Patents by Inventor Nobuaki Aizawa

Nobuaki Aizawa 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).

  • Patent number: 11207755
    Abstract: A detection device includes an idling feed threshold acquiring unit configured to acquire, as an idling feed threshold, a threshold of an acceptable load in an idling feed operation; an expected load acquiring unit configured to acquire, as an expected load, an expected increase in load due to execution of an actual machining operation; a calculating unit configured to calculate, based on the idling feed threshold and the expected load, an actual machining threshold which is a threshold of an acceptable load in the actual machining operation; an actual machining load acquiring unit configured to acquire, as an actual machining load, an actual load during an actual machining operation; and a detecting unit configured to detect, based on the operating mode, an excess of the actual machining load relative to the idling feed threshold or the actual machining threshold.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: December 28, 2021
    Assignee: FANUC CORPORATION
    Inventors: Nobuaki Aizawa, Hiroyuki Fujimoto
  • Patent number: 11150625
    Abstract: An evaluation work piece includes at least one of a part (B) or (G), and at least one of a part (A), (C), (D), (E), or (F). (A) is a vertical level difference part. (B) is a direction reversing part at which a direction of movement of a tool in a height direction is reversed when the tool is used for machining of a three-dimensional object including a curved surface. (C) is a corner part at which a direction of movement of the tool changes. (D) is a flat surface part. (E) is a boundary part between a flat surface and a curved surface with a changing curvature. (F) is a curved surface part having a curved surface with a changing curvature. (G) is a curved surface part at which command points are aligned regularly between adjacent tool paths on a curved surface. At least one of the part (B) or (G) is included in a cut spherical body part. A reference surface for a three-dimensional measuring machine is arranged around the cut spherical body part.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: October 19, 2021
    Assignee: FANUC CORPORATION
    Inventors: Nobuaki Aizawa, Wei Zhao
  • Publication number: 20210200179
    Abstract: To make it possible to evaluate quantitatively whether there is a problem on a machining surface. A simulator includes a memory unit that stores machining position data to be used when a machine tool machines a machining-target object, a machining surface simulation unit that uses the machining position data that is stored to perform a simulation of a machining surface, a surface texture calculation unit that calculates a surface texture of the machining surface that is simulated through the simulation of the machining surface, and a machining surface evaluation unit that evaluates the surface texture on the basis of an evaluation condition.
    Type: Application
    Filed: December 9, 2020
    Publication date: July 1, 2021
    Inventors: Nobuaki AIZAWA, Wei ZHAO
  • Publication number: 20210132581
    Abstract: To provide easy determination of a causative factor of a machining problem in a machining target or easy checking of the effectiveness of an adjustment of, e.g., a machining program, a control command such as a position command, a servo control, or machine operation. This invention includes: storage units storing pieces of machining position data obtained from machining performed based on at least two of a machining program, a control command for performing servo control on a servo motor for driving a machine tool, and pieces of feedback information related to the servo control and machine operation, the machining being performed on a machining target by the machine tool; a machined surface simulation unit performing machined surface simulations based on the stored machining position data; and a display unit displaying images of machined surfaces resulting from the machined surface simulations in a juxtaposed manner.
    Type: Application
    Filed: September 4, 2020
    Publication date: May 6, 2021
    Inventors: Nobuaki AIZAWA, Wei ZHAO
  • Publication number: 20210107108
    Abstract: A detection device includes an idling feed threshold acquiring unit configured to acquire, as an idling feed threshold, a threshold of an acceptable load in an idling feed operation; an expected load acquiring unit configured to acquire, as an expected load, an expected increase in load due to execution of an actual machining operation; a calculating unit configured to calculate, based on the idling feed threshold and the expected load, an actual machining threshold which is a threshold of an acceptable load in the actual machining operation; an actual machining load acquiring unit configured to acquire, as an actual machining load, an actual load during an actual machining operation; and a detecting unit configured to detect, based on the operating mode, an excess of the actual machining load relative to the idling feed threshold or the actual machining threshold.
    Type: Application
    Filed: September 15, 2020
    Publication date: April 15, 2021
    Applicant: FANUC CORPORATION
    Inventors: Nobuaki AIZAWA, Hiroyuki FUJIMOTO
  • Publication number: 20210063993
    Abstract: A numerical control device according to an aspect of the present disclosure controls a machine tool that machines a workpiece by way of a tool in accordance with a machining program, and includes: an offset setting unit which decides an offset direction and an offset amount with an orientation of the tool as a reference, for every tool; a test-running path calculation unit which calculates a test-running movement path of the tool obtained by offsetting by the offset amount in the offset direction from a machining movement path of the tool designated by the machining program; and an operating mode selection unit which selects either one of a machining operation mode of causing the tool to move following the machining movement path, and a test-run mode of causing the tool to move following the test-running movement path.
