Patents by Inventor Shizuo Nishikawa

Shizuo Nishikawa 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).

  • Publication number: 20210276136
    Abstract: A machining condition determining apparatus (1) includes a first setter (2a) setting a cutting speed of a cutting tool, a storage (3) storing a maximum output value of a drive motor rotating a spindle holding the cutting tool and a number of revolutions of the drive motor corresponding to the maximum output value, a number-of-revolutions determiner (4) obtaining a steady-state value of the maximum output value of the drive motor stored in the storage (3) and determining a number of revolutions of the drive motor corresponding to the obtained steady-state value of the maximum output value, and a tool-diameter determiner (5) calculating a tool diameter of the cutting tool based on the cutting speed set by the first setter (2a) and the number of revolutions of the drive motor determined by the number-of-revolutions determiner (4).
    Type: Application
    Filed: May 24, 2017
    Publication date: September 9, 2021
    Applicant: DMG MORI CO., LTD.
    Inventors: Shizuo Nishikawa, Morihiro Hideta, Koji Iiyama, Masataka Sakamoto, Kengo Kawai
  • Patent number: 10987775
    Abstract: A machining state display apparatus includes an achievement degree data storage (9) storing machining condition data relating to each of sets of machining conditions and achievement degree data relating to degrees of achievement of evaluation items to be obtained in machining under each of the sets of machining conditions, with the machining condition data and the achievement degree data being associated with each other, a display part (2) displaying a set of machining conditions and degrees of achievement of the evaluation items corresponding thereto on a display (5), and an input part (6) inputting a signal for selecting one from the evaluation items and a required degree of achievement for the selected evaluation item.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: April 27, 2021
    Assignee: DMG MORI CO., LTD.
    Inventors: Shizuo Nishikawa, Koji Iiyama, Hiroki Nakao
  • Publication number: 20210069847
    Abstract: A processing system includes a control unit that generates positional information related to a position of a measuring unit at a time of measuring a processing object and outputs the generated positional information and a generation period signal indicating a period during which the positional information is generated, an acquisition unit that acquires the positional information and the generation period signal which have been output, an acquisition interval calculation unit that calculates a statistical value indicating an interval between acquisition periods regarding a plurality of generation period signals acquired by the acquisition unit, an estimation unit that estimates the period during which the positional information is generated on the basis of the statistical value calculated by the acquisition interval calculation unit, and a shape calculation unit that calculates a shape of the processing object based on measurement information, the positional information, and the period estimated by the estimat
    Type: Application
    Filed: December 25, 2017
    Publication date: March 11, 2021
    Applicants: NIKON CORPORATION, DMG MORI CO., LTD.
    Inventors: Tomoaki YAMADA, Shizuo NISHIKAWA, Satoshi MIYAMOTO, Junichi MORISHITA
  • Publication number: 20210023669
    Abstract: Provided is a machine tool (1) which is capable of measuring machining accuracy of a workpiece (W) with high accuracy and enables the time required from machining to measurement of machining accuracy to be greatly reduced. The machine tool (1) machining a workpiece (W) while moving a tool and the workpiece (W) relative to each other includes a cover (2) separating from outside a machining area for machining the workpiece (W) therein, and temperature adjusting means (30) used in machining of the workpiece (W) to adjust an ambient temperature of the machining area.
    Type: Application
    Filed: January 23, 2019
    Publication date: January 28, 2021
    Applicant: DMG MORI CO., LTD.
    Inventors: Shizuo NISHIKAWA, Masahiro SHIMOIKE, Shuji KOMATSU, Hiroki NAKAO
  • Publication number: 20190391558
    Abstract: A machine tool includes: a display; a tool configured to machine a workpiece; a spindle configured to rotate the tool or the workpiece; a sensor configured to detect a vibration frequency of the spindle or the tool; and a processor configured to control the machine tool. The processor is configured to: detect a chatter vibration in the spindle or the tool based on the vibration frequency; based on a frequency of the chatter vibration, a rotation speed of the spindle, and the number of cutting edges of the tool, calculate an order corresponding to the number of vibrations of the tool during a period of time until a current rotation angle of a first cutting edge of the tool reaches a current rotation angle of a second cutting edge of the tool; and present order information on the display, the order information indicating a magnitude of the calculated order.
    Type: Application
    Filed: June 5, 2019
    Publication date: December 26, 2019
    Applicant: DMG MORI CO., LTD.
