WO2007097115A1

WO2007097115A1 - Brush-like grindstone

Info

Publication number: WO2007097115A1
Application number: PCT/JP2007/000084
Authority: WO
Inventors: Tatsuo Shinoda; Mari Arima
Original assignee: Xebec Technology Co., Ltd.; Taimei Chemicals Co., Ltd.
Priority date: 2006-02-20
Filing date: 2007-02-14
Publication date: 2007-08-30
Also published as: TW200732092A; AU2007218875A1; CN101384399A; EP1987921A1; JP5238488B2; JPWO2007097115A1; KR20080109718A; US20100041324A1; CA2642492A1

Abstract

A brush-like grindstone (1) has threadlike grinding elements (2) each being a thread that is a collection of long inorganic fibers and is impregnated with resin and solidified. To grind work (W), the grindstone (1) is moved relative to the work (W) with the forward ends of the threadlike grinding elements (2) pressed against the work (W). In order to prevent the grinding elements (2) from breaking, each threadlike grinding element (2) is curved from its base end to its forward end with high hardness of the grinding elements (2) maintained. Also, the grinding elements (2) are formed in an elliptic or oblong cross-sectional shape whose minor axis is aligned with the direction of the curve. Therefore, the grinding elements (2) have extremely high rigidity in the direction perpendicular to the direction of the curve but they easily deform in the direction of the curve. Consequently, the grinding elements (2) softly engages the work (W) at their forward ends and, when excessive force acts on the elements (2), the brush-like grindstone (1) does not break because the elements (2) deform to absorb the force.

Description

Specification

Brush-like grinding wheel

Technical field

[0001] The present invention relates to a brush-like grinding wheel for deburring and grinding.

Background art

[0002] Precision parts used for automotive parts and aircraft parts are mainly NC lathes, NC fleece, machining centers, robots, dedicated machine tools, etc. using tools such as end mills, drills, dies and taps. It is manufactured with precision and high precision by the automatic machine of In addition, the frames of electronic devices are manufactured by die-cast magnesium or aluminum. These workpieces are ground using a nylon brush with abrasives, a brass brush, a wire brush, etc. to remove scratches, tool marks, burrs and the like. However, the abrasive brushed nylon brush, brass brush, and wire brush have weak abrasive power due to low abrasive content, low hardness, and weak stiffness, so grinding can not be performed efficiently. There is a problem.

[0003] Therefore, the applicant of the present application has held, in a holder, a plurality of linear bodies obtained by impregnating and curing a binder resin in an aggregated yarn of alumina fibers, silicon carbide fibers, carbon fibers, silicon nitride fibers, and glass fibers. We propose a brush-like grinding wheel. A brush-like grindstone using such inorganic long fibers has high hardness and high rigidity, so it has high grinding ability and a long life (for example, see Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 2 0 0 0 _ 9 4 3 4 4

Disclosure of the invention

Problem that invention tries to solve

However, even with the brush-like grinding wheel disclosed in Patent Document 1, in the case of a work having irregularities on the surface, deburring to the corners of the recess is possible only by moving the brush-like grinding wheel along the surface of the work. And can not do grinding. After all, If the brush-like grindstone is moved while the brush-like grindstone is strongly pressed against the work, there is a problem that the inorganic long fibers used for the brush-like grindstone are frequently broken due to high hardness.

[0005] In view of the above problems, it is an object of the present invention to provide a linear abrasive having a high hardness obtained by impregnating and solidifying a resin in an inorganic long fiber aggregate yarn. It is an object of the present invention to provide a brush-like grindstone which can be prevented from being broken.

Means to solve the problem

[0006] In order to solve the above problems, in the present invention, a plurality of linear abrasives obtained by impregnating and solidifying a resin in a collection yarn of inorganic long fibers are used in a brush-like grinding stone held by a holder. Each of the plurality of linear abrasives is characterized in that it is curved at at least one location from the proximal side to the distal side.

In the present invention, each of the plurality of linear abrasives is preferably curved from the proximal end side to the entire distal end side.

In the brush-like grindstone of the present invention, the workpiece is moved relative to the workpiece while the tip of the linear abrasive material is pressed against the workpiece. Here, since linear abrasives are formed by impregnating and solidifying resin into aggregated filaments of inorganic filaments, the density of the inorganic filaments substantially functioning as an abrasive is high, and the hardness is high. It is also strong. Therefore, the brush-like grindstone of the present invention has high grinding ability. Further, in the present invention, the linear abrasive is in a curved state even when the brush-like grindstone is stopped, and is easily deformed in the bending direction. Therefore, in the brush-like grindstone according to the present invention, the linear abrasive has a soft contact with the work of the tip portion as compared with the brush-like grindstone in which the linear abrasive extends linearly, and the excessive amount thereof. It does not break because it deforms when a force is applied and absorbs an excessive force.

In the present invention, it is possible to adopt a configuration in which each of the plurality of linear abrasives radially extends from an outer peripheral side surface of the holder and is curved in the same circumferential direction.

In the present invention, each of the plurality of linear abrasives radially extends from an outer peripheral side surface of the holder, and is curved toward one side in the axial direction of the holder. Can be adopted.

[001 1] In the present invention, a plurality of the holders are arranged in the axial direction of the holder.

A configuration in which the plurality of linear abrasives are held in each of the plurality of holders can be employed.

In the present invention, the holders are arranged in the axial direction of the two holders in pairs, and the plurality of linear abrasives are radially emitted from the outer circumferential surfaces of the two holders. It is possible to adopt a configuration in which the tips of the plurality of linear abrasives held by the two holders extend and are curved in the direction in which they approach each other.

