JP4006358B2 - nozzle - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a nozzle for supplying a fluid to a desired location, and in particular, a grinding fluid or cooling at a contact location (processing location) between a processing material being processed by various grinding machines or polishing machines and a rotating abrasive (grinding stone). The present invention relates to a nozzle for supplying a fluid such as water.
[0002]
[Prior art]
In general, when processing a work material with a grinding machine, the work material that is rotated or held stationary is automatically fed to a grindstone that rotates at high speed, and the work material is processed to obtain the desired dimensional accuracy and surface roughness. Etc. are secured. At this time, frictional heat is generated in the grinding wheel in contact with the materials, or to deform the workpiece, which may or not be secured to the desired accuracy and the like. Therefore, conventionally, a large amount of grinding fluid or cooling water is supplied to the contact point between the grindstone and the work material to cool the work material, suppress heat generation due to frictional heat, and prevent adverse effects on work accuracy. Also, removal of chips generated during processing is performed.
[0003]
In this case, conventionally, the nozzle is provided in the vicinity of the contact point between the grindstone and the processing material so as to face the outer peripheral surface of the circular grindstone with an appropriate interval, and the grinding liquid, cooling water, etc. are supplied from the nozzle. It was supplied to hit the contact point. In addition, as a prior application related to the present invention, there are the following patent documents and the like.
[0004]
[Patent Document 1]
JP 2000-141219 A [Patent Document 2]
JP 2003-94333 A
[Problems to be solved by the invention]
However, an air flow is generated in the rotational direction along the outer peripheral surface of the grindstone due to the high-speed rotation of the grindstone, and the grinding liquid or cooling water discharged from the nozzle by this air flow is the most demanded of the above-mentioned supply. There was a problem of not hitting the contact area. For this reason, when machining materials that require more precise machining, the supply of grinding fluid, cooling water, etc. using a nozzle with a conventional configuration solves the above problems and makes the machining material highly demanding. It was difficult to finish. Further, the wear of the grindstone is accelerated, and the replacement interval with a new grindstone is shortened, which causes the processing cost to increase.
[0006]
The present invention has been developed in view of the above points, and the object of the present invention is to make contact points (processing points) between a grindstone and a processing material such as a grinding machine and a polishing machine, and grindstones and processing. It is an object of the present invention to provide a nozzle capable of supplying a fluid such as a grinding liquid or cooling water to a material efficiently and reliably.
[0007]
[Means for Solving the Problems]
In order to effectively achieve the above object, the present invention is configured as follows. That is, the nozzle according to the first aspect of the present invention comprises a nozzle body and a fluid supply pipe provided at a fluid inlet of the nozzle body. The nozzle body has a mountain shape when viewed from the front and has a partition plate portion inside. A fluid discharge passage that communicates with the fluid supply pipe and a second discharge port at the other end by forming a closed end and temporarily retaining a part of the fluid discharged from the first discharge port of the fluid discharge passage. And the internal space of the temporary residence passage and the second discharge port are larger than the internal space of the fluid discharge passage and the first discharge port. .
[0008]
A nozzle according to a second aspect of the present invention is the nozzle configuration according to the first aspect, wherein the end of the first discharge port and the second discharge port side partition plate portion forms a fluid discharge passage of the nozzle body. It is located inside the end by the side of the 1st discharge port of an outer wall part, It is characterized by the above-mentioned.
[0009]
According to a third aspect of the present invention, there is provided the nozzle according to the first or second aspect, wherein the fluid discharge passage is formed as an enlarged opening from the inflow port to the front of the first discharge port, and the first discharge port. It is characterized in that it is formed in a gradually reduced opening extending from the front to the first discharge port.
[0010]
A nozzle according to a fourth aspect of the present invention is the nozzle configuration according to the first, second, or third aspect, wherein the nozzle body is formed on the upper outer wall portion inclined from the top to both sides by the first discharge port and the second discharge port. A shielding plate is provided so as to protrude forward.
[0011]
According to a fifth aspect of the present invention, in the nozzle configuration according to the fourth aspect, the shielding plate is a flexible plate member made of synthetic resin.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIGS. 2-4 is a figure regarding the nozzle 1 of 1st Example of this invention. In addition, in FIG. 2, although it has the shielding board 14 mentioned later, illustration is abbreviate | omitted. The nozzle 1 according to the first embodiment includes a nozzle body 2 and a fluid supply pipe 3 provided at the inlet 4 at the rear end of the nozzle body 2. The nozzle body 2 is provided at the lower end portion of the fluid supply pipe 3 so as to be inclined slightly downward at an angle slightly larger than 90 ° with respect to the fluid supply pipe 3 (in the attached drawings, 90 ° for convenience). (Of course, it may be 90 °). By providing in this way, when the fluid supply pipe 3 is provided vertically in the vicinity of the grindstone, a fluid such as a grinding fluid or cooling water can be more effectively applied from the nozzle body 2 to the contact portion.
