Patents by Inventor Motohiko Ito
Motohiko Ito has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11669074Abstract: To enable turning-on/off of constant surface speed control during machining. A numerical control device has a constant surface speed control function for controlling a spindle rotation rate to make a surface speed constant, and includes: a surface speed calculating unit for calculating a surface speed based on a spindle rotation speed having been designated and a distance from a rotation center; a cutting speed setting unit for setting a minimum cutting speed and a maximum cutting speed; a comparison unit for comparing the surface speed with the minimum cutting speed and the maximum cutting speed; and an operation control unit for controlling whether to activate the constant surface speed control function based on a result of the comparison made by the comparison unit.Type: GrantFiled: September 28, 2020Date of Patent: June 6, 2023Assignee: FANUC CORPORATIONInventor: Motohiko Ito
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Publication number: 20210109501Abstract: To enable turning-on/off of constant surface speed control during machining. A numerical control device has a constant surface speed control function for controlling a spindle rotation rate to make a surface speed constant, and includes: a surface speed calculating unit for calculating a surface speed based on a spindle rotation speed having been designated and a distance from a rotation center; a cutting speed setting unit for setting a minimum cutting speed and a maximum cutting speed; a comparison unit for comparing the surface speed with the minimum cutting speed and the maximum cutting speed; and an operation control unit for controlling whether to activate the constant surface speed control function based on a result of the comparison made by the comparison unit.Type: ApplicationFiled: September 28, 2020Publication date: April 15, 2021Inventor: Motohiko ITO
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Patent number: 10444728Abstract: A numerical controller controls a machine tool that has a plurality of axes based on a program command. The numerical controller analyzes the program command. When the program command contains a positioning command, the numerical controller generates a correction path bent in a direction going away from the workpiece with respect to a straight-line path toward a commanded position from a current position of the tool that machines the workpiece, and controls respective axes of the machine tool based on the generated correction path.Type: GrantFiled: October 13, 2016Date of Patent: October 15, 2019Assignee: Fanuc CorporationInventors: Motohiko Ito, Hiroshi Minami
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Patent number: 10268178Abstract: Command data indicating a command path of a tool is generated on the basis of tool data created on the basis of an inclination and a shape of the tool, and interpolation data for each interpolation period is generated and outputted. When a command block is a block commanding skiving processing, correction data for correcting the command path is generated on the basis of the tool data stored in the tool data storage unit, and the correction data corresponding to interpolation data outputted by an interpolation unit is outputted.Type: GrantFiled: February 11, 2016Date of Patent: April 23, 2019Assignee: FANUC CorporationInventors: Shuji Ogawa, Motohiko Ito, Masaru Kuroiwa
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Patent number: 10261500Abstract: A numerical controller calculates a tool path and a tool feed rate based on a cutting point path and a cutting point feed rate instructed by a skiving instruction when a block read from a machining program is the skiving instruction and controls a machining tool based on the calculated tool path and the tool feed rate.Type: GrantFiled: January 12, 2016Date of Patent: April 16, 2019Assignee: FANUC CorporationInventors: Shuji Ogawa, Motohiko Ito, Yukihiro Hiraishi
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Patent number: 9964940Abstract: A numerical controller performs cross-rail axis control that distributes moving amount to a first and second axes based on a command to a virtual axis. If a block of a program that is read out contains a fast feed command to the virtual axis for moving a tool to a cutting feed start point, the numerical controller distributes a moving amount commanded by the fast feed command to the first axis and the second axis. Further, the moving amount commanded by the fast feed command is distributed to the first axis and the second axis so that movement of the virtual axis commanded by a cutting feed command that follows the fast feed command in the program can be achieved by movement of only the first axis.Type: GrantFiled: August 4, 2016Date of Patent: May 8, 2018Assignee: FANUC CORPORATIONInventors: Yasushi Takeuchi, Makoto Suzuki, Motohiko Ito
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Patent number: 9958853Abstract: A numerical controller stores tool data (including information on an inclination and length of a linear blade of a tool), reads an instruction block from a program, analyzes the instruction block, and generates instruction data indicating a movement amount of the tool on each axis instructed by the instruction block. Further, when performing taper machining, the numerical controller calculates a compensating amount for compensating an instructed path, based on the stored tool data, such that an actually-machined taper angle matches a taper angle instructed by the instruction block, compensates the generated instruction data based on the calculated compensating amount, and outputs the compensated instruction data.Type: GrantFiled: February 22, 2017Date of Patent: May 1, 2018Assignee: FANUC CORPORATIONInventors: Motohiko Ito, Osamu Nakajima
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Publication number: 20170242422Abstract: A numerical controller stores tool data (including information on an inclination and length of a linear blade of a tool), reads an instruction block from a program, analyzes the instruction block, and generates instruction data indicating a movement amount of the tool on each axis instructed by the instruction block. Further, when performing taper machining, the numerical controller calculates a compensating amount for compensating an instructed path, based on the stored tool data, such that an actually-machined taper angle matches a taper angle instructed by the instruction block, compensates the generated instruction data based on the calculated compensating amount, and outputs the compensated instruction data.Type: ApplicationFiled: February 22, 2017Publication date: August 24, 2017Applicant: FANUC CORPORATIONInventors: Motohiko Ito, Osamu Nakajima
