WO2015037728A1 - 研磨方法、ブラシ状砥石、研磨ブラシおよび線材集合体 - Google Patents
研磨方法、ブラシ状砥石、研磨ブラシおよび線材集合体 Download PDFInfo
- Publication number
- WO2015037728A1 WO2015037728A1 PCT/JP2014/074316 JP2014074316W WO2015037728A1 WO 2015037728 A1 WO2015037728 A1 WO 2015037728A1 JP 2014074316 W JP2014074316 W JP 2014074316W WO 2015037728 A1 WO2015037728 A1 WO 2015037728A1
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- WO
- WIPO (PCT)
- Prior art keywords
- brush
- holder
- wire
- wire rod
- hole
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B7/00—Bristle carriers arranged in the brush body
- A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
- A46B7/046—Threaded or screw connections for bristle carriers
- A46B7/048—Lock screw to secure carriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
- B24D13/145—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face having a brush-like working surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/30—Brushes for cleaning or polishing
- A46B2200/3086—Brushes for polishing
Definitions
- the present invention relates to a brush-like grindstone, a polishing brush having the brush-like grindstone, and a wire rod assembly in which the wire rods are bundled.
- a workpiece is polished with a wire
- the tip of the wire exhibits an effect close to grinding.
- deburring a workpiece with a wire the tip of the wire exhibits an effect close to grinding. Therefore, in the following description, “polishing” and “grinding” are used without distinction.
- the brush-like grindstone those using a wire obtained by solidifying an inorganic continuous fiber such as alumina long fiber with a resin binder, or using a wire such as brass or nylon have been proposed.
- the end of the bundle of wire rods is fixed to each of the plurality of holes of the brush holder with an adhesive.
- Such a brush-like grindstone is used for polishing in a state of being held in a brush case in a polishing brush, for example (see Patent Document 1).
- the brush holder is increased in diameter, and a large number of bundles of wire rods are provided over the wide area of the brush holder.
- the object of the present invention is to provide a polishing method, a brush-like grindstone capable of reducing the cost required for the polishing step, even when the polishing step is performed with a bundle of wires provided in the brush holder.
- An object is to provide a polishing brush and a wire assembly.
- the present invention provides a polishing method using a bundle of wire rods and a brush-like grindstone in which a plurality of the bundles are held by a brush holder, wherein an end of the bundle is fixed to the wire rod holder. And forming the brush-like grindstone by detachably attaching the wire holder to each of a plurality of holding holes opened on one side in the axial direction of the brush holder. At the time, when it is necessary to reduce, add, or replace the plurality of wire aggregates held by the brush holder, at least one of removal of the wire aggregates from the brush holder and attachment to the brush holder Then, the polishing step is performed.
- the wire aggregate in which the wire is bundled and fixed to the wire holder is detachably attached to the holding hole of the brush holder. For this reason, when it is necessary to reduce, add, or replace a plurality of wire aggregates held by the brush holder, such a response can be easily performed. Accordingly, even when a large number of bundles of wire rods are provided over a wide area of the brush holder so that a wide area of the workpiece is efficiently polished, one brush-like grindstone uses a wire rod according to the type of workpiece to be polished. The number of aggregates can be changed. Further, even when a defect such as a breakage occurs in any of the wire aggregates, only the necessary wire aggregates need be replaced, and it is not necessary to discard the entire brush-like grindstone. Therefore, the cost required for the polishing process can be reduced.
- the brush-like grindstone according to the present invention includes a wire assembly in which a large number of wires are bundled and ends are fixed to a wire holder, and a plurality of holding holes are opened on one surface side in the axial direction. And a brush holder to which the wire rod holder is detachably attached to each of the holding holes.
- the wire aggregate in which the wire is bundled and fixed to the wire holder is detachably attached to the holding hole of the brush holder. For this reason, when it is necessary to reduce, add, or replace a plurality of wire aggregates held by the brush holder, such a response can be easily performed. Accordingly, even when a large number of bundles of wire rods are provided over a wide area of the brush holder so that a wide area of the workpiece is efficiently polished, one brush-like grindstone uses a wire rod according to the type of workpiece to be polished. The number of aggregates can be changed. Further, even when a defect such as a breakage occurs in any of the wire aggregates, only the necessary wire aggregates need be replaced, and it is not necessary to discard the entire brush-like grindstone. Therefore, the cost required for the polishing process can be reduced.
- the brush holder includes a disk-shaped bottom plate portion, and a cylindrical portion protruding from the outer peripheral side of the bottom plate portion toward the one surface side in the axial direction, and the holding is provided on the distal end surface of the cylindrical portion. It is preferable that a hole is formed. According to this configuration, even when the diameter of the brush holder is increased, the weight of the brush holder can be reduced. Further, the cylindrical portion protrudes in the axial direction from the outer peripheral side of the bottom plate portion, and the cylindrical portion functions as a weight. For this reason, the brush holder can be rotated in a stable state. In addition, since the holding hole is formed in the tip surface of the cylindrical portion, the holding hole can be formed to a sufficient depth.
- the distance d and the radius r are the following conditional expressions: r ⁇ 0.111d Is preferably satisfied.
- the distance d and the radius r are expressed by the following conditional expression: r ⁇ 0.0526d Is preferably satisfied. According to this configuration, when polishing is performed by rotating the brush holder about the central axis, the wire positioned on the radial center side of the brush holder in the bundle and the wire positioned on the radial outside of the brush holder in the bundle The difference in the peripheral speed between and can be less than 10%. Therefore, polishing can be performed properly.
- the wire rod holder includes a holder portion that is not circular when viewed from the axial direction, and the brush holder is fitted to the holder portion when the wire rod holder is inserted into the holding hole. It can be provided with a mating fitting. If it does in this way, since it can prevent that the wire rod holder inserted in the holding hole rotates in a holding hole, it can prevent that the behavior of the wire aggregate fixed to the brush holder becomes unstable at the time of grinding
- the wire holder is detachably attached to the brush holder by a screw-type fixing mechanism in the holding hole.
- a fixing hole penetrating from the outer peripheral surface of the brush holder to the holding hole is formed in the brush holder, and the screw-type fixing mechanism includes a female screw formed on an inner peripheral surface of the fixing hole, and the fixing And a set screw which is fixed to the female screw inside the hole and abuts against the wire rod holder. If it does in this way, a wire holder can be fixed to a brush holder by simple composition.
- the set screw may be positioned at a tip of a set screw positioning recess provided on the outer peripheral surface of the wire rod holder. If it does in this way, the contact position of a set screw can be prescribed
- a first fixing hole penetrating the wire holder in a direction orthogonal to the axial direction is formed in a portion of the wire holder that is located on the opposite side to the side on which the wire extends.
- a second fixing hole penetrating from the outer peripheral surface of the brush holder to the holding hole is formed, and the screw-type fixing mechanism includes a female screw formed on an inner peripheral surface of the first fixing hole; It is possible to adopt a configuration including a set screw that is fixed to the internal thread inside the first fixing hole and abuts against an inner wall of the holding hole opposite to the second fixing hole.
- the second fixing hole may be formed as a groove that is cut out from one side of the brush holder in the axial direction and extends in the axial direction. If it does in this way, attachment and detachment of a wire aggregate can be performed in the state where a set screw was attached to a wire rod holder.
- the set screw is screwed into the first fixing hole of the wire holder and the end portion of the set screw protrudes to the outer peripheral side (the second fixing hole side). And Then, the protruding end portion is inserted into the second fixing hole, which is a groove, from one surface side in the axial direction, and the wire rod holder is inserted into the holding hole.
- a set screw is screwed to fix the wire assembly to the brush holder. Accordingly, the wire rod holder can be inserted into the holding hole in a state in which the direction of the wire rod assembly is adjusted, so that the wire rod assembly can be easily attached. Further, when removing the wire aggregate from the brush holder, the set screw is loosened so that the end portion of the set screw protrudes toward the second fixing hole. If the set screw is moved to one side in the axial direction in this state, the wire assembly can be removed without completely pulling out the set screw from the first fixing hole of the wire holder. Accordingly, it is easy to remove the wire aggregate.
- a first fixing hole that penetrates the wire rod holder in a direction orthogonal to the axial direction is formed in a portion of the wire rod holder that is located on the opposite side to the side on which the wire extends.
- the holder has a second fixing hole penetrating from the outer peripheral surface of the brush holder to the holding hole, and an opening at a position communicating with the first fixing hole on the inner wall of the holding hole opposite to the second fixing hole.
- a third fixing hole is formed, and the screw type fixing mechanism includes a female screw formed on an inner peripheral surface of the third fixing hole, and a stopper that penetrates the first fixing hole and is fixed to the female screw. You may employ
- the second fixing hole may be formed as a groove that is cut out from one side of the brush holder in the axial direction and extends in the axial direction. If it does in this way, attachment and detachment of a wire aggregate can be performed in the state where a set screw was attached to a wire rod holder.
