WO2021066158A1 - Grinding wheel flange and grinding wheel - Google Patents

Abstract

The present disclosure is a grinding wheel flange (10) that clamps a grinding wheel (T), and that is formed from carbon fiber reinforced plastic.

Description

Grinding wheel flange and grinding wheel

This disclosure relates to a grindstone flange and a grinding wheel. This application claims priority based on Japanese Patent Application No. 2019-182641 filed in Japan on October 3, 2019, the contents of which are incorporated herein by reference.

Patent Document 1 below discloses a portable grinding machine in which a grindstone is sandwiched between a fixing side flange and a tightening side flange and fixed to a grindstone shaft (see FIG. 2 and the like).
Further, Patent Document 2 below discloses a machine tool for fixing a grindstone to a tool rotating shaft via a holder including a pair of flanges and an end face seal (see FIGS. 1 and 2 and the like). The pair of flanges and end face seals firmly hold the grindstone by being tightened with fixing bolts.

Japanese Patent Application Laid-Open No. 07-068464 Japanese Patent No. 5520795

By the way, the fixed side flange and the tightening side flange in the above-mentioned portable grinding machine, and the pair of flanges in the above-mentioned machine tool are grindstone flanges formed by processing a steel material for the purpose of ensuring sufficient mechanical strength. .. Such a grindstone flange is detachably attached to a rotating shaft such as a grindstone shaft or a tool rotating shaft as a grinding wheel integrated with the grindstone.

However, the grinding wheel for machine tools in particular is relatively large, and depending on the object, it weighs as much as 20 kg. Therefore, the replacement workability of the grinding wheel is poor, and the replacement of the grinding wheel is a factor that impairs the workability of the grinding work at the manufacturing site.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a grindstone flange and a grinding wheel that can reduce the weight while ensuring mechanical strength.

In order to achieve the above object, the grindstone flange of the first aspect of the present disclosure is a grindstone flange that sandwiches the grindstone and is formed of carbon fiber reinforced plastic.

The second aspect of the present disclosure is the grindstone flange of the first aspect that sandwiches the annular grindstone having a predetermined inner diameter and outer diameter, and hits the grindstone from one of the central axial directions of the grindstone. It includes a first flange made of the carbon fiber reinforced plastic that comes into contact with the grindstone, and a second flange made of the carbon fiber reinforced plastic that comes into contact with the grindstone from the other side.

The third aspect of the present disclosure includes a core metal member in which the first flange and the second flange are screwed in the central axis direction while sandwiching the grindstone in the grindstone flange of the second aspect.

The fourth aspect of the present disclosure is that in the grindstone flange of the third aspect, one of the first flange and the second flange is bolted to the core metal member.

In the fifth aspect of the present disclosure, in the grindstone flange of the second aspect, a weight for adjusting the rotational balance is attached to one of the first flange and the second flange.

In the sixth aspect of the present disclosure, in the grindstone flange of the third aspect, a weight for adjusting the rotational balance is attached to one of the first flange and the second flange.

In the seventh aspect of the present disclosure, in the grindstone flange of the fourth aspect, a weight for adjusting the rotational balance is attached to the other of the first flange and the second flange.

The eighth aspect of the present disclosure is the grindstone flange of the seventh aspect, wherein a plurality of the weights are provided around the central axis of the grindstone.

A ninth aspect of the present disclosure is the grindstone flange according to any one of the second to eighth aspects, wherein the first flange and the second flange have an annular shape having a diameter smaller than that of the grindstone, and the first one. On the outer periphery of the flange and / or the second flange, a protruding portion that protrudes in the direction away from the grindstone in the central axis direction is provided.

The grinding wheel of the tenth aspect of the present disclosure includes a grindstone flange according to any one of the first to ninth aspects and a grindstone.

According to the present disclosure, since it is formed of carbon fiber reinforced plastic instead of the conventional steel material, it is possible to provide a grindstone flange and a grinding wheel that can reduce the weight while ensuring mechanical strength. ..

It is a vertical sectional view of the grindstone flange and the grinding wheel which concerns on one Embodiment of this disclosure. (A) is a left front view of the grindstone flange according to the embodiment of the present disclosure, and (b) is a right front view of the grindstone flange according to the embodiment of the present disclosure.