[0013]
As shown in the figure, the nozzle body 2 is entirely formed in a mountain shape when viewed from the front, and has a fluid discharge passage 9 that communicates with the fluid supply pipe 3 by a partition plate portion 8 inside, and a fluid discharge passage that is closed at one end. A part of a fluid such as a grinding fluid or cooling water discharged from the first discharge port 5a is temporarily retained, and is divided into a temporary retention passage 10 which is discharged from the second discharge port 5b at the other end. is there.
[0014]
The back end of the fluid discharge passage 9 communicates with the fluid supply pipe 3. The fluid discharge passage 9 has a mountain-shaped cross section with a central portion raised and both sides inclined downward, and is formed hollow by a partition plate portion 8 and a lower outer wall portion 11 having a cross-sectional mountain shape. The fluid discharge passage 9 is formed in a gradually enlarged opening from the inflow port 4 to the front of the first discharge port 5a, and is formed in a gradually reduced opening from the front of the first discharge port 5a to the first discharge port 5a. The fluid discharge passage 9 may be a passage that allows fluid to flow in a straight line that is not formed in the gradually expanding opening and the gradually reducing opening as described above.
[0015]
The temporary residence passage 10 described above is formed in an internal hollow by the partition plate portion 8 and the upper outer wall portion 12 having a mountain-shaped cross section. The inner end of the temporary residence passage 10 is closed.
[0016]
The internal space 10 a and the second discharge port 5 b of the temporary residence passage 10 are formed larger than the internal space 9 a and the first discharge port 5 a of the fluid discharge passage 9. This is because when the nozzle body is configured to have only the fluid discharge passage 9, in order to instantaneously supply a large amount of grinding fluid, cooling water, etc. It is necessary to supply a fluid such as grinding fluid or cooling water by increasing the size. For this purpose, a large-capacity supply pump is required, which increases the installation cost and running cost of the pump. Therefore, the fluid discharged from the first discharge port 5a of the fluid discharge passage 9 is once sent to the upper temporary residence passage 10, and the fluid is transferred from the second discharge port 5b to the contact location via the large-capacity temporary residence passage 10. By supplying a large amount of fluid, a large amount of fluid can be supplied to the contact portion at a time.
[0017]
The tip 11a of the lower outer wall portion 11 of the nozzle body 2 and the tip 12a of the upper outer wall portion 12 are flush with each other. The ends 8a of the partition plate portion 8 on the leading ends 11a, 12a side, that is, on the first and second discharge ports 5a, 5b are formed so as to be located slightly inside the leading ends 11a, 12a. And a temporary passageway 10 are provided. The fluid discharged from the first discharge port 5 a of the nozzle body 2 by the communication passage 13 is supplied to the contact portion and is sent to the temporary retention passage 10 through the communication passage 13. And more grinding fluid, cooling water, etc. are supplied to the said contact location also from the 2nd discharge outlet 5b of this temporary residence channel | path 10. FIG.
[0018]
In addition, on the inclined outer surfaces on both sides of the inclined upper outer wall portion 12 of the nozzle body 2, two shielding plates 14, which are flexible plastic plate members, are provided on the first and second discharge ports 5 a and 5 b. It is pasted so as to protrude further forward. The interval between the shielding plates 14 is close so that the first and second discharge ports 5a and 5b of the nozzle body 2 face the outer peripheral end surface of a circular grindstone provided in the grinding machine with a slight gap. When provided, the spacing is such that both shielding plates 14 can approach each other with a slight gap on both sides of the grindstone (see FIG. 12).
[0019]
The shielding plates 14 block the air flow generated on both sides of the grindstone T by the grindstone T rotating at high speed (see FIG. 9), and the grinding fluid from the first and second discharge ports 5a, 5b to the contact points It is intended not to adversely affect the discharge flow of fluid such as cooling water. Further, since the shielding plate 14 is not a hard member but a flexible plastic plate member, even if it touches the grindstone T that rotates at high speed, the shielding plate 14 instantaneously disengages from the nozzle body 2. Or the damage to the grindstone T. Of course, the shielding plate 14 may be formed of other materials.
[0020]
The nozzle 1 of the present invention having the above-described configuration (see FIGS. 10 to 12) has an outer peripheral end surface t (see FIGS. 11 and 11) of a circular grindstone T of a grinder, for example, with the top side of the angled shape of the nozzle body 2 facing upward. 12), the first and second discharge ports 5a and 5b of the nozzle body 2 are opposed to each other with a slight gap, and both the shielding plates 14 are placed on both sides of the grindstone T with a slight gap. And place them close to each other.
