JP7332136B2 - Nozzles and nozzle modules - Google Patents

Description

The present invention relates to nozzles and nozzle modules for supplying fluids. INDUSTRIAL APPLICABILITY The present invention is useful as nozzles and nozzle modules in various fields. Specifically, but not limited to, nozzles and nozzle modules that inject coolants such as water and oil for various machine tools such as grinders, drills, cutting devices, and machining centers. It can be applied to a cooling device or a cleaning device.

Conventionally, when a machine tool such as a grinder or a drill is used to machine a workpiece made of metal into a desired shape, a coolant is supplied to a predetermined area including the contact area between the workpiece and the cutting tool. This cools down the heat generated during machining and removes shavings (also called chips) of the workpiece from the machining site. Cutting heat generated by high pressure and frictional resistance at the contact between the workpiece and the cutting tool wears out the cutting edge and reduces the strength, thereby shortening the life of tools such as cutting tools. Moreover, if the chips of the workpiece are not sufficiently removed, they may stick to the cutting edge during machining, degrading the machining accuracy.

The coolant reduces the frictional resistance between the tool and the work piece, removes cutting heat, and at the same time provides a cleaning action that removes chips from the surface of the work piece. Therefore, in a machine tool, it is important to accurately and efficiently inject a coolant to the contact portion between the tool and the workpiece and its surroundings.

Japanese Utility Model Laid-Open No. 60-175981 shows a conduit for supplying coolant and a nozzle connected to the tip thereof. The conduit has a desired length by connecting a plurality of pairs of female and male units forming a spherical pair. In addition, the nozzle has a spherical pair-shaped female portion on the inlet side, and a truncated cone-shaped nozzle on the outlet side, or the width dimension gradually decreases toward the outlet side. are connected to each other. However, when such conduits and nozzles are used as coolant supply means for machine tools, the direction of the coolant jet from the tip of the nozzle cannot be accurately determined, and the coolant is concentrated on the machining location. is not given in many cases, and the cooling efficiency is poor.

Japanese Patent Application Laid-Open No. 11-254281 discloses a processing apparatus that provides a gas ejection means for forcibly ejecting a gas (for example, a gas such as air) for forcibly infiltrating a machining fluid (coolant) into a contact portion between a tool and a workpiece. is disclosed. However, adding means for ejecting such gas at high speed and high pressure has the problem of increasing the cost and increasing the size of the apparatus.

Japanese Utility Model Laid-Open No. 60-175981 JP-A-11-254281

As described above, the prior art is not sufficient to discharge or spray the coolant in an appropriate position and direction, and the type of machine tool, the shape and size of tools such as grinding blades, or the workpiece When the shape, size, etc. are changed, there is a problem that it is difficult to accurately and efficiently discharge the coolant to a predetermined area including the contact portion between the tool and the workpiece. In addition, when a gas such as air is jetted and supplied together with the discharge and supply of the coolant, there is a problem that the scale of the apparatus is increased.

The present invention has been developed in view of such circumstances. SUMMARY OF THE INVENTION It is an object of the present invention to provide a nozzle and a nozzle module which mix a gas such as air in a fluid to be supplied and output with a simple structure and eject or eject the gas from an ejection port.

In order to solve the above problems, according to one embodiment of the present invention, it has the following configuration. The nozzle has an inlet through which fluid is supplied, an outlet through which the fluid is discharged, and an internal space connecting the inlet and the outlet. The nozzle is provided with a gas inflow hole for sucking gas into the internal space by the flow of fluid, and the cross-sectional shape of the wall surface of the internal space is a star-shaped polygon, a polygon, a petal shape, or a gourd shape. a plurality of gas inflow holes are formed on the same circumference in the wall surface of the internal space, and the corresponding gas outlets of the plurality of gas inflow holes are formed at the vertex of the cross-sectional shape of the internal space, The straightness of the discharged fluid is improved by causing the gas to flow in streaks at the vertex of the cross-sectional shape and the fluid to flow mainly in the center of the circle.
Further, according to another embodiment of the present invention, it has the following configuration. The nozzle module includes a hollow body to which fluid is supplied, and a fluid discharger connected to the body to discharge the fluid to the outside. The fluid ejection part has a cylindrical outer shape and one nozzle is formed, and this nozzle connects an inlet to which the fluid is supplied, an ejection port to which the fluid is ejected, and the inlet and the outlet. and a gas inflow hole is provided in the internal space by sucking the gas by the flow of the fluid, and the cross-sectional shape of the wall surface of the internal space is a star-shaped polygon, a polygon, a petal shape, or a petal shape. It is formed in a gourd shape, and a plurality of gas inflow holes are formed on the same circumference on the wall surface of the internal space, and the gas outlets of the corresponding plurality of gas inflow holes are formed at the vertex of the cross-sectional shape of the internal space. Gas flows in streaks at the apex of the cross-sectional shape, and the fluid mainly flows in the center of the circle, thereby improving the straightness of the discharged fluid.

According to an embodiment of the present invention, the nozzle is provided with a gas inlet hole that draws gas against the interior space by means of a fluid flow. A special mechanism for taking in gas is not required, and the apparatus does not become large.

When the nozzle and nozzle module of the present invention are used in a cooling device or a cleaning device for a machine tool, a large amount of air bubbles are generated due to the mixing of gas, which disappears together with the fluid after being discharged. , the cavitation phenomenon (effect) increases the cooling effect and cleaning effect. Therefore, it contributes to the cooling of the workpiece (workpiece) and helps to remove sludge (chips produced during machining) and chips. Clogging of cutting tools such as whetstones can also be reduced. In addition, the straightness of the fluid ejected from the nozzle (the direction of ejection or ejection is constant) is due to the fact that the gas flows in streaks at the vertex of the cross-sectional shape and the fluid mainly flows in the center of the circle. By gathering together, the property that the discharged or spouted fluid does not disperse or scatter here and there is improved, and it is possible to intensively irradiate the blade or the workpiece. In other words, it is possible to accurately and efficiently eject a fluid such as a coolant or a working fluid from the ejection port at a target position and angle.
The nozzles and nozzle modules of the present invention can also be used in other applications requiring gas entrainment. When air or other desired gas (e.g., oxygen, ozone, etc.) is mixed into the fluid, if the gas around the nozzle and nozzle module is filled as outside air, the gas inlet hole provided in the nozzle From there, gas is automatically aspirated in response to the fluid flow and expelled with the fluid. This gas is bubbled and discharged together with the fluid.

