专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

3. 发明公开

EP2423840A1 MOLDING SIMULATION METHOD, MOLDING SIMULATION DEVICE, MOLDING SIMULATION PROGRAM, AND RECORDING MEDIUM THEREFOR 无效转让
标题翻译：自由裁量权，公民权利和人民权利公约，澳大利亚联邦公民权利和政治权利国际公约
公开(公告)号：EP2423840A1
公开(公告)日：2012-02-29
申请号：EP10766831.1
申请日：2010-04-19
申请人： Nippon Steel Corporation
发明人： SUZUKI, Noriyuki , YONEMURA, Shigeru , UENISHI, Akihiro , KUWAYAMA, Takuya
IPC分类号： G06F17/50 , B21D22/00
CPC分类号： B21D22/20 , G06F17/5018 , G06F2217/41 , G06F2217/42 , Y02T10/82
摘要： The present invention provides a press forming simulation method using a finite element method for a sheet metal, in which a deformation state of a pressing tool is represented with high accuracy by superimposing at least one natural mode, for the surface shape of the pressing tool, in a no-load state.
摘要翻译：本发明提供一种使用钣金的有限元法的冲压成形模拟方法，其中通过叠加至少一种自然模式，对于加压工具的表面形状，以高精度表示按压工具的变形状态，处于空载状态。

4. 发明公开

EP4186987A1 STEEL SHEET AND METHOD FOR MANUFACTURING SAME 审中-实审
公开(公告)号：EP4186987A1
公开(公告)日：2023-05-31
申请号：EP21880232.0
申请日：2021-10-15
申请人： NIPPON STEEL CORPORATION
发明人： KUWAYAMA, Takuya , HAYASHI, Kunio , YOKOYAMA, Takafumi
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/60 , B22D11/00
摘要： This steel sheet has a predetermined chemical composition, in which a microstructure at a 1/4 depth position of a sheet thickness from a surface of the steel sheet contains, by volume fraction, ferrite: 0% to 50%, residual austenite: 6% to 30%, bainite: 5% to 60%, tempered martensite: 5% to 50%, fresh martensite: 0% to 10%, and pearlite: 0% to 5%, at the 1/4 depth position of the sheet thickness from the surface, a number proportion of the residual austenite having an aspect ratio of 2.0 or more to an entire residual austenite is 50% or more, and a number density of inclusions and precipitates having a grain size of 1 µm or more is 30 /mm 2 or less, and at a 1/20 depth position of the sheet thickness from the surface, an average interval between Mn-concentrated portions in a direction perpendicular to a rolling direction is 300 µm or less, and a standard deviation of Mn concentrations in the residual austenite is 0.40% or less.

5. 发明公开

EP2345488A1 METALLIC PRESS-FORMED PIECE CRACK DETERMINING METHOD, APPARATUS, PROGRAM AND RECORDING MEDIUM 有权转让
标题翻译： VERFAHREN，VORRICHTUNG，PROGRAMM UND AUFZEICHNUNGSMEDIUM ZUR RISSERKENNUNG BEI PRESSGEFORMTEN METALLTEILEN
公开(公告)号：EP2345488A1
公开(公告)日：2011-07-20
申请号：EP09819196.8
申请日：2009-10-06
申请人： Nippon Steel Corporation
发明人： KUWAYAMA, Takuya , SETO, Atsushi , SUZUKI, Noriyuki
IPC分类号： B21D22/00 , B21D22/20 , B21D37/00
CPC分类号： B21D22/22 , G01N3/28 , G01N2203/0051 , G01N2203/0062
摘要： In the process of target stamping for fracture judgment, an acquisition unit 101 acquires, as target data for fracture judgment, strain of a target die to be measured over the duration from the start time of stamping measured by strain measuring units 8 to the finishing time of stamping, and also acquires production conditions typically by measurement. An extraction unit 102 extracts the reference data, which gives the minimum total of differences between the production conditions of the reference data extracted from the storage unit 104 and the production conditions of the target data for fracture judgment, as the comparative data. A judging unit 103 compares strain in the comparative data extracted by the extraction unit 102 and strain in the target data for fracture judgment, and judges occurrence of a crack in a stamped product, if the maximum value of the difference is not smaller than a predetermined value. By virtue of this configuration, cracks possibly produced in the process of stamping of various metal materials such as those of iron-base, non-iron-base and stacked products may precisely be judged.
摘要翻译：在用于断裂判断的目标冲压的过程中，获取单元101从由应变测量单元8测量的冲压开始时间到最后时间获取作为断裂判断的目标数据的待测量目标模具的应变，的冲压，并且通常通过测量获得生产条件。提取单元102提取参考数据，该参考数据给出从存储单元104提取的参考数据的生产条件与用于断裂判断的目标数据的生产条件之间的最小差异总和作为比较数据。判断单元103比较由提取单元102提取的比较数据中的应变和用于断裂判断的目标数据中的应变，并且如果差的最大值不小于预定值，则判断冲压产品中的裂纹发生值。由于这种构造，可以精确地判断在铁基，非铁基和堆叠产品的各种金属材料的冲压过程中可能产生的裂纹。

