EP3585986B1 - 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 Download PDF

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Publication number
EP3585986B1
EP3585986B1 EP18710795.8A EP18710795A EP3585986B1 EP 3585986 B1 EP3585986 B1 EP 3585986B1 EP 18710795 A EP18710795 A EP 18710795A EP 3585986 B1 EP3585986 B1 EP 3585986B1
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EP
European Patent Office
Prior art keywords
valve
manufacturing
internally cooled
rolling
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.)
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EP18710795.8A
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German (de)
English (en)
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EP3585986A1 (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
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Federal Mogul Valvetrain GmbH
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Priority to PL18710795T priority Critical patent/PL3585986T3/pl
Publication of EP3585986A1 publication Critical patent/EP3585986A1/fr
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Publication of EP3585986B1 publication Critical patent/EP3585986B1/fr
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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

  • the present invention relates to a manufacturing method for manufacturing an internally cooled valve, a cooling structure being attached to the valve base in a cavity of the valve.
  • the present method further relates to a valve which was produced using the method according to the invention.
  • the American patent application US 2280758 relates to an internally cooled valve with a structure on an inside of the valve disk that is intended to deflect the coolant in the direction of an outside of the valve.
  • patent documents CN 202645663 U and DE 102015116009 B3 relate to internally cooled valves whose cavity is closed by a cover on the valve disk surface.
  • German patent application DE 102015118495 A1 discloses a method for forming disk-shaped blanks by deep drawing and pressing into a valve.
  • a manufacturing method for an internally cooled valve blank for an internally cooled valve with the features of claim 1 is already provided.
  • Preferred embodiments of the method and the finished valve are described in the dependent claims.
  • provided which comprises providing a semifinished product which is at least partially cylindrical on the outside, generating or deepening an at least partially cylindrical cavity in the semifinished product by hot forming with a punch, whereby a valve molding is produced.
  • the procedure stands out 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 reshaping. In this way, the cooling structure is embossed from above into the inside of a valve base through an area which is later formed into a valve stem.
  • the part that will later form the valve stem is reduced in diameter, so that a cavity is present in the later valve which has a larger diameter in the valve head than in the valve stem.
  • any type of weld seams in the area of the valve head or the valve base can be dispensed with.
  • the method can be referred to as embossing a structure in the cavity in the area of the valve base, followed by a step of reshaping a part of the valve blank into a valve stem without essentially changing the structure in the valve base.
  • This initial step can be used directly when forming from a disk-shaped or cylindrical semi-finished product, with the disk-shaped or cylindrical semi-finished product being reshaped into a cup-shaped valve molding.
  • a semi-finished product that is already cup-shaped, however, it is also possible in a further processing step to emboss the cooling structure on the inside of the valve base and also to at least partially deepen the recess.
  • the forming comprises a reverse extrusion.
  • a valve molding can be pressed in a single step from an essentially cylindrical or disk-shaped semi-finished product.
  • a valve or poppet valve is then formed from the valve molding by further processing steps, into the cavity of which a coolant such as sodium is then introduced.
  • the forming includes forging.
  • a valve disk can also be molded on both during forging and reverse extrusion.
  • the structure comprises cooling fins that run in a circular or star shape.
  • the cooling fins run in a circular or star shape from an axis of the valve molding.
  • Another embodiment of the manufacturing process uses a stamp of a structure in the form of pins, or cones, or truncated cones in the cavity on Press-fit valve base, which serve as cooling elements.
  • Rod-shaped, conical or also frustoconical cooling elements can enable a large heat transfer due to their large surface. It is also intended to use truncated cones at an edge of the piston crown and rather conical cooling elements in the middle.
  • a conical cooling element lying on the axis of symmetry of the valve or valve blank can also divert the coolant flow from a movement in an axial direction in a radial direction towards the cup rim in order to improve the cooling of the valve head.
  • the structure comprises guide vanes which can set a coolant moving in the cavity in the valve into rotation about an axis of symmetry of the valve.