A better understanding of the present application is obtained when the following detailed description is considered in conjunction with the following drawings. These drawings are illustrative only and do not limit the scope of the invention.
1 shows an example of a machine tool with a nozzle according to some embodiments of the invention; 1 is a view showing the appearance of a nozzle having a star-shaped polygonal cross-section, particularly a four-star flow path, according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram showing a cross section of the nozzle of the first embodiment of the present invention in the direction in which fluid flows. It is a partially cutaway state diagram of the nozzle of the first embodiment of the present invention. It is a figure which shows the external appearance of the modification of the nozzle of 1st Embodiment of this invention. FIG. 4 is a partially cutaway state diagram of a modified example of the nozzle of the first embodiment of the present invention; FIG. 10 is a diagram showing the appearance of a further modified example of the nozzle of the first embodiment of the present invention; FIG. 7 is a view showing the appearance of a nozzle having a polygonal cross section, particularly a hexagonal flow path, according to a second embodiment of the present invention; It is a partially cutaway state diagram of the nozzle of the second embodiment of the present invention. FIG. 8 is a view showing the appearance of a nozzle having a petal-shaped cross-section, particularly a four-petal-shaped channel, according to a third embodiment of the present invention; It is a partially cutaway state diagram of the nozzle of the third embodiment of the present invention. FIG. 10 is a diagram showing the appearance of a nozzle having a circular flow path in cross section according to a fourth embodiment of the present invention; It is a partly notched state figure of the nozzle of 4th Embodiment of this invention. (A) to (L) are diagrams showing various cross-sections of the flow path of the nozzle. 4 shows another example of a machine tool with a nozzle according to some embodiments of the invention; 4 shows yet another example of a machine tool with nozzles according to some embodiments of the present invention; FIG. 10 is a diagram showing the appearance of a turret-type nozzle module having a nozzle with a star-shaped polygonal cross-section, particularly a four-star-shaped channel, according to a fifth embodiment of the present invention; FIG. 11 is a partially cutaway state diagram of a nozzle module according to a fifth embodiment of the present invention; FIG. 10 is a view showing the appearance of a nozzle for a turret nozzle module having a plurality of two-stage star-shaped polygonal flow paths according to a sixth embodiment of the present invention. FIG. 11 is a partially cutaway state diagram of a nozzle according to a sixth embodiment of the present invention; FIG. 12 is an external view showing a modified example of the nozzle according to the sixth embodiment of the present invention; FIG. 11 is a partially cutaway state diagram of a modified example of the nozzle of the sixth embodiment of the present invention; FIG. 11 is an external view showing another modified example of the nozzle according to the sixth embodiment of the present invention; FIG. 11 is a partially cutaway state diagram of another modified example of the nozzle of the sixth embodiment of the present invention; FIG. 11 is an external view showing still another modification of the nozzle according to the sixth embodiment of the present invention; FIG. 11 is a partially cutaway state diagram of still another modified example of the nozzle of the sixth embodiment of the present invention; FIG. 11 is an external view showing another modified example in addition to the nozzle according to the sixth embodiment of the present invention; FIG. 11 is a partially cutaway state diagram of another modified example in addition to the nozzle of the sixth embodiment of the present invention. FIG. 20 is a diagram showing the appearance of a flat nozzle module having a plurality of two-stage star-shaped polygonal flow paths according to a seventh embodiment of the present invention. FIG. 11 is a partially cutaway state diagram of a nozzle module according to a seventh embodiment of the present invention; FIG. 21 is an external view showing a modified example of the nozzle module according to the seventh embodiment of the present invention; FIG. 20 is a partially cutaway state diagram of a modified example of the nozzle module of the seventh embodiment of the present invention; 1 illustrates an example machine tool with a nozzle module according to some embodiments of the present invention;

In this specification, embodiments in which the nozzle and nozzle module of the present invention are mainly applied to machine tools such as grinders and machining centers will be described, but the field of application of the present invention is not limited thereto. The nozzles and nozzle modules of the present invention are applicable to a wide variety of fluid delivery applications. In particular, when air or other desired gases (e.g., oxygen, ozone, etc.) are mixed into the fluid, if the surroundings of the nozzles and nozzle modules are filled with such gases, the gas inlet holes provided in the nozzles From there, gas is automatically aspirated in response to the fluid flow and expelled with the fluid. This gas is bubbled and discharged together with the fluid. When a gas other than air is sucked as outside air, the surroundings of the nozzles and nozzle modules must be sealed and filled with the gas.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a machine tool with nozzles according to some embodiments of the invention. The machine tool of this example is a surface grinder. The surface grinder 100 includes a grinding blade (grindstone) 2, a protective cover 4, a height adjustment portion 6, a coolant pipe 8, a coolant hose 9, and a nozzle 10 (specifically, nozzles 10AA to 10F). Although not shown, the surface grinder 100 includes a table for moving the workpiece W1 on the plane, a column for vertically moving the workpiece W1 or the grinding blade 2, and the like.

The grinding blade 2 is rotated clockwise in the plane of FIG. 1 by a drive source (not shown). surface is ground. The protective cover 4 surrounds the grinding blade 2 rotating at high speed and protects the operator around the grinder by preventing chips of the workpiece W1 from scattering during grinding.

A height adjuster 6 is provided on the protective cover 4 to fix the vertically movable coolant pipe 8 at a desired height. This allows the nozzle 10 connected to the coolant pipe 8 to be positioned at a suitable height with respect to the grinding blade 2 and the workpiece W1. One end of the coolant pipe 8 is connected to a nozzle 10 via a coolant hose 9, and the other end is connected to a tank (not shown) that stores a coolant (for example, water or oil). The coolant hose 9 has a desired length by connecting a plurality of pairs of female and male units forming a spherical pair. The material is resin (plastic). In addition, the connection structure allows the connection angle to be appropriately adjusted, and the direction of the nozzle 10 to be determined. The material of the nozzle 10 can also be resin (plastic), but is not limited to this. The nozzle 10 can be fixed at an optimum position and direction by operating the height adjustment unit 6 and adjusting the angle of the coolant hose so that the coolant is ejected from the nozzle 10 to the grinding point G. In the nozzle 10, the sucked gas is mixed with the coolant (fluid) to generate a large amount of bubbles, which disappear after being discharged, resulting in a cavitation phenomenon (effect) that enhances the cooling effect and the cleaning effect. . In other words, it contributes to the cooling of the workpiece (work), removes sludge (chips produced during processing) and chips, and reduces clogging of blades such as grindstones. In addition, since the gas flows in a streaky shape in the nozzle, the straightness of the fluid discharged from the nozzle is increased, and the cutting tool and the workpiece can be irradiated in a concentrated manner.

(First embodiment)
FIG. 2 shows the appearance of the nozzle 10A according to the first embodiment of the invention. FIG. 3 is a diagram showing a cross section of the nozzle 10A in the direction in which the fluid flows, and FIG. 4 is a diagram showing a partially cutaway state of the nozzle 10A. As is clear from these drawings, the nozzle 10A is connected to the coolant hose 9 of FIG. It has a wall surface 10A-c forming an internal space connecting 10A-a and the ejection port 10A-b. The inlet 10A-a has a spherical shape and is connected to the male unit at the end of the coolant hose 9. As shown in FIG. The wall surfaces 10A-c have a cross section of a star-shaped polygon, specifically a four-star shape. In addition, as long as it is a star-shaped polygon, various star-shaped shapes such as an eight-star shape can be adopted in addition to the four-star shape. The cross-sectional shape or area of the internal space formed by the wall surfaces 10A-c may be constant from the inlet 10A-a to the outlet 10A-b, or may be constant from the inlet 10A-a to the outlet 10A-b. You may make it shrink|reduce gradually toward (that is, a taper is applied to the flow path of internal space). In FIG. 3, the wall surface 10A-c having the same cross section as that of the discharge port 10A-b has a shape that continues for a certain length. Conversely, the outer surface of nozzle 10A is tapered, and the thickness between the outer surface and wall surface 10A-c is shown to gradually decrease toward outlet 10A-b. Of course, it is also possible to make this thickness constant.

