公开(公告)号：US11890667B2

公开(公告)日：2024-02-06

申请号：US17232276

申请日：2021-04-16

Applicant: FELSS Systems GmbH

Inventor： Werner Michi ,  Joerg Wachter ,  Dennis Beihofer ,  Philipp Grupp ,  Michael Marré

IPC: B21J9/06 ,  B21J9/20 ,  B21J5/08 ,  B21J5/02 ,  B21K1/06 ,  B21K21/12

CPC classification number: B21J9/06 ,  B21J5/025 ,  B21J5/08 ,  B21J9/20 ,  B21K1/063 ,  B21K21/12

Abstract: In a method for thickening a plastically deformable hollow body wall of a hollow body, with effective radial support of the unthickened hollow body wall on an outer supporting face of an outer mold and with effective radial support of the hollow body wall on an inner supporting face of an inner supporting body, the hollow body is acted on by a compressive force by two application members at application points by moving the application members towards one another in the axial direction with a compressing movement. The application points on the hollow body are distanced from one another in the axial direction. An expansion space of the outer mold is arranged between the application points. Due to the compressing movement of the application members, material of the hollow body wall between the application points is plasticised in the region of the expansion space of the outer mold, and plasticised material of the hollow body wall flows into the expansion space of the outer mold, thus thickening the hollow body wall.

公开(公告)号：US20220009302A1

公开(公告)日：2022-01-13

申请号：US16926213

申请日：2020-07-10

Applicant: Caterpillar Inc.

Inventor： Jeffrey Chow ,  Kurt S. Goslovich

IPC: B60G13/08 ,  F16F9/32 ,  F16F9/43 ,  F16F9/19 ,  F16F9/18 ,  F16F9/34 ,  F16F9/36 ,  B60G13/06 ,  F16F9/06 ,  B60G17/08 ,  F16F9/02 ,  B21K1/06

Abstract: In accordance with one aspect of the present disclosure, a suspension strut for use on a work machine is provided. The suspension strut may have a forged one piece cylindrical inner housing that includes a hollow rod which forms a circumferential piston at an open end and a lower clevis at a closed end of the hollow rod. The suspension strut may further have a forged one piece cylindrical outer housing that includes a hollow barrel having an interior and an exterior surface, a closed end that forms an upper clevis, an open end, and a port on an outside surface of the hollow barrel. Further, the inner and outer housing may be coupled by a disk shaped end cap attached to the open end of the hollow barrel having an inner diameter that is slideably engaged with an outer surface of hollow rod.

公开(公告)号：US20210346941A1

公开(公告)日：2021-11-11

申请号：US17283016

申请日：2020-06-05

Applicant: CHANGSHU SYNERGY AUTOMOBILE PARTS CO., LTD

Inventor： Yasuhiro KUWAHARA

IPC: B21K1/06 ,  B21J5/02 ,  B21J5/12

Abstract: A novel hollow shaft manufacturing method includes the steps of hollow cold-rolling of seamless steel pipe, cutting, annealing and surface treatment, forming by forging, precision machining, and heat treatment. The present invention uses a new process instead of the traditional process. The forging process using high-strength cold-rolled seamless steel pipes has fewer steps than using bar stock: saving three forging passes, one annealing pass and one surface treatment pass, hence saving about ½ in time and cost, shortening the cycle, reducing costs, reducing energy consumption and reducing the three wastes, increasing the stock utilization rate to about 68%, and reducing the inter-process cost calculated by weight. For the same products, using this process can shorten the production cycle.

公开(公告)号：US20210252584A1

公开(公告)日：2021-08-19

申请号：US16972712

申请日：2018-11-29

Applicant: ILJIN STEEL CORPORATION

Inventor： Sung Ha KIM ,  Eui Hyouk HWANG ,  Young June PARK

IPC: B21J5/08 ,  B21J1/06 ,  B21K1/06 ,  B23B5/08

Abstract: Provided are a hollow drive shaft using an upsetting method and a method of manufacturing the same, in which hot forging and upsetting processes are applied to both ends of a workpiece so that an outer diameter at both ends of the workpiece is greater than an outer diameter of a middle part of the workpiece, thereby reducing a weight of the drive shaft and enabling the drive shaft to transmit higher driving power. According to the present invention, the upsetting process is applied during the hot forging process to manufacture the hollow drive shaft, portions to be substantially processed are limited to portions at both ends of the workpiece, and the number of upsetting processes is limited to a minimum number (2 or the like), such that initial investment costs and manufacturing costs are low because the number of processes is small.

公开(公告)号：US20210229160A1

公开(公告)日：2021-07-29

申请号：US17232276

申请日：2021-04-16

Applicant: FELSS Systems GmbH

Inventor： Werner MICHI ,  Joerg WACHTER ,  Dennis BEIHOFER ,  Philipp GRUPP ,  Michael MARRÉ

IPC: B21J9/06 ,  B21J9/20 ,  B21J5/08 ,  B21J5/02 ,  B21K1/06 ,  B21K21/12

Abstract: In a method for thickening a plastically deformable hollow body wall of a hollow body, with effective radial support of the unthickened hollow body wall on an outer supporting face of an outer mold and with effective radial support of the hollow body wall on an inner supporting face of an inner supporting body, the hollow body is acted on by a compressive force by two application members at application points by moving the application members towards one another in the axial direction with a compressing movement. The application points on the hollow body are distanced from one another in the axial direction. An expansion space of the outer mold is arranged between the application points. Due to the compressing movement of the application members, material of the hollow body wall between the application points is plasticised in the region of the expansion space of the outer mold, and plasticised material of the hollow body wall flows into the expansion space of the outer mold, thus thickening the hollow body wall.

