Patents by Inventor Tsunehiko Yamazaki

Tsunehiko Yamazaki 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: 20050263510
    Abstract: The invention provides a device which optically checks a nozzle tip of a laser machining tool. A camera unit 450 which is raised and lowered in opposing relation to a nozzle 65 of a laser beam machine has a camera chamber 454 and is sealed by protective glass 456, where the camera chamber 454 contains a CCD camera body 460 and lens 462. While a ring light 470 illuminates a surface of the nozzle 65, the CCD camera body 460 checks the nozzle 65 optically.
    Type: Application
    Filed: May 4, 2005
    Publication date: December 1, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyakawa
  • Publication number: 20050263509
    Abstract: The invention provides a nozzle presetter for laser machining tool of laser beam machine for externally making position adjustments of nozzles for laser machining tools mounted on a laser beam machine. A nozzle presetter 900 has a base 910, and a support portion 912 is mounted on an upper part of the base 910 to removably support a laser machining tool 60. An alternative beam source 920 is mounted at the center position in an upper part of the support portion 912. A target member 930 is removably mounted on a nozzle mounting member 660 of the laser machining tool 60 via mounting means 654. The target member 930 has a photoreceptor 940 mounted just under a center hole 932. The photoreceptor. 940 senses the quantity of light reaching the photoreceptor through the center hole 932 of the target member 930. The operator changes the axial position of the nozzle mounting member 660 using four adjustment screws 670.
    Type: Application
    Filed: May 4, 2005
    Publication date: December 1, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyakawa
  • Publication number: 20050263502
    Abstract: The present invention provides a method for performing piercing preferentially on a laser beam machine by taking advantage of a capability to change laser machining tools automatically. A laser beam machine is equipped with a device for changing a torch and nozzle automatically. The laser beam machine is equipped with a means of selecting preferential treatment of piercing after nesting data is prepared by a CAM or NC system and performs piercing alone in favor of cutting by changing to a special-purpose piercing tool.
    Type: Application
    Filed: May 4, 2005
    Publication date: December 1, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyakawa
  • Patent number: 6965810
    Abstract: A model producing means for modeling a chip model at an edge of a solid model of a nozzle through a predetermined space in a three-dimensional virtual space, and a trace machining propriety judging means for watching a state of an interference between the chip model and the solid model of a workpiece at the time of simulation of laser beam machining program and outputting a predetermined signal when releasing the state of the interference are provided. If an inconvenient instruction wherein the nozzle and the workpiece do not face each other is included in the laser beam machining program, the chip model departs from the solid model of the workpiece and the trace machining propriety judging means outputs a predetermined signal, through which program error can be properly detected with no visual observation of an operator.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: November 15, 2005
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Publication number: 20050185566
    Abstract: A laser beam generating unit has a semiconductor laser unit having a plurality of beam emitting portions located in the shape of a matrix, and a plurality of optical fibers for individually transmitting laser beam emitted from the beam emitting portions. An optical fiber bundle is formed by binding a plurality of the optical fibers on a side where laser beam emits, and laser beam is emitted through a taper adaptor provided on the side where laser beam emits. Then, laser beam can be transmitted by the optical fibers at a good condition, and can be collected by a beam transmitting path of the adaptor having the thinner diameter with high efficiency and the power density can be raised.
    Type: Application
    Filed: February 20, 2005
    Publication date: August 25, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Publication number: 20050187652
    Abstract: A model producing means for modeling a chip model at an edge of a solid model of a nozzle through a predetermined space in a three-dimensional virtual space, and a trace machining propriety judging means for watching a state of an interference between the chip model and the solid model of a workpiece at the time of simulation of laser beam machining program and outputting a predetermined signal when releasing the state of the interference are provided. If an inconvenient instruction wherein the nozzle and the workpiece do not face each other is included in the laser beam machining program, the chip model departs from the solid model of the workpiece and the trace machining propriety judging means outputs a predetermined signal, through which program error can be properly detected with no visual observation of an operator.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 25, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Publication number: 20050184032
    Abstract: A machine tool is comprised of a tool rest for supporting a plurality of tools, and a laser beam generating means for generating laser beam. When installing a tool for cutting machining on the tool rest, cutting machining can be performed on a worpiece. When installing a tool for emitting laser beam on the tool rest, a hardening can be performed on the workpiece. Only by change of a tool, both cutting machining and hardening can be performed.