10A-d1 to 10A-d4 are gas inflow holes, and in the first embodiment, four gas inflow holes are formed from the outer surface of the nozzle 10A toward the wall surface 10A-c forming the internal space. . From the gas inlets 10A-d1 to 10A-d4, external air (usually air) is sucked into the internal space by the flow of fluid. The gas inflow holes 10A-d1 to 10A-d4 are positioned near the inflow port 10A-a (in front of the middle of the length of the nozzle 10A in the fluid flow direction (right to left in FIG. 3), that is, in FIG. on the right side of the This is because the gas suction efficiency is better than that provided at a position closer to the outflow port 10A-c (on the left side in FIG. 3).

The gas inlet 10A-d1 (the other gas inlets 10A-d2 to 10A-d4 are the same) is a circular gas inlet IN on the outer surface of the nozzle 10A, as is clear from the cross-sectional view of FIG. to the circular gas outlet OUT of the internal space. The angle of inclination is preferably 5 to 45 degrees, preferably 20 to 30 degrees, with respect to the inflow direction of the fluid, in terms of gas suction force. In this case, the gas inlet hole 10A-d1 (the other gas inlet holes 10A-d2 to 10A-d4 are also similar) has a large diameter (accordingly area) of the gas inlet IN on the outer surface of the nozzle, The gas outlet OUT on the wall surface has a small diameter (and thus an area) and is formed in a tapered and inclined truncated cone shape. Such a tapered shape increases the gas suction effect. Of course, the gas inlets IN and the gas outlets OUT of the gas inlet holes 10A-d1 to 10A-d4 may be polygonal such as quadrilaterals, and tapered truncated pyramids may be formed between them. The gas outlets OUT of the gas inlet holes 10A-d1 to 10A-d4 are connected to the apexes of the four-star cross-sectional shape of the internal space, that is, the four protruding portions of the star (hands of the star). It is Of course, the connection position does not have to be the vertices of the four-star shape, but the gas is sucked into the four star-shaped projections (hands of the star), so that the internal space of the nozzle 10A is The gas flows in streaks through the four star-shaped protrusions, and the fluid mainly flows through the circular portion at the center of the star, thereby improving the straightness of the fluid discharged from the nozzle 10A.

In the nozzle 10A according to the first embodiment, the four gas inflow holes 10A-d1 to 10A-d4 are provided at positions on the same circumference rotated by 90 degrees corresponding to the four star-shaped protrusions. , but not necessarily. FIG. 5A is an external view of a nozzle 10B according to a modified example of the first embodiment, and FIG. 5B is a partially cutaway state view thereof. Similar to the first embodiment, this nozzle 10B has a four-star cross section and eight gas inlet holes 10B-d1 to 10B-d8. It is provided at the same position as in the first embodiment, and the remaining gas inflow holes 10B-d5 to 10B-d8 are provided further downstream on the same circumference. The gas inflow holes 10B-d5 to 10B-d8 in this case are also connected to the vertices of the cross-sectional shape of the internal space, that is, the four protruding portions of the star (hands of the star). Therefore, a larger amount of gas is sucked by doubly sucking the gas into the four star-shaped protruding portions (hand portions of the star). In addition, more gas than in the first embodiment flows into the four star-shaped protrusions in the inner space of the nozzle 10A, and the fluid mainly flows through the circular central portion, so that the nozzle The straightness of the fluid discharged from 10A is improved.

FIG. 6 is an external view of a nozzle 10C according to a further modification of the first embodiment, which has eight gas inflow holes 10C-d1 to 10C-d8. The remaining gas inlet holes 10C-d5 to 10C-d8 are provided on the same circumference in the downstream direction at positions shifted by 45 degrees. That is, the gas inlet holes 10C-d5 to 10C-d8 are arranged in a staggered manner with respect to the gas inlet holes 10C-d1 to 10C-d4. The gas inflow holes 10C-d5 to 10C-d8 are connected to the four apexes of the star-shaped concave portions (the apexes of the concave portions between the projections of the star). Thus, by forming a plurality of rows of gas inlet holes at appropriate positions from the fluid inlet port 10C-a toward the fluid outlet port 10C-b, it is possible to improve the gas suction effect. In addition, the straightness of the coolant discharged from the discharge port 10C-b is improved.

(Second embodiment)
FIG. 7A shows the appearance of a nozzle 10D according to the second embodiment of the invention. FIG. 7B is a partially cutaway view of the nozzle 10D. As is clear from these drawings, the wall surface 10D-c of the nozzle 10D has a shape with a polygonal, specifically hexagonal cross section. As for polygons, various polygons such as octagons can be used in addition to hexagons. In the second embodiment, six gas inflow holes 10D-d1 to 10D-d6 are provided at positions on the same circumference rotated by 60 degrees corresponding to six vertices of a hexagon. The position of the gas inflow holes 10D-d1 to 10A-d6 in the flow direction of the coolant, the angle of inclination with respect to the inflow direction, the shape of a truncated cone or pyramid, and the size of each aperture (therefore, the area) , can be appropriately changed or selected as in the first embodiment. Of course, the connecting positions of the gas inflow holes 10D-d1 to 10D-d6 to the wall surface 10D-c may not be the vertices of the hexagon, but the gas is sucked into each vertex of the hexagonal cross section, so that the nozzle The gas flows in streaks in the six vertex portions of the internal space 10D, and the fluid mainly flows in the circular central portion, thereby improving the straightness of the fluid discharged from the nozzle 10A. In addition, the number of gas inflow holes is not limited to six. It is possible to improve the gas suction effect by forming the groove. In either case, gas inflow holes may be connected to each side of the hexagon other than the vertexes of the hexagonal cross section. In addition, the description of the configuration similar to that of the first embodiment will be omitted.

