JPH09201551A - Jet nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To jet atomized fluid such as atomized coolant efficiently to a prescribed place. SOLUTION: Atomized coolant supplied through a mist supply pipe 110 is discharged outside from through holes 12e and spouted forward through a ring- shaped clearance 16. A taper shape part 14a is formed continuously from a inner cylinder part 14c in a tip member 14, the spouted atomized coolant (b) is converged along the peripheral surface 14d of the taper shape part 14a and jetted in a relatively thin beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a spray nozzle for spraying atomized fluid.

[0002]

2. Description of the Related Art In cutting, it is common to supply a cutting fluid (such as a coolant) to a processing point (cutting portion) for the purpose of improving machinability. As a means, there is a method of atomizing a cutting oil and injecting it into a processing point. That is, in FIG.
As shown in (b), the mist generating device 1 in which pressurized air is supplied through the air supply pipe 100 and the coolant is supplied from the coolant tank 102 through the pipe 104.
In accordance with 06, the coolant is sprayed from the spray nozzle 108 to a predetermined spray site as a mist state (mist).
(a) is a case where the mist generation device 106 is arranged near the injection site, and the mist generation device 106 has the mist generation device 106.
Directly attached to. (b) is the mist supply pipe 11
The injection nozzle 108 is connected to the mist generation device 106 via 0, and the position of the injection nozzle 108 can be freely set according to the injection site.

Here, as shown in FIG. 5, the injection nozzle 108 is usually in the form of a tapered taper cylinder whose diameter size decreases toward the tip, and the injection nozzle 108 injects. The atomized coolant diffuses as shown by the arrow. Note that FIG. 5 shows the case of FIG. 4 (b).

[0004]

By the way, since the cutting oil (coolant) is for cooling and lubricating the working portion of the tool tip, it is not necessary to spray it over a wide range.
The conventional injection nozzle has a problem that a large amount of cutting fluid is wasted and a large amount of floating mist is generated. Difficulty in efficiently injecting into a predetermined injection portion is the same in other injection nozzles such as a fuel injection device of an engine, a coating spray, and an insecticide spray.

The present invention has been made in view of the above circumstances, and an object thereof is to enable efficient injection of a mist-like fluid such as mist-like coolant to a predetermined injection part.

[0006]

In order to achieve such an object, a first invention is an injection nozzle for injecting a mist-like fluid, comprising (a) a pair of an outer member and an inner member provided concentrically. A nozzle body for ejecting the atomized fluid forward from a gap of a predetermined size between the outer member and the inner member, and (b) a guide surface having a predetermined shape that is substantially concentric with the nozzle body. Integrated with the nozzle body,
The guide member guides the atomized fluid ejected forward from the gap along the guide surface thereof.

A second aspect of the invention is the injection nozzle of the first aspect of the invention, wherein the guide surface of the guide member is a tapered outer peripheral surface having a diameter that decreases toward the front, and the guide member is integral with the inner member of the nozzle body. It is provided in.

A third aspect of the present invention is the injection nozzle of the first aspect of the present invention, wherein the guide surface of the guide member is a tapered inner peripheral surface whose diameter increases toward the front, and the guide member is an outer member of the nozzle body. It is characterized by being integrally provided.

[0009]

In such an injection nozzle, since the atomized fluid ejected forward from the gap of the nozzle body is guided along the guide surface of the guide member, the atomized fluid is ejected to the injection site to be ejected. Accordingly, by appropriately determining the guide surface of the guide member, the atomized fluid can be efficiently injected to the injection site. Thus, for example, when spraying the mist-like coolant to the processing point, the waste of the coolant is reduced and the floating mist is reduced while supplying a sufficient amount of the mist-like coolant to the processing point.

In the injection nozzle of the second aspect of the invention, the atomized fluid is converged along the tapered outer peripheral surface of which the diameter becomes smaller toward the front and is ejected in the form of a relatively thin beam. Therefore, for example, the atomized coolant is relatively small. It is suitable for use when concentrated injection is performed at the processing point. In this case, according to the experiments by the present inventors, the mist state of the mist-like coolant is maintained well, and the mist-like coolant remains in the deep hole drilling process with a depth of about 100 mm to 200 mm. The tool is fully supplied to the machining point at the tip of the tool, the tool breakage is reduced and the tool life is greatly improved.

