US20120304464A1 - Method for manufacturing hollow engine valve - Google Patents

Method for manufacturing hollow engine valve Download PDF

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Publication number
US20120304464A1
US20120304464A1 US13/519,813 US201013519813A US2012304464A1 US 20120304464 A1 US20120304464 A1 US 20120304464A1 US 201013519813 A US201013519813 A US 201013519813A US 2012304464 A1 US2012304464 A1 US 2012304464A1
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US
United States
Prior art keywords
hollow
engine valve
shaping
semi
finished product
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.)
Abandoned
Application number
US13/519,813
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English (en)
Inventor
Hirokazu Morii
Hyoji Yoshimura
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.)
Mitsubishi Heavy Industries Ltd
Yoshimura Co
Original Assignee
Mitsubishi Heavy Industries Ltd
Yoshimura Co
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 Mitsubishi Heavy Industries Ltd, Yoshimura Co filed Critical Mitsubishi Heavy Industries Ltd
Assigned to YOSHIMURA COMPANY, MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment YOSHIMURA COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORII, HIROKAZU, YOSHIMURA, HYOJI
Publication of US20120304464A1 publication Critical patent/US20120304464A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B21D41/045—Closing
    • 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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/16—Remodelling hollow bodies with respect to the shape of the cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • B23P15/002—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings poppet valves
    • 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
    • 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
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • 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
    • 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
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49307—Composite or hollow valve stem or head making