In the present invention, each of the plurality of linear abrasives extends in the axial direction from one end surface in the axial direction of the holder, and curves from the inside to the outside of the one end surface. Can be adopted.

In the present invention, each of the plurality of linear abrasives extends in the axial direction from the one end surface in the axial direction of the holder, and curves inward from the outer side of the one end surface. Can be adopted.

In the present invention, preferably, the plurality of linear abrasives are held in a plurality of bundles in the holder. Such a configuration has the advantage of efficiently discharging swarf at the time of grinding, and having a high force, high heat dissipation effect, and the like. In addition, since a plurality of linear abrasives are divided and fixed to the holder, the linear abrasives can be prevented from coming off. Therefore, the brush-like grinding wheel according to the present invention has the advantage of high safety.

In the present invention, the plurality of linear abrasives are held over the entire circumferential direction in a circumferential groove formed on one end surface or outer circumferential side surface of the holder. May be

In the present invention, preferably, the plurality of linear abrasives have an elliptical or oval cross section with the minor axis in the bending direction. With this configuration, when the linear abrasive is subjected to an excessive force, it deforms and absorbs the excessive force, so it does not break. In the present invention, preferably, a rotational drive shaft extends from the holder in the axial direction. With this configuration, it is possible to drive the brush-like grindstone simply by connecting the drive shaft to the drive device.

In the present invention, as the inorganic long fibers, alumina fibers, silicon carbide fibers

Carbon fiber, silicon nitride fiber, glass fiber, etc. can be used.

Brief description of the drawings

[FIG. 1] (A), (B) and (C) are a perspective view, a plan view, and a linear abrasive used for the brush-like grindstone according to Embodiment 1 of the present invention. It is explanatory drawing which shows the cross section of material typically.

[FIG. 2] (A), (B) are a perspective view and a side view of a brush-like grinding stone according to Embodiment 2 of the present invention.

[FIG. 3] (A) and (B) are a perspective view and a side view of a brush-like grinding stone according to Embodiment 3 of the present invention.

[FIG. 4] (A) and (B) are a perspective view and a plan view of a brush-like grinding stone according to Embodiment 4 of the present invention.

[FIG. 5] (A) and (B) are a perspective view and a side view of a brush-like grinding stone according to Embodiment 5 of the present invention.

FIG. 6 is a side view of a brush-like grinding stone according to Embodiment 6 of the present invention.

FIG. 7 is an explanatory view showing a usage example of a brush-like grinding stone according to Embodiment 6 of the present invention.

FIG. 8 is an explanatory view showing a brush-like grinding stone according to a modification of the sixth embodiment of the present invention and an example of use thereof.

[FIG. 9] (A), (B) are a plan view and a side view of a brush-like grinding stone according to Embodiment 7 of the present invention.

FIG. 10 is an explanatory drawing showing an example of use of a brush-like grinding stone according to Embodiment 7 of the present invention.

[FIG. 11] (A) and (B) are a plan view and a side view of a brush-like grindstone according to Embodiment 8 of the present invention. FIG. 12 is an explanatory drawing showing an example of use of the brush-like grinding stone according to Embodiment 8 of the present invention.

FIG. 13 is an explanatory view of a brush-like grindstone to which the present invention is applied, in the case of using a linear abrasive curved at one point from the base end side to the tip end side.

FIG. 14 is an explanatory view of another example using a linear abrasive that is curved at one point from the base end side to the tip side in the brush-like grindstone to which the present invention is applied.

Explanation of sign

[0021] 1 Brush-like grinding wheel

2 linear abrasive

5 holder

2 0 abrasive bundle

5 1 Shaft hole of holder

5 3 embedded holes

5 5 rotary drive shaft

5 7 Outer peripheral side of holder

5 9 One end face of the holder

W work

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the number of linear abrasives, abrasive bundles and the like are reduced to facilitate understanding of the configuration of each member.

[Embodiment 1]

1 (A), (B), and (C) are a perspective view, a plan view, and a cross-sectional view of a linear abrasive used in the brush-like grindstone according to Embodiment 1 of the present invention. FIG. 5 is an explanatory view schematically showing. The brush-like grindstone 1 shown in FIGS. 1 (A) and 1 (B) is held by a metal holder 5 with a plurality of linear abrasives 2 formed by impregnating and solidifying resin in a collection yarn of inorganic long fibers. It has a structure. The holder 5 has a cylindrical shape with a central axial hole 51 passing through in the axial direction, and a screw (not shown) fixed from the side Therefore, the rotary drive shaft 5 5 inserted in the shaft hole 5 1 is connected to the holder 5

In the present embodiment, the linear abrasive 2 is a collection yarn of alumina long fibers as an inorganic long fiber, and a silicone resin, a phenol resin, an epoxy resin, a polyimide resin, a polymaleimide resin, an unsaturated polyester resin, a urethane It is impregnated with a thermosetting binder resin such as resin and cured. As the binder resin, a thermoplastic resin such as nylon may be used. As a collecting yarn, for example, an alumina long fiber having a fiber diameter of 8 to 5 O jU m is collected by using 250 to 300 fibers, and the diameter of the collecting yarn is 0.1 to 2 countries. It is. As the aggregate yarn, yarn without twist is used.

In the brush-like grindstone 1 of the present embodiment, a plurality of embedded holes 53 are formed at equal angular intervals on the outer peripheral side surface 5 7 of the holder 5. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the base end side is silicone resin-based, It is fixed by an adhesive such as epoxy resin. Therefore, a plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. Even in the state where the abrasive bundle 20 is used, the plurality of linear abrasives 2 are in an independent state.

