JP2021160005A - Coolant nozzle, grinding device, and grinding method - Google Patents

Abstract

To provide a coolant nozzle which can stably supply a coolant to a grind stone from a desired direction without needing complicated processing and adjustment, and to provide a grinding device using the coolant nozzle and a grinding method.SOLUTION: A coolant nozzle 13 includes: a resin nozzle body 21 formed in a ring shape with an axis set to its center; and a pair of first frame body 23 and second frame body which sandwiches and fixes the nozzle body 21 in an axial direction. The nozzle body 21 has an inner opening on an inner peripheral surface of the ring and has an outer opening on an outer peripheral surface of the ring. Through hole 27 each of which allows the inner opening and the outer opening to communicate with each other are formed along a circumferential direction of the nozzle body 21.SELECTED DRAWING: Figure 4

Description

The present invention relates to a coolant nozzle, a grinding device and a grinding method.

When the work is ground with a grindstone, coolant is supplied to the sliding contact portion between the grindstone and the work. The coolant is discharged toward the grindstone from a coolant nozzle having a plurality of discharge portions arranged so as to face the sliding contact portion between the grindstone and the work (Patent Document 1).

This type of coolant nozzle is a flexible type that allows the hose to bend and the coolant discharge direction to be freely changed. There are types and so on.

Japanese Unexamined Patent Publication No. 5-138520

The flexible type coolant nozzle can discharge the coolant in a desired direction by adjusting the angle of the nozzle tip, but the discharge direction is liable to fluctuate because the nozzle body is flexible. Therefore, the state of supplying coolant to the grindstone may become unstable.
On the other hand, in the metal processing type coolant nozzle, a plurality of discharge portions can be formed with the same shape and the same angle, and the coolant discharge direction can be set accurately. However, in order to form the nozzle with high precision, precision processing is required and the manufacturing cost is high. In addition, complicated processing and adjustment are required to control the flow of coolant, which makes manufacturing difficult.

An object of the present invention is to provide a coolant nozzle capable of stably supplying coolant to a grindstone from a desired direction without requiring complicated processing or adjustment, and a grinding device and a grinding method using the coolant nozzle. ..

The present invention has the following configuration.
(1) A resin nozzle body formed in an annular shape around the axis and
A pair of frames that sandwich and fix the nozzle body in the direction of the axis, and
With
The nozzle body has an inner opening on the inner peripheral surface of the ring and an outer opening on the outer peripheral surface of the ring.
A coolant nozzle characterized in that a plurality of through holes communicating from an inner opening to an outer opening are formed along the circumferential direction of the nozzle body.
(2) A grinding device that grinds a workpiece by rotating a grindstone.
A grinding apparatus according to (1), wherein the coolant nozzle is arranged on the outer periphery of the grindstone, and coolant is supplied along the outer peripheral surface of the grindstone.
(3) A grinding method that grinds a workpiece by rotating a grindstone.
A grinding method in which the coolant nozzle according to (1) is arranged on the outer periphery of the grindstone and coolant is supplied along the outer peripheral surface of the grindstone.

According to the present invention, the coolant can be stably supplied to the grindstone from a desired direction without requiring complicated processing or adjustment.

FIG. 1 is a schematic perspective view of a grinding device according to the present invention. FIG. 2 is a process explanatory view schematically showing a state at the time of workpiece grinding with a grindstone. FIG. 3 is a perspective view of the coolant nozzle shown by cutting out a part. FIG. 4 is an exploded perspective view of the coolant nozzle. FIG. 3 is a sectional view taken along line VV of the coolant nozzle shown in FIG. FIG. 6 is a plan view of the nozzle body as viewed from the axial direction. FIG. 7 is a cross-sectional view taken along the line VII-VII of the nozzle body shown in FIG. FIG. 8 is a schematic explanatory view showing how the coolant is discharged from the through hole of the nozzle body toward the outer peripheral surface of the grindstone.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic perspective view of a grinding device 100 according to the present invention.
The grinding apparatus 100 includes a grindstone 11, a coolant nozzle 13, and an apparatus main body 15. Coolant is supplied to the coolant nozzle 13 from the coolant supply unit (see FIG. 2).

The coolant nozzle 13 will be described in detail later, but as shown in FIG. 5, the coolant nozzle 13 is formed in an annular shape about the axis Ax, and the nozzle body 21 having a resin member and the nozzle body 21 are sandwiched and fixed in the direction of the axis Ax. It includes a pair of frames, a first frame 23 and a second frame 25.

