EP3583302A1 - Procédé de fabrication de soupapes à espace creux - Google Patents

Procédé de fabrication de soupapes à espace creux

Info

Publication number
EP3583302A1
EP3583302A1 EP18710811.3A EP18710811A EP3583302A1 EP 3583302 A1 EP3583302 A1 EP 3583302A1 EP 18710811 A EP18710811 A EP 18710811A EP 3583302 A1 EP3583302 A1 EP 3583302A1
Authority
EP
European Patent Office
Prior art keywords
annular wall
valve
cavity
cup
outer diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18710811.3A
Other languages
German (de)
English (en)
Other versions
EP3583302B1 (fr
Inventor
Thorsten MATTHIAS
Antonius Wolking
Guido Bayard
Andreas Heinek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Mogul Valvetrain GmbH
Original Assignee
Federal Mogul Valvetrain GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Federal Mogul Valvetrain GmbH filed Critical Federal Mogul Valvetrain GmbH
Priority to PL18710811T priority Critical patent/PL3583302T3/pl
Publication of EP3583302A1 publication Critical patent/EP3583302A1/fr
Application granted granted Critical
Publication of EP3583302B1 publication Critical patent/EP3583302B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/12—Cooling of valves
    • F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/20—Making uncoated products by backward extrusion
    • B21C23/205—Making products of generally elongated shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the present invention relates to a method of manufacturing cavity valves for internal combustion engines and cavity valves made therewith.
  • Cavity valves are usually made by a combination of various methods, such as e.g. Forging, turning and welding. In particular, the turning or milling of the cavity is costly. Also weld spots should be avoided on the plate surface or other operational critical points. Another disadvantage of known methods is that often a large number of process steps is necessary.
  • US 6006713 A relates to a cavity valve made by closing a hollow blank by means of welding.
  • Object of the present invention is therefore to provide a manufacturing method for cavity valves or a valve body for cavity valves, which does not have the disadvantages mentioned and at the same time a high productivity and good Has material utilization.
  • the object is achieved by a method for producing a valve body of a cavity valve, comprising the steps of providing a cup-shaped semifinished product, the semifinished product having an annular wall which surrounds a cylindrical cavity of the semifinished product and a bottom portion; Forming a valve head from the bottom portion; Lengths of the annular wall in an axial direction by forming, wherein a mandrel is inserted into the cavity during the forming; Reducing an outer diameter of the annular wall by swaging to obtain a valve stem of the finished valve body having a predetermined outer diameter.
  • the provision of the cup-shaped semifinished product may comprise providing an at least partially cylindrical blank and forming the cup-shaped semifinished product from the blank.
  • the shaping of the cup-shaped semifinished product can take place by a hot-forming method, in particular by cup-backward extrusion or forging.
  • the molding of the valve head may be by a hot forming process, in particular by cup backward extrusion or forging.
  • the lengths of the annular side wall may be made by swaging with a mandrel or ironing via a mandrel.
  • a plurality of mandrels of different diameters may be used in the length of the annular wall.
  • the lengths of the annular wall may decrease the diameter of successively used mandrels.
  • reducing the outer diameter of the annular wall may include a plurality of rotary kneading substeps.
  • reducing the outer diameter of the annular wall may occur without a mandrel inserted.
  • the method may further include charging a cooling medium, particularly sodium, into the cavity and closing the valve stem.
  • a cooling medium particularly sodium
  • FIGS. 1A-1F show various intermediate steps of the production according to the invention of a valve body of a cavity valve (shown in FIG. 1F) from a blank (shown in FIG. 1A).
  • FIGS. 1A to 1F show, in sectional views, various intermediate stages of the production method according to the invention.
  • a blank 2 is made of a valve steel known to the person skilled in the art.
  • the blank has an at least partially cylindrical shape, preferably a circular cylindrical shape, corresponding to the circular shape of the valve body or valve to be produced.
  • the blank 2 is formed into a cup-shaped semifinished product 4 or workpiece shown in FIG. 1B.
  • the semifinished product in the form of a cup comprises a bottom portion 10, from which a valve head (or valve disk) 12 is later formed, and an annular wall 6, which surrounds a cylindrical, preferably circular cylindrical, cavity 8 of the cup-shaped semifinished product 4 and from the later Valve stem 14 is formed.
  • material may flow between the bottom section 10 and the annular wall 6 during the subsequent forming steps.
  • the cup-shaped semi-finished product 4 is provided directly according to the invention; The method then starts with providing the cup-shaped semifinished product 4 illustrated in FIG. 1B.
  • valve head 12 is formed from the bottom section 10.
  • the workpiece thus obtained is shown in Fig. IC.