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Publication number: 20170108847Abstract: A numerical controller controls a machine tool that has a plurality of axes based on a program command. The numerical controller analyzes the program command. When the program command contains a positioning command, the numerical controller generates a correction path bent in a direction going away from the workpiece with respect to a straight-line path toward a commanded position from a current position of the tool that machines the workpiece, and controls respective axes of the machine tool based on the generated correction path.Type: ApplicationFiled: October 13, 2016Publication date: April 20, 2017Applicant: FANUC CORPORATIONInventors: Motohiko Ito, Hiroshi Minami
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Publication number: 20170045872Abstract: A numerical controller performs cross-rail axis control that distributes moving amount to a first and second axes based on a command to a virtual axis. If a block of a program that is read out contains a fast feed command to the virtual axis for moving a tool to a cutting feed start point, the numerical controller distributes a moving amount commanded by the fast feed command to the first axis and the second axis. Further, the moving amount commanded by the fast feed command is distributed to the first axis and the second axis so that movement of the virtual axis commanded by a cutting feed command that follows the fast feed command in the program can be achieved by movement of only the first axis.Type: ApplicationFiled: August 4, 2016Publication date: February 16, 2017Applicant: FANUC CORPORATIONInventors: Yasushi Takeuchi, Makoto Suzuki, Motohiko Ito
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Publication number: 20160246288Abstract: Command data indicating a command path of a tool is generated on the basis of tool data created on the basis of an inclination and a shape of the tool, and interpolation data for each interpolation period is generated and outputted. When a command block is a block commanding skiving processing, correction data for correcting the command path is generated on the basis of the tool data stored in the tool data storage unit, and the correction data corresponding to interpolation data outputted by an interpolation unit is outputted.Type: ApplicationFiled: February 11, 2016Publication date: August 25, 2016Inventors: Shuji OGAWA, Motohiko ITO, Masaru KUROIWA
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Publication number: 20160209824Abstract: A numerical controller calculates a tool path and a tool feed rate based on a cutting point path and a cutting point feed rate instructed by a skiving instruction when a block read from a machining program is the skiving instruction and controls a machining tool based on the calculated tool path and the tool feed rate.Type: ApplicationFiled: January 12, 2016Publication date: July 21, 2016Inventors: Shuji OGAWA, Motohiko ITO, Yukihiro HIRAISHI
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Publication number: 20050240301Abstract: A numerical controller capable of easily selecting and designating a spindle to be controlled according to a command for the spindle. A spindle ID for designating a spindle to be controlled is given to be associated with a command for the spindle in a machining program. When an analysis/operation section reads the spindle ID, it transmits the commanded spindle ID to spindle selection processing. Then, the commanded spindle ID is collated with spindle ID parameter setting information to determine the spindle to be controlled and spindle control processing is connected to its corresponding one of the spindle control interfaces. Based on the command for the spindle, the spindle control processing is performed to control the selected spindle through the connected spindle interface. Feedback signals may be inputted and processed by spindle feedback signal processing in the same manner.Type: ApplicationFiled: April 21, 2005Publication date: October 27, 2005Applicant: FANUC LTDInventors: Takahiko Endo, Eiji Genma, Takashi Kurokawa, Motohiko Ito
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Patent number: 6257084Abstract: A transmission 1 includes: a casing 2 and rotatable shafts 50, 60, 70. A drive gear of a reversing gear train 24 and a drive gear of a first speed gear train 25 are fixed on the input shaft 50. The gear change mechanism for 1st speed operation is constituted by he fixed 1st gear 25, a rotatable 1st gear 22, and a synchromesh device 20 supported on the intermediate shaft 60. The gear change mechanism for reversing operation is constituted by the fixed reversing gear 24, a rotatable reversing gear 21, and the synchromesh device 20. An idle gear 66 is rotatably supported on an idle shaft 65 that is supported by a wall of housing 511 adjacent to the reversing gear.Type: GrantFiled: November 6, 1998Date of Patent: July 10, 2001Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Atsuo Yoshina, Motohiko Ito
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Patent number: 5095203Abstract: An article detection device includes: a light emission unit for emitting a detection light for irradiation onto an article, and a light reception unit for receiving a light reflected from the article. The article detection device also includes; an analog-to-digital converter for converting the reflected light to a digital signal, a first register for storing the digital signal after being sampled using a first sampling signal having a first period, and a second register for storing the digital signal after being sampled using a second sampling signal having a second period shorter than the first period.Type: GrantFiled: October 16, 1990Date of Patent: March 10, 1992Assignee: Fujitsu LimitedInventors: Shinichi Sato, Takeshi Ishii, Tamotsu Takahashi, Yoshihiro Oyama, Tatsuo Sasaki, Mitsuo Watanabe, Ichiro Shinoda, Hiroaki Katoh, Nobuyuki Kitamura, Motohiko Ito, Tomoyuki Kashiwazaki, Hiroaki Kawai
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Patent number: 4625887Abstract: A water-sealed type pot in which water can be retained between a flange portion at the upper portion of the pot body and its lid to obtain a sealing property. The lid includes a steam escape hole around which a valve seat is formed. Since a valve member is slidably provided on the valve seat, it can be selectively changed over between a position for opening the hole and a position for closing it. Although the valve member is pressed against the valve seat by a spring, it can rotate around the axis defined by the knob on the lid. In order to reduce friction during rotation, at least one of the slide surfaces of the valve member and of the valve seat is formed of polytetrafluoroethylene.Type: GrantFiled: November 20, 1985Date of Patent: December 2, 1986Assignee: Taiyo Altight Kogyo Co., Ltd.Inventor: Motohiko Ito
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Patent number: D371933Type: GrantFiled: December 19, 1994Date of Patent: July 23, 1996Assignee: Taiyo Altight Kogyo Co., Ltd.Inventor: Motohiko Ito
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Patent number: D374373Type: GrantFiled: September 27, 1995Date of Patent: October 8, 1996Assignee: Taiyo Altight Kogyo Co., Ltd.Inventor: Motohiko Ito