Here, in each of the linear abrasives 2, the entire area from the proximal end to the distal end is curved toward one side in the circumferential direction, for example, clockwise in the clockwise direction, and along with that, the abrasives The entire bundle 20 is also curved in the clockwise direction CW. Further, as shown in FIG. 1 (C), the linear abrasive 2 is provided with an elliptical or oval cross-sectional shape in which the minor axis is directed in the bending direction.

When deburring work W or grinding for flattening the surface, etc., using the brush-like grindstone 1 of the present embodiment, the drive shaft 55 is connected to the drive device of the grinding machine. And, as shown in Fig. 1 (A) and (B), it is rotated around the axis L in the direction opposite to the curving direction of the linear abrasive 2 (counterclockwise CW). The tip side of the linear abrasive 2 is brought into contact with the surface of the work W disposed on the outer peripheral side. As a result, in the brush-like grindstone 1, the inorganic long fiber exposed at the tip of the linear abrasive 2 As a substantial abrasive, cut and grind burrs and irregularities on the workpiece w. When performing a grinding operation, not only the rotational movement, but also a combination of a reciprocating movement, an oscillation movement, and a rocking movement may be performed along the surface of the workpiece W. Furthermore, the movement of moving the brush-like grinding wheel 1 in the direction toward and away from the workpiece w may be combined.

In order to produce such a brush-like grindstone 1, in order to form a curved linear abrasive 2, first, for example, a single filament of an alumina long fiber having a diameter of 1 O jU m to 15 jU m Set the bobbins of the combined yarn (strand) that has been flatly bundled in a flat state without twisting, to a creel. Next, the aggregate yarn is pulled out from the bobbin, and is dipped in a binder resin such as epoxy resin to impregnate the binder resin, and then, while the excess binder resin is removed by the squeeze roller, cylindrical or cylindrical winding is performed. Take up so as not to overlap with the circumferential surface of the take-up roller. At this time, due to the tension applied to the collecting yarn, the positions of the respective alumina long fibers constituting the collecting yarn are shifted, and the collecting yarn is deformed into an elliptical shape in cross section or an oval shape in cross section. Next, when the binder resin is solidified, a linear abrasive 2 curved along the circumferential surface of the take-up roller can be formed. In the linear abrasive 2, the cross section of the linear abrasive 2 is a linear abrasive. It has a cross-sectional oval shape or an oval cross-sectional shape with the minor axis in the direction of curvature of 2. Next, the linear abrasive 2 is removed from the winding roller by cutting the linear abrasive 2 wound around the outer peripheral surface of the winding roller in the axial direction of the winding roller, and then the wire abrasive wire 2 is removed. Trim the abrasive 2 to the desired length. Next, while keeping the bending direction aligned, after bundling a predetermined number of linear abrasives 2, one end is inserted into the embedding hole 53 of the holder 5, and epoxy resin system, silicone resin system, etc. Fix to the holder 5 with an adhesive or the like.

According to such a manufacturing method, the curved linear abrasive 2 can be efficiently formed, and the linear abrasive 2 curved with a desired curvature can be obtained by changing the outer diameter of the take-up roller. It can be formed. In addition, when the outer shape of the take-up roller is an ellipse or an oval, it is possible to form a linear abrasive 2 in which the curvature changes depending on the position, or a portion having a straight portion. As described above, in the brush-like grindstone 1 of the present embodiment, the workpiece W is relatively moved with the tip of the linear abrasive 2 pressed against the workpiece W, and the workpiece W is ground. Here, since the linear abrasive 2 is formed by impregnating and solidifying a resin into a collection yarn of inorganic long fibers, the density of the inorganic long fibers substantially functioning as an abrasive is high, and the hardness is high. I have a strong waist. Therefore, the brush-like grindstone 1 of the present embodiment has high grinding ability.

Further, in the brush-like grindstone 1 of the present embodiment, each of the plurality of linear abrasives 2 is in a state of being curved from the proximal end side to the distal end side, and has an elliptical cross section with the minor axis in the bending direction. Alternatively, it has an elongated round shape in cross section. For this reason, the linear abrasive 2 has extremely high rigidity in the direction perpendicular to the bending direction, but easily deforms in the bending direction. Therefore, in the brush-like grindstone 1 of the present embodiment, the linear abrasive 2 has a soft tip of the workpiece W against the workpiece W in comparison with the brush-like grindstone 1 in which the linear abrasive 2 extends linearly. Because it deforms when excessive force is applied and absorbs excessive force, it does not break.

Further, since the linear abrasive 2 is fixed to the holder 5 in a state of being divided into the abrasive bundle 20, chips are efficiently discharged during grinding, and a heat radiation effect is obtained. high. For this reason, the brush-like grindstone 1 of the present embodiment is excellent in grinding ability. Therefore, it is possible to efficiently carry out deburring and grinding of precision machined parts with high accuracy. In addition, since the linear abrasive 2 can obtain high grinding performance with a small number, the cost of the brush-like grindstone 1 can be reduced. Further, the structure in which a large number of linear abrasives 2 are divided and fixed to the holder 5 can prevent the linear abrasives 2 from coming off. Therefore, the brush-like grindstone 1 of this embodiment has the advantage of high safety.

