公开(公告)号：US11521105B2

公开(公告)日：2022-12-06

申请号：US15481575

申请日：2017-04-07

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya ,  Yasuo Yamada

IPC: G06N20/00 ,  G01M15/14 ,  G01N29/14 ,  G01N29/44 ,  G06N3/04 ,  G06N3/08 ,  G01M15/02 ,  G06N5/04 ,  H04L67/10

Abstract: A machine learning device which learns fault prediction of one of a main shaft of a machine tool and a motor driving the main shaft, including a state observation unit observing a state variable including at least one of data output from a motor controller controlling the motor, data output from a detector detecting a state of the motor, and data output from a measuring device measuring a state of the one of the main shaft and the motor; a determination data obtaining unit obtaining determination data upon determining one of whether a fault has occurred in the one of the main shaft and the motor and a degree of fault; and a learning unit learning the fault prediction of the one of the main shaft and the motor in accordance with a data set generated based on a combination of the state variable and the determination data.

公开(公告)号：US20210003637A1

公开(公告)日：2021-01-07

申请号：US16909021

申请日：2020-06-23

Applicant: Fanuc Corporation

Inventor： Yohei Kamiya

IPC: G01R31/34

Abstract: A motor information acquisition system is provided that acquires information representing an operation state of a motor included in a machine tool in order to monitor a state of the machine tool and that includes a motor control device configured to control the motor based on control data, a timing generation section configured to generate acquisition timing of the information representing the operation state of the motor based on the control data, a rotor magnetic flux reduction command output section configured to output a command for reducing a magnetic flux density of a rotor of the motor to the motor control device when the acquisition timing is reached, and a motor information acquisition section configured to acquire information representing the operation state of the motor when the magnetic flux density of the rotor is reduced by the command.

公开(公告)号：US10439464B2

公开(公告)日：2019-10-08

申请号：US15890029

申请日：2018-02-06

Applicant: FANUC CORPORATION

Inventor： Chao Zhi ,  Yohei Kamiya

IPC: H02K7/08 ,  H02K5/16 ,  F16C35/067 ,  H02K5/173 ,  F16C19/06 ,  F16C35/04

Abstract: A motor includes a rotor including a shaft and a rotor body, a bearing fitted to the shaft and rotatably holding the shaft, a bearing holder arranged on the opposite side to the rotor body so as to hold the bearing, a movement regulation member arranged closer to the rotor body than the bearing and separated to regulate movement of the bearing toward the rotor body, a first engagement part provided at the rotor body to be adjacent to the movement regulation member, a first engagement target part provided at the movement regulation member to be adjacent to the rotor body to be able to be engaged with the first engagement target part, a second engagement part provided at the movement regulation member, a second engagement target part provided at the bearing holder, and a coupling member that couples the bearing holder and the movement regulation member.

公开(公告)号：US20190033821A1

公开(公告)日：2019-01-31

申请号：US16045948

申请日：2018-07-26

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: G05B19/404

Abstract: A numerical control method at least controls a spindle motor of a machine tool so as to perform machining in accordance with machining conditions. In the method, vibration occurring in a tool is acquired with a vibration acquisition unit, and the machining on a workpiece performed by a machining control unit is stopped when vibration having a predetermined amplitude or greater occurs in the tool. Based on state data indicating the state of the spindle motor at that time, multiple compensation plans for compensating the state of the spindle motor in order to suppress vibration occurring in the tool are calculated. The thus calculated multiple compensation plans are displayed on a display unit together with the state of the spindle motor at the time of occurrence of vibration having the predetermined amplitude or greater in the tool.

公开(公告)号：US10024758B2

公开(公告)日：2018-07-17

申请号：US15135495

申请日：2016-04-21

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: G08B21/00 ,  G01M13/00 ,  B23Q17/00 ,  G01M13/04

CPC classification number: G01M13/00 ,  B23Q1/70 ,  B23Q17/00 ,  B23Q17/008 ,  G01M13/04

Abstract: An abnormality detecting device and method for detecting a symptom of a failure of a spindle of a machine tool before the spindle malfunctions. The abnormality detecting device for detecting an abnormality or malfunction includes a spindle motor and a motor controller. The motor controller includes a time measuring part which measures a spindle stopping time from when a free-run of the spindle motor accelerated to a predetermined number of rotations is started to when the spindle motor is stopped, a storing part which stores the spindle stopping time measured by the time measuring part, and a comparing part which compares a plurality of data with respect to the spindle stopping time stored in the storing part, and judges as to whether or not an abnormality exists in the spindle or the spindle motor.