Definitions

  • the present invention relates to a method for producing a hollow engine valve which can simplify production steps and reduce production cost.
  • Patent Document 1 Japanese Patent No. 4282900
  • Patent Document 2 Japanese Patent No. 4390291
  • the hollow engine valve as a finished product is obtained by producing multiple members separately and then eventually joining the members to each other. Accordingly, many steps must be performed to produce the hollow engine valve. Hence, this may make the production steps complicated and increase the production cost.
  • the present invention has been made to solve the problems described above, and an object thereof is to provide a method for producing a hollow engine valve which can simplify production steps and reduce production cost.
  • a hollow stem portion of a semi-finished product is shaped into a predetermined shape by sequentially inserting the hollow stem portion into a plurality of shaping holes different in hole shape to sequentially draw the hollow stem portion in such a way that an outer diameter dimension and an inner diameter dimension of the hollow stem portion are reduced stepwise and a length of the hollow stem portion is increased stepwise
  • the method for producing a hollow engine valve is characterized by comprising: subjecting the semi-finished product to heat treatment in such a way that a hardness of the semi-finished product becomes equal to or less than a predetermined hardness; shaping a stem end sealing portion by causing a wall thickness of an opening edge portion of the hollow stem portion to be increased toward an inner side of the opening edge portion, by using a last one of the shaping holes which has a hole diameter adjusted; and joining gap portions of the stem end sealing portion together.
  • the method for producing a hollow engine valve according to a second aspect of the invention for solving the aforementioned problems is characterized by further comprising adjusting a hole diameter of a stem shaping portion in the last one of the shaping holes, the stem shaping portion configured to shape the hollow stem portion.
  • the method for producing a hollow engine valve according to a third aspect of the invention for solving the aforementioned problems is characterized by further comprising injecting a coolant into the hollow stem portion before the drawing performed by using the last one of the shaping holes.
  • the semi-finished product subjected to heat treatment in such a way that the hardness thereof becomes equal to or less than the predetermined hardness is shaped to have the wall thickness of the opening edge portion of the hollow stem portion increased inward, by using the last shaping hole having the hole diameter thereof adjusted, and the gap portions of the stem end sealing portion shaped by this increase of wall thickness are joined together.
  • the number of parts forming the hollow engine valve 1 can be reduced.
  • the method can simplify production steps and reduce production cost.
  • FIG. 1 is an overall configuration diagram of a cold forging apparatus to which a method for producing a hollow engine valve of the present invention is applied.
  • Part (a) includes a vertical cross-sectional view of a die of the cold forging apparatus which is provided for an n-th drawing step and a vertical cross-sectional view of a semi-finished product shaped with the die
  • Part (b) includes a vertical cross-sectional view of a die of the cold forging apparatus which has been conventionally provided for the n-th drawing step and a vertical cross-sectional view of a semi-finished product shaped with the die.
  • FIG. 3 is a vertical cross-sectional view of a hollow engine valve produced by the producing method of the present invention.
  • a hollow engine valve 1 produced by the producing method of the present invention is used as an intake valve or an exhaust valve of an engine in a vehicle or the like.
  • An inside of the hollow engine valve 1 is filled with metallic sodium N as a coolant.
  • the hollow engine valve 1 is one in which a valve umbrella portion 11 , a hollow stem portion 12 , and a stem end sealing portion 15 are shaped integrally.
  • a hollow hole 13 is formed in the inside of the hollow engine valve 1 , extending through the valve umbrella portion 11 and the hollow stem portion 12 .
  • an opening edge portion on a base end (upper end) side of the hollow stem portion 12 is shaped to close by causing the wall thickness thereof to be increased toward an inner side of the opening edge portion, with the hollow hole 13 filled with the metallic sodium N.
  • gap portions in a center portion of the stem end sealing portion 15 are joined together.
  • the hollow engine valve 1 is produced by using a cold forging apparatus 20 to be described later and the like.
  • Metallic sodium N is injected into the hollow hole 13 during the cold forging, and the joining of the stem end sealing portion 15 is thereafter performed.
  • the hollow engine valve 1 as a finished product can be obtained.
  • the hollow engine valve 1 is sometimes not filled with metallic sodium N depending on usage conditions.
  • the cold forging apparatus 20 shown in FIG. 1 shapes the hollow engine valve 1 by sequentially drawing (cold-forging) a semi-finished product 1 a .
  • a press bed 21 is provided in a lower portion of the cold forging apparatus 20 while a ram 22 is provided in an upper portion of the cold forging apparatus 20 to face the press bed 21 .
  • the ram 22 is supported to be moveable in a vertical direction.
  • Tubular dies Di 1 , Di 2 , Di(m ⁇ 1), Dim, Di(n ⁇ 1), and Din′ are provided on a bottom face of the ram 22 in line along a conveyance direction of the semi-finished products.
  • index m refers to m-th in the order and index n refers to n-th (last) in the order.
  • m ⁇ n is satisfied and m and n are each a positive integer equal to or larger than 3.
  • Shaping holes M 1 , M 2 , M(m ⁇ 1), Mm, M(n ⁇ 1), and Mn′ each having a circular horizontal cross-section are opened respectively in center portions of the dies Di 1 , Di 2 , Di(m ⁇ 1), Dim, Di(n ⁇ 1), and Din′.
  • the shaping holes are formed such that the inner diameters thereof are gradually reduced as the shaping holes are located more downstream in the conveyance direction.
  • the lengths (depths) of the respective shaping holes M 1 , M 2 , M(m ⁇ 1), Mm, M(n ⁇ 1), and Mn′ are respectively L 1 , L 2 , L(m ⁇ 1), Lm, L(n ⁇ 1), and Ln, and the shaping holes are formed such that the lengths L 1 , L(m ⁇ 1), Lm, L(n ⁇ 1), and Ln are gradually increased as the shaping holes are located more downstream in the conveyance direction.
  • these lengths are set such that L 1 ⁇ L 2 ⁇ L(m ⁇ 1) ⁇ Lm ⁇ L(n ⁇ 1) ⁇ Ln is satisfied.
