Patents by Inventor Hiroaki Ishiguro
Hiroaki Ishiguro 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).
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Publication number: 20230166354Abstract: A skid state determination device is a skid state determination device for determining a state of a plurality of skids for supporting a workpiece to be processed by a laser processing machine, with a supporting surface formed by top points of a plurality of protrusions, and includes: imaging means configured to be able to image at least a part of a skid table provided with the plurality of skids; and state determination means configured to determine the state of the skids based on image information obtained by imaging the skid table with the imaging means, and the state determination means executes: first determination processing for determining the state of the skids based on the image information obtained by imaging the skid table with the imaging means, before the workpiece is carried onto the skid table; and second determination processing for determining the state of the skids based on the image information obtained by imaging the skid table with the imaging means, after the workpiece is carried out fromType: ApplicationFiled: April 20, 2021Publication date: June 1, 2023Inventors: Jun SETOGUCHI, Masato TAKATSU, Hiroaki ISHIGURO
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Publication number: 20230075250Abstract: A process fiber including a core extending along a central axis and a clad covering a circumference of the core includes an outer edge portion constituting an outer edge of a core cross section obtained by vertically cutting the core. The outer edge portion includes seven sides and seven corner portions respectively connecting the sides adjacent to each other. Each of the corner portions has an R shape along a circumscribed circle circumscribed to the outer edge portion. When a diameter of the circumscribed circle is O, a diameter of an inscribed circle inscribed to the outer edge portion is I, and the number of the corner portions is n (n is an odd number), a diameter ratio ?, which is a ratio between the diameter O of the circumscribed circle and the diameter I of the inscribed circle, fulfills a predetermined condition.Type: ApplicationFiled: February 24, 2021Publication date: March 9, 2023Inventors: Ryouhei ITO, Hiroaki ISHIGURO, Masatoshi TANAKA, Tomohiko ISHIDA, Seongjin KIM
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Patent number: 11084124Abstract: A laser cutting nozzle includes an inner nozzle and an outer nozzle. The inner nozzle exhibits a tube shape having a through hole on an axis and having a diameter decreasing on a first end portion side and includes a notch extending in the axis direction along an outer peripheral surface on a second end portion side. The outer nozzle is fitted to the outer peripheral surface of the inner nozzle and includes a vent passage including the notch and communicating between the first end portion and the second end portion in the axis direction. A minimum flow cross-sectional area of the vent passage matches an opening area of the notch in an end surface on the second end portion side.Type: GrantFiled: June 5, 2018Date of Patent: August 10, 2021Assignee: AMADA HOLDINGS CO., LTD.Inventors: Masato Kunihiro, Akihiko Sugiyama, Hiroaki Ishiguro, Hironobu Miyoshi, Ryohei Ito, Yuya Mizoguchi
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Patent number: 11052489Abstract: In a laser processing method, laser lights of fiber lasers or direct diode lasers is irradiated onto an iron-based plate material from a nozzle, a nozzle with a nozzle opening whose opening diameter is preliminarily set according to a thickness of the plate material is selected from plural nozzles whose nozzle openings have different opening diameters from each other, and the plate material is cut while irradiating the laser lights onto the plate material and injecting assist gas from the nozzle opening toward the plate material.Type: GrantFiled: October 5, 2018Date of Patent: July 6, 2021Assignee: AMADA HOLDINGS CO., LTD.Inventors: Yuya Mizoguchi, Hiroaki Ishiguro, Ryohei Ito, Ryo Kobayashi, Kenji Masuda
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Patent number: 10974346Abstract: According to a laser cutting method, a processed part is laser-cut so that the processed part doesn't drop off from a sheet-shaped workpiece. In the laser cutting method, a cut slit of a pressing protrusion, which is curved due to a laser cutting process along an outline of the processed part and then presses a peripheral surface of the processed part, is preliminarily formed around the processed part to be cut out from the workpiece. Then, the laser cutting process is carried out along the outline of the processed part. The pressing protrusion curves toward the processed part due to the laser cutting process of the processed part, and then the processed part is retained by the pressing protrusion.Type: GrantFiled: March 19, 2018Date of Patent: April 13, 2021Assignee: AMADA HOLDINGS CO., LTD.Inventors: Yingjun Jin, Hitoshi Omata, Hiroaki Ishiguro, Takuya Okamoto, Hideo Hara, Masato Kunihiro
