A wire-shaped grinding element (10) is used as a grinding element for a polishing brush. The wire-shaped grinding element (10) includes inorganic filaments and a resin that impregnates the inorganic filaments and is cured. The inorganic filaments contain 80 to 90% by weight of an alumina component and 20 to 10% by weight of a silica component. The crystal structure of the inorganic filaments includes mullite crystals and intermediate lumina. The mullite crystals have an average grain size smaller than 25 nm.
Provided is a polishing brush (1A) wherein, when a workpiece (W) is polished, a shank (6) is rotated in a first rotation direction (R1) and respective tip end parts of brushes (3) are brought into contact with the workpiece (W). A plurality of brush holding holes (4) provided to a brush holder 2 each have a central axis (L1) that extends from the bottom surface (4b) of that brush holding hole (4) and toward an opening (4a), in the opposite direction from the first rotation direction (R1). The brushes (3) each have a plurality of linear abrasive members (10) and a resin member (11) that bundles and fixes base end portions of the plurality of linear abrasive members (10). Each resin member (11) is positioned inside a brush holding hole (4). An end surface (11a) of the resin member (11) toward the opening (4a) of the brush holding hole (4) is orthogonal to the central axis (L1). An abrasive member bundle (12) constituted by a plurality of linear abrasive members (10) extends from the opening (4a) of a brush holding hole (4) and in the opposite direction from the first rotation direction (R1).
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24B 29/00 - 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
This polishing brush (1) comprises a brush holder (2) and a brush (3). The brush holder (2) has a shank (5) of which a base-end portion is connected to a tool post of a lathe, and a brush-holding member (6) that is supported by a distal-end portion of the shank (5). The brush (3) is held by the brush-holding member (6) so as to enable mounting in and dismounting from a brush-holding hole (7) that is provided to an annular outer-peripheral surface (33) around a Y axis orthogonal to the axis of the shank (5), the brush (3) protruding radially outward from the brush-holding member (6). The brush holder (2) is provided with a positioning mechanism (60) that positions the brush-holding member (6) at a plurality of rotation-angle positions, and a fixing mechanism (60) that fixes the positioned brush-holding member (6) to the shank (5).
B24B 29/00 - 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
4.
METHOD OF CONTROLLING POLISHING TOOL HOLDER, POLISHING TOOL HOLDER,
AND POLISHING DEVICE
A polishing tool holder (4) of a polishing device (1) has a shank (6), an attachment part (21) to which a polishing tool (3) is attached, a movement mechanism (22) including a motor (35) configured to move the attachment part (21) in an axial direction (X) of the shank (6), a load detector (23) configured to detect a load exerted on the polishing tool (3) attached to the attachment part (21), and a control unit (52) configured to control driving of the motor (35). The control unit (52) monitors an output from the load detector (23) and successively calculates the amount of change of the load, and performs a projection control operation of driving the motor (35) based on the load and the amount of change to advance or retract the polishing tool (3) attached to the attachment part (21).
B24B 51/00 - Arrangements for automatic control of a series of individual steps in grinding a workpiece
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A work (1) is rotationally symmetric with respect to an axis (L0), and a section of a surface (5) thereof to be polished which is formed by cutting the surface (5) along a virtual plane containing the axis (L0) includes a circular arc (5a) which extends from the intersection with the axis (L0) toward one side of the axis (L0) over an angle exceeding 120°. When polishing the work (1) with a rotating brush (10), the work (1) is rotated around the axis (L0) and, simultaneously therewith, the rotating brush (10) is rotated and pressed against the surface (5) to be polished and is moved along the circular arc (5a) while the rotation axis (L1) of the rotating brush (10) is kept perpendicular to the contact surface of the surface (5) to be polished. The rotational direction (R2) of the rotating brush (10) is opposite to the rotational direction (R1) of the work (1) in the forward side along the moving direction (M1) of the rotating brush (10), when the surface (5) to be polished and the rotating brush (10) are viewed from the rotation axis (L1) direction along the rotation axis (L1).
