WO2007057946A1 - 冷媒入り中空ポペットバルブおよびその製造方法 - Google Patents
冷媒入り中空ポペットバルブおよびその製造方法 Download PDFInfo
- Publication number
- WO2007057946A1 WO2007057946A1 PCT/JP2005/020975 JP2005020975W WO2007057946A1 WO 2007057946 A1 WO2007057946 A1 WO 2007057946A1 JP 2005020975 W JP2005020975 W JP 2005020975W WO 2007057946 A1 WO2007057946 A1 WO 2007057946A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- poppet valve
- refrigerant
- hollow poppet
- hardness
- neck
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 40
- 239000002826 coolant Substances 0.000 title abstract description 4
- 238000010622 cold drawing Methods 0.000 claims abstract description 25
- 238000000137 annealing Methods 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 6
- 238000010273 cold forging Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 235000019589 hardness Nutrition 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 11
- 238000003466 welding Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000574 NaK Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
-
- 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
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/005—Circulation means for a separate heat transfer fluid
- F16K49/007—Circulation means for a separate heat transfer fluid located within the obturating element
-
- 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
- F01L2301/00—Using particular materials
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
-
- 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 provides a technique relating to a refrigerant-containing hollow poppet valve having improved heat resistance, wear resistance, and strength in accordance with the use condition of the valve, and a method for manufacturing the same.
- the present invention provides a technique related to a hollow poppet valve in which a cap is integrated by welding into a fillet region formed integrally with one end of a cylindrical stem portion and a method for manufacturing the same.
- the conventional technology maintains the hardness of the face surface 150 as high as possible, and at the same time, other parts of the valve including the fillet region 140 (F region in Fig. 8: 350HV to 399HV).
- the fillet region 140 F region in Fig. 8: 350HV to 399HV.
- fatigue strength and creep strength could be maintained by increasing the hardness as much as possible.
- Patent Document 1 International Publication WO00Z47876
- Figure 9 shows the austenitic stainless steel material used for hollow poppet valves, cold-worked into three types of hardness (Vickers hardness 151, 316, 380HV), with different temperature conditions (horizontal axis) and 1
- This test result shows the change in fatigue strength (vertical axis) when the test was conducted under 10 million cycles.
- Figure 10 shows the change in creep strength (vertical axis) over time (horizontal axis: Larson Miller parameter value) when a noble of the same material as in Figure 9 was tested at a temperature of 600 ° C. As with 9, it is based on three types of hardness that have been cold worked.
- the fatigue strength of the valve material increases as the hardness increases, and the rate at which the fatigue strength decreases when used between room temperature (25 ° C) and 400 ° C This is also considered to be comparatively sluggish.
- the rate of decrease in the fatigue strength of the material is extremely large at the hardest 380HV compared to the hardness of 151HV and 316HV.
- the creep strength of the valve material when used at 600 ° C with a hardness of 380 HV, decreases significantly over time, compared to the parts with hardness of 151 and 316 HV. I understand.
- the reason why the fatigue strength and creep strength are significantly reduced when the hardness is set to 380HV and 600 ° C is used is that the processed structure is recrystallized and transformed to a hardness of 380HV.
- the fillet region 14 that is, the neck of the valve, pulls the neck by repeatedly coming into contact with the 150-side cylinder-side seat surface when the valve is opened and closed at a high temperature exceeding 500 ° C. Since it is assumed that it will be subjected to a load, if the processing hardness increases too much due to cold heating, the fatigue strength and taper strength required during use cannot be maintained, and problems such as fracture will occur. It can be said that there is a fear.
- the stem portion corresponding to the G region in FIG. 8, that is, the columnar shaft portion, which continues below the neck portion, is subjected to repeated cylinder-side forces as with the neck portion, and is opposed to the guide portion. Therefore, there is a problem in that the fatigue strength required for the load and the wear resistance against sliding cannot be maintained when processed to a uniform hardness with the neck.
- the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to determine the use characteristics of each part of the valve by using cold working and heat treatment under high temperature and high cycle use.
- We provide a hollow poppet valve with a refrigerant with a fillet region (neck) that maintains the fatigue strength and creep strength under high-temperature use, and a method for manufacturing the same.
