JP2020081928A - Method of manufacturing injection nozzle - Google Patents

Abstract

To eliminate the necessity for a skill of a skilled worker in forming in a spray nozzle a spray port for spraying water which is spread in a fan-like fashion, at a predetermined spray angle.SOLUTION: A manufacturing method for a spray nozzle 1A comprising a spray port 100a for spraying water which is spread in a fan-like fashion, at a predetermined spray angle comprises: a step of forming a hollow hole 100 with a hemispherical tip along a center shaft line, from one end face 11b toward the other end face 10a of a columnar nozzle main body 1; and a step of forming a V-groove M1, at a predetermined depth, on the other end face 10a of the nozzle main body 1 and dividing a hemisphere into two equal pieces by the V-groove M1 to form the spray port 100a. In the hole forming step, a prescribed thickness is secured between a top of the hemispherical hollow hole 100 and the other end face 10a. In the spray port forming step, the V-groove M1 is formed while changing a depth of the V-groove M1 according to an inner angle of the V-groove M1 to be formed, referring to a correspondence table T that specifies the depth of the V-groove M1 according to the inner angle of the V-groove M1, and the spray port 100a for spraying water at the predetermined spray angle is formed.SELECTED DRAWING: Figure 5

Description

The present invention relates to a method for manufacturing a jet nozzle that jets water.

A cutting device that cuts a plate-shaped workpiece with a cutting blade performs cutting while supplying cutting water to a rotating cutting blade. Further, a water film is formed on the upper surface of the workpiece so that the cutting waste discharged by the cutting process does not adhere to the upper surface of the workpiece (see, for example, Patent Document 1).

JP, 2003-168659, A

The water film is formed by jetting water in the cutting feed direction from two nozzles arranged with the cutting blade interposed therebetween. Then, the water is ejected in a fan shape from the two nozzles.
As described above, in the cutting device, water is jetted from the two nozzles at the time of cutting and the jetting angle of water may be changed depending on the cutting feed rate, the cutting blade, or the like. Then, by keeping the supply pressure and the supply amount of water supplied to the nozzles constant, it is possible to inject water at a required spray angle by exchanging the two nozzles.

However, the technique of a skilled worker is required to form an injection port for ejecting water at a required injection angle in the nozzle, and there is a problem that the injection port cannot be easily formed.
Therefore, there is a problem in that it is not necessary to use the skill of a skilled worker when the jet nozzle is formed with a jet port for jetting water that spreads in a fan shape at a predetermined jet angle.

The present invention for solving the above-mentioned problems is a method of manufacturing an injection nozzle including an injection port that ejects water that spreads in a fan shape at a predetermined injection angle, and is directed from one end surface of a columnar nozzle body to the other end surface. A hole forming step of forming a hollow hole having a hemisphere at the tip along the central axis, and forming a V groove at a predetermined depth on the other end surface of the nozzle body, and dividing the hemisphere into two equal parts by the V groove. An injection port forming step of forming the injection port, wherein in the hole forming step, a predetermined thickness is left between the apex of the hollow hole of the hemisphere and the other end surface, and in the injection port forming step, The V-groove is formed by referring to a correspondence table in which the depth of the V-groove is defined according to the inner angle of the V-groove, and changing the depth of the V-groove according to the inner angle of the V-groove to be formed. And a method for manufacturing an injection nozzle that forms the injection port that injects water at a predetermined injection angle.

Further, the present invention for solving the above-mentioned problems is a method of manufacturing an injection nozzle including an injection port for injecting water that spreads in a fan shape at a predetermined injection angle, so as to pass on the central axis of a columnar nozzle body. A V-groove forming step of forming a V-groove having a predetermined depth from the other end surface of the nozzle body, and forming a hemispherical hollow hole at the tip from the one end surface of the nozzle body toward the other end surface along the central axis. An injection port forming step of forming the injection hole by communicating the hollow hole with the V groove, and in the injection port forming step, the tip of the hollow hole and the other end according to the inner angle of the V groove. With reference to the correspondence table in which the distance from the end face of the hollow hole is defined, the distance from the other end face to the tip of the hollow hole is changed according to the internal angle of the formed V groove to form the hollow hole. A method for manufacturing an injection nozzle that forms the injection port that injects water at a predetermined injection angle.