B24B 29/00 - 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
B24B 11/00 - Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
B24B 29/04 - 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 designed for particular workpieces for rotationally symmetrical workpieces, e.g. ball-, cylinder- or cone-shaped workpieces
B24B 37/025 - Lapping machines or devices; Accessories designed for working surfaces of revolution designed for working spherical surfaces
An end (17) of a stick grindstone (10) is pressed against a surface (S) to be polished of a work (W) to polish the surface (S) to be polished. The stick grindstone (10) comprises inorganic long fibers (15) and a resin having infiltrated into the inorganic long fibers (15) and cured. The inorganic long fibers (15) comprise 80-90 wt% alumina component and 20-10 wt% silica component. The inorganic long fibers (15) have a crystalline structure comprising mullite crystals and an intermediate alumina. The mullite crystals have an average grain diameter of less than 25 nm.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
B24B 23/02 - Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
B24B 23/04 - Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
B24D 3/02 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
An abrasive stick (10) according to examples 1 and 2 is for grinding a grinding surface (S) of a workpiece (W) by pressing a tip end part (17) thereof against the grinding surface (S). The abrasive stick (10) according to examples 1 and 2 comprises inorganic long fibers (15) and a resin (16) that is impregnated in the inorganic long fibers (15) and cured. The inorganic long fibers (15) comprise 80-90 wt% of an alumina component and 20-10 wt% of a silica component. The crystal structure of the inorganic long fibers (15) includes intermediate alumina. The silica component is in a non-crystalline state. The BET specific surface area of the inorganic long fibers (15) is not more than 30 m2/g.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
B24B 23/02 - Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
B24B 23/04 - Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
B24B 29/00 - 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
B24B 1/00 - Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
B24B 9/04 - Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
B24B 29/08 - 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 designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction the cross-section being circular, e.g. tubes, wires, needles
A grindstone with an axis (1) comprises a grindstone (2), and a shaft (3) extending from the grindstone (2). The grindstone (2) is formed by bonding a plurality of fiber bundles (22), which are bundles of a plurality of inorganic long fibers (21), with a resin (23). The shaft (3) satisfies a conditional formula (A) where S represents rigidity. When a 30 mm area from a rear end of the shaft (3) is secured as a shank part (4), a rear end of an outer peripheral edge (2a) of the grindstone (2) is pushed in from a direction perpendicular to an axis line (L), a push-in load is represented by F (N), and a displacement amount of a front end of the shaft 3 is represented by δ (mm), the rigidity of the shaft (3) is given by formula (B) below. 0.4 ≤ S ≤ 100 ・・ (A) S = F / δ ・・ (B)
B24B 23/02 - Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
B25F 5/00 - COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR - Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
10.
LINEAR ABRASIVE MEMBER FOR POLISHING BRUSH, AND POLISHING BRUSH
Linear abrasive members (10) are used as abrasive members for a polishing brush. The linear abrasive members (10) comprise inorganic long fibers and a resin which is cured after having the inorganic long fibers immersed therein. The inorganic long fibers comprise 80-90 wt% of an alumina component and 20-10 wt% of a silica component. The crystalline structure of the inorganic long fibers comprises mullite crystals and an intermediate alumina. The average particle size of the mullite crystals is less than 25 nm.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
Linear abrasive members (10A, 10B) are used as abrasive members for a polishing brush. The linear abrasive members (10A, 10B) comprise inorganic long fibers and a resin which is cured after having the inorganic long fibers immersed therein. The inorganic long fibers comprise 80-90 wt% of an alumina component and 20-10 wt% of a silica component. The crystalline structure of the inorganic long fibers has an intermediate alumina and the silica component is in a non-crystalline state. The BET specific surface area of the inorganic long fibers is at most 30 m2/g.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
A grinder holder (4) of an grinding tool (1) comprises: a shank (6); a mounting part (21) whereon a grinder (3) is mounted; a movement mechanism (22) that is equipped with a motor (35) and causes the mounting part (21) to move in the axial direction (X) of the shank (6); a load detector (23) that detects a load acting on the grinder (3) mounted on the mounting part (21); and a control unit (52) that drives and controls the motor (35). The control unit (52) monitors the output from the load detector (23) and successively calculates the amount of change in the load, and drives the motor (35) on the basis of the load and the amount of change, thereby performing a projection control operation in which the grinder (3) mounted on the mounting part (21) is made to advance or retreat.
