Patents by Inventor Yukihisa Kuriyama
Yukihisa Kuriyama 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).
-
Patent number: 10406579Abstract: The present invention provides a new bending apparatus and bending method of a tube material which makes it possible to achieve all of bending by a large bending radius not requiring large scale equipment or die, bending resistant to wrinkling and buckling at an inner side of the bending, and bending with a high productivity, that is, a ram bending apparatus using a punch 12 and a set of rolls 13, 13 for three-point bending of a tube material wherein the punch 12 has a groove 12a of a width of the width of a circular tube 11 or more and wherein the set of rolls 13, 13 are supported by a frame 14. The rolls 13, 13 can freely move on the frame 14 in directions away from each other in a state contacting the punch 12. The frame 14 has a hollow space 14a enabling free movement of the descending punch 12 and the circular tube 11 bent along with this during the bending of the circular tube 11.Type: GrantFiled: September 20, 2016Date of Patent: September 10, 2019Assignee: NIPPON STEEL CORPORATIONInventors: Masaaki Mizumura, Yukihisa Kuriyama
-
Publication number: 20180075177Abstract: An apparatus for identification of a cause of occurrence of springback having a press forming analyzer for numerically analyzing forming conditions of press forming to obtain forming data of a press formed part, a springback analyzer for numerically analyzing said forming data to calculate a springback value, and a processor for processing at least one of a physical property value and physical property quantity data of part of the regions of said press formed part among forming data of said press formed part and making said springback analyzer calculate the springback value based on the results of said processing.Type: ApplicationFiled: August 29, 2017Publication date: March 15, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Tohru YOSHIDA, Shunji HIWATASHI, Seiichi DAIMARU, Yasuharu TANAKA, Takashi ARIGA, Toshiyuki NIWA, Yukihisa KURIYAMA, Satoru OKAYAMA
-
Patent number: 9767234Abstract: A method of identification of a cause of occurrence of springback comprising a press forming analysis step of numerically analyzing forming conditions of press forming to obtain forming data of a press formed part, a processing step of processing at least one of a physical property value and physical property quantity data of part of the regions of said press formed part among forming data of said press formed part, and a springback value calculation step of calculating a springback value based on the results of said processing.Type: GrantFiled: August 30, 2007Date of Patent: September 19, 2017Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Tohru Yoshida, Shunji Hiwatashi, Seiichi Daimaru, Yasuharu Tanaka, Takashi Ariga, Toshiyuki Niwa, Yukihisa Kuriyama, Satoru Okayama
-
Publication number: 20170008057Abstract: The present invention provides a new bending apparatus and bending method of a tube material which makes it possible to achieve all of bending by a large bending radius not requiring large scale equipment or die, bending resistant to wrinkling and buckling at an inner side of the bending, and bending with a high productivity, that is, a ram bending apparatus using a punch 12 and a set of rolls 13, 13 for three-point bending of a tube material wherein the punch 12 has a groove 12a of a width of the width of a circular tube 11 or more and wherein the set of rolls 13, 13 are supported by a frame 14. The rolls 13, 13 can freely move on the frame 14 in directions away from each other in a state contacting the punch 12. The frame 14 has a hollow space 14a enabling free movement of the descending punch 12 and the circular tube 11 bent along with this during the bending of the circular tube 11.Type: ApplicationFiled: September 20, 2016Publication date: January 12, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Masaaki MIZUMURA, Yukihisa KURIYAMA
-
Patent number: 9486851Abstract: The present invention provides a new bending apparatus and bending method of a tube material which makes it possible to achieve all of bending by a large bending radius not requiring large scale equipment or die, bending resistant to wrinkling and buckling at an inner side of the bending, and bending with a high productivity, that is, a ram bending apparatus using a punch 12 and a set of rolls 13, 13 for three-point bending of a tube material wherein the punch 12 has a groove 12a of a width of the width of a circular tube 11 or more and wherein the set of rolls 13, 13 are supported by a frame 14. The rolls 13, 13 can freely move on the frame 14 in directions away from each other in a state contacting the punch 12. The frame 14 has a hollow space 14a enabling free movement of the descending punch 12 and the circular tube 11 bent along with this during the bending of the circular tube 11.Type: GrantFiled: October 16, 2007Date of Patent: November 8, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Masaaki Mizumura, Yukihisa Kuriyama
-
