supply operation is stopped or The occurrence of inconvenience of dropping from the tip nozzle 13 at the time of starting again (when starting) is also conceivable.

  The present invention has been made in view of such circumstances, and the object of the present invention is to ensure the mist air transportability and to improve adhesion at the time of supply to the object, the mist particles. It is another object of the present invention to provide a mist supply nozzle device capable of sufficiently optimizing the diameter, and to prevent the occurrence of dripping of the mist-forming liquid when the mist supply operation is stopped or started.

To achieve the above object, according to the present invention, there is provided a mist supply nozzle device configured to supply mist air conveyed from an upstream side through a conveyance passage to an object by discharging the mist air from a nozzle hole of a tip nozzle. The following specific items were provided as targets. That is, a flexible hose configured to be bent by assembling two or more connecting elements that can be bent and slid with each other, and a funnel shape that is coupled to the tip of the flexible hose so that the inner diameter gradually decreases to the nozzle hole at the tip Alternatively, the tip nozzle formed in the shape of a triangular pyramid and the base is connected to the transport passage, and the flexibility is inserted into the flexible hose from the base end side to a position near the nozzle hole of the tip nozzle. A communicating tube having flexibility, and a position between the communicating tube and the nozzle hole, and located near the upstream side of the nozzle hole so as to face the internal space of the tip nozzle. A tip member coupled to the tip opening of the communication tube and having an orifice formed therein is provided. And as said orifice, the upstream part into which mist air flows in from a conveyance passage, the collision wall part which mist air collides in the direction where this upstream part extends, and cross | intersects from this collision part to the said upstream part the Misutoea after colliding with the collision wall portion extends in a direction e Bei a downstream portion leading to the nozzle hole, the inner diameter of the upstream portion and a downstream portion of the orifice passage cross sectional area from the communicating tube The diameter is set to be smaller than the inner diameter of the communication tube so as to decrease rapidly (Claim 1).

In the case of the present invention, when the mist air flows into the upstream side portion of the orifice from the conveyance passage, the passage cross-sectional area rapidly decreases, so that the flow velocity is increased, and the increased mist air collides with the collision wall portion. Become. The particle size of the mist constituting the mist air is increased by the energy at the time of the acceleration and the collision. The larger diameter has been Misutoea is released in the inner space of the tip nozzle through the downstream portion of the orifice, which is accelerated by guided passes through the tip nozzle to Bruno nozzle hole of the tip, the object from the nozzle hole It will be discharged to the object. For this reason, in order to improve the transportability of the transport by the transport path, even if a mist having a fine diameter is generated as a mist particle size, the mist is increased in diameter and increased in adhesion to the object. It becomes possible to discharge and supply. That, ing to be obtained by optimizing the particle size of the Misutoea discharge-supplying to the object. At this time, it is possible to obtain the ease of flexible arrangement based on the flexible hose.

In the above invention, a seal member that seals a gap between the communication tube and the flexible hose is further provided, and the base of the flexible hose is closed with the gap between the flexible hose and the communication tube closed by the seal member. It is good also as a structure which connects an end to the downstream end of the said conveyance path (Claim 2 ). By doing so, it becomes possible to discharge and supply all of the mist air conveyed by the conveyance path to the object through the communication tube and the orifice, while the mist air enters the flexible hose by the seal member. It is possible to prevent the occurrence of dripping or dripping from the nozzle hole without fail.

As described above, according to the mist supply nozzle device of the present invention, even if a mist having a fine diameter is generated as the particle diameter of the mist and is conveyed through the conveyance path in order to improve the conveyance property, the orifice from the communication tube and accelerating the Misutoea velocity by flowing into the upstream portion of, Ki de is possible to reliably and effectively increased diameter particle size of the mist by the energy at the time of collision through the upstream portion to the impact wall section in addition to accelerating in the nozzle hole, it can be discharged and supply Misutoea state with increased adhesion and increased diameter relative to the object from Bruno nozzle hole. That, ing to be able to discharge and supply the objects in terms of optimizing the particle size of the Misutoea. At this time, it is possible to obtain the ease of flexible arrangement based on the flexible hose.