  • Both the forming of the blank 2 into a cup-shaped workpiece 4 and the molding of the valve head 12 from the bottom portion 10 is preferably carried out by a hot forming process; more preferably, cup reverse extrusion or forging is used. In cup backward extrusion, a punch is pressed into the blank 2 to form the cavity 8.
  • an axial length of the annular wall 6 is increased.
  • 'Axial' here refers to the longitudinal direction defined by the shaft, ie to the axis of the annular wall; 'Radial' is correspondingly a direction orthogonal to the axial direction.
  • a mandrel (not shown) is inserted into the cavity, so that a flow of the material is prevented in the radial direction and the material flow takes place mainly in the axial direction.
  • Inner diameter and wall thickness of the annular wall 6 can be adjusted to a desired value. Further, this forming step may consist of several sub-steps, in which optionally several mandrels with the row be used after decreasing diameters.
  • FIGS. 1D and IE The semifinished shapes thus achieved are illustrated by way of example in FIGS. 1D and IE, where first a larger diameter mandrel is used to obtain the semifinished state shown in FIG. 1D and subsequently a mandrel having a smaller diameter is used to obtain the state shown in Fig. IE.
  • a larger diameter mandrel is used to obtain the semifinished state shown in FIG. 1D
  • a mandrel having a smaller diameter is used to obtain the state shown in Fig. IE.
  • the use of more than two thorns with different diameters is possible.
  • this length or this elongation is preferably rotary swaging with mandrel or Abstreckgleit » over a mandrel for use.
  • the outer diameter of the annular wall 6 is reduced by swaging to obtain a finished valve body 16 whose valve stem 12 has a predetermined outer diameter D, i. has a desired target diameter; see. Fig. 1F.
  • This forming step is preferably carried out without inserted mandrel, so that the diameter can be effectively reduced.
  • This step in addition to a reduction in the outer diameter, also leads to a further elongation of the annular wall 6 and, without a mandrel, to an increase in the wall thickness of the annular wall.
  • the wall thickness would therefore possibly be set slightly smaller in the preceding elongation step, in order to obtain a specific wall thickness, taking into account the increase in thickness in the final step, and thus given a given inner diameter D a certain inner diameter.
  • the step of reducing the outer diameter of the annular wall 6 may be divided into a plurality of consecutive sub-steps, each performed by means of rotary swaging. This depends, inter alia, on the diameter reduction to be achieved, ie on the difference between the initial outer diameter of the cup-shaped workpiece ( Figure IE) and the predetermined outer diameter D to be achieved of the finished valve stem 12 ( Figure 1F).
  • the individual partial steps can be carried out independently of each other by rotary swaging with or without mandrel. If a high diameter reduction is necessary and thus "many" partial steps, it is possible, for example, to use a mandrel in at least some of the partial steps in order to increase the thickness of the annular wall 6 does not get too big.
  • Rotary swaging is an incremental pressure forming process in which the workpiece to be machined is hammered in rapid succession from different sides in the radial direction. Due to the resulting pressure, the material flows, so to speak, and the material structure is not distorted by tensile stresses. Rotary kneading is preferred as a cold forming process, i. below the recrystallization temperature of the machined material.
  • An essential advantage of the use of rotary kneading as the final forming step is that compressive stresses are induced by the radial introduction of force during rotary kneading, whereby the occurrence of tensile stresses which increase the susceptibility to cracks is prevented, in particular for the edge layers of the hollow shank.
  • Rotary kneading enables inter alia an uninterrupted fiber course in the workpiece
  • Further advantages of rotary kneading as a final forming step - compared to drawing or necking are given by a better achievable surface quality and by a relatively higher diameter reduction of the shaft per step. Due to the high achievable surface quality and the fact that the tolerable tolerances in the rotary swaging are very small, a reworking of the valve stem is usually not necessary. With free-form processes or compression processes - such as necking - in general, only a poorer surface quality or tolerance compliance can be achieved.
  • a cooling medium for example sodium
  • a valve stem which, for example by means of friction welding or a other welding procedure, is attached (not shown in the figures).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un corps de soupape d'une soupape à espaces creux, le procédé consistant à : utiliser un produit semi-fini en forme de coupelle, pourvu d'une paroi annulaire, qui entoure un espace creux, et d'une section de fond ; allonger la paroi et réduire consécutivement un diamètre externe de la paroi annulaire pour obtenir un diamètre externe prédéfini de tige de soupape d'une soupape à fabriquer. L'invention concerne en outre une soupape à espace creux fabriquée par ce procédé.
EP18710811.3A 2017-06-29 2018-03-06 Procédé de fabrication de soupapes à espace creux Active EP3583302B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18710811T PL3583302T3 (pl) 2017-06-29 2018-03-06 Sposób wytwarzania zaworów z pustą przestrzenią