    Inventors: Kengo Kawai, Katsuhiko Ono, Shizuo Nishikawa, Yasuhiko Morita, Masanori Murozumi, Ryo Murakami
  • Patent number: 10386815
    Abstract: A machining management apparatus includes a tool information storage storing therein information relating to each cutting tool used in a machine tool and storing therein a coefficient n and a coefficient C in a tool life equation corresponding to tool life influencing factors including at least a workpiece and a cutting tool material, and an adapted cutting speed calculator executing a machining condition receiving processing of receiving information on the tool life influencing factors and information on a desired cutting speed, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the tool life influencing factors by referring to the tool information storage based on the received tool life influencing factor information, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation based on the recognized coefficient n and coefficient C.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: August 20, 2019
    Assignee: DMG MORI CO., LTD.
    Inventors: Katsuhiko Ono, Shizuo Nishikawa, Masataka Sakamoto, Kengo Kawai
  • Patent number: 10386814
    Abstract: A machining status display apparatus includes an achievement degree data storage storing achievement degree data relating to a degree of achievement of each of predetermined machining-related evaluation items within a range determined by attainable maximum and minimum values of the evaluation item and storing the degrees of achievement of the evaluation items obtained under each of predetermined sets of machining conditions in association with the set of machining conditions, a display part displaying the degrees of achievement of the evaluation items corresponding to a selected set of machining conditions by referring to the data in the achievement degree data storage, and an input part inputting a selection signal for selecting a set of machining conditions. The display part displays the degrees of achievement of the evaluation items obtained under the set of machining conditions corresponding to the selection signal by referring to the data in the achievement degree data storage.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: August 20, 2019
    Assignee: DMG MORI CO., LTD.
    Inventors: Norihiro Kumagai, Shizuo Nishikawa, Koji Iiyama, Hiroki Nakao
  • Patent number: 10386831
    Abstract: A machining status display apparatus includes a display device having a display screen, a stability lobe picture creator creating, based on specifications of a tool to be used, display picture data for displaying a stability lobe as a correlation diagram between a spindle rotation speed and a limit depth of cut of the tool above which regenerative chatter occurs, a first machining information picture creator creating display picture data for displaying machining related information other than regenerative chatter corresponding to set machining conditions, and a display controller displaying the stability lobe and the machining related information with the stability lobe and the machining related information superimposed one on another on the display screen of the display device based on the display picture data created by the stability lobe picture creator and the display picture data created by the first machining information picture creator.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: August 20, 2019
    Assignee: DMG MORI CO., LTD.
    Inventors: Kengo Kawai, Katsuhiko Ono, Shizuo Nishikawa, Masataka Sakamoto, Morihiro Hideta, Koji Iiyama
  • Publication number: 20190134767
    Abstract: A machining state display apparatus includes an achievement degree data storage (9) storing machining condition data relating to each of sets of machining conditions and achievement degree data relating to degrees of achievement of evaluation items to be obtained in machining under each of the sets of machining conditions, with the machining condition data and the achievement degree data being associated with each other, a display part (2) displaying a set of machining conditions and degrees of achievement of the evaluation items corresponding thereto on a display (5), and an input part (6) inputting a signal for selecting one from the evaluation items and a required degree of achievement for the selected evaluation item.
    Type: Application
    Filed: March 17, 2017
    Publication date: May 9, 2019
    Applicant: DMG Mori Co., LTD.
    Inventors: Shizuo Nishikawa, Koji Iiyama, Hiroki Nakao
  • Patent number: 10145332
    Abstract: A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head (200) of an engine includes a recess (204) constituting part of the combustion chamber of the engine, and a mating surface (202) for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess (204) and a plurality of portions of the mating surface (202) by using a displacement meter, calculating differences between the respective measurement values of the mating surface (202), and the design shape of the mating surface (202) in a state in which the design shape of the surface of the recess (204) is fitted with respect to the respective measurement values of the recess (204), and deciding the cutting amount of the mating surface (202) based on the calculated differences and cutting the mating surface (202) by the decided cutting amount.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: December 4, 2018
    Assignee: DMG Mori Seiki Co., Ltd.
