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公开(公告)号：US11293835B2
公开(公告)日：2022-04-05
申请号：US16750717
申请日：2020-01-23
Applicant: Fanuc Corporation
Inventor： Ryusuke Miyata , Hiroshi Takigawa
Abstract: A laser control device includes a processor configured to control, when a control circuit of a laser device detects occurrence of an abnormality in a laser oscillator or a laser optical system and stops laser output from the laser oscillator, the control circuit based on a result of determining whether to enable or disable re-outputting of laser light from the laser oscillator by inputting, to a classifier, input data being at least a part of environmental data and state data about the laser device in a predetermined period including a stop time of laser output. Then, the state data and the input data in the predetermined period include at least one of time-series data about a light amount of laser light and time-series data about a light amount of return light propagating in a direction opposite to a direction of the laser light in the predetermined period.
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公开(公告)号：US11133643B2
公开(公告)日：2021-09-28
申请号：US16142078
申请日：2018-09-26
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Yuji Nishikawa , Hiroyuki Yoshida , Tadashi Kurosawa , Atsushi Mori , Toshiyasu Shiomi , Michinori Maeda , Akihiko Nishio
Abstract: A laser apparatus includes: a cooling capacity control means which controls the cooling capacity of a heat receiving/cooling unit; a surrounding member which surrounds a dew condensation prevention target unit including a heat generating unit and which reaches a surrounding member equilibrium temperature higher than the maximum dew point temperature within a housing as the temperature of the heat generating unit is increased; and a temperature detection means which detects the temperature of the surrounding member, a control unit compares, while a current output command is being output to a laser power supply unit, a surrounding member temperature with a switching temperature previously set lower than the surrounding member equilibrium temperature and when the surrounding member temperature is lower than the switching temperature, the control unit controls the cooling capacity control means such that the cooling capacity of the heat receiving/cooling unit is a low level whereas when the surrounding member temperature is equal to or more than the switching temperature, the control unit controls the cooling capacity control means such that the cooling capacity of the heat receiving/cooling unit is equal to or higher than a standard level.
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公开(公告)号：US20200052456A1
公开(公告)日：2020-02-13
申请号：US16533077
申请日：2019-08-06
Applicant: Fanuc Corporation
Inventor： Hiroshi Takigawa , Ryusuke Miyata
Abstract: A laser apparatus calculates a temperature of a temperature increase portion that is raised in temperature by reflection light, and determines and outputs an emergency optical output command with the aim of ensuring that the calculated temperature does not exceed a first predetermined temperature, which is set at a lower temperature than an upper limit heat resistance temperature, and if necessary, controlling the temperature to or below a second predetermined temperature set at a lower temperature than the first predetermined temperature. When the emergency optical output command is to be output, a control unit switches an optical output command output thereby to the emergency optical output command and outputs the emergency optical output command.
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公开(公告)号：US09859673B2
公开(公告)日：2018-01-02
申请号：US15165193
申请日：2016-05-26
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Hiroyuki Yoshida , Akihiko Nishio
CPC classification number: H01S3/0014 , B23K26/00 , B23K26/21 , H01S3/0407
Abstract: The laser device of the present invention includes a first temperature sensor which is provided in a housing to detect the temperature of the portion to be cooled, a second temperature sensor and a humidity sensor which are provided outside the housing to respectively detect the temperature and humidity of the air outside the housing. The laser device further includes a judgment unit which judges the possibility of condensation forming on the portion to be cooled by the air outside the housing based on each of the detected results of the first temperature sensor, the second temperature sensor and the humidity sensor, and a notification unit which gives notification of the judgment result of the judgment unit, outside the housing.
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5.发明申请公开(公告)号：US20170220927A1
公开(公告)日：2017-08-03
申请号：US15411232
申请日：2017-01-20
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Hiroyuki Yoshida , Hisatada Machida , Michinori Maeda , Ryusuke Miyata , Akinori Ohyama
CPC classification number: G06N3/08 , B23K26/032 , B23K26/21 , B23K26/38 , B23K26/702 , B23K26/705 , B23K26/707 , B23K37/006 , H01S3/10069 , H01S5/0021 , H04L67/10
Abstract: The machine learning apparatus includes: a state data observing unit which observes state data of the laser apparatus, including data output from a reflected light detecting unit for measuring a reflected light amount; an operation result acquiring unit which acquires a success/failure result indicating whether the machining has been started successfully by the laser beam output from a laser oscillator; a learning unit which learns light output command data by associating the light output command data with the state data of the laser apparatus and the success/failure result of the machining start; and a decision making unit which determines the light output command data by referring to the light output command data learned by the learning unit.