In the injection nozzle of the third aspect of the invention, since the mist-like fluid is expanded into an annular shape along the tapered inner peripheral surface having a larger diameter toward the front, when the mist-like fluid is injected in the annular shape. It is preferably used.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Here, the injection nozzle of the present invention is
Suitable for injection nozzles that spray mist-like coolant (cutting oil) to the processing point in cutting, but also for other injection nozzles used in engine fuel injection devices, painting sprays, insecticide sprays, etc. it can. Also, the diameter of the nozzle, that is, the diameter of the annular gap is
It is appropriately determined according to the place of use. Also in the case of the spray nozzle used for spraying the mist-like coolant, the diameter dimension of the gap is appropriately set, and the spray nozzle may be compact, for example, about 10 mm.

If the gap between the outer member and the inner member of the nozzle body is too large, the flow of the atomized fluid is disturbed, which is not preferable, and the size of the gap does not disturb the flow of the atomized fluid. Is set according to the type and pressure of the atomized fluid. For example, when spraying atomized coolant in cutting, the pressure of atomized coolant is 3 kgf /
If it is about cm ² , the size of the gap is suitably about 0.3 mm or less, and if the pressure of the atomized fluid is about 7 kgf / cm ² , the size of the gap can be about 1 mm or less. However, if the size of the gap is about 0.3 mm or less,
It can be suitably applied to ordinary atomized coolant having a pressure of about 3 kgf / cm ² or more. The lower limit value of the gap may be at least a size that allows the atomized fluid to pass therethrough. In addition,
It is 1 kgf / cm ² ≈9.8 × 10 ⁴ Pa.

The taper angle of the taper outer peripheral surface in the second aspect of the invention is appropriately determined, but when spraying a mist-like coolant in the cutting process, about 10 ° to 30 ° is suitable. The tip of the outer peripheral surface of the taper does not necessarily have to be sharp, and a frustoconical shape or a rounded tip may be used.

In the injection nozzle according to the third aspect of the invention, it is desirable to dispose the second guide member having the tapered outer peripheral surface whose diameter becomes larger toward the front, on the inner member of the nozzle body. The axial length of the second guide member may be sufficiently shorter than the axial length of the guide member provided on the outer member, and the size of the gap between the second guide member and the guide member provided on the outer member. May be substantially the same as the gap between the outer member and the inner member. Also in the injection nozzle according to the second aspect of the present invention, it is possible to dispose the second guide member having a tapered cylindrical shape, the diameter of which decreases toward the front, on the outer member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The injection nozzle 10 of FIG. 1 is an example of the injection nozzle according to claims 1 and 2, and is for injecting an atomized coolant as an atomized fluid to a machining point of the cutting process, and ) Is attached to the mist supply pipe 110 and used. This injection nozzle 10
It is composed of a ring member 12 and a tip member 14, and is integrally mounted on one center line S which is the center line of the mist supply pipe 110.

The ring member 12 has a first male screw portion 12a provided at one end in the axial direction, a second male screw portion 12b provided at the opposite end, and a second male screw portion 12b at an intermediate portion in the axial direction. It is integrally provided coaxially with a bottomed cylindrical outer cylinder portion 12c provided parallel to the one center line S so as to project to the side, that is, the right direction in the figure, and the first male screw portion 12a is mist. Female screw 1 provided on the supply pipe 110
By being screwed into 10a, it is integrally attached to the mist supply pipe 110 on one center line S. The ring member 12 is also provided with a bottomed hole 12d from the end on the first male screw portion 12a side, and the shaft portion located inside the outer cylindrical portion 12c has the bottomed hole 12d and the outside. A plurality of through holes 12e are provided at equal angular intervals around one center line S so that the mist supply pipe 110
The mist-like coolant supplied to the injection nozzle 10 via the is discharged from the bottomed hole 12d to the outside through the plurality of through holes 12e.

The tip member 14 has a frustoconical taper portion 14a having a smaller diameter toward the front, which is the right direction in the figure, and a female screw 14b provided on the end portion on the large diameter side.
And a cylindrical inner cylindrical portion 14c provided parallel to the one center line S so as to project rearward on the outer peripheral portion of the large-diameter side end portion, coaxially and integrally, and the internal thread 14b is the second screw. By being screwed onto the male screw portion 12b, it is integrally attached to the ring member 12 on the one center line S. The outer diameter of the inner tubular portion 14c is smaller than the inner diameter of the outer tubular portion 12c,
Further, since the inner cylinder portion 14c and the outer cylinder portion 12c are arranged concentrically with respect to the one center line S, the annular gap 16 is formed between them in parallel with the one center line S. Further, in the attached state, the inner cylindrical portion 14c has a predetermined gap between the inner cylindrical portion 14c and the bottom portion of the outer cylindrical portion 12, and the through hole 12
While being located on the outer peripheral side of e, the boundary position between the inner tubular portion 14c and the tapered portion 14a is located further forward by a predetermined dimension than the front end of the outer tubular portion 12c, that is, on the right side in the drawing.

