Patents Assigned to Toyoda Van Moppes Ltd.
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Patent number: 9878426Abstract: A method for manufacturing a grinding wheel which is formed by fitting a cylindrical grindstone chip including abrasive grains to a base metal formed to be of a columnar shape, comprises an adhesive agent applying step, a linear guide member arranging step for arranging and attaching a plurality of linear guide members on at least one of the outer peripheral surface of the base metal and the inner peripheral surface of the cylindrical grindstone chip, in parallel with a rotation axis of the base metal and with an equal distance separated in a circumferential direction from one another and a base metal and grindstone chip fitting step for fitting the base metal and the cylindrical grindstone chip to each other by relatively moving the base metal and the cylindrical grindstone chip, interposing therebetween the plurality of linear guide members arranged and attached with the equal distance separated from one another.Type: GrantFiled: October 23, 2015Date of Patent: January 30, 2018Assignee: TOYODA VAN MOPPES LTD.Inventors: Takuma Kono, Takashi Kojima, Motohiro Mizuno, Takumi Masuda
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Patent number: 9539702Abstract: The abrasive grinding wheel includes an annular abrasive grain layer formed by a diamond abrasive grain or CBN abrasive grain and fixed to an outer peripheral surface of a cylindrical grinding wheel core by an adhesive agent. The abrasive grinding wheel further includes a waterproof agent applied on both side end surfaces and an inner peripheral surface of the cylindrical grinding wheel core in order to prevent any water ingress into the inside of the core.Type: GrantFiled: January 23, 2015Date of Patent: January 10, 2017Assignee: TOYODA VAN MOPPES LTD.Inventors: Yasuji Kunihiro, Masayuki Shimizu, Takuma Kono, Tsutomu Kato
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Publication number: 20160184977Abstract: A method for manufacturing a grinding wheel which is formed by fitting a cylindrical grindstone chip including abrasive grains to a base metal formed to be of a columnar shape, comprises an adhesive agent applying step, a linear guide member arranging step for arranging and attaching a plurality of linear guide members on at least one of the outer peripheral surface of the base metal and the inner peripheral surface of the cylindrical grindstone chip, in parallel with a rotation axis of the base metal and with an equal distance separated in a circumferential direction from one another and a base metal and grindstone chip fitting step for fitting the base metal and the cylindrical grindstone chip to each other by relatively moving the base metal and the cylindrical grindstone chip, interposing therebetween the plurality of linear guide members arranged and attached with the equal distance separated from one another.Type: ApplicationFiled: October 23, 2015Publication date: June 30, 2016Applicant: TOYODA VAN MOPPES LTD.Inventors: Takuma KONO, Takashi KOJIMA, Motohiro MIZUNO, Takumi MASUDA
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Publication number: 20150258661Abstract: The abrasive grinding wheel includes an annular abrasive grain layer formed by a diamond abrasive grain or CBN abrasive grain and fixed to an outer peripheral surface of a cylindrical grinding wheel core by an adhesive agent. The abrasive grinding wheel further includes a waterproof agent applied on both side end surfaces and an inner peripheral surface of the cylindrical grinding wheel core in order to prevent any water ingress into the inside of the core.Type: ApplicationFiled: January 23, 2015Publication date: September 17, 2015Applicant: TOYODA VAN MOPPES LTD.Inventors: Yasuji KUNIHIRO, Masayuki Shimizu, Takuma Kono, Tsutomu Kato
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Patent number: 8771043Abstract: A rotary dresser is provided with a roll having an outer circumferential surface which includes an arc portion or inclined portion differing in diameter in dependence on the axial position thereof, and a plurality of diamond abrasive grains embedded on the outer circumferential surface of the roll. The number of the diamond abrasive grains in the circumferential direction is fixed even at any axial position on the outer circumferential surface of the roll.Type: GrantFiled: June 29, 2011Date of Patent: July 8, 2014Assignees: Toyoda Van Moppes Ltd., JTEKT CorporationInventors: Sadao Sakakibara, Shinji Soma
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Publication number: 20140115973Abstract: An electroplated wheel comprises a metal base formed to a disc shape and rotationally driven about a rotational axis and a superabrasive grain layer formed to have numerous superabrasive grains fixed by plating on a belt section that extends in a predetermined width on an outer peripheral portion of the metal base. In the electroplated wheel, a plurality of masking portions having no superabrasive grains electrodeposited thereat are formed of gel adhesive fixed as dots to be larger than the superabrasive grains by a dispenser at intersection points of a plurality of concentric array circles imaginarily drawn concentrically of the rotational axis to divide the belt section at equal intervals and a plurality of width-direction array lines imaginarily drawn from one end toward the other end of the belt section to divide the belt section at equal intervals in a circumferential direction.Type: ApplicationFiled: October 29, 2013Publication date: May 1, 2014Applicant: TOYODA VAN MOPPES LTD.Inventors: Hajime FUKAMI, Toshihiro Sato, Sadao Sakakibara, Takayuki Kobayashi