Press-forming device, press-forming method, computer program/software arrangement and storage medium
Patent number: 8965554Abstract: Exemplary embodiments of a press-forming device, press-forming method, computer program/software arrangement and storage medium can be provided. The exemplary press-forming device can include a material characteristic input configured to input material characteristics. A state variable detector can be configured to measure a state variable comprising a metal mold distortion amount. A processing condition computer arrangement can be configured to determine from a first moment to a second moment at least one particular processing condition. Further, a processing condition controller can be configured to control the at least one processing condition from processing conditions.Type: GrantFiled: March 17, 2011Date of Patent: February 24, 2015Assignees: Nippon Steel & Sumitomo Metal Coporation, Arcelormittal FranceInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa, Takuya Kuwayama, Mitsuharu Yamagata -
Patent number: 8621904Abstract: A hydroforming apparatus and working method able to simply find a load path are proposed, which system and method use a mold in which contact sensors able to judge contact with a metal tube inside the mold are mounted at least at two different positions in the tube axial direction, perform a first step of axially pushing tube ends in a state with the internal pressure held at a constant value and stopping the progress of the axial pushing action when judging that among the contact sensors not yet in contact mounted at positions closest to the tube ends detect contact with the metal tube, next perform a second step of raising only the internal pressure while leaving the positions of the tube ends fixed and stopping the increase in the internal pressure when the contact sensor not yet in contact judges contact, next perform a third step of lowering the internal pressure to the value before raising it while leaving the positions of the tube ends fixed, and repeat said first step to third step until all of said cType: GrantFiled: June 30, 2009Date of Patent: January 7, 2014Assignees: Nippon Steel, Sumitomo Metal CorporationInventors: Masaaki Mizumura, Koichi Sato, Manabu Wada, Yukihisa Kuriyama
-
Patent number: 8543666Abstract: Exemplary embodiments of the present invention relate to a numerical analysis data providing system. The system can include a server side computer which may provide numerical analysis data to a user side computer connected to a network. The server side computer can record a material name and a property item with corresponding to any one or more types of property values from a mechanical property value, a thermal physical property value, and an electromagnetic property value as for plural materials. Such server side computer can extract one or more types of material property data from the mechanical property value, the thermal physical property value, and the electromagnetic property value corresponding to the material name and the property item recorded by a material property data storage arrangement based on the material name and the property item transmitted from the user side computer. In addition, the server side computer can transmit the extracted data to the user side computer.Type: GrantFiled: December 10, 2004Date of Patent: September 24, 2013Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa
-
Patent number: 8381560Abstract: The present invention provides a hydroforming method able to increase the expansion ratio to obtain a complicated shape hydroformed product and able to reduce the number of steps of work, that is, a hydroforming method loading a metal pipe into a divided mold, clamping the mold, then applying an internal pressure and pushing force in the pipe axial direction to said metal pipe, comprising, in a first hydroforming step, expanding said metal pipe in one direction of said metal pipe cross-section to obtain an intermediate product having a circumferential length of 90% to 100% of the circumferential length of the product shape in all of the expanded part in the pipe axial direction and having a height greater than the height of the product in said one direction and at least part of the pipe axial direction, then, in a second hydroforming step, reducing the height in the one direction of said intermediate product in all or part of the pipe axial direction while shaping the product to the final product shape.Type: GrantFiled: April 18, 2008Date of Patent: February 26, 2013Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Yukihisa Kuriyama
-
Patent number: 8297096Abstract: The object is to raise the yield by greatly eliminating the disposed amounts of the tube ends, prevent wrinkles due to closing the mold while applying internal pressure, cutting the plurality of steps of hydroforming and pre-processing of the tube ends, cutting the mold costs by simplifying the mold mechanism, and obtaining a hydroformed product formed with a flange along its entire length.Type: GrantFiled: July 18, 2008Date of Patent: October 30, 2012Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Koichi Sato, Yukihisa Kuriyama