    Inventors: Shizuo Nishikawa, Hiroki Nakao
  • Publication number: 20180032054
    Abstract: A machining status display apparatus includes an achievement degree data storage storing achievement degree data relating to a degree of achievement of each of predetermined machining-related evaluation items within a range determined by attainable maximum and minimum values of the evaluation item and storing the degrees of achievement of the evaluation items obtained under each of predetermined sets of machining conditions in association with the set of machining conditions, a display part displaying the degrees of achievement of the evaluation items corresponding to a selected set of machining conditions by referring to the data in the achievement degree data storage, and an input part inputting a selection signal for selecting a set of machining conditions. The display part displays the degrees of achievement of the evaluation items obtained under the set of machining conditions corresponding to the selection signal by referring to the data in the achievement degree data storage.
    Type: Application
    Filed: July 14, 2017
    Publication date: February 1, 2018
    Applicant: DMG MORI CO., LTD.
    Inventors: Norihiro Kumagai, Shizuo Nishikawa, Koji Iiyama, Hiroki Nakao
  • Patent number: 9863763
    Abstract: In order to adjust the volume of the combustion chamber with high accuracy, a cylinder head 200 includes a recess 204 constituting part of the combustion chamber of the engine and a mating surface for a cylinder block. The recess 204 includes a plurality of openings to which a plurality of specific members are attached respectively. The mating surface 202 is formed to have a cutting stock with respect to three-dimensional shape data of the cylinder head 200 designed to have a target combustion chamber volume. The adjusting method further comprises measuring the surface shape of the recess and the shape of the mating surface around the recess by successively changing the irradiation position of a laser beam using a line laser displacement meter. The adjusting method further comprises removing data of regions equivalent to the plurality of openings from measurement data by comparing the measurement data obtained by the line laser displacement meter with the three-dimensional shape data.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 9, 2018
    Assignee: DMG Mori Seiki Co., Ltd.
    Inventors: Shizuo Nishikawa, Hiroki Nakao
  • Publication number: 20180004196
    Abstract: A machining status display apparatus includes a display device having a display screen, a stability lobe picture creator creating, based on specifications of a tool to be used, display picture data for displaying a stability lobe as a correlation diagram between a spindle rotation speed and a limit depth of cut of the tool above which regenerative chatter occurs, a first machining information picture creator creating display picture data for displaying machining related information other than regenerative chatter corresponding to set machining conditions, and a display controller displaying the stability lobe and the machining related information with the stability lobe and the machining related information superimposed one on another on the display screen of the display device based on the display picture data created by the stability lobe picture creator and the display picture data created by the first machining information picture creator.
    Type: Application
    Filed: June 22, 2017
    Publication date: January 4, 2018
    Applicant: DMG MORI CO., LTD.
    Inventors: Kengo Kawai, Katsuhiko Ono, Shizuo Nishikawa, Masataka Sakamoto, Morihiro Hideta, Koji Iiyama
  • Publication number: 20170364056
    Abstract: A machining management apparatus includes a tool information storage storing therein information relating to each cutting tool used in a machine tool and storing therein a coefficient n and a coefficient C in a tool life equation corresponding to tool life influencing factors including at least a workpiece and a cutting tool material, and an adapted cutting speed calculator executing a machining condition receiving processing of receiving information on the tool life influencing factors and information on a desired cutting speed, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the tool life influencing factors by referring to the tool information storage based on the received tool life influencing factor information, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation based on the recognized coefficient n and coefficient C.
    Type: Application
    Filed: May 30, 2017
    Publication date: December 21, 2017
    Applicant: DMG MORI CO., LTD.
    Inventors: Katsuhiko Ono, Shizuo Nishikawa, Masataka Sakamoto, Kengo Kawai
  • Publication number: 20170153208
    Abstract: An apparatus includes a machining executing part causing a machine tool to execute an operation of, while changing a spindle rotation speed of the machine tool in a stepwise manner, machining a workpiece by a predetermined distance or for a predetermined period of time at each spindle rotation speed, a displacement detector detecting a position displacement of a tool during the machining, a cutting force detector detecting a cutting force applied to the tool, a frequency analysis part performing frequency analysis on displacement data and cutting force data for each rotation speed to calculate a displacement spectrum and a cutting force spectrum, and a natural frequency deriving part calculating a compliance spectrum for each spindle rotation speed by deriving the displacement spectrum by the cutting force spectrum, calculating an integrated compliance spectrum by superimposing the compliance spectra, and deriving, as a natural frequency, a frequency showing the largest compliance value.