B24B 45/00 - Means for securing grinding wheels on rotary arbors
B24B 47/20 - Drives or gearings for grinding machines or devices; Equipment therefor relating to feed movement
B24D 7/00 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 29/00 - 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
This polishing brush (1) has a rod-form member (2), and an abrasive-material bundle (4) comprising a plurality of linear abrasive materials (3). In the rod-form member (2), a holding hole (6) for holding the abrasive-material bundle (4) is provided in a front-side portion (2a). The holding hole (6) is provided with a bottom surface (7), and a tubular peripheral wall surface (8) extending from the bottom surface (7) in a sloping direction (S). The abrasive-material bundle (4) is provided with an accommodation portion (4a) accommodated in the holding hole (6), and a protruding portion (4b) that protrudes in the sloping direction (S) from the opening (6a) of the holding hole (6). The distal end of the protruding portion (4b) is positioned on the outer side of the rod-form member (2) as seen from an axis (L0) direction.
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
B24B 29/00 - 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
A polishing device (1) includes a polishing brush (3) and a polishing brush holder (4) that holds the polishing brush (3). The polishing brush holder (4) includes a shank (6), a support mechanism (21) that has a sleeve (7) and supports the polishing brush (3) so as to be movable in an axial direction L of the shank (6), and a moving mechanism (22) that moves the polishing brush (3) in the axial direction L. The polishing brush holder (4) includes a pressure sensor (53) that detects a load (sensor detection pressure (P)) applied from a workpiece (W) to the polishing brush (3) when the workpiece (W) is polished by the polishing brush (3) supported by the support mechanism (21), and a control unit (51) that drives the moving mechanism (22) on the basis of the output (sensor detection pressure (P)) from the pressure sensor (53) to move the polishing brush (3) in the axial direction L.
A polishing brush (1) has a plurality of whetstone posts (7) that are arranged in an annular fashion in parallel around an axis line L, and a holder (21) to hold the base ends of the whetstone posts (7). During polishing work in which a workpiece W face (41) to be polished that comprises a convex curved face is polished using the polishing brush (1), the axis line L of the polishing brush (1) is inclined with respect to the normal vector (43) of a section (42) of the face (41) to be polished that is in contact with the whetstone post (7) tips.
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
a) adjacent to the holding holes 16 at a first direction (L1) side in the rotational center line direction orthogonal to the circumferential direction R (R) in opening edges of the holding holes (16) in the grinding element bundle-holding surface (12). The first protrusions (18) are continuous in the circumferential direction R (R) to configure an annular first flange portion (19).
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 13/04 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising a plurality of flaps or strips arranged around the axis
B24D 9/04 - Rigid drums for carrying flexible material
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for
B24D 11/00 - Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
A polishing device (1) includes a polishing brush (3) and a polishing brush holder (4) that holds the polishing brush (3). The polishing brush holder (4) includes a shank (6), a support mechanism (21) that has a sleeve (7) and supports the polishing brush (3) so as to be movable in an axial direction L of the shank (6), and a moving mechanism (22) that moves the polishing brush (3) in the axial direction L. The polishing brush holder (4) includes a pressure sensor (53) that detects a load (sensor detection pressure (P)) applied from a workpiece (W) to the polishing brush (3) when the workpiece (W) is polished by the polishing brush (3) supported by the support mechanism (21), and a control unit (51) that drives the moving mechanism (22) on the basis of the output (sensor detection pressure (P)) from the pressure sensor (53) to move the polishing brush (3) in the axial direction L.
B24B 49/16 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A polishing device (1) includes a polishing brush (3) and a polishing brush holder (4) that holds the polishing brush (3). The polishing brush holder (4) includes a shank (6), a support mechanism (21) that has a sleeve (7) and supports the polishing brush (3) so as to be movable in an axial direction L of the shank (6), and a moving mechanism (22) that moves the polishing brush (3) in the axial direction L. The polishing brush holder (4) includes a pressure sensor (53) that detects a load (sensor detection pressure (P)) applied to the polishing brush (3) from a workpiece (W) when the workpiece (W) is polished by the polishing brush (3) supported by the support mechanism (21), and a control unit (51) that drives the moving mechanism (22) on the basis of the output (sensor detection pressure (P)) from the pressure sensor (53) to move the polishing brush (3) in the axial direction L.