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Patent number: 10898970Abstract: A profile selector includes at least one beam-forming lens refracting a laser beam to be incident so as to convert a beam profile and emits a laser beam having a beam profile selected from a plurality of beam profiles. A collimating lens converts a laser beam of a divergent beam to be incident into collimated light. A focusing lens focuses the collimated light emitted from the collimating lens and irradiates the focused beam to a sheet metal of a processing target. A moving mechanism moves the collimating lens along an optical axis such that a deviation of a focal point is reduced caused when the beam profile of the focused beam emitted from the focusing lens is selected by the profile selector.Type: GrantFiled: May 23, 2018Date of Patent: January 26, 2021Assignee: AMADA HOLDINGS CO., LTD.Inventors: Hiroaki Ishiguro, Ryouhei Ito, Tetsuya Kobayashi
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Publication number: 20200254570Abstract: In a laser processing method, laser lights of fiber lasers or direct diode lasers is irradiated onto an iron-based plate material from a nozzle, a nozzle with a nozzle opening whose opening diameter is preliminarily set according to a thickness of the plate material is selected from plural nozzles whose nozzle openings have different opening diameters from each other, and the plate material is cut while irradiating the laser lights onto the plate material and injecting assist gas from the nozzle opening toward the plate material.Type: ApplicationFiled: October 5, 2018Publication date: August 13, 2020Applicant: AMADA HOLDINGS CO., LTD.Inventors: Yuya MIZOGUCHI, Hiroaki ISHIGURO, Ryohei ITO, Ryo KOBAYASHI, Kenji MASUDA
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Publication number: 20200189029Abstract: A profile selector includes at least one beam-forming lens refracting a laser beam to be incident so as to convert a beam profile and emits a laser beam having a beam profile selected from a plurality of beam profiles. A collimating lens converts a laser beam of a divergent beam to be incident into collimated light. A focusing lens focuses the collimated light emitted from the collimating lens and irradiates the focused beam to a sheet metal of a processing target. A moving mechanism moves the collimating lens along an optical axis such that a deviation of a focal point is reduced caused when the beam profile of the focused beam emitted from the focusing lens is selected by the profile selector.Type: ApplicationFiled: May 23, 2018Publication date: June 18, 2020Applicant: AMADA HOLDINGS CO., LTD.Inventors: Hiroaki ISHIGURO, Ryouhei ITO, Tetsuya KOBAYASHI
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Publication number: 20200147722Abstract: A laser cutting nozzle includes an inner nozzle and an outer nozzle. The inner nozzle exhibits a tube shape having a through hole on an axis and having a diameter decreasing on a first end portion side and includes a notch extending in the axis direction along an outer peripheral surface on a second end portion side. The outer nozzle is fitted to the outer peripheral surface of the inner nozzle and includes a vent passage including the notch and communicating between the first end portion and the second end portion in the axis direction. A minimum flow cross-sectional area of the vent passage matches an opening area of the notch in an end surface on the second end portion side.Type: ApplicationFiled: June 5, 2018Publication date: May 14, 2020Applicant: AMADA HOLDINGS CO., LTD.Inventors: Masato KUNIHIRO, Akihiko SUGIYAMA, Hiroaki ISHIGURO, Hironobu MIYOSHI, Ryohei ITO, Yuya MIZOGUCHI
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Patent number: 10583525Abstract: A laser processing machine includes a beam parameter product variable device, and a beam diameter variable device. The beam parameter product variable device sets beam parameter products of a laser beam to a predetermined value. The beam diameter variable device includes a first lens that is movable in an optical axis direction and having a positive focal length, and converts divergent light of a laser beam emitted from an emission end of the laser beam into convergent light, and a second lens that is movable in the optical axis direction and having a negative focal length on which the convergent light is incident. A third lens having a positive focal length, focuses the laser beam emitted from the beam diameter variable device, and irradiates a plate material with the focused laser beam.Type: GrantFiled: December 13, 2016Date of Patent: March 10, 2020Assignee: AMADA HOLDINGS CO., LTD.Inventors: Ryohei Ito, Hiroaki Ishiguro