- the set screw is attached to the first fixing hole of the wire holder, and the end portion of the set screw is protruded to the outer peripheral side (the second fixing hole side). State. Then, the protruding end portion is inserted into the second fixing hole, which is a groove, from one surface side in the axial direction, and the wire rod holder is inserted into the holding hole.
- the set screw is fixed to the female screw of the third fixing hole, and the wire assembly is fixed to the brush holder. Accordingly, the wire rod holder can be inserted into the holding hole in a state in which the direction of the wire rod assembly is adjusted, so that the wire rod assembly can be easily attached. Further, when removing the wire assembly from the brush holder, the set screw which is fixed to the female screw of the third fixing hole is loosened, and the end portion of the set screw protrudes toward the second fixing hole. To do. If the set screw is moved to one side in the axial direction in this state, the wire assembly can be removed without completely pulling out the set screw from the first fixing hole of the wire holder. Accordingly, it is easy to remove the wire aggregate.
- the wire rod holder has a first fixing hole that opens on the other surface in the axial direction, and a portion of the brush holder that overlaps the wire rod holder on the other side communicates with the holding hole.
- a second fixing hole is formed, and the screw-type fixing mechanism includes a female screw formed in the first fixing hole and a set screw that passes through the second fixing hole and is fixed to the female screw.
- a configuration may be adopted.
- the screw type fixing mechanism may adopt a configuration including a female screw formed on the inner peripheral surface of the holding hole and a male screw formed on the outer peripheral surface of the wire rod holder.
- the wire holder may be configured to be detachably attached to the brush holder by a magnet type fixing mechanism in the holding hole. According to such a configuration, it is easy to replace the wire aggregate.
- the wire holder includes an iron-based metal portion, and the brush holder holds a magnet that magnetically attracts the wire holder. According to such a configuration, costs such as disposal can be reduced as compared with the case where the magnet is provided on the wire holder side (wire assembly) side.
- the brush holder has a through hole communicating with the holding hole in a portion overlapping the wire rod holder when viewed from the axial direction on the other surface side opposite to the one surface side in the axial direction. Preferably it is formed. According to this configuration, when replacing the wire aggregate, the wire rod holder can be pushed out from the holding hole by the jig inserted into the through hole.
- the brush holder has a through hole communicating with the holding hole in a portion overlapping the wire rod holder when viewed from the axial direction on the other surface side opposite to the one surface side in the axial direction.
- the wire rod holder is formed with a supported portion facing the side in which the wire extends in the axial direction, and the supported portion extends on the inner peripheral surface of the holding hole.
- a support portion is formed to support the wire holder, and the brush holder is attached to the holding hole from the side opposite to the side where the wire extends through the through hole.
- the wire may be obtained by impregnating and solidifying a resin into an aggregate yarn of inorganic long fibers.
- the brush-like grindstone to which the present invention is applied is used, for example, for a polishing brush having a brush case that holds the brush holder so that the position of the brush-like grindstone in the axial direction can be adjusted. According to this configuration, since the position of the wire in the axial direction can be adjusted, the contact pressure between the wire and the workpiece can be adjusted.
- the brush case is formed with a support shaft extending in the axial direction inside the brush case and a guide hole extending in a groove shape in the axial direction on the peripheral wall of the brush case
- the holder is formed with a shaft hole into which the support shaft fits and a screw hole reaching from the outer peripheral surface of the holder to the shaft hole, and the screw is in a state where the tip end of the screw shaft abuts on the outer peripheral surface of the support shaft It is preferable to be fixed to the screw hole. According to such a configuration, the screw can be tightened or loosened by inserting a tool from the guide hole, and the position where the wire rod protrudes from the peripheral wall can be easily adjusted. Therefore, the contact pressure between the wire and the workpiece can be adjusted.
- a flow path penetrating the support shaft in the axial direction is formed on the support shaft. According to such a configuration, the cutting agent can be discharged from the flow path, so that the shavings can be efficiently discharged. Therefore, clogging of the shavings hardly occurs at the tip end portion of the wire, so that a reduction in polishing ability can be suppressed.
- the support shaft is provided with a stopper for restricting the displacement of the wire rod inward in the radial direction. According to such a configuration, it is possible to restrict escape to the inner side in the radial direction of the wire, so that the contact pressure between the wire and the workpiece can be maintained at an appropriate level.
- the wire assembly according to the present invention includes a plurality of wire rods obtained by impregnating and solidifying a set yarn of inorganic long fibers, a wire rod holder in which the multiple wire rods are bundled and fixed at an end,
- the wire rod holder includes a holder portion that is not circular when viewed from the axial direction of the bundle. According to such a configuration, it is possible to prevent the wire rod holder inserted into the holding hole from rotating within the holding hole by providing the holding hole with the fitting portion that fits with the holder portion. Therefore, it is possible to prevent the behavior of the wire aggregate fixed to the brush holder from becoming unstable during polishing.
- the wire assembly according to the present invention includes a plurality of wire rods obtained by impregnating and solidifying a set yarn of inorganic long fibers, a wire rod holder in which the multiple wire rods are bundled and fixed at an end,
- the wire rod holder has a fixing hole penetrating the wire rod holder in a direction perpendicular to the axial direction in a portion located on the opposite side of the wire in the axial direction. It is characterized by being. According to this configuration, the wire aggregate can be detachably attached to the brush holder using the fixing hole.
- a wire assembly according to another embodiment of the present invention includes a large number of wires obtained by impregnating and solidifying an inorganic long fiber aggregate yarn, and a plurality of the wire rods bundled together to fix the ends.
- a fixing hole that opens on a surface opposite to the side on which the wire extends in the axial direction is formed on the inner periphery of the fixing hole.
- a female screw is formed. According to this configuration, the wire aggregate can be detachably attached to the brush holder using the fixing hole.
- a wire assembly according to still another embodiment of the present invention includes a large number of wires obtained by impregnating and solidifying an inorganic long fiber aggregate yarn with a resin, and a plurality of the wire rods bundled to fix an end portion.
- a wire assembly includes a large number of wires obtained by impregnating and solidifying an inorganic long fiber aggregate yarn with a resin, and a plurality of the wire rods bundled to fix an end portion.
- a portion having a large diameter is formed. According to such a configuration, the wire aggregate can be detachably attached to the brush holder using the portion having the large outer diameter.
- the wire assembly according to another embodiment of the present invention includes a large number of wire materials obtained by impregnating and solidifying an inorganic long fiber aggregate yarn, and a bundle of the many wire materials to fix the ends.
- FIG. 1 is an explanatory view schematically showing a state in which a brush-like grindstone is fixed inside a brush case in the polishing brush according to Embodiment 1 of the present invention.
- FIG. 2 is an exploded perspective view schematically showing a state where the polishing brush shown in FIG. 1 is disassembled into a brush case and a brush-like grindstone.
- the polishing brush 1 of the present embodiment includes a brush-like grindstone 3 including a plurality of wire rods 50 in which aggregate yarns of inorganic long fibers such as alumina long fibers are solidified by a resin binder,
- the brush case 2 that holds the brush-like grindstone 3 is provided, and the work (material to be polished) is polished using the free end (tip) of the wire 50.
- a plurality of wire rods 50 are held in the brush holder 6 as a plurality of bundles 51.
- the wire 50 is formed by impregnating a binder resin such as an epoxy resin or a silicone resin into an aggregate of inorganic long fibers such as alumina fiber filaments and curing it.
- the aggregate yarn is, for example, an aggregate of 250 to 3000 alumina long fibers (inorganic long fibers) having a fiber diameter of 8 to 50 ⁇ m, and the aggregate yarn has a diameter of 0.1 mm to 2 mm. For this reason, the diameter of the wire 50 is 0.1 mm to 2 mm, similar to the diameter of the aggregate yarn.
- the inorganic long fiber is not particularly limited as long as it is a material that is relatively abrasive with respect to the workpiece, that is, a material that is harder and more brittle than the material to be polished.
- Fiber, boron fiber, or glass fiber can be used. Depending on the material to be polished, these may be mixed, and the alumina fiber and silicon carbide fiber have very good polishing properties for ferrous and non-ferrous metals.
- alumina long fibers are used as the inorganic long fibers.
- the cross-sectional shape of the wire 50 is a circle, a regular polygon, or a flat shape.
- the circle here is a perfect circle or a substantially perfect circle
- the regular polygon is a square, a regular hexagon, or the like
- the flat shape is an ellipse, an ellipse, a rectangle, or the like.
- the wire 50 has a circular cross-sectional shape.
- the flatness is 1.6 to 15, preferably 1.6 to 10, more preferably Is preferably from 2.0 to 4.0.
