Patents by Inventor Norikazu Suzuki
Norikazu Suzuki 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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Publication number: 20240097152Abstract: In an electrochemical device of an embodiment, a cell stack has a spacer disposed to be arranged next to an insulating sealing member in a direction orthogonal to a stack direction. A plurality of the spacers are arranged in the stack direction between a pair of end plates, and the spacer is interposed between a pair of separators adjacently arranged in the stack direction. The spacer is formed of a material whose thickness reduction ratio when an operation of the electrochemical device is executed is smaller than that of the insulating sealing member. Before the execution of the operation of the electrochemical device, the thickness of the spacer is thinner than the thickness of the insulating sealing member. Further, the thickness of the spacer keeps a state of being equal to or less than the thickness of the insulating sealing member when the operation of the electrochemical device is executed.Type: ApplicationFiled: June 9, 2023Publication date: March 21, 2024Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Riko INUZUKA, Norikazu OSADA, Kentaro MATSUNAGA, Masahiro ASAYAMA, Shohei KOBAYASHI, Yusuke SUZUKI, Tsuneji KAMEDA
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Patent number: 11733673Abstract: A numerical control system according to the present invention controls machine drive systems included in a machine tool that performs machining using a tool, according to a numerical control program, and includes a coordinate transformation unit that acquires a disturbance force or a disturbance torque applied to each machine drive system, and coordinate-transforms the disturbance force or the disturbance torque into a tool reference coordinate system for output, and an identification unit that calculates cutting process parameters that determine characteristics of a cutting process model and dynamic characteristic parameters that determine characteristics of a dynamics model of the machine tool, using the disturbance force or the disturbance torque output from the coordinate transformation unit, states of the machine drive systems, predetermined equation models, and cutting conditions.Type: GrantFiled: December 30, 2022Date of Patent: August 22, 2023Assignees: MITSUBISHI ELECTRIC CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kazuki Takahei, Ryosuke Ikeda, Norikazu Suzuki, Shoya Ohno
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Publication number: 20230137542Abstract: A numerical control system according to the present invention controls machine drive systems included in a machine tool that performs machining using a tool, according to a numerical control program, and includes a coordinate transformation unit that acquires a disturbance force or a disturbance torque applied to each machine drive system, and coordinate-transforms the disturbance force or the disturbance torque into a tool reference coordinate system for output, and an identification unit that calculates cutting process parameters that determine characteristics of a cutting process model and dynamic characteristic parameters that determine characteristics of a dynamics model of the machine tool, using the disturbance force or the disturbance torque output from the coordinate transformation unit, states of the machine drive systems, predetermined equation models, and cutting conditions.Type: ApplicationFiled: December 30, 2022Publication date: May 4, 2023Applicants: Mitsubishi Electric Corporation, National University Corporation Nagoya UniversityInventors: Kazuki TAKAHEI, Ryosuke IKEDA, Norikazu SUZUKI, Shoya OHNO
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Patent number: 11630437Abstract: A numerical control system according to the present invention controls machine drive systems included in a machine tool that performs machining using a tool, according to a numerical control program, and includes a coordinate transformation unit that acquires a disturbance force or a disturbance torque applied to each machine drive system, and coordinate-transforms the disturbance force or the disturbance torque into a tool reference coordinate system for output, and an identification unit that calculates cutting process parameters that determine characteristics of a cutting process model and dynamic characteristic parameters that determine characteristics of a dynamics model of the machine tool, using the disturbance force or the disturbance torque output from the coordinate transformation unit, states of the machine drive systems, predetermined equation models, and cutting conditions.Type: GrantFiled: August 30, 2017Date of Patent: April 18, 2023Assignees: MITSUBISHI ELECTRIC CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kazuki Takahei, Ryosuke Ikeda, Norikazu Suzuki, Shoya Ohno
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Publication number: 20230043639Abstract: The present invention relates to a cyber-physical system for optimizing a simulation model for chemical mechanical polishing based on actual measurement data of chemical mechanical polishing. The chemical mechanical polishing system includes a polishing apparatus (1) for polishing the workpiece (W) and an arithmetic system (47). The arithmetic system (47) includes a simulation model including at least a physical model configured to output an estimated polishing physical quantity including an estimated polishing rate of the workpiece (W). The arithmetic system (47) is configured to: input polishing conditions for the workpiece (W) into the simulation model; output the estimated polishing physical quantity of the workpiece (W) from the simulation model; and determine model parameters of the simulation model that bring the estimated polishing physical quantity closer to a measured polishing physical quantity of the workpiece (W).Type: ApplicationFiled: March 10, 2021Publication date: February 9, 2023Inventors: Norikazu SUZUKI, Hozumi YASUDA, Yoshihiro MOCHIZUKI, Yohei HASHIMOTO