Here, the atomized coolant supplied to the injection nozzle 10 through the mist supply pipe 110 is an atomized water-soluble cutting fluid, the pressure of which is about 3 kgf / mm ² , and the annular gap 16 The gap dimension d is set to 0.3 mm or less. The taper angle of the tapered portion 14a is set within the range of 10 ° to 30 °, and the diameter of the annular gap 16 is about 10 mm. The inner tube portion 14
The clearance dimension between c and the bottom of the outer tubular portion 12 is equal to or greater than the clearance dimension d.

In such an injection nozzle 10, the mist-like coolant supplied through the mist supply pipe 110 is caused to flow out from the bottomed hole 12d through the plurality of through holes 12e to the outside cylinder portion 12c. It is ejected forward from the annular gap 16 between the inner cylindrical portion 14c. In that case, the atomized coolant flowing out from the through hole 12e bypasses the inner cylindrical portion 14c and flows into the annular gap 16, so that the atomized coolant is distributed substantially uniformly around the one center line S. Will be available. Further, since the tip end member 14 is provided with the tapered portion 14a continuously from the inner cylindrical portion 14c, the atomized coolant ejected forward from the annular gap 16 is indicated by an arrow in FIG. As shown, the light is focused along the outer peripheral surface 14d of the tapered portion 14a and is ejected in a relatively thin beam shape. Since the outside air is entrained when being focused along the outer peripheral surface 14d, the thrust of the atomized coolant is increased and the injection speed is increased. Of the ring member 12 and the tip member 14, the outer cylinder portion 12c and the inner cylinder portion 1
Reference numerals 4c correspond to an outer member and an inner member, respectively, and the nozzle main body is configured to include them, the tapered portion 14a of the tip member 14 corresponds to a guide member, and the outer peripheral surface 14d thereof corresponds to a guide surface. To do.

As described above, according to the injection nozzle 10 of the present embodiment, since the atomized coolant is ejected in the form of a relatively thin beam, the atomized coolant can be concentrated and efficiently supplied to a relatively small machining point. While supplying a sufficient amount of atomized coolant to the processing point, the waste of the coolant can be reduced and the floating mist is reduced to improve the working environment. According to experiments conducted by the present inventors, the mist state of the mist-like coolant is maintained well, and the depth is 100 mm to
Even in drilling with a deep hole of about 200 mm, the atomized coolant was sufficiently supplied to the processing point at the tip of the tool, the tool breakage was reduced and the tool life was greatly improved.

In the above embodiment, the tapered portion 14a of the tip member 14 has a truncated cone shape.
The tip of the tapered portion 20a may be sharp as in the tip member 20 shown in (a), or the tip of the tapered portion 22a may be spherical as in the tip member 22 shown in (b) of the figure. You can do it. Reference numerals 20a to 20d, 22 in these figures
Reference characters a to 22d correspond to the tapered portion 14a, the female screw 14b, the inner cylindrical portion 14c, and the outer peripheral surface 14d, respectively.

The injection nozzle 30 shown in FIG.
In the example of the injection nozzle described in (3), the tip portion 32a of the mist supply pipe 32 is closed, and the outer peripheral surface 32b of the tip portion 32a has a tapered shape whose diameter increases toward the front. The outer peripheral surface 32b is provided on the mist supply pipe 3
It is smoothly connected to the outer peripheral surface of the second main body portion, that is, the portion parallel to the one center line S. In addition, a plurality of through holes 32c are provided at equal angular intervals around the one center line S at a portion slightly before the tip portion 32a, and the atomized fluid supplied to the injection nozzle 30 through the mist supply pipe 32 is provided. Are allowed to flow out from the plurality of through holes 32c.

A guide member 34 is concentrically and integrally fixed to the outer peripheral side of the mist supply pipe 32 by a fixing means such as a screw. The guide member 34 includes a fixing portion 34a fixed to the outer peripheral surface of the mist supply pipe 32 behind the through hole 32c, that is, on the left side in the drawing, and the fixing portion 34a.
An outer cylindrical portion 34b extending forward from the outer peripheral portion of the same in parallel with the one center line S, and a tapered cylindrical shaped portion (clapper shape) 34c having a diameter increasing from the outer cylindrical portion 34b toward the front. It has and. Tapered tubular portion 34
The taper angle of c is substantially the same as the taper angle of the outer peripheral surface 32b of the tip portion 32a, and is provided substantially parallel to the outer peripheral surface 32b, but the tapered cylindrical portion 34c extends further forward than the tip portion 32a. I have put it out.