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Publication number: 20200001401Abstract: According to a laser cutting method, a processed part is laser-cut so that the processed part doesn't drop off from a sheet-shaped workpiece. In the laser cutting method, a cut slit of a pressing protrusion, which is curved due to a laser cutting process along an outline of the processed part and then presses a peripheral surface of the processed part, is preliminarily formed around the processed part to be cut out from the workpiece. Then, the laser cutting process is carried out along the outline of the processed part. The pressing protrusion curves toward the processed part due to the laser cutting process of the processed part, and then the processed part is retained by the pressing protrusion.Type: ApplicationFiled: March 19, 2018Publication date: January 2, 2020Applicant: AMADA HOLDINGS CO., LTD.Inventors: Yingjun JIN, Hitoshi OMATA, Hiroaki ISHIGURO, Takuya OKAMOTO, Hideo HARA, Masato KUNIHIRO
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Patent number: 10413996Abstract: A laser processing machine includes a convex lens having a positive focal length, a concave lens having a negative focal length, and a focusing lens having a positive focal length. The convex lens is movable in an optical axis direction and converts divergent light of a laser beam emitted from a laser beam emission end into convergent light. The concave lens is movable in the optical axis direction and is disposed at a position that is shifted from a position where the convergent light is focused toward the convex lens side by the same distance as the focal length of the concave lens according to a position of the convex lens in the optical axis direction. The concave lens converts the convergent light into parallel light. The focusing lens focuses the laser beam emitted from the concave lens and irradiates a plate material with the focused laser beam.Type: GrantFiled: December 5, 2016Date of Patent: September 17, 2019Assignee: AMADA HOLDINGS CO., LTD.Inventors: Ryohei Ito, Hiroaki Ishiguro
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Patent number: 10328528Abstract: A piercing processing method and a laser processing machine capable of carrying out a piercing processing on a thick plate in short time are provided. It is a processing method for carrying out a piercing processing on a metallic material by laser beams with wavelengths in 1 ?m band, where the piercing processing is carried out by maintaining a range of 8?Zr/d?12 when a condensed beam diameter of the laser beams is set to be d and a Rayleigh length of the laser beams is set to be Zr. At that time, a focal position of the laser beams is set to be on a surface of a workpiece or an external of the workpiece. Then, a beam profile of the laser beams is such that the laser beams of a single mode are converted into a bowler hat shape by a beam quality tunable device.Type: GrantFiled: September 9, 2015Date of Patent: June 25, 2019Assignee: AMADA HOLDINGS CO., LTD.Inventors: Ruotao Li, Hiroaki Ishiguro
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Patent number: 10300558Abstract: A laser processing machine includes a laser oscillator. The laser oscillator excites a laser beam having a wavelength in a 1 ?m band or a shorter wavelength band. One process fiber transmits the laser beam emitted from the laser oscillator. A focusing optical element focuses, when a workpiece is irradiated with the laser beam emitted from the process fiber, the laser beam on a plurality of spots in a unit area within a unit time, the unit area having a radius of 0.5 mm of an optical axis of the laser beam, and the unit time being a time from when the workpiece starts to melt to when the melting of the workpiece ends.Type: GrantFiled: April 26, 2016Date of Patent: May 28, 2019Assignee: AMADA HOLDINGS CO., LTD.Inventors: Hiroshi Sako, Hiroaki Ishiguro, Akihiko Sugiyama, Yuya Mizoguchi
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Publication number: 20190084082Abstract: A laser processing machine includes a beam parameter product variable device, and a beam diameter variable device. The beam parameter product variable device sets beam parameter products of a laser beam to a predetermined value. The beam diameter variable device includes a first lens that is movable in an optical axis direction and having a positive focal length, and converts divergent light of a laser beam emitted from an emission end of the laser beam into convergent light, and a second lens that is movable in the optical axis direction and having a negative focal length on which the convergent light is incident. A third lens having a positive focal length, focuses the laser beam emitted from the beam diameter variable device, and irradiates a plate material with the focused laser beam.Type: ApplicationFiled: December 13, 2016Publication date: March 21, 2019Applicant: AMADA HOLDINGS CO., LTD.Inventors: Ryohei ITO, Hiroaki ISHIGURO