-
Patent number: 8281630Abstract: The invention has as its object to perform hydroforming so that no buckling or wrinkles remain at a hydroformed product with a long expanded region and comprises performing a first step of raising the internal pressure in a state with the metal tube fixed in position at the two ends or a state applying axial pushing actions of 10% or less of the total amount of axial pushing action, then applying axial pushing actions while holding the internal pressure at a constant pressure so as to expand the metal tube near the ends, then performing a second step of raising only the internal pressure without applying any axial pushing action so as to thereby expand a center of the metal tube, then performing a third step of lowering only the internal pressure to the value of the constant pressure without applying any axial pushing action, then repeating the first to third steps one or more times, then raising the internal pressure in the state not applying any axial pushing action or applying an axial pushing action of 10Type: GrantFiled: June 30, 2009Date of Patent: October 9, 2012Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Koichi Sato, Manabu Wada, Yukihisa Kuriyama
-
Patent number: 8266939Abstract: The object is to raise the yield by greatly eliminating the disposed amounts of the tube ends, prevent wrinkles due to closing the mold while applying internal pressure, cutting the plurality of steps of hydroforming and pre-processing of the tube ends, cutting the mold costs by simplifying the mold mechanism, and obtaining a hydroformed product formed with a flange along its entire length.Type: GrantFiled: July 18, 2008Date of Patent: September 18, 2012Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Koichi Sato, Yukihisa Kuriyama
-
Patent number: 8191583Abstract: A hydroformed product obtained by integrally working a metal pipe material by cold plastic working, which product (x) has a bent part at least at one location, (y1) has, at least at one location of the bent part, an expanded part of dimensions of a direction toward the outer side (or inner side) of the bend in a cross-section vertical to a pipe axis and a direction vertical to that direction of at least 1.35× of a circle equivalent diameter of an end of the metal pipe, and (z1) has an inner side (outer side) of the bent part of substantially the same radius of curvature.Type: GrantFiled: April 18, 2008Date of Patent: June 5, 2012Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Yukihisa Kuriyama
-
Patent number: 8091395Abstract: A system, method and software arrangement are provided for generating press-formed parts having a more consistent quality based on improved determination of processing conditions. For example, an apparatus can be configured to compare actual performance values of material properties provided by a material property database with standard values, and to adjust forming conditions such as a forming speed and a blank-holder pressure in accordance with the compared result. A control arrangement can be provided to control a press-forming device using the adjusted forming conditions. Accordingly, it may be possible to reduce occurrences of defects such as cracks and wrinkles when press-forming materials, and to obtain products having consistent quality and substantially identical shapes.Type: GrantFiled: December 27, 2010Date of Patent: January 10, 2012Assignees: Nippon Steel Corporation, Arcelor FranceInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa, Takuya Kuwayama
-
Press-forming device, press-forming method, computer program/software arrangement and storage medium
Patent number: 8020418Abstract: Exemplary embodiments of a press-forming device, press-forming method, computer program/software arrangement and storage medium can be provided. The exemplary press-forming device can include a material characteristic input configured to input material characteristics. A state variable detector can be configured to measure a state variable comprising a metal mold distortion amount. A processing condition computer arrangement can be configured to determine from a first moment to a second moment at least one particular processing condition. Further, a processing condition controller can be configured to control the at least one processing condition from processing conditions.Type: GrantFiled: November 10, 2004Date of Patent: September 20, 2011Assignees: Nippon Steel Corporation, Arcelor FranceInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa, Takuya Kuwayama, Mitsuharu Yamagata -