Hereinafter, one embodiment of the present disclosure will be described with reference to FIGS. 1 and 2 (a) and (b). In addition, in (a) and (b) of FIG. 2, the grindstone T shown in FIG. 1 is omitted for convenience.

The grindstone flange 10 according to the present embodiment has a first flange 1, a second flange 2, a core metal member 3, a washer 4, and a plurality of grindstones, as shown in FIGS. 1 and 2 (a) and 2 (b). It includes a fastening bolt 5, a plurality of core metal fastening bolts 6, a plurality of washer fastening bolts 7, three weights 8, and a weight fastening bolt 9.

The grindstone flange 10 is a substantially annular mechanical component that sandwiches and holds the annular grindstone T from the direction of the central axis L (the left-right direction in FIG. 1), and is mounted concentrically with the grindstone T. That is, the grindstone flange 10 has the same central axis L as the grindstone T. Such a grindstone flange 10 constitutes a grinding wheel 11 together with a grindstone T, and is detachably attached to a machining shaft (rotating shaft) of a machine tool to grind an object while rotating. In FIG. 1, the central axis L of the grindstone T and the grindstone flange 10 coaxial with each other is shown by a alternate long and short dash line.

Further, the grindstone T is a ring-shaped member having a predetermined inner diameter and outer diameter. That is, the grindstone T is formed on an annular inner peripheral surface t1 having an inner diameter, an annular outer peripheral surface t2 parallel to the inner peripheral surface t1 and having the outer diameter, and an inner peripheral surface t1 and an outer peripheral surface t2. It is provided with a pair of end faces t3 and t4 that are orthogonal to each other and have a predetermined interval W. The outer peripheral surface t2 is a grinding surface that abuts on an object and performs grinding.

The first flange 1 is a member made of an annular carbon fiber reinforced plastic (CFRP: Carbon Fiber Reinforced Plastic), and abuts on the abrasive stone T from one of the annular shape abrasive stones T in the central axis direction. That is, the first flange 1 has a ring shape having a diameter smaller than that of the grindstone T, and includes a front surface 1a, a back surface 1b, an inner peripheral surface 1c, a first outer peripheral surface 1d, a second outer peripheral surface 1e, and an outer step surface 1f. ing. The outer diameter of the ring shape of the first flange 1 is smaller than the predetermined outer diameter of the ring shape of the grindstone T, and the inner diameter of the ring shape of the first flange 1 is smaller than the predetermined inner diameter of the ring shape of the grindstone T. small.

The surface 1a is an annular plane, orthogonal to the central axis L, and an annular surface centered on the central axis L. An annular groove portion 1g is formed on the surface 1a. The groove portion 1g is a recessed portion for accommodating the weight 8, and is formed concentrically with respect to the central axis L.

The back surface 1b is an annular plane parallel to the front surface 1a. The inner peripheral end of the back surface 1b has the same distance from the central axis L as the inner peripheral end of the front surface 1a. That is, the back surface 1b is concentric with the surface surface 1a, and the inner diameter is the same as the inner diameter of the front surface 1a.

The inner peripheral surface 1c is a cylindrical curved surface connecting the inner peripheral end of the back surface 1b and the inner peripheral end of the front surface 1a. That is, both ends of the circular inner peripheral surface 1c are concentric with respect to the central axis L and have the same diameter.

The first outer peripheral surface 1d is a cylindrical curved surface concentric with the inner peripheral surface 1c. One end of the first outer peripheral surface 1d is connected to the outer peripheral end of the surface 1a, and the other end is connected to the outer peripheral end of the outer step surface 1f. Further, the first outer peripheral surface 1d has a width slightly shorter than that of the inner peripheral surface 1c in the central axis direction.

The second outer peripheral surface 1e is a cylindrical curved surface concentric with the inner peripheral surface 1c, and has a diameter slightly smaller than that of the first outer peripheral surface 1d. One end of the second outer peripheral surface 1e is connected to the outer peripheral end of the back surface 1b, and the other end is connected to the inner peripheral end of the outer step surface 1f. The second outer peripheral surface 1e abuts on one end surface t3 of the grindstone T as shown in FIG.