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Publication number: 20220283564Abstract: A machining state diagnosis apparatus (10) includes a machining state information estimation device (1), a learning information storage (11) storing information on relationship between estimated machining state information and actual machining state information, and a machining state diagnosis unit (12) diagnosing a machining state in actual machining using control information, based on machining state information obtained during the actual machining, machining state information estimated based on corresponding control information by the machining state information estimation device (1), and the relationship information stored in the learning information storage 11.Type: ApplicationFiled: August 7, 2020Publication date: September 8, 2022Applicants: DMG MORI CO., LTD., Saitama University, Tokai National Higher Education and Research System, Keio UniversityInventors: Naruhiro IRINO, Yasuhiro IMABEPPU, Junichi KANEKO, Norikazu SUZUKI, Yasuhiro KAKINUMA
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Publication number: 20200333764Abstract: A numerical control system according to the present invention controls machine drive systems included in a machine tool that performs machining using a tool, according to a numerical control program, and includes a coordinate transformation unit that acquires a disturbance force or a disturbance torque applied to each machine drive system, and coordinate-transforms the disturbance force or the disturbance torque into a tool reference coordinate system for output, and an identification unit that calculates cutting process parameters that determine characteristics of a cutting process model and dynamic characteristic parameters that determine characteristics of a dynamics model of the machine tool, using the disturbance force or the disturbance torque output from the coordinate transformation unit, states of the machine drive systems, predetermined equation models, and cutting conditions.Type: ApplicationFiled: August 30, 2017Publication date: October 22, 2020Applicants: Mitsubishi Electric Corporation, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kazuki TAKAHEI, Ryosuke IKEDA, Norikazu SUZUKI, Shoya OHNO
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Patent number: 10300539Abstract: A virtual plane obtained by a locus when a tangent line, which passes through a tool distal end edge, of a virtual circle formed when a tool distal end edge of a cutting edge is rotated in a tool circumferential direction is moved parallel to a tool axial line is a reference plane, an angle (ARt) at which a cross line of the reference plane and the cutting edge virtual plane, is inclined with respect to the tool axial line projected onto the reference plane, is in a range of ?30 degrees to ?60 degrees, an angle (RR) at which a cutting edge tangent line which passes through the tool distal end edge and extends outward in a tool radial direction, is inclined with respect to a predetermined tool radial direction, which passes through the tool distal end edge, is in a range of ?30 degrees to ?75 degrees.Type: GrantFiled: May 1, 2015Date of Patent: May 28, 2019Assignees: National University Corporation Nagoya University, Mitsubishi Heavy Industries Aero Engines, Ltd., MITSUBISHI MATERIALS CORPORATIONInventors: Eiji Shamoto, Norikazu Suzuki, Yu Hasegawa, Nobukazu Horiike, Yoichi Ishikawa
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Patent number: 10239133Abstract: A rotating tool includes a tool body which rotates around an axial line, four or more chip discharge grooves which are formed on an outer periphery of the tool body with gaps therebetween in a circumferential direction, and a plurality of cutting inserts which are arranged in multiple stages along the chip discharge grooves. In a cross-sectional view perpendicular to the axial line, when a center angle formed between a pair of virtual straight lines which connects each of the cutting edges of the cutting inserts disposed in a pair of chip discharge grooves adjacent to each other in the circumferential direction and the axial line to each other is defined as an angle, a plurality of angles formed around the axial line include one maximum angle (?max), one minimum angle (?min), and two or more angles other than the angle (?max) and the angle (?min).Type: GrantFiled: March 29, 2016Date of Patent: March 26, 2019Assignees: National University Corporation Nagoya University, MITSUBISHI MATERIALS CORPORATIONInventors: Norikazu Suzuki, Jun Kitajima
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Publication number: 20180071840Abstract: A rotating tool includes a tool body which rotates around an axial line, four or more chip discharge grooves which are formed on an outer periphery of the tool body with gaps therebetween in a circumferential direction, and a plurality of cutting inserts which are arranged in multiple stages along the chip discharge grooves. In a cross-sectional view perpendicular to the axial line, when a center angle formed between a pair of virtual straight lines which connects each of the cutting edges of the cutting inserts disposed in a pair of chip discharge grooves adjacent to each other in the circumferential direction and the axial line to each other is defined as an angle, a plurality of angles formed around the axial line include one maximum angle (?max), one minimum angle (?min), and two or more angles other than the angle (?max) and the angle (?min).Type: ApplicationFiled: March 29, 2016Publication date: March 15, 2018Inventors: Norikazu Suzuki, Jun Kitajima