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Patent number: 8444726Abstract: A grinding wheel is manufactured such that (a) any one of particles for an abrasive grain layer and particles for a substrate layer are put into the press-mold die, and other particles are put onto the particles in the press-mold die, and then the substrate layer and the abrasive grain layer are integrally press-molded to form a non-baked grinding chip with an arcuate shape; (b) depressions are formed on the abrasive grain layer of the non-baked grinding chip; (c) the grinding chip on which the depressions are formed is baked; and (d) the plurality of baked-grinding chips are adhered to a core of the grinding wheel.Type: GrantFiled: October 19, 2007Date of Patent: May 21, 2013Assignees: JTEKT Corporation, Toyoda Van Moppes Ltd.Inventors: Shinji Soma, Koji Morita, Tomohiro Inagaki, Takayuki Moroto, Kazuhiko Sugita, Tomoyasu Imai, Yasuji Kunihiro
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Patent number: 8182318Abstract: In a manufacturing method for a grinding wheel in which a plurality of wheel chips each composed of an abrasive grain layer containing superabrasive grains and a foundation layer are adhered to a core attached to a wheel spindle carried by a wheel head of a grinding machine to be drivingly rotatable about a rotational axis and in which a grinding surface formed on the abrasive grain layers grinds a workpiece, drivingly rotatably supported by a workpiece support device of the grinding machine, in contact at a grinding point, the method forms green wheel chips each having opposite ends in a wheel circumferential direction inclined relative to the wheel circumferential direction, bakes the green wheel chips to form baked wheel chips, and adheres the plurality of baked wheel chips to the core so that an oblique groove is formed between adjoining abrasive grain layers.Type: GrantFiled: October 24, 2007Date of Patent: May 22, 2012Assignees: Jtekt Corporation, Toyoda Van Moppes Ltd.Inventors: Shinji Soma, Masahiro Ido, Hitoshi Akahane, Tomohiro Inagaki, Yasuji Kunihiro, Tomoyasu Imai
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Publication number: 20120108153Abstract: A rotary dresser is provided with a roll having an outer circumferential surface which includes an arc portion or inclined portion differing in diameter in dependence on the axial position thereof, and a plurality of diamond abrasive grains embedded on the outer circumferential surface of the roll. The number of the diamond abrasive grains in the circumferential direction is fixed even at any axial position on the outer circumferential surface of the roll.Type: ApplicationFiled: June 29, 2011Publication date: May 3, 2012Applicants: JTEKT Corporation, TOYODA VAN MOPPES LTD.Inventors: Sadao SAKAKIBARA, Shinji Soma
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Patent number: 8033278Abstract: A plurality of segmented chips are reinforced by applying an adhesive to the circumferentially opposite end portions thereof, and the adjoining segmented chips adjoining in the circumferential direction are adhered to the circumferential surface of a disc-like core with the adhesives at the circumferentially opposite end portions being not jointed with each other. Thus, the segmented chips can be prevented from being loaded with an unnatural force even when the disc-like core with the segmented chips adhered thereto expands and contracts radially due to thermal expansion and thermal contract. Thereby, expansion and contraction of the disc-like core do not impose a compression stress or the like on adhesives situated between adjoining segmented chips.Type: GrantFiled: November 13, 2006Date of Patent: October 11, 2011Assignees: Toyoda Van Moppes Ltd., JTEKT CorporationInventors: Masato Kitajima, Kunihiko Unno, Hiroshi Takehara, Takuma Kono, Shinji Soma
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Patent number: 8016579Abstract: A superabrasive grain setting apparatus for arranging superabrasive grains on a surface of a manufacturing mold used in manufacturing a grinding tool includes a grip and raising mechanism for gripping the mold in a horizontal state and for turning the mold to a vertical state. A six-axis control robot is composed of a base arm mechanism with three controlled axes and a wrist unit with three controlled axes attached to the base arm mechanism. A superabrasive grain supply device has a grain storage for storing the superabrasive grains and a grain separation mechanism for separating the superabrasive grains in the grain storage one by one to a suction position. A suction nozzle is detachably mounted on an endmost arm of the robot and provided with a bent nose portion for drawing a grain of superabrasive to a nozzle end thereof at the suction position.Type: GrantFiled: November 12, 2008Date of Patent: September 13, 2011Assignee: Toyoda Van Moppes Ltd.Inventors: Sadao Sakakibara, Kodo Kobayashi, Hiroyasu Shimizu, Kazuhiko Sugita