(Third Embodiment)
FIG. 8A shows the appearance of a nozzle 10E according to the third embodiment of the invention. FIG. 8B is a state diagram in which a part of the nozzle 10E is cut away. As is clear from these drawings, the wall surface 10E-c of the nozzle 10E has a petal-shaped, specifically four-petaled cross-section. As for the petal shape, various petal shapes such as an eight-petal shape can be adopted in addition to the four-petal shape. In the third embodiment, the four gas inflow holes 10E-d1 to 10E-d4 are arranged on the same circumference rotated by 90 degrees corresponding to the four vertices of the four-petal shape (that is, the point of the maximum diameter of the petals). position. The position of the gas inflow holes 10E-d1 to 10E-d4 in the flow direction of the coolant, the angle of inclination with respect to the inflow direction, the shape of a truncated cone or pyramid, and the size of each caliber (therefore, the area) , can be appropriately changed or selected as in the first embodiment. Of course, the connecting positions of the gas inflow holes 10E-d1 to 10E-d4 to the wall surface 10E-c may not be the vertices of the petal shape, but the gas may be sucked into each of the four vertices of the four-petal shape. As a result, the gas flows in streaks in the four vertex portions of the internal space of the nozzle 10E, and the fluid mainly flows in the central circular portion, thereby improving the straightness of the fluid discharged from the nozzle 10E. Further, the number of gas inflow holes is not limited to four, and a plurality of rows (even in a zigzag pattern) are arranged at appropriate positions from the fluid inflow port 10E-a toward the discharge port 10E-b. It is possible to improve the gas suction effect by forming the groove. In either case, the gas inlet holes may be connected to, for example, the apexes of the minimum diameter positions of the petals other than the vertices of the maximum diameter of the four-petal cross section. In addition, the description of the configuration similar to that of the first embodiment will be omitted.

(Fourth embodiment)
FIG. 9A shows the appearance of a nozzle 10F according to the fourth embodiment of the invention. FIG. 9B is a state diagram with a part of the nozzle 10F cut away. As is clear from these drawings, the wall surface 10F-c of the nozzle 10F has a circular shape. In addition to the perfect circle, various shapes such as oval, elliptical, and gourd can be used. In the fourth embodiment, four gas inflow holes 10F-d1 to 10F-d4 are provided at positions on the same circumference rotated by 90 degrees. The position of the gas inflow holes 10F-d1 to 10F-d4 in the flow direction of the coolant, the angle of inclination with respect to the inflow direction, the shape of a truncated cone or pyramid, and the size of each aperture (therefore, the area) , can be appropriately changed or selected as in the first embodiment. In the fourth embodiment, the gas is sucked into four points spaced apart by 90 degrees, so that the gas flows in streaks through the four points in the internal space of the nozzle 10F, and the fluid mainly flows through the central circular portion. Therefore, the straightness of the fluid ejected from the nozzle 10F is improved. Also, the number of gas inflow holes is not limited to four, and can be appropriately selected from three, six, or any other number. Further, by forming multiple rows (which may or may not be staggered) at appropriate positions from the fluid inflow port 10F-a toward the fluid discharge port 10F-b, the gas suction effect is enhanced. becomes possible. In addition, the description of the configuration similar to that of the first embodiment will be omitted.

10A to 10L, which have already been partially described, show various shapes that can be adopted as the cross section of the internal space of the nozzle 10. FIG. Of these, (A), (E), and (I) show petal-shaped cross-sectional shapes. (B) shows an oval cross-sectional shape, and (C), (D), (F), (J), and (K) show various polygonal cross-sectional shapes. (G) shows a gourd-shaped cross-sectional shape, and (H) and (L) show a star-shaped polygonal cross-sectional shape. Of course, other suitable cross-sectional shapes can be adopted for the internal space of the nozzle 10 . Regarding the straightness of the discharged fluid from the nozzle 10, the petal-shaped cross-sectional shapes of (A), (E), and (I) and the star-shaped multiple cross-sectional shapes of (H) and (L) are particularly excellent. It has a rectangular cross-sectional shape. When the nozzle 10 adopts various cross-sectional shapes shown in FIG. 10, the number, position, and shape of the gas inflow holes can be changed or changed as appropriate.

In the above description, the nozzle according to the embodiment of the present invention was used for a surface grinder, but it may be applied to other machine tools. FIG. 11 shows another example of a machine tool provided with nozzles according to an embodiment of the present invention. The machine tool in this example is a cylindrical grinder. The cylindrical grinder 200 includes a grinding blade 202, a protective cover 204, a position adjusting portion 206, a coolant pipe 208, a coolant hose 9, and a nozzle 10 (specifically, the first to fourth embodiments). including nozzles 10A to 10F according to). Although not shown in FIG. 11, the cylindrical grinder 200 includes a transfer device that supports the workpiece W2 at the center of both end faces, rotates it, and moves it along the central axis (that is, in the Z-axis direction). The grinding blade 202 is rotated clockwise in the plane of FIG. 11 by a drive source (not shown), and the workpiece W2 is ground by the friction between the outer peripheral surface of the grinding blade 202 and the contact surface of the workpiece W2. The surface is ground. The protective cover 204 surrounds the grinding blade 202 rotating at high speed and protects the operator around the grinding machine by preventing chips from the workpiece W2 from scattering during grinding.

A position adjusting portion 206 is provided on the protective cover 204 to fix the coolant pipe 208 movable in the X-axis direction at a desired position. As a result, the nozzle 10 connected to the coolant hose 9 connected to the coolant pipe 208 is arranged at the optimum position where the coolant can be sprayed around the grinding point G of the workpiece W2 by the grinding blade 202. . The other end of the coolant pipe 208 is connected to a tank (not shown) that stores coolant. Even in such a cylindrical grinder, in the nozzle 10 according to the embodiment of the present invention, the sucked gas is mixed with the coolant (fluid), so that a large amount of bubbles are generated and disappear after discharge. Therefore, the cooling effect and the cleaning effect are enhanced by the cavitation phenomenon (effect). In other words, it contributes to the cooling of the workpiece (work), removes sludge (chips produced during processing) and chips, and reduces clogging of blades such as grindstones. In addition, since the gas flows in a streaky shape in the nozzle, the straightness of the fluid discharged from the nozzle is increased, and the cutting tool and the workpiece can be irradiated in a concentrated manner.

FIG. 12 shows the application of the nozzle according to the embodiment of the present invention to a machining center, which is another machine tool. A large number of different types of tools (cutters) 302 are exchangeably attached to a spindle 304 in the machining center 300 . The spindle 304 can rotate the tool 302 with a spindle motor (not shown). It also has a drive unit (not shown) for moving the spindle 304 and the tool (cutting tool) 302 up and down. In the machining center 300, by changing the tool 302, various operations such as milling, drilling, boring, and tapping can be performed. In addition to this spindle 304 , a plurality of nozzles for supplying coolant are attached to the column 306 . The two nozzles 10 inject the coolant supplied via the coolant hose 9, centering on the machined portion G of the workpiece W3, and are related to the above-described first to fourth embodiments. Nozzles 10A to 10F are applicable. In the nozzle 10, the sucked gas is mixed with the coolant (fluid) to generate a large amount of bubbles, which disappear after being discharged, resulting in a cavitation phenomenon (effect) that enhances the cooling effect and the cleaning effect. . In other words, it contributes to the cooling of the workpiece (workpiece), removes sludge (chips produced during machining) and chips, and reduces clogging of the cutting tool. In addition, since the gas flows in a streaky shape in the nozzle, the straightness of the fluid discharged from the nozzle is increased, and the cutting tool and the workpiece can be irradiated in a concentrated manner. The machining center 300 also has three small single nozzles 303, which are tubular nozzles and have a structure in which the discharge angle of the cooling liquid can be freely changed. In addition to these spindle 304 and tool 302 , two nozzles 10 connected to coolant hoses 9 and three single nozzles 303 are attached to column 306 . Of course, the type and number of nozzles 10 and single nozzles 303 can be appropriately selected and attached to the column 306 . Although not shown, each nozzle 10 and single nozzle 303 are connected to a tank (not shown) that stores a coolant (for example, water or oil). The workpiece W3 can be moved two-dimensionally on a horizontal plane by a table (not shown).