[0021]
In this manner, the nozzle 1 is provided in the vicinity of the grindstone T of the grinder, and the processing material is ground from the lower side of the nozzle body 2 by contacting the outer peripheral end surface t of the grindstone T. At this time, the airflow generated along the outer peripheral end surface t of the grindstone T by the grindstone T rotating at high speed is blocked by hitting the upper outer wall portion 12 of the mountain-shaped nozzle body 2 (see FIGS. 8 and 9).
[0022]
Therefore, the action | operation which obstructs the flows of fluids, such as a coolant liquid supplied to the said contact location direction, a grinding fluid, and cooling water, is prevented. Further, the air flow generated along both sides of the grindstone T by the grindstone T rotating at high speed is blocked by the both shielding plates 14 as described above (see FIGS. 8, 9, and 11). Therefore, the effect | action which obstructs the flow of the grinding fluid supplied to the said contact location direction of the air flow of this both sides, a cooling water, etc. is also prevented. Therefore, it is possible to reliably supply a large amount to the contact portion between the grindstone T and the processing material that require the most grinding fluid, cooling water, etc. during processing.
[0023]
Conventionally, a nozzle is provided at the base of the grindstone cover or inside or near the cover to prevent sludge accumulation and scattering of the fluid during processing of the cover and nozzle. However, post-treatment of sludge, grinding fluid, cooling water, etc. was a problem. However, by forming it in a mountain shape like the nozzle body 2 of the nozzle 1 of the present invention, it is possible to predict the scattering direction of the grinding fluid, cooling water, etc., and at the same time reduce the generation of sludge and the like. In addition, the chevron-shaped nozzle body 2 can reduce the accompanying air flow to both sides of the grinding wheel T that rotates at high speed, and the grinding fluid, cooling water, etc., can enter the grinding wheel T and the work material. It can be stabilized.
[0024]
Further, the discharged fluid or the like wraps around both side surfaces of the grindstone T due to the configuration of the nozzle body 2 and the increase in the area of the outer peripheral end surface t, the action of the internal shape of the fluid discharge passage 9 and the Coanda phenomenon. The portion that has flowed and overflowed gathers on the outside of the upper outer wall portion 12, the communication passage 13 of the partition plate portion 8, and the like. This gathering portion becomes a gathering of dense fluid due to the influence of turbulence. The fluid at the gathering portion covers the gap between the grindstone T and the nozzle body 2, reduces the entrainment flow and the air flow around, and supplies the fluid stably. The effect of the cleansing effect leads to an increase in cutting during grinding and a decrease in the number of dressings.
[0025]
1 includes a fluid passage 6 formed in a gradually enlarged opening from one end to the vicinity of the other end, and formed in a gradually reducing opening from the vicinity of the other end to the other end. The nozzle body 2 is provided with a fluid supply pipe 3.
[0026]
That is, the nozzle body 2 is formed in a gradually enlarged opening from the inlet 4 of fluid such as grinding fluid, cooling water, or lubricating oil to just before the discharge port 5, and gradually from the front of the discharge port 5 to the discharge port 5. The fluid passage 6 formed in the reduced opening has a predetermined triangular thickness in plan view having the inside. The fluid enters the fluid passage 6 of the nozzle body 2 from the inlet 4 and is discharged from the discharge port 5. In the illustrated example, the discharge port 5 is a rectangle having a width of 5 mm and a length of 85 mm, and a boundary between the gradually enlarged opening and the gradually reduced opening of the fluid passage 6 is formed at a position 25 mm vertically from the outlet end. However, the overall size of the nozzle body 2, the shape and size of the discharge port 5, and the position of the boundary are not limited to the illustrated example, but can be freely changed to any shape, size, and position. .
[0027]
The fluid supply pipe 3 has a screw hole 7 formed at the center of the nozzle body 2 on the inlet 4 side. One end of the fluid supply pipe 3 is screwed in and connected to the fluid passage 6. . A pipe or a hose is attached to the other end of the fluid supply pipe 3, and a grinding liquid, cooling water, or the like is fed into the fluid passage 6 of the nozzle body 2 by a pump or the like.
[0028]
The nozzle 1 is provided on a grinder, a floor, or the like so that the discharge port 5 faces a little obliquely upward with respect to the outer peripheral end surface of a circular grindstone of a grinder (not shown), for example. A processing material to be processed with a grindstone that rotates at high speed is located in the vicinity of the nozzle 1.