The nozzle body 21 made of a resin member has an inner opening 27a on the inner peripheral surface of the ring and an outer opening 27b on the outer peripheral surface of the ring. A plurality of through holes 27 communicating from the inner opening 27a to the outer opening 27b are formed along the circumferential direction of the nozzle body 21.

According to the coolant nozzle 13, since the through hole 27 is formed in the resin member, the processing of the through hole 27 becomes easier than in the case of processing the metal material, and the shape and size of the through hole 27 can be freely changed. .. Therefore, it becomes easy to adjust the coolant to a desired discharge flow. Further, since the first frame body 23 and the second frame body 25 sandwich and fix the nozzle body 21, the nozzle body 21 can be reinforced and stable positioning can be performed. Further, since the nozzle body 21 is detachable from the first frame body 23 and the second frame body 25, the nozzle body 21 can be easily cleaned. In addition, the deterioration of nozzle performance due to dirt, clogging, deterioration over time, etc., which is difficult to remove, can be easily dealt with by replacing the resin member.

An example of the grinding apparatus 100 including the coolant nozzle 13 having the above configuration will be described in detail below.
As shown in FIG. 1, the apparatus main body 15 of the grinding apparatus 100 includes a motor 31, a nozzle support portion 33, an XY moving mechanism 35, and a Z moving mechanism (not shown). Here, the vertical direction shown in FIG. 1 is also referred to as a Z direction, the front-back direction is referred to as a Y direction, and the direction orthogonal to the X direction and the Y direction is also referred to as an X direction.

The motor 31 is provided on the front surface of the apparatus main body 15 and rotates the grindstone 11 fixed to the lower end portion of the main shaft 37. The motor 31 is movably supported by the apparatus main body 15 in the Z direction by a Z moving mechanism (not shown).

The nozzle support portion 33 extends from the front surface of the apparatus main body 15 toward the main shaft 37, and the coolant nozzle 13 is fixed to the tip portion thereof. The coolant nozzle 13 is arranged on the motor 31 side above the grindstone 11 and is provided concentrically with the main shaft 37.

The XY movement mechanism 35 includes a Y stage 41 that moves the device main body 15 in the Y direction, and an X stage 43 that integrally moves the device main body 15 and the Y stage 41 in the X direction. As a result, the grindstone 11 can move back and forth (Y direction), left and right (X direction), and up and down (Z direction) within a predetermined movable range driven by the XY movement mechanism 35 and the Z movement mechanism (not shown). It becomes.

FIG. 2 is a process explanatory view schematically showing a state at the time of workpiece grinding by the grindstone 11.
A work table 45 is provided in front of the grinding device 100. A plate-shaped work W such as a glass plate is set on the work table 45. The grinding device 100 grinds the end face Wa of the work W by rotationally driving the grindstone 11 and moving it along the end face Wa of the work W. During the grinding, the coolant C is discharged from the coolant nozzle 13 and supplied to the grindstone 11. The coolant C is supplied from the coolant supply unit 47 to the coolant nozzle 13 through the coolant supply pipe 49.

Although details will be described later, the through hole 27 formed in the nozzle body 21 of the coolant nozzle 13 is set in a discharge direction and a discharge angle so that the coolant C can be discharged toward the outer peripheral surface of the grindstone 11.

Next, a specific configuration example of the coolant nozzle 13 will be described.
FIG. 3 is a perspective view of the coolant nozzle 13 shown by cutting out a part thereof. FIG. 4 is an exploded perspective view of the coolant nozzle 13.

As shown in FIGS. 3 and 4, the coolant nozzle 13 is a first frame 23, which is a pair of an annular nozzle body 21 and a pair of annular frames that sandwich and fix the nozzle body 21 in the axial direction Ax direction. And a second frame body 25. The nozzle body 21, the first frame body 23, and the second frame body 25 are arranged concentrically about the axis Ax.

The nozzle body 21 is entirely composed of a resin member made of a resin material. As the resin material, for example, a resin material having good moldability and processability such as a photocurable resin and a thermosetting resin can be adopted, and a resin that can be used in a 3D printer that enables a particularly complicated design is particularly preferable. A photocurable resin is preferable. Further, a plurality (at least 10) through holes 27 are formed in the nozzle body 21 along the circumferential direction. As a result, a necessary and sufficient flow rate of coolant can be obtained. Further, it is preferable that the through holes 27 are arranged at equal intervals in the circumferential direction, and in that case, a more uniform coolant flow can be formed in the circumferential direction.