A method for manufacturing an injection nozzle according to the present invention includes a hole forming step of forming a hemispherical hollow hole at the tip from one end surface of a columnar nozzle body toward the other end surface along the central axis, and the other of the nozzle body. An injection port forming step of forming a V groove at a predetermined depth on the end face, and dividing the hemisphere into two equal parts by the V groove to form an injection port. In the hole forming step, the apex of the hollow hole of the hemisphere and the nozzle. A predetermined thickness is left between the other end surface of the main body, and in the injection port forming step, referring to a correspondence table in which the depth of the V groove is defined according to the inner angle of the V groove, the inner angle of the V groove to be formed is referred to. Accordingly, the depth of the V-groove can be changed to form the V-groove to form an injection port for injecting water at a predetermined injection angle, and therefore the skill of a skilled worker is not required.

The method for manufacturing an injection nozzle according to the present invention includes a V-groove forming step of forming a V-groove having a predetermined depth from the other end surface of the nozzle body so as to pass on the central axis of the columnar nozzle body, and the nozzle body. An injection port forming step of forming a hollow hole having a hemispherical tip at the tip thereof from one end face to the other end face along the central axis and communicating the hollow hole with the V groove to form an injection port. In the process, referring to the correspondence table in which the distance between the tip of the hollow hole and the other end surface is defined according to the inner angle of the V groove, from the other end surface to the tip of the hollow hole according to the inner angle of the formed V groove. Since a hollow hole can be formed by changing the distance to form an injection port for injecting water at a predetermined injection angle, the skill of a skilled worker is not required.

It is sectional drawing which shows the state which has formed the 1st hole with a flat drill in a nozzle main body. It is a sectional view showing a state where a hollow end having a hemispherical tip is formed in the nozzle body by a ball end mill. It is sectional drawing explaining the state which forms a V groove in a predetermined depth in the other end surface of a nozzle main body, and divides|segments the hemisphere of a hollow hole into two equal parts with a V groove, and forms an injection port. 8 is a correspondence table in which the depth of the V groove is defined according to the inner angle of the V groove to be formed. FIG. 5A is a cross-sectional view of an injection nozzle including an injection port that ejects water that spreads in a fan shape at a predetermined ejection angle of 80°. FIG. 5B is a plan view of an ejection nozzle including an ejection port that ejects water that spreads in a fan shape at a predetermined ejection angle of 80°. It is sectional drawing of the injection nozzle provided with the injection port which injects the water which spreads in fan shape with a predetermined injection angle of 70 degrees. It is sectional drawing of the injection nozzle provided with the injection port which injects the water which spreads in fan shape with a predetermined injection angle of 60 degrees. FIG. 6 is a cross-sectional view illustrating a state in which a V groove having a predetermined depth is formed from the other end surface of the nozzle body so as to pass on the central axis of the columnar nozzle body. It is sectional drawing which shows the state which has formed the 1st hole with a flat drill in a nozzle main body. 9 is a correspondence table in which the distance between the tip of the hollow hole and the other end face is defined according to the inner angle of the formed V groove. It is a sectional view showing a state where a hollow end having a hemispherical tip is formed in the nozzle body by a ball end mill. FIG. 12A is a cross-sectional view of an injection nozzle including an injection port that ejects water that spreads in a fan shape at a predetermined ejection angle of 80°. FIG. 12B is a plan view of an injection nozzle including an injection port that ejects water that spreads in a fan shape at a predetermined ejection angle of 80°. It is sectional drawing of the injection nozzle provided with the injection port which injects the water which spreads in fan shape with a predetermined injection angle of 70 degrees. It is sectional drawing of the injection nozzle provided with the injection port which injects the water which spreads in fan shape with a predetermined injection angle of 60 degrees.

(Embodiment 1)
Each step in the case of carrying out the method for manufacturing a jet nozzle according to the present invention to manufacture a jet nozzle having a jet port for jetting water that spreads in a fan shape at a predetermined jet angle will be described below.

(1) Hole Forming Step The nozzle body 1 shown in FIG. 1 is made of an alloy such as SUS or a resin such as polyetheretherketone, polytetrafluoroethylene, or polyacetal, and has a columnar outer shape. Specifically, the nozzle body 1 includes, for example, a hexagonal columnar head portion 10 and a columnar connecting portion 11 that is integrally formed on the rear end side of the head portion 10 and has a smaller diameter than the head portion 10. .. The total length of the nozzle body 1 is, for example, 10 mm. A screw 110 is cut on the outer surface of the connecting portion 11, and the connecting portion 11 can be screwed onto the inner peripheral surface of a pipe (not shown). The head portion 10 may be formed in a columnar shape.

In the hole forming step, a hollow hole having a hemispherical tip is formed along a central axis extending in the X-axis direction from one end surface 11b of the columnar nozzle body 1 shown in FIG. 1 toward the other end surface 10a. In the present embodiment, for example, the flat drill 2 rotating around the axis in the X-axis direction shown in FIG. 1 is used as a central axis extending in the X-axis direction from one end surface 11b of the nozzle body 1 to the other end surface 10a. The nozzle main body 1 is cut along it to reach the head portion 10 shown in FIG. 2 and form a cylindrical first hole 101 having a diameter of, for example, φ2.2.