[Modification of Embodiment 1]

In the first embodiment, the circumferential groove is formed on the outer peripheral side surface 5 7 of the force holder 5 employing the configuration in which the plurality of linear abrasives 2 are held by the holder 5 as a plurality of abrasive bundles 20. A plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove. Second Embodiment

FIGS. 2 (A) and 2 (B) are a perspective view and a side view of a brush-like grinding stone according to Embodiment 2 of the present invention. The present embodiment and the third to eighth embodiments to be described later are similar in basic configuration to the first embodiment, and therefore, portions having common functions are denoted by the same reference numerals. Similarly to Embodiment 1, the brush-like grindstone 1 shown in FIGS. 2 (A) and 2 (B) is a linear abrasive material obtained by impregnating and solidifying resin in an aggregated filament of alumina filaments (inorganic filaments). Two or more pieces 2 have a structure held by a metal holder 5. The holder 5 is cylindrical with an axial hole 51 passing through in the direction of the axis L formed at the center, and a rotational drive shaft 55 is connected.

In the brush-like grindstone 1 of the present embodiment, a plurality of embedded holes 53 are formed at equal angular intervals on the outer peripheral side surface 5 7 of the holder 5. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the base end side is silicone resin-based, It is fixed by an adhesive such as epoxy resin. Therefore, a plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. The plurality of linear abrasives 2 are independent of each other in the state of the abrasive bundle 20.

Here, all the linear abrasives 2 are curved in the direction of the axis L from the base end side to the distal end side, and accordingly, the entire abrasive bundle 20 is also in the one side in the axial line L direction. Curved to the side. Further, as described with reference to FIG. 1 (C), the linear abrasive 2 has an elliptical or oval cross-sectional shape with the minor axis in the bending direction.

When the work W is deburred or ground, etc., using the brush-like grindstone 1 of the present embodiment, the drive shaft 55 is connected to the drive of the grinding machine, as shown in FIG. As shown in 2 (A) and (B), for example, turn it counterclockwise C CW, and place the tip side of the linear abrasive 2 on the surface of the work W placed on the outer peripheral side of the brush-like grindstone 1 Make contact. As a result, the inorganic long fibers exposed at the tip of the linear abrasive 2 in the brush-like grindstone 1 are cut and ground by burrs and irregularities of the workpiece W.

In the brush-like grindstone 1 configured in this way, as in the first embodiment, a linear abrasive 2 has high hardness and high grinding ability because it is made by impregnating and solidifying aggregated long fibers of inorganic filaments with resin. Further, each of the plurality of linear abrasives 2 is in a state of being curved toward the proximal end side, the tip end side, and has an elliptical or sectioned oval shape with the minor axis in the bending direction. . For this reason, the linear abrasive 2 is easily deformed in the bending direction. Therefore, the linear abrasive 2 has a soft contact with the workpiece W at its tip, and it does not break because it deforms and absorbs an excessive force even when an excessive force is applied by being hit by irregularities or the like on the surface of the workpiece W. Furthermore, since the linear abrasive 2 is fixed to the holder 5 in a state of being subdivided as the abrasive bundle 20, swarf is efficiently discharged at the time of grinding, and the heat radiation effect is high, etc. Play the effect of

[Modification of Embodiment 2]

In the second embodiment, the circumferential groove is formed on the outer peripheral side surface 5 7 of the force holder 5 employing the configuration in which the plurality of linear abrasives 2 are held by the holder 5 as a plurality of abrasive bundles 20. A plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove.

Third Embodiment

FIGS. 3 (A) and 3 (B) are a perspective view and a side view of a brush-like grinding stone according to Embodiment 3 of the present invention. Similarly to the first and second embodiments, the brush-like grindstone 1 shown in FIGS. 3 (A) and 3 (B) is a linear abrasive formed by impregnating and solidifying a resin into an aggregated filament of alumina filaments (inorganic filaments). A plurality of the members 2 are held by a metal holder 5. The holder 5 is cylindrical with an axial hole 51 passing through in the direction of the axis L formed at the center, and a rotary drive shaft 55 is connected.

In the brush-like grindstone 1 of the present embodiment, a plurality of embedded holes 53 are formed at equal angular intervals on the outer peripheral side surface 5 7 of the holder 5. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the base end side is silicone resin-based, It is fixed by an adhesive such as epoxy resin. Therefore, a plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. The abrasive bundle 20 is In this state, each of the plurality of linear abrasives 2 is in an independent state.

Here, all of the linear abrasives 2 are curved in the direction of the axis L from the base end side to the distal end side, and accordingly, the entire abrasive bundle 20 is also one side in the axis L direction. Curved to the side. Further, as described with reference to FIG. 1 (C), the linear abrasive 2 has an elliptical or oval cross-sectional shape with the minor axis in the bending direction.

In the brush-shaped grindstone 1 of the present embodiment, the linear abrasive 2 is longer than the brush-shaped grindstone 1 of the second embodiment, and the tip of the linear abrasive 2 extends substantially parallel to the axis L . Therefore, when deburring the workpiece W or grinding the surface using the brush-like grindstone 1 of this embodiment, the drive shaft 55 is connected to the drive device of the grinding machine, as shown in FIG. As shown in (A) and (B), for example, a workpiece W with its surface (surface to be ground) directed in the direction of the axis L is rotated around the axis L in the direction of the axis L, for example. Grind on the tip side.

In the brush-like grindstone 1 configured in this way, as in Embodiment 1, the linear abrasives 2 are made by impregnating and solidifying the resin into the aggregation filaments of the inorganic long fibers, so the hardness is high. , Has high grinding ability. Further, each of the plurality of linear abrasives 2 is in a state of being curved toward the proximal end side, the tip end side, and has an elliptical or sectioned oval shape with the minor axis in the bending direction. . For this reason, the linear abrasive 2 is easily deformed in the bending direction. Therefore, the linear abrasive 2 has a soft contact with the workpiece W at its tip, and it does not break because it deforms and absorbs an excessive force even when an excessive force is applied by being hit by irregularities or the like on the surface of the workpiece W. Furthermore, since the linear abrasive 2 is fixed to the holder 5 in a state of being subdivided as the abrasive bundle 20, swarf is efficiently discharged at the time of grinding, and the heat radiation effect is high, etc. Play the effect of

[Modification of Embodiment 3]

In the third embodiment, the circumferential groove is formed on the outer peripheral side surface 5 7 of the force holder 5 adopting the configuration in which the plurality of linear abrasives 2 are held by the holder 5 in the plurality of abrasive bundles 20. A plurality of linear abrasives 2 are maintained throughout the circumferential direction of the circumferential groove. A configuration that is held may be adopted.

