EP3585986A1 - Procédé de fabrication d'une soupape à refroidissement intérieur dotée d'une structure de refroidissement et soupape fabriquée au moyen dudit procédé - Google Patents

Procédé de fabrication d'une soupape à refroidissement intérieur dotée d'une structure de refroidissement et soupape fabriquée au moyen dudit procédé

Info

Publication number
EP3585986A1
EP3585986A1 EP18710795.8A EP18710795A EP3585986A1 EP 3585986 A1 EP3585986 A1 EP 3585986A1 EP 18710795 A EP18710795 A EP 18710795A EP 3585986 A1 EP3585986 A1 EP 3585986A1
Authority
EP
European Patent Office
Prior art keywords
valve
manufacturing
internally cooled
forming
cavity
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
EP18710795.8A
Other languages
German (de)
English (en)
Other versions
EP3585986B1 (fr
Inventor
Thorsten MATTHIAS
Antonius Wolking
Guido Bayard
Arief LUTHFI
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 PL18710795T priority Critical patent/PL3585986T3/pl
Publication of EP3585986A1 publication Critical patent/EP3585986A1/fr
Application granted granted Critical
Publication of EP3585986B1 publication Critical patent/EP3585986B1/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
    • 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

  • a method of manufacturing an internally cooled valve having a cooling structure and a valve made by the method
  • the present invention relates to a manufacturing method for producing an internally cooled valve, wherein in a cavity of the valve, a cooling structure on
  • Valve bottom is attached.
  • the present method further relates to a valve which has been produced by the method according to the invention.
  • Valve bottom falls into the combustion chamber. Furthermore, welding represents a technically complex and costly processing step. It is therefore desirable to have a method by which a cooling structure can be attached to an inner side of a coolant cavity in the region of the valve bottom without separate welds in the region of the valve bottom or of the valve head are necessary. According to the present invention, there is provided a manufacturing method for an internally cooled valve, which comprises providing at least partially in the outside
  • the process is characterized inventive in that the end face of the punch is provided with at least one recess through which a structure is formed on a bottom of the cavity during forming.
  • the cooling structure is impressed from above through a region which is later formed into a valve stem in the inside of a valve bottom. In a later period, the part which later forms the valve stem is reduced in diameter, so that there is a cavity in the later valve, which is in the
  • Valve head has a larger diameter than in the valve stem. Because of this
  • Method can be dispensed with any type of welds in the area of the valve head or the valve bottom.
  • the method may be referred to as imprinting a structure into the cavity in the region of the valve bottom, followed by a step of reshaping a portion of the valve blank into a valve stem without substantially changing the structure in the valve bottom.
  • This initial step can be done directly while reshaping from a disc or
  • cylindrical semifinished product are used, wherein the disc or cylindrical semi-finished product is formed into a cup-shaped valve molding.
  • an already cup-shaped semifinished product in a further processing step to impress the cooling structure inside the valve base and also to deepen the recess at least partially.
  • forming comprises backward extrusion.
  • a single step of a substantially cylindrical or disk-shaped semi-finished product a valve blank can be pressed.
  • a valve or poppet valve is then formed by further processing steps, in the cavity then a coolant such as sodium is introduced.
  • the forming includes forging. It can be used both in forging and in the
  • the structure comprises cooling fins which run in a circle or in a star shape.
  • the cooling fins run in a circular or star-shaped manner from an axis of the valve molding.
  • Another embodiment of the manufacturing method uses a punch of a structure in the form of pins, or cones, or truncated cones in the cavity at Pressing valve bottom, which serve as cooling elements.
  • Straight rod, conical or frusto-conical cooling elements can allow a large heat transfer due to their large surface area. It is also provided on one edge of the piston crown rather use truncated cones and use in the middle rather conical cooling elements.
  • a conical cooling element lying on the symmetry axis of the valve or valve molding can achieve a redirection of the coolant flow from a movement in an axial direction in a radial direction towards the plate rim in order to improve the cooling of the valve head.
  • the structure comprises
  • Vanes which enable a refrigerant in the cavity to move in the cavity to rotate about an axis of symmetry of the valve.
  • Guide vanes be arranged similar to a radial compressor turbine.
  • the method may further include forming a valve head on the valve blank during forming or after forming. In this case, a lower part of the semifinished product or the valve molding is widened and formed into a valve disk or valve disk edge.
  • a diameter of the mold blank in the axial direction adjacent to the valve head is reduced, thereby forming a valve stem.
  • the cup-shaped valve molding must be further formed to be used as a poppet valve.