    Type: Application
    Filed: February 23, 2005
    Publication date: August 25, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Publication number: 20050178749
    Abstract: Voltage fluctuating time integrating means integrates voltage fluctuating time when voltage of a sensor electrode fluctuates as a voltage fluctuation integrated time, and voltage fluctuation occurrence rate computing means computes a rate of occurrence of voltage fluctuation for time on the basis of the voltage fluctuation integrated time integrated. By doing so, quantity of generated plasma can be taken as the rate of occurrence of voltage fluctuation, and plasma detection judging means can easily detect large volume of generated plasma on the basis of the computed voltage fluctuation occurrence rate. Then, it is not necessary to provide a circuit for measuring electric resistance between the sensor electrode and a workpiece as a conventional way, thereby avoiding complexly structured plasma detector.
    Type: Application
    Filed: January 31, 2005
    Publication date: August 18, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Publication number: 20050178753
    Abstract: A laser beam machine can make quality of machining almost constant in such a manner that a first reflecting means in a first beam guide portion is moved and driven so as to maintain a length of an optical path of laser beam to be almost constant in spite of a moved position of a machining head. According to the invention, a second reflecting means for catching laser beam in a second beam guide portion is located at a position facing the first reflecting means, thereby relatively shortening a length of the optical path between the first and second reflecting means and shortening the whole length of the optical path, and maintaining quality of machining with laser beam good.
    Type: Application
    Filed: February 9, 2005
    Publication date: August 18, 2005
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa
  • Patent number: 6930275
    Abstract: At the time of execution of concurrent six-axes cylindrical interpolation instruction wherein a start point, an intermediate point, an end point and feed speed are instructed in a machining program PRO, a machining data computing portion 59 computes angular velocity of first, second, and third rotational axis directions and moving speed of first, second and third axial directions so as to correspond the feed speed of a torch with respect to a workpiece with the feed speed instructed in the machining program PRO, and the machining control portion 55 simultaneously controls the first, second and third axes and the first, second and third rotational axes on the basis of the angular velocity and the moving speed which are computed so as to rotate a chuck holding the workpiece and to move the torch, so that machining on the workpiece is executed.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: August 16, 2005
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa, Toshihiko Inoue
  • Patent number: 6922420
    Abstract: A workpiece is irradiated by a laser beam scanned in an oscillating track as the workpiece is advanced along a feed path in a hardening process. Sinusoidal variations in scan velocity are offset by decreasing the laser beam power level at phases in the scanning cycles corresponding to high and low scan displacement peaks, where the scan velocity is least. The beam power is increased near the scanning center line where the scan velocity is highest. The beam energy applied per unit of area is thus equalized over the scanning cycle. The workpiece temperature can be sampled at regular phases by a non-contact temperature sensor in the optical path, and used to control beam power versus phase in a subsequent scanning cycle. Alternatively or in addition, a sinusoidal beam power pattern can be stored and used to offset scan velocity variations as a function of phase.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: July 26, 2005
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa, Toshihiko Inoue, Toshihiko Asari, Masaaru Matsumura
  • Patent number: 6922607
    Abstract: In a numerically controlled method of moving an object to be controlled along a predetermined locus, controlling control axes, the locus is made approximate to a spatial polynomial, a polynomial is converted into a polynomial as time function, the polynomial converted as time function is distributed to each control axis, control command in each control axis is produced on the basis of the polynomial distributed to each axis as time function, and the object to be controlled is moved along the locus, controlling each control axis on the basis of the control command. The velocity, the acceleration and the jerk of the object to be controlled can be easily obtained concerning each control axis in advance by differentiating the polynomial expressed by time function. The object to be controlled is controlled so as to move along the locus expressed by the polynomial, feeding irregularity or position shift is reduced and curved face machining at high accuracy is possible.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: July 26, 2005
    Inventors: Tsunehiko Yamazaki, Kohei Ohnishi, Naoomi Miyagawa, Toshihiko Inoue
  • Publication number: 20050071020
    Abstract: In a numerically controlled method of moving an object to be controlled along a predetermined locus, controlling control axes, the locus is made approximate to a spatial polynomial, a polynomial is converted into a polynomial as time function, the polynomial converted as time function is distributed to each control axis, control command in each control axis is produced on the basis of the polynomial distributed to each axis as time function, and the object to be controlled is moved along the locus, controlling each control axis on the basis of the control command. The velocity, the acceleration and the jerk of the object to be controlled can be easily obtained concerning each control axis in advance by differentiating the polynomial expressed by time function. The object to be controlled is controlled so as to move along the locus expressed by the polynomial, feeding irregularity or position shift is reduced and curved face machining at high accuracy is possible.