According to 請 Motomeko 2, all Misutoea conveyed by the conveying path can be discharged and supply to the object through the communicating tube and the orifice, from the nozzle hole caused by Misutoea from entering the flexible hose It becomes possible to reliably prevent the occurrence of lid drop.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a nozzle device according to an embodiment of the present invention. This nozzle device utilizes the components of a flexible nozzle that has been used in the past, while maintaining flexibility, and sufficiently optimizing the particle size of the oil mist, as well as the oil agent from the nozzle hole at the tip. This makes it possible to surely avoid the occurrence of dripping. Such a nozzle device is a semi-dry process in which oil mist generated by an oil mist generator (see FIG. 5) is transported as oil mist air to a metal cutting processing point and then discharged from the nozzle hole at the tip to the processing point. It is applied to a mist supply device that forms part of the system.

  In the figure, 2 is a communication tube, 3 is a tip member, 4 is a tube guide, 5 is a seal piece, and 61, 62 and 63 are O-rings. In addition, about the component already demonstrated in the background technical column using FIG. 5 or FIG. 6, in the following description, the same code | symbol as described in FIG. 5 or FIG. Omitted.

  First, as a supplementary explanation, the tip nozzle 13 is formed in a funnel-like or triangular pyramid-like cylindrical shape whose inner diameter gradually decreases to the nozzle hole 131 having a small diameter at the tip, and the inner peripheral surface on the base end side. Further, an outer fitting portion 132 similar to the outer fitting portion 123 of the connection element 121 is formed. The outer fitting portion 132 is fitted to the spherical portion 122 of the connecting element 121 located at the tip of the flexible hose 12 so as to be freely bent. Further, the external fitting portion 123 of the connection element 121 located at the proximal end of the flexible hose 12 is externally fitted to the distal end portion of the connector 17 so as to be bent in the same manner as described above. As described above, the connector 17, the flexible hose 12 and the tip nozzle 13 can be bent in a state where the space from the connector 17 side to the nozzle hole 131 is sealed.

  The communication tube 2 is formed of a resin tube so as to have flexibility and flexibility, and is inserted into the connector 17 and the flexible hose 12. The distal end member 3 is coupled to the distal end opening 21 (see FIG. 2 or 3) of the communication tube 2, and the tube guide 4 is coupled to the distal end member 3. The distal end member 3 and the tube The guide 4 is disposed so as to face the internal space of the tip nozzle 13, that is, to be positioned in the vicinity of the upstream side of the nozzle hole 131. On the other hand, the base end opening 22 (see FIG. 1) of the communication tube 2 is disposed facing the connecting hole 181 in the joint 18 and communicates with the downstream opening end of the transport hose 16 through the connecting hole 181. .

  As shown in detail in FIGS. 2 (a) and 3, the distal end member 3 is formed with coupling portions 32 and 33 on the proximal end side and the distal end side of a rod-shaped main body 31, respectively, and an orifice hole 34 in the main body 31. And the discharge holes 35, 35 are formed through. The proximal end side coupling portion 32 serves to couple the distal end member 3 to the communication tube 2 by being fitted into the distal end opening 21 of the communication tube 21 in a press-fit manner, and the distal end side coupling portion 33 serves as the tube guide 4. The tube guide 4 is joined to the tip member 3 by being fitted into the connecting hole 41 in a press-fit manner. The retaining function may be realized by the frictional force due to the above-described internal fitting, and the locking claws 321 and 331 (illustrated only in FIG. 3) protruding from the outer peripheral surfaces of the coupling portions 32 and 33 are internally fitted. A retaining function may be secured by biting into the inner wall of the subject.

  The orifice hole 34 opens at the base end surface of the main body 31, extends through the main body 31 to a predetermined back position in the direction of the axis X coaxial with the communication tube 2, and then communicates with the back end 341. The discharge holes 35 and 35 are bent and extended in the direction of the axis Y intersecting the axis X (radial direction orthogonal to the axis X in the illustrated example), and the outlets thereof are opened at the outer peripheral surface position of the main body 31, respectively. Has been. The inner diameters of the orifice hole 34 and the discharge holes 35, 35 are set to be smaller than the inner diameter of the communication tube 2 by a predetermined amount so that the passage cross-sectional area is sharply reduced. The orifice hole 34 and the discharge holes 35, 35 constitute an orifice of the present invention, of which the orifice hole 34 constitutes an upstream portion, each discharge hole 35 constitutes a downstream portion, and the back end. 341 constitutes the collision wall portion of the present invention.