The number of through holes 27 is preferably 15 or more, more preferably 20 or more. The distance between adjacent through holes 27 is 1.5 times or more, preferably 2 times or more, and more preferably 2.5 times or more the diameter of the through holes 27. The arrangement of the through holes 27 in the circumferential direction is not only at equal intervals, but also in a configuration in which through hole groups in which a plurality of through holes 27 are arranged are distributed and arranged at a plurality of locations in the circumferential direction, that is, between the through hole groups. May have a configuration having a region in which a through hole is not formed.

The first frame body 23 is formed with a plurality of (four in FIG. 3) coolant inflow ports 51 that take in the coolant C supplied through the coolant supply pipe 49 (FIG. 2) into the coolant nozzle 13. A joint member 53 for connecting the coolant supply pipe 49 is attached to the coolant inflow port 51.

Further, the first frame body 23 and the second frame body 25 are provided with a plurality of bolt holes 55 and 57 penetrating in the axis Ax direction. By inserting bolts (not shown) into the bolt holes 55 and 57 and fastening them, the nozzle body 21 is detachably fixed between the first frame body 23 and the second frame body 25.

The first frame body 23 and the second frame body 25 are made of a material having a higher strength than the resin material of the nozzle body 21 such as a metal such as a steel material, ceramics, a hard resin, and a fiber reinforced resin.

FIG. 5 is a sectional view taken along line VV of the coolant nozzle 13 shown in FIG.
The first frame body 23 has a cylindrical portion 23a along the axis Ax and an annular flange portion 23b connected to one end portion (upper end portion in FIG. 5) of the cylindrical portion 23a and extending radially outward. The second frame body 25 has a cylindrical portion 25a along the axis Ax and an annular flange portion 25b connected to one end portion (lower end portion in FIG. 5) of the cylindrical portion 25a and extending inward in the radial direction.

The first frame body 23 and the second frame body 25 define a closed space 61 by the cylindrical portions 23a and 25a and the flange portions 23b and 25b, respectively, by sandwiching the nozzle body 21 in the direction of the axis Ax. The closed space 61 is formed so as to cover the outer opening 27b of the through hole 27 of the nozzle body 21. The closed space 61 communicates with the coolant inflow port 51, and the coolant supplied from the coolant inflow port 51 is temporarily stored in the closed space 61 and discharged from the inner opening 27a through the through hole 27. As a result, the coolant can be stably flowed through the through hole 27.

Further, stepped portions 65 and 67 are formed on the joint surface between the first frame body 23 and the nozzle body 21 and the joint surface between the second frame body 25 and the nozzle body, respectively. The stepped portions 65 and 67 prevent the coolant from leaking and position the nozzle body 21 on the first frame body 23 and the second frame body 25.

That is, in the coolant nozzle 13 having this configuration, the coolant flow path is from the coolant inflow port 51 through the closed space 61 to the inner opening 27a of the through hole 27. By providing the coolant inflow ports 51 at a plurality of locations, the pressure of the coolant in the closed space 61 can be made uniform in the circumferential direction of the coolant nozzle 13. Therefore, the discharge pressure of the coolant discharged from the through hole 27 can be made uniform.

FIG. 6 is a plan view of the nozzle body 21 as viewed from the axial direction.
The through hole 27 of the nozzle body 21 is arranged at a position where the inner opening 27a and the outer opening 27b are displaced from each other in the circumferential direction. Therefore, the axis L1 of the through hole 27 in the plan view and the radius line L2 along the radial direction of the nozzle body 21 in the outer opening 27b intersect at an angle θ1.

FIG. 7 is a cross-sectional view taken along the line VII-VII of the nozzle body 21 shown in FIG.
In the axial cross section of FIG. 7, the nozzle body 21 has the axis L3 of the through hole 27 intersecting the axial vertical surface 69 at an angle θ2.

Therefore, as shown in FIG. 2, the coolant from the through hole 27 is inclined downward at an angle θ2 from the axial vertical surface 69 of the nozzle body 21 arranged on the motor 31 side in the axial direction Ax direction from the grindstone 11. It is discharged. As a result, the coolant can be accurately supplied toward the machining position of the work W.

FIG. 8 is a schematic explanatory view showing how the coolant is discharged from the through hole of the nozzle body toward the outer peripheral surface of the grindstone.
Then, as shown in FIG. 8, the coolant C from the through hole 27 is inclined and discharged at an angle θ1 to supply the coolant C to the grindstone 11 from the tangential direction of the outer peripheral surface of the grindstone 11 or from a direction close to the tangential direction. Will be done. Then, on the outer peripheral surface of the grindstone 11, a coolant flow CF is formed in which the supplied coolant C flows in the same direction as the rotation direction so as to surround the entire circumference of the grindstone 11.

