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1. 发明公开

EP4364868A1 COIL SPRING, SUSPENSION DEVICE, AND METHOD FOR PRODUCING COIL SPRING 审中-公开
公开(公告)号：EP4364868A1
公开(公告)日：2024-05-08
申请号：EP22833060.1
申请日：2022-06-27
申请人： NHK Spring Co., Ltd.
发明人： OKADA, Hideki , YAMAUCHI, Yuichiro , TANAKA, Ryo , SUZUKI, Takeshi , SHIBAIRI, Kosuke
IPC分类号： B21F35/00 , C21D7/06 , C21D9/02 , C21D1/34 , C21D1/40 , B60G3/28 , F16F1/02 , F16F1/06 , F16F1/12
CPC分类号： B21F35/00 , B60G3/28 , C21D1/34 , C21D9/02 , F16F1/02 , F16F1/06 , F16F1/12 , C21D1/40 , C21D7/06
摘要： According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.

2. 发明公开

EP4276210A1 NON-ORIENTED ELECTRICAL STEEL SHEET 审中-公开
公开(公告)号：EP4276210A1
公开(公告)日：2023-11-15
申请号：EP22781217.9
申请日：2022-03-31
申请人： NIPPON STEEL CORPORATION
发明人： FUKUCHI, Minako , NATORI, Yoshiaki , MURAKAWA, Tesshu
IPC分类号： C22C38/00 , C21D8/12 , C22C38/60 , H01F1/147 , C21D7/06
摘要： A non-oriented electrical steel sheet of the present invention has a chemical composition capable of causing α-γ transformation, in which, in a case where an area ratio of grains having a crystal orientation of an {hkl} orientation (within a tolerance of 10°) when measured by EBSD is denoted as Ahld-uvw, A411-011 is 15.0% or more, and the non-oriented electrical steel sheet has an average grain size of 10.0 µm to 40.0 µm.

3. 发明公开

EP4197692A1 THREAD CUTTING TAP AND METHOD FOR TREATMENT OF A THREAD CUTTING TAP 审中-公开
公开(公告)号：EP4197692A1
公开(公告)日：2023-06-21
申请号：EP21214939.7
申请日：2021-12-15
申请人： AB Sandvik Coromant
发明人： CORONEL, Ernesto , GADDAM, Raghuveer , BLURTSYAN, David
IPC分类号： B23P15/52 , B23G1/00 , B24B3/18 , B24B31/00 , B24B31/02 , B24C1/10 , C21D7/06 , B24B19/04
摘要： The invention relates to treatment of a thread cutting tap (1) comprising a thread cutting portion (2) including a plurality of cutting lands (3) separated by flutes (4), wherein the thread cutting portion (2) comprises a chamfered section (5) extending from a front end (7) of the thread cutting tap (1) to a full profile section (6) extending from the chamfered section (5) towards a rear end (8) of the thread cutting tap (1). Each cutting land (3) comprises one or more thread cutting teeth (9) in the chamfered section (5) and a plurality of thread cutting teeth (9') in the full profile section (6), and each thread cutting tooth (9, 9') includes a primary cutting edge. The method comprises
- immersing at least the thread cutting portion (2) of the thread cutting tap (1) in a bed of granules and effectuating relative movement between the thread cutting portion and the granules for removing grinding burr and generating an edge rounding of a first magnitude at the primary cutting edge of each thread cutting tooth (9, 9'); and then
- exposing a subset of the thread cutting teeth (9, 9') to a dynamic plastic deformation treatment, the subset including at least all the thread cutting teeth (9) in the chamfered section (5), such as to generate an edge rounding of a second magnitude, greater than the first magnitude, at the primary cutting edge of each thread cutting tooth in the subset.
The invention also relates to a thread cutting tap produced by such method.