- FIG. 3 is an explanatory diagram of the brush case 2 of the polishing brush 1 according to Embodiment 1 of the present invention.
- FIGS. 3 (a) and 3 (b) show a part (right half) of the brush case 2 cut out. It is the side view which shows missing and the bottom view which looked at the brush case 2 from the one side of the axial direction.
- the brush case 2 includes a metal end plate 220 that forms a circular upper bottom portion 22, a metal cylindrical body 230 that forms a peripheral wall 23, and a central hole in the upper bottom portion 22.
- a cylindrical portion 24 fixed to the cylindrical portion 221 and a metal support shaft 25 fixed to the cylindrical portion 24 by screwing or the like while being fitted to the cylindrical portion 24 are provided.
- the cylindrical body 230 is fixed to the side plate portion 222 of the end plate 220 with screws 26.
- the support shaft 25 further protrudes from the upper bottom portion 22 to one side L1 in the direction of the axis L, and the drive shaft 21 is configured by the portion of the support shaft 25 protruding from the upper bottom portion 22.
- the support shaft 25 extends in the direction of the axis L concentrically with the peripheral wall 23 inside the brush case 2.
- the brush case 2 has a peripheral wall 23 made of aluminum and a support shaft 25 made of stainless steel.
- the brush case 2 is formed with a flow path 28 for discharging the liquid cutting agent toward the side (one side L1) where the free end of the wire 50 is located.
- a tubular member is used as the support shaft 25, and the flow path 28 opens as a discharge port 280 at the lower end surface 250 (end portion) of the support shaft 25. ing. Accordingly, the discharge port 280 of the flow path 28 is opened inside the region surrounded by the plurality of wires 50.
- FIG. 4 is an explanatory diagram of the brush holder 6 of the polishing brush 1 according to Embodiment 1 of the present invention.
- FIGS. 4 (a) and 4 (b) show a part (right half) of the brush holder 6 cut out. It is the side view which lacks and shows the bottom view which looked at the brush holder 6 from the one side of the axial direction.
- the brush holder 6 has a substantially disk shape that holds a bundle 51 of wire rods 50.
- the surface of one side L1 where the wire 50 extends in the direction of the axis L in the brush holder 6 is a portion corresponding to the position between the position spaced radially outward from the position through which the axis L passes and the radially outer end. Is a recess 681.
- the brush holder 6 has a structure in which a cylindrical portion 62 having a shaft hole 30 is formed at the center of the bottom plate portion 61, and the support shaft 25 is inserted into the shaft hole 30. Further, in the brush holder 6, a cylindrical portion 63 protruding toward the one side L ⁇ b> 1 in the axis L direction is formed at the radially outer end of the bottom plate portion 61.
- the bundle 51 of the wire rods 50 is in a state of extending from the tip surface 64 facing the one side L1 in the axis L direction of the cylindrical portion 63 toward the one side L1 in the axis L direction.
- a plurality of holding holes 68 are formed at positions at equal angular intervals in the circumferential direction on the front end surface 64 of the cylindrical portion 63, and the bundle 51 of the wire rods 50 is held in the holding holes 68.
- the holding hole 68 is formed in a single manner on the distal end surface 64 of the cylindrical portion 63, and the bundle 51 of the wire 50 is held in a single manner.
- the diameter of the brush holder 6 is increased, and a large number of bundles 51 are held by the brush holder 6.
- the outer diameter of the brush holder 6 is about 200 mm, and 64 bundles 51 are held in the brush holder 6.
- the bundle 51 of the wire 50 constitutes a wire assembly 7 whose ends are fixed by an adhesive by a wire holder 70, and the state of the wire assembly 7 Is held in the holding hole 68 of the brush holder 6.
- the bundle 51 is held at equiangular intervals around the shaft hole 30 on the tip surface 64 of the cylindrical portion 63. Therefore, in a state where the support shaft 25 is inserted into the shaft hole 60, the bundle 51 of the wire rods 50 extends along the axis L around the support shaft 25.
- a hole 67 reaching the shaft hole 60 from the outer peripheral surface of the bottom plate portion 61 is formed at a point-symmetrical position across the axis L, and among the inner peripheral surface of the hole 67 A female screw 670 (screw hole) is formed in a portion located near the shaft hole 60.
- the portion where the tip of the screw 29 abuts on the support shaft 25 is a flat surface 259.
- the fixing portion using the screw 29, the guide hole 27, and the hole 67 female screw 670 is provided at three or more places in the circumferential direction, for example, three places at equiangular intervals. Even when the diameter of the polishing brush 1 is increased, the brush-like grindstone 3 can be stably fixed to the brush case 2.
- the screw 29 is kept shallow in the female screw 670 of the brush holder 6 through each guide hole 27 of the brush case 2 and the brush-like grindstone 3 is moved in the axis L direction inside the brush case 2 in this state,
- the position in the axis L direction of the brush-like grindstone 3 inside the brush case 2 can be adjusted. Therefore, since the protrusion dimension of the free end of the wire 50 at the lower end portion of the brush case 2 can be adjusted, the waist strength of the wire 50, that is, the grindability and the conformability can be optimized.
- the guide hole 27 extends parallel to the axis L, but the guide hole 27 may extend obliquely with respect to the axis L.
- the polishing brush 1 of this embodiment is connected to a polishing machine via a drive connecting shaft 21 protruding at the upper part of the brush case 2.
- the polishing brush 1 is rotationally driven around the axis L in a state where the free end of the wire 50 is in contact with the workpiece, and is used for polishing or deburring various workpieces.
- the polishing brush 1 is not limited to rotational motion, and may be reciprocated, oscillated, oscillated, or a combination of these operations. Furthermore, the movement which moves the polishing brush 1 up and down in the direction of the axis L may be combined.
- a liquid cutting agent is supplied to the flow path 28 formed in the support shaft 25 of the polishing brush 1 via the drive connecting shaft 21, and is discharged from the discharge port 280. Discharge the cutting agent. As a result, the shaving powder generated between the tip of the wire 50 and the workpiece flows out together with the cutting agent.
- a cutting agent either an oil-based cutting agent (cutting oil) or a water-soluble cutting agent may be used.
- the wire 50 itself is also worn, and the protruding dimension of the wire 50 at the lower end of the brush case 2 is shortened. Since good deburring and polishing cannot be performed in this state, the protrusion size of the wire 50 at the lower end of the brush case 2 is adjusted to improve the waist strength of the wire 50, that is, the grindability and conformability. adjust.
- the screw 29 is loosened, the brush-like grindstone 3 is moved in the direction of the axis L inside the brush case 2, and the axis L of the brush-like grindstone 3 inside the brush case 2. Shift the position in the direction downward.
- the protruding dimension of the free end of the wire 50 at the lower end of the brush case 2 can be adjusted again to the optimum dimension.
- the screw 29 is guided to the guide hole 27, whereby the brush-like grindstone 3 moves along the guide hole 27 in the brush case 2.
- the brush holder 6 is in a state of being fitted to the brush case 2, but the support shaft 25 is fitted in the shaft hole 60 of the brush holder 6. For this reason, the brush holder 6 does not tilt inside the brush case 2 even if the dimensional tolerance between the outer diameter dimension of the brush case 2 and the inner diameter dimension of the brush case 2 is not strict. Therefore, there is no variation in the projecting dimension of the wire 50 at the lower end of the brush case 2.
- the brush holder 6 can be fixed at the center position of the brush case 2 without tightening the dimensional tolerance between the outer diameter dimension of the brush holder 6 and the inner diameter dimension of the brush case 2, so that the runout may occur during rotation. Does not occur.
- FIG. 5 is an explanatory diagram of the wire assembly 7 used in the polishing brush 1 according to Embodiment 1 of the present invention.
- FIGS. 5 (a), 5 (b), and 5 (c) show the wire assembly 7 as a brush.
- the bundle 51 of the wire 50 constitutes a wire assembly 7 whose ends are held by an adhesive by the wire holder 70, and the brush holder 6 is in the state of the wire assembly 7.
- the holding hole 68 is held.
- the wire rod holder 70 includes a bottom 71 located at the end of the other side L2 in the axis L direction, and a cylindrical tube extending from the outer edge of the bottom 71 toward the one side L1 in the axis L direction.
- the end part of the bundle 51 of the wire 50 is being fixed inside the cylinder part 72 with the adhesive agent.
- the holding hole 68 is a circular hole, and the cylindrical portion 72 of the wire rod holder 70 has an outer diameter that is slightly smaller than the inner diameter of the holding hole 68.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7 a using a set screw 81.
- a first fixing hole 731 penetrating in a direction orthogonal to the axis L direction is formed in the bottom 71 of the wire rod holder 70, and a female screw 731 a is formed on the inner peripheral surface of the first fixing hole 731. Is formed.