This coolant flow CF ensures that the air at the machining point of the work W is blocked so that the machining point is always covered with the coolant C. As a result, the supply and discharge of the coolant C at the machining point becomes smooth, and the new liquid of the coolant is stably and continuously supplied to the machining point. As a result, the ground surface of the work W can be finished with a highly accurate surface texture.

According to the coolant nozzle 13 having this configuration, when the rotating grindstone 11 is moved along the end face Wa of the work W to grind the end face Wa of the work W, the coolant flow CF that flows around the entire circumference of the grindstone 11 Can be formed stably. Therefore, the coolant C is always stably present on the entire circumference of the grindstone 11, and high-quality grinding is possible. Further, since the nozzle body 21 is made of resin, the manufacturing cost can be reduced. Further, since the first frame body 23 and the second frame body 25 for reinforcing the nozzle body 21 are provided, there is no problem of insufficient strength due to the nozzle body 21 being made of resin.

Further, when the nozzle body 21 is modeled by, for example, a three-dimensional modeling method using a photocurable resin, the nozzle body 21 having a complicated structure having a plurality of through holes 27 is relatively obtained from design data (CAD data, etc.). It can be manufactured easily and accurately. Therefore, various parameters such as the dimensions, shape, and angles θ1 and θ2 of the through hole 27 can be set with high accuracy.

Further, the first frame body 23 and the second frame body 25 are composed of a pair of upper and lower annular members that are fitted to each other, and the nozzle body 21 is sandwiched between the first frame body 23 and the second frame body 25 in the uniaxial direction. It is fixed integrally in the state of being closed. Therefore, the nozzle body 21 can be easily removed from the first frame body 23 and the second frame body 25 by releasing the fitting between the first frame body 23 and the second frame body 25. Therefore, the work such as cleaning and replacement of the nozzle body 21 is not complicated.

As described above, the present invention is not limited to the above-described embodiment, and can be modified or applied by those skilled in the art based on the combination of the configurations of the embodiments with each other, the description of the specification, and the well-known technique. This is also the subject of the present invention and is included in the scope for which protection is sought.

For example, in the above embodiment, the nozzle body is manufactured by three-dimensional modeling with a photocurable resin, but the resin material may be manufactured by machining such as cutting or drilling.

Further, in the above embodiment, the nozzle body 21, the first frame body 23, and the second frame body 25 are formed in an annular shape, but the shape is other than the annular shape such as a rectangle, a rhombus, a triangle, or a polygon. May be good. Further, the nozzle body 21 is not limited to the one integrally molded, and may be formed by combining a plurality of molded members.

As described above, the following matters are disclosed in this specification.
(1) A resin nozzle body formed in an annular shape around the axis and
A pair of frames that sandwich and fix the nozzle body in the direction of the axis, and
With
The nozzle body has an inner opening on the inner peripheral surface of the ring and an outer opening on the outer peripheral surface of the ring.
A coolant nozzle characterized in that a plurality of through holes communicating from an inner opening to an outer opening are formed along the circumferential direction of the nozzle body.
According to this coolant nozzle, the coolant can be stably supplied in a desired direction without requiring complicated processing and adjustment. Further, since the nozzle body is made of resin, the manufacturing cost is low, and since the nozzle body has a frame body for reinforcing the nozzle body, there is no problem of insufficient strength due to the nozzle body being made of resin.

(2) The coolant nozzle according to (1), wherein the frame is made of metal.
According to this coolant nozzle, the nozzle body can be reliably protected by sandwiching the nozzle body between metal frames.

(3) The coolant nozzle according to (1) or (2), wherein the nozzle body is a photocurable resin.
According to this coolant nozzle, by forming the nozzle body using a photocurable resin, the nozzle body can be manufactured with good moldability and workability.

(4) The coolant nozzle according to any one of (1) to (3), wherein the plurality of through holes are arranged at equal intervals in the circumferential direction.
According to this coolant nozzle, a more uniform coolant flow can be obtained in the circumferential direction.

(5) The coolant nozzle according to any one of (1) to (4), wherein at least 10 of the through holes are formed.
According to this coolant nozzle, a necessary and sufficient coolant flow rate can be obtained.

(6) The coolant nozzle according to any one of (1) to (5), wherein the pair of frames define a closed space covering the outer opening of the through hole.
According to this coolant nozzle, the closed space becomes a pool of coolant, and the coolant stably flows into the through hole.

(7) The coolant nozzle according to (6), wherein a plurality of coolant supply ports for supplying coolant to the closed space are provided in at least one of the pair of the frames.
According to this coolant nozzle, the coolant can be stably supplied from the coolant supply port to the closed space, and the discharge pressure of the coolant discharged from the through hole can be made uniform.