- the specified fatigue strength and wear resistance are maintained.
- Another object of the present invention is to provide a refrigerant-filled hollow poppet valve having a stem portion (shaft portion) or a face surface (portion) having a predetermined wear resistance, and a method for manufacturing the same.
- the material is formed into a cup shape, and the opening edge of the cup-shaped molded product is formed into a thick wall shape.
- the neck has a Vickers hardness of about 250 HV or more and 35 OHV or less.
- the refrigerant-containing hollow poppet valve according to claim 1 is provided.
- V, the Vickers hardness of the shaft portion is about 350 HV or more.
- the surface layer portion of the tapered face portion has a Vickers hardness of about 380 HV or more.
- the cold press forming step of forming the material into a cup shape and forming the opening edge of the cup-shaped product into a thick shape An intermediate annealing step for softening the cup-shaped molded product, a neck portion opening in a flared shape is formed at the opening end of the cup-shaped molded product, and a cylindrical shaft portion is formed integrally with the neck portion, so that the thick wall
- a cold drawing step of forming a tapered face portion on the outer periphery of the open edge of the shape, and a manufacturing method of a hollow poppet valve containing a refrigerant at least once before the start of the cold drawing step The Vickers hardness of the neck is set to approximately 250 HV or more and 350 HV or less by performing the intermediate annealing process as necessary and performing the intermediate annealing process as many times as necessary during the cold drawing process.
- the Vickers hardness of the shaft portion is set to approximately 350 HV or more by the cold drawing process.
- the cold drawing process maintains the fatigue strength required for repeated contact between the valve and the cylinder side at the shaft portion, and the resistance required for sliding against the guide.
- the hollow poppet valve with a refrigerant according to claim 2 in which wear resistance is maintained can be produced.
- the process is performed by the cold forging step after the cold drawing step.
- the Vickers hardness of the surface part of the steel part was set to approximately 380 HV or higher.
- the hollow poppet valve with refrigerant according to the present invention has the necessary fatigue strength and clave strength even when the neck is used under high temperature and high cycle conditions by cold drawing and intermediate annealing processes. Is suitable for use in engines where the inside of the cylinder becomes hot.
- the shaft portion since the shaft portion maintains the necessary fatigue strength and wear strength, it is possible to achieve high strength against friction caused by repeated load caused by contact with the cylinder side and sliding with the guide.
- the method for producing a hollow poppet valve with refrigerant according to the invention can produce a hollow poppet valve with refrigerant suitable for use in an engine in which the inside of the cylinder is hot.
- a valve having a shaft portion that is resistant to repeated tensile loads and wear can be manufactured.
- FIG. 1 is a partially cutaway front view of a refrigerant-filled hollow poppet valve according to an embodiment of the present invention
- FIG. 2 is an enlarged cross-sectional view around a cap welded portion
- FIG. 3 is a production of the hollow poppet valve.
- Figure 4 shows the process
- Figure 4 shows the cold drawing process during the manufacturing process
- Figure 5 shows the cold rolling process.
- Fig. 6 shows the change in fatigue strength when the material is subjected to fatigue test, the hardness of the neck and the fatigue strength when used at high temperatures
- Fig. 6 shows the change in the hardness of the shaft and fatigue strength when used at a specified temperature
- Fig. 7 Fig. 8 shows the results of measuring the hardness of the shaft, neck and face of the prototype
- Fig. 8 is an enlarged cross-sectional view around the cap weld in the prior art
- Fig. 9 is the fatigue of the cold work material used in the valve
- Fig. 10 shows the results of the test
- Fig. 10 shows the results of the cleave test of the cold-worked material used in the valve.
- FIG. 1 that is a partially broken front view of a hollow poppet valve that is an embodiment of the present invention
- Fig. 2 that is an enlarged cross-sectional view of the periphery of a cap weld
- reference numeral 10 denotes a hollow poppet valve.
- a neck portion 14 flared is formed at the upper end portion of the cylindrical shaft portion 12 whose lower end portion is closed.
- the shaft portion 12 is formed to have a substantially uniform thickness except for the neck portion 14, and the neck portion 14 is formed so as to gradually become thicker toward the opening edge side (upper side in FIG. 1).