Next, the ball end mill 3 rotating around the axis in the X-axis direction shown in FIG. 2 is installed along the central axis extending in the X-axis direction from the one end surface 11b of the nozzle body 1 to the other end surface 10a thereof. The tip of the hole 101 is cut, and the second hole 102 shown in FIG. 3 having a hemisphere and a diameter of, for example, φ1.5 is formed. As a result, the first hole 101 and the second hole 102 form a hollow hole 100 having a hemispherical tip. The total length of the hollow hole 100 is 9.8 mm. Further, a predetermined (for example, 0.2 mm) thickness is left between the apex of the hollow hole 100 having a hemispherical tip and the other end surface 10a.

In forming the hollow hole 100 having a hemispherical tip, first, the first hole 101 having a cylindrical shape is formed by the flat drill 2 in order not to wear the tip shape of the ball end mill 3 so much. .. Therefore, when the wear of the ball end mill 3 is not a concern, the tip end is a hollow hemisphere along the central axis extending from the one end surface 11b of the nozzle body 1 to the other end surface 10a of the nozzle body 1 only in the X axis direction. You may form a hole.

(2) Injection port forming step Next, a V groove is formed in the other end surface 10a of the nozzle body 1 at a predetermined depth, and the V groove is used to divide the hemisphere of the hollow hole 100 into two equal parts to form an injection port.
Specifically, the blade 4 rotating around the axis in the Z-axis direction shown in FIG. 3 is cut from the other end surface 10a of the nozzle body 1 toward the hollow hole 100 along the central axis extending in the X-axis direction. I will go. The tip of the blade 4 has a sharply pointed shape, and the cross-sectional shape is V-shaped with an internal angle of a predetermined angle (for example, 45°, 50°, or 55°). The blade 4 is not limited to the illustrated example.
For example, the blade 4 has a first blade that turns one slope of the V groove and a second blade that turns the other slope of the V groove in a circular shape so that the slopes of the V groove are turned one by one. It is preferable that the bases are alternately arranged circumferentially on the base.

In the injection port forming step, referring to the correspondence table T shown in FIG. 4 in which the depth of the V groove is defined according to the inner angle of the V groove to be formed, the depth of the V groove is set according to the inner angle of the V groove to be formed. change. That is, for example, when the internal angle of the V groove formed by using the blade 4 is set to 45°, the cutting amount of the blade 4 with respect to the nozzle body 1 is controlled, and the blade 4 shown in FIGS. A V-shaped groove M1 having a depth of 0.9 mm is formed, and an injection port 100a is formed by dividing the hemisphere of the hollow hole 100 into two equal parts by the V-shaped groove M1. That is, when water is supplied at a predetermined water amount (0.8 L/min) at a predetermined water pressure (0.3 Mpa), the water is supplied in the Y-axis direction (extending direction of the V groove M1) at a predetermined injection angle of 80°. It is possible to obtain the jet nozzle 1A including the jet port 100a that jets water that spreads in a fan shape.

The manufacturing method of the injection nozzle 1A according to the present invention includes a hole forming step of forming a hollow hole 100 having a hemispherical tip along the central axis line from one end surface 11b of the columnar nozzle body 1 toward the other end surface 10a, The V groove M1 is formed at a predetermined depth on the other end surface 10a of the nozzle body 1, and the V groove M1 divides the hemisphere into two equal parts to form the injection port 100a. A predetermined thickness is left between the apex of the hollow hole 100 of the hemisphere and the other end surface 10a of the nozzle body 1, and in the injection port forming step, the depth of the V groove M1 is defined according to the inner angle of the V groove M1. With reference to the correspondence table T, the depth of the V-groove M1 is changed according to the inner angle of the V-groove M1 to be formed, the V-groove M1 is formed, and water is jetted at a predetermined jet angle of 80°. Therefore, the skill of a skilled worker is not required.

For example, when the inner angle of the V groove formed by using the blade 4 is set to 50°, the cutting amount of the blade 4 with respect to the nozzle body 1 is controlled, and the V having a depth of 0.85 mm shown in FIG. The groove M2 is formed, and the V groove M2 forms an injection port 100b that divides the hemisphere of the hollow hole 100 into two equal parts. That is, when water is supplied at a predetermined water amount (0.8 L/min) at a predetermined water pressure (0.3 Mpa), the water is supplied in the Y-axis direction (extending direction of the V groove M2) at a predetermined injection angle of 70°. It is possible to obtain the ejection nozzle 1B including the ejection port 100b that ejects water that spreads in a fan shape.