  The tube guide 4 has a plurality of (three in the illustrated example) blade portions 43, 43, 43 projecting in a radial direction from a central portion 42 where the connecting hole 41 is formed. The tip of each blade 43 is loosely brought into contact with the inner peripheral surface of the tip nozzle 13 so that the tip member 3 including the communication tube 2 and particularly the tip member 3 is positioned on the central axis of the tip nozzle 13. It has become. As a result, the distal end member 3 and the communication tube 2 can be relatively moved in the axial direction within the flexible hose 12 while the discharge holes 35 are reliably opened.

  On the other hand, the proximal end side of the communication tube 2 is inserted into the connector 17 as shown in FIG. 4, and the cylindrical seal piece 5 is interposed between the outer peripheral surface of the communication tube 2 and the inner peripheral surface of the connector 17. The position is fixed to the connector 17 by fitting. An O-ring 61 is interposed between the seal piece 5 and the connector 17, an O-ring 62 is interposed between the seal piece 5 and the communication tube 2, and an O-ring is interposed between the communication tube 2 and the connector 17. The ring 63 is interposed, and all of the oil mist air conveyed from the conveyance hose 16 (see FIG. 1 or FIG. 5) flows into the communication tube 2 from the proximal end opening 22 through the connection hole 181 and is thus on the distal end side. It flows into the orifice hole 34.

  In the case of the above embodiment, the oil mist air transported from the oil mist generating device 15 (see FIG. 5) through the transport hose 16 to the connection hole of the joint 18 has a seal piece 5 between the connector 17 and the communication tube 2. And since it is completely sealed by the O-rings 61, 62, 63, it flows into the communication tube 2 from the base end opening 22 as described above. That is, all of the oil mist air that has been conveyed can flow into the communication tube 2, and the flow of the oil mist air is completely excluded from being affected by the inner surface shape of each connecting element 121 of the flexible hose 12. Can do. As a result, when the oil mist air supply operation is stopped or restarted, the occurrence of a situation in which the oil agent accumulated in the flexible hose 12 drops or drips from the nozzle hole 131, It can be surely prevented.

  The oil mist air that has been transported to the distal end side of the communication tube 2 is rapidly reduced in the cross-sectional area of the passage in the orifice hole 34, so that the flow velocity is increased and the rear end 341 in a state in which the flow velocity is increased. , The particle diameter of the oil agent in a mist state in the oil mist air can be increased. Oil mist air is discharged into the internal space of the tip nozzle 13 through the discharge holes 35 in a state where the diameter of the oil agent is increased, and is discharged from the nozzle hole 131 toward the processing point P (see FIG. 5). . Since the particle diameter of the oil agent in the discharged oil mist air is increased by the increase in the flow velocity and the collision energy, the particle size of the oil agent is affected by the turbulent flow and compared with the case where only the acceleration at the nozzle hole 131 is performed. Further, it is possible to increase the diameter (for example, increase the diameter of the oil agent having been conveyed with a particle diameter of 4 μm to a particle diameter of 10 to 15 μm). As a result, even if the oil mist is formed so that the oil agent has a fine particle size (for example, 4 μm or less) in order to improve the transportability of oil mist air from the oil mist generating device 15, The particle size of the oil agent can be increased at the position, and the particle size that can further improve the adhesion to the processing point P can be optimized.

  In addition, although the base end side of the communication tube 2 is fixed by the connector 17, the distal end side is relatively movable in the axial direction within the flexible hose 12, so that the flexible hose 12 is freely bent and the tip nozzle 13 is freely bent. The function of adjusting the position so that the direction of the head is accurately directed to the processing point P can also be obtained in the same manner as in the prior art.