The outer step surface 1f is an annular plane parallel to the front surface 1a and the back surface 1b. The outer peripheral end of the outer step surface 1f is connected to the other end of the first outer peripheral surface 1d, and the inner peripheral end is connected to the other end of the second outer peripheral surface 1e. That is, the position of the outer step surface 1f in the central axis direction is slightly closer to the surface 1a than the back surface 1b. As shown in FIG. 1, such an outer step surface 1f comes into contact with the inner peripheral surface t1 of the grindstone T.

A plurality (6) through holes are formed in such a first flange 1 from the front surface 1a to the back surface 1b. These through holes are round holes that are formed around the central axis at predetermined angular intervals and extend in the central axis direction. Such a through hole is for inserting the grindstone fastening bolt 5.

The second flange 2 is an annular carbon fiber reinforced plastic member, and abuts on the grindstone T from the other side in the central axis direction of the grindstone T. That is, the second flange 2 has a ring shape having a diameter smaller than that of the grindstone T, and has a front surface 2a, a back surface 2b, a first inner peripheral surface 2c, a second inner peripheral surface 2d, an inner step surface 2e, and a first outer peripheral surface. It is provided with 2f, a second outer peripheral surface 2g, and an outer step surface 2h. The outer diameter of the ring shape of the second flange 2 is smaller than the predetermined outer diameter of the ring shape of the grindstone T, and the inner diameter of the ring shape of the second flange 2 is smaller than the predetermined inner diameter of the ring shape of the grindstone T. small.

The surface 2a is an annular flat surface. That is, the surface 2a is an annular surface orthogonal to the central axis L and centered on the central axis L. An annular protrusion 2i is formed on the outer circumference of the surface 2a. The protruding portion 2i protrudes in the direction away from the grindstone T in the direction of the central axis of the grindstone T. That is, the projecting portion 2i projects in a direction parallel to the central axis L of the second flange 2, that is, in a direction orthogonal to the first outer peripheral surface 2f orthogonal to the central axis L.

The back surface 2b is an annular plane parallel to the front surface 2a. The distance from the axis of the inner peripheral end of the back surface 2b is slightly closer to the central axis L than the inner peripheral end of the front surface 2a. That is, the back surface 2b is concentric with the surface surface 2a, and the inner diameter is smaller than the inner diameter of the surface 1a on the first flange 1 by the width of the inner step surface 2e (the width in the radial direction orthogonal to the central axis L). ..

The first inner peripheral surface 2c is a cylindrical curved surface connecting the inner peripheral end of the surface 2a and the outer peripheral end of the inner step surface 2e. That is, both ends of the circular surface of the first inner peripheral surface 2c are concentric with respect to the central axis L and have the same diameter.

The second inner peripheral surface 2d is a cylindrical curved surface connecting the inner peripheral end of the back surface 2b and the inner peripheral end of the inner step surface 2e. That is, both ends of the circle of the second inner peripheral surface 2d are concentric with respect to the central axis L and have the same diameter.

The inner step surface 2e is an annular plane parallel to the front surface 2a and the back surface 2b. The outer peripheral end of the inner step surface 2e is connected to the other end of the first inner peripheral surface 2c, and the inner peripheral end is connected to the other end of the second inner peripheral surface 2d. That is, the position of the inner step surface 2e in the central axis direction is located substantially intermediate between the front surface 2a and the back surface 2b.

The first outer peripheral surface 2f is a cylindrical curved surface concentric with the first inner peripheral surface 2c and the second inner peripheral surface 2d. One end of the first outer peripheral surface 2f is connected to the outer peripheral end of the protruding portion 2i, and the other end is connected to the outer peripheral end of the outer step surface 2h. Further, the first outer peripheral surface 2f has a width substantially equal to that of the first inner peripheral surface 2c in the central axis direction.

The second outer peripheral surface 2g is a cylindrical curved surface concentric with the first inner peripheral surface 2c and the second inner peripheral surface 2d, and has a diameter slightly smaller than that of the first outer peripheral surface 2f. One end of the second outer peripheral surface 2g is connected to the outer peripheral end of the back surface 2b, and the other end is connected to the inner peripheral end of the outer step surface 2h. Such a second outer peripheral surface 2g abuts on the other end surface t4 of the grindstone T as shown in FIG.