[0029]
By supplying a grinding liquid, cooling water, or the like from the discharge port 5 of the nozzle 1 to the processing material to be processed by the grindstone, the grinding liquid, cooling water, or the like is supplied from the inlet 4 to the discharge port 5 as described above. The fluid gradually passes through the fluid passage 6 formed in the gradually enlarged opening from the front of the discharge port 5 to the discharge port 5 from the front of the discharge port 5. By discharging a fluid such as a grinding fluid or cooling water through the fluid passage 6, a flow of the grinding fluid or cooling water or the like flowing into the side surface portion of the circular grinding wheel rotating at high speed such as a grinding machine can be generated. A fluid such as a grinding fluid or cooling water can be efficiently applied to both side surface portions of the grindstone as well as the contact portion between the outer peripheral end surface of the steel and the processing material. Further, in the nozzle 1 described above, the grinding fluid, cooling water, etc. discharged by the air flow of the grinding stone are not flowed in the other direction, and the grinding fluid, cooling water, etc. are efficiently applied to the contact points between the grinding stone T and the work material. Can be supplied. This can reduce the adverse effect of frictional heat on the work material and the like.
[0030]
【The invention's effect】
As is apparent from the above description, the nozzle of the present invention includes a fluid discharge passage that communicates with the fluid supply pipe through the partition plate portion inside the nozzle body, and grinding fluid, cooling water, etc. discharged from the fluid discharge passage. A part of the fluid is temporarily formed to be temporarily retained and discharged, and the temporary retention passage is made larger than the fluid discharge passage. The fluid discharged from the first discharge port of the fluid discharge passage is once sent to the upper temporary residence passage, and is discharged from the second residence port through the temporary residence passage, thereby being discharged from the temporary residence passage. By the fluid and the fluid discharged from the fluid discharge passage, a large amount of fluid can be supplied to the contact portion between the outer peripheral end surface of the grindstone and the processing material at a time. As a result, it is possible to efficiently supply the grinding fluid, cooling water, or the like to the contact portion between the grindstone T and the processing material, and to reduce the adverse effect of the frictional heat on the processing material or the like.
[Brief description of the drawings]
FIG. 1 is a plan view of a nozzle having some constituent features of the present invention.
FIG. 2 is a perspective view of a nozzle according to the first embodiment of the present invention.
FIG. 3 is a front view of the nozzle body according to the first embodiment of the present invention.
FIG. 4 is a side view of the nozzle body of the nozzle according to the first embodiment of the present invention.
FIG. 5 is an explanatory diagram viewed from above the nozzle body of the nozzle according to the first embodiment of the present invention.
FIG. 6 is an explanatory diagram viewed from above the partition plate portion in the nozzle body of the nozzle according to the first embodiment of the present invention.
FIG. 7 is an explanatory diagram viewed from above the fluid discharge passage in the nozzle body of the nozzle according to the first embodiment of the present invention.
FIG. 8 is an explanatory view seen from the side when the nozzle according to the first embodiment of the present invention is used;
FIG. 9 is an explanatory diagram viewed from the side when the nozzle according to the first embodiment of FIG. 8 is used;
FIG. 10 is an explanatory diagram in which the nozzle according to the first embodiment of the present invention is provided in the vicinity of the grindstone.
FIG. 11 is an explanatory view showing an air flow generated along a side of a rotating grindstone.
12 is an explanatory view of the state of FIG. 11 as viewed from above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nozzle 2 Nozzle main body 3 Fluid supply pipe 4 Inflow port 5 Discharge port 5a 1st discharge port 5b 2nd discharge port 6 Fluid path 8a End of partition plate part 8 Partition plate part 9 Fluid discharge path 11a 1st of lower outer wall part Discharge port side end 12 Upper outer wall portion 14 Shield plate

Claims (5)

A nozzle body and a fluid supply pipe provided at the fluid inlet of the nozzle body, the nozzle body having a mountain shape when viewed from the front, and a fluid discharge passage that communicates with the fluid supply pipe by a partition plate inside. One end is closed, and a part of the fluid discharged from the first discharge port of the fluid discharge passage is temporarily retained to be divided into a temporary retention passage serving as a passage for discharging from the second discharge port at the other end. The nozzle is characterized in that the internal space and the second discharge port of the temporary residence passage are larger than the internal space and the first discharge port of the fluid discharge passage . The ends of the partition plates on the first discharge port and the second discharge port side are located on the inner side of the first discharge port side end of the lower outer wall portion that forms the fluid discharge passage of the nozzle body. The nozzle according to claim 1 . The fluid discharge passage is formed in a gradually enlarged opening from the inflow port to the front of the first discharge port, and is formed in a gradually reduced opening from the front of the first discharge port to the first discharge port. Item 3. The nozzle according to item 1 or 2 . The nozzle body includes a shielding plate on an upper outer wall portion inclined to both sides from the top so as to protrude forward from the first discharge port and the second discharge port. Nozzle. The nozzle according to claim 4, wherein the shielding plate is a plate member made of synthetic resin and having flexibility .

Images