586 patents
Page 20 of 30
Utility
Spot welding method
3 Aug 20
Seiji Furusako, Yasunobu Miyazaki, Hitomi Nishibata, Yasuo Takahashi
Filed: 30 Apr 15
Utility
Method for producing H-shaped steel and H-shaped steel product
3 Aug 20
Hiroshi Yamashita
Filed: 9 Mar 16
Utility
Pressed article manufacturing method and press mold
3 Aug 20
A pressed article manufacturing method employing a press mold equipped with a punch and a die to manufacture a pressed article including a first wall, a second wall extending out from an end portion on at least one length direction side of the first wall toward a back face side of the first wall, and a third wall extending out from a leading end portion of the second wall toward a front face side of the second wall.
Takashi Miyagi, Misao Ogawa, Toshimitsu Aso, Yasuharu Tanaka, Keiichi Murakami
Filed: 25 Jun 15
Utility
Mechanical joining apparatus and mechanical joining method
27 Jul 20
Provided is a mechanical joining apparatus enabling stable riveting when joining metal sheets even when the sheets are large in deformation resistance, the apparatus comprising a punch and die, blank holder and power device, wherein the punch and die are arranged facing each other, the holder is configured by an electrode material able to push against and electrically heat the sheets by one end of the holder, the punch is comprised of a material able to drive in a rivet, the die is comprised of an electrode material able to support and electrically heat the sheets, and the power device is configured to start supply of current through the holder and die so as to raise the temperature of the sheets at the same time as the start of driving in of the rivet and to continue to supply current until the end of driving in of the rivet.
Seiji Furusako, Tohru Okada, Yasunobu Miyazaki, Fuminori Watanabe, Yoshiaki Nakazawa
Filed: 30 Jun 16
Utility
Spring steel
27 Jul 20
Spring steel includes: as a chemical composition, by mass %, C: 0.40% to 0.60%, Si: 0.90% to 2.50%, Mn: 0.20% to 1.20%, Cr: 0.15% to 2.00%, Ni: 0.10% to 1.00%, Ti: 0.030% to 0.100%, B: 0.0010% to 0.0060%, N: 0.0010% to 0.0070%, Cu: 0% to 0.50%, Mo: 0% to 1.00%, V: 0% to 0.50%, Nb: 0% to 0.10%, P: limited to less than 0.020%, S: limited to less than 0.020%, Al: limited to less than 0.050%, and a remainder including Fe and impurities, in a case where [Ti] represents a Ti content and [N] represents a N content by mass %, the chemical composition satisfies ([Ti]−3.43×[N])>0.03, and a total number density of a Ti carbide and a Ti carbonitride having a diameter of 5 nm to 100 nm is more than 50 piece/μm3.
Takahisa Suzuki, Manabu Kubota, Shuji Kozawa, Hirotsugu Miyamoto
Filed: 12 May 16
Utility
High-strength cold-rolled steel sheet, high-strength hot-dip galvanized steel sheet and high-strength galvannealed steel sheet
27 Jul 20
A high-strength cold-rolled steel sheet is provided that has a chemical composition that consists of, by mass %, C: 0.050 to 0.40%, Si: 0.01 to 3.0%, Mn: 1.0 to 5.0%, sol.
Takafumi Yokoyama, Hiroyuki Kawata, Riki Okamoto
Filed: 28 Jun 16
Utility
Laser welded joint and laser welding method
27 Jul 20
A laser welded joint excellent in joint strength preventing a bead from cracking and comprised of exactly the number of weld beads required for joint strength in overlay laser welding of steel sheets forming multiple ring-shaped weld beads, produced by a step of overlaying a plurality of metal sheets and forming a first weld bead and a step of firing a laser beam to successively form a further two or more weld beads at the outside of the first weld bead by laser irradiation, the surface hardness of the weld bead increasing from the inside bead to the outside bead.
Yasuaki Naito, Yasunobu Miyazaki
Filed: 16 Sep 15
Utility
Method and press-forming apparatus for manufacturing structural member for automotive body
20 Jul 20
A method for manufacturing the structural member (1), the method including: a first step in which the pad (15, 15A, 15B, 15C, 21) presses the forming material (16) against the punch (13) to raise a portion corresponding to a flange to be formed in ends of at least the gutter bottom (2) and the ridge (3a, 3b) in a direction opposite to the pressing direction, the pad (15, 15A, 15B, 15C, 21) bends an end of a portion to be formed into the ridge (3a, 3b) in the pressing direction and restrains at least a part of the end, and the punch (13) and the die (14) carry out press forming to form an intermediate product while a region other than an end in a portion to be formed into the gutter bottom (2) remains unrestrained.
Yasuhiro Ito, Ryuichi Nishimura, Kenichiro Otsuka, Yoshiaki Nakazawa
Filed: 9 Sep 14
Utility
Absorbing solution for separating and capturing carbon dioxide, and method for separating and capturing carbon dioxide in which same is used
20 Jul 20
Firoz Alam Chowdhury, Tsuguhiro Kato, Yoichi Matsuzaki, Masami Onoda
Filed: 17 Mar 16
Utility
Heat-treated steel material and method of manufacturing the same
20 Jul 20
A heat-treated steel material is provided having strength of 2.000 GPa or more.