The outer step surface 2h is an annular plane parallel to the front surface 2a and the back surface 2b. The outer peripheral end of the outer step surface 2h is connected to the other end of the first outer peripheral surface 2f, and the inner peripheral end is connected to the other end of the second outer peripheral surface 2g. That is, the position of the outer step surface 2h in the central axis direction is substantially intermediate between the front surface 2a and the back surface 2b. As shown in FIG. 1, such an outer step surface 2h comes into contact with the inner peripheral surface t1 of the grindstone T.

The second flange 2 is formed with a plurality (6) first through holes that pass from the back surface 2b to the inner step surface 2e. These first through holes are round holes that are formed around the central axis at predetermined angular intervals and extend in the central axis direction. A grindstone fastening bolt 5 is inserted into such a first through hole as shown in the figure.

Further, the second flange 2 is formed with a plurality (6) of second through holes at positions different from the first through holes around the central axis. These second through holes are round holes that are formed around the central axis at predetermined angular intervals and extend in the central axis direction. A core metal fastening bolt 6 is inserted into such a second through hole as shown in the figure.

The core metal member 3 is a metal annular member mounted on the inner circumferences of the first flange 1 and the second flange 2. The core metal member 3 screw-fastens the first flange 1 and the second flange 2 in the direction of the central axis of the grindstone T with the grindstone T sandwiched therein. The core metal member 3 includes a front surface 3a, a back surface 3b, an inner peripheral surface 3c, a first outer peripheral surface 3d, a second outer peripheral surface 3e, and an outer step surface 3f. It has a protruding portion of 3 g.

The surface 3a is an annular flat surface that is flush with the surface 2a of the second flange 2. That is, the surface 3a is an annular surface orthogonal to the central axis L and centered on the central axis L, and is provided on the inner peripheral side of the surface 2a so as to be continuous with the surface 2a.

The back surface 3b is an annular plane parallel to the front surface 3a. The distance from the axis of the inner peripheral end of the back surface 3b is slightly closer to the central axis L than the inner peripheral end of the front surface 3a. That is, the back surface 3b is concentric with the front surface 3a, and the diameter of the inner peripheral end (circular) is smaller than the diameter of the inner peripheral end (circular) of the front surface 3a.

On the back surface 3b, a protruding portion 3g protruding toward the washer 4 side in the axial direction is formed on the outer peripheral side. Further, on the back surface 3b, first screw holes into which the tip portions of the washer fastening bolts 7 are screwed are formed around the central axis at predetermined angular intervals.

The inner peripheral surface 3c is a conical curved surface connecting the inner peripheral end of the front surface 3a and the inner peripheral end of the back surface 3b. That is, the inner peripheral surface 3c is a tapered surface whose diameter is continuously reduced from the inner peripheral end of the front surface 3a to the inner peripheral end of the back surface 3b. The inner peripheral surface 3c forms a conical opening, and as shown by an arrow in FIG. 1, the rotating shaft of the machine tool is inserted from the surface 3a side and comes into contact with the peripheral surface of the rotating shaft.

The first outer peripheral surface 3d is a cylindrical curved surface concentric with the first inner peripheral surface 2c and the first outer peripheral surface 2f of the second flange 2. One end of the first outer peripheral surface 3d is connected to the outer peripheral end of the surface 3a, and the other end is connected to the outer peripheral end of the outer step surface 3f, and abuts on the first inner peripheral surface 2c.

The second outer peripheral surface 3e is a cylindrical curved surface concentric with the second inner peripheral surface 2d and the second outer peripheral surface 2g of the second flange 2, and has a diameter slightly smaller than that of the first outer peripheral surface 3d. One end of the second outer peripheral surface 3e is connected to the outer peripheral surface of the protruding portion 3g, and the other end is connected to the inner peripheral end of the outer step surface 3f, and abuts on the second inner peripheral surface 2d.

The outer step surface 3f is an annular plane parallel to the front surface 3a and the back surface 3b. The outer peripheral end of the outer step surface 3f is connected to the other end of the first outer peripheral surface 3d, and the inner peripheral end is connected to the other end of the second outer peripheral surface 3e. It is in contact.

