Patents by Inventor Yudai Yamamoto

Yudai Yamamoto 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: 20190283101
    Abstract: Provided are: a method for producing a molded material comprising tubular body and a flange formed at an end portion of the body; and a molded material produced thereby, which can prevent the flange of the molded material becoming unnecessarily thick, avoid the generation of wrinkles and buckling, and allow weight reduction of the molded material and size reduction of a base metal sheet. When producing the molded material by molding processes including at least one drawing-out process and at least one drawing process performed after the drawing-out process, a first drawing process is carried out on a region corresponding to the body while opening a die and a drawing sleeve, and an ironing process is carried out on a region corresponding to the flange while keeping a constant interval of a mold gap between the die and the drawing sleeve.
    Type: Application
    Filed: February 21, 2017
    Publication date: September 19, 2019
    Inventors: Naofumi Nakamura, Yudai Yamamoto
  • Publication number: 20190232352
    Abstract: A formed material manufacturing method according to present invention includes the steps of forming a convex formed portion by performing at least one forming process on a surface treated metal plate, and performing ironing on the formed portion using an ironing mold after forming the formed portion. The ironing mold includes a punch that is inserted into the formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface of the pushing hole extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Jun KUROBE
  • Publication number: 20190054515
    Abstract: An object of the present invention is to provide a method for manufacturing a molded member, which can maintain high accuracy circularity of an inner diameter of a tubular body even if a thickness of a base metal sheet varies and which can prevent occurrence of adhesion, seizure of the like of the base metal sheet to a die used for finishing ironing. The base metal sheet is subjected to multi-stage drawing to manufacture the molded member including a tubular body and a flange formed at an end portion of the body. The multi-stage drawing includes: preliminary drawing for forming a preliminary body having a body element from the base metal sheet; at least one compression drawing performed after the preliminary drawing and forming the body by drawing the body element while applying a compressive force to the body element; and at least one finishing ironing performed after the at least one compression drawing to ensure dimensional accuracy.
    Type: Application
    Filed: March 2, 2017
    Publication date: February 21, 2019
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO
  • Publication number: 20190047034
    Abstract: Provided is a method for producing a molded material by molding processes including at least one drawing-out process and at least one drawing process performed after the drawing-out process, in which a width of a punch 31 used in the drawing-out process on a rear end side is wider than a width of the punch on a distal end side, and an ironing process is performed on a region corresponding to a flange of a base metal sheet 2 by pushing the base metal sheet together with the punch 31 into a pushing hole 30a, and the drawing process is carried out using a die and a drawing sleeve, and processing is performed on a region subjected to the ironing process in the drawing-out process, while maintaining a constant mold gap between the die and the drawing sleeve.
    Type: Application
    Filed: February 21, 2017
    Publication date: February 14, 2019
    Inventors: Naofumi Nakamura, Yudai Yamamoto
  • Publication number: 20180099325
    Abstract: A formed material 1 having a cylindrical trunk portion 10 and a flange portion 11 formed at an end section of the trunk portion is manufactured by performing multi-stage drawing of a material metal sheet. Multi-stage drawing includes: preliminary drawing that forms, from a material metal sheet 2, a preform 20 having a trunk element 20a; compression drawing that is performed at least once after the preliminary drawing and that forms the trunk portion 10 by drawing the trunk element 20a while applying a pressure-adjustable compressive force to the trunk element 20a; and finish-ironing that is performed for securing dimensional precision at least once following the compression drawing.
