公开(公告)号：US11590547B2

公开(公告)日：2023-02-28

申请号：US16082894

申请日：2017-02-14

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Masaaki Mizumura ,  Keinosuke Iguchi ,  Hidehiro Arita

IPC分类号： B21C37/16 ,  B21D39/20 ,  B21J5/08 ,  B21C1/24 ,  B21C37/06 ,  B21K21/12

摘要： There is provided a method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe. The method of manufacturing a variable wall thickness steel pipe includes locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side in a state, where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; and performing ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed.

公开(公告)号：US20220178328A1

公开(公告)日：2022-06-09

申请号：US17676651

申请日：2022-02-21

申请人： KS KOLBENSCHMIDT US, INC.

发明人： David J. Boye ,  Bryan Quinn ,  Joseph Stojkov ,  Joshua Cota ,  Scott D. Bailey

IPC分类号： F02F3/16 ,  B21K1/18 ,  B21J5/08

摘要： A one-piece piston blank of near-net shape wherein the piston blank has a flange disposed opposite a skirt, the flange being spin-bendable to form a cooling channel with reduced preliminary removal of material relative to conventional forged piston blanks.

公开(公告)号：US10961613B2

公开(公告)日：2021-03-30

申请号：US15538407

申请日：2015-04-23

申请人： AGENCY FOR DEFENSE DEVELOPMENT

发明人： Seong Lee ,  Seongho Yang ,  Sungho Lee ,  Hyotae Jeong ,  Yuyeon Jo

IPC分类号： C22F1/18 ,  B21J5/08

摘要： A method for controlling the microstructure and texture of tantalum is described. The method includes a first forging step for performing upset forging and come-back forging on a tantalum billet multiple times in different directions, the upset forging performed to press two surfaces of the tantalum billet in order to make the two surfaces close to each other and the come-back forging performed to restore the tantalum billet to a rectangular prism shape; and a second forging step for performing wedge forging and come-back forging on the tantalum billet multiple times in different directions, the wedge forging performed to press two edges located in a diagonal direction of the tantalum billet and parallel to each other in order to make the two edges close to each other, and the come-back forging performed to restore the tantalum billet to the rectangular prism shape.

公开(公告)号：US10953486B2

公开(公告)日：2021-03-23

申请号：US16515776

申请日：2019-07-18

申请人： INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES

发明人： Dianzhong Li ,  Mingyue Sun ,  Bin Xu ,  Longzhe Zhao ,  Yiyi Li

IPC分类号： B23K15/00 ,  B21D39/00 ,  B08B7/00 ,  B21J5/00 ,  B23K15/06 ,  B08B1/00 ,  B21J1/02 ,  B21J1/04 ,  B21J1/06 ,  B21J5/08 ,  B23K20/14 ,  B23K37/00 ,  B23P13/00 ,  B23P15/00 ,  B08B3/02 ,  B08B1/02 ,  B23K20/26 ,  B23K31/02 ,  B65G47/92 ,  B65G61/00

摘要： A constructing-and-forging method for preparing homogenized forged pieces comprises: preparing preformed billets: cutting off a plurality of continuous casting billets, milling and smoothing surfaces of the billets to be welded, performing vacuum plasma cleaning operation to the surfaces to be welded, stacking the plurality of billets and sealing around the surfaces in a vacuum chamber by electron beam welding; forge-welding and homogenizing the preformed billets: heating the preformed billets to a certain temperature in a heating furnace and taking the heated preformed billets out of the heating furnace, forging the preformed billets by a hydraulic press, then using three-dimensional forging to disperse the welded surfaces such that composition, structure and inclusion of the interface areas are at the same level as those of the bodies of the billets. Cheap continuous casting billets are stacked and forge welded.

公开(公告)号：US10933462B2

公开(公告)日：2021-03-02

申请号：US15743827

申请日：2016-06-20

申请人： NTN CORPORATION ,  ENOMOTO MACHINE CO., LTD.

发明人： Yoshiya Mano ,  Shintaro Suzuki ,  Shunichirou Tsuboi ,  Akira Nagatake ,  Renji Natsume ,  Masazumi Kobayashi ,  Tatsuro Sugiyama ,  Yoshio Enomoto

IPC分类号： B21K1/06 ,  B21J5/08 ,  B21J13/02 ,  B21J13/03 ,  B21K1/76 ,  F16D3/227 ,  F16D1/027 ,  B21K1/14 ,  F16D3/223

摘要： A forging method for a shaft member includes preforming at least one of a plurality of enlarged diameter portions to obtain a semi-finished member, and forming a remainder of the enlarged diameter portions in the semi-finished member using a mold. The mold includes a punch, split dies, and a workpiece receiving member. The forming of the remainder of the enlarged diameter portions includes allowing the semi-finished member having the at least one of the enlarged diameter portions to be placed on the workpiece receiving member, cramping the semi-finished member in its radial direction by closing the split dies, and filling the semi-finished member into forming surfaces of the split dies by the pressure applied by the punch under the state in which the semi-finished member is cramped.