(Fifth embodiment)
Next, with reference to FIGS. 13 and 14, a turret-type nozzle module 400, which is a single nozzle having a single fluid ejection port, according to a fifth embodiment of the present invention will be described. The nozzle module 400 is connected to the coolant hose 9 of FIG. 1 (or FIG. 11, FIG. 12, and FIG. 23 described later) by screw connection. The material of the nozzle module 400 can be resin (plastic) or metal such as stainless steel, but is not limited thereto.

The nozzle module 400 has a body portion 401 and a fluid ejection portion (nozzle) 410 . A female thread 401-2 is formed on the inner surface of the protruding portion 403 of the main body 401, and a male thread 410-1 is formed on the corresponding portion (inlet) of the nozzle 410 to be screwed. there is Of course, the connection between the main body portion 401 and the nozzle 410 is not limited to screw connection (screw engagement), and may be fitting or press-fitting, as long as they can be connected detachably. As will be described later, the body portion 401 has a hollow interior and feeds the fluid supplied from the coolant hose 9 to the nozzle 410 .

As is clear from FIG. 14, the nozzle module 400 is connected to the coolant hose 9 by screw connection. That is, a female thread 401-1 screwed to a male thread formed at the end of the coolant hose 9 is formed on the fluid inlet side of the main body 401, and a female thread 401-2 is formed on the fluid outlet side as described above. formed to threadably engage external threads 410-1 of nozzle 410; The body portion 401 has a wide, hollow internal space. Therefore, the nozzle 410 has a narrower flow path for the coolant than the main body 401, and the coolant is discharged from the end of the nozzle 410 at a high flow pressure. As illustrated, a flow path is formed in the internal space of the nozzle 410 . Specifically, the nozzle 410 has an inlet 410-a into which a coolant (fluid) flows, an outlet 410-b through which the coolant is discharged, and an internal space connecting the inlet 410-a and the outlet 410-b. and a wall surface 410-c forming a . From the inflow port 410-a to the discharge port 410-b, a wall surface 410-c having a star-shaped polygonal, more specifically, a four-star cross-sectional shape is formed. Of course, as this cross-sectional shape, various cross-sectional shapes described in the first to fourth embodiments and illustrated in FIG. 10 can be employed.

In the nozzle 410, four gas inlet holes 410-d1 to 410-d4 are formed on the same circumference rotated by 90 degrees corresponding to the four vertices of the four-star shape (that is, the protruding portions of the star). position. This position is nearer to the middle of the length of nozzle 410 near inlet 410-a (right side in the drawing). This is because the gas suction efficiency is better than that provided at a position near the outflow port 410-b (on the left side in the drawing). The inclination angle of the gas inflow holes 410-d1 to 410-d4 with respect to the fluid inflow direction, the truncated cone shape or the truncated pyramid shape, and the size of each aperture (therefore, the area) are the same as in the first embodiment. It can be changed or selected as appropriate. Of course, the connecting positions of the gas inflow holes 410-d1 to 410-d4 to the wall surface 410-c may not be the vertices of the four-star shape, but the gas is sucked to each of the four vertices of the four-star shape. As a result, the gas flows in streaks in the four vertex portions of the internal space of the nozzle 410, and the fluid mainly flows in the circular center, so that the straightness of the fluid discharged from the nozzle 410 is improved. Further, the number of gas inflow holes is not limited to four, and a plurality of rows (even in a zigzag pattern) are arranged at appropriate positions from the fluid inflow port 410-a toward the discharge port 410-b. It is possible to improve the gas suction effect by forming the groove. In either case, the gas inflow holes may be connected to, for example, the smallest inner diameter position of the star besides the apex of the four-star cross section. When the nozzle 410 employs the various cross-sectional shapes described in the first to fourth embodiments and FIG. 10, the number, positions, and shapes of the gas inlet holes can be changed as appropriate.

Further, in the description of the fifth embodiment based on FIGS. 13 and 14, the nozzle 410 is combined with the body portion 401, and the male thread 410-1 of the nozzle 410 and the female thread 401-2 of the body portion 401 are screwed together to form the nozzle. It is used as a module 400. However, the nozzle 410 alone can also be used by being directly screwed to the coolant hose 9 shown in FIG. 1 (or FIGS. 11, 12, and FIG. 23 described later). In this case, the main body 401 needs to be prepared, although the fluid ejection pressure is generally increased by using it in combination with the main body 401 .

(Sixth embodiment)
Next, referring to FIGS. 15A and 15B, a fluid ejection portion (multi-nozzle) having a plurality of star-shaped polygonal flow paths in a two-stage configuration of a turret nozzle module 500 according to a sixth embodiment of the present invention. 510 will be described. This nozzle 510 has a generally prismatic shape as a whole, and has a male thread 510-1 at the inflow side end that is screwed to the female thread 401-2 of the main body 401 described in the fifth embodiment. The material of the nozzle 510 can also be resin (plastic) or metal such as stainless steel, but is not limited thereto. As described above, the main body portion 401 is hollow inside and delivers the fluid supplied from the coolant hose 9 to the fluid discharge portion 510 .

As is clear from FIG. 15A or FIG. 15B, a two-stage, four-star flow path is formed inside the nozzle 510 . In FIG. 15A, there are three upper rows and two lower rows, which are staggered. 510-b1 to 510-b3 are provided at the ejection side end of the nozzle 510, and 510-b4 to 510-b5 are provided at the lower ejection port. Correspondingly, the inlet ends of the nozzles are provided with inlets 510-a1 to 501-a3 and 510-a4 to 510-a5, respectively, through which coolant (fluid) passes. An internal space is formed by wall surfaces 510-c1 to 510-c3 and 510-c4 to 510-c5. The cross-sectional shape of each wall surface 510-c1 to 510-c5 is a four-star shape. Of course, as this cross-sectional shape, various cross-sectional shapes described in the first to fourth embodiments and illustrated in FIG. 10 can be adopted.