For example, when the internal angle of the V groove formed by using the blade 4 is set to 55°, the cutting amount of the blade 4 with respect to the nozzle body 1 is controlled, and the V having a depth of 0.8 mm shown in FIG. 7 is controlled. The groove M3 is formed, and the V groove M3 forms an injection port 100c that divides the hemisphere of the hollow hole 100 into two equal parts. That is, when water is supplied at a predetermined water amount (0.8 L/min) at a predetermined water pressure (0.3 Mpa), the water is supplied in the Y-axis direction (extending direction of the V groove M3) at a predetermined jet angle of 65°. It is possible to obtain the ejection nozzle 1C including the ejection port 100c that ejects water that spreads in a fan shape.

(Embodiment 2)
Each step in the case of carrying out the method for manufacturing a jet nozzle according to the present invention to manufacture a jet nozzle having a jet port for jetting water that spreads in a fan shape at a predetermined jet angle will be described below.

(1) V-groove forming step In the present embodiment, first, a predetermined depth (for example, 0. 9 mm) V groove is formed.
Specifically, the blade 4 rotating around the axis in the Z-axis direction shown in FIG. 8 is cut from the other end surface 10a of the nozzle body 1 along the central axis extending in the X-axis direction. The tip of the blade 4 has a sharply pointed shape, and the cross-sectional shape is V-shaped with an internal angle of a predetermined angle (for example, 45°, 50°, or 55°). As a result, for example, the V groove M4 having a V groove angle of 45° shown in FIG. 9 is formed in the nozzle body 1 so as to extend in the Y axis direction.

(2) Injection port forming step Next, a hollow hole having a hemispherical tip is formed along the central axis from one end surface 11b of the nozzle body 1 toward the other end surface 10a, and the hollow hole is communicated with the V groove M4. To form. Then, in the injection port forming step, the correspondence table T2 shown in FIG. 10 in which the distance between the tip of the hollow hole and the other end face 10a is defined according to the inner angle of the V groove M4 is referred to, and the V groove M4 formed is formed. The hollow hole is formed by changing the distance from the other end surface 10a to the tip of the hollow hole according to the internal angle.
In the present embodiment, for example, the flat drill 2 rotating around the axis in the X-axis direction shown in FIG. 9 is attached to a central axis line extending in the X-axis direction from one end surface 11b of the nozzle body 1 to the other end surface 10a. The nozzle body 1 is cut along this, and reaches the head portion 10 shown in FIG. 11 to form a cylindrical first hole 103 having a diameter of, for example, φ2.2.

Next, the ball end mill 3 rotating around the axis in the X-axis direction shown in FIG. 11 is installed along the central axis extending in the X-axis direction from one end surface 11b of the nozzle body 1 to the other end surface 10a thereof. 12 is cut into the tip of the hole 103, and a second hole 104 having a hemispherical tip and a diameter of, for example, φ1.5 shown in FIG. 12 is formed to communicate with the V groove M4 to form an injection port 107a. Further, referring to the correspondence table T2 shown in FIG. 10, the distance from the other end surface 10a to the tip of the second hole 104 is set to 0.2 mm according to the internal angle of 45° of the formed V groove M4 shown in FIG. To do.
Thus, the first hole 103 and the second hole 104 form a hollow hole 107 having a hemispherical tip. The total length of the hollow hole 107 is 9.8 mm. When water is supplied at a predetermined water amount (0.8 L/min) at a predetermined water pressure (0.3 Mpa), the water is supplied in the Y-axis direction (extending direction of the V groove M4) at a predetermined injection angle of 80°. It is possible to obtain the jet nozzle 1D including the jet port 107a shown in FIGS. 12A and 12B for jetting the fan-shaped water.

When forming a hollow hole having a hemispherical tip, first, the first hole 103 having a cylindrical shape is formed by the flat drill 2 in order not to wear the tip shape of the ball end mill 3 so much. Therefore, only the ball end mill 3 may form the hollow hole 107 having a hemispherical tip along the central axis extending from the one end surface 11b of the nozzle body 1 to the other end surface 10a in the X-axis direction.