    Type: Application
    Filed: March 15, 2016
    Publication date: April 12, 2018
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO
  • Patent number: 9901970
    Abstract: A formed material having a tubular body and a flange formed at an end of the body is manufactured by multistage drawing of a blank metal sheet. The multistage drawing includes preliminary drawing in which a preliminary body having a body preform is formed from the blank metal sheet, and at least one compression drawing which is performed after the preliminary drawing and in which the body is formed by drawing the body preform while applying a compressive force to the body preform. The at least one compression drawing is performed so as to be completed before the pad portion of pressurization means reaches bottom dead center, and a support force supporting the pad portion acts as the compressive force upon the body preform when the body preform is drawn.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: February 27, 2018
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi Nakamura, Yudai Yamamoto, Katsuhide Nishio
  • Patent number: 9744580
    Abstract: An ironing mold according to the present invention is provided with a punch, and a die which forms a pushing hole with respect to the punch. When the skewness Rsk of a surface treated metal plate is less than ?0.6 and no less than ?1.3, then the curvature radius of a shoulder portion of the die and a clearance between a radius end and the punch are determined such that Y, which is expressed by {(tre?cre)/tre}×100, and X, which is expressed by r/tre, satisfy 0<Y?18.7X?6.1, X satisfies X?0.6 and r satisfies r?0.5 h.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: August 29, 2017
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Naofumi Nakamura, Yudai Yamamoto, Jun Kurobe
  • Patent number: 9669440
    Abstract: A formed material is manufactured by performing forming including at least one drawing-out process and at least one drawing process performed after the drawing-out process. A punch 31 used in the drawing-out process is formed to be wider on a rear end side than on a tip end side. By pushing a raw material metal plate into a pushing hole 30a together with the punch 31, ironing is performed on a region of the raw material metal plate corresponding to a flange portion.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: June 6, 2017
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Naofumi Nakamura, Yudai Yamamoto, Jun Kurobe
  • Publication number: 20170128998
    Abstract: The invention provides a formed material manufacturing method by which unnecessary thickening of a flange can be avoided. The formed material manufacturing method allows a formed material to be manufactured by forming processes that include at least one drawing-out process, at least one drawing process performed after the drawing-out process, and at least one coining process performed after the drawing process. The width of the rear end side of a punch used in the drawing-out process is set to be wider than the width of the tip end side thereof. An ironing process is performed on a region corresponding to the flange of the base metal sheet by pushing the base metal sheet together with the punch into a pushing hole.
    Type: Application
    Filed: February 6, 2015
    Publication date: May 11, 2017
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Katsuhide NISHIO
  • Patent number: 9552099
    Abstract: There is provided a portable terminal including a display panel having a display surface with a touch pad, an area management unit which defines a plurality of display areas formed by dividing the display surface, and a display control unit which performs control on an image display in each display area. In a state where two display areas are defined with a first boundary line, in response to a touch operation on the touch pad, the area management unit determines, based on a touch position of the touch operation, a second boundary line passing one point on the first boundary line and one point within a predetermined range from the touch position and defines two areas which are formed by dividing an object area of the two display areas with the second boundary line, as first and second display areas in place of the object area.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: January 24, 2017
    Assignee: KYOCERA Corporation
    Inventor: Yudai Yamamoto
  • Patent number: 9527128
    Abstract: An ironing mold according to the present invention includes a punch that is inserted into a formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: December 27, 2016
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Naofumi Nakamura, Yudai Yamamoto, Jun Kurobe
  • Publication number: 20160339498
    Abstract: An ironing mold according to the present invention is provided with a punch, and a die which forms a pushing hole with respect to the punch. When the skewness Rsk of a surface treated metal plate is less than ?0.6 and no less than ?1.3, then the curvature radius of a shoulder portion of the die and a clearance between a radius end and the punch are determined such that Y, which is expressed by {(tre?cre)/tre}×100, and X, which is expressed by r/tre, satisfy 0<Y?18.7X?6.1, X satisfies X?0.6 and r satisfies r?0.5 h.
    Type: Application
    Filed: April 15, 2014
    Publication date: November 24, 2016
    Applicant: Nisshin Steel Co., Ltd.
    Inventors: Naofumi Nakamura, Yudai Yamamoto, Jun Kurobe
  • Publication number: 20160311006
    Abstract: A formed material manufacturing method according to present invention includes the steps of forming a convex formed portion by performing at least one forming process on a surface treated metal plate, and performing ironing on the formed portion using an ironing mold after forming the formed portion. The ironing mold includes a punch that is inserted into the formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface of the pushing hole extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.