(8) The nozzle body has an annular shape.
The coolant nozzle according to any one of (1) to (7), wherein the plurality of through holes are inclined at the same angle from the radial direction of the nozzle body to the circumferential direction.
According to this coolant nozzle, coolant can be supplied to the outer circumference of a tool such as a grindstone in the same rotation direction.

(9) The coolant nozzle according to any one of (1) to (8), wherein the nozzle body is detachably provided on the pair of the frame bodies.
According to this coolant nozzle, the nozzle body can be easily cleaned and replaced.

(10) A grinding device that grinds a workpiece by rotating a grindstone.
A grinding apparatus according to any one of (1) to (9), wherein the coolant nozzle is arranged on the outer periphery of the grindstone, and coolant is supplied along the outer peripheral surface of the grindstone.
According to this grinding device, the coolant supplied from the coolant nozzle toward the outer periphery of the grindstone forms a coolant flow surrounding the entire circumference of the grindstone. With this coolant flow, the ground surface can be finished with a highly accurate surface texture.

(11) A grinding method in which a grindstone is rotated to grind a workpiece.
A grinding method in which the coolant nozzle according to any one of (1) to (9) is arranged on the outer periphery of the grindstone, and coolant is supplied along the outer peripheral surface of the grindstone.
According to this grinding method, the coolant supplied from the coolant nozzle toward the outer periphery of the grindstone forms a coolant flow surrounding the entire circumference of the grindstone. With this coolant flow, the ground surface can be finished with a highly accurate surface texture.

(12) The grinding method according to (11), wherein the discharge direction of the coolant discharged from the coolant nozzle is set to the tangential direction of the outer peripheral surface of the grindstone.
According to this grinding method, the coolant flow surrounding the entire circumference of the grindstone can be obtained more reliably.

11 Grinding stone 13 Coolant nozzle 15 Equipment body 21 Nozzle body 23 1st frame body 23a Cylindrical part 23b Flange part 25 2nd frame body 25a Cylindrical part 25b Flange part 27 Through hole 27a Inner opening 27b Outer opening 31 Motor 33 Nozzle support part 35 XY Moving mechanism 37 Main shaft 41 Y stage 43 X stage 45 Work table 47 Coolant supply part 49 Coolant supply pipe 51 Coolant inflow port 53 Joint member 55, 57 Bolt hole 61 Closed space 65, 67 Stepped part 69 Axial vertical surface 100 Grinding device C Coolant CF Coolant flow W work

Claims (12)

A resin nozzle body formed in an annular shape around the axis and
A pair of frames that sandwich and fix the nozzle body in the direction of the axis, and
With
The nozzle body has an inner opening on the inner peripheral surface of the ring and an outer opening on the outer peripheral surface of the ring.
A coolant nozzle characterized in that a plurality of through holes communicating from an inner opening to an outer opening are formed along the circumferential direction of the nozzle body. The coolant nozzle according to claim 1, wherein the frame is made of metal. The coolant nozzle according to claim 1 or 2, wherein the nozzle body is a photocurable resin. The coolant nozzle according to any one of claims 1 to 3, wherein the plurality of through holes are arranged at equal intervals in the circumferential direction. The coolant nozzle according to any one of claims 1 to 4, wherein at least 10 of the through holes are formed. The coolant nozzle according to any one of claims 1 to 5, wherein the pair of frames form a closed space covering the outer opening of the through hole. The coolant nozzle according to claim 6, wherein a plurality of coolant supply ports for supplying coolant to the closed space are provided in at least one of the pair of the frames. The nozzle body has an annular shape.
The coolant nozzle according to any one of claims 1 to 7, wherein the plurality of through holes are inclined at the same angle from the radial direction of the nozzle body to the circumferential direction. The coolant nozzle according to any one of claims 1 to 8, wherein the nozzle body is detachably provided on the pair of frames. A grinding device that grinds a workpiece by rotating a grindstone.
A grinding apparatus according to any one of claims 1 to 9, wherein the coolant nozzle is arranged on the outer periphery of the grindstone, and coolant is supplied along the outer peripheral surface of the grindstone. It is a grinding method that grinds a workpiece by rotating a grindstone.
A grinding method in which the coolant nozzle according to any one of claims 1 to 9 is arranged on the outer periphery of the grindstone, and coolant is supplied along the outer peripheral surface of the grindstone. The grinding method according to claim 11, wherein the discharge direction of the coolant discharged from the coolant nozzle is set to the tangential direction of the outer peripheral surface of the grindstone.

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