Patents by Inventor Eiji Iizuka
Eiji Iizuka 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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Patent number: 11931788Abstract: Provided is a technology capable of suppressing an edge crack occurring due to stretch flange deformation without being constrained by a target pressed component shape. The technology includes two-stage cutting processing of, when it is estimated that there is concern about risk of occurrence of an edge crack due to stretch flange deformation on an edge of a material (1) to be pressed in press forming, performing twice cutting processing on an edge including at least a site where there is concern about risk of occurrence of the edge crack as pre-processing for press forming in which there is concern about risk of occurrence of the edge crack. In the two-stage cutting processing, cutting to form a partial, beam-shaped overhang portion at a position including a site where there is concern about risk of occurrence of the edge crack is performed in the first cutting and the overhang portion is cut in the second cutting.Type: GrantFiled: January 20, 2020Date of Patent: March 19, 2024Assignee: JFE Steel CorporationInventors: Takeshi Ogawa, Eiji Iizuka
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METHOD FOR MANUFACTURING PRESSED COMPONENT, METHOD FOR MANUFACTURING BLANK MATERIAL, AND STEEL SHEET
Publication number: 20230113628Abstract: A technology capable of suppressing end cracking due to a delayed fracture without restrictions on the target pressed component shape. When it is estimated that the end cracking due to the delayed fracture in an end of a material to be pressed is concerned, double cutting processing including performing cutting processing of the end containing at least a place where the end cracking is concerned twice is provided as preprocessing for the press forming causing the concern about the end cracking. The double cutting processing includes performing, in first cutting, cutting to form a partial beam-shaped projection portion at a position containing the place where the end cracking is concerned, and cutting the projection portion in second cutting.Type: ApplicationFiled: March 18, 2021Publication date: April 13, 2023Applicant: JFE STEEL CORPORATIONInventors: Eiji IIZUKA, Toyohisa SHINMIYA, Takeshi OGAWA -
Publication number: 20220222398Abstract: A method and device for specifying a portion causing a discrepancy in springback amount between CAE analysis and an actual formed product.Type: ApplicationFiled: April 22, 2020Publication date: July 14, 2022Applicant: JFE STEEL CORPORATIONInventors: Takeshi OGAWA, Masaki URABE, Eiji IIZUKA
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Publication number: 20220219217Abstract: A method and apparatus for identifying a portion that is a factor causing a discrepancy in springback amount between a press-formed product and a CAE analysis.Type: ApplicationFiled: April 16, 2020Publication date: July 14, 2022Applicant: JFE STEEL CORPORATIONInventors: Takeshi OGAWA, Masaki URABE, Eiji IIZUKA
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Publication number: 20220040748Abstract: Provided is a technology capable of suppressing an edge crack occurring due to stretch flange deformation without being constrained by a target pressed component shape. The technology includes two-stage cutting processing of, when it is estimated that there is concern about risk of occurrence of an edge crack due to stretch flange deformation on an edge of a material (1) to be pressed in press forming, performing twice cutting processing on an edge including at least a site where there is concern about risk of occurrence of the edge crack as pre-processing for press forming in which there is concern about risk of occurrence of the edge crack. In the two-stage cutting processing, cutting to form a partial, beam-shaped overhang portion at a position including a site where there is concern about risk of occurrence of the edge crack is performed in the first cutting and the overhang portion is cut in the second cutting.Type: ApplicationFiled: January 20, 2020Publication date: February 10, 2022Applicant: JFE Steel CorporationInventors: Takeshi Ogawa, Eiji Iizuka
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Patent number: 10639695Abstract: A method is provided for press forming a product having a shape of a top board portion, a vertical wall portion continuously formed from the top board portion and a flange portion continuously formed from the vertical wall portion at a press process of two or more stages, wherein a convex or concave bead shape is preformed in a position of a flat metal sheet as a raw material corresponding to a neighborhood of a position generating breakage or flange wrinkles when the raw material is formed into a product shape, and thereafter a product shape is press formed from the raw material having the preformed bead shape.Type: GrantFiled: January 26, 2015Date of Patent: May 5, 2020Assignee: JFE Steel CorporationInventors: Toyohisa Shinmiya, Tsuyoshi Shiozaki, Eiji Iizuka, Yuji Yamasaki