[Fourth Embodiment]

FIGS. 4 (A) and 4 (B) are a perspective view and a plan view of a brush-like grinding stone according to Embodiment 4 of the present invention. Similarly to Embodiment 1, the brush-like grinding wheel 1 shown in FIGS.

A plurality of linear abrasives 2 formed by impregnating and solidifying resin in a collection yarn of inorganic long fibers), metal hol

It has a structure held in the five. The holder 5 has a cylindrical shape with an axial hole 51 passing through in the direction of the axis L at the center, and a rotational drive shaft inserted in the axial hole 51 by means of a screw (not shown) that is stopped from the side. 5 5 is connected to the holder 5.

A plurality of, for example, three holders 5 are arranged in the direction of the axis L. A plurality of embedded holes 53 are formed at equal angular intervals on each of the outer peripheral side surfaces 5 7 of the three holders 5. In each of the plurality of embedded holes 53, a plurality of linear abrasives 2 are circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the base end side is a silicone resin system, It is fixed by an adhesive such as epoxy resin. Therefore, a plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. In this embodiment, among the three holders 5, the holding position of the linear abrasive 2 is shifted in the circumferential direction between the adjacent holders 5. In the state where the abrasive bundle 20 is used, the plurality of linear abrasives 2 are in an independent state.

Here, in any of the three holders 5, the linear abrasive 2 is curved toward one side in the circumferential direction from the proximal end side to the distal end side, for example, in the clockwise direction CW, Along with it, the entire abrasive bundle 20 is also curved in the clockwise direction CW. Further, as shown in FIG. 1 (C), the linear abrasive 2 has an elliptical shape in cross section or an oval shape in cross section with the minor axis in the bending direction.

When deburring work W or grinding the surface of work W using brush-like grindstone 1 of the present embodiment, as in the first embodiment, drive shaft 55 is used as a driving device for a grinding machine. In the state of being connected to the brush wheel 1 as shown in Fig. 4 (A) and (B), The surface of the workpiece W disposed on the outer peripheral side of the brush-like grindstone 1 is ground on the tip side of the linear abrasive 2 by rotating it in the clockwise direction CW.

In this embodiment, three holders 5 are stacked in three stages, but in one holder 5, a row of embedded holes 53 formed at equal angular intervals in the circumferential direction is taken along the axis L direction. You may form more than one at different positions. Also, the number of holders 5 is

It may be two or four or more.

[Modification of Embodiment 4]

In the fourth embodiment described above, a configuration in which the plurality of linear abrasives 2 are formed into the plurality of abrasive bundles 20 and held by the plurality of holders 5 is adopted, but in each of the plurality of holders 5 A circumferential groove may be formed on the side surface 57, and a plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove.

Fifth Embodiment

FIGS. 5 (A) and 5 (B) are a perspective view and a side view of a brush-like grindstone according to Embodiment 5 of the present invention. In the same manner as in Embodiment 1, the brush-like grinding wheel 1 shown in FIGS.

It has a structure held in the five. The holder 5 has a cylindrical shape with an axial hole 51 passing through in the direction of the axis L at the center, and a rotational drive shaft inserted in the axial hole 51 by means of a screw (not shown) that is stopped from the side. 5 5 is connected to holder 5.

Three holders 5 are arranged in the direction of the axis L. In each of the three holders 5, a plurality of embedded holes 53 are formed on the outer peripheral side surface 5 7 at equal angular intervals. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the proximal end is silicone resin-based, It is fixed by an adhesive such as epoxy resin. For this reason, the plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. In the present embodiment, among the three holders 5, between the adjacent holders 5 The holding position of the linear abrasive 2 is shifted in the circumferential direction. In the state where the abrasive bundle 20 is used, the plurality of linear abrasives 2 are each in an independent state.

Here, in any of the three holders 5, the linear abrasive 2 is curved to one side in the direction of the axis L from the proximal end side to the distal end side, and along with that, the entire abrasive bundle 20 is Is also curved to one side in the direction of the axis L. Further, as shown in FIG. 1 (C), the linear abrasive 2 is provided with an elliptical or oval cross-sectional shape in which the minor axis is directed in the bending direction.

When deburring grinding or surface grinding is performed on the workpiece W using the brush-like grindstone 1 of the present embodiment, the driving shaft 55 is used as a driving device for the grinding machine as in the second embodiment. In the connected state, Figure 5 (

As shown in A) and (B), rotate the brush-like grindstone 1 counterclockwise C CW, and brush-like stone ft stone

The surface of the workpiece W disposed on the outer peripheral side of 1 is ground on the tip side of the linear abrasive 2.

In this embodiment, three holders 5 are stacked in three stages, but in one holder 5, a row of embedded holes 53 formed at equal angular intervals in the circumferential direction is taken along the axis L direction. You may form more than one at different positions. Also, the number of holders 5 may be two or four or more.

[Modification of Embodiment 5]

In the fifth embodiment described above, the plurality of linear abrasives 2 are formed into the plurality of abrasive bundles 20 and held by the plurality of holders 5. However, in each of the plurality of holders 5, the outer periphery A circumferential groove may be formed on the side surface 57, and a plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove.