Then, on the top surface of the nozzle 510, at a position closer to the ejection ports 510-b1 to 510-b3 (left side in the drawing) than the middle position in the direction of fluid flow (from right to left in the drawing), An oblique prism-shaped protrusion 510-T is provided. Gas inflow holes 510-d1 to 510-d3 connected to the upper three wall surfaces 510-c1 to 510-c3 are formed inside the protrusion 510-T. The position where the protrusion 510-T is provided is not near the inlets 510-a1 to 510-a3 (the right side in FIGS. 15A and 15B), but on the left side of the outlets 510-b1 to 510-b3 (in the drawings). 15A and 15B) is because the gas suction efficiency is better. The inclination from the gas inlet IN of each of the gas inlets 510-d1 to 510-d3 to the gas outlet OUT is 5 degrees to 45 degrees, preferably 20 degrees to 30 degrees, with respect to the inflow direction of the fluid. is formed as The gas inlet holes 510-d1 to 510-d3 are tapered and tapered to a truncated cone shape or a truncated pyramid shape. That is, the gas inlet IN has a large diameter (and thus an area), and the gas outlet OUT, which is a connecting port with the wall surfaces 510-c1 to 510-c3, has a relatively small diameter (and therefore an area). In FIG. 15B, the gas outlet OUT is connected to the apex of the four-star cross section (star-shaped protruding portion). In such a configuration, gas is drawn into the interior space by the flow of fluid. Further, the inflow ports of the gas inflow holes 510-d1 to 510-d3 are provided with depressions K for promoting the inflow of gas.

The number of flow paths formed inside the nozzle 510 can be changed as appropriate, and in addition to the two-stage configuration, a single-stage configuration or a three-stage configuration or more may be used. Also, the number of flow paths connected to the gas inflow holes can be changed as appropriate. The shape of the protrusion 510-T may not be oblique prismatic, but may be prismatic, cylindrical, or elliptical. may be Furthermore, the nozzle 510 as a whole has a prismatic or cylindrical shape, a plurality of flow paths are formed therein, and all or part of each flow path has a gas inlet hole formed with a specific inclination angle. It is only necessary to form a connection.

In the above description of the sixth embodiment, the nozzle 510 is combined with the main body portion 401 and screwed together to be used as the nozzle module 500. However, the nozzle 510 alone is shown in FIG. 12 and the coolant hose 9 shown in FIG. 23) to be described later. In this case, the main body 401 needs to be prepared although the pressure applied to the fluid to be discharged generally increases when it is used in combination with the main body 401 .

FIGS. 16A and 16B show a modification of the sixth embodiment, showing a fluid discharge section (multi-nozzle) 610 of a turret nozzle module 600. FIG. One of the differences from the sixth embodiment is that the fluid inlets 610-a1 to 610-a3 and the fluid outlets 610-b1 to 610-b3 have a single-stage configuration. Another difference is that the upper surface of the fluid ejector 610 is provided with two oblique prism-shaped protrusions 610-T1 and 610-T2. Protrusions 610-T1 and 610-T2 are provided in order from the inflow ports 610-a1 to 610-a3. Gas inlet holes 610-d1 to 610-d3 and 610-d4 to 610-d6 connected to 610-c3 are formed. At least the protrusion 610-T2 is closer to the ejection ports 610-b1 to 610-b3 (left side in the drawing) than the center position of the nozzle 610 with respect to the direction of fluid flow (from right to left in the drawing). placed in position. Of course, the protrusion 610-T1 may also be provided at a position closer to the discharge ports 610-b1 to 610-b3 (left side in the drawing) than the central position of the nozzle 610. FIG. The structures of these protrusions 610-T1 and 610-T2 are the same as the protrusions 510-T of the sixth embodiment, so description thereof will be omitted. From the gas inflow holes 610-d1 to 610-d3 and 610-d4 to 610-d6 provided in the protrusions 610-T1 and 610-T2, the flow paths formed by the wall surfaces 610-c1 to 610-c3 As a result, a larger amount of gas is sucked than in the case of the gas inlet hole of one protrusion as in the sixth embodiment.

The shape of the protrusions 610-T1 and 610-T2 may not be oblique prismatic, but may be prismatic, circular or elliptical, or gas inlet holes 610-d1 to 610-d3 and 610-d4. 610-d6 may be individually formed protrusions. Further, the nozzle 610 has a prismatic or cylindrical shape as a whole without providing the protrusions 610-T1 and 610-T2, and a plurality of flow paths are formed therein, and all or part of each flow path On the other hand, a configuration may be adopted in which gas inflow holes formed with a specific inclination angle are connected to each other.
Other configurations and actions in this modified example are the same as those in the sixth embodiment, so description thereof will be omitted.

Next, another modification of the sixth embodiment will be described with reference to FIGS. 17A and 17B. One of the differences from the sixth embodiment (FIGS. 15A and 15B) is that the fluid inlets 710-a1 to 710-a3 and the fluid outlets 710-b1 to 710-b3 are single-tiered and circular. , the wall surfaces 710-c1 to 710-c3 connecting the two and forming the internal space forming the flow path have a circular cross section. Needless to say, the shape of this flow path is not limited to a circle, and may take various forms other than a star-shaped polygon as shown in FIG.

Another difference is that the protrusion 710-T has an oblique prism shape as a whole, and has a tapered truncated pyramid shape with a taper connecting to the three wall surfaces 710-c1 to 710-c3 inside. It is that a common space is formed. In other words, the gas inlet IN becomes one common square, and individual small round or square gas outlets OUT are formed at one end of each of the wall surfaces 710-c1 to 710-c3. The space formed in the protrusion 710-T functions like a chamber that stores outside air and sends the gas to individual flow paths through which fluid flows.
Other configurations and actions in this modified example are the same as those in the sixth embodiment, so description thereof will be omitted.

Next, still another modification of the sixth embodiment will be described with reference to FIGS. 18A and 18B. The difference from the modification described in FIGS. 17A and 17B is that two flat plate-like projections 810-T1 and 810-T2 are formed in parallel on the upper surface of the nozzle 810, There is no frame. The outside air is taken in from the gas inlet IN, which is the space formed by the two projections 810-T1 and 810-T2, and the individual small nozzles formed at one end of the wall surfaces 810-c1 to 810-c3, respectively. From the round or square gas outlet OUT, the fluid is sucked into the fluid channel formed by the wall surfaces 810-c1 to 810-c3. In other words, the two protrusions 810-T1 and 810-T2 play a role of a so-called "screen", and the flow of the fluid causes the gas to flow from the gas inlet IN to the gas outlet OUT. It promotes being sucked in the oblique direction of
Other configurations and actions in this modified example are the same as those in the sixth embodiment, so description thereof will be omitted.

Next, another modified example in addition to the sixth embodiment will be described with reference to FIGS. 19A and 19B. 17A and 17B is that no protrusion is provided on the upper surface of the nozzle 810, outside air is taken in from a common gas inlet IN formed on the outer surface of the nozzle, and the wall surface is Sucked into the fluid flow path formed by the wall surfaces 910-c1 to 910-c3 from the individual small round or square gas outlet OUT formed at one end of each of 910-c1 to 910-c3 That is. Even in this case, if the speed of the fluid flowing through the flow path is high, the external air is sucked and mixed with the fluid flowing in from the inlets 910-a1 to 910-a3, and the fluid flows through the outlets 910-b1 to 910- It will be discharged from b3.
Other configurations and actions in this modified example are the same as those in the sixth embodiment, so description thereof will be omitted.