An annular gap 36 is formed between the outer cylindrical portion 34b and the mist supply pipe 32, and the atomized fluid flowing out from the through hole 32c is ejected forward from the annular gap 36. , Through the gap between the outer peripheral surface 32b of the tip portion 32a and the tapered tubular portion 34c, and is jetted while expanding along the inner peripheral surface 34d of the tapered tubular portion 34c as indicated by the arrow. When the air is expanded along the inner peripheral surface 34d, the outside air is entrained, so that the thrust of the atomized fluid increases and the injection speed increases. The gap size between the outer peripheral surface 32b of the tip portion 32a and the tapered cylindrical portion 34c is the annular gap 3
6 is approximately the same as the gap size, and when used as a spray nozzle for atomized coolant as in the above embodiment, the gap size is set to about 0.3 mm or less. The outer cylindrical portion 34b corresponds to an outer member, and a portion of the mist supply pipe 32 located inside the outer cylindrical portion 34b, that is, the through hole 3
The portion provided with 2c corresponds to the inner member, and the nozzle body is configured including them. The tapered cylindrical portion 34c corresponds to a guide member, and the inner peripheral surface 34d thereof corresponds to a guide surface. The tip portion 32a of the mist supply pipe 32 functions as a second guide member.

In such an injection nozzle 30, since the atomized fluid is expanded in an annular shape along the inner peripheral surface 34d of the tapered cylindrical portion 34c whose diameter increases toward the front, the atomized fluid is dispersed. It is preferably used in the case of injecting in an annular shape.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be embodied in other modes.

For example, the injection nozzle 10 is composed of a ring member 12 and a tip member 14 and is integrated by screw connection, but other integration means such as press fitting or welding can be used. . As the connecting means for connecting the ring member 12 to the mist supply pipe 110, means other than screw connection can be adopted.

As for the injection nozzle 30, the tip portion 32a
Was provided integrally with the mist supply pipe 32, but it may be provided separately and fixed by an integrated means such as screw connection. Other members may be divided into a plurality of parts as necessary.

When a plurality of members are integrated by screwing or the like, it is of course possible to prevent leakage of the atomized fluid by interposing a sealing member or the like as necessary.

In the above embodiment, the atomized fluid is introduced into the annular gaps 16 and 36 through the plurality of through holes 12e and 32c provided at right angles to the center line S. Fluid introduction for guiding the atomized fluid into the annular gap substantially evenly, for example, the atomized fluid can be introduced into the annular gap by a plurality of through holes provided around the center line S in parallel with the center line S. Means are appropriately determined.

Further, although the annular gaps 16 and 36 are provided in parallel with the one center line S, the outer cylindrical portion (outer member) and the inner cylindrical portion (inner member) are tapered to form a tapered cylindrical gap. It is also possible to provide. For example, the tapered cylindrical gap between the outer peripheral surface 32b of the tip portion 32a and the tapered cylindrical portion 34c in FIG. 3 can also be regarded as one form of the gap described in claim 1. The inner member does not necessarily have to be cylindrical, but may be solid cylindrical or the like.

Although not specifically exemplified, the present invention can be embodied with various modifications and improvements based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an injection nozzle that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another example of the tip member used in the injection nozzle of FIG.

FIG. 3 is a cross-sectional view of an injection nozzle that is another embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a mist-like coolant injection system including a conventional injection nozzle.

5 is a cross-sectional view of the injection nozzle used in FIG.

[Explanation of symbols]

 10: injection nozzle 12c: outer cylinder part (outer member) 14a, 20a, 22a: taper shape part (guide member) 14c, 20c, 22c: inner cylinder part (inner member) 14d, 20d, 22d: outer peripheral surface (guide surface) ) 16: annular gap (gap) 30: injection nozzle 32: mist supply pipe (inner member) 34b: outer cylinder part (outer member) 34c: tapered cylinder part (guide member) 34d: inner peripheral surface (guide surface) 36: annular gap (gap)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Sato 1-204 Kibune, Meito-ku, Nagoya, Aichi Prefecture

Claims (3)

[Claims] 1. A spray nozzle for spraying a mist-like fluid, comprising a pair of concentric outer and inner members, and the mist from a gap of a predetermined size between the outer and inner members. Of the atomized fluid ejected forward from the gap, the nozzle body ejecting the fluid-like fluid forward, and the nozzle body having a guide surface of a predetermined shape substantially concentric with the nozzle body And a guide member that guides the object along the guide surface. 2. The jet according to claim 1, wherein the guide surface of the guide member is a tapered outer peripheral surface having a diameter that decreases toward the front, and the guide member is integrally provided on an inner member of the nozzle body. nozzle. 3. The guide surface of the guide member is a tapered inner peripheral surface having a diameter increasing toward the front, and the guide member is provided integrally with an outer member of the nozzle body. Injection nozzle.