- a thick portion 30 is provided at the opening edge portion, and a face portion 15 is formed on the outer periphery thereof, and is configured so as not to be affected by cap welding heat.
- a disc-like cap 16 is integrally welded to the opening edge of the neck 14 by welding.
- Reference numeral 18 is a cotter groove provided on the outer periphery of the lower end portion of the shaft portion 12, and reference numeral 19 is a tip portion provided on the lower end portion of the shaft portion 12.
- the material of the valve for example, austenitic stainless steel such as SUS305 or SUS304 as the material of the valve.
- the refrigerant for example, it is conceivable to use a liquid metal such as potassium sodium alloy.
- the coolant is removed by cutting the tip portion 19 by cutting or the like, filling the inside of the valve after processing, and then welding another tip 19 to close the lid.
- the refrigerant conducts heat from the neck portion 14 to the tip portion 19 side, and contributes to weight reduction of the valve.
- a blank material W as a material is formed into a cup shape by cold pressing.
- This cold press formation The molding process consists of the process of narrowing the blank material W into a cup shape and the opening side of the cup-shaped molded product W.
- an intermediate annealing step is performed in order to facilitate molding by a transfer press performed later and to process each part of the valve to an appropriate hardness.
- the intermediate annealing process is performed at least once after the cold press forming process and before the cold drawing process. Further, when it is difficult to form such as hard material, it is performed between the cold press forming step and the cold drawing step described later.
- the cup-shaped molded product W is transferred using a transfer press.
- a cylindrical shaft portion 12 a neck portion 14 shaped to open in a flared shape on the cup opening edge side, and a tapered face portion 15 on the outer periphery of the cup opening portion are formed. Furthermore, a thick product 30b, 30c and a step 14a that supports the cap 16 are press-molded on the edge side of the cup opening, thereby forming a molded product W of a predetermined size in which a flared neck 14 is formed. , W
- the cup-shaped molded product at the left end of FIG. 4 formed by the cold press molding process is press-fitted into a slightly thin mold and slightly pressed.
- Each part of the valve is cured as the number of drawing operations by press-fitting increases, but an intermediate annealing step is appropriately performed in the middle so that the hardness does not become too hard when a predetermined shape is formed.
- Figure 5 shows the change in fatigue strength (vertical axis) versus the Vickers hardness (horizontal axis) of the material (SUS305 in this case).
- the temperature is 600 ° C under the conditions of use at the neck of the valve.
- 300 MPa on the vertical axis is the fatigue strength required for the neck 14.
- the fatigue strength exceeds the required fatigue strength of 300MPa and increases to a hardness of about 316HV. If the hardness is further increased, the fatigue strength decreases, and if the hardness exceeds about 360 HV, the required 30 OMPa will be interrupted. Therefore, in order to maintain the fatigue strength at 300 MPa or higher, the hardness of the neck should be approximately 250 HV or higher and 350 HV or lower in consideration of product variations. Can be considered.
- Fig. 6 shows the force temperature indicating the change in fatigue strength (vertical axis) with respect to the Vickers hardness (horizontal axis) of the material (SUS305 in this case) as in Fig. 5. Assuming 12 operating conditions, the temperature is from room temperature (25 ° C) to 400 ° C or lower. Since fatigue strength decreases with increasing temperature, a decrease in fatigue strength at 400 ° C is a problem. Note that 500 MPa is the fatigue strength required for the shaft portion 12.
- the fatigue strength of the material under the use of 400 ° C exceeds the required fatigue strength of 500 MPa when the hardness exceeds about 316HV.
- the fatigue strength increases as the hardness increases thereafter. Therefore, in order to maintain the fatigue strength at 50 OMPa or higher, it is conceivable that the hardness of the shaft portion 12 should be approximately 35 OHV or higher in consideration of product variations.
- the hardness of the face portion 15 should be approximately 380 HV or more in consideration of the wear resistance of the surface layer portion because it is necessary to increase the adhesion to the cylinder side as much as possible.
- the shaft portion 12 is repeatedly drawn so as not to fall below the hardness force 350HV after being formed into a predetermined shape.