  • the invention is based on the fact that a recess with a large diameter, larger than the later valve stem diameter, is pressed into a semi-finished product, wherein a structure is injected at the bottom of the depression, which improves cooling of a later valve base. It is particularly advantageous if the later cavity in the valve has a particularly large diameter in order to absorb a lot of heat from the valve bottom can.
  • the proposed method makes it possible by the large diameter of the depression attach or impress of cooling structures on the inside of the valve bottom, since a small ratio of diameter to a height of the punch allows a large power transmission. This is not possible with conventional hollow valves because the necessary stamp have an unfavorable length to diameter ratio and could dodge laterally during a stamping process.
  • swaging preferably formed by hot or cold hammers on a mandrel.
  • the forging tool places radial impacts on the workpiece and thereby gives the machined workpiece a smaller cross-section.
  • the stretching of the material achieves a higher quality than cutting.
  • the manufacturing method comprises rolling or cross wedge rolling on a mandrel, wherein the valve stem is formed by rolling.
  • an internally cooled valve made by any of the above methods.
  • FIGS. 1A to 1F show sectional views of different manufacturing sections of an internally cooled valve according to the invention. Both in the description and in the figures are the same or similar
  • Figure 1 A shows a sectional view of a cylindrical semifinished product 2, as
  • FIG. 1B shows a sectional view of a semifinished product 45 which has been shaped in the shape of a cup.
  • the semifinished product 4 which has been shaped in the shape of a cup, was reshaped from above by a punch, not shown, in the shape of a cup.
  • the forming can be carried out as hot or cold forming.
  • a reverse flow extrusion was used, whereby the height of the formed semi-finished product 4 has increased significantly compared to the unconverted semi-finished product 2 of Figure 1.
  • stamp recesses were present, which have imprinted on the bottom of formed cavity as ribs or elevations. These ribs or elevations form a cooling structure 6, by which the surface of the recess is significantly increased, which is to increase a heat transfer from a later valve bottom to a coolant.
  • Figure IC shows the cup-shaped deformed semi-finished product 4, which was further formed into a first Venilformling 8. It can be used a similar punch to form a valve head 16 by transverse and backward extrusion, wherein in the recess still the cooling structures 6 are arranged.
  • the diameter of the first valve molding 8 in the region of the valve head 16 can be increased, wherein additionally in this step, the thickness of the valve bottom 18 is significantly reduced.
  • Sheep portion 20 can be increased, wherein a diameter of the shaft portion is not increased. It is also possible to transform the semi-finished product of FIG. 1A directly into the first valve blank 8. Thus, in a single step, the first valve blank 8 can also be reshaped by a substantially cylindrical semi-finished product, wherein in the corresponding method the step represented by FIG. 1B is skipped or omitted.
  • Figure 1D shows the first valve blank 8 as further processed by rolling, cross wedge rolling or hammering in the shank portion 22 to reduce the diameter of the shank and increase a length of the shank, thereby producing a second valve blank 10. Also in this processing step, the
  • Cooling structures 6 not or only slightly deformed.
  • FIG. 1C shows the second valve blank 10 of FIG.
  • Valve disc 16 In the last step, an outer diameter of the valve stem 26 on one or almost to a final size.
  • the shaft or the cavity 32 or the recess can now be filled with a coolant (not shown) and the cavity can be closed.
  • a length of the shank 26 ' is also increased to or over a final dimension.
  • the shaft and the valve head can still be machined or cut.
  • the cooling structures 6 were also slightly deformed in the area of the valve bottom 18 of the cavity 30. Overall, however, remains in the region of the valve head 16, a larger cavity which is additionally provided with cooling structures 6, which allow a higher heat transfer from the valve bottom to a coolant in the cavity 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une soupape à refroidissement intérieur, consistant à fournir un semi-produit (2) au moins partiellement cylindrique à l'extérieur, produire ou approfondir une cavité au moins partiellement cylindrique dans le semi-produit (2) par formage à chaud au moyen d'un poinçon, qui permet de produire une préforme de soupape. Selon le procédé, une structure se forme sur un fond de la cavité à travers un évidement au niveau de la surface frontale lors du formage.
EP18710795.8A 2017-06-29 2018-02-28 Procédé de fabrication d'une soupape à refroidissement intérieur dotée d'une structure de refroidissement et soupape fabriquée au moyen dudit procédé Active EP3585986B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18710795T PL3585986T3 (pl) 2017-06-29 2018-02-28 Sposób wytwarzania chłodzonego wewnętrznie zaworu ze strukturą chłodzącą oraz zawór wytwarzany tym sposobem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017114554.0A DE102017114554A1 (de) 2017-06-29 2017-06-29 Verfahren zur Herstellung eines innengekühlten Ventils mit einer Kühlstruktur sowie ein mit dem Verfahren hergestelltes Ventil
PCT/EP2018/054964 WO2019001779A1 (fr) 2017-06-29 2018-02-28 Procédé de fabrication d'une soupape à refroidissement intérieur dotée d'une structure de refroidissement et soupape fabriquée au moyen dudit procédé