  • semi-finished products 1 a , 1 b , 1 m , and 1 n , and the hollow engine valve 1 can be conveyed and positioned on the top face of the press bed 21 by using conveyance means which is not illustrated.
  • the die Din′ is described by using parts (a) and (b) of FIG. 2 .
  • the die Din′ is used to draw the semi-finished product 1 n shaped by the die Di(n ⁇ 1) and thereby obtain the hollow engine valve 1 as a semi-finished product (joining not yet performed).
  • the opening edge portion of the hollow stem portion 12 is closed to bulge toward the inner side thereof, and the stem end sealing portion 15 is thereby formed.
  • the die Din′ is provided instead of a die Din used conventionally to shape a hollow engine valve (valve body) 1 x whose hollow stem portion has a uniform wall thickness and whose opening edge portion is opened.
  • the shaping hole Mn′ of the die Din′ is formed to have a length of Ln and includes a shaping portion (valve umbrella shaping portion) Man′ for eventually shaping an upper portion of the valve umbrella portion 11 of the hollow engine valve 1 and a shaping portion (stem shaping portion) Mbn′ for shaping the hollow stem portion 12 and the stem end sealing portion 15 of the hollow engine valve 1 , the shaping portion Mbn′ formed continuously with an upper portion of the shaping portion Man′.
  • the shaping portion Man′ is formed to have an inner diameter of Dn at the largest portion while the shaping portion Mbn′ is formed to have an inner diameter of dn′.
  • the hollow engine valve 1 is shaped to have a length (height) of 1 n ′ by performing drawing with the die Din′ described above. Moreover, by this drawing, the hollow engine valve 1 is shaped in such a way that the hollow stem portion 12 and the stem end sealing portion 15 each have an outer diameter of dn′ and the hollow stem portion 12 has an inner diameter of dn 2 .
  • a shaping hole Mn of the die Din is shaped to have a length of Ln and includes a shaping portion Man for eventually shaping an upper portion of a valve umbrella portion of the hollow engine valve 1 x and a shaping portion Mbn for shaping a hollow stem portion of the hollow engine valve 1 x , the shaping portion Mbn formed continuously with an upper portion of the shaping portion Man.
  • the shaping portion Man is formed to have an inner diameter of Dn at the largest portion while the shaping portion Mbn is formed to have an inner diameter of dn which is larger than the inner diameter dn′ (dn>dn′).
  • the hollow engine valve 1 x is shaped to have a length (height) of 1 n , which is larger than 1 n ′ ( 1 n > 1 n ′), by performing drawing with the die Din described above. Moreover, by this drawing, the hollow engine valve 1 x is shaped such that the hollow stem portion has an outer diameter of dn, which is larger than the outer diameter dn′, and an inner diameter of dn 2 .
  • the die Din′ is set in such a way that the inner diameter dn′ is smaller than the inner diameter dn.
  • the hollow engine valve 1 having the stem end sealing portion 15 for closing the opening portion of the hollow stem portion 12 can be shaped.
  • the hollow engine valve 1 is produced as follows. First, a solid round-bar-shaped material which is not illustrated is subjected to hot forging and the semi-finished product 1 a is thereby shaped. Thereafter, the semi-finished product 1 a is subjected to heat treatment in such a way that the hardness thereof becomes equal to or less than a predetermined hardness. Next, the semi-finished product 1 a having the hardness equal to or lower than the predetermined hardness is positioned at a point on the press bed 21 of the cold forging apparatus 20 which corresponds to the die Di 1 .
  • the semi-finished product 1 a is sequentially shaped into the semi-finished products 1 b , 1 c , 1 m , and 1 n .
  • This shaping causes the outer diameter dimension and the inner diameter dimension of each hollow stem portion to be reduced stepwise and the length of each hollow stem portion to be increased stepwise, and the hollow engine valve 1 is eventually formed.
  • the hollow engine valve 1 can be shaped to have the wall thickness of the opening edge portion of the hollow stem portion 12 increased toward the inner side thereof. Moreover, in the drawing with dies Di 1 , Di 2 , Di(m ⁇ 1), Dim, and Di(n ⁇ 1), since hole shapes of the respective shaping holes M 1 , M 2 , M(m ⁇ 1), Mm, and M(n ⁇ 1) of these dies are not adjusted from the conventional ones, the shaping is performed with the opening edge portion of each hollow stem portion opened.
  • the drawing is performed multiple times until the wall thickness of the opening edge portion increases and the opening edge portion is thereby closed.
  • the shaping holes M 1 , M 2 , M(m ⁇ 1), Mm, M(n ⁇ 1), and Mn′ do not press lower portions of the valve umbrella portions in the semi-finished products 1 a , 1 b , 1 m , and 1 n , the outer diameters of the umbrella portions of the semi-finished products at the largest portions are maintained at D o .
  • the hollow hole 13 is already filled with metallic sodium N after any one of the steps of drawing with the dies Di 1 , Di 2 , Di(m ⁇ 1), Dim, and Di(n ⁇ 1) in the cold forging apparatus 20 .
  • the hollow engine valve 1 as a finished product can be produced by joining the gap portions of the stem end sealing portion 15 together by, for example, filler welding or non-filler welding.
  • the stem end sealing portion 15 is not exposed to an exhaust gas of a high temperature.
  • the joining of the gap portions may be performed by blazing or the like, instead of welding.
  • the semi-finished product 1 n subjected to heat treatment in such a way that the hardness thereof becomes equal to or less than a predetermined hardness is shaped to have the wall thickness of the opening edge portion of the hollow stem portion 12 increased toward an inner side thereof, by using the shaping hole Mn′ of the die Din′ adjusted to have the inner diameter of dn′. Thereafter, the gap portions of the stem end sealing portion 15 shaped by the increase in wall thickness are joined together.
  • the method can simplify production steps and reduce production cost.
  • the present invention can be applied to a hollow engine valve producing apparatus which is designed to produce hollow engine valves different in shape in a single producing apparatus by making dies replaceable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Forging (AREA)
US13/519,813 2010-02-26 2010-10-06 Method for manufacturing hollow engine valve Abandoned US20120304464A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2010041411A JP5574752B2 (ja) 2010-02-26 2010-02-26 中空エンジンバルブの製造方法
JP2010-041411 2010-02-26
PCT/JP2010/067506 WO2011104921A1 (fr) 2010-02-26 2010-10-06 Procédé de fabrication de soupape de moteur creuse