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Patent number: 7927389Abstract: In a superabrasive grain setting method, a two-dimensionally developed coordinate preparation step is taken, wherein a non-cylindrical area of a mounting surface where a tangential line to the mounting surface in a plane including the axis of the manufacturing mold crosses with the axis of a manufacturing mold is developed into a circular-arc belt-like surface, and a plurality of mounting points are set on the circular-arc belt-like surface in a grid pattern in dependence on mounting positions for superabrasive grains. Then, a rectification step is taken, wherein the grid pattern of the mounting points is rectified in predetermined angular ranges so that the mounting points do not make consecutive point lines in the circumferential direction of the circular-arc belt-like surface. A mounting step is thereafter taken of mounting the superabrasive grains on the mounting surface of the manufacturing mold based on the grid pattern rectified at the rectification step.Type: GrantFiled: November 17, 2008Date of Patent: April 19, 2011Assignee: Toyoda Van Moppes Ltd.Inventors: Sadao Sakakibara, Kodo Kobayashi, Hiroyasu Shimizu, Kazuhiko Sugita
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Publication number: 20100317267Abstract: In a manufacturing method for a grinding wheel in which a plurality of wheel chips each composed of an abrasive grain layer containing superabrasive grains and a foundation layer are adhered to a core attached to a wheel spindle carried by a wheel head of a grinding machine to be drivingly rotatable about a rotational axis and in which a grinding surface formed on the abrasive grain layers grinds a workpiece, drivingly rotatably supported by a workpiece support device of the grinding machine, in contact at a grinding point, the method forms green wheel chips each having opposite ends in a wheel circumferential direction inclined relative to the wheel circumferential direction, bakes the green wheel chips to form baked wheel chips, and adheres the plurality of baked wheel chips to the core so that an oblique groove is formed between adjoining abrasive grain layers.Type: ApplicationFiled: October 24, 2007Publication date: December 16, 2010Applicants: JTEKT CORPORATION, TOYODA VAN MOPPES LTD.Inventors: Shinji Soma, Masahiro Ido, Hitoshi Akahane, Tomohiro Inagaki, Yasuji Kunihiro, Tomoyasu Imai
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Patent number: 7824246Abstract: In a wheel spindle device wherein a plurality of grinding wheels are attached in a juxtaposed relation to a wheel spindle rotatably carried on a wheel head of a grinding machine, a reference position for specifying a position in the circumferential direction of the grinding wheel is provided on a core member of each of the grinding wheels, and a plurality of inclined grooves at predetermined angular intervals are formed on a grinding surface of each grinding wheel to be inclined relative to the circumferential direction of each grinding wheel. In order that the fluctuations in the dynamic pressure and the grinding resistance between respective grinding wheels and workpiece portions ground therewith do not grow as a combined or synergy effect, the inclined grooves on each grinding wheel are shifted in angular phase from those on another grinding wheel, so that grinding efficiency and accuracy can be enhanced.Type: GrantFiled: June 2, 2008Date of Patent: November 2, 2010Assignees: Toyoda Van Moppes Ltd., JTEKT CorporationInventors: Tomohiro Inagaki, Tomoyasu Imai, Takayuki Moroto, Shinji Soma
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Publication number: 20100261420Abstract: A plurality of segmented chips are reinforced by applying an adhesive to the circumferentially opposite end portions thereof, and the adjoining segmented chips adjoining in the circumferential direction are adhered to the circumferential surface of a disc-like core with the adhesives at the circumferentially opposite end portions being not jointed with each other. Thus, the segmented chips can be prevented from being loaded with an unnatural force even when the disc-like core with the segmented chips adhered thereto expands and contracts radially due to thermal expansion and thermal contract. Thereby, expansion and contraction of the disc-like core do not impose a compression stress or the like on adhesives situated between adjoining segmented chips.Type: ApplicationFiled: November 13, 2006Publication date: October 14, 2010Applicants: TOYODA VAN MOPPES LTD., JTEKT CORPORATIONInventors: Masato Kitajima, Kunihiko Unno, Hiroshi Takehara, Takuma Kono, Shinji Soma