公开(公告)号：US10364840B2

公开(公告)日：2019-07-30

申请号：US15959952

申请日：2018-04-23

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: F16C19/52 ,  G05B19/18 ,  G07C3/08 ,  G07C3/00

Abstract: A failure detection device includes a formaldehyde sensor that detects the generation of formaldehyde, a vibration sensor that detects vibration of a spindle head, and a machine controller that detects the occurrence of an abnormality of a spindle bearing. The machine controller determines the occurrence of the abnormality of the spindle bearing and a cause of the abnormality based on a change in the output value of the formaldehyde sensor over time and a change in the output value of the vibration sensor over time.

公开(公告)号：US10284048B2

公开(公告)日：2019-05-07

申请号：US15725371

申请日：2017-10-05

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: H02K5/10 ,  H02K5/15 ,  B01D45/14 ,  H02K15/00 ,  H02K5/124 ,  H02K5/18 ,  H02K5/12 ,  H02K7/08 ,  H02K7/14

Abstract: An electric motor is provided with an annular member supported by a cylindrical member of a front housing. The annular member includes an opposite part spaced from a surface of a ring member in a rotary shaft, which extends in the circumferential direction. The annular member includes first cover part opposed to first surface of the ring member, and second cover part opposed to second surface of the ring member. The first cover part and the second cover part are spaced from the ring member so that a pressure in a space sandwiched by the first cover part and the first surface is equalized with a pressure in a space sandwiched by the second cover part and the second surface.

公开(公告)号：US10270307B2

公开(公告)日：2019-04-23

申请号：US15725365

申请日：2017-10-05

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: H02K9/00 ,  H02K5/10 ,  B01D45/14 ,  B08B5/02 ,  B08B17/02 ,  H02K15/00 ,  H02K5/124 ,  B23Q11/08 ,  H02K7/14 ,  H02K9/26

Abstract: A front housing of an electric motor includes an air discharging member for discharging air toward a rotary shaft. The front housing includes an annular first air chamber that is formed in the air discharging member, and an annular second air chamber that is formed outside the first air chamber. The front housing includes an air supply path for supplying compressed air to the second air chamber, and a connection flow passage for causing the first air chamber to communicate with the second air chamber. The connection flow passage is formed at a position other than a position of the air supply path in the circumferential direction of the housing.

公开(公告)号：US20190006899A1

公开(公告)日：2019-01-03

申请号：US16120963

申请日：2018-09-04

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: H02K1/32 ,  H02K7/06 ,  B23Q11/12 ,  B23Q11/10 ,  H02K7/14 ,  H02K1/27 ,  H02K9/04

CPC classification number: H02K1/32 ,  B23Q11/1015 ,  H02K1/2706 ,  H02K7/06 ,  H02K7/14 ,  H02K9/04

Abstract: A spindle structure capable of accelerating the flow of a fluid in through holes of a rotor. The spindle structure includes a rotatable rotation part. The rotation part includes a tool holding part provided at an axial direction one end of the rotation part and through holes that penetrate the rotation part and open at the end in the axial direction. Further the spindle structure includes a vane provided in the through holes. When the rotation part rotates, the vane rotates with the rotation part to allow a fluid in the interior of the through holes to flow toward the end in the axial direction.

公开(公告)号：US20160344248A1

公开(公告)日：2016-11-24

申请号：US15082236

申请日：2016-03-28

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya

IPC: H02K1/32 ,  B23Q11/12 ,  H02K9/04 ,  B23Q11/10 ,  H02K7/14 ,  H02K1/27

CPC classification number: H02K1/32 ,  B23Q11/1015 ,  B23Q11/127 ,  H02K1/2706 ,  H02K7/06 ,  H02K7/14 ,  H02K9/04

Abstract: A spindle structure capable of accelerating the flow of a fluid in through holes of a rotor. The spindle structure includes a rotatable rotation part. The rotation part includes a tool holding part provided at an axial direction one end of the rotation part and through holes that penetrate the rotation part and open at the end in the axial direction. Further the spindle structure includes a vane provided in the through holes. When the rotation part rotates, the vane rotates with the rotation part to allow a fluid in the interior of the through holes to flow toward the end in the axial direction.

Abstract translation: 能够加速转子通孔中的流体流动的主轴结构。 主轴结构包括可旋转的旋转部分。 旋转部包括沿轴向设置在旋转部的一端的工具保持部和穿过旋转部的贯通孔，并且在轴向的端部开口。 此外，主轴结构包括设置在通孔中的叶片。 当旋转部旋转时，叶片与旋转部一起旋转，使得通孔内部的流体朝向轴向端部流动。