- the face 15 is subjected to a cold forging process after the cold drawing process until the hardness of the surface layer exceeds 380 HV to increase the hardness! ]
- the hardness of the neck part 14, the shaft part 12, and the face part 15 is desirably set to the required minimum hardness in consideration of the cost increase due to the increase in the number of machining operations.
- a mandrel may be used as necessary.
- the cotter groove 18 is formed on the lower end portion of the shaft portion 12 by roll forming or the like.
- a cap 16 that has been manufactured separately from the shaft portion 12 is welded to the stepped portion 14a inside the neck portion 14 by electron beam welding or laser beam welding.
- Fig. 7 shows the Vickers hardness measured at the shaft 12, neck 14, and face 15 of the prototype. It is a fixed one.
- the range from 370HV to 402HV at the lower right corresponds to the face part 15, the region from 279HV to 351HV above it corresponds to the neck 14, and the range from 30.5HV to 390HV above it.
- the region corresponds to the shaft portion 12.
- the cold drawing process, intermediate annealing process, and cold forging process should be performed to approximate the hard hardness distribution, so that each part of the valve has fatigue strength, creep strength, and wear resistance according to the usage characteristics. Will be provided.
- FIG. 1 is a partially cutaway front view of a refrigerant-containing hollow poppet valve that is an embodiment of the present invention.
- FIG. 2 is an enlarged cross-sectional view around a cap welded portion.
- FIG. 3 is a longitudinal sectional view showing a manufacturing process of the hollow poppet valve containing the refrigerant.
- FIG. 4 is a diagram showing a cold drawing process during the manufacturing process.
- FIG. 5 is a diagram showing changes in neck hardness and fatigue strength when used at high temperatures based on cold rolled material test results.
- FIG. 6 is a graph showing changes in hardness of a shaft portion and fatigue strength when used at a predetermined temperature.
- FIG. 7 A diagram showing the results of measuring the hardness of the shaft, neck and hose of the prototype.
- FIG. 8 is an enlarged cross-sectional view around a cap weld in the prior art.
- FIG. 9 is a diagram showing the results of a fatigue test of a cold-worked material used for a valve.
- FIG. 10 is a diagram showing a result of a creep test of a cold-worked material used for a valve.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Forging (AREA)
- Lift Valve (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007545120A JP4871293B2 (ja) | 2005-11-15 | 2005-11-15 | 冷媒入り中空ポペットバルブおよびその製造方法 |
US12/093,364 US20090266314A1 (en) | 2005-11-15 | 2005-11-15 | Coolant-containing hollow poppet valve and process for producing the same |
CN2005800520594A CN101305168B (zh) | 2005-11-15 | 2005-11-15 | 装入制冷剂空心提升阀及其制造方法 |
PCT/JP2005/020975 WO2007057946A1 (ja) | 2005-11-15 | 2005-11-15 | 冷媒入り中空ポペットバルブおよびその製造方法 |
EP05806844.6A EP1950384B1 (en) | 2005-11-15 | 2005-11-15 | Coolant-containing hollow poppet valve and process for producing the same |
KR1020087011668A KR100981100B1 (ko) | 2005-11-15 | 2005-11-15 | 냉매포함 중공 포펫 밸브 및 그 제조방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/020975 WO2007057946A1 (ja) | 2005-11-15 | 2005-11-15 | 冷媒入り中空ポペットバルブおよびその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007057946A1 true WO2007057946A1 (ja) | 2007-05-24 |
Family
ID=38048338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020975 WO2007057946A1 (ja) | 2005-11-15 | 2005-11-15 | 冷媒入り中空ポペットバルブおよびその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090266314A1 (ja) |