As described above, in the method for manufacturing an injection nozzle according to the present invention, the V groove having a predetermined depth (0.9 mm) from the other end surface 11b of the nozzle body 1 passes along the central axis of the columnar nozzle body 1. A V-groove forming step of forming M4 and a hollow hole 107 having a hemispherical tip and forming a hollow hole 107 is communicated with the V-groove M4 from one end surface 11b of the nozzle body 1 toward the other end surface 10a along the central axis. And an injection port forming step of forming the injection port 107a. In the injection port forming step, the distance between the tip of the hollow hole 107 and the other end surface 10a is defined according to the internal angle of the V groove M4. Referring to, the hollow hole 107 is formed with the distance from the other end surface 10a to the tip of the hollow hole 107 of 0.2 mm according to the internal angle of 45° of the formed V groove M4, and the predetermined injection angle is 80°. Since the jet port 107a for jetting water can be formed, the skill of a skilled worker is not required.

For example, when the internal angle of the V groove M5 shown in FIG. 13 formed using the blade 4 is set to 50°, the cutting amount of the ball end mill 3 with respect to the nozzle body 1 is controlled to communicate with the V groove M5. A hollow hole 108 having a hemispherical tip is formed, and the distance from the other end surface 10a to the tip of the hollow hole 108 is set to 0.25 mm in accordance with the internal angle of the formed V groove M5 of 50°. That is, when water is supplied at a predetermined water pressure (0.3 Mpa) and a predetermined water amount (0.8 L/min), in the Y-axis direction (extending direction of the V groove M5) at a predetermined jet angle of 70°. It is possible to obtain the ejection nozzle 1E including the ejection port 108a that ejects water that spreads in a fan shape.

For example, when the internal angle of the V groove M6 shown in FIG. 14 formed using the blade 4 is set to 55°, the cutting amount of the ball end mill 3 with respect to the nozzle body 1 is controlled to communicate with the V groove M6. Then, a hollow hole 109 having a hemispherical tip is formed, and the distance from the other end surface 10a to the tip of the hollow hole 109 is set to 0.3 mm in accordance with the internal angle 55° of the formed V groove M6. That is, when water is supplied at a predetermined water amount (0.8 L/min) at a predetermined water pressure (0.3 Mpa), the water is supplied in the Y-axis direction (extending direction of the V groove M6) at a predetermined jet angle of 60°. It is possible to obtain the ejection nozzle 1F including the ejection port 109a that ejects water that spreads in a fan shape.

Needless to say, the manufacturing method of the injection nozzle according to the present invention is not limited to the above-described first or second embodiment, and may be carried out in various different forms within the scope of the technical idea thereof. Further, the shape and configuration of the nozzle body 1 and the shapes and configurations of the blade 4 and the ball end mill 3 and the like shown in the accompanying drawings are not limited to this, and can be changed as appropriate within the range where the effect of the present invention can be exerted. Is.

1: Nozzle body 10: Head part 10a: Other end face 11: Connection part 110: Screw 11b: One end face 2: Flat drill 101: First hole 3: Ball end mill 102: Second hole 100: Tip is a hemisphere Hollow hole T: Correspondence table 4: Blade M1: V groove 100a: Injection port 1A: Injection nozzle M4: V groove 107: Hollow hole 107a: Injection port 1D: Injection nozzle

Claims (2)

A method for manufacturing an injection nozzle having an injection port for injecting water that spreads in a fan shape at a predetermined injection angle,
A hole forming step of forming a hollow hole having a hemispherical tip along the central axis line from one end surface of the columnar nozzle body toward the other end surface,
An injection port forming step of forming a V groove at a predetermined depth on the other end surface of the nozzle body, and dividing the hemisphere into two equal parts by the V groove to form the injection port;
In the hole forming step, leaving a predetermined thickness between the apex of the hollow hole of the hemisphere and the other end surface,
In the injection port forming step, the depth of the V groove is defined according to the inner angle of the V groove, and the depth of the V groove is changed according to the inner angle of the V groove to be formed. To form the V groove to form the ejection port for ejecting water at a predetermined ejection angle. A method for manufacturing an injection nozzle having an injection port for injecting water that spreads in a fan shape at a predetermined injection angle,
A V-groove forming step of forming a V-groove having a predetermined depth from the other end surface of the nozzle body so as to pass on the central axis of the columnar nozzle body;
An injection port forming step of forming a hollow hole having a hemispherical tip and communicating the hollow hole with the V groove to form the injection port along the central axis line from one end surface of the nozzle body toward the other end surface, Equipped with
In the injection port forming step, the correspondence table in which the distance between the tip of the hollow hole and the other end face is defined according to the inner angle of the V groove is referred to, and the distance corresponding to the inner angle of the formed V groove is referred to. A method for manufacturing an injection nozzle, wherein the hollow hole is formed by changing the distance from the other end surface to the tip of the hollow hole, and the injection port for injecting water at a predetermined injection angle is formed.

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