Sixth Embodiment

FIG. 6 is a side view of a brush-like grinding stone according to Embodiment 6 of the present invention. FIG. 7 is an explanatory view showing an example of use of the brush-like grindstone of the present embodiment. Similarly to Embodiment 1, the brush-like grindstone 1 shown in FIG. 6 is a holder made of metal, in which a plurality of linear abrasives 2 are obtained by impregnating and solidifying a resin into an aggregated filament of alumina filaments (inorganic filaments). It has a structure held at 5. Holder 5 has an axial hole 51 passing through in the direction of axis L A rotary drive shaft 55 inserted into the shaft hole 51 is connected to the holder 5 by a screw (not shown) which is formed cylindrical at the center and stopped from the side.

Two holders 5 are arranged in pairs in the direction of the axis L. Also, on each of the outer peripheral side surfaces 5 7 of the two holders 5, a plurality of embedded holes 5 3 3 are formed at equal angular intervals. In each of the plurality of embedded holes 53, a plurality of linear abrasives 2 are circularly bundled as an abrasive bundle 2 0 (aggregation of linear abrasives 2), and the base end side is a silicone resin system, It is fixed by an adhesive such as epoxy resin. Therefore, a plurality of linear abrasives 2 radially extend from the outer peripheral side surface 5 7 of the holder 5 as an abrasive bundle 20. In the present embodiment, the holding position of the linear abrasive 2 is shifted in the circumferential direction between the holders 5 adjacent to each other among the two holders 5. Abrasive bundle

In the state of 20, the plurality of linear abrasives 2 are each in an independent state.

Here, at one side of the two holders 5 forming a pair, the linear abrasive 2 is curved to one side in the direction of the axis L from the proximal end side to the distal end side, along with that, the abrasive bundle

The entire 20 is also curved on one side in the direction of the axis L. On the other hand, on the other side of the two holders 5 forming a pair, it is curved to the other side in the direction of the axis L from the base end side to the tip side, and accordingly, the entire abrasive bundle 20 is also in the direction of the axis L Curved to the other side. Therefore, the plurality of linear abrasives 2 held by the two holders 5 are curved in the direction in which the front ends approach each other. Also, the linear abrasive 2 is shown in FIG.

As shown in C), it has an oval or oval cross section with the minor axis in the bending direction.

When deburring grinding or surface grinding is performed on the workpiece W using the brush-like grindstone 1 of the present embodiment, the drive shaft 55 is connected to the driving device of the grinding machine, as shown in FIG. As shown in FIG. 2, the brush-like grindstone 1 is rotated about the axis L, and the surface of the workpiece W disposed on the outer peripheral side of the brush-like grindstone 1 is ground at the tip side of the linear abrasive 2.

Further, as shown in FIG. 7, after forming an external thread W 12 on the shaft W 11, if the brush-like grindstone 1 of the present embodiment is used for finishing the external thread W 12, The screw thread can be finished efficiently.

Also, in the present embodiment, the two holders 5 are screwed to the common rotation drive shaft 55. Since the linear abrasives 2 wear and become short, it is possible to bring the two holders 5 close to adjust the positional relationship between the tips of the linear abrasives 2.

In the present embodiment, two holders 5 are arranged in two stages, and a structure in which the positional relationship can be adjusted is adopted. However, in one holder 5, embedded holes formed at equal angular intervals in the circumferential direction Two rows of 5 3 rows are formed at positions offset in the direction of the axis L, and a plurality of linear shapes are formed in the direction in which the tip portions are curved toward each other with respect to the embedded holes 53 in each row. The abrasive 2 may be held.

[Modification 1 of Embodiment 6]

In the above-described sixth embodiment, a configuration is adopted in which the plurality of linear abrasives 2 are formed into the plurality of abrasive bundles 20 and held by the plurality of holders 5, but in each of the plurality of holders 5 A circumferential groove may be formed on the side surface 57, and a plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove.

[Modification 2 of Embodiment 6]

In the sixth embodiment described above, the tips of the plurality of linear abrasives 2 held by the two holders 5 face each other, but as shown in FIG. 8, the state shown in FIG. More specifically, a configuration may be adopted in which two linear abrasives 2 held by two holders 5 intersect with each other with two holders 5 in close proximity. In this case, in the workpiece W 21, the inner surfaces of the facing protrusions W 22 can be simultaneously finish-machined at predetermined intervals.

Seventh Embodiment

9 (A) and 9 (B) are a plan view and a side view of a brush-like grinding stone according to Embodiment 7 of the present invention. FIG. 10 is an explanatory view showing an example of use of the brush-like grindstone of the present embodiment. Similarly to Embodiment 1, the brush-like grindstone 1 shown in FIGS. 9 (A) and (B) is a linear abrasive 2 formed by impregnating and solidifying resin in a filament of alumina long fibers (inorganic long fibers). There is a structure in which a plurality of holders are held by a metal holder 5. The holder 5 has a cylindrical shape with an axial hole 51 passing through in the direction of the axis L formed at the center, and the rotational drive inserted in the axial hole 51 by a screw (not shown) that is stopped from the side. Axis 5 5 is connected to the holder 5.

In the brush-like grindstone 1 of the present embodiment, a plurality of embedding holes 53 are formed at equal angular intervals on one side end surface 5 9 in the direction of the axis L of the holder 5. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregates of linear abrasives 2), and the base end side is silicone resin-based, It is fixed by an adhesive such as epoxy resin. In this state, the linear abrasive 2 extends in the direction of the axis L. In the state where the abrasive bundle 20 is used, the plurality of linear abrasives 2 are each in an independent state.