Publications (2)

Publication Number Publication Date
EP3585986A1 true EP3585986A1 (fr) 2020-01-01
EP3585986B1 EP3585986B1 (fr) 2020-08-26

Family

ID=61627063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18710795.8A Active EP3585986B1 (fr) 2017-06-29 2018-02-28 Procédé de fabrication d'une soupape à refroidissement intérieur dotée d'une structure de refroidissement et soupape fabriquée au moyen dudit procédé

Country Status (8)

Country Link
US (1) US20200149442A1 (fr)
EP (1) EP3585986B1 (fr)
JP (1) JP2020527662A (fr)
KR (1) KR20200020811A (fr)
CN (1) CN110945214A (fr)
DE (1) DE102017114554A1 (fr)
PL (1) PL3585986T3 (fr)
WO (1) WO2019001779A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023286227A1 (fr) * 2021-07-15 2023-01-19 フジオーゼックス株式会社 Procédé de fabrication de soupape de moteur creuse

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411764A (en) * 1940-08-30 1946-11-26 Thompson Prod Inc Method of manufacturing ribbed dome hollow head valves
US2328512A (en) * 1940-08-30 1943-08-31 Thompson Prod Inc Ribbed dome hollow head valve
US2280758A (en) * 1941-03-07 1942-04-21 Eaton Mfg Co Hollow valve structure
DE3223920A1 (de) * 1982-06-26 1983-12-29 Gesenkschmiede Schneider Gmbh, 7080 Aalen Hohlgeschmiedetes gekuehltes ventil fuer verbrennungsmotoren
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
CN202645663U (zh) * 2012-06-01 2013-01-02 中国南方航空工业(集团)有限公司 气门及具有其的内燃机
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
DE102015116009C5 (de) * 2015-09-22 2020-07-30 Federal-Mogul Valvetrain Gmbh Ventil für Verbrennungsmotoren mit Leitschaufel für Kühlmittel
DE102015220891A1 (de) * 2015-10-26 2017-04-27 Federal-Mogul Valvetrain Gmbh Innengekühltes Ventil für Verbrennungsmotoren sowie Verfahren und Vorrichtung zu dessen Herstellung
DE102015118495A1 (de) * 2015-10-29 2017-05-04 WF Maschinenbau und Blechformtechnik GmbH & Co. KG Verfahren zur Herstellung eines Ventilstößels sowie Ventilstößel

Also Published As

Publication number Publication date
KR20200020811A (ko) 2020-02-26
PL3585986T3 (pl) 2021-03-08
DE102017114554A1 (de) 2019-01-03
WO2019001779A1 (fr) 2019-01-03
US20200149442A1 (en) 2020-05-14
CN110945214A (zh) 2020-03-31
JP2020527662A (ja) 2020-09-10
EP3585986B1 (fr) 2020-08-26

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