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US20120304464A1 true US20120304464A1 (en) 2012-12-06

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US13/519,813 Abandoned US20120304464A1 (en) 2010-02-26 2010-10-06 Method for manufacturing hollow engine valve

Country Status (5)

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US (1) US20120304464A1 (fr)
EP (1) EP2540414A4 (fr)
JP (1) JP5574752B2 (fr)
CN (1) CN102686330B (fr)
WO (1) WO2011104921A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140322660A1 (en) * 2012-01-17 2014-10-30 Nittan Valve Co., Ltd. Automated Heat Treatment System for Engine Valve
US20160326919A1 (en) * 2013-12-27 2016-11-10 Nippon Piston Ring Co., Ltd. Assembly of internal combustion engine valve and valve seat
US11300018B2 (en) 2018-03-20 2022-04-12 Nittan Valve Co., Ltd. Hollow exhaust poppet valve
US11536167B2 (en) 2018-11-12 2022-12-27 Nittan Valve Co., Ltd. Method for manufacturing engine poppet valve
US20230358151A1 (en) * 2021-03-16 2023-11-09 Fuji Oozx Inc. Hollow engine valve and production method thereof
US11850690B2 (en) 2020-03-30 2023-12-26 Nittan Corporation Method for manufacturing engine poppet valve
US11850655B2 (en) 2018-01-10 2023-12-26 Federal-Mogul Valvetrain Gmbh Process and device for manufacturing hollow, internally cooled valves
US20240240577A1 (en) * 2023-01-16 2024-07-18 Mahle International Gmbh Value for an internal combustion engine and production method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5982139B2 (ja) * 2012-03-07 2016-08-31 株式会社岡村製作所 管状部材の製造方法及び管状部材の製造装置
KR101458189B1 (ko) * 2014-01-02 2014-11-05 문명성 중공밸브 제조방법
WO2018137762A1 (fr) * 2017-01-25 2018-08-02 Federal Mogul Valvetrain Gmbh Soupape à disque refroidie de l'intérieur et produit semi-fini et son procédé de production
JP7023886B2 (ja) * 2019-03-20 2022-02-22 武蔵精密工業株式会社 中空シャフト

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411734A (en) * 1942-03-11 1946-11-26 Thompson Prod Inc Cold worked hollow stem valve
US2440461A (en) * 1944-04-22 1948-04-27 Eaton Mfg Co Method of sealing the stem of hollow valves
US2471937A (en) * 1944-01-24 1949-05-31 Thompson Prod Inc Method of making hollow poppet valves
US2731708A (en) * 1952-10-31 1956-01-24 Teves Kg Alfred Process for manufacture of hollow poppet valves especially for internal-combustion engines
US3186209A (en) * 1960-04-14 1965-06-01 Nat Machinery Co Method of cold forming an elongated hollow article
US5054195A (en) * 1989-09-06 1991-10-08 Mercedes-Benz Ag Process for the production of a valve
US5056219A (en) * 1990-02-16 1991-10-15 Aisan Kogyo Kabushiki Kaisha Method of manufacturing hollow engine valve
US5413073A (en) * 1993-04-01 1995-05-09 Eaton Corporation Ultra light engine valve
EP0911493A2 (fr) * 1997-10-21 1999-04-28 Eaton Corporation Embout à structure améliorée pour soupape de moteur ultra - légère
US6139660A (en) * 1997-02-07 2000-10-31 Daido Tokushuko Kabushiki Kaisha High corrosion resisting alloy for diesel engine valve and method for producing the valve
US6161285A (en) * 1998-06-08 2000-12-19 Schwarzkopf Technologies Corporation Method for manufacturing a poppet valve from a γ-TiAl base alloy
EP1640086A1 (fr) * 2004-09-24 2006-03-29 Aisan Kogyo Kabushiki Kaisha Procédé de fabrication de produits allongés avec têtes élargies et machines de forgeage utilisées
US20090266314A1 (en) * 2005-11-15 2009-10-29 Nittan Valve Co., Ltd. Coolant-containing hollow poppet valve and process for producing the same
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB399295A (en) * 1931-12-12 1933-10-05 Thompson Prod Inc Improvements in poppet valves for internal combustion engines and method of making same
JPS59170860A (ja) * 1983-03-16 1984-09-27 Mitsubishi Paper Mills Ltd 電子写真オフセツトマスタ−材料
JPS61189838A (ja) * 1985-02-18 1986-08-23 Mazda Motor Corp パイプ端部の閉塞加工方法
JPH0656088B2 (ja) * 1986-10-28 1994-07-27 富士バルブ株式会社 軽量エンジンバルブ及びその製造方法
JPH07102917A (ja) * 1993-09-30 1995-04-18 Mitsubishi Heavy Ind Ltd Ｎａ封入中空エンジンバルブの製造方法