On such an outer step surface 3f, second screw holes into which the tip portions of the grindstone fastening bolts 5 are screwed are formed around the central axis at predetermined angular intervals. Further, the tip portion of the core metal fastening bolt 6 is screwed onto the outer step surface 3f, and a third screw hole is formed around the central axis at a position different from that of the second screw hole.

The washer 4 is an annular member having a circular opening H formed in the center. In the washer 4, one of a pair of end faces parallel to each other abuts on the back surface 3b of the core metal member 3, and the outer peripheral surface abuts on the inner peripheral surface of the protruding portion 3g. Through holes penetrating the pair of end faces are formed in the washer 4 at predetermined angular intervals around the central axis.

The plurality of grindstone fastening bolts 5 are rod-shaped fastening members having a male screw portion at the tip thereof, and the grindstone T is sandwiched between the first flange 1 and the second flange 2 via the core metal member 3. That is, the grindstone fastening bolt 5 is inserted into the through hole of the first flange 1 and the first through hole of the second flange 2, respectively, and the male screw portion is screwed into the second screw hole of the core metal member 3. The outer step surface 1f of the first flange 1 and one end surface t3 of the grindstone T and the outer step surface 2h of the second flange 2 and the other end surface t4 of the grindstone T are brought into close contact with each other, thereby sandwiching the grindstone T.

The plurality of core metal fastening bolts 6 are rod-shaped fastening members having a male screw portion at the tip, and bolt the second flange 2 to the core metal member 3. That is, the core metal fastening bolt 6 is inserted into the second through hole of the second flange 2, and the male screw portion provided at the tip is screwed into the third screw hole of the core metal member 3 to form the second flange. 2 is fixed to the core metal member 3.

The plurality of washer fastening bolts 7 are rod-shaped fastening members having a male screw portion at the tip, and the washer 4 is bolted to the core metal member 3. That is, the washer fastening bolt 7 is inserted into the second through hole of the second flange 2, and the male screw portion provided at the tip is screwed into the first screw hole of the core metal member 3, thereby inserting the washer 4 into the core metal. It is fixed to the member 3.

The three weights 8 are metal parts that are housed and fixed in the groove 1g of the first flange 1. That is, the weight 8 has a width (dimension in the radial direction) that can be accommodated and fixed in the groove portion 1g, and a length that abuts on the local portion of the annular groove portion 1g around the central axis. Such weights 8 are balancers for adjusting the rotational balance of the grinding wheel, and a plurality (three) of such weights 8 are provided around the central axis. Further, a screw hole is formed in the center of each weight 8.

The three weight fastening bolts 9 are rod-shaped fastening members having a male screw portion at the tip, and fix the weight 8 to the first flange 1. That is, the weight fastening bolt 9 is screwed into the screw hole of the weight 8 to expand the weight 8 in the radial direction so as to be in pressure contact with the groove portion 1g, and thus to be fixed to the first flange 1.

Next, the grinding performance of the grindstone flange 10 and the grinding wheel 11 according to the present embodiment will be described in detail with reference to FIG.

In the grindstone flange 10 according to the present embodiment, the first flange 1 and the second flange 2 are formed of carbon fiber reinforced plastic. This carbon fiber reinforced plastic sufficiently satisfies the mechanical strength required for the first flange 1 and the second flange 2, and has an extremely small specific gravity as compared with the steel material which is a conventional material. The grindstone flange 10 provided with the first flange 1 and the second flange 2 is significantly lighter than the conventional product.

That is, according to the present embodiment, it is possible to provide the grindstone flange 10 and the grinding wheel 11 that can reduce the weight while ensuring the mechanical strength. Further, as a result, it is possible to improve workability in, for example, replacement work of the grinding wheel attached to the machine tool, and thus efficient search work can be realized.

In addition, the conventional technical common sense in the technical field of the grinding wheel is that the grinding accuracy is improved by increasing the weight of the grinding wheel flange. However, in the grinding wheel 11 according to the present embodiment, it is possible to improve the position controllability of the grinding surface by the machine tool by reducing the weight of the grinding wheel flange 10. As a result, according to the present embodiment, it is possible to improve the grinding accuracy contrary to the conventional common general knowledge.

Further, since the grindstone flange 10 according to the present embodiment includes a weight 8 whose position in the groove portion 1g of the first flange 1 can be changed, the weight balance of the grinding wheel 11 can be easily adjusted, and thus the grinding workability is improved. It is possible to make it.