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Patent number: 10413956Abstract: There is provided a press forming method capable of suppressing a camber back, which occurs in a hat-shaped member while reducing a restriction on a shape of the hat-shaped member. At a time of the press forming, a blank material (4) in which a longitudinal line length is at least longer than a longitudinal line length of a top plate portion of a hat-shaped member (5) is fixed between a pair of press dies (lower die (2), upper die (3)), which have bent surfaces (convex surface (2a), concave surface (3a)), while being warped upward, that is, in a bending direction of the lower die (2) and the upper die (3). Subsequently, for the fixed blank material (4), a bent portion of the hat-shaped member (5) is press formed by using the convex surface (2a) and the concave surface (3a).Type: GrantFiled: January 23, 2015Date of Patent: September 17, 2019Assignee: JFE CorporationInventors: Toyohisa Shinmiya, Yuji Yamasaki, Eiji Iizuka
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Patent number: 10226807Abstract: A press forming method includes portions of a blank corresponding to straight portions of product is press formed to a hat or channel cross-sectional shape prior to a portion of the blank corresponding to a curved portion of the product at an approached state of the both ends to thereby leave a surplus in a length of the portion of the blank corresponding to the curved portion of the product as compared to a length of the curved portion; then the portion of the blank corresponding to the curved portion of the product is press formed to a longitudinal curved shape at a state of leaving the surplus while forming the hat or channel cross-sectional shape to thereby apply a longitudinal compression stress to the portion of the blank corresponding to curved portion of the product.Type: GrantFiled: February 16, 2015Date of Patent: March 12, 2019Assignee: JFE Steel CorporationInventors: Toyohisa Shinmiya, Yuji Yamasaki, Eiji Iizuka
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Patent number: 10220428Abstract: A press forming method forms a metal plate into the part shape having at least a top surface portion and side wall portions continuous with both left and right sides of the top surface portion, the part shape having a U-shaped or hat-shaped cross section and having one or two or more bent portions bent in a longitudinal direction that is a direction intersecting the cross section. The press forming method includes: a first step of applying in-plane shear deformation to a plate portion on both sides or one side of the bent portions in the longitudinal direction of the metal plate, the in-plane shear deformation corresponding to a direction of bending the portion of the part shape; and a second step of implementing press forming for the metal plate into the part shape, the metal plate to which the in-plane shear deformation has been applied.Type: GrantFiled: October 21, 2014Date of Patent: March 5, 2019Assignee: JFC STEEL CORPORATIONInventors: Yusuke Fujii, Toyohisa Shinmiya, Eiji Iizuka, Yuji Yamasaki
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Patent number: 10022766Abstract: There is provided a method of manufacturing a curved channel part having a curved portion in a vertical wall portion by press forming, the method restricting stretch flange deformation, which occurs in the vertical wall portion and a flange portion. The method includes a shear deformation step as a step of forming the vertical wall portion. In the shear deformation step, a boundary-side portion of a base section of a blank with respect to a deformation section, and an outer portion of the deformation section are individually restrained, a portion to be a vertical wall portion of the deformation section is shear-deformed in a sheet face, and a material is caused to flow from a portion separated from a curved portion toward the curved portion in an outer edge portion of the portion to be the vertical wall portion.Type: GrantFiled: July 18, 2014Date of Patent: July 17, 2018Assignee: JFE STEEL CORPORATIONInventors: Yusuke Fujii, Toyohisa Shinmiya, Yasuhiro Kishigami, Eiji Iizuka, Yuji Yamasaki