    Type: Application
    Filed: November 23, 2004
    Publication date: March 31, 2005
    Inventors: Tsunehiko Yamazaki, Kohei Ohnishi, Naoomi Miyagawa, Toshihiko Inoue
  • Patent number: 6723949
    Abstract: A sharp corner judgment means judges as to whether a corner of cut shape in a workpiece is a sharp corner is not on the basis of a machining program. When the corner is regarded as the sharp corner, an additional locus producing means for producing sharp corner produces an additional locus for producing sharp corner when machining on the corner regarded as the sharp corner, and a sharp corner machining execution means executes machining on the corner on the basis of the produced additional locus for producing sharp corner. Then, the additional locus for producing sharp corner can be automatically produced for the sharp corner so as to execute machining.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: April 20, 2004
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa, Toshihiko Inoue, Hikaru Iryoda
  • Patent number: 6708382
    Abstract: In a complex tool to be installed on a machine tool capable of turning machining and milling machining operations, a main body is provided, and carries inserts for turning machining, inserts for milling machining and inserts for drilling machining. Turning machining and drilling/milling machining operations can be executed using the inserts installed on the main body, without the need for tool exchange, saving time and labor. The inserts as installed have opposite rotational cutting directions, and are placed on opposite sides of concavities that extend radially inwardly and axially back from the end of the main body. The inserts can be placed at the same or different cutting distances and can be brought into engagement with the workpiece by selection of the relative orientations of the rotation axis and the workpiece.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: March 23, 2004
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Sadami Miyazaki
  • Patent number: 6705186
    Abstract: A sensor 42d is provided for detecting release of a state of a workpiece fixed and held with workpiece holding members during rotation of a spindle 9. When the release of the state of the wokpiece fixed and held is detected, the sliding members are driven in a direction of an axial center (in a direction as shown by an arrow D) by a reciprocating drive means 42. Even if holding force, such as the oil pressure of the workpiece holding member, is lowered, the decrease of the holding force of the workpiece can be extremely avoided by moving the sliding members in the direction of the workpiece.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: March 16, 2004
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Haruhiko Koike, Noboru Yamamoto
  • Patent number: 6679503
    Abstract: A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are operated by a rotating operation jig at an outer peripheral side of the chuck unit. A workpiece end face abutment moves and holds the workpiece in the axial direction.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: January 20, 2004
    Assignee: Yamazaki Mazak Kabushiki Kaisha
    Inventors: Tsunehiko Yamazaki, Haruhiko Koike, Noboru Yamamoto
  • Patent number: 6661130
    Abstract: A linear motor has a stationary member shaped as a channel and a moving member therein, with a magnet and an armature producing force for displacing the moving member along the channel. A first air flow path for cooling is defined along the path of the moving member in the channel. The moving member can have channels allowing cooling air to flow through. The channel can be closed over by a cover band passing through a slit in the moving member and closed or lifted by rollers on the moving member. The channel can be supplied with forced air flow by a blower and/or an exhaust fan, and preferably includes a filter for excluding metallic particles from the first air flow path.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: December 9, 2003
    Inventors: Tsunehiko Yamazaki, Kohei Ohnishi, Naoomi Miyagawa, Toshihiko Inoue
  • Publication number: 20030222058
    Abstract: A sharp corner judgment means judges as to whether a corner of cut shape in a workpiece is a sharp corner is not on the basis of a machining program. When the corner is regarded as the sharp corner, an additional locus producing means for producing sharp corner produces an additional locus for producing sharp corner when machining on the corner regarded as the sharp corner, and a sharp corner machining execution means executes machining on the corner on the basis of the produced additional locus for producing sharp corner. Then, the additional locus for producing sharp corner can be automatically produced for the sharp corner so as to execute machining.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 4, 2003
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa, Toshihiko Inoue, Hikaru Iryoda
  • Publication number: 20030192867
    Abstract: At the time of execution of concurrent six-axes cylindrical interpolation instruction wherein a start point, an intermediate point, an end point and feed speed are instructed in a machining program PRO, a machining data computing portion 59 computes angular velocity of first, second, and third rotational axis directions and moving speed of first, second and third axial directions so as to correspond the feed speed of a torch with respect to a workpiece with the feed speed instructed in the machining program PRO, and the machining control portion 55 simultaneously controls the first, second and third axes and the first, second and third rotational axes on the basis of the angular velocity and the moving speed which are computed so as to rotate a chuck holding the workpiece and to move the torch, so that machining on the workpiece is executed.
    Type: Application
    Filed: April 14, 2003
    Publication date: October 16, 2003
    Inventors: Tsunehiko Yamazaki, Naoomi Miyagawa, Toshihiko Inoue