B24B 49/16 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
Provided is a program capable of determining a machining condition suitable for a finish state after machining. The machining-condition determination program is for determining, in a computer device, a machining condition for machining of an edge portion of an object to be machined with a tool, the machine-condition determination program causing the computer device to function as: a target quality input receiving means (S3) for receiving an input of a target edge quality related to a target quality of the edge portion; and a specifying-element determining means (S5) for determining a positional-relationship specifying element suitable for the received target edge quality, on the basis of the correspondence between a positional-relationship specifying element for specifying the positional relationship between the tool position and the edge portion during machining, and a predicted post-machining edge quality which is predicted in a case where the edge portion is machined on the tool track such that the positional relationship specified by the positional-relationship specifying element is obtained.
G05B 19/404 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
B23C 3/12 - Trimming or finishing edges, e.g. deburring welded corners
B23Q 15/22 - Control or regulation of position of tool or workpiece
A brush-like grinding stone (3) in a polishing brush (1) includes a brush holder (6) and a linear member aggregate (7) detachably held in the brush holder (6). The linear member aggregate (7) includes a large number of bundles (51) of the linear members (50) obtained by hardening aggregated yarn of inorganic filaments impregnated with a resin, and a brush holder (70) holding ends of the bundles (51). A linear member holder (70) in the linear member aggregate (7) is detachably attached to each of a plurality of holding holes (68) that is open in one side in an axial line direction L. In a case where any of the linear member aggregates has a failure, such as breakage, only the failed linear member aggregate needs to be replaced. Thus, it is not necessary to discard the entire brush-like grinding stone. Consequently, the polishing cost can be reduced.
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24D 13/18 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
A46B 7/04 - Bristle carriers arranged in the brush body interchangeably
23.
Polishing method, brush-like grinding stone, polishing brush, and linear member aggregate
A brush-like grinding stone (3) in a polishing brush (1) includes a brush holder (6) and a linear member aggregate (7) detachably held in the brush holder (6). The linear member aggregate (7) includes a large number of bundles (51) of the linear members (50) obtained by hardening aggregated yarn of inorganic filaments impregnated with a resin, and a brush holder (70) holding ends of the bundles (51). A linear member holder (70) in the linear member aggregate (7) is detachably attached to each of a plurality of holding holes (68) that is open in one side in an axial line direction L. In a case where any of the linear member aggregates has a failure, such as breakage, only the failed linear member aggregate needs to be replaced. Thus, it is not necessary to discard the entire brush-like grinding stone. Consequently, the polishing cost can be reduced.
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24D 13/18 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
A46B 7/04 - Bristle carriers arranged in the brush body interchangeably
A wheel brush (1) comprises: an abrasive material bundle holder (3) including an annular abrasive material bundle holding surface (12) facing the outer circumferential side; and a plurality of abrasive material bundles (4) each formed of multiple strands of a linear abrasive material (5) bundled together. The abrasive material bundle holding surface (12) has a plurality of holding holes (16) arranged in the circumferential direction (R). The abrasive material bundles (4) protrude from the abrasive material bundle holding surface (12) toward the outer circumferential side while one end of each of the abrasive material bundles (4) is inserted in the corresponding holding hole (16). First protrusions (18) protruding toward the outer circumferential side are provided on respective first opening edge portions (17a) that are each adjacent, in a first direction (L1) of the rotation center axial direction orthogonal to the circumferential direction (R), to the corresponding holding hole (16) at an opening edge, of the holding hole (16), on the abrasive material bundle holding surface (12). The first protrusions (18) are continuous, in the circumferential direction (R), with each other to form a first flange portion (19).
