# US 2019/0168822 A1 · Structural member and method of production of same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168822 A1 - Document ID: US20190168822A1 - Status: Published application - Kind: A1 - Application number: 16/097,792 - Filed: 2017-05-09 - Published: 2019-06-06 - Earliest claimed: 2016-05-09 - Assignees: Nippon Steel & Sumitomo Metal Corporation - Applicants: Nippon Steel & Sumitomo Metal Corporation - Inventors: Masahiro SAITO - Web page: https://patentgrep.com/patent/US20190168822A1 ## CPC - B62D 25/2036: {the subunits being side panels, sills or pillars (B62D21/157 takes precedence)} - B21D 22/02: Stamping using rigid devices or tools - B21D 22/26: for making peculiarly, e.g. irregularly, shaped articles - B21D 24/00: Special deep-drawing arrangements in, or in connection with, presses - B21D 35/005: {characterized by the material of the blank or the workpiece (B21D26/053 takes precedence)} - B21D 47/01: beams or pillars - B21D 53/88: other parts for vehicles, e.g. cowlings, mudguards - B62D 25/04: Door pillars {; windshield pillars} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) ## Abstract A structural member of an integral shaped article using steel sheet having a tensile strength of 590 MPa or more improved in formability, produced using a die or blank holder provided with a space at least at part of a position contacting a blank at the time of pressing it. The structural member comprises a top sheet part including at least one recessed part at an outside edge part in a plan view, a first vertical wall part extending bent from a part or all of an outside edge part including the recessed part in the top sheet part, a first flange part extending bent from an edge of the first vertical wall part at an opposite side to the top sheet part, and a second vertical wall part extending bent from an edge of the top sheet part different from the outside edge part including the recessed part, and at least one projecting part on the top sheet part, the first vertical wall part, or the first flange part. ## Claims ### Claim 1 A structural member of an integral shaped article using a steel sheet having a tensile strength of 590 MPa or more, the structural member comprising: a top sheet part including at least one recessed part at an outside edge part in a plan view; a first vertical wall part extending bent from a part or all of the outside edge part including the recessed part in the top sheet part; a first flange part extending bent from an edge of the first vertical wall part at an opposite side to the top sheet part; a second vertical wall part extending bent from an edge of the top sheet part different from the outside edge part including the recessed part; and at least one projecting part on the top sheet part, the first vertical wall part, or the first flange part. ### Claim 2 (depends on 1) The structural member according to claim 1 wherein the structural member is an integral shaped article using a steel sheet having a tensile strength of 980 MPa or more. ### Claim 3 (depends on 1) The structural member according to claim 1 wherein a sheet thickness of the structural member is 0.6 to 1.8 mm. ### Claim 4 (depends on 1) The structural member according to claim 1 wherein a radius of curvature R of the recessed part and a height “h” of the first vertical wall part satisfy 0.6≤R/h≤3.0. ### Claim 5 (depends on 1) The structural member according to claim 1, further comprising a second flange part extending bent from an edge of the second vertical wall part at an opposite side to the top sheet part. ### Claim 6 (depends on 1) A method of production of the structural member according to claim 1, the method of production comprising the steps of: placing a flat sheet blank between a die and a blank holder, and foil ling the second vertical wall part by moving the blank relative to a punch to press and deform the blank; and placing the blank in which the second vertical wall part is formed between a die and a blank holder, and forming a first vertical wall part and a first flange part by moving the blank relative to a punch to press and deform the blank, wherein the die or the blank holder used in the step of forming the second vertical wall part is provided with a space in at least one part of a position contacting the blank at the time of the pressing. ### Claim 7 (depends on 6) The method of production of the structural member according to claim 6 wherein the space is provided to include a position at which the most amount of material flow when forming the second vertical wall part. ### Claim 8 (depends on 6) The method of production of the structural member according to claim 6 further comprising the steps of placing, between the die and the blank holder, the blank in which the first vertical wall part, the first flange part and the second vertical wall part are formed, and adjusting a shape of the second vertical wall part by moving the blank relative to a punch to press and deform the blank. ### Claim 9 (depends on 5) A method of production of the structural member according to claim 5, the method of production comprising the steps of: placing a flat sheet blank between a die and a blank holder, and forming the second vertical wall part and the second flange part by moving the blank relative to a punch to press and deform the blank; and placing the blank in which the second vertical wall part is formed between a die and a blank holder, and forming the first vertical wall part and the first flange part by moving the blank relative to a punch to press and deform the blank, wherein the die or the blank holder used in the step of forming the second vertical wall part and second flange part is provided with a space in at least one part of a position contacting the blank at the time of the pressing. ### Claim 10 (depends on 9) The method of production of the structural member according to claim 9 wherein the space is provided to include a position at which the most amount of material flow when forming the second vertical wall part and the second flange part. ### Claim 11 (depends on 9) The method of production of the structural member according to claim 9 further comprising the steps of placing the blank in which the first vertical wall part, the first flange part, the second vertical wall part and the second flange part are formed between a die and a blank holder, and adjusting a shape of the second vertical wall part and the second flange part by moving relative to a punch to press and deform the blank. ### Claim 12 (depends on 2) The structural member according to claim 2 wherein a sheet thickness of the structural member is 0.6 to 1.8 mm. ### Claim 13 (depends on 2) The structural member according to claim 2 wherein a radius of curvature R of the recessed part and a height “h” of the first vertical wall part satisfy 0.6≤R/h≤3.0. ### Claim 14 (depends on 2) The structural member according to claim 2, further comprising a second flange part extending bent from an edge of the second vertical wall part at an opposite side to the top sheet part. ### Claim 15 (depends on 3) The structural member according to claim 3 wherein a radius of curvature R of the recessed part and a height “h” of the first vertical wall part satisfy 0.6≤R/h≤3.0. ### Claim 16 (depends on 12) The structural member according to claim 12 wherein a radius of curvature R of the recessed part and a height “h” of the first vertical wall part satisfy 0.6≤R/h≤3.0. ### Claim 17 (depends on 3) The structural member according to claim 3, further comprising a second flange part extending bent from an edge of the second vertical wall part at an opposite side to the top sheet part. ### Claim 18 (depends on 12) The structural member according to claim 12, further comprising a second flange part extending bent from an edge of the second vertical wall part at an opposite side to the top sheet part. ### Claim 19 (depends on 7) The method of production of the structural member according to claim 7 further comprising the steps of placing, between the die and the blank holder, the blank in which the first vertical wall part, the first flange part and the second vertical wall part are formed, and adjusting a shape of the second vertical wall part by moving the blank relative to a punch to press and deform the blank. ### Claim 20 (depends on 10) The method of production of the structural member according to claim 10 further comprising the steps of placing the blank in which the first vertical wall part, the first flange part, the second vertical wall part and the second flange part are formed between a die and a blank holder, and adjusting a shape of the second vertical wall part and the second flange part by moving relative to a punch to press and deform the blank.