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017114524.9A DE102017114524A1 (de) 2017-06-29 2017-06-29 Verfahren zur Herstellung von Hohlraumventilen
PCT/EP2018/055424 WO2019001781A1 (fr) 2017-06-29 2018-03-06 Procédé de fabrication de soupapes à espace creux

Publications (2)

Publication Number Publication Date
EP3583302A1 true EP3583302A1 (fr) 2019-12-25
EP3583302B1 EP3583302B1 (fr) 2021-04-14

Family

ID=61627077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18710811.3A Active EP3583302B1 (fr) 2017-06-29 2018-03-06 Procédé de fabrication de soupapes à espace creux

Country Status (8)

Country Link
US (1) US11260448B2 (fr)
EP (1) EP3583302B1 (fr)
JP (1) JP7051904B2 (fr)
KR (1) KR102446127B1 (fr)
CN (1) CN110869590B (fr)
DE (1) DE102017114524A1 (fr)
PL (1) PL3583302T3 (fr)
WO (1) WO2019001781A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3882438A4 (fr) * 2018-11-12 2021-11-24 Nittan Valve Co., Ltd. Procédé de fabrication d'une soupape champignon de moteur
DE102019106222A1 (de) * 2019-03-12 2020-09-17 Federal-Mogul Valvetrain Gmbh Verfahren zur Herstellung eines Hohlventils für Verbrennungsmotoren
DE102019106209A1 (de) * 2019-03-12 2020-09-17 Federal-Mogul Valvetrain Gmbh Verfahren zur Herstellung eines Hohlventils für Verbrennungsmotoren
DE102019106214A1 (de) * 2019-03-12 2020-09-17 Federal-Mogul Valvetrain Gmbh Verfahren zur Herstellung eines Hohlventils für Verbrennungsmotoren
CN115697584A (zh) 2020-03-30 2023-02-03 日锻株式会社 发动机的提升阀的制造方法
CN112719201B (zh) * 2020-12-02 2022-09-23 浙江欧伦泰防火设备有限公司 一种阀门锻压工艺
WO2022195730A1 (fr) * 2021-03-16 2022-09-22 フジオーゼックス株式会社 Soupape de moteur creuse et son procédé de production

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009996A (en) * 1931-10-20 1935-08-06 Jr Louis W Gering Method of making valves
US5413073A (en) * 1993-04-01 1995-05-09 Eaton Corporation Ultra light engine valve
US5458314A (en) * 1993-04-01 1995-10-17 Eaton Corporation Temperature control in an ultra light engine valve
DE59707222D1 (de) 1997-08-19 2002-06-13 Trw Deutschland Gmbh Hohlventil für Verbrennungsmotoren
DE20122516U1 (de) 2001-04-11 2005-12-29 Gkn Driveline International Gmbh Vorrichtung zum Abstrecken von zylindrischen Hohlkörpern (Rohrziehen)
JP4390291B1 (ja) * 2008-09-18 2009-12-24 株式会社 吉村カンパニー 中空エンジンバルブの弁傘部の製造方法及び中空エンジンバルブ
US8230597B2 (en) * 2008-10-03 2012-07-31 Ford Global Technologies, Llc Forming preforms and parts therefrom
JP4929408B1 (ja) * 2011-03-22 2012-05-09 三菱重工業株式会社 中空エンジンバルブの製造方法
JP5950440B2 (ja) 2012-01-30 2016-07-13 三菱重工工作機械株式会社 中空エンジンバルブの製造方法
JP2014084725A (ja) 2012-10-19 2014-05-12 Mitsubishi Heavy Ind Ltd エンジンバルブ及びその製造方法
JP5625220B2 (ja) * 2013-01-15 2014-11-19 株式会社飯塚製作所 鍛造方法及び鍛造装置
DE102017114509A1 (de) * 2017-06-29 2019-01-03 Federal-Mogul Valvetrain Gmbh Hohlraumventil mit optimierter Schaftinnengeometrie und Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
KR102446127B1 (ko) 2022-09-21
JP7051904B2 (ja) 2022-04-11
KR20200019904A (ko) 2020-02-25
US20200156144A1 (en) 2020-05-21
CN110869590B (zh) 2021-08-03
DE102017114524A1 (de) 2019-01-03
PL3583302T3 (pl) 2021-11-15
EP3583302B1 (fr) 2021-04-14
WO2019001781A1 (fr) 2019-01-03
US11260448B2 (en) 2022-03-01
JP2020525695A (ja) 2020-08-27
CN110869590A (zh) 2020-03-06

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