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 11/00 - Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
A polishing brush (1) includes a brush-shaped grindstone (12) holding grinding element bundles (11) of wire-shaped grinding elements (27) in an annular shape and a grinding element displacement-restricting member (13) for restricting displacement of the grinding element bundles (11) outward. The brush-shaped grindstone (12) has a grinding element holder (15) holding the base end portions (upper end portions) of the grinding element bundles (11). The grinding element displacement-restricting member (13) has an annular part (33) surrounding the wire-shaped grinding elements (27) from the outer peripheral side at a position between the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15) in the direction of the axis of center of rotation (L) and at a distance away from the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15). Since the portions on the side closer to the grinding element holder (15) of the grinding element bundles (11) held in the grinding element holder (15) are exposed outward, cutting fluid or air supplied from the outer peripheral side of the polishing brush (1) easily reaches the polished portion of a workpiece.
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24D 13/18 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
B24D 13/16 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
A polishing brush unit (1) comprises a polishing brush 2 having: a spindle (5) that has a rear end connected to a machine tool; a plurality of abrasive material bundles (6) made by bundling a plurality of linear abrasive materials (18) which extend in the direction of the axis (L) of the spindle (5); and a holder (9) that is detachably fixed to the spindle (5), and is provided with a spindle hole (7) into which the spindle (5) is inserted in the longitudinal direction X and a holding portion (8) which holds the rear ends of the plurality of abrasive material bundles (6) arranged annularly around the axis (L). The polishing brush unit (1) is also equipped with an abrasive material displacement restricting member (3) which is provided with: an outside restriction portion (56) that is located on the outer peripheral side of the plurality of abrasive material bundles (6) between the holder (9) and the front ends of the abrasive material bundles (6) in the longitudinal direction X so as to restrict the displacement of the front ends of the abrasive material bundles (6) to the outer peripheral side; and a fixed portion (41) that is fixed on the spindle (5) to the front of the holder (9).
B24B 29/00 - 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
c) and the axis of center of rotation (L) of the grinding element holder (7) and extends in a radial direction. The wire-shaped grinding elements (28) included in the grinding element bundle (9) are easily displaced and can release excessive force applied thereto.
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24D 9/00 - Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
30.
WORKPIECE MACHINING METHOD, POLISHING-MACHINE BRUSH, AND TOOL HOLDER
The present invention addresses the problem of providing a machining method capable of efficiently performing deburring and polishing of a workpiece, and extending the life of a brush to be used in a machine tool that does not have power for directly rotating a tool and that can machine the workpiece by bringing the tool and the workpiece into contact with each other while moving the same relative to each other. The present invention relates to a machining method with which, in a machine tool that does not have power for rotating a tool, a brush-like grinding stone and a workpiece are moved relative to each other while bringing the brush-like grinding stone and the workpiece into contact with each other, thereby rotating the brush-like grinding stone and thus machining the workpiece.
B24B 29/00 - 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
A rotating tool includes a tool body including a polishing tool and a shank, and a flange part provided in the tool body. The polishing tool includes a plurality of linear grinding members and a grinding member holder to hold the linear grinding members. The flange part is an annular member, and attached to the grinding member holder, so as to be movable in the direction of an axial line and rotatable about the axial line. When the inner circumferential surface of a hole formed in a workpiece is processed, the grinding member holder and the annular member are inserted into the hole. When run-out on the front side of the rotating tool occurs, the annular member comes into contact with the peripheral wall surface of the hole, whereby the run-out of the tool body is reduced.
B24B 5/40 - Single-purpose machines or devices for grinding tubes internally
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 23/08 - Portable grinding machines designed for fastening on workpieces or other parts of particular section, e.g. for grinding commutators
a) and the sleeve (6) about the axis (L). While rotation of the nut (36) about the axis (L) is regulated, the gear screw (30) is rotated, whereby the nut (36) is moved and the protruding amount of linear grinding members (3) is adjusted.
B24B 29/00 - 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
A rotary polishing tool (1) comprises: an abrasive material (2); an abrasive material holder (3); a shank (4); and a universal joint (5) that connects the abrasive material holder (3) and the shank (4) to each other. The abrasive material (2) includes a cylindrical trunk (13) in which first aggregate yarn (11) and second aggregate yarn of inorganic long fibers are fixed to each other with a resin. Each aggregate yarn (11, 12) extends in a direction that is inclined at an angle smaller than 45° with respect to an axial line L from a front annular end surface (13a) side toward a rear annular end surface (13b) side. The front annular end surface (13a) is a polishing surface and front end surfaces of the aggregate yarns (11, 12) are exposed thereat.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
34.