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Patent Agency Ranking
公开(公告)号：US09680289B2
公开(公告)日：2017-06-13
申请号：US15258074
申请日：2016-09-07
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Hisatada Machida
IPC: H01S3/00 , H01S5/0683 , H01S5/40 , H01S5/042
CPC classification number: H01S5/0683 , H01S3/0675 , H01S3/094011 , H01S3/094076 , H01S3/09415 , H01S5/0021 , H01S5/042 , H01S5/0617 , H01S5/06216 , H01S5/06835 , H01S5/4012 , H01S5/4025
Abstract: A laser apparatus includes laser diode module groups (LDMGs) and power supply units and provides a laser light source by collecting laser beam from the LDMGs, and comprises: a driving current supply circuit network for injecting the driving currents into the respective LDMGs, independently; a control unit which controls the driving currents independently; a first recording unit in which are recorded data representing a relationship between the driving current and optical output power, and data representing a relationship between the driving current and drive voltage; and a first calculating unit which calculates the driving currents to be allocated to the LDMGs so as to achieve maximum electrical to optical conversion efficiency, wherein the control unit allocates the driving currents to the LDMGs in accordance with the results calculated by the first calculating unit so that the LDMGs as a whole can achieve maximum electrical to optical conversion efficiency under conditions.
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公开(公告)号：US11177625B2
公开(公告)日：2021-11-16
申请号：US16835430
申请日：2020-03-31
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Hiroyuki Yoshida
Abstract: A laser apparatus comprising a laser diode module/cooling plate assembly in which a plurality of LD modules to which a driving current is supplied in series is disposed on the surface of a cooling plate, comprising: a laser power source; switch valves for switching a flow direction of a cooling liquid flowing through a cooling liquid flow path; a timing determination apparatus for determining the timing for switching the flow direction of the cooling liquid, by referencing temperature time series data of at least any one temperature variation part in the laser diode module/cooling plate assembly having temperature variations due to heat generated in a heat-generating part of the laser diode module; and a control circuit for outputting a driving current output command to the laser power source and outputting a valve switch command to the switch valves by referencing the determination result of the timing determination apparatus.
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公开(公告)号：US11167377B2
公开(公告)日：2021-11-09
申请号：US16594659
申请日：2019-10-07
Applicant: FANUC CORPORATION
Inventor： Tatsuya Mochizuki , Hiroshi Takigawa
IPC: B23K26/70 , G05B13/02 , G05B13/04 , G05B19/4097
Abstract: A 3D laser machining system comprises: a move state simulation unit that simulates a move state of a machining head using 3D CAD data about a workpiece containing material information defining thermophysical properties and 3D CAD data about a machining head under a condition of moving the machining head relative to the workpiece while the machining head is maintained at a predetermined angle a predetermined distance along a machining line in virtual space; a thermal fluid simulation unit that conducts non-stationary thermal fluid simulation for obtaining a temperature distribution in a region covering the workpiece to be changed by the move of the machining head outputting a laser beam; and a machining condition setting unit that sets a laser machining condition containing a relative move condition for the machining head and a laser beam output condition before laser machining on the basis of results of the simulations.
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公开(公告)号：US11093828B2
公开(公告)日：2021-08-17
申请号：US16240239
申请日：2019-01-04
Applicant: Fanuc Corporation
Inventor： Hiroshi Takigawa , Hisatada Machida
IPC: G06N3/08 , B23K26/03 , B23K26/70 , G06N5/00 , G06N99/00 , G06N10/00 , G06N7/00 , G06N20/00 , G06N20/10 , G06N3/00 , G06N20/20
Abstract: A machine learning device is connected to a fiber laser device. The machine learning device observes, as a state variable representing a driving state of the fiber laser device, a state quantity including time-series data on output light detection results obtained by detecting a light output of laser light emitted from the fiber laser device and time-series data on reflected light detection results obtained by detecting reflected light of the laser light, and acquires determination data representing a failure occurrence situation in the fiber laser device as determined from a difference between the output light detection results and a light output instruction of the fiber laser device. The machine learning device learns a boundary condition for failure occurrence caused by the reflected light by using the state variable and the determination data.
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公开(公告)号：US10263388B2
公开(公告)日：2019-04-16
申请号：US16003483
申请日：2018-06-08
Applicant: FANUC CORPORATION
Inventor： Hiroshi Takigawa , Hiroyuki Yoshida
Abstract: An LD module cooling device includes, in a cooling plate, common flow paths that supply/drain a cooling medium in parallel to/from a plurality of cooling portion flow paths that correspond to a plurality of LD modules, in which the cooling portion flow path is a thin layer flow path having a flow path height and a flow path width that are constant in at least a majority of a flow path length, a rectangular shape of the cooling portion flow path defined by the dimensions flow path length×flow path width overlaps with at least the majority of a main contact surface between the cooling plate and the LD modules as viewed from a front surface of the cooling plate, the flow path height of the cooling portion flow path satisfies at least either one of a condition that flow path height is 1/20 or less of the flow path length and the flow path width, and a condition that the flow path height is 0.5 mm or less, and pressure loss of a cooling medium in the cooling portion flow path is greater than pressure loss of a cooling medium in the common flow paths.
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