Here, all of the linear abrasives 2 are curved from the inside to the outside of the one side end face 59 of the holder 5 from the base end side to the tip end side, along with that, the abrasive bundle 2 The whole 0 is also curved from the inside to the outside. Further, as described with reference to FIG. 1 (C), the linear abrasive 2 has an oval cross-sectional shape or an oval cross-sectional shape in which the minor axis is directed in the bending direction.

When deburring grinding or surface grinding is performed on the workpiece W using the brush-like grindstone 1 of this embodiment, the drive shaft 55 is connected to the driving device of the grinding machine, as shown in FIG. As shown in (A) and (B), for example, the workpiece W with the surface (surface to be ground) oriented in the direction of the axis L is ground on the tip side of the linear abrasive 2 by rotating it in the counterclockwise direction C CW. .

In the brush-like grinding wheel 1 configured as above, as in the first embodiment, a linear abrasive

2 has high hardness and high grinding ability because it is made by impregnating and solidifying aggregated long fibers of inorganic filaments with resin. Further, each of the plurality of linear abrasives 2 is in a state of being curved toward the proximal end side, the tip end side, and has an elliptical or sectioned oval shape with the minor axis in the bending direction. . For this reason, the linear abrasive 2 is easily deformed in the bending direction. Therefore, the linear abrasive 2 has a soft contact with the workpiece W at its tip, and it does not break because it deforms and absorbs an excessive force even when an excessive force is applied by being hit by irregularities or the like on the surface of the workpiece W. Furthermore, since the linear abrasive 2 is fixed to the holder 5 in a state of being subdivided as the abrasive bundle 20, swarf is efficiently discharged at the time of grinding, and the heat radiation effect is high, etc. Play the effect of Further, as shown in FIG. 10 (A), the brush-like grindstone 1 of the present embodiment is subjected to a finishing process on a female screw W 32 formed on a work W 31, as shown in FIG. 10 (B) Finally, as shown in Fig. 10 (C), finish removal on the inner peripheral surface of the hole W3 4 formed in the work, removal of burrs at the intersection of the cross holes W3 6 and W 3 7 formed in the work 5 And is suitable for

[Modification of Embodiment 7]

In the seventh embodiment described above, although a plurality of linear abrasives 2 are held by the holder 5 in the form of a plurality of abrasive bundles 20, a circumferential groove is formed on one end face 59 of the holder 5. A plurality of linear abrasives 2 may be held throughout the circumferential direction of the circumferential groove.

[Embodiment 8]

11 (A) and 11 (B) are a plan view and a side view of a brush-like grinding stone according to Embodiment 8 of the present invention. FIG. 12 is an explanatory view showing an example of use of the brush-like grindstone of the present embodiment. Similarly to Embodiment 1, the brush-like grindstone 1 shown in FIGS. 1 (A) and (B) is a linear abrasive 2 obtained by impregnating and solidifying a resin into an aggregated filament of alumina filaments (inorganic filaments). There is a structure in which a plurality of holders are held by a metal holder 5. The holder 5 has a cylindrical shape in which an axial hole 51 passing through in the direction of the axis L is formed at the center, and a rotational drive shaft inserted into the axial hole 51 by a screw (not shown) which is stopped from the side. 5 5 is connected to the holder 5.

In the brush-like grindstone 1 of the present embodiment, a plurality of embedding holes 53 are formed at equal angular intervals on one end face 59 in the direction of the axis L of the holder 5. Each of the plurality of embedded holes 53 has a plurality of linear abrasives 2 circularly bundled as an abrasive bundle 2 0 (aggregates of linear abrasives 2), and the base end side is silicone resin-based, It is fixed by an adhesive such as epoxy resin. In this state, the linear abrasive 2 extends in the direction of the axis L. In the state where the abrasive bundle 20 is used, the plurality of linear abrasives 2 are each in an independent state.

Here, each of the linear abrasives 2 is curved from the outside to the inside of the one side end face 5 9 in the direction of the axis L of the holder 5 from the base end side to the tip end side, And, the entire abrasive bundle 20 is also curved inward. Further, as described with reference to FIG. 1 (C), the linear abrasive 2 has an oval cross-sectional shape or an oval cross-sectional shape with the minor axis in the bending direction.

When deburring grinding or surface grinding is performed on the workpiece W using the brush-like grindstone 1 of the present embodiment, the drive shaft 55 is connected to the driving device of the grinding machine, as shown in FIG. 1 As shown in (A) and (B), for example, when rotating in the counterclockwise direction CW around the axis L, the work W with the surface (surface to be ground) in the direction of the axis L is a linear abrasive 2 Grind at the end of the

In addition, as shown in FIG. 12 (A), the brush-like grindstone 1 of the present embodiment is a workpiece W 4

It is suitable for finishing on the external thread W 4 2 formed in 1, and finishing on the outer peripheral surface of the shaft-like work W 4 3 as shown in Fig. 12 (B).

In the brush-like grindstone 1 configured as above, as in the first embodiment, a linear abrasive is used.