Polishing method, brush-like grinding stone, polishing brush, and linear member aggregate
A brush-like grinding stone (3) in a polishing brush (1) includes a brush holder (6) and a linear member aggregate (7) detachably held in the brush holder (6). The linear member aggregate (7) includes a large number of bundles (51) of the linear members (50) obtained by hardening aggregated yarn of inorganic filaments impregnated with a resin, and a brush holder (70) holding ends of the bundles (51). A linear member holder (70) in the linear member aggregate (7) is detachably attached to each of a plurality of holding holes (68) that is open in one side in an axial line direction L. In a case where any of the linear member aggregates has a failure, such as breakage, only the failed linear member aggregate needs to be replaced. Thus, it is not necessary to discard the entire brush-like grinding stone. Consequently, the polishing cost can be reduced.
B24D 13/18 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
B24B 29/00 - 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
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A46B 7/04 - Bristle carriers arranged in the brush body interchangeably
A polishing brush (1) includes a plurality of linear abrasive members (32) each formed by hardening an aggregated yarn of inorganic filaments by a resin binder, and a holder (2) that holds the linear abrasive members (32). The linear abrasive members (32) are held by a base (31). The base (31) is secured to a spindle (25) in the holder (2). In the spindle (25), a flow path (28) for discharging a liquid cutting agent toward a side on which free ends (33) of the linear abrasive members (32) are located is provided.
A polishing brush (1) is provided with: a brush-shaped grindstone (12) in which a plurality of abrasive material bundles (11) comprising a bundled linear abrasive material (27) are held in an annular shape; and an abrasive material displacement-regulating member (13) that regulates the displacement of the abrasive bundles (11) toward the outer peripheral side. The brush-shaped grindstone (12) is provided with an abrasive material holder (15) that holds the base end part (the upper end part) of each of the abrasive bundles (11). The abrasive material displacement-regulating member (13) is provided with an annular section (33) that surrounds the linear abrasive material (27) from the outer peripheral side at a position between the tip of the linear abrasive material (27) and the abrasive material holder (15) in the central axis of rotation (L) direction, said position being separated from the tip of the linear abrasive material (27) and the abrasive material holder (15). Each of the abrasive material bundles (11) is held by the abrasive material holder (15) and the parts of said abrasive material bundles (11) that are close to the abrasive material holder (15) are exposed on the outer peripheral side, thus making it easy for a cutting fluid or air supplied from the outer peripheral side of the polishing brush (1) to reach a part to be polished on a workpiece.
This polishing brush (4) comprises: an abrasive material bundle (9) in which a plurality of pieces of a linear abrasive material (28) are bundled, said linear abrasive material (28) being obtained by impregnating an aggregate fiber of inorganic long fibers with a resin and curing the result; and an abrasive material holder (7) in which a holding hole (20) for holding a base end part of the abrasive material bundle (9) is provided to an outer peripheral side surface (7c) that is an abrasive material-holding surface. The abrasive material bundle (9) is provided with a front side surface (9a) that faces frontward and a rear side surface (9b) that faces rearward in a rotational direction (R1). The abrasive material bundle (9) is held by the abrasive material holder (7) in a state in which the front side surface (9a) and the rear side surface (9b) are inclined in the same direction with respect to a virtual plane (30) that extends in the radial direction so as to include the center point (P) of the cross section (9d) when the abrasive bundle (9) is cut at the outer peripheral side surface (7c) and the central axis of rotation (L) of the abrasive material holder (7). Each of the pieces of the linear abrasive material (28) that constitutes the abrasive material bundle (9) is easily displaced, thereby making it possible to release force when excessive force is applied to each of the pieces of the linear abrasive material (28).