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Publication number: 20170165735Abstract: There is provided a press forming method capable of suppressing a camber back, which occurs in a hat-shaped member while reducing a restriction on a shape of the hat-shaped member. At a time of the press forming, a blank material (4) in which a longitudinal line length is at least longer than a longitudinal line length of a top plate portion of a hat-shaped member (5) is fixed between a pair of press dies (lower die (2), upper die (3)), which have bent surfaces (convex surface (2a), concave surface (3a)), while being warped upward, that is, in a bending direction of the lower die (2) and the upper die (3). Subsequently, for the fixed blank material (4), a bent portion of the hat-shaped member (5) is press formed by using the convex surface (2a) and the concave surface (3a).Type: ApplicationFiled: January 23, 2015Publication date: June 15, 2017Applicant: JFE STEEL CORPORATIONInventors: Toyohisa Shinmiya, Yuji Yamasaki, Eiji Iizuka
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Publication number: 20170028455Abstract: A press forming method forms a metal plate into the part shape having at least a top surface portion and side wall portions continuous with both left and right sides of the top surface portion, the part shape having a U-shaped or hat-shaped cross section and having one or two or more bent portions bent in a longitudinal direction that is a direction intersecting the cross section. The press forming method includes: a first step of applying in-plane shear deformation to a plate portion on both sides or one side of the bent portions in the longitudinal direction of the metal plate, the in-plane shear deformation corresponding to a direction of bending the portion of the part shape; and a second step of implementing press forming for the metal plate into the part shape, the metal plate to which the in-plane shear deformation has been applied.Type: ApplicationFiled: October 21, 2014Publication date: February 2, 2017Applicant: JFE STEEL CORPORATIONInventors: Yusuke FUJII, Toyohisa SHINMIYA, Eiji IIZUKA, Yuji YAMASAKI
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Publication number: 20170014886Abstract: A press forming method includes portions of a blank corresponding to straight portions of product is press formed to a hat or channel cross-sectional shape prior to a portion of the blank corresponding to a curved portion of the product at an approached state of the both ends to thereby leave a surplus in a length of the portion of the blank corresponding to the curved portion of the product as compared to a length of the curved portion; then the portion of the blank corresponding to the curved portion of the product is press formed to a longitudinal curved shape at a state of leaving the surplus while forming the hat or channel cross-sectional shape to thereby apply a longitudinal compression stress to the portion of the blank corresponding to curved portion of the product.Type: ApplicationFiled: February 16, 2015Publication date: January 19, 2017Inventors: Toyohisa Shinmiya, Yuji Yamasaki, Eiji Iizuka
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Publication number: 20160354825Abstract: A method is provided for press forming a product having a shape of a top board portion, a vertical wall portion continuously formed from the top board portion and a flange portion continuously formed from the vertical wall portion at a press process of two or more stages, wherein a convex or concave bead shape is preformed in a position of a flat metal sheet as a raw material corresponding to a neighborhood of a position generating breakage or flange wrinkles when the raw material is formed into a product shape, and thereafter a product shape is press formed from the raw material having the preformed bead shape.Type: ApplicationFiled: January 26, 2015Publication date: December 8, 2016Applicant: JFE STEEL CORPORATIONInventors: Toyohisa Shinmiya, Tsuyoshi Shiozaki, Eiji Iizuka, Yuji Yamasaki
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Publication number: 20160158821Abstract: There is provided a method of manufacturing a curved channel part having a curved portion in a vertical wall portion by press forming, the method restricting stretch flange deformation, which occurs in the vertical wall portion and a flange portion. The method includes a shear deformation step as a step of forming the vertical wall portion. In the shear deformation step, a boundary-side portion of a base section of a blank with respect to a deformation section, and an outer portion of the deformation section are individually restrained, a portion to be a vertical wall portion of the deformation section is shear-deformed in a sheet face, and a material is caused to flow from a portion separated from a curved portion toward the curved portion in an outer edge portion of the portion to be the vertical wall portion.Type: ApplicationFiled: July 18, 2014Publication date: June 9, 2016Applicant: JFE STEEL CORPORATIONInventors: Yusuke FUJII, Toyohisa SHINMIYA, Yasuhiro KISHIGAMI, Eiji IIZUKA, Yuji YAMASAKI