- cylindrical portion 63 of the brush holder 6 is formed with a second fixing hole 691 penetrating from the outer peripheral surface to the holding hole 68, and the holding hole 68 is opposite to the side where the second fixing hole 691 is located (diameter).
- a concave portion 681 is formed on the inner wall 689 on the inner side in the direction at a position facing the second fixing hole 691.
- the first fixing hole 731 is prepared.
- Set screw 81 inside.
- the set screw 81 since the length dimension of the set screw 81 is smaller than the length dimension of the first fixing hole 731, the set screw 81 does not protrude from the first fixing hole 731.
- the wire holder 70 of the wire assembly 7 is inserted into the holding hole 68 of the brush holder 6.
- the orientation of the wire rod holder 70 is adjusted so that the first fixing hole 731 communicates with the second fixing hole 691 and the recess 681.
- a screwdriver shaft is inserted from the second fixing hole 691, and the set screw 81 is tightened.
- the end of the set screw 81 is inserted into the second fixing hole 691 of the holding hole 68. It is made to contact
- the wire holder 70 is detachably attached to the holding hole 68 of the brush holder 6 by a screw-type fixing mechanism 7a including a female screw 731a and a set screw 81. Moreover, since the front-end
- said conditional expression is set for the following reasons.
- the radial distance from the axis L of the wire 50 positioned on the radial center side of the brush holder 6 in the bundle 51 is dr
- the radial distance from the brush holder 6 in the radial direction is d + r.
- the difference in peripheral speed between the wire rod 50 located on the radial center side of the brush holder 6 in the bundle 51 and the wire rod 50 located on the radially outer side of the brush holder 6 in the bundle 51 is the ratio of the radial distance. Equivalent to.
- the difference in peripheral speed can be made less than 20%.
- the difference in peripheral speed can be made less than 10%. 0.9 ⁇ (d ⁇ r) / (d + r) 0.9 (d + r) ⁇ (dr) 1.9r ⁇ 0.1d r ⁇ 0.0526d
- the shape of the holding hole 68 of the brush holder 6 is configured to be fitted to the wire rod holder 70 of the wire rod assembly 7. Therefore, the position where the wire rod holder 70 is attached to the brush holder 6 is the position of the central axis of the holding hole 68. Therefore, the radial distance d from the central axis (axis L) of the brush holder 6 at the position (center of the wire holder 70) where the wire holder 70 is attached in the brush holder 6 is the center axis (axis) of the brush holder 6. L) to the central axis of the holding hole 68.
- the wire aggregate 7 in which the wire 50 is a bundle 51 and the end is fixed to the wire holder 70 with an adhesive is used.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7a. For this reason, when it is necessary to reduce, add, or replace the plurality of wire aggregates 7 held by the brush holder 6, such a response can be easily performed.
- one brush-like grindstone 3 is provided.
- the number of bundles of wire rods can be made different according to the type of workpiece to be polished.
- a defect such as wear or breakage occurs in any of the plurality of bundles 51 of the wire 50, it is only necessary to replace the necessary bundle 51, and it is not necessary to discard the entire brush-like grindstone 3. Therefore, the cost required for the polishing process can be reduced.
- the brush holder 6 includes a disc-shaped bottom plate portion 61 and a cylindrical portion 63 protruding in the direction of the axis L from the outer peripheral side of the bottom plate portion 61, and a holding hole 68 is formed in the distal end surface 64 of the cylindrical portion 63. Yes. For this reason, even when the diameter of the brush holder 6 is increased, the weight of the brush holder 6 can be reduced. Further, the cylindrical portion 63 protrudes in the direction of the axis L from the outer peripheral side of the bottom plate portion 61, and the cylindrical portion 63 functions as a weight. Therefore, the brush holder 6 can be rotated in a stable state.
- the holding hole 68 is formed in the front end surface of the cylindrical part 63, the holding hole 68 can be formed in sufficient depth. Therefore, the wire assembly 7 can be attached to and detached from the holding hole 68 of the brush holder 6 by the screw type fixing mechanism 7a.
- the set screw 81 is attached in advance to the inside of the first fixing hole 731 as shown in FIG. In this state, the wire rod holder 70 can be fitted into the holding hole 68. Therefore, the work of attaching the brush holder 6 to the wire assembly 7 can be performed efficiently.
- FIG. 6 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Modification 1 of Embodiment 1 of the present invention. Note that the basic configuration of this embodiment and the embodiments described later are the same as those of the first embodiment. Therefore, common parts are shown with the same reference numerals and description thereof is omitted.
- the bundle 51 of the wire rods 50 configures the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7a using a set screw 81.
- a through hole 66 communicating with the holding hole 68 is formed in a portion of the brush holder 6 that overlaps the wire rod holder 70 on the other side L2 in the axis L direction. For this reason, when removing the wire assembly 7, the wire holder 70 can be pushed out from the holding hole 68 by a jig (not shown) inserted into the through hole 66 as indicated by an arrow P. Therefore, even when the outer diameter dimension of the cylindrical portion 72 of the wire rod holder 70 is set slightly smaller than the inner diameter dimension of the holding hole 68, the wire rod holder 70 can be easily removed from the holding hole 68.
- the jig may be configured to be inserted into only one through hole 66, but may be configured to be simultaneously inserted into a plurality of through holes 66. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
- the second fixing hole 691 extends in the direction of the axis L like the second fixing hole 692 shown in FIG. You may employ
- the wire rod holder 70 can be fitted into the holding hole 68 while being guided toward L2. Therefore, the wire rod holder 70 can be inserted into the holding hole 68 in a state in which the orientation of the wire rod assembly 7 is adjusted, so that the wire rod assembly 7 can be easily attached. Moreover, when removing the wire assembly 7, it is not necessary to completely pull out the set screw 81 from the first fixing hole 732 of the wire holder. That is, with the end of the set screw 8 protruding outward in the radial direction of the wire rod holder 70, the set screw 81 is held by the second fixing hole 691 while being guided from the other side L2 in the axis L direction toward the one side L1. The wire rod holder 70 can be removed from the hole 68. Therefore, the wire assembly 7 can be easily removed.
- FIG. 7 is an explanatory view of a screw type fixing mechanism used in the polishing brush 1 according to Embodiment 2 of the present invention.
- FIGS. 7A and 7B are a sectional view and a radial direction of the screw type fixing mechanism. It is the side seen from the outside.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70, as in the first embodiment.
- the body 7 is held in the holding hole 68 of the brush holder 6.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7b using a set screw 82.
- a first fixing hole 732 that penetrates the wire rod holder 70 in a direction orthogonal to the direction of the axis L is formed in the bottom 71 of the wire rod holder 70.
- the brush holder 6 has a second fixing hole 692 that penetrates from the outer peripheral surface of the brush holder 6 to the holding hole 68 and a first fixing hole 732 on the inner wall 689 of the holding hole 68 opposite to the second fixing hole 692.
- a third fixing hole 682 that is open at a position communicating with the first fixing hole 682 is formed.
- a female screw 682 a is formed on the inner peripheral surface of the third fixing hole 682, and a set screw 82 inserted into the first fixing hole 732 is fixed to the female screw 682 a.
- a screw with a head is used as the set screw 82, and the shaft portion 821 of the set screw 82 is located inside the first fixing hole 732 and the third fixing hole 682, and the head of the set screw 82. 822 is in contact with the outer peripheral surface of the wire rod holder 70. Further, as shown in FIG. 7B, the second fixing hole 692 extends in the axis L direction and reaches the end of the cylindrical portion 63.
- the wire rod holder 70 is detachably attached to the holding hole 68 of the brush holder 6 by the screw type fixing mechanism 7b including the female screw 682a and the set screw 82.
- the second fixing hole 692 is formed as a groove that is notched from the tip end face 64 side of the cylindrical portion 63 of the brush holder 6 and extends in the axis L direction.
- the set screw 82 is shallowly fitted in the wire rod holder 70, and the holding hole 68 is guided by the second fixing hole 692 while the shaft portion 821 of the set screw 82 is guided from one side L1 to the other side L2 in the axis L direction.
- the wire rod holder 70 can be fitted to the cable.
- the wire rod holder 70 can be fitted into the holding hole 68 in a state where the set screw 82 is fixed to the wire rod holder 70 in advance.
- the wire rod holder 70 can be inserted into the holding hole 68 with the orientation of the wire rod assembly 7 adjusted. Therefore, the wire assembly 7 can be easily attached.
- the shaft portion 821 of the set screw 82 is guided from the other side L2 in the axis L direction toward the one side L1 by the second fixing hole 692, and then the wire rod is inserted from the holding hole 68.
- the holder 70 can also be removed.