  • the guide vanes can be arranged in a manner similar to that of a radial compressor turbine.
  • the method can further comprise, during the reshaping or after the reshaping, a molding of a valve head onto the valve molding.
  • a lower part of the semi-finished product or the valve blank is widened and shaped into a valve disk or valve disk edge.
  • a diameter of the valve molding is reduced in the axial direction next to the valve head, and a valve stem is thus formed.
  • the cup-shaped valve molding has to be further formed in order 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, with a structure being pressed into the bottom of the recess which improves cooling of a later valve base. It is particularly advantageous if the subsequent cavity in the valve has a particularly large diameter in order to be able to absorb a particularly large amount of heat from the valve base.
  • the proposed method enables cooling structures to be attached or impressed on the inside of the valve base, since here a low ratio of diameter to a height of the punch enables a large amount of force to be transmitted. This is not possible with conventional hollow valves because the stamps required for this have an unfavorable length to diameter ratio and could give way to the side during a stamping process.
  • valve stem is formed by rolling, rotary kneading, preferably by hot or cold hammering on a mandrel.
  • the forging tool gives the workpiece radial blows and thus gives the machined workpiece a smaller cross-section. By stretching the material, you can achieve a higher quality than with machining.
  • Mandrels can be used to ensure that a cavity in the interior of the workpiece has a desired inside diameter.
  • the manufacturing method comprises rolling or cross-wedge rolling on a mandrel, the valve stem being formed by the rolling.
  • an internally cooled valve which has been produced by one of the above methods.
  • FIGS. 1A to 1F are sectional views of various production sections of an internally cooled valve according to the invention are shown.
  • Figure 1A shows a sectional view of a cylindrical semi-finished product 2, which is used as a starting material for the production of an internally cooled poppet valve.
  • Figure 1B shows a sectional view of a cup-shaped deformed semi-finished product 45.
  • the cup-shaped deformed semi-finished product 4 was deformed from above into a cup-shaped by a punch (not shown). The forming can be carried out as hot or cold forming. Backward extrusion was used here, as a result of which the height of the deformed semifinished product 4 compared to the non-deformed semifinished product 2 is from Figure 1 has increased significantly.
  • a good diameter-to-length ratio makes it possible to use back extrusion without the risk of the punch deforming laterally.
  • Figure 1C shows the cup-shaped formed semi-finished product 4, which was further formed into a first valve molding 8.
  • a similar punch can be used to form a valve head 16 by transverse and backward extrusion, the cooling structures 6 still being arranged in the recess.
  • the diameter of the first valve molding 8 in the area of the valve head 16 can be increased, the thickness of the valve base 18 also being significantly reduced in this step.
  • a length of a sheep portion 20 can be increased at the same time by a proportion of a backward extrusion, wherein a diameter of the shaft portion is not increased.
  • the first valve molding 8 can therefore also be reshaped in a single step from an essentially cylindrical semi-finished product, with the step that is performed by Figure 1B is shown, is skipped or omitted.
  • Figure 1D shows the first valve molding 8 as it has been further processed by rolling, cross-wedge rolling or hammering in the shaft region 22 in order to reduce the diameter of the shaft and to increase a length of the shaft, whereby a second valve molding 10 was produced.
  • the cooling structures 6 are not or only slightly deformed.
  • FIG. 10 shows the second valve molding 10 of FIG Figure 1D which was further processed by rolling, cross-wedge rolling or hammering in the shank area 24, whereby the diameter of the shank 24 was further reduced and a length of the shank 24 was further increased.
  • the second valve molding 10 was reshaped into a third valve molding 12.
  • the cooling structures 6 in the region of the valve base 18 of the cavity 30 are not or only slightly deformed.
  • Figure 1E shows the third valve molding 12 after further processing by rolling, cross-wedge rolling or hammering in the stem area 24 and at the transition to the valve disk 16.
  • an outer diameter of the valve stem 26 can be 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 shaft 26 ' is also increased up to or above a final dimension.
  • the shaft and the valve head can also be finished by machining or abrasion.
  • the cooling structures 6 also wound slightly in the area of the valve base 18 of the cavity 30. Overall, however, a larger cavity remains in the area of the valve head 16, which is additionally provided with cooling structures 6, which enable a higher heat transfer from the valve base to a coolant in the cavity 32.