EP (1) | EP1950384B1 (ja) |
JP (1) | JP4871293B2 (ja) |
KR (1) | KR100981100B1 (ja) |
CN (1) | CN101305168B (ja) |
WO (1) | WO2007057946A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009036670A (ja) * | 2007-08-02 | 2009-02-19 | Babcock Hitachi Kk | オーステナイト鋼の使用温度推定方法 |
WO2011104912A1 (ja) * | 2010-02-26 | 2011-09-01 | 三菱重工業株式会社 | 金属ナトリウム封入エンジンバルブの製造方法 |
WO2011142287A1 (ja) * | 2010-05-12 | 2011-11-17 | 三菱重工業株式会社 | 金属ナトリウム封入エンジンバルブの製造方法 |
US8881391B2 (en) | 2010-02-26 | 2014-11-11 | Mitsubishi Heavy Industries, Ltd. | Method for producing hollow engine valve |
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 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
JP5574752B2 (ja) * | 2010-02-26 | 2014-08-20 | 三菱重工業株式会社 | 中空エンジンバルブの製造方法 |
DE102012008945A1 (de) * | 2012-05-05 | 2013-11-07 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor |
JP5463439B1 (ja) * | 2012-10-02 | 2014-04-09 | 日鍛バルブ株式会社 | 中空ポペットバルブ |
US9920663B2 (en) * | 2013-04-11 | 2018-03-20 | Nittan Valve Co., Ltd. | Hollow poppet valve |
DK177960B1 (en) * | 2014-04-08 | 2015-02-02 | Man Diesel & Turbo Deutschland | An exhaust valve for an internal combustion engine |
DE102017114509A1 (de) * | 2017-06-29 | 2019-01-03 | Federal-Mogul Valvetrain Gmbh | Hohlraumventil mit optimierter Schaftinnengeometrie und Verfahren zu dessen Herstellung |
US10787939B1 (en) | 2019-04-01 | 2020-09-29 | Cyclazoom, LLC | Poppet valve for internal combustion engine |
US11506091B2 (en) * | 2021-03-03 | 2022-11-22 | Cyclazoom, LLC | Poppet valve and internal combustion piston engine head including same |
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- 2005-11-15 WO PCT/JP2005/020975 patent/WO2007057946A1/ja active Application Filing
- 2005-11-15 EP EP05806844.6A patent/EP1950384B1/en not_active Ceased
- 2005-11-15 US US12/093,364 patent/US20090266314A1/en not_active Abandoned
- 2005-11-15 KR KR1020087011668A patent/KR100981100B1/ko active IP Right Grant
- 2005-11-15 CN CN2005800520594A patent/CN101305168B/zh not_active Expired - Fee Related
- 2005-11-15 JP JP2007545120A patent/JP4871293B2/ja not_active Expired - Fee Related
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009036670A (ja) * | 2007-08-02 | 2009-02-19 | Babcock Hitachi Kk | オーステナイト鋼の使用温度推定方法 |
WO2011104912A1 (ja) * | 2010-02-26 | 2011-09-01 | 三菱重工業株式会社 | 金属ナトリウム封入エンジンバルブの製造方法 |
JP2011179326A (ja) * | 2010-02-26 | 2011-09-15 | Mitsubishi Heavy Ind Ltd | 金属ナトリウム封入エンジンバルブの製造方法 |
US8713793B2 (en) | 2010-02-26 | 2014-05-06 | Mitsubishi Heavy Industries, Ltd. | Method for producing metallic-sodium-filled engine valve |
US8881391B2 (en) | 2010-02-26 | 2014-11-11 | Mitsubishi Heavy Industries, Ltd. | Method for producing hollow engine valve |
WO2011142287A1 (ja) * | 2010-05-12 | 2011-11-17 | 三菱重工業株式会社 | 金属ナトリウム封入エンジンバルブの製造方法 |
CN102859130A (zh) * | 2010-05-12 | 2013-01-02 | 三菱重工业株式会社 | 金属钠封入发动机气门的制造方法 |
US8561297B2 (en) | 2010-05-12 | 2013-10-22 | Mitsubishi Heavy Industries, Ltd. | Method for producing engine valve in which sodium metal is sealed |
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 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2007057946A1 (ja) | 2009-04-30 |
EP1950384B1 (en) | 2014-03-19 |
CN101305168B (zh) | 2010-05-12 |
EP1950384A1 (en) | 2008-07-30 |
JP4871293B2 (ja) | 2012-02-08 |
CN101305168A (zh) | 2008-11-12 |
EP1950384A4 (en) | 2009-11-25 |
KR20080070004A (ko) | 2008-07-29 |
KR100981100B1 (ko) | 2010-09-08 |
US20090266314A1 (en) | 2009-10-29 |
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