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Publication number: 20170113287Abstract: A virtual plane obtained by a locus when a tangent line, which passes through a tool distal end edge, of a virtual circle formed when a tool distal end edge of a cutting edge is rotated in a tool circumferential direction is moved parallel to a tool axial line is a reference plane, an angle (ARt) at which a cross line of the reference plane and the cutting edge virtual plane, is inclined with respect to the tool axial line projected onto the reference plane, is in a range of ?30 degrees to ?60 degrees, an angle (RR) at which a cutting edge tangent line which passes through the tool distal end edge and extends outward in a tool radial direction, is inclined with respect to a predetermined tool radial direction, which passes through the tool distal end edge, is in a range of ?30 degrees to ?75 degrees.Type: ApplicationFiled: May 1, 2015Publication date: April 27, 2017Inventors: Eiji Shamoto, Norikazu Suzuki, Yu Hasegawa, Nobukazu Horiike, Yoichi Ishikawa
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Patent number: 9126300Abstract: In a machine tool which includes a rotary shaft configured to allow a tool or a workpiece to be attached thereto, a driving unit for causing the rotary shaft to rotate is regulated to change a rotation speed of the rotary shaft in such a manner that the rotation speed oscillates with a given amplitude and a given period with respect to a given mean rotation speed, so that chatter vibrations can be suppressed. A parameter display control unit configured to cause a display device to display parameter information related to predetermined parameters for changing at least one of the mean rotation speed, the amplitude and the period is provided so that the parameters can be changed based upon the parameter information displayed in the display device.Type: GrantFiled: October 11, 2011Date of Patent: September 8, 2015Assignees: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Kohei Nishimura, Kiyoshi Yoshino, Hajimu Ishii, Akihide Hamaguchi, Norikazu Suzuki, Eiji Shamoto
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Patent number: 8374717Abstract: A vibration suppressing method and a vibration suppressing device are disclosed. After a tool is attached to a main spindle, a modal parameter of the tool or a workpiece is computed. Thereafter, a relation between chatter frequency and phase difference is calculated as an approximation formula based on the obtained modal parameter and machining conditions. If chatter vibration occurs after initiation of the machining, a chatter frequency corresponding to a target phase difference is obtained using the approximation formula, and based on the obtained chatter frequency, the number of tool flutes and the main spindle rotation speed, the optimum rotation speed is calculated. The rotation speed of the main spindle is then changed in accordance with the obtained optimum rotation speed.Type: GrantFiled: October 27, 2009Date of Patent: February 12, 2013Assignees: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Norikazu Suzuki, Eiji Shamoto, Hiroshi Ueno
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Patent number: 8256590Abstract: A vibration suppressing device and a vibration suppressing method that are capable of obtaining an accurate optimum rotation speed and shortening a time period from generation of chatter vibration to calculation of the optimum rotation speed are provided. The vibration suppressing device includes: vibration sensors for detecting time-domain vibrational accelerations of a rotary shaft in rotation; and a control device for calculating a chatter frequency and a frequency-domain vibrational acceleration of the rotary shaft at the chatter frequency on the basis of the time-domain vibrational accelerations detected by the vibration sensors, and when the calculated frequency-domain vibrational acceleration exceeds a predetermined threshold value, calculating an optimum rotation speed on the basis of a predetermined parameter, and rotating the rotary shaft at the calculated optimum rotation speed.Type: GrantFiled: April 22, 2008Date of Patent: September 4, 2012Assignees: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Norikazu Suzuki, Eiji Shamoto, Hiroshi Inagaki
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Patent number: 8229598Abstract: A calculating member carries out Fourier analysis of a vibrational acceleration to calculate a maximum acceleration and frequency thereof. The calculating member then compares the maximum acceleration with a threshold value, and when the acceleration exceeds the threshold value, the calculating member calculates a k-value and phase information, and stores each calculated value. When retrying is selected, the calculating member determines a type of a current chatter vibration from the phase information, determines the existence of a chatter vibration which is different from the determined chatter vibration, and calculates each new phase information according to the determined chatter vibration and an existence of a different chatter vibration which had been generated before generation of the current vibration. The calculating member then calculates a k1-value from new phase information, calculates the optimum rotation speed by using the k1-value, and changes the rotation speed to the optimum rotation speed.Type: GrantFiled: August 13, 2008Date of Patent: July 24, 2012Assignees: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Norikazu Suzuki, Eiji Shamoto, Akihide Hamaguchi