  In addition, although the oil mist air that has exited from each discharge hole 35 passes through the tip nozzle 13 and is discharged from the nozzle hole 131, a part of the oil mist air is flexible when it exits from each of the discharge holes 35. Although there is a possibility of flowing into the gap between the hose 12 and the communication tube 2, the gap is kept in a sealed state by the seal piece 5. All of the oil mist air that has come out is discharged from the nozzle hole 131.

<Other embodiments>
In addition, this invention is not limited to the said embodiment, Various other embodiments are included. That is, in the above-described embodiment, the case where the supply target is oil mist has been described. However, the present invention is not limited thereto, and other mist, for example, a coolant such as a coolant or a synthetic lubricant other than oil is made mist and the mist air is supplied. The present invention may be applied when supplying the object to the object, and includes such mist air.

  In the present embodiment, two discharge holes 35 are formed to guide oil mist air after colliding with the back end 341 of the orifice hole 34 to the nozzle hole 131. However, the present invention is not limited to this, and one or three or more discharge holes 35 are formed. Further, the direction leading to the nozzle hole 131 after the collision is not limited to the radial direction as in the present embodiment, but may be guided obliquely to the nozzle hole 131.

  Furthermore, in the said embodiment, although the combination of the seal piece 5 and O-ring 61, 62, 63 was shown as a sealing member, it is not restricted to this, For example, an O-ring is abbreviate | omitted and a single sealing member is press-fit. The sealing member may be configured by only an O-ring or the like by omitting the sealing piece.

It is a section explanatory view showing an embodiment of the present invention. It is an enlarged view which shows a communication hose, a front-end | tip part, and a tube guide, FIG. 2 (a) is the elements on larger scale of FIG. 1, FIG.2 (b) is the arrow line view seen from the AA line of FIG. It is. It is a disassembled perspective view of the tip member and tube guide in the state where the communication tube was made to protrude from the tip side of the flexible hose with the tip nozzle removed. It is the elements on larger scale of FIG. 1 in the base end side of a communicating tube, and the part of a connector. It is explanatory drawing which shows the example of application of embodiment and the conventional nozzle apparatus. It is a figure corresponding to FIG. 1 which shows the example of the conventional nozzle device.

Explanation of symbols

2 Communication tube (conveyance path)
3 Tip member 4 Tube guide 5 Seal piece (seal member)
12 Flexible hose 13 Tip nozzle 16 Transport hose (transport passage)
17 Connector (base end of flexible hose)
34 Orifice hole (upstream part of the orifice)
35 Discharge hole (downstream part of orifice)
61, 62, 63 O-ring (seal member)
121 Connection element 131 Nozzle hole 341 Deep end of the orifice hole (collision wall)
P Machining point (object)

Claims (2)

A mist supply nozzle device configured to supply mist air conveyed from an upstream side through a conveyance path to an object by discharging the mist air from a nozzle hole of a tip nozzle,
A flexible hose configured to bendable by assembling two or more connecting elements that can be bent and slid with each other, and a funnel shape coupled to the tip of the flexible hose so that the inner diameter gradually decreases to the nozzle hole at the tip. a tip nozzle formed in a triangular pyramid-shaped cylindrical base end is communicated with the conveying passage, flexibility and inserted from the base end side up Symbol the flexible hose to a position near the nozzle hole of the tip nozzle A communicating tube having flexibility, and a position between the communicating tube and the nozzle hole, and located near the upstream side of the nozzle hole so as to face the inner space of the tip nozzle. A tip member coupled to the tip opening of the communication tube and having an orifice formed therein ,
The orifice intersects the upstream part into which the mist air flows from the transport passage, the collision wall part where the mist air collides in the direction in which the upstream part extends, and the upstream part from the collision part. And a downstream portion that guides the mist air that has collided with the collision wall portion to the nozzle hole, and the inner diameter of the upstream portion and the downstream portion of the orifice is abruptly changed in cross-sectional area from the communication tube. The diameter is set smaller than the inner diameter of the communication tube so as to reduce,
A mist supply nozzle device. The mist supply nozzle device according to claim 1 ,
A seal member for sealing a gap between the communication tube and the flexible hose;
A mist supply nozzle configured such that a base end of the flexible hose is connected to a downstream end of the transport passage in a state where a gap between the flexible hose and the communication tube is closed by the seal member. apparatus.

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