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A polishing brush (1) comprises: abrasive material bundles (22) in which multiple linear abrasive materials (21), obtained by impregnating and solidifying resin in aggregated fibers of inorganic filaments, are bundled; and an abrasive material holder (23) for holding the multiple abrasive material bundles (22). A circular abrasive material-holding groove (28) is formed in the abrasive material holder (23) and an adhesive (29) is filled in the abrasive material-holding groove (28). The respective base end portions (22a) of the multiple abrasive material bundles (22) are inserted in the abrasive material-holding groove (28) mutually separated from each other and are fixed in the abrasive material holder (23) by the adhesive (29). Even when the diameter, etc. of the abrasive material bundle (22) is larger than the width of the groove, the abrasive material bundle (22) can be inserted in the groove by deforming the abrasive material bundle (22) to conform to the groove.
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
39.
CUP-SHAPED BRUSH AND METHOD FOR PRODUCING CUP-SHAPED BRUSH
This cup-shaped brush (1) comprises: a grinding member aggregate (7) made by aligning a plurality of linear grinding members (4) in a row and forming a belt shape, and fixing the linear grinding members with a double-faced tape (10) extending along the alignment direction; and a grinding member holder (3) having an annular outer circumferential surface (6a). The grinding member aggregate (7) is fixed to the grinding member holder (3) by being wound onto the annular outer circumferential surface (6a), and thus, the plurality of linear grinding members (4) are arranged annularly. Accordingly, there is no need to use a channel fitting in order to annularly align the plurality of linear grinding members (4) and fix the same to the grinding member holder (3).
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A46B 3/02 - Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by pitch, resin, cement, or other adhesives
This polishing brush (1) comprises a cup-shaped brush case (4) and a brush-shaped grindstone (5). The brush-shaped grindstone (5) includes a brush holder (7) that holds a filiform material aggregate (3) which is a bundle of a plurality of linear grinding members (2) in which aggregated threads of long inorganic fibers have been hardened by a resin binder. The brush holder (7) includes: a base holder (8) that is fixed to a support shaft (44) of the brush case (4); and a ring-shaped holder (9) that is detachably fixed to the base holder (8) by fixing screws (10). At the time of replacing the linear grinding members (2), the linear grinding members (2) are removed from the base holder (8) and discarded together with the ring-shaped holder (9), and the base holder (8) part is reused.
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 29/00 - 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
41.
TOOL HOLDER, GRINDING TOOL, GRINDING TOOL UNIT, AND METHOD FOR ADJUSTING AMOUNT OF PROTRUSION OF GRINDING MATERIAL
A grinding tool unit (1) is provided with a brush-like grinding stone (4) and a tool holder (2). The tool holder (2) is provided with a shank (2a), a sleeve (6), a gear screw (30), and a nut (36). The nut (36) is engaged with the bolt portion (34) of the gear screw (30). The brush-like grinding stone (4) is connected to the front side of the nut (36) and is held by the tool holder (2). The gear screw (30) can rotate about an axis (L) relative to the shank (2a) and the sleeve (6). Rotating the gear screw (30) while the rotation of the nut (36) about the axis (L) is restricted moves the nut (36) and adjusts the amount of protrusion of a linear grinding material (3).
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 29/00 - 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
42.
ROTATING TOOL, GRINDING TOOL, AND MACHINING METHOD
A rotating tool (1) is provided with a tool body (5) comprising a grinding tool (2) and a shank (3), and a flange part (4) provided to the tool body (5). The grinding tool (2) is provided with a plurality of linear abrasive materials (6), and an abrasive material holder (7) for holding the linear abrasive materials (6). The flange part (4) is an annular member (8), and is attached to the abrasive material holder (7) so as to be able to move in the direction of an axis line (L) and rotate about the axis line (L). When the inner peripheral surface of a hole (H) formed in a workpiece (W) is machined, the abrasive material holder (7) and the annular member (8) are inserted into the hole (H). When the front side of the rotating tool (1) oscillates, the annular member (8) comes into contact with the peripheral wall surface of the hole (H), and the oscillation of the tool body (5) is suppressed.
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
B24B 5/40 - Single-purpose machines or devices for grinding tubes internally
B24B 29/00 - 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
43.