- the wire rod holder 70 can be removed from the holding hole 68 while the set screw 82 is fixed to the wire rod holder 70, the wire assembly 7 can be easily removed. Since other configurations are the same as those of the first embodiment, description thereof is omitted. In this embodiment, the through-hole 66 shown in FIG.
- FIG. 8 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Embodiment 3 of the present invention.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7 c using a set screw 83.
- the wire rod holder 70 is formed with a first fixing hole 733 that opens on the other side L2 in the direction of the axis L, and a female screw 733a is formed on the inner peripheral surface of the first fixing hole 733.
- a second fixing hole 693 communicating with the holding hole 68 is formed in a portion of the brush holder 6 that overlaps the wire rod holder 70 on the other side L2 in the axis L direction, and the head attached from the second fixing hole 693.
- the attached set screw 83 is fixed to the female screw 733 a of the first fixing hole 733.
- the wire rod holder 70 is detachably attached to the holding hole 68 of the brush holder 6 by the screw type fixing mechanism 7c including the female screw 733a and the set screw 83. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
- the wire assembly 7 when the wire assembly 7 is removed, the wire assembly 7 can be pushed out by a jig (not shown) inserted into the second fixing hole 693 instead of the through hole 66 shown in FIG. it can.
- FIG. 9 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Embodiment 4 of the present invention.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a screw type fixing mechanism 7d.
- a female screw 68 a is formed on the inner peripheral surface of the holding hole 68
- a male screw 70 a fixed to the female screw 68 a is formed on the outer peripheral surface of the wire rod holder 70.
- the wire rod holder 70 is detachably attached to the holding hole 68 of the brush holder 6 by the screw type fixing mechanism 7d including the female screw 68a and the male screw 70a. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
- FIG. 10 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Embodiment 5 of the present invention.
- the bundle 51 of the wire rods 50 configures the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire aggregate 7 is detachably attached to the holding hole 68 of the brush holder 6 by a magnet type fixing mechanism 7f using a magnet 7e.
- the wire rod holder 70 includes an iron-based metal portion and can be attracted to the magnet 7e.
- the wire rod holder 70 is entirely made of an iron-based metal portion.
- the brush holder 6 holds a magnet 7e that magnetically attracts the wire rod holder 70.
- the magnet 7e has a ring shape, and a through hole 66 communicating with the holding hole 68 passes through the inside of the magnet 7e at a portion of the brush holder 6 that overlaps the wire rod holder 70 on the other side L2 in the axis L direction. Is formed.
- the wire holder 70 is detachably attached to the holding hole 68 of the brush holder 6 by the magnet-type fixing mechanism 7f including the wire holder 70 made of iron-based metal and the magnet 7e. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
- the magnet 7e may be provided on the wire holder 70 side, but the cost can be reduced by providing an iron-based metal portion on the wire assembly 7 side which is a consumable item.
- FIG. 11 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Embodiment 6 of the present invention.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire aggregate 7 is detachably attached to the holding hole 68 of the brush holder 6 by a detachable fixing mechanism 7j using a stopper 7i.
- a stepped through hole 65 communicating with the holding hole 68 is formed in a portion of the brush holder 6 that overlaps the wire rod holder 70 on the other side L2 in the axis L direction. Further, a portion (first stepped portion 77 / supported portion) in which the outer diameter of the other side L2 is larger than the outer diameter of the one side L1 in the axis L direction is formed on the outer peripheral surface of the wire rod holder 70. The stepped portion 77 (supported portion) faces the one side L1 in the axis L direction. Further, a second step portion 680 (support portion) that supports the first step portion 77 on one side L1 is formed on the inner peripheral surface of the holding hole 68.
- a stopper 7i that presses the wire rod holder 70 attached to the holding hole 68 from the other side L2 toward the one side L1 through the through hole 65 is detachably fixed to the brush holder 6 with a screw 7k or the like.
- the stopper 7 i may be configured to fix one wire rod holder 70, but may be configured to fix a plurality of wire rod holders 70. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
- FIG. 12 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Modification 1 of Embodiment 6 of the present invention.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire aggregate 7 is detachably attached to the holding hole 68 of the brush holder 6 by a detachable fixing mechanism 7j using a stopper 7i.
- a portion (first tapered portion 78 / supported portion) in which the outer diameter of the other side L2 is larger than the outer diameter of one side L1 in the axis L direction is formed on the outer peripheral surface of the wire rod holder 70.
- the first taper portion 78 (supported portion) faces the one side L1 in the axis L direction.
- a second taper portion 685 (support portion) that supports the first taper portion 78 on one side L1 is formed on the inner peripheral surface of the holding hole 68.
- a stopper 7i that presses the wire rod holder 70 attached to the holding hole 68 from the other side L2 toward the one side L1 through the through hole 65 is detachably fixed to the brush holder 6 with a screw 7k or the like. Has been. Since other configurations are the same as those of the first and sixth embodiments, the description thereof is omitted.
- FIG. 13 is an explanatory diagram of the wire aggregate 7 used in the polishing brush 1 according to Modification 2 of Embodiment 6 of the present invention.
- the bundle 51 of the wire rods 50 constitutes the wire rod assembly 7 whose ends are held by the wire rod holder 70. In this state, it is held in the holding hole 68 of the brush holder 6.
- the wire aggregate 7 is detachably attached to the holding hole 68 of the brush holder 6 by a detachable fixing mechanism 7j using a stopper 7i.
- the wire rod holder 70 is formed with a portion facing the one side L1 in the axis L direction (end surface 79 / supported portion on the one side L1 in the cylinder portion 72 axis L direction).
- a projecting portion 686 (supporting portion) is formed on the peripheral surface so as to project inside the holding hole 68 and support the end surface 79 on one side L1.
- the end surface 79 is a tapered surface having an outer diameter on the other side L2 larger than the outer diameter on the one side L1 in the axis L direction, and the surface on the other side L2 in the axis L direction of the overhanging portion 686 is also Tapered surface.
- the brush holder 6 is provided with a stopper 7i having a convex portion 7r that presses the wire rod holder 70 attached to the holding hole 68 from the other side L2 toward the one side L1 through the through hole 65. It is detachably fixed by, for example. According to this configuration, after the wire rod assembly 7 is attached to the holding hole 68 from the other side L2 in the direction of the axis L, the wire rod assembly 7 is attached to the brush holder 6 by fixing the stopper 7i to the brush holder 6 in a detachable manner. Can be detachably attached to the holding hole 68. Since other configurations are the same as those of the first and sixth embodiments, the description thereof is omitted.
- FIG. 14 is an explanatory diagram of the polishing brush 1 according to the third modification of the sixth embodiment of the present invention.
- the wire assembly 7 of the present embodiment is the same as the wire assembly 7 of the second modification of the sixth embodiment.
- the wire assembly 7 is detachably attached to the holding hole 68 of the brush holder 6 by a detachable fixing mechanism 7j using a stopper 7i, as in the second modification of the sixth embodiment.
- the through hole 65 communicating with the holding hole 68 has no stepped portion.
- the stopper 7i includes a convex portion 7r inserted into the through hole 65 and a protruding portion 7s protruding from the through hole 65 to the other side L2. Further, the stopper 7i is detachably fixed to the bottom plate portion 61 of the brush holder 6 from the other side L2 by a screw 7k passing through the flange 7t provided in the protruding portion 7s. The stopper 7i fixed to the bottom plate portion 61 presses the wire rod holder 70 attached to the holding hole 68 from the other side L2 toward the one side L1 through the through hole 65.
- the wire rod assembly 7 is attached to the holding hole 68 from the other side L2 in the direction of the axis L, the wire rod assembly 7 is attached to the brush holder 6 by fixing the stopper 7i to the brush holder 6 in a detachable manner. Can be detachably attached to the holding hole 68. Since other configurations are the same as those of the second modification of the sixth embodiment, description thereof is omitted.
- FIG. 15 is a side view showing a part of the brush case 2 of the polishing brush 1 according to Embodiment 7 of the present invention.
- the support shaft 25 of the brush case 2 is provided with a stopper 9 that restricts the displacement of the wire 50 inward in the radial direction. More specifically, a disk-shaped stopper 9 is provided radially inward from the wire 50 shown in FIGS. 1 and 4. For this reason, when the polishing brush 1 is moved along the surface of the work while rotating, the wire 50 can be restricted from escaping radially inward of the brush case 2. Therefore, the contact pressure between the wire 50 and the workpiece can be maintained at an appropriate level.
- the wire rod holder 70 constituting the wire aggregate 7 includes a circular outer peripheral surface when viewed from the axial direction of the bundle 51 of the wire rods 50.
- the brush holder 6 when using the wire assembly 7 of a modified example including a holder portion that is not circular as the wire assembly 7, the brush holder 6 includes a fitting portion that fits the holder portion in the holding hole 68. To do.