    Type: Application
    Filed: November 8, 2016
    Publication date: June 1, 2017
    Applicant: DMG MORI CO., LTD.
    Inventors: Kengo Kawai, Katsuhiko Ono, Shizuo Nishikawa
  • Publication number: 20150275819
    Abstract: A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head (200) of an engine includes a recess (204) constituting part of the combustion chamber of the engine, and a mating surface (202) for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess (204) and a plurality of portions of the mating surface (202) by using a displacement meter, calculating differences between the respective measurement values of the mating surface (202), and the design shape of the mating surface (202) in a state in which the design shape of the surface of the recess (204) is fitted with respect to the respective measurement values of the recess (204), and deciding the cutting amount of the mating surface (202) based on the calculated differences and cutting the mating surface (202) by the decided cutting amount.
    Type: Application
    Filed: March 12, 2015
    Publication date: October 1, 2015
    Inventors: Shizuo NISHIKAWA, Hiroki NAKAO
  • Publication number: 20150276393
    Abstract: In order to adjust the volume of the combustion chamber with high accuracy, a cylinder head 200 includes a recess 204 constituting part of the combustion chamber of the engine and a mating surface for a cylinder block. The recess 204 includes a plurality of openings to which a plurality of specific members are attached respectively. The mating surface 202 is formed to have a cutting stock with respect to three-dimensional shape data of the cylinder head 200 designed to have a target combustion chamber volume. The adjusting method further comprises measuring the surface shape of the recess and the shape of the mating surface around the recess by successively changing the irradiation position of a laser beam using a line laser displacement meter. The adjusting method further comprises removing data of regions equivalent to the plurality of openings from measurement data by comparing the measurement data obtained by the line laser displacement meter with the three-dimensional shape data.
    Type: Application
    Filed: March 12, 2015
    Publication date: October 1, 2015
    Inventors: Shizuo NISHIKAWA, Hiroki NAKAO
  • Patent number: 8534169
    Abstract: The present invention relates to a machining system etc. capable of highly accurately machining a workpiece even in a case where the workpiece is deflected. A machining system 1 is configured with a lathe 10 having end portion supporting mechanisms 13, 15 for supporting both end portions of an elongated workpiece W horizontally, a tool rest 20 for holding a tool, a feed mechanism for moving the tool rest 20 in three orthogonal directions, and a control device 25 for controlling the feed mechanism, and a non-contact measuring device 30 for measuring the deflection shape of the workpiece W when the workpiece W is rotated. The control device 25 moves the tool along the deflection shape measured by the non-contact measuring device 30.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: September 17, 2013
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Satoshi Miyamoto, Ryuichi Fujiwara, Shizuo Nishikawa, Hisayoshi Morita
  • Patent number: 8532811
    Abstract: A workpiece measuring apparatus has an external module provided outside an NC device to acquire position data of one or more movable axes of a movable unit having a measuring head attached thereto. The position data of the measuring head is acquired at the same time interval as that for the distance measurement by the measuring head. The position of the workpiece is acquired by calculation from the acquired distance measurement data and the position data of the measuring head. The continuous shape of the workpiece can be measured by performing continuous measurement while moving the measuring head. Therefore, no modification or change is required such as adding a new function to the NC device. In addition, the present invention is applicable to any machine tool equipped with an NC device of any configuration, without being restricted by constraints of the NC device.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: September 10, 2013
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Shizuo Nishikawa, Kenichiro Ueno, Hisayoshi Morita, Katsuhiko Ono
  • Patent number: 8397609
    Abstract: A machining system 1 comprises a lathe 10 having end portion supporting mechanisms 13, 15 for supporting an elongated workpiece W horizontally, center rests 21 for supporting the middle portion of the workpiece W, an adjustment mechanism for adjusting the supported position of the workpiece W by adjusting the height positions of the center rests 21, a tool rest 20, and a control device 25, and a non-contact measuring device 30 for measuring the deflection amount of the workpiece W at portions thereof supported by the center rests 21 when the workpiece W is rotated. The control device 25 is configured to adjust the height positions of the center rests 21 by controlling the adjustment mechanism on the basis of the measured deflection amount, so that the height positions of both end portions of the workpiece W being rotated and the middle portion thereof become the same.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: March 19, 2013
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Satoshi Miyamoto, Ryuichi Fujiwara, Shizuo Nishikawa, Hisayoshi Morita