    Type: Application
    Filed: July 15, 2020
    Publication date: March 4, 2021
    Applicant: FANUC CORPORATION
    Inventors: Hiroyuki FUJIMOTO, Nobuaki AIZAWA
  • Patent number: 10915087
    Abstract: To provide a numerical control device capable of directly determining whether or not a cutting fluid is applied to a cutting point. A numerical control device includes a determination unit configured to make, on a basis of image data acquired when a vision sensor photographs a cutting fluid jetted from an injection nozzle toward a cutting point, determination of whether or not the cutting fluid is applied to the cutting point, and an instruction unit configured to issue an instruction to a nozzle control device configured to control a position and an attitude of the injection nozzle on a basis of a result of the determination of the determination unit.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: February 9, 2021
    Assignee: FANUC CORPORATION
    Inventors: Nobuaki Aizawa, Shouki Tani
  • Publication number: 20200319618
    Abstract: An evaluation work piece which is machined with a multi-axis machine tool that includes three linear axes and one or more rotary axes includes: at least one of a curved surface portion in which the inclination of a tool is changed, a boundary portion of two regions of a flat surface which is machined at different angles of the tool and which includes the two adjacent regions and a corner portion in which the amount of movement of the rotary axis is larger than the amount of movement of a tool tip point. The curved surface portion is preferably formed to be a free curved surface. Preferably, the evaluation work piece includes: a stage-shaped machined portion; and a twisted machined portion which is formed on the stage-shaped machined portion, the boundary portion is formed in the front surface of the stage-shaped machined portion and the curved surface portion and the corner portion are formed in the twisted machined portion.
    Type: Application
    Filed: March 4, 2020
    Publication date: October 8, 2020
    Inventors: Wei ZHAO, Nobuaki AIZAWA
  • Publication number: 20200201283
    Abstract: A numerical controller includes one or more of a first reversing point detecting unit that detects a reversing point in an axis direction of a machine based on a machining program, a second reversing point detecting unit that detects a reversing point in the axis direction based on a position command, a third reversing point detecting unit that detects a reversing point in the axis direction based on a positional deviation or position feedback information of a servo control unit that controls a servomotor which drives the axis, and a fourth reversing point detecting unit that detects a reversing point in the axis direction based on positional information of a movable portion of the machine, and a drawing unit that generates an image superimposing a reversing point location detected by the one or more reversing point detecting unit on an image of a workpiece.
    Type: Application
    Filed: November 7, 2019
    Publication date: June 25, 2020
    Inventors: Nobuaki AIZAWA, Wei ZHAO
  • Patent number: 10649441
    Abstract: A controller for a machine tool includes a machine learning apparatus configured to learn an Nth-order time-derivative component of a speed of each axis of the machine tool. The machine learning apparatus includes: a state observation section configured to observe first state data representing the Nth-order time-derivative component of the speed of each axis as a state variable representing a current state of an environment; a determination data acquisition section configured to acquire determination data representing a properness determination result of at least any one of machining accuracy, surface quality, and machining time of the machined workpiece; and a learning section configured to learn the Nth-order time-derivative component of the speed of each axis in relation to at least any one of the machining accuracy, the surface quality, and the machining time of the machined workpiece using the state variable and the determination data.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: May 12, 2020
    Assignee: FANUC CORPORATION
    Inventors: Nobuaki Aizawa, Tomokazu Kayanuma
  • Patent number: 10599125
    Abstract: Provided is a numerical controller capable of calculating an optimum feed rate in machining in which cutting is performed in a different direction from a direction of a spindle axis. The numerical controller includes a tool data storage unit for storing tool data related to a tool attached to the spindle axis, a command analyzer for reading and analyzing a command block from the machining program, and generating movement command data for relatively moving the spindle axis with respect to the workpiece and spindle axis rotation command data for rotating the spindle axis, and a cutting speed controller for calculating a recommended cutting feed rate of the spindle axis based on the tool data of the tool, and clamping a cutting feed rate of the spindle axis included in the movement command data at the recommended cutting feed rate when the cutting feed rate of the spindle axis is larger than the recommended cutting feed rate.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: March 24, 2020
    Assignee: Fanuc Corporation
    Inventors: Nobuaki Aizawa, Shouki Tani
  • Patent number: 10514681