    Type: Application
    Filed: October 23, 2014
    Publication date: October 27, 2016
    Applicant: Nisshin Steel Co., Ltd.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Jun KUROBE
  • Publication number: 20160207085
    Abstract: A formed material is manufactured by performing forming including at least one drawing-out process and at least one drawing process performed after the drawing-out process. A punch 31 used in the drawing-out process is formed to be wider on a rear end side than on a tip end side. By pushing a raw material metal plate into a pushing hole 30a together with the punch 31, ironing is performed on a region of the raw material metal plate corresponding to a flange portion.
    Type: Application
    Filed: May 14, 2014
    Publication date: July 21, 2016
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Jun KUROBE
  • Publication number: 20160144418
    Abstract: A formed material having a tubular body and a flange formed at an end of the body is manufactured by multistage drawing of a blank metal sheet. The multistage drawing includes preliminary drawing in which a preliminary body having a body preform is formed from the blank metal sheet, and at least one compression drawing which is performed after the preliminary drawing and in which the body is formed by drawing the body preform while applying a compressive force to the body preform. The at least one compression drawing is performed so as to be completed before the pad portion of pressurization means reaches bottom dead center, and a support force supporting the pad portion acts as the compressive force upon the body preform when the body preform is drawn.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 26, 2016
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Katsuhide NISHIO
  • Publication number: 20160034098
    Abstract: There is provided a portable terminal including a display panel having a display surface with a touch pad, an area management unit which defines a plurality of display areas formed by dividing the display surface, and a display control unit which performs control on an image display in each display area. In a state where two display areas are defined with a first boundary line, in response to a touch operation on the touch pad, the area management unit determines, based on a touch position of the touch operation, a second boundary line passing one point on the first boundary line and one point within a predetermined range from the touch position and defines two areas which are formed by dividing an object area of the two display areas with the second boundary line, as first and second display areas in place of the object area.
    Type: Application
    Filed: October 9, 2015
    Publication date: February 4, 2016
    Applicant: KYOCERA CORPORATION
    Inventor: Yudai YAMAMOTO
  • Publication number: 20160001349
    Abstract: An ironing mold according to the present invention includes a punch that is inserted into a formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.
    Type: Application
    Filed: July 10, 2013
    Publication date: January 7, 2016
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Jun KUROBE
  • Patent number: 9158448
    Abstract: There is provided a portable terminal including a display panel having a display surface with a touch pad, an area management unit which defines a plurality of display areas formed by dividing the display surface, and a display control unit which performs control on an image display in each display area. In a state where two display areas are defined with a first boundary line, in response to a touch operation on the touch pad, the area management unit determines, based on a touch position of the touch operation, a second boundary line passing one point on the first boundary line and one point within a predetermined range from the touch position and defines two areas which are formed by dividing an object area of the two display areas with the second boundary line, as first and second display areas in place of the object area.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: October 13, 2015
    Assignee: KYOCERA Corporation
    Inventor: Yudai Yamamoto
  • Patent number: 8582268
    Abstract: An open magnetic circuit coil (6) is arranged on a line connecting a battery (1) to a charger (CH1). Furthermore, a resistor (2) is connected in series with a large-capacitance electrolytic capacitor (7) for smoothing a charger output which is connected to the output of the charger (CH1). This can suppress an abrupt change in current flowing in the connection line between the battery (1) and the charger (CH1) in connection between plugs (3a, 3b).
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: November 12, 2013
    Assignee: Panasonic Corporation
    Inventors: Yudai Yamamoto, Akeyuki Komatsu
  • Publication number: 20120293433
    Abstract: There is provided a portable terminal including a display panel having a display surface with a touch pad, an area management unit which defines a plurality of display areas formed by dividing the display surface, and a display control unit which performs control on an image display in each display area. In a state where two display areas are defined with a first boundary line, in response to a touch operation on the touch pad, the area management unit determines, based on a touch position of the touch operation, a second boundary line passing one point on the first boundary line and one point within a predetermined range from the touch position and defines two areas which are formed by dividing an object area of the two display areas with the second boundary line, as first and second display areas in place of the object area.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 22, 2012
    Applicant: KYOCERA CORPORATION
    Inventor: Yudai YAMAMOTO