- FIG. 16 is an explanatory diagram when the wire assembly 7 of a modified example is employed in the polishing brush 1 according to Modification 1 of Embodiment 1 shown in FIG.
- FIG. 16A is a perspective view of the modified wire rod assembly 7 as viewed from the other side L2
- FIG. 16B is an explanatory view of the mounting operation for holding the wire rod assembly 7 in the holding hole 68.
- FIG. is there.
- FIG. 16C is a cross-sectional view around the holding hole 68.
- FIG. 17 shows a modified screw-type fixing mechanism 7a in the case where the modified wire rod assembly 7 is employed in the polishing brush 1 according to Modified Example 1 of Embodiment 1.
- the wire assembly 7 of the modified example has a planar shape of the wire rod holder 70 when viewed from the axis L direction (contours of the bottom portion 71 and the cylinder portion 72 when viewed from the axis L direction). ) Is not circular.
- the planar shape of the wire rod holder 70 is defined by a first arc 73 and a second arc 74.
- the side surface of the wire rod holder 70 includes a first arc surface 73 a defined by the first arc 73 and a second arc surface 74 a defined by the second arc 74.
- the first arc 73 has a central angle of 240 ° or more.
- the second arc 74 connects one open end of the first arc 73 and the other open end.
- the radius of the second arc 74 is longer than the radius of the first arc 73, and the center of the second arc 74 coincides with the center line (axis L) of the brush holder 6 when the wire rod holder 70 is held in the holding hole 68. .
- the first fixing hole 731 provided in the wire holder 70 passes through a line connecting the center of the first arc 73 and the center of the second arc 74.
- the entire holding hole 68 is a fitting portion that fits with the wire holder 70.
- the holding hole 68 includes a first arc inner peripheral surface portion 68b defined by an arc corresponding to the first arc 73 and a second arc inner peripheral surface portion 68c defined by an arc corresponding to the second arc 74.
- the center of the arc that defines the second arc inner peripheral surface portion 68 c coincides with the center line (axis L) of the brush holder 6. Since other configurations are the same as those of the first modification of the first embodiment, the description thereof is omitted.
- the wire holder 70 can be prevented from rotating in the holding hole 68 by fitting the wire holder 70 and the holding hole 68. Therefore, the behavior of the wire aggregate 7 fixed to the brush holder 6 can be prevented from becoming unstable during polishing. Further, since the orientation of the wire rod holder 70 is defined when the wire rod holder 70 is inserted into the holding hole 68, it is easy to communicate the first fixing hole 731 with the second fixing hole 691 and the recess 681, and the wire assembly 7 Can be easily fixed to the brush holder 6.
- the wire rod assembly 7 (wire rod holder 70) can be prevented from rotating in the holding hole 68 due to the fitting of the wire rod holder 70 and the holding hole 68. Therefore, it is not necessary to prevent the wire rod holder 70 from rotating in the holding hole 68 by the set screw 81. Therefore, the wire assembly 7 can be fixed to the brush holder 6 by the screw type fixing mechanism 7w shown in FIG.
- a set screw positioning recess 735 is formed in the center portion in the circumferential direction of the first arc surface 73a of the wire rod holder 70, and a female screw is provided on the inner peripheral surface of the second fixing hole 691 of the brush holder 6. Form it.
- the set screw 81 is tightened into the second fixing hole 691, and the tip of the set screw 81 protruding from the second fixing hole 691 toward the wire rod holder 70 is positioned in the set screw positioning recess 735. Thereafter, the set screw 81 is further tightened and abutted against the wire rod holder 70, whereby the wire rod holder 70 is pressed against the inner wall 689 of the holding hole 68 to fix the wire rod assembly 7 to the brush holder 6.
- the wire rod holder 70 may be provided with a through hole that is smaller in diameter than the set screw 81 and penetrates in the direction perpendicular to the axis L direction, and the through hole can be used as a set screw positioning recess. Also, the set screw positioning recess can be omitted.
- the wire rod assembly 7 is attached to the brush holder 6 by the screw type fixing mechanism 7w. It is possible to fix to.
- a set screw positioning recess is provided on the outer peripheral surface of the wire rod holder 70, and the tip of the set screw 81 projecting from the second fixing hole 691 toward the wire rod holder 70 is placed in the set screw positioning recess 735. By positioning and further tightening, the wire assembly 7 (wire holder 70) is prevented from rotating in the holding hole 68.
- FIG. 18 is an explanatory diagram when the wire rod assembly 7 according to the modification is employed in the polishing brush 1 according to the modification 3 of the sixth embodiment.
- the planar shape of the wire holder 70 is defined by a first arc 73 and a second arc 74, as shown in FIG. 16.
- the side surface of the wire rod holder 70 includes a first arc surface 73 a defined by the first arc 73 and a second arc surface 74 a defined by the second arc 74.
- the first arc 73 has a central angle of 240 ° or more.
- the second arc 74 connects one open end of the first arc 73 and the other open end.
- the radius of the second arc 74 is longer than the radius of the first arc 73, and the center of the second arc 74 coincides with the center line (axis L) of the brush holder 6 when the wire rod holder 70 is held in the holding hole 68. .
- the entire holding hole 68 is a fitting portion that fits with the wire rod holder 70. Accordingly, the inner peripheral surface of the holding hole 68 is a second arc inner peripheral surface defined by the first arc inner peripheral surface portion 68b defined by the arc corresponding to the first arc 73 and the arc corresponding to the second arc 74. A portion 68c is provided.
- the through hole 65 communicating with the holding hole 68 also has the same shape as the holding hole 68 when viewed from the direction of the axis L. Further, the holding hole 68 and the through hole 65 are continuous without a step. Furthermore, in this example, the convex portion 7 r of the stopper 7 i is shaped to be inserted into the through hole 65. Other configurations are the same as those of the third modification of the sixth embodiment, and thus the description thereof is omitted.
- the wire assembly 7 can be attached to and detached from the holding hole 68 of the brush holder 6 by a detachable fixing mechanism 7j using a stopper 7i. It is attached.
- the wire holder 70 can be prevented from rotating in the holding hole 68 by fitting the wire holder 70 and the holding hole 68. Therefore, the behavior of the wire aggregate 7 fixed to the brush holder 6 can be prevented from becoming unstable during polishing.
- the planar shape of the wire rod holder 70 when viewed from the direction of the axis L is defined by the first arc 73 and the second arc 74.
- the plane shape of the wire rod holder 70 may be defined by a string (straight line) that connects one arc 73 and the open end of the first arc 73.
- the shape of the wire holder 70 when viewed from the direction of the axis L may be a polygonal shape.
- a holder portion having a non-circular shape may be provided in a part of the wire rod holder 70 in the direction of the axis L.
- the holder part of the shape which is not circular in the edge part on the opposite side to the side where the wire 50 extends in the wire holder 70 can be provided.
