公开(公告)号：US20210199029A1

公开(公告)日：2021-07-01

申请号：US17057469

申请日：2019-04-18

Applicant: FEDERAL-MOGUL VALVETRAIN GMBH

Inventor： THORSTEN MATTHAIS ,  ANTONIUS WOLKING ,  GUIDO BAYARD

IPC: F01L3/14 ,  B21D22/16

Abstract: A method for producing a valve body of a hollow valve with optimised interior stem geometry includes a preform with a valve plate and a tubular wall surrounding a cavity. Flow forming the tubular wall over a flow-forming mandrel, which is inserted into the cavity to enlarge a length of the tubular wall. An interior area of the tubular wall is embossed with a structure either due to the fact that the flow-forming mandrel is a structuring mandrel having a surface structure, or alternatively, because the method includes a further step of reducing an outer diameter of the tubular wall by swaging or drawing and ironing over a structuring mandrel. Furthermore, a hollow valve is produced by this method.

公开(公告)号：US20200173318A1

公开(公告)日：2020-06-04

申请号：US16624996

申请日：2018-03-01

Applicant: FEDERAL-MOGUL VALVETRAIN GMBH

Inventor： THORSTEN MATTHIAS ,  ANTONIUS WOLKING ,  ANDREAS HEINEK ,  GUIDO BAYARD

IPC: F01L3/14 ,  F16K49/00 ,  B23P15/00

Abstract: A hollow valve having optimized interior stem geometry, whose valve stem has surface-enlarging structuring on an inner surface is provided. Also provided is a method for manufacturing a valve body of such a hollow valve, wherein the method comprises: providing a bowl-shaped semi-finished product having an annular wall that surrounds a cavity, and having a base section, followed by lengthening the wall with an inserted, structured mandrel, and lastly, reducing an outer diameter of the annular wall without a mandrel to obtain a predetermined valve stem outer diameter of a valve to be manufactured.

公开(公告)号：US20200156144A1

公开(公告)日：2020-05-21

申请号：US16625292

申请日：2018-03-06

Applicant: FEDERAL-MOGUL VALVETRAIN GMBH

Inventor： THORSTEN MATTHIAS ,  ANTONIUS WOLKING ,  GUIDO BAYARD ,  ANDREAS HEINEK

IPC: B21K1/22 ,  B21C23/20

Abstract: Disclosed is a method for the production of a valve body of a hollow chamber valve, said method comprising: providing a bowl-shaped semi-finished product having an annular wall, which surrounds a hollow chamber, and a bottom portion, followed by a lengthening of the wall and a final reducing of an outer diameter of the annular wall in order to obtain a predetermined valve shaft outside diameter of a valve that is to be produced. Further disclosed is a hollow chamber valve produced by means of said method.

公开(公告)号：US20200094323A1

公开(公告)日：2020-03-26

申请号：US16608294

申请日：2017-04-27

Applicant: FEDERAL-MOGUL VALVETRAIN GMBH

Inventor： ANDRE MAREAU ,  STEFAN KELLERMANN ,  ANTONIUS WOLKING ,  OLIVER SCHULZE ,  ANDREAS HEINEK ,  GUIDO BAYARD ,  DANIEL EISENRING ,  OLAF JOSEF ,  CARSTEN STRUEBBE ,  WOLF-DIETER STREICH

IPC: B22F3/15 ,  F01L3/20 ,  F16K3/24

Abstract: A method for manufacturing a poppet valve or mushroom valve includes providing a mixture of metal powder and a binder, filling and pressing said mixture in a mold, to obtain a green product, removing the binder from the green product, and thermally sintering the green product to a poppet valve blank, by hot isostatic pressing. A poppet valve is also provided that is manufactured with this method.

公开(公告)号：US20200039008A1

公开(公告)日：2020-02-06

申请号：US16485923

申请日：2017-10-26

Applicant: FEDERAL-MOGUL VALVETRAIN GMBH

Inventor： THORSTEN MATTHIAS ,  ANTONIUS WOLKING ,  GUIDO BAYARD

IPC: B23P15/00

Abstract: The invention relates to a method for producing poppet valves, the method including: cross-wedge rolling a preform (2), which has at least one disk portion (4) and a shaft portion, to produce a valve blank (10), wherein a diameter of the shaft portion (6) is reduced substantially to a shaft diameter of a shaft (16), and additionally a length of the shaft portion (6) is increased substantially to a length of the shaft (16) by means of a rolling-out process.