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Publication number: 20180361503Abstract: A laser processing machine includes a convex lens having a positive focal length, a concave lens having a negative focal length, and a focusing lens having a positive focal length. The convex lens is movable in an optical axis direction and converts divergent light of a laser beam emitted from a laser beam emission end into convergent light. The concave lens is movable in the optical axis direction and is disposed at a position that is shifted from a position where the convergent light is focused toward the convex lens side by the same distance as the focal length of the concave lens according to a position of the convex lens in the optical axis direction. The concave lens converts the convergent light into parallel light. The focusing lens focuses the laser beam emitted from the concave lens and irradiates a plate material with the focused laser beam.Type: ApplicationFiled: December 5, 2016Publication date: December 20, 2018Applicant: AMADA HOLDINGS CO., LTD.Inventors: Ryohei ITO, Hiroaki ISHIGURO
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Patent number: 10118256Abstract: Using a transmission fiber for transmitting laser beams of multiple wavelengths oscillated by a DDL module, and a laser processing machine for cutting a sheet metal with a processing head that condenses the laser beams of multiple wavelengths and irradiates them onto the sheet metal, a mild steel plate or an aluminum plate is cut, and by cutting a mild steel plate with a thickness greater than or equal to 1 mm and less than or equal to 5 mm, a surface roughness (Ra) of a cut surface of the cut mild steel plate is less than or equal to 0.4 ?m, and when an aluminum plate with a thickness greater than or equal to 1 mm and less than or equal to 5 mm is cut, a surface roughness (Ra) of a cut surface of the cut aluminum plate is less than or equal to 2.5 ?m.Type: GrantFiled: September 17, 2015Date of Patent: November 6, 2018Assignee: AMADA HOLDINGS CO., LTD.Inventors: Hiroaki Ishiguro, Akihiko Sugiyama, Hiroshi Sako
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Publication number: 20180169792Abstract: A laser processing machine includes a laser oscillator. The laser oscillator excites a laser beam having a wavelength in a 1 ?m band or a shorter wavelength band. One process fiber transmits the laser beam emitted from the laser oscillator. A focusing optical element focuses, when a workpiece is irradiated with the laser beam emitted from the process fiber, the laser beam on a plurality of spots in a unit area within a unit time, the unit area having a radius of 0.5 mm of an optical axis of the laser beam, and the unit time being a time from when the workpiece starts to melt to when the melting of the workpiece ends.Type: ApplicationFiled: April 26, 2016Publication date: June 21, 2018Applicant: AMADA HOLDINGS CO., LTD.Inventors: Hiroshi SAKO, Hiroaki ISHIGURO, Akihiko SUGIYAMA, Yuya MIZOGUCHI
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Publication number: 20170368634Abstract: A laser cutting method and a laser cutting apparatus cut a metallic work with a laser beam of a one-micrometer waveband. The method and apparatus carry out the laser cutting of the work with a ring beam RB passed through a focus position of a condenser lens 13 and having inner and outer diameters that tend to expand. The outer diameter of the ring beam is in a range of 300 ?m (micrometers) to 600 ?m, an inner diameter ratio of the same is in a range of 30% to 70%, and a focal depth of the condenser lens is in a range of 2 mm to 5 mm.Type: ApplicationFiled: September 11, 2017Publication date: December 28, 2017Applicant: AMADA COMPANY, LIMITEDInventors: Akihiko SUGIYAMA, Hiroaki ISHIGURO
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Patent number: 9821409Abstract: A laser cutting method and a laser cutting apparatus cut a metallic work with a laser beam of a one-micrometer waveband. The method and apparatus carry out the laser cutting of the work with a ring beam RB passed through a focus position of a condenser lens 13 and having inner and outer diameters that tend to expand. The outer diameter of the ring beam is in a range of 300 ?m (micrometers) to 600 ?m, an inner diameter ratio of the same is in a range of 30 % to 70 %, and a focal depth of the condenser lens is in a range of 2 mm to 5 mm.Type: GrantFiled: September 13, 2012Date of Patent: November 21, 2017Assignee: AMADA COMPANY, LIMITEDInventors: Akihiko Sugiyama, Hiroaki Ishiguro