7. 发明授权

EP2153916B1 THIN PLATE PRESS MOLDING DEVICE AND THIN PLATE PRESS MOLDING METHOD 有权转让
标题翻译：薄板冲压成型装置和薄板冲压成型方法
公开(公告)号：EP2153916B1
公开(公告)日：2012-12-05
申请号：EP08752836.0
申请日：2008-05-09
申请人： Nippon Steel Corporation
发明人： KUWAYAMA, Takuya , SUZUKI, Noriyuki
IPC分类号： B21D37/00 , B21D24/00 , B30B15/28
CPC分类号： B21D37/00 , B21D22/02 , B21D22/20 , G01L5/0076

8. 发明公开

EP3943204A1 PRESS FORMING METHOD 审中-公开
公开(公告)号：EP3943204A1
公开(公告)日：2022-01-26
申请号：EP21191036.9
申请日：2012-05-16
申请人： Nippon Steel Corporation
发明人： YONEMURA, Shigeru , UENISHI, Akihiro , TOYOKAWA, Shin , KUWAYAMA, Takuya , ARIGA, Takashi
IPC分类号： B21D22/26 , B21D53/88 , B21D22/30 , B21D35/00
摘要： The present invention relates to a press forming method characterized by comprising: a first step of producing an intermediate molding (100B) by forming one or more embossments (B) in a predetermined part of a sheet metal (100), a second step of press forming the intermediate molding (100B) between a die (2) and a punch (1), while pushing the punch (1) into the die (2) by means of a relative motion of the die (2) and the punch (1), so as to shape the intermediate molding (100B) into a final shape (100A), and flattening and thickening the part having the embossments (B) provided therein, to thereby work-harden the part, wherein the final shape (100A) has a hat-like cross sectional shape, the hat-like cross sectional shape having a pair of flanges (100a) and vertical walls (100b) and ridges (100d) and a ceiling (100c).

9. 发明公开

EP2153916A1 THIN PLATE PRESS MOLDING DEVICE AND THIN PLATE PRESS MOLDING METHOD 有权转让
标题翻译：薄板冲压成型装置和薄板冲压成型方法
公开(公告)号：EP2153916A1
公开(公告)日：2010-02-17
申请号：EP08752836.0
申请日：2008-05-09
申请人： Nippon Steel Corporation
发明人： KUWAYAMA, Takuya , SUZUKI, Noriyuki
IPC分类号： B21D37/00 , B21D24/00 , B30B15/28
CPC分类号： B21D37/00 , B21D22/02 , B21D22/20 , G01L5/0076
摘要： A press-forming device includes a punch and a die, as a mold to be measured, and a strain measurement means arranged within the mold and measuring a strain amount generated by press-forming. The strain measurement means is positioned at the press-direction side relative to a radius end of a die shoulder on the material flow-out side when the mold is positioned at a lower dead point of press-forming. The strain measurement means is preferably positioned within a region defined by a surface which is away from the center of curvature of a curved surface of the mold by the distance ten times R, where R is a curvature radius of the curved surface.
摘要翻译：冲压成形装置包括作为要测量的模具的冲头和模具以及布置在模具内并测量通过冲压成形产生的应变量的应变测量装置。当模具定位在压制成形的下死点时，应变测量装置相对于材料流出侧的模肩的半径端位于压制方向侧。应变测量装置优选位于由远离模具弯曲表面的曲率中心10倍的距离R的表面限定的区域内，其中R是曲面的曲率半径。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式