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

Claims (9)

  1. Procédé de fabrication d'une vanne à refroidissement intérieur, comprenant
    le fait de prévoir un produit semi-fini (2) qui est au moins partiellement de forme cylindrique à l'extérieur,
    le fait de créer une cavité au moins partiellement de forme cylindrique dans le produit semi-fini (2) par formage à chaud avec un poinçon, créant ainsi une ébauche de vanne,
    caractérisé en ce que le formage à chaud comprend un filage arrière, par lequel
    lors du formage à chaud, une structure est formée sur un fond de la cavité au moyen d'un évidement présent sur une face d'extrémité du poinçon.
  2. Procédé de fabrication selon la revendication 1, dans lequel la structure comprend des ailettes de refroidissement qui sont circulaires ou en forme d'étoile.
  3. Procédé de fabrication selon la revendication 1 ou la revendication 2, dans lequel la structure comprend des broches ou des cônes ou des cônes tronqués servant d'éléments de refroidissement.
  4. Procédé de fabrication selon la revendication 1, 2 ou 3, dans lequel la structure comprend des pales qui peuvent faire tourner un liquide de refroidissement dans une vanne.
  5. Procédé de fabrication selon l'une des revendications ci-dessus, dans lequel une tête de vanne est formée sur l'ébauche de vanne pendant le formage à chaud.
  6. Procédé de fabrication, dans lequel, après que la tête de vanne a été formée selon la revendication 5, un diamètre de l'ébauche de vanne est réduit dans la direction axiale à proximité de la tête de vanne pour former une tige de vanne.
  7. Procédé de fabrication d'une vanne à refroidissement interne selon la revendication 6, dans lequel la tige de la vanne est formée par roulage par estampage rotatif, de préférence par martelage à chaud ou à froid sur un mandrin.
  8. Procédé de fabrication d'une vanne à refroidissement interne selon la revendication 6, dans lequel la tige de vanne est formée par roulage, de préférence par roulage sur un mandrin ou par roulage par coin transversal.
  9. Vanne à refroidissement interne produite par un procédé selon l'une quelconque des revendications 1 à 8.
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 EP3585986A1 (fr) 2020-01-01
EP3585986B1 true EP3585986B1 (fr) 2020-08-26

Family

ID=61627063

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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
JPWO2023286227A1 (fr) * 2021-07-15 2023-01-19

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280758A (en) * 1941-03-07 1942-04-21 Eaton Mfg Co Hollow valve structure
US2328512A (en) * 1940-08-30 1943-08-31 Thompson Prod Inc Ribbed dome hollow head valve
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
EP2811126A1 (fr) * 2012-01-30 2014-12-10 Mitsubishi Heavy Industries, Ltd. Procédé de production d'une soupape de moteur creuse
DE102015116009B3 (de) * 2015-09-22 2017-01-26 Federal-Mogul Valvetrain Gmbh Ventil für Verbrennungsmotoren mit Leitschaufel für Kühlmittel
DE102015118495A1 (de) * 2015-10-29 2017-05-04 WF Maschinenbau und Blechformtechnik GmbH & Co. KG Verfahren zur Herstellung eines Ventilstößels sowie Ventilstößel

Family Cites Families (3)

* 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
DE3223920A1 (de) * 1982-06-26 1983-12-29 Gesenkschmiede Schneider Gmbh, 7080 Aalen Hohlgeschmiedetes gekuehltes ventil fuer verbrennungsmotoren
DE102015220891A1 (de) * 2015-10-26 2017-04-27 Federal-Mogul Valvetrain Gmbh Innengekühltes Ventil für Verbrennungsmotoren sowie Verfahren und Vorrichtung zu dessen Herstellung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2811126A1 (fr) * 2012-01-30 2014-12-10 Mitsubishi Heavy Industries, Ltd. Procédé de production d'une soupape de moteur creuse
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
DE102015116009B3 (de) * 2015-09-22 2017-01-26 Federal-Mogul Valvetrain Gmbh Ventil für Verbrennungsmotoren mit Leitschaufel für Kühlmittel
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
WO2019001779A1 (fr) 2019-01-03
EP3585986A1 (fr) 2020-01-01
KR20200020811A (ko) 2020-02-26
CN110945214A (zh) 2020-03-31
JP2020527662A (ja) 2020-09-10
DE102017114554A1 (de) 2019-01-03
US20200149442A1 (en) 2020-05-14
PL3585986T3 (pl) 2021-03-08

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