The present disclosure is not limited to the above embodiment, and for example, the following modifications can be considered.
(1) In the above embodiment, both the first flange 1 and the second flange 2 that sandwich the grindstone T are made of carbon fiber reinforced plastic, but the present disclosure is not limited to this. For example, either one of the first flange 1 and the second flange 2 may be made of carbon fiber reinforced plastic. Further, in this case, it is preferable that the first flange 1 of the first flange 1 and the second flange 2 is made of carbon fiber reinforced plastic.

Further, the specific shapes of the first flange 1, the second flange 2, and the core metal member 3 in the above embodiment are merely examples. The shapes of the first flange 1, the second flange 2, and the core metal member 3 may be other shapes as long as they can hold the grindstone T as the minimum necessary function.

(2) In the above embodiment, the grinding wheel 11 mounted on the machine tool has been described, but the present disclosure is not limited to this. The present disclosure may be applied to the portable grinding machine disclosed in Patent Document 1.

(3) In the above embodiment, three weights 8 for adjusting the weight balance of the grinding wheel 11 are provided, but the present disclosure is not limited to this. The number of weights 8 is not limited to three, and the weights 8 may be deleted if necessary.

(4) In the above embodiment, the second flange 2 is fixed to the core metal member 3 by the core metal fastening bolt 6, but the present disclosure is not limited to this. That is, the core metal fastening bolt 6 is not an essential component of the grindstone flange.

According to the present disclosure, since it is formed of carbon fiber reinforced plastic instead of the conventional steel material, it is possible to provide a grindstone flange and a grinding wheel that can reduce the weight while ensuring mechanical strength. ..

T grindstone t1 inner peripheral surface t2 outer peripheral surface t3, t4 end surface 1 first flange 1a front surface 1b back surface 1c inner peripheral surface 1d first outer peripheral surface 1e second outer peripheral surface 1f outer step surface 1g groove 2 second flange 2a front surface 2b back surface 2c 1st inner peripheral surface 2d 2nd inner peripheral surface 2e Inner step surface 2f 1st outer peripheral surface 2g 2nd outer peripheral surface 2h outer step surface 3 Core metal member 3a Surface 3b Back surface 3c Inner peripheral surface 3d 1st outer peripheral surface 3e 2nd outer circumference Surface 3f Outer step surface 3g Protruding part 4 Washer 5 Grinding stone fastening bolt 6 Core metal fastening bolt 7 Seat metal fastening bolt 8 Weight 9 Weight fastening bolt 10 Grinding flange 11 Grinding grindstone

Claims (10)

1. A grindstone flange that holds the grindstone in between
   A grindstone flange made from carbon fiber reinforced plastic.
2. The grindstone flange according to claim 1, which sandwiches the annular grindstone having a predetermined inner and outer diameters.
   A first flange made of carbon fiber reinforced plastic that abuts on the grindstone from one of the central axial directions of the grindstone,
   A second flange made of carbon fiber reinforced plastic that abuts on the grindstone from the other side in the central axis direction,
   The grindstone flange according to claim 1.
3. The grindstone flange according to claim 2, further comprising a core metal member for screwing the first flange and the second flange in the central axis direction while sandwiching the grindstone.
4. The grindstone flange according to claim 3, wherein one of the first flange and the second flange is bolted to the core metal member.
5. The grindstone flange according to claim 2, wherein a weight for adjusting the rotational balance is mounted on one of the first flange and the second flange.
6. The grindstone flange according to claim 3, wherein a weight for adjusting the rotational balance is mounted on one of the first flange and the second flange.
7. The grindstone flange according to claim 4, wherein a weight for adjusting the rotational balance is mounted on the other of the first flange and the second flange.
8. The grindstone flange according to claim 7, wherein a plurality of the weights are provided around the central axis of the grindstone.
9. The first flange and the second flange have an annular shape having a diameter smaller than that of the grindstone, and the outer periphery of the first flange and / and the second flange is in a direction away from the grindstone in the central axis direction. The grindstone flange according to any one of claims 2 to 8, wherein a protruding portion is provided.
10. The grindstone flange according to any one of claims 1 to 9 and
    With a whetstone
    Equipped with a grinding wheel.

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