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Patent number: 7695353Abstract: In a grinding wheel in which abrasive tips for rough grinding and abrasive tips for finish grinding are alternately bonded to a periphery of a disk type base rotating about a rotation axis, each abrasive tip includes the abrasive layer formed by bonding abrasive grains and a lower layer overlaid and integrally for led with the abrasive layer. The abrasive tip is attached to the periphery of the base at the lower layer. A Young's modulus of the lower layer of the abrasive tip for finish grinding relative to a load acting on the grinding surface of the abrasive tip in an inward direction of the grinding wheel is less than that of the abrasive tip for rough grinding. Thereby, the surface of a workpiece can be both rough-ground and finish-ground with superhigh-precision surface roughness with using one grinding wheel.Type: GrantFiled: November 14, 2005Date of Patent: April 13, 2010Assignees: Toyoda Van Moppes Ltd., JTEKT CorporationInventors: Takayuki Moroto, Kunihiko Unno, Masato Kitajima, Tomoyasu Imai, Yasuhisa Sekiya, Tomohiro Inagaki, Noboru Hiraiwa, Hiroshi Takehara, Toshiaki Sakurai, Shinji Soma
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Publication number: 20100071271Abstract: A grinding wheel is manufactured such that (a) any one of particles for an abrasive grain layer and particles for a substrate layer are put into the press-mold die, and other particles are put onto the particles in the press-mold die, and then the substrate layer and the abrasive grain layer are integrally press-molded to form a non-baked grinding chip with an arcuate shape; (b) depressions are formed on the abrasive grain layer of the non-baked grinding chip; (c) the grinding chip on which the depressions are formed is baked; and (d) the plurality of baked-grinding chips are adhered to a core of the grinding wheel.Type: ApplicationFiled: October 19, 2007Publication date: March 25, 2010Applicants: Jtekt Corporation, Toyoda Van Moppes LtdInventors: Shinji Soma, Koji Morita, Tomohiro Inagaki, Takayuki Moroto, Kazuhiko Sugita, Tomoyasu Imai, Yasuji Kunihiro
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Publication number: 20090139148Abstract: In a superabrasive grain setting method, a two-dimensionally developed coordinate preparation step is taken, wherein a non-cylindrical area of a mounting surface where a tangential line to the mounting surface in a plane including the axis of the manufacturing mold crosses with the axis of a manufacturing mold is developed into a circular-arc belt-like surface, and a plurality of mounting points are set on the circular-arc belt-like surface in a grid pattern in dependence on mounting positions for superabrasive grains. Then, a rectification step is taken, wherein the grid pattern of the mounting points is rectified in predetermined angular ranges so that the mounting points do not make consecutive point lines in the circumferential direction of the circular-arc belt-like surface. A mounting step is thereafter taken of mounting the superabrasive grains on the mounting surface of the manufacturing mold based on the grid pattern rectified at the rectification step.Type: ApplicationFiled: November 17, 2008Publication date: June 4, 2009Applicant: TOYODA VAN MOPPES LTD.Inventors: Sadao SAKAKIBARA, Kodo Kobayashi, Hiroyasu Shimizu, Kazuhiko Sugita
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Publication number: 20090142435Abstract: A superabrasive grain setting apparatus is provided for arranging superabrasive grains on a surface of a manufacturing mold used in manufacturing a grinding tool. The apparatus comprises a grip and raising mechanism for gripping the mold in a horizontal state and for turning the mold to a vertical state; a six-axis control robot composed of a base arm mechanism with three controlled axes and a wrist unit with three controlled axes attached to the base arm mechanism; a superabrasive grain supply device having a grain storage for storing the superabrasive grains and a grain separation mechanism for separating the superabrasive grains in the grain storage one by one to a suction position; and a suction nozzle detachably mounted on an endmost arm of the robot and provided with a bent nose portion for drawing a grain of superabrasive to a nozzle end thereof at the suction position.Type: ApplicationFiled: November 12, 2008Publication date: June 4, 2009Applicant: TOYODA VAN MOPPES LTD.Inventors: Sadao SAKAKIBARA, Kodo KOBAYASHI, Hiroyasu SHIMIZU, Kazuhiko SUGITA
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Publication number: 20090088056Abstract: In a grinding wheel comprising a disc-like core member and a ring-shape grinding wheel layer wherein superabrasive grains selected from cubic boron nitride particles and diamond particles are contained together with aggregates in a bonding material, the aggregates are made of porous ceramics particles and have an average particle size which is in a range of 70% to 150% relative to the average particle size of the superabrasive grains, and bridges made of the bonding material are formed between the aggregates adjoining to one another or between the aggregates and the superabrasive grains adjoining to the aggregates.Type: ApplicationFiled: July 14, 2008Publication date: April 2, 2009Applicants: TOYODA VAN MOPPES LTD., JTEKT CorporationInventors: Hiroshi TAKEHARA, Tomohiro Inagaki, Takayuki Moroto, Hiroshi Imaike, Shinji Soma, Koji Morita