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Patent number: 7406886Abstract: An injector has a sample chamber for retaining a small amount of sample, wherein a position of the sample chamber is controlled by transmitting light through the sample chamber and detecting the transmitted light so as to recognize the position of the sample chamber. It is possible to reduce detection error compared to the conventional injectors that indirectly control the position of the sample chamber by transmitting light through the light passage which is adjacent to the sample chamber. A method for injecting a sample comprising the steps of: providing an injector which has a sample chamber for retaining a sample with an open month; transmitting light through the sample chamber; detecting the transmitted light so as to recognize a position of the sample chamber; and controlling the position of the sample chamber by using the detection result to connect the open month of the sample chamber to an open month of a sample receiving member in order to inject the sample into the sample receiving member.Type: GrantFiled: August 3, 2007Date of Patent: August 5, 2008Assignees: Chemco Scientific Co., Ltd.Inventors: Takao Tsuda, Eiji Iizuka, Motonori Munesue
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Publication number: 20070278434Abstract: An injector has a sample chamber for retaining a small amount of sample, wherein a position of the sample chamber is controlled by transmitting light through the sample chamber and detecting the transmitted light so as to recognize the position of the sample chamber. It is possible to reduce detection error compared to the conventional injectors that indirectly control the position of the sample chamber by transmitting light through the light passage which is adjacent to the sample chamber. A method for injecting a sample comprising the steps of: providing an injector which has a sample chamber for retaining a sample with an open month; transmitting light through the sample chamber; detecting the transmitted light so as to recognize a position of the sample chamber; and controlling the position of the sample chamber by using the detection result to connect the open month of the sample chamber to an open month of a sample receiving member in order to inject the sample into the sample receiving member.Type: ApplicationFiled: August 3, 2007Publication date: December 6, 2007Applicants: CHEMCO SCIENTIFIC CO., LTD.Inventors: Takao TSUDA, Eiji IIZUKA, Motonori MUNESUE
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Patent number: 7252016Abstract: An injector has a sample chamber for retaining a small amount of sample, wherein a position of the sample chamber is controlled by transmitting light through the sample chamber and detecting the transmitted light so as to recognize the position of the sample chamber, and it is possible to reduce detection error compared to the conventional injectors that indirectly control the position of the sample chamber by transmitting light through the light passage which is adjacent to the sample chamber. A method for injecting a sample comprising the steps of: providing an injector which has a sample chamber for retaining a sample with an open month; transmitting light through the sample chamber; detecting the transmitted light so as to recognize a position of the sample chamber; and controlling the position of the sample chamber by using the detection result to connect the open month of the sample chamber to an open month of a sample receiving member in order to inject the sample into the sample receiving member.Type: GrantFiled: November 19, 2004Date of Patent: August 7, 2007Assignees: Chemco Scientific Co., Ltd.Inventors: Takao Tsuda, Eiji Iizuka, Motonori Munesue
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Publication number: 20050118072Abstract: An injector has a sample chamber for retaining a small amount of sample, wherein a position of the sample chamber is controlled by transmitting light through the sample chamber and detecting the transmitted light so as to recognize the position of the sample chamber, and it is possible to reduce detection error compared to the conventional injectors that indirectly control the position of the sample chamber by transmitting light through the light passage which is adjacent to the sample chamber. A method for injecting a sample comprising the steps of: providing an injector which has a sample chamber for retaining a sample with an open month; transmitting light through the sample chamber; detecting the transmitted light so as to recognize a position of the sample chamber; and controlling the position of the sample chamber by using the detection result to connect the open month of the sample chamber to an open month of a sample receiving member in order to inject the sample into the sample receiving member.Type: ApplicationFiled: November 19, 2004Publication date: June 2, 2005Inventors: Takao Tsuda, Eiji Iizuka, Motonori Munesue