公开(公告)号：US20200318686A1

公开(公告)日：2020-10-08

申请号：US16303592

申请日：2017-04-24

申请人： NTN CORPORATION

发明人： Kohei MIZUTA ,  Chikara OHKI ,  Hiroki FUJIWARA

IPC分类号： F16C33/64 ,  B21D28/02 ,  B21D37/16 ,  B21D53/10 ,  B21D53/20 ,  B21J1/06 ,  B21J5/08 ,  C21D1/18 ,  C21D9/40 ,  F16C33/62

摘要： A steel material is heated and punched while tension is applied to the steel material (2) in at least one direction along a surface of the steel material between first and second portions of the steel material distant from each other with forming unit posed therebetween. The tension is applied to increase a distance between the first and second portions of the steel material by a length corresponding to an amount by which the distance between the first and second portions of the steel material thermally expands as the steel material is heated to the temperature in the step of heating and punching. The forming unit includes a first die for punching the steel material and a second die facing the first die, the first die or the second die having a forming surface having a concave curved surface.

公开(公告)号：US10751786B2

公开(公告)日：2020-08-25

申请号：US15313694

申请日：2015-05-26

申请人： TRW AUTOMOTIVE GMBH

发明人： Udo Zolnai ,  Friedrich Littau ,  Erwin Fauser

IPC分类号： B21J5/12 ,  B21J5/08 ,  B21D53/28 ,  B60R22/34

摘要： The invention describes a method of manufacturing a substantially plate-shaped frame member (10) of a belt retractor including locking teeth (18). A plate-shaped element (24) is provided, wherein said element is plastically reshaped in portions so that a portion (28) thickened into a main portion (12) of the plate-shaped element (24) is formed. Furthermore, locking teeth (18) are produced in the thickened portion (28) so that the locking teeth (18) have a larger thickness than the plate-shaped element (24) prior to reshaping. Moreover, a frame member (10) for a belt retractor is described.

公开(公告)号：US20200261961A1

公开(公告)日：2020-08-20

申请号：US16061405

申请日：2016-11-24

申请人： ZF Friedrichshafen AG

发明人： Peter Hoehne ,  Joerg Brockstieger

IPC分类号： B21D53/28 ,  B21J5/08

摘要： A method for manufacturing a gear toothing on a metallic workpiece and a tool device for calibration of a gear toothing inlet and/or a gear toothing outlet of a gear of the metallic workpiece. The method includes producing the gear toothing by forming manufacturing and performing a compression process to calibrate a gear toothing inlet and/or a gear toothing outlet of the gear toothing, wherein a gear tooth shape and a gear tooth length are adjusted during the compression process. The tool device includes a workpiece location for accommodating the workpiece, an axially movable die selectively engageable with the gear toothing, the die supporting the gear toothing and predefining the gear tooth shape to be adjusted on the gear toothing inlet and/or on the gear toothing outlet, and at least one axially movable compression ring which calibrates the gear toothing inlet and/or gear toothing outlet by a compression process.

公开(公告)号：US10661328B2

公开(公告)日：2020-05-26

申请号：US15111548

申请日：2015-03-12

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Yoshiyuki Kaseda ,  Yutaka Mikazuki

IPC分类号： B21D53/30 ,  B21K21/12 ,  B21K1/38 ,  B21J5/08 ,  B21J9/08 ,  B60B21/00 ,  B60B3/04 ,  B21D19/00

摘要： A production method of a wheel rim includes: a step of forming a cylindrical rim material into a rim shape; and a step of increasing a sheet thickness of at least one opening end edge of the rim material at least one of before and after the step of forming of the cylindrical rim material. In addition, in the step of increasing of the sheet thickness, in a state in which the opening end edge is inserted into an annular groove of a die provided with the annular groove which is wider than the sheet thickness of the opening end edge, a thickened portion is formed by exerting a compressive load in an axial direction of the rim material on the opening end edge.

公开(公告)号：US10309445B2

公开(公告)日：2019-06-04

申请号：US14829231

申请日：2015-08-18

申请人： ELLWOOD NATIONAL INVESTMENT CORP.

发明人： Brian C. Taylor ,  Manas P. Shirgaokar ,  Erik J. Soderstrom ,  Gerhard Epp

IPC分类号： B21J5/08 ,  F16C3/02 ,  H02K15/02 ,  H02K7/00 ,  B21J5/00 ,  B21K1/12

摘要： An embodiment includes a method for net shape forging of a large rotor shaft that includes a reduced central cylindrical section and integrally forged segments along the longitudinal length thereof. In an embodiment, the net shaped forging is produced by sequentially pressing the work piece such that a near net shaped forging of the machined work piece is produced, including upset geometries such as eccentric or concentric disks. This permits a reduction in waste material (e.g., due to the machining process) and improves the strength of the upset geometries. Other aspects are described and claimed.