公开(公告)号：US11065673B2

公开(公告)日：2021-07-20

申请号：US15565312

申请日：2016-04-11

Applicant: TECNIFORJA—FORJAGEM E ESTAMPAGEM DE PEÇAS TÉCNICAS, LDA

Inventor： Artur José Pereira Teixeira Mendes

IPC: B21K21/12 ,  B21J1/06 ,  C21D1/84 ,  C21D7/13 ,  C21D9/08 ,  C21D1/28 ,  B21J5/08 ,  B21J5/02 ,  B21K1/76 ,  B21K1/06

Abstract: The present disclosure relates to a steel forging process, in particular a hot steel forging process in horizontal press of a metal tube, preferably a cylindrical steel tube.

公开(公告)号：US11007564B2

公开(公告)日：2021-05-18

申请号：US15860878

申请日：2018-01-03

Applicant: FELSS SYSTEMS GMBH

Inventor： Werner Michi ,  Joerg Wachter ,  Dennis Beihofer ,  Philipp Grupp ,  Michael Marre

IPC: B21J9/06 ,  B21J9/20 ,  B21J5/08 ,  B21J5/02 ,  B21K1/06 ,  B21K21/12

Abstract: A method for thickening a plastically deformable hollow body wall of a hollow body includes the steps of arranging the hollow body in an outer mold, arranging an inner supporting body inside the hollow body, applying a compressive force to the hollow body wall by means of two application members moving towards one another in an axial direction with a continuous compressing movement, and performing an axial relative movement of the application members performing the continuous compressing movement on the one hand and of the outer mold on the other hand. Due to the compressing movement of the application members, material of the hollow body wall is plasticized and flows into an expansion space of the outer mold, an axial extent of the expansion space increasing due to the axial relative movement of the application members performing the continuous compressing movement and of the outer mold.

公开(公告)号：US10948008B2

公开(公告)日：2021-03-16

申请号：US15519751

申请日：2015-07-31

Applicant: ThyssenKrupp Presta AG ,  ThyssenKrupp AG

Inventor： Michael Walser

IPC: B21D17/04 ,  F16C3/03 ,  F16D3/06 ,  B21D15/02 ,  B21H1/20 ,  B21H7/18 ,  B62D1/16 ,  B21K1/06 ,  F16D3/40

Abstract: A method for producing a profiled hollow shaft for a telescopic steering shaft of a motor vehicle may involve providing a hollow shaft to be processed, a profile mandrel, and a roller head comprising at least one roller. The method may further involve introducing the profile mandrel into the hollow shaft in order to produce a groove in the hollow shaft. The method may also involve moving the profile mandrel and the hollow shaft together relative to the roller head, wherein movement of the profile mandrel and the hollow shaft relative to the roller head is performed exclusively in a direction of a longitudinal axis of the hollow shaft in order to form a groove.

公开(公告)号：US20200016650A1

公开(公告)日：2020-01-16

申请号：US16335283

申请日：2017-08-31

Applicant: NTN CORPORATION

Inventor： Jun HIRADE ,  Masashi YAMAGOU ,  Mikihisa FUJIWARA ,  Tetsuya KURIMURA

IPC: B21K1/06 ,  B23B1/00

Abstract: A shaft member for a fluid bearing device includes, on an outer peripheral surface thereof, two bearing surfaces (31 and 32) separated from each other in an axial direction, and a middle relief portion (33) formed between the bearing surfaces (31 and 32) and having a diameter smaller than a diameter of the bearing surfaces. The middle relief portion (33) includes a cylindrical surface portion (331) having a ground surface, and stepped portions (332) arranged on both axial sides of the cylindrical surface portion and having a diameter difference from the cylindrical surface portion.

公开(公告)号：US10473144B2

公开(公告)日：2019-11-12

申请号：US14275498

申请日：2014-05-12

Applicant: AESCULAP AG

Inventor： Bernhard Kupferschmid

IPC: F16C1/20 ,  B21K1/06 ,  A61B17/29 ,  F16C1/00 ,  A61B17/00

Abstract: The disclosed embodiments describe a method for producing a bent tubular shaft for a tubular shaft instrument as well as a tubular shaft produced in such manner as well as a tubular shaft instrument with such a bent tubular shaft. The tubular shaft is produced by providing a hollow shaft component and an actuating rod. The actuating rod in this case has at least one bending area in which flexible segments and support segments alternate. The at least one bending area of the actuating rod is provided with a friction-reducing layer before it is inserted into the shaft component in order to create a tubular shaft. The tubular shaft is then bent in an area that corresponds to the at least one bending area of the actuating rod.