2 has high hardness and high grinding ability because it is made by impregnating and solidifying aggregated long fibers of inorganic filaments with resin. Further, each of the plurality of linear abrasives 2 is in a state of being curved toward the proximal end side, the tip end side, and has an elliptical or sectioned oval shape with the minor axis in the bending direction. . For this reason, the linear abrasive 2 is easily deformed in the bending direction. Therefore, the linear abrasive 2 has a soft contact with the workpiece W at its tip, and it does not break because it deforms and absorbs an excessive force even when an excessive force is applied by being hit by irregularities or the like on the surface of the workpiece W. Furthermore, since the linear abrasive 2 is fixed to the holder 5 in a state of being subdivided as the abrasive bundle 20, swarf is efficiently discharged at the time of grinding, and the heat radiation effect is high, etc. Play the effect of

[Modification of Embodiment 8]

In the eighth embodiment described above, a circumferential groove is formed on one end face 59 of the force holder 5 adopting a configuration in which the plurality of linear abrasives 2 are held by the holder 5 as a plurality of abrasive bundles 20. A configuration may be adopted in which a plurality of linear abrasives 2 are formed over the entire circumferential direction of the circumferential groove. Other Embodiments

In any of the above embodiments, all of the linear abrasives 2 have a configuration in which the whole from the base end side to the tip end side is curved, for example, as shown in FIG. 13 (A), (B), and As shown in FIG. 14, a configuration may be adopted in which the linear abrasive 2 is curved at one point from the proximal side to the distal side. In order to produce such a brush-like grindstone 1, first of all, 1000 filaments of alumina long fibers (single filaments of alumina long fibers) are bundled flatly without being twisted and continuously wound. The aggregated yarn (strand) is dipped in a binder resin such as epoxy resin to be impregnated with the binder resin. Next, for example, after winding so as not to overlap with the circumferential surface of the square roller whose corner portion is R, the binder resin is solidified, and thereafter, the linear abrasive 2 is cut out.

In any of the above-described embodiments, a plurality of linear abrasives 2 formed by impregnating and solidifying resin with aggregated filaments of alumina long fibers (inorganic long fibers) are held by a metal holder 5. Although the example has been described, the present invention may be applied to the brush-like grinding wheel 1 using silicon carbide fiber, carbon fiber, silicon nitride fiber, or glass fiber as the inorganic long fiber.

In any of the above embodiments, the linear abrasive 2 is fixed to the holder 5 in a state of being subdivided as the abrasive bundle 20, or the linear abrasive 2 is subdivided as the abrasive bundle 20 The present invention is applicable to the brush-like grindstone 1 in which the linear abrasives 2 are held in one holder and held by the holder 5 although they are fixed to the circumferential groove without being fixed.

[0084] In any of the above embodiments, the aggregate yarn used for the linear abrasive 2 used was not twisted but a linear abrasive using the aggregated yarn with twist was used. 2 may be configured. Further, the curved linear abrasive 2 may be configured so as to partially include a linear abrasive that extends linearly and is not curved. Industrial applicability

In the brush-like grindstone of the present invention, since the linear abrasive is formed by impregnating the aggregated filaments of the inorganic filaments with the resin and solidifying it, the density of the inorganic filaments that substantially function as an abrasive is high. And, because it has high hardness and stiffness, it has high grinding ability. The Also, the linear abrasive is in a curved state, and deforms easily in the bending direction. Therefore, in the brush-like grindstone according to the present invention, the linear abrasive has a soft contact with the work of the tip portion as compared with the brush-like grindstone in which the linear abrasive extends linearly, and the excess is too large. When a force is applied, it deforms and absorbs excessive force, so it does not break.

Claims

The scope of the claims

[1] A brush-like grindstone in which a plurality of linear abrasives obtained by impregnating and solidifying resin in aggregated long fibers of inorganic long fibers are held by holders,

Each of the plurality of linear abrasives is curved at at least one position from the base end side to the tip end side.

[2] The brush-like grindstone according to claim 1, wherein each of the plurality of linear abrasives is curved from the proximal end side to the entire distal end side.

[3] The brush-like grindstone according to claim 1, wherein each of the plurality of linear abrasives radially extends from an outer peripheral side surface of the holder and is curved in the same circumferential direction. .

[4] A plurality of the holders are arranged in the axial direction of the holder,

The brush-like grindstone according to claim 3, wherein the plurality of linear abrasives are held by each of the plurality of holders.

[5] Each of the plurality of linear abrasives radially extends from an outer peripheral side surface of the holder, and is curved toward one side in the axial direction of the holder. Brush-like grindstone as described in.

[6] A plurality of the holders are arranged in the axial direction of the holder,

The brush-like grindstone according to claim 5, wherein the plurality of linear abrasives are held by each of the plurality of holders.

[7] The holders are disposed in the axial direction of the two holders in pairs.

The plurality of linear abrasives radially extend from the outer peripheral surface of the two holders, and in a direction in which the tips of the plurality of linear abrasives held by the two holders approach each other The brush-like grinding wheel according to claim 1, characterized in that it is curved.

[8] Each of the plurality of linear abrasives extends in the axial direction from the one end surface in the axial direction of the holder, and is curved from the inside to the outside of the one end surface. The brush-like grindstone according to claim 1 characterized by the above. Each of the plurality of linear abrasives extends in the axial direction from one end face in the axial direction of the holder, and is curved inward from the outside of the one end face. The brush-like grindstone according to claim 1.

The brush-like grindstone according to claim 1, wherein the plurality of linear abrasives are held in a plurality of bundles and held by the holder.

The brush-like member according to claim 1, wherein the plurality of linear abrasives are held in a circumferential groove formed on one end surface or outer peripheral side surface of the holder over the entire circumferential direction. Whetstone.

The brush-like grindstone according to claim 1, wherein the plurality of linear abrasives have a cross-sectional elliptical shape or a cross-sectional oval shape with the minor axis in the bending direction, from the holder to the axial direction The drive shaft extends to the

The brush-like grindstone as described in 1.

The inorganic long fiber is any one of alumina fiber, silicon carbide fiber, carbon fiber, silicon nitride fiber, and glass fiber, according to any one of claims 1 to 13. Brush-like whetstone.