- a fitting portion that fits with the holder portion may be provided in a part of the holding hole 68.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Brushes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
距離dおよび半径rは、以下の条件式
r<0.111d
を満たしていることが好ましい。かかる構成によれば、ブラシホルダを中心軸線回りに回転させて研磨を行った際、束においてブラシホルダの径方向の中心側に位置する線材と束においてブラシホルダの径方向の外側に位置する線材とにおける周速の差を20%未満とすることができる。それ故、研磨を適正に行うことができる。
r<0.0526d
を満たしていることが好ましい。かかる構成によれば、ブラシホルダを中心軸線回りに回転させて研磨を行った際、束においてブラシホルダの径方向の中心側に位置する線材と束においてブラシホルダの径方向の外側に位置する線材とにおける周速の差を10%未満とすることができる。それ故、研磨を適正に行うことができる。
(全体構成)
図1は、本発明の実施の形態1に係る研磨ブラシにおいて、ブラシケースの内部にブラシ状砥石を固定した状態を模式的に示す説明図である。図2は、図1に示す研磨ブラシをブラシケースとブラシ状砥石とに分解した状態を模式的に示す分解斜視図である。
図3は、本発明の実施の形態1に係る研磨ブラシ1のブラシケース2の説明図であり、図3(a)、(b)は、ブラシケース2の一部(右半部)を切り欠いて示す側面図、およびブラシケース2を軸線方向の一方側からみた底面図である。
図4は、本発明の実施の形態1に係る研磨ブラシ1のブラシホルダ6の説明図であり、図4(a)、(b)は、ブラシホルダ6の一部(右半部)を切り欠いて示す側面図、およびブラシホルダ6を軸線方向の一方側からみた底面図である。
本形態の研磨ブラシ1を組み立てる際には、ブラシホルダ6の軸孔60に支軸25が嵌るようにブラシケース2の内側にブラシ状砥石3を挿入した後、ブラシケース2の外周側から2つの案内孔27にねじ29を通し、ねじ29をブラシホルダ6の穴67の雌ねじ670に止める。その際、ねじ29の先端部が支軸25の外周面に突き当たるまでねじ29を締め込む。その結果、ブラシケース2の内側において、ブラシホルダ6はねじ29を介してブラシケース2の支軸25上に固定される。本形態において、支軸25においてねじ29の先端部が突き当たる箇所は平坦面259になっている。ここで、ねじ29、案内孔27、穴67(雌ねじ670)を利用した固定部は、周方向に3個所以上、例えば、等角度間隔に3個所設けられることが好ましく、かかる構成によれば、研磨ブラシ1が大径化した場合でも、ブラシケース2にブラシ状砥石3を安定して固定することができる。
本形態の研磨ブラシ1は、ブラシケース2の上部で突き出ている駆動用連結軸21を介して研磨機に連結される。そして、研磨機において、研磨ブラシ1は、線材50の自由端の先端がワークに接する状態で軸線L周りに回転駆動され、各種ワークの研磨やバリ取り等に用いられる。かかる研磨の際、線材50は外周側に逃げようとしても、ブラシケース2の周壁23の内面に突き当たって逃げが抑制される。なお、研磨の際、研磨ブラシ1については、回転運動に限らず、往復動作、オシレーション動作、揺動、これらの動作を組み合わせた動きを行わせることもある。さらに、研磨ブラシ1を軸線L方向に上下移動させる動きを組み合わせることもある。
図5は、本発明の実施の形態1に係る研磨ブラシ1に用いた線材集合体7の説明図であり、図5(a)、(b)、(c)は、線材集合体7をブラシホルダ6に取り付ける前の状態の説明図、線材集合体7の線材ホルダ70をブラシホルダ6の保持穴68に挿入した状態の説明図、および線材集合体7の線材ホルダ70を保持穴68に止めねじ91によって固定した状態の説明図である。
図4(b)に示すように、本形態の研磨ブラシ1に用いたブラシ状砥石3において、ブラシホルダ6において線材ホルダ70が取り付けられている位置(線材ホルダ70の中心)のブラシホルダ6の中心軸線(軸線L)からの径方向の距離をdとし、束51の半径をrとしたとき、
距離dおよび半径rは、以下の条件式
r<0.111d
を満たしている。このため、ブラシ状砥石3(ブラシホルダ6)を中心軸線回りに回転させて研磨を行った際、束51においてブラシホルダ6の径方向の中心側に位置する線材50と束51においてブラシホルダ6の径方向の外側に位置する線材50とにおける周速の差を20%未満とすることができる。それ故、研磨を適正に行うことができる。
0.8<(d-r)/(d+r)
0.8(d+r)<(d-r)
1.8r<0.2d
r<0.111d
0.9<(d-r)/(d+r)
0.9(d+r)<(d-r)
1.9r<0.1d
r<0.0526d
本形態のブラシ状砥石3および研磨ブラシ1を用いた研磨工程において、ブラシホルダ6に保持された複数の線材集合体7のいずれかに、線材50の磨耗、折れる等の不具合が発生したとき、止めねじ81を緩め、不具合が発生した線材集合体7をブラシホルダ6から取り外し、別の線材集合体7をブラシホルダ6に取り付けて研磨工程を行う。また、ブラシホルダ6に保持された複数の線材集合体7の全てが磨耗した場合には、止めねじ81を緩めて線材集合体7を全て交換した後、研磨工程を行う。
本形態のブラシ状砥石3および研磨ブラシ1を用いた研磨工程において、ワークの種類が変わって、線材集合体7の本数を減らす必要が発生した場合には、止めねじ81を緩め、一部の線材集合体7をブラシホルダ6から取り外して研磨工程を行う。また、ワークの種類が変わって、線材集合体7の本数を増やす必要が発生した場合には、止めねじ81で線材集合体7をブラシホルダ6に取り付けて研磨工程を行う。
以上説明したように、本形態のブラシ状砥石3および研磨ブラシ1では、線材50が束51になって端部が線材ホルダ70に接着剤により固定された線材集合体7が用いられており、かかる線材集合体7は、ねじ式固定機構7aによって、ブラシホルダ6の保持穴68に着脱可能に取り付けられている。このため、ブラシホルダ6に保持された複数の線材集合体7の削減、追加、交換の必要が発生したとき、かかる対応を容易に行うことができる。従って、ブラシホルダ6を大径化するとともに、線材50の束51をブラシホルダ6の広い領域にわたって多数設けることによりワークの広い領域を効率よく研磨する構成とした場合でも、1つのブラシ状砥石3で、研磨対象となるワークの種類等に応じて線材の束の本数が相違させることができる。また、線材50の複数の束51のいずれかに磨耗、折れ等の不具合が発生した場合でも、必要な束51のみを交換すればよく、ブラシ状砥石3全体を廃棄する必要がない。それ故、研磨工程でかかる費用の低減を図ることができる。
図6は、本発明の実施の形態1の改良例1に係る研磨ブラシ1に用いた線材集合体7の説明図である。なお、本形態および後述する実施の形態は、いずれも基本的な構成が実施の形態1と同様である。従って、共通する部分には同一の符号を付して図示し、それらの説明を省略する。
実施の形態1および実施の形態1の改良例1において、第2固定穴691が、図7(b)に示す第2固定穴692のように、軸線L方向に延在し、円筒部63の端部まで届いている構成を採用してもよい。すなわち、本例では、第2固定穴692は、ブラシホルダ6における円筒部63の先端面64の側から切り欠かれて軸線L方向に延びる溝として形成されている。かかる構成によれば、線材ホルダ70の径方向外側に止めねじ8の端部(軸部分)が突出した状態で、第2固定穴691によって止めねじ81を軸線L方向の一方側L1から他方側L2に向けてガイドしながら保持穴68に線材ホルダ70を嵌めることができる。それ故、線材集合体7の向きを調整した状態で、線材ホルダ70を保持穴68に挿入することができるので、線材集合体7の取り付けが容易である。また、線材集合体7を取り外す際には、止めねじ81を線材ホルダの第1固定穴732から完全に引き抜く必要がない。すなわち、線材ホルダ70の径方向外側に止めねじ8の端部が突出した状態で、第2固定穴691によって止めねじ81を軸線L方向の他方側L2から一方側L1に向けてガイドしながら保持穴68から線材ホルダ70を取り外すことができる。それ故、線材集合体7の取り外しが容易である。
図7は、本発明の実施の形態2に係る研磨ブラシ1に用いたねじ式固定機構の説明図であり、図7(a)、(b)は、ねじ式固定機構の断面図および径方向外側からみた側面である。
図8は、本発明の実施の形態3に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図9は、本発明の実施の形態4に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図10は、本発明の実施の形態5に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図11は、本発明の実施の形態6に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図12は、本発明の実施の形態6の変形例1に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図13は、本発明の実施の形態6の変形例2に係る研磨ブラシ1に用いた線材集合体7の説明図である。
図14は、本発明の実施の形態6の変形例3に係る研磨ブラシ1の説明図である。本形態の線材集合体7は、実施の形態6の変形例2の線材集合体7と同一である。線材集合体7は、実施の形態6の変形例2と同様に、止め具7iを利用した着脱式の固定機構7jによって、ブラシホルダ6の保持穴68に着脱可能に取り付けられている。
図15は、本発明の実施の形態7に係る研磨ブラシ1のブラシケース2の一部を切り欠いて示す側面図である。
上記の例では、線材集合体7を構成する線材ホルダ70は、線材50の束51の軸線方向から見た場合に円形の外周面を備える。これに対して、外周面に雄ねじ70a形成された実施の形態4の線材集合体7を除く他の線材集合体7では、線材ホルダ70が軸線L方向から見た場合に円形ではないホルダ部分を備えるものとしてもよい。ここで、線材集合体7として円形ではないホルダ部分を備える変形例の線材集合体7を用いる場合には、ブラシホルダ6は、保持穴68にホルダ部分と嵌合する嵌合部を備えるものとする。