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Publication number: 20120109360Abstract: In a machine tool which includes a rotary shaft configured to allow a tool or a workpiece to be attached thereto, a driving unit for causing the rotary shaft to rotate is regulated to change a rotation speed of the rotary shaft in such a manner that the rotation speed oscillates with a given amplitude and a given period with respect to a given mean rotation speed, so that chatter vibrations can be suppressed. A parameter display control unit configured to cause a display device to display parameter information related to predetermined parameters for changing at least one of the mean rotation speed, the amplitude and the period is provided so that the parameters can be changed based upon the parameter information displayed in the display device.Type: ApplicationFiled: October 11, 2011Publication date: May 3, 2012Applicants: National University Corporation Nagoya University, Okuma CorporationInventors: Kohei NISHIMURA, Kiyoshi YOSHINO, Hajimu ISHII, Akihide HAMAGUCHI, Norikazu SUZUKI, Eiji SHAMOTO
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Publication number: 20100104388Abstract: A vibration suppressing method and a vibration suppressing device are disclosed. After a tool is attached to a main spindle, a modal parameter of the tool or a workpiece is computed. Thereafter, a relation between chatter frequency and phase difference is calculated as an approximation formula based on the obtained modal parameter and machining conditions. If chatter vibration occurs after initiation of the machining, a chatter frequency corresponding to a target phase difference is obtained using the approximation formula, and based on the obtained chatter frequency, the number of tool flutes and the main spindle rotation speed, the optimum rotation speed is calculated. The rotation speed of the main spindle is then changed in accordance with the obtained optimum rotation speed.Type: ApplicationFiled: October 27, 2009Publication date: April 29, 2010Applicants: OKUMA CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Norikazu Suzuki, Eiji Shamoto, Hiroshi Ueno
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Publication number: 20090069927Abstract: A calculating member carries out Fourier analysis of a vibrational acceleration to calculate a maximum acceleration and frequency thereof. The calculating member then compares the maximum acceleration with a threshold value, and when the acceleration exceeds the threshold value, the calculating member calculates a k-value and phase information, and stores each calculated value. When retrying is selected, the calculating member determines a type of a current chatter vibration from the phase information, determines the existence of a chatter vibration which is different from the determined chatter vibration, and calculates each new phase information according to the determined chatter vibration and an existence of a different chatter vibration which had been generated before generation of the current vibration. The calculating member then calculates a k1-value from new phase information, calculates the optimum rotation speed by using the k1-value, and changes the rotation speed to the optimum rotation speed.Type: ApplicationFiled: August 13, 2008Publication date: March 12, 2009Applicants: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Norikazu Suzuki, Eiji Shamoto, Akihide Hamaguchi
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Publication number: 20080289923Abstract: A vibration suppressing device and a vibration suppressing method that are capable of obtaining an accurate optimum rotation speed and shortening a time period from generation of chatter vibration to calculation of the optimum rotation speed are provided. The vibration suppressing device 10 includes: vibration sensors 2a to 2c for detecting time-domain vibrational accelerations of a rotary shaft 3 in rotation; and a control device 5 for calculating a chatter frequency and a frequency-domain vibrational acceleration of the rotary shaft 3 at the chatter frequency on the basis of the time-domain vibrational accelerations detected by the vibration sensors 2a to 2c, and when the calculated frequency-domain vibrational acceleration exceeds a predetermined threshold value, calculating an optimum rotation speed on the basis of a predetermined parameter, and rotating the rotary shaft 3 at the calculated optimum rotation speed.Type: ApplicationFiled: April 22, 2008Publication date: November 27, 2008Applicants: Okuma Corporation, National University Corporation Nagoya UniversityInventors: Norikazu SUZUKI, Eiji Shamoto, Hiroshi Inagaki
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Patent number: 6776563Abstract: An elliptical vibratory cutting apparatus includes a control mechanism which applies a sinusoidal voltage having a predetermined phase difference to piezoelectric elements. Flexure vibrations are accordingly generated in X and Y directions. The vibrations in the X direction cause interference with the vibrations in the Y direction and vice versa. An amount of interference, caused by vibrations in one direction, with vibrations in another direction, is correctively eliminated by the control mechanism (interference eliminating unit. A workpiece is thus cut by means of a cutting tool through elliptical vibrations with high precision.Type: GrantFiled: February 21, 2002Date of Patent: August 17, 2004Inventors: Eiji Shamoto, Norikazu Suzuki, Toshimichi Moriwaki, Makoto Matsuo