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411734A (en) * 1942-03-11 1946-11-26 Thompson Prod Inc Cold worked hollow stem valve
US2471937A (en) * 1944-01-24 1949-05-31 Thompson Prod Inc Method of making hollow poppet valves
US2440461A (en) * 1944-04-22 1948-04-27 Eaton Mfg Co Method of sealing the stem of hollow valves
US2731708A (en) * 1952-10-31 1956-01-24 Teves Kg Alfred Process for manufacture of hollow poppet valves especially for internal-combustion engines
US3186209A (en) * 1960-04-14 1965-06-01 Nat Machinery Co Method of cold forming an elongated hollow article
US5054195A (en) * 1989-09-06 1991-10-08 Mercedes-Benz Ag Process for the production of a valve
US5056219A (en) * 1990-02-16 1991-10-15 Aisan Kogyo Kabushiki Kaisha Method of manufacturing hollow engine valve
US5413073A (en) * 1993-04-01 1995-05-09 Eaton Corporation Ultra light engine valve
US6139660A (en) * 1997-02-07 2000-10-31 Daido Tokushuko Kabushiki Kaisha High corrosion resisting alloy for diesel engine valve and method for producing the valve
EP0911493A2 (fr) * 1997-10-21 1999-04-28 Eaton Corporation Embout à structure améliorée pour soupape de moteur ultra - légère
US6161285A (en) * 1998-06-08 2000-12-19 Schwarzkopf Technologies Corporation Method for manufacturing a poppet valve from a γ-TiAl base alloy
EP1640086A1 (fr) * 2004-09-24 2006-03-29 Aisan Kogyo Kabushiki Kaisha Procédé de fabrication de produits allongés avec têtes élargies et machines de forgeage utilisées
US20090266314A1 (en) * 2005-11-15 2009-10-29 Nittan Valve Co., Ltd. Coolant-containing hollow poppet valve and process for producing the same
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

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140322660A1 (en) * 2012-01-17 2014-10-30 Nittan Valve Co., Ltd. Automated Heat Treatment System for Engine Valve
US9086239B2 (en) * 2012-01-17 2015-07-21 Nittan Valve Co., Ltd. Automated heat treatment system for engine valve
US20160326919A1 (en) * 2013-12-27 2016-11-10 Nippon Piston Ring Co., Ltd. Assembly of internal combustion engine valve and valve seat
US10287933B2 (en) * 2013-12-27 2019-05-14 Nippon Piston Ring Co., Ltd. Assembly of internal combustion engine valve and valve seat
US11850655B2 (en) 2018-01-10 2023-12-26 Federal-Mogul Valvetrain Gmbh Process and device for manufacturing hollow, internally cooled valves
US11300018B2 (en) 2018-03-20 2022-04-12 Nittan Valve Co., Ltd. Hollow exhaust poppet valve
US11536167B2 (en) 2018-11-12 2022-12-27 Nittan Valve Co., Ltd. Method for manufacturing engine poppet valve
US11850690B2 (en) 2020-03-30 2023-12-26 Nittan Corporation Method for manufacturing engine poppet valve
US20230358151A1 (en) * 2021-03-16 2023-11-09 Fuji Oozx Inc. Hollow engine valve and production method thereof
US11982212B2 (en) * 2021-03-16 2024-05-14 Fuji Oozx Inc. Hollow engine valve and production method thereof
US20240240577A1 (en) * 2023-01-16 2024-07-18 Mahle International Gmbh Value for an internal combustion engine and production method

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CN102686330B (zh) 2015-09-30
JP2011177718A (ja) 2011-09-15
JP5574752B2 (ja) 2014-08-20
WO2011104921A1 (fr) 2011-09-01
EP2540414A4 (fr) 2017-05-17
CN102686330A (zh) 2012-09-19
EP2540414A1 (fr) 2013-01-02

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