POLISHING METHOD, BRUSH-FORM GRINDSTONE, POLISHING BRUSH, AND FILIFORM MATERIAL AGGREGATE
A brush-form grindstone (3) of a polishing brush (1) is provided with a brush holder (6) and a filiform material aggregate (7) detachably held in the brush holder (6). The filiform material aggregate (7) is provided with bundles (51) of multiple wire rods (50) obtained by impregnating aggregated fibers of inorganic filament with a resin and solidifying the impregnated fibers, and wire rod holders (70) holding the ends of the bundles (51). The wire rod holders (70) of the filiform material aggregate (7) are detachably fastened in each of a plurality of holding holes (68) that open on one surface side in the direction of an axis (L) of the brush holder (6). If a defect such as bending occurs in any of the filiform material aggregates (7), only the required filiform material aggregate (7) needs to be replaced, without requiring the entire brush-like grindstone (3) to be discarded. The cost associated with the polishing step can thus be reduced.
A polishing brush (1) comprises a plurality of linear abrasive materials (32) formed by hardening an aggregate yarn of inorganic filaments by a resin binder, and a holder (2) for holding the plurality of linear abrasive materials (32). The linear abrasive materials (32) are held by a base (31), and the base (31) is secured to a spindle (25) inside the holder (2). Inside the spindle (25), a flow path (28) through which a liquid cutting agent is discharged toward the side on which the free ends (33) of the linear abrasive materials (32) are located is formed.
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
A46B 13/02 - Brushes with driven brush bodies power-driven
B24B 29/00 - 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
45.
LINEAR GRINDING MATERIAL, BRUSH-SHAPED GRINDSTONE AND METHOD FOR MANUFACTURING LINEAR GRINDING MATERIAL
The brush-shaped grindstone (1) is provided with linear grinding material (11) in which aggregate fibers of long inorganic fibers have been hardened with a resin binder. For the linear grinding material (11), linear grinding material (11A) with a square cross-sectional shape, linear grinding material (11B) with a rectangular cross-sectional shape, or linear grinding material (11C) with an elliptical cross-sectional shape is used. The linear grinding material (11A) is difficult to bend in the diagonal direction of the cross-section. The linear grinding material (11B) and the linear grinding material (11C) are difficult to bend in the long direction of the cross-section. Consequently, the linear grinding materials (11A - 11C) have edge effects and have high grinding force.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
A46D 1/00 - Bristles; Selection of materials for bristles
For the purpose of producing an alumina composite in which the integrity between alumina and an inorganic material is further improved, a dispersion liquid preparation step, a solidification step and a burning step are performed, wherein the dispersion liquid preparation step comprises preparing a dispersion liquid in which an inorganic material such as a carbon material is homogeneously dispersed in an alumina raw material solution having an organic additive dissolved therein, the solidification step comprises drying the dispersion liquid to produce a solid raw material, and burning step comprises burning the solid raw material in a non-acidic atmosphere while contacting hydrogen chloride with the solid raw material. In this manner, an alumina composite can be produced, in which at least a portion of an inorganic material such as a carbon material is embedded in the inside of each of α-alumina single crystal particles the constitute alumina particles.
H01B 1/18 - Conductive material dispersed in non-conductive inorganic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
C04B 35/00 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
H01B 1/04 - Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon, or silicon
C04B 35/80 - Fibres, filaments, whiskers, platelets, or the like
C08K 7/00 - Use of ingredients characterised by shape
C30B 7/02 - Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by evaporation of the solvent
C30B 29/60 - Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
For the purpose of producing an alumina composite in which the integrity between alumina and an inorganic material is further improved, a dispersion liquid preparation step (ST1), a solidification step (ST2) and a burning step (ST3) are performed, wherein the dispersion liquid preparation step (ST1) comprises preparing a dispersion liquid in which an inorganic material such as a carbon material is homogeneously dispersed in an alumina raw material solution having an organic additive dissolved therein, the solidification step (ST2) comprises drying the dispersion liquid to produce a solid raw material, and burning step (ST3) comprises burning the solid raw material in a non-acidic atmosphere while contacting hydrogen chloride with the solid raw material. In this manner, an alumina composite can be produced, in which at least a portion of an inorganic material such as a carbon material is embedded in the inside of each of α-alumina single crystal particles the constitute alumina particles.
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.
B24D 13/10 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
B24D 13/14 - Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
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