Shinichiro Tabata, Kazuo Hikida, Nobusato Kojima
Filed: 25 May 15
Utility
Hot-rolled steel sheet, steel material, and method for producing hot-rolled steel sheet
20 Jul 20
Teruki Hayashida, Kazuya Ootsuka, Akifumi Sakakibara
Filed: 20 Apr 16
Utility
Titanium plate
20 Jul 20
A titanium plate is provided in which a Vickers hardness Hv0.025 at a load of 0.245 N at a surface is 150 or less, and an average length of the profile elements RSm is 80 μm or less and a maximum height Rz is less than 1.5 μm, RSm and Rz being as defined in JIS B 0601: 2013.
Koji Mitsuda, Kazuhiro Takahashi, Joe Ito, Hideto Seto, Hidenori Takebe
Filed: 17 Jan 16
Utility
Hot-dip galvanized steel sheet
20 Jul 20
A hot-dip galvanized steel sheet includes: a predetermined chemical composition; and a steel structure represented by: in terms of area ratio, polygonal ferrite: 10% or less; upper bainite: 20% or less; retained austenite: 5% or less; and martensite: 70% or more, in which: martensite having Fe carbides at a number density of 1×106/mm2 or more is contained by 50% or more, in terms of area ratio, with respect to the entire amount of martensite; and the steel structure has an average effective crystal grain diameter of 5.0 μm or less.
Takafumi Yokoyama, Kunio Hayashi, Masafumi Azuma, Eisaku Sakurada, Hiroyuki Kawata, Genki Abukawa
Filed: 14 Jul 16
Utility
Surface shape defect generating region estimating method, surface shape defect source region estimating method, surface shape defect generating region estimating device, surface shape defect source region estimating device, program, and recording medium
13 Jul 20
There is provided a surface shape defect generating region estimating method for estimating a generating region of a surface shape defect of a deformation-processed product obtained by performing deformation processing with respect to a workpiece, the method including: a first stress distribution obtaining process of obtaining first stress distribution σ(T1); a second stress distribution obtaining process of obtaining a second stress distribution σ(T2); a comparative stress distribution obtaining process of obtaining comparative stress distribution σ(T1, T2); a division comparative stress distribution obtaining process of obtaining division comparative stress distribution σDIV(T1, T2); and a surface shape defect generating region estimating process of estimating whether or not each of the divided regions DK is a generating region of the surface shape defect.
Takuya Kuwayama, Takashi Ariga
Filed: 21 Jan 16
Utility
Bulk magnet structure and bulk magnet system for NMR
13 Jul 20
The purpose of the present invention is to make it possible to use a wider uniform magnetic field space and to achieve an additional use mode for a bulk magnet structure.
Mitsuru Morita
Filed: 26 Jul 17
Utility
Press-forming apparatus and press-forming method
13 Jul 20
This press-forming apparatus is a press-forming apparatus for manufacturing a press-formed article from a workpiece sheet by moving at least one of a die and a punch so as to be close to each other in a press-forming direction, the press-formed article having a top portion, a first sidewall portion, and a second sidewall portion, the first sidewall portion and the second sidewall portion being connected to ridge portions formed on both edges of the top portion, wherein the die includes: a die slide; a first divisional die; a second divisional die; a second divisional die driving unit; a die pad; a die pad driving unit; an insert block; and an insert block driving unit.
Misao Ogawa, Masaru Itoh, Toshiya Suzuki, Hiroyuki Tanoue, Yasuharu Tanaka
Filed: 10 May 16
Utility
Method for producing H-shaped steel
13 Jul 20
The present invention relates to a method for producing H-shaped steel using a slab or the like having a rectangular cross-section as a material, for example.
Hiroshi Yamashita
Filed: 9 Mar 16
Utility
Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
13 Jul 20
A steel sheet for hot pressing includes: a specific chemical composition; and a steel structure comprising ferrite and cementite and represented, in area %: a total area ratio of bainite and martensite: 0% to 10%; and an area ratio of cementite: 1% or more; and a concentration of Mn in the cementite is 5% or more.
Koutarou Hayashi, Toshinobu Nishibata
Filed: 4 Feb 19
Utility
Alloyed hot-dip galvanized steel sheet and method of manufacturing the same
13 Jul 20
Provided is an alloyed hot-dip galvanized steel sheet including a base steel sheet, the base steel sheet containing a given amount of C, Si, Mn, and other elements.
Soshi Fujita, Shintaro Yamanaka
Filed: 7 Nov 18
Utility
Method of manufacturing flaring-processed metal pipe
6 Jul 20
A method of manufacturing a flaring-processed metal pipe from a hollow shell including a plurality of portions having different deformation resistances in a circumferential direction is provided, the method includes: among the plurality of portions, specifying a portion having a relatively small deformation resistance as a low deformation resistance section, and a portion having a relatively large deformation resistance as a high deformation resistance section; and press-fitting a pipe expansion punch into the hollow shell such that a thickness reduction rate of the low deformation resistance section is smaller than a thickness reduction rate of the high deformation resistance section.
Keinosuke Iguchi, Shohei Tamura, Masaaki Mizumura
Filed: 24 Dec 15