Claims (31)
- 線材の束と、該束が複数、ブラシホルダに保持されたブラシ状砥石を用いた研磨方法であって、
前記束の端部を線材ホルダに固定して線材集合体を構成するとともに、前記ブラシホルダにおいて軸線方向の一方面側で開口する複数の保持穴の各々に前記線材ホルダを着脱可能に取り付けて前記ブラシ状砥石を構成し、
研磨工程を行う際、前記ブラシホルダに保持された複数の前記線材集合体の削減、追加または交換の必要が発生したときには、前記ブラシホルダからの前記線材集合体の取り外し、および前記ブラシホルダへの取り付けの少なくとも一方を行った後、前記研磨工程を行うことを特徴とする研磨方法。 - 多数本の線材が束になって端部が線材ホルダに固定された線材集合体と、
軸線方向の一方面側で複数の保持穴が開口し、当該複数の保持穴の各々に前記線材ホルダが着脱可能に取り付けられたブラシホルダと、
を有することを特徴とするブラシ状砥石。 - 前記ブラシホルダは、円盤状の底板部と、該底板部の外周側から前記軸線方向の前記一方面側に突出した円筒部と、を備え、前記円筒部の先端面に前記保持穴が形成されていることを特徴とする請求項2に記載のブラシ状砥石。
- 前記ブラシホルダにおいて前記線材ホルダが取り付けられている位置の当該ブラシホルダの中心軸線からの径方向の距離をdとし、前記束の半径をrとしたとき、
距離dおよび半径rは、以下の条件式
r<0.111d
を満たしていることを特徴とする請求項2に記載のブラシ状砥石。 - 前記距離dおよび前記半径rは、以下の条件式
r<0.0526d
を満たしていることを特徴とする請求項4に記載のブラシ状砥石。 - 前記線材ホルダは、前記軸線方向から見た場合に円形ではないホルダ部分を備えており、
前記ブラシホルダは、前記保持穴に前記線材ホルダが挿入されたときに前記ホルダ部分と嵌合する嵌合部を備えることを特徴とする請求項2に記載のブラシ状砥石。 - 前記線材ホルダは、前記保持穴にねじ式固定機構によって前記ブラシホルダに着脱自在に取り付けられていることを特徴とする請求項2に記載のブラシ状砥石。
- 前記ブラシホルダには、当該ブラシホルダの外周面から前記保持穴まで貫通する固定穴が形成され、
前記ねじ式固定機構は、前記固定穴の内周面に形成された雌ねじと、前記固定穴の内部で前記雌ねじに止められて前記線材ホルダに当接する止めねじと、を備えていることを特徴とする請求項7に記載のブラシ状砥石。 - 前記止めねじは、その先端が前記線材ホルダの外周面に設けられた止めねじ位置決め用凹部内に位置することを特徴とする請求項8に記載のブラシ状砥石。
- 前記線材ホルダにおいて前記線材が延在している側とは反対側に位置する部分には、当該線材ホルダを前記軸線方向と直交する方向に貫通する第1固定穴が形成され、
前記ブラシホルダには、当該ブラシホルダの外周面から前記保持穴まで貫通する第2固定穴が形成され、
前記ねじ式固定機構は、前記第1固定穴の内周面に形成された雌ねじと、前記第1固定穴の内部で前記雌ねじに止められて前記保持穴の前記第2固定穴とは反対側の内壁に当接する止めねじと、を備えていることを特徴とする請求項7に記載のブラシ状砥石。 - 前記第2固定穴は、前記ブラシホルダにおける前記軸線方向の一方面側から切り欠かれて当該軸線方向に延びる溝として形成されていることを特徴とする請求項10に記載のブラシ状砥石。
- 前記線材ホルダにおいて前記線材が延在している側とは反対側に位置する部分には、当該線材ホルダを前記軸線方向と直交する方向に貫通する第1固定穴が形成され、
前記ブラシホルダには、当該ブラシホルダの外周面から前記保持穴まで貫通する第2固定穴と、前記保持穴の前記第2固定穴とは反対側の内壁において前記第1固定穴と連通する位置で開口する第3固定穴と、が形成され、
前記ねじ式固定機構は、前記第3固定穴の内周面に形成された雌ねじと、前記第1固定穴を貫通して前記雌ねじに止められた止めねじと、を備えていることを特徴とする請求項7に記載のブラシ状砥石。 - 前記第2固定穴は、前記ブラシホルダにおける前記軸線方向の一方面側から切り欠かれて当該軸線方向に延びる溝として形成されていることを特徴とする請求項12に記載のブラシ状砥石。
- 前記線材ホルダには、前記軸線方向の他方側の面で開口する第1固定穴が形成され、
前記ブラシホルダにおいて前記線材ホルダに前記他方側で重なる部分には、前記保持穴に連通する第2固定穴が形成され、
前記ねじ式固定機構は、前記第1固定穴に形成された雌ねじと、前記第2固定穴を貫通して前記雌ねじに止められた止めねじと、を備えていることを特徴とする請求項7に記載のブラシ状砥石。 - 前記ねじ式固定機構は、前記保持穴の内周面に形成された雌ねじと、前記線材ホルダの外周面に形成された雄ねじと、を備えていることを特徴とする請求項7に記載のブラシ状砥石。
- 前記線材ホルダは、前記保持穴に磁石式固定機構によって前記ブラシホルダに着脱自在に取り付けられていることを特徴とする請求項2に記載のブラシ状砥石。
- 前記線材ホルダは、鉄系の金属部分を含み、
前記ブラシホルダには、前記線材ホルダを磁気吸引する磁石が保持されていることを特徴とする請求項16に記載のブラシ状砥石。 - 前記ブラシホルダにおいて前記軸線方向の前記一方面側とは反対の他方面側で当該軸線方向から見た場合に前記線材ホルダと重なる部分には、前記保持穴に連通する貫通穴が形成されていることを特徴とする請求項2に記載のブラシ状砥石。
- 前記ブラシホルダにおいて前記軸線方向の前記一方面側とは反対の他方面側で当該軸線方向から見た場合に前記線材ホルダと重なる部分には、前記保持穴に連通する貫通穴が形成され、
前記線材ホルダには、前記軸線方向において前記線材が延在している側に向く被支持部が形成され、
前記保持穴の内周面には前記被支持部を前記線材が延在している側で支持する支持部が形成され、
前記ブラシホルダには、前記保持穴に装着された前記線材ホルダを前記貫通穴を介して前記線材が延在している側とは反対側から前記線材が延在している側に向けて押圧する止め具が着脱可能に固定されていることを特徴とする請求項2に記載のブラシ状砥石。 - 前記線材は、無機長繊維の集合糸に樹脂を含浸、固化させてなることを特徴とする請求項2に記載のブラシ状砥石。
- 請求項2に記載のブラシ状砥石を有する研磨ブラシであって、
前記ブラシ状砥石の前記軸線方向の位置を調整可能に当該ブラシホルダを保持するブラシケースを有することを特徴とする研磨ブラシ。 - 前記ブラシケースには、該ブラシケースの内側で前記軸線方向に延びた支軸と、前記ブラシケースの周壁で前記軸線方向に溝状に延びた案内孔と、が形成され、
前記ブラシホルダには、前記支軸が嵌る軸孔と、当該ブラシホルダの外周面から前記軸孔まで届くねじ孔と、が形成され、
ねじが、ねじ軸の先端部が前記支軸の外周面に突き当たる状態に前記ねじ孔に止められていることを特徴とする請求項21に記載の研磨ブラシ。 - 前記支軸には、当該支軸を前記軸線方向に貫通する流路が形成されていることを特徴とする請求項22に記載の研磨ブラシ。
- 前記支軸には、前記線材の径方向内側への変位を規制するストッパが設けられていることを特徴とする請求項22に記載の研磨ブラシ。
- 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダは、前記束の軸線方向から見た場合に円形ではないホルダ部分を備えることを特徴とする線材集合体。 - 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダには、軸線方向において前記線材が延在している側とは反対側に位置する部分に、当該線材ホルダを前記軸線方向と直交する方向に貫通する固定穴が形成されていることを特徴とする線材集合体。 - 前記固定穴の内周面には雌ねじが形成されていることを特徴とする請求項26に記載の線材集合体。
- 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダには、軸線方向において前記線材が延在している側とは反対側の面で開口する固定穴が形成され、当該固定穴の内周面には雌ねじが形成されていることを特徴とする線材集合体。 - 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダは、鉄系の金属部分を含んでいることを特徴とする線材集合体。 - 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダの外周面には、軸線方向において前記線材が延在している側の外径より前記線材が延在している側とは反対側の外径を大とする部分が形成されていることを特徴とする線材集合体。 - 無機長繊維の集合糸に樹脂を含浸、固化させてなる多数本の線材と、
該多数本の線材が束になって端部が固定された線材ホルダと、
を有し、
前記線材ホルダは、外周面に雄ねじを備えることを特徴とする線材集合体。
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US14/917,355 US10058973B2 (en) | 2013-09-13 | 2014-09-12 | Polishing method, brush-like grinding stone, polishing brush, and linear member aggregate |
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US15/927,054 US10751850B2 (en) | 2013-09-13 | 2018-03-20 | Polishing method, brush-like grinding stone, polishing brush, and linear member aggregate |
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US15/927,050 Division US10828744B2 (en) | 2013-09-13 | 2018-03-20 | Polishing method, brush-like grinding stone, polishing brush, and linear member aggregate |
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