Patent number: 8001819Abstract: The present invention was made with the object of eliminating the short pipe member when attaching a bolting nut to a hydroformed part, preventing an increase in the difficulty of hydroforming for attaching the nut, extending the nut length so as to enable sufficient strength at the time of bolting, and enabling application even to thin wall hydroformed parts and comprises inserting a metal pipe into a split mold having a pierce punch able to be moved perpendicular to an axis of the inserted metal pipe or in a slanted direction, having a front part narrower than a center part, and having around the front part a nut having an inside diameter larger than an outside diameter of the front part and smaller than an outside diameter of the center part; hydroforming it; then making the pierce punch advance to pierce part of the hydroformed part and pushing the nut by a center part arranged behind the nut and embedding the nut in the metal pipe.Type: GrantFiled: October 26, 2007Date of Patent: August 23, 2011Assignee: Nippon Steel CorporationInventors: Masaaki Mizumura, Koichi Sato, Yukihisa Kuriyama
-
PRESS-FORMING DEVICE, PRESS-FORMING METHOD, COMPUTER PROGRAM/SOFTWARE ARRANGEMENT AND STORAGE MEDIUM
Publication number: 20110166685Abstract: Exemplary embodiments of a press-forming device, press-forming method, computer program/software arrangement and storage medium can be provided. The exemplary press-forming device can include a material characteristic input configured to input material characteristics. A state variable detector can be configured to measure a state variable comprising a metal mold distortion amount. A processing condition computer arrangement can be configured to determine from a first moment to a second moment at least one particular processing condition. Further, a processing condition controller can be configured to control the at least one processing condition from processing conditions.Type: ApplicationFiled: March 17, 2011Publication date: July 7, 2011Applicants: Nippon Steel Corporation, ARCELOR, FRANCEInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa, Takuya Kuwayama, Mitsuharu Yamagata -
Publication number: 20110120203Abstract: A hydroforming apparatus and working method able to simply find a load path are proposed, which system and method use a mold in which contact sensors able to judge contact with a metal tube inside the mold are mounted at least at two different positions in the tube axial direction, perform a first step of axially pushing tube ends in a state with the internal pressure held at a constant value and stopping the progress of the axial pushing action when judging that among the contact sensors not yet in contact mounted at positions closest to the tube ends detect contact with the metal tube, next perform a second step of raising only the internal pressure while leaving the positions of the tube ends fixed and stopping the increase in the internal pressure when the contact sensor not yet in contact judges contact, next perform a third step of lowering the internal pressure to the value before raising it while leaving the positions of the tube ends fixed, and repeat said first step to third step until all of said cType: ApplicationFiled: June 30, 2009Publication date: May 26, 2011Inventors: Masaaki Mizumura, Koichi Sato, Manabu Wada, Yukihisa Kuriyama
-
Publication number: 20110097596Abstract: The invention has as its object to perform hydroforming so that no buckling or wrinkles remain at a hydroformed product with a long expanded region and comprises performing a first step of raising the internal pressure in a state with the metal tube fixed in position at the two ends or a state applying axial pushing actions of 10% or less of the total amount of axial pushing action, then applying axial pushing actions while holding the internal pressure at a constant pressure so as to expand the metal tube near the ends, then performing a second step of raising only the internal pressure without applying any axial pushing action so as to thereby expand a center of the metal tube, then performing a third step of lowering only the internal pressure to the value of the constant pressure without applying any axial pushing action, then repeating the first to third steps one or more times, then raising the internal pressure in the state not applying any axial pushing action or applying an axial pushing action of 10Type: ApplicationFiled: June 30, 2009Publication date: April 28, 2011Inventors: Masaaki Mizumura, Koichi Sato, Manabu Wada, Yukihisa Kuriyama
-
Publication number: 20110094279Abstract: A system, method and software arrangement are provided for generating press-formed parts having a more consistent quality based on improved determination of processing conditions. For example, an apparatus can be configured to compare actual performance values of material properties provided by a material property database with standard values, and to adjust forming conditions such as a forming speed and a blank-holder pressure in accordance with the compared result. A control arrangement can be provided to control a press-forming device using the adjusted forming conditions. Accordingly, it may be possible to reduce occurrences of defects such as cracks and wrinkles when press-forming materials, and to obtain products having consistent quality and substantially identical shapes.Type: ApplicationFiled: December 27, 2010Publication date: April 28, 2011Applicants: Nippon Steel Corporation, ARCELOR FranceInventors: Noriyuki Suzuki, Akihiro Uenishi, Yukihisa Kuriyama, Toshiyuki Niwa, Takuya Kuwayama