    Abstract: A numerical controller carries out acceleration/deceleration control over an interpolation pulse produced based on command blocks. This numerical controller exercises acceleration/deceleration control processing over the interpolation pulse based on an acceleration/deceleration setting which corresponds to the command blocks, and outputs a first speed pulse. The numerical controller exercises acceleration/deceleration control processing over the first speed pulse such that command blocks overlap each other, based on an overlapping shared acceleration/deceleration setting which does not depended on the command blocks, and outputs a second speed pulse.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: December 24, 2019
    Assignee: FANUC Corporation
    Inventors: Nobuaki Aizawa, Kunihiro Honma, Nobuhito Oonishi
  • Publication number: 20190332086
    Abstract: To provide a numerical control device capable of directly determining whether or not a cutting fluid is applied to a cutting point. A numerical control device includes a determination unit configured to make, on a basis of image data acquired when a vision sensor photographs a cutting fluid jetted from an injection nozzle toward a cutting point, determination of whether or not the cutting fluid is applied to the cutting point, and an instruction unit configured to issue an instruction to a nozzle control device configured to control a position and an attitude of the injection nozzle on a basis of a result of the determination of the determination unit.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Applicant: FANUC CORPORATION
    Inventors: Nobuaki AIZAWA, Shouki TANI
  • Publication number: 20190266296
    Abstract: A machining simulation device is a machining simulation device which performs a machining simulation of the machine tool that machines a machining target based on a machining program with a tool, and includes: a machine simulation unit which performs, based on a position command and a transfer characteristic of the machine tool, a simulation of the movement of the machine tool when the machine tool is operated based on the machining program so as to estimate the position of the tool; and a machining simulation unit which performs a machining simulation of the machining target based on information of the tool and the position of the tool that is estimated.
    Type: Application
    Filed: January 17, 2019
    Publication date: August 29, 2019
    Inventors: Nobuaki AIZAWA, Hiroyuki FUJIMOTO
  • Publication number: 20190064763
    Abstract: An evaluation work piece comprises at least one of parts (A) to (G) as follows on a surface machined by a machine tool: (A) a vertical level difference part having a vertical level difference, and flat surfaces arranged on both sides of the vertical level difference; (B) a direction reversing part at which a direction of movement of a tool in a height direction is reversed when the tool is used for machining of a three-dimensional object including a curved surface; (C) a corner part at which a direction of movement of the tool changes; (D) a flat surface part; (E) a boundary part between a flat surface and a curved surface with a changing curvature; (F) a curved surface part having a curved surface with a changing curvature; and (G) a curved surface part at which command points are aligned regularly between adjacent tool paths on a curved surface.
    Type: Application
    Filed: August 24, 2018
    Publication date: February 28, 2019
    Inventors: Nobuaki AIZAWA, Wei ZHAO
  • Publication number: 20180307211
    Abstract: A controller for a machine tool includes a machine learning apparatus configured to learn an Nth-order time-derivative component of a speed of each axis of the machine tool. The machine learning apparatus includes: a state observation section configured to observe first state data representing the Nth-order time-derivative component of the speed of each axis as a state variable representing a current state of an environment; a determination data acquisition section configured to acquire determination data representing a properness determination result of at least any one of machining accuracy, surface quality, and machining time of the machined workpiece; and a learning section configured to learn the Nth-order time-derivative component of the speed of each axis in relation to at least any one of the machining accuracy, the surface quality, and the machining time of the machined workpiece using the state variable and the determination data.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 25, 2018
    Inventors: Nobuaki AIZAWA, Tomokazu KAYANUMA
  • Publication number: 20180307198
    Abstract: A machined surface quality evaluation device includes a machine learning device that learns a result of evaluation on machined surface quality of a workpiece by an observer which correspond to an inspection result on the machined surface quality of the workpiece. The machine learning device observes the inspection result on the machined surface quality of the workpiece as a state variable, acquires label data indicating the result of the evaluation on the machined surface quality of the workpiece by the observer, and learns the state variable and the label data in a manner such that they are correlated each other.
    Type: Application
    Filed: April 19, 2018
    Publication date: October 25, 2018
    Inventors: Nobuaki AIZAWA, Tomokazu KAYANUMA, Zheng TONG
  • Patent number: D853456
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: July 9, 2019
    Assignee: FANUC CORPORATION
    Inventors: Nobuaki Aizawa, Tomokazu Kayanuma, Wei Zhao
  • Patent number: D879168
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: March 24, 2020
    Assignee: FANUC CORPORATION
    Inventors: Wei Zhao, Nobuaki Aizawa
  • Patent number: D901562
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: November 10, 2020
    Assignee: FANUC CORPORATION
    Inventors: Wei Zhao, Nobuaki Aizawa