(Seventh embodiment)
Next, a flat nozzle module according to a seventh embodiment of the present invention will be described with reference to FIGS. 20 and 21. FIG. FIG. 20 shows the appearance of a nozzle module 1000 according to the seventh embodiment. The material of the nozzle module 1000 can also be resin (plastic), metal such as stainless steel, but is not limited thereto.

The nozzle module 1000 has a main body portion 1001 and a substantially prismatic fluid ejection portion (flat multi-nozzle) 1010 . Although these two are integrally molded, they may be manufactured separately and then joined together. The nozzle 1010 may be horizontal with respect to the main body 1001, but in the example of FIGS. 20 and 21 has an upward angle of 7 degrees with respect to the horizontal plane. This angle is set so that the coolant can be easily applied to the cutting tool or the work when the coolant is discharged. This inclination angle can be changed as appropriate.

The nozzle module 1000 is connected to the coolant hose 9 by screw connection. In other words, a female thread 1001 - 1 is formed on the fluid inlet side of the main body 1001 to be screwed with the male thread formed on the end of the coolant hose 9 . A nozzle 1010 is connected to the outlet side. As shown in FIG. 21, the main body 1001 has a wide hollow internal space. Therefore, the nozzle 1010 has a narrower passage for the coolant than the main body 1001, so that the coolant is discharged from the end portion at a high flow pressure. As shown, the nozzle 1010 of the nozzle module 1000 has multiple fluid outlets. Specifically, nine outlets 1010-b1 to 1010-b9 are formed in the upper stage, and eight outlets 1010-b11 to 1010-b18 are formed in the lower stage in a zigzag pattern. Correspondingly, nine inlets (1010-a1 to 1010-a9) and eight inlets (1010-a11 to 1010-a18) are provided in a staggered manner in the upper stage. And to connect between them, the cross section is a star-shaped polygon, specifically a four-star wall, nine on the upper level (1010-c1 to 1010-c9) and eight on the lower level (1010-c11 to 1010 -c18) They are provided in a zigzag pattern, forming a total of 17 internal spaces to constitute a multi-nozzle flow path. The cross-sectional shape of each wall surface 1010-c1 to 1010-c9 and 1010-c11 to 1010-c18 is a four-star shape. Various cross-sectional shapes described in FIG. 10 can be employed.

The nozzle 1010 has ejection ports 1010-b1 to 1010-b9 and 1010-b11 to 1010-b18 side (left side of the drawing) from the middle position of the fluid flow direction (direction from right to left in the drawing). An oblique prism-shaped protrusion 1010-T is provided on the side closer to the right side. Gas inflow holes 1010-d1 to 1010-d9 connected to the upper nine wall surfaces 1010-c1 to 1010-c9 are formed inside the protrusion 1010-T. Since the protrusion 1010-T is positioned closer to the outlets 1010-b1 to 1010-b9 (on the left side of the drawing), it is farther from the outlets 1010-b1 to 1010-b9 (on the right side of the drawing). , gas suction efficiency is good. The inclination from the gas inlet IN of each of the gas inlets 1010-d1 to 1010-d9 to the gas outlet OUT is 5 degrees to 45 degrees, preferably 20 degrees to 30 degrees, with respect to the fluid inflow direction. is formed in The gas inflow holes 1010-d1 to 1010-d9 are tapered and tapered to a truncated cone shape or a truncated pyramid shape. That is, the gas inlet IN has a large diameter (and thus an area), and the gas outlet OUT, which is a connecting port with the wall surfaces 1010-c1 to 1010-c9, has a relatively small diameter (and therefore an area). Also, in FIG. 21, the gas outlet OUT, which is a connecting port, is connected to one of the vertexes (star-shaped protruding portions) of the four-star cross section. In such a configuration, gas is drawn into the interior space by the flow of fluid. Further, the gas inlets IN of the gas inlet holes 1010-d1 to 1010-d9 are provided with recesses (not shown) for promoting the inflow of gas.

The number of flow paths formed inside the fluid ejection section 1010 can be changed as appropriate, and may be a single stage configuration or a three or more stage configuration in addition to the two-stage configuration. Also, the number of flow paths connected to the gas inflow holes can be changed as appropriate. The shape of the protrusion 1010-T may not be oblique prismatic, but may be prismatic, cylindrical, or elliptical, or a protrusion in which gas inflow holes 1010-d1 to 1010-d9 are individually formed. may be Further, as in the modification of the sixth embodiment (see FIGS. 16A and 16B), a plurality of protrusions having gas inflow holes may be provided so that a plurality of gas inflow holes are connected to one channel. . Furthermore, as in another modification of the sixth embodiment (see FIGS. 17A and 17B), protrusions having common gas inlets may be provided, and in addition to the sixth embodiment, another As in a modification (FIGS. 18A and 18B), two so-called "screen" projections may be provided in parallel.

22A and 22B are an external view showing a modified example of the nozzle module according to the seventh embodiment and a partially cutaway state view. In the seventh embodiment, there is a protrusion 1010-T having a gas inlet formed therein, but in this modified example there is no such protrusion. On the outer surface of the nozzle, a wall surface 1100-c1 in which a round or square gas inlet IN forms a flow path connecting the fluid inlets 1100-a1 to 1100-a9 and the outlets 1100-b1 to 1100-b9. 9 are formed corresponding to 1100-c9. A round or square gas outlet OUT is formed in the upper part of the wall surfaces 1100-c1 to 1100-c9, and gas inlet holes 1100-d1 to 1100-d9 are formed between the gas inlets IN. . In this case, it is desirable that the diameter (therefore, the area) of the gas outlet OUT is smaller than the diameter (therefore, the area) of the gas inlet IN.

Also in this case, if the flow of fluid is large, outside air is sucked from the gas inlet, mixed with the fluid flowing in the flow path, and discharged from the discharge ports 1100-b1 to 1100-b9. In this way, without providing the nozzle 1010 with the protrusion 1010-T, the entirety is formed into a prismatic or cylindrical shape, and a plurality of flow paths are formed therein. It is also possible to connect the gas inlet holes formed with an inclination angle of .
Other configurations and actions in this modified example are the same as those in the seventh embodiment, so description thereof will be omitted.

As nozzle modules 400, 500, 600, 700, 800, and 900 configured by connecting the nozzles 410, 510, 610, 710, 810, and 910 according to the fifth and sixth embodiments alone or to the main body 401 Furthermore, the nozzle modules 1000 and 1100 according to the seventh embodiment can also be employed as coolant supply means for various machine tools such as surface grinders and cylindrical grinders. It can be used for various applications in need.

