Patents by Inventor Tatsuhiko KABUTOMORI
Tatsuhiko KABUTOMORI 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: 20230324316Abstract: A measurement system according to an aspect of the present invention enables measurement of an intensity distribution of diffracted X-rays obtained by irradiating a fillet portion of a metallic structure with X-rays, the metallic structure comprising: an axis portion; and a flange portion protruding radially from the axis portion, wherein the metallic structure comprises the fillet portion in a connection portion between the axis portion and the flange portion, the measurement system including: a diffracted X-rays measurement device provided with an irradiation unit that irradiates the fillet portion with X-rays; and a positioning device that positions the diffracted X-rays measurement device with respect to the fillet portion, in which the positioning device including: a moving mechanism that moves three-dimensionally the diffracted X-rays measurement device relative to the fillet portion; and a rotation mechanism that rotates the diffracted X-rays measurement device in such a direction that an angle of inciType: ApplicationFiled: August 18, 2021Publication date: October 12, 2023Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hitomi ADACHI, Mariko MATSUDA, Ryota YAKURA, Tatsuhiko KABUTOMORI
-
Publication number: 20230304876Abstract: A method measuring a residual stress of a fillet portion, where an angle of incidence of X-rays denoted by ? [°], a fillet radius denoted by R [mm], a fillet angle denoted by ? [°], a vertical width of a housing of an X-ray stress measuring apparatus denoted by W [mm], a width of a detection region of a two-dimensional detector denoted by D [mm], a complementary angle of a Bragg angle denoted by ? [°], and an interval between a flange portion and an imaginary straight line which passes through a fillet center and is parallel to the flange portion denoted by a [mm], formula 1 is satisfied; when ? ? 0, an irradiation distance L [mm] of the X-rays, the irradiation distance L satisfies formula 2; and when ? < 0, the irradiation distance L satisfies formula 3.Type: ApplicationFiled: April 22, 2021Publication date: September 28, 2023Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Mariko MATSUDA, Tatsuhiko KABUTOMORI, Hiroyuki TAKAMATSU
-
Patent number: 11221304Abstract: A method for measuring the stress of a concave section of a test subject which comprises a metal and has a surface and a concave section, the method including: a detection step for detecting, using a two-dimensional detector, a diffraction ring of diffracted X-rays which is formed by causing X-rays to be incident on the concave section and to be diffracted by the concave section; and a calculation step for calculating the stress of the concave section on the basis of the detection results during the detection step. Therein, the detection step involves causing X-rays to be incident on each of a plurality of sites inside the concave section of the test subject, and detecting, using a two-dimensional detector, the diffraction ring formed by the diffraction of the X-rays by the concave section.Type: GrantFiled: April 6, 2018Date of Patent: January 11, 2022Assignee: Kobe Steel, Ltd.Inventors: Hiroyuki Takamatsu, Toshihide Fukui, Mariko Matsuda, Tatsuhiko Kabutomori
-
Publication number: 20210055173Abstract: A method for measuring a residual stress, including irradiating a cast and forged steel product with X-rays; two-dimensionally detecting intensities of diffracted X-rays originating from the X-rays; and calculating a residual stress based on a diffraction ring formed by an intensity distribution of the diffracted X-rays, wherein the irradiating includes changing a condition for irradiation of the cast and forged steel product with the X-rays, the irradiating is a step of performing the changing each time the cast and forged steel product is irradiated with the X-rays, the calculating is a step of calculating the residual stress each time the cast and forged steel product is irradiated with the X-rays, and the method further includes averaging a plurality of residual stresses calculated in the calculating after the irradiating, the detecting, and the calculating are performed in this order a plurality of times.Type: ApplicationFiled: November 30, 2018Publication date: February 25, 2021Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Mariko MATSUDA, Tatsuhiko KABUTOMORI, Hiroyuki TAKAMATSU
-
Patent number: 10914692Abstract: A method that measures stress of a test subject including a metal includes: detecting, using a two-dimensional detector, a diffraction ring of diffracted X-rays which is formed by causing X-rays from an irradiation unit to be incident on the test subject and to be diffracted by the test subject; and calculating the stress of the test subject based on detection results during the detection step. Therein, the detection step involves causing X-rays from the irradiation unit to be incident on each of a plurality of sites on the test subject with the irradiation unit angled relative to the test subject in a manner such that the angle of incidence on the test subject is within the range of 5-20°, inclusive, and detecting, using a two-dimensional detector, the diffraction ring formed by the diffraction of the X-rays by the test subject.Type: GrantFiled: April 6, 2018Date of Patent: February 9, 2021Assignee: Kobe Steel, Ltd.Inventors: Hiroyuki Takamatsu, Toshihide Fukui, Mariko Matsuda, Tatsuhiko Kabutomori
-
Publication number: 20200340933Abstract: The present invention is a method for measuring a residual stress in a cast and forged steel product, the method using X-rays, including: irradiating a cast and forged steel product with X-rays; two-dimensionally detecting intensities of diffracted X-rays originating from the X-rays; and calculating a residual stress based on a diffraction ring formed by an intensity distribution of the diffracted X-rays detected in the detecting, wherein, when the residual stress is measured for each of a plurality of measurement positions of the cast and forged steel product, the residual stress for each of the measurement positions is calculated in the calculating based on the diffraction ring for each of the measurement positions and an X-ray elastic constant which varies for each of the measurement positions.Type: ApplicationFiled: December 21, 2018Publication date: October 29, 2020Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Mariko MATSUDA, Tatsuhiko KABUTOMORI, Hiroyuki TAKAMATSU
-
Publication number: 20200141885Abstract: A method for measuring the stress of a concave section of a test subject which comprises a metal and has a surface and a concave section, the method including: a detection step for detecting, using a two-dimensional detector, a diffraction ring of diffracted X-rays which is formed by causing X-rays to be incident on the concave section and to be diffracted by the concave section; and a calculation step for calculating the stress of the concave section on the basis of the detection results during the detection step. Therein, the detection step involves causing X-rays to be incident on each of a plurality of sites inside the concave section of the test subject, and detecting, using a two-dimensional detector, the diffraction ring formed by the diffraction of the X-rays by the concave section.Type: ApplicationFiled: April 6, 2018Publication date: May 7, 2020Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroyuki TAKAMATSU, Toshihide FUKUI, Mariko MATSUDA, Tatsuhiko KABUTOMORI
-
Publication number: 20200072769Abstract: A method that measures stress of a test subject including a metal includes: detecting, using a two-dimensional detector, a diffraction ring of diffracted X-rays which is formed by causing X-rays from an irradiation unit to be incident on the test subject and to be diffracted by the test subject; and calculating the stress of the test subject based on detection results during the detection step. Therein, the detection step involves causing X-rays from the irradiation unit to be incident on each of a plurality of sites on the test subject with the irradiation unit angled relative to the test subject in a manner such that the angle of incidence on the test subject is within the range of 5-20°, inclusive, and detecting, using a two-dimensional detector, the diffraction ring formed by the diffraction of the X-rays by the test subject.Type: ApplicationFiled: April 6, 2018Publication date: March 5, 2020Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Hiroyuki TAKAMATSU, Toshihide FUKUI, Mariko MATSUDA, Tatsuhiko KABUTOMORI