4. 发明授权

EP3577240B1 VERFAHREN ZUR HERSTELLUNG EINES FAHRZEUGRADES IN STAHLBLECHBAUWEISE 有权转让
公开(公告)号：EP3577240B1
公开(公告)日：2023-04-05
申请号：EP17702640.8
申请日：2017-02-02
发明人： PIERONEK, David
IPC分类号： C21D7/06 , B21D53/26 , B60B3/04 , C21D9/34

5. 发明公开

EP4144870A1 PEENING APPARATUS AND METHOD OF PEENING USING THE SAME 审中-公开
公开(公告)号：EP4144870A1
公开(公告)日：2023-03-08
申请号：EP22192872.4
申请日：2022-08-30
申请人： Industry-Academic Cooperation Foundation Dankook University
发明人： JUNG, SUNGHWAN
IPC分类号： C21D7/06 , C21D9/08 , B21D26/033 , B21D26/06
摘要： According to an aspect of the disclosure, there may be provided a peening apparatus for generating a compressive residual stress on a pipe member including at least one curved round portion and having a hollow inside formed therein in which a first fluid and a second fluid, which is in a gas phase, are accommodated, the apparatus including: a probe which is disposed such that it is submerged in the first fluid supplied to the hollow inside, and which is configured to apply a wave to the first fluid, wherein the first fluid and the second fluid have different acoustic impedances, so that the wave is totally reflected on a reflection surface where the first fluid and the second fluid are in contact, and forms a standing wave, and wherein a cavity generated and grown by the formed standing wave is exploded and emits a shock wave or microjet, which generates a compressive residual stress on the inner surface of the pipe member surrounding the hollow inside.

7. 发明授权

EP3241644B1 RESIDUAL STRESS EVALUATION METHOD 有权
公开(公告)号：EP3241644B1
公开(公告)日：2022-10-19
申请号：EP15881136.4
申请日：2015-04-21
发明人： OGAWA, Naoki , OCHI, Mayumi , HORI, Nobuyuki
IPC分类号： G01N3/40 , G01N3/32 , B24C1/10 , C21D7/06 , B23P9/04

8. 发明授权

EP3378963B1 STEEL COMPONENT, GEAR COMPONENT, AND METHOD FOR MANUFACTURING STEEL COMPONENT 有权转让
公开(公告)号：EP3378963B1
公开(公告)日：2022-07-13
申请号：EP17763304.7
申请日：2017-03-08
发明人： OBAYASHI, Koji , OKADA, Kazuaki , MATSUZAKA, Keisuke , SAKAKIBARA, Masashi , MIYANISHI, Kei , KOYAMA, Tatsuya , KUBOTA, Manabu
IPC分类号： C22C38/00 , C21D1/06 , C21D1/09 , C21D1/10 , C21D1/18 , C21D7/06 , C21D9/32 , C22C38/60

9. 发明公开

EP3995668A1 A METHOD FOR EXTENDING FATIGUE LIFE OF A TURBINE BLADE AFFECTED BY PITTING AND PRODUCT THEREOF 审中-公开
公开(公告)号：EP3995668A1
公开(公告)日：2022-05-11
申请号：EP21206204.6
申请日：2021-11-03
申请人： Fyzikální ústav AV CR, v.v.i. , Centrum Vyzkumu Rez S.R.O.
发明人： Brajer, Jan , Kaufman, Jan , Böhm, Marek , Hauschwitz, Petr , Strejcius, Josef , Spirit, Zbynek
IPC分类号： F01D5/28 , B23K26/356 , B23P6/00 , C21D7/06 , C21D10/00 , F01D5/00
摘要： The present invention relates to a method for extending a fatigue lifetime of a turbine blade (1) affected by pitting. A corrosion pit (2) is identified and treated by laser shock peening. In some embodiment, the blade (1) is treated by single shot LSP. In another embodiment, pattern strategy used for LSP is provided. The pattern of the single shock peening can be overlapping or nonoverlapping. In a preferred embodiment, the application of LSP is angle dependent.

10. 发明授权

EP3754290B1 VERFAHREN ZUR HERSTELLUNG EINES PANZERUNGSBAUTEILS FÜR KRAFTFAHRZEUGE 有权
公开(公告)号：EP3754290B1
公开(公告)日：2022-05-11
申请号：EP20178510.2
申请日：2020-06-05
发明人： Borchert, Ulrich , Holzweißig, Martin , Rüsing, Christian , Klasfauseweh, Udo
IPC分类号： F41H5/04 , F41H7/04 , B64C1/00 , C21D7/06 , C23C4/02

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