FIG. 23 shows the nozzle module 400 (or 500, 600, 700, 800, 900) and nozzle module 1000 (or 1100) applied to a machining center. Machining center 1200 has many different types of tools (cutters) 1202 interchangeably attached to spindle 1204 . The spindle 1204 can rotate the tool 1202 with a spindle motor (not shown). It also has a drive unit (not shown) for moving the spindle 1204 and the tool (cutting tool) 1202 up and down. The machining center 1200 enables various operations such as milling, drilling, boring, and tapping by changing the tool 1202 . In addition to this spindle 1204 , a plurality of nozzles for supplying coolant are attached to the column 1206 . The two nozzle modules 400 and 1000 inject the coolant supplied via the coolant hose 9 around the work site G of the workpiece W4. In each of the nozzle modules 400 and 1000, the sucked gas is mixed with the coolant (fluid) to generate a large number of bubbles, which disappear after ejection, resulting in a cooling effect and a cooling effect due to the cavitation phenomenon (effect). Increases cleaning effect. In other words, it contributes to the cooling of the workpiece (workpiece), removes sludge (chips produced during machining) and chips, and reduces clogging of the cutting tool. In addition, since the gas flows in a streaky shape in the nozzle, the straightness of the fluid discharged from the nozzle is increased, and the cutting tool and the workpiece can be irradiated in a concentrated manner. The machining center 1200 also has four small single nozzles 1203, which are tubular nozzles that can freely change the discharge angle of the cooling liquid. In addition to these spindle 1204 and tool 1202 , two nozzle modules 1000 and 400 connected to coolant hoses 9 and three single nozzles 1203 are attached to column 806 . Of course, the type and number of nozzle modules and single nozzles can be appropriately selected and attached to the column 1206 . Although not shown, each of the nozzle modules 400 and 1000 and the four single nozzles 1203 are connected to a tank (not shown) that stores a coolant (for example, water or oil). The workpiece W4 can be moved two-dimensionally on a horizontal plane by a table (not shown).

Although the present invention has been described using multiple embodiments, the present invention is not limited to such embodiments. A person having ordinary knowledge in the technical field to which the present invention belongs should
Many variations and other embodiments of the invention can be derived from the above description and the associated drawings. Although specific terms are used herein, they are used in a generic sense only for the purpose of description and not for the purpose of limiting the invention. Various modifications are possible without departing from the general inventive concept and spirit defined by the appended claims and their equivalents.

100 surface grinder 200 cylindrical grinder 300, 1200 machining center 2, 202 grinding blade (grindstone)
302, 1202 tool (cutting tool)
W1, W2, W3, W4 Work piece 9 Coolant hose 10 (10A, 10B, 10C, 10D, 10E, 10F) Nozzle 10A-a, 410-a, 510-a2, 610-a2, 710-a2, 810- a2, 910-a2, 1010-a5, 1100-a5 Inlet 10A-b, 410-b, 510-b2, 610-b2, 710-b2, 810-b2, 910-b2, 1010-b5, 1100-b5 Discharge port 10A-c, 410-c, 510-c2, 610-c2, 710-c2, 810-c2, 910-c2, 1010-c5, 1100-c5 Wall surface 10A-d1~10A-d4, 10B-d1~ 10B-d8, 10C-d1 to 10C-d8, 10D-d1 to 10D-d6, 10E-d1 to 10E-d4, 10F-d1 to 10F-d4, 410-d1 to 410-d4, 510-d1 to 510- d3, 610-d1 to 610-d3, 610-d4 to 610-d6, 710-d2, 810-d2, 910-d3, 1010-d1 to 1010-d9, 1100-d5 Gas inflow holes 400, 500, 600, 700, 800, 900, 1000, 1100 nozzle module 401, 1001 main body 410, 510, 610, 710, 810, 910 fluid ejection part (nozzle)
510-T, 610-T1, 610-T2, 710-T, 810-T1, 810-T2, 1010-T Projection

Claims (12)

an inlet through which fluid is supplied;
an ejection port through which the fluid is ejected;
an internal space connecting the inflow port and the outflow port;
a nozzle having
A gas inflow hole is provided in the internal space to absorb gas by the flow of fluid, and the cross-sectional shape of the wall surface of the internal space is formed in a star-shaped polygon, a polygon, a petal shape, or a gourd shape. A plurality of gas inflow holes are formed on the same circumference in the wall surface of the space, and gas outlets of the corresponding plurality of gas inflow holes are formed at the apexes of the cross-sectional shape of the internal space. The gas flows in streaks in the part, and the fluid mainly flows in the center part of the circle, so that the straightness of the discharged fluid is improved.
nozzle. 2. The nozzle according to claim 1 , wherein the gas inlet hole penetrates obliquely from the gas inlet of the outer surface of the nozzle to the gas outlet of the internal space. 2. The nozzle according to claim 1 , wherein the gas inlet hole has a large diameter at the gas inlet on the outer surface of the nozzle and a small diameter at the gas outlet at the wall surface of the internal space, and is formed to be tapered. . 4. The nozzle according to claim 3, wherein the gas inlet of the gas inlet is formed on the side closer to the fluid inlet. 5. The nozzle according to any one of claims 1 to 4, wherein the gas inlet holes are formed in a plurality of rows from the fluid inlet toward the outlet. Coolant is supplied as a fluid to the nozzle, air is sucked in as gas from the gas inlet, and the coolant is discharged together with the air from the discharge port to cool the tool and the workpiece. 6. A nozzle as claimed in any one of claims 1 to 5, characterized in that it can be used in a machine. a hollow body to which a fluid is supplied;
a fluid ejection part connected to the body part and ejecting the fluid to the outside;
with
The fluid ejection part has a cylindrical outer shape and is formed with one nozzle,
This nozzle
having an inlet through which fluid is supplied, an outlet through which fluid is discharged, and an internal space connecting the inlet and the outlet;
A gas inflow hole is provided in the internal space to absorb gas by the flow of fluid, and the cross-sectional shape of the wall surface of the internal space is formed in a star-shaped polygon, a polygon, a petal shape, or a gourd shape. A plurality of gas inflow holes are formed on the same circumference in the wall surface of the space, and gas outlets of the corresponding plurality of gas inflow holes are formed at the apexes of the cross-sectional shape of the internal space. The gas flows in streaks in the part, and the fluid mainly flows in the center part of the circle, so that the straightness of the discharged fluid is improved.
nozzle module. 8. The nozzle module according to claim 7 , wherein the gas inflow hole penetrates obliquely from the gas inflow port on the outer surface of the nozzle to the gas outflow port on the wall surface of the internal space. 9. The nozzle according to claim 8 , wherein the gas inlet hole has a large diameter of the gas inlet on the outer surface of the nozzle, and a small diameter of the gas outlet on the wall surface of the internal space, and is formed to be tapered. module. 10. The nozzle module according to claim 9 , wherein the gas inlet of the gas inlet is formed on the side closer to the fluid inlet. 11. The nozzle module according to any one of claims 7 to 10, wherein the gas inlet holes are formed in a plurality of rows from the fluid inlet toward the outlet. A coolant is supplied as a fluid to the nozzle module, air is sucked as gas from the gas inlet of the nozzle, and the coolant is discharged together with the air from the discharge port to cool the tool and the workpiece. 12. A nozzle module according to any one of claims 7 to 11, characterized in that it can be used in a machine tool with a