WO2000047876A1 - Clapet creux et son procede de fabrication - Google Patents
Clapet creux et son procede de fabrication Download PDFInfo
- Publication number
- WO2000047876A1 WO2000047876A1 PCT/JP1999/000590 JP9900590W WO0047876A1 WO 2000047876 A1 WO2000047876 A1 WO 2000047876A1 JP 9900590 W JP9900590 W JP 9900590W WO 0047876 A1 WO0047876 A1 WO 0047876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cap
- opening edge
- hollow
- fillet region
- port valve
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims description 12
- 238000010894 electron beam technology Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 238000000137 annealing Methods 0.000 description 3
- 238000010622 cold drawing Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- F16K1/38—Valve members of conical shape
-
- 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
-
- 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
- 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
- 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
- F01L3/24—Safety means or accessories, not provided for in preceding sub- groups of this group
-
- 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
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0402—Cleaning, repairing, or assembling
- Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
-
- 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 hollow port valve for weight reduction and a method for manufacturing the same.
- the present invention relates to a hollow port 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 of manufacturing the same.
- a fillet region 4 that opens in a flared shape is formed at the end of a cylindrical stem portion 2, and a cap 6 is integrated with this fillet region 4 by welding. By doing so, a hollow poppet valve is configured.
- Reference numeral 7 indicates a weld.
- the face 6 is provided on the cap 6, and in the valve shown in FIG. 15, the face 8 is provided on the fillet region 4.
- HV Hardness
- FIGS. 16 and 17 show the hardness distribution in the longitudinal section near the cap welding portion 7 of the hollow poppet valve shown in FIGS. 14 and 15, and show the welded portion a and the area surrounding the welded portion a.
- the hardness is more than 20 OHV required as a valve, but the hardness at the weld a is 100 to 149 HV, and the weld a (The area surrounding the welded part a)
- the hardness of b is 150 to 199 HV, and in any structure, the hardness of the area almost half of the face 8 It is less than 200 HV, which is not enough for the market.
- FIG. 16 and 17 show the hardness distribution in the longitudinal section near the cap welding portion 7 of the hollow poppet valve shown in FIGS. 14 and 15, and show the welded portion a and the area surrounding the welded portion a.
- the hardness at the weld a is 100 to 149 HV
- the weld a The area surrounding the welded part a
- regions c to g with a hardness of 200 HV or more are regions with a hardness of 200 to 249 ⁇ 1 from a position near the welded portion a.
- the present invention has been made in view of the above-mentioned problems of the prior art, and has an object to achieve high strength-to-weight characteristics by preventing the influence of welding heat on the face surface and preventing stress from being concentrated on the welded portion.
- An object of the present invention is to provide a hollow port valve excellent in quality and a method for manufacturing the same. Disclosure of the invention
- a fillet region that opens in a flared shape is integrally formed at one end of a cylindrical stem portion, and the fillet region is provided.
- the opening edge of the fillet region is formed thicker than other regions, and a face surface is formed at the thick portion. It is configured as follows.
- the opening edge of the fillet area where the cap is to be welded is thicker than the other areas, and the effect of welding heat does not affect the face as much.
- the effect of welding heat on the face surface is avoided by increasing the thickness of the portion that may be affected by the welding heat when welding the cap (the opening edge of the fillet area), and the face surface is protected.
- the overall weight of the valve is reduced. Can be reduced.
- the welded portion of the cap and the face surface are at least 0.5 mm or more, preferably 0.8 mm. It is configured to be separated as described above. By keeping the face surface 0.5 mm or more, and preferably 0.8 mm away from the welded portion, the influence of welding heat on the face surface can be reliably avoided.
- the cap is welded by electron beam welding or laser beam welding.
- the beam diameter is small, so the width of the weld is small.
- the effect of welding heat on the use surface is also small.
- the thick wall portion has a vertical cross section at an opening edge portion of a fillet region. It is formed so as to be bent and formed in a U-shape, and to form the inside of the U-shaped bent portion in the vertical cross section in an R shape.
- the stress concentrates on the bent part, the stress is not concentrated on the welded part away from the bent part. Also, the inside of the bent portion has an R shape, and the stress concentrated on the bent portion is dispersed throughout the bent portion.
- the inner peripheral surface of the thick portion in the fillet region is provided with an inner peripheral surface of the stem portion.
- the face surface is constituted by a cylindrical surface centered on an axis, and the face surface is constituted by a tapered surface inclined in a range of 25 to 45 degrees with respect to the axis of the stem portion.
- a step for cap engagement is provided inside an opening edge of the fillet region. Is provided.
- the cap is positioned with respect to the fillet region by engaging the cap with the cap engaging step. That is, the step for cap engagement acts as a positioning member when the cap is welded to the fillet region.
- the step for cap engagement acts to reliably separate the welded portion from the stress concentration portion in the fillet region.
- the cap engaging step serves to support the cap from below and reduce the load acting on the weld due to the pressure acting on the flank side of the cap.
- a flange-shaped thick portion is formed at the opening edge of the cup-shaped molded product, and in the drawing process, a tapered face surface is formed at the opening edge of the fillet region of the molded product. It is configured to form a thick part.
- the cap is desirably welded by an electron beam or a laser beam.
- the draw forming step at least 0.5 mm or more, preferably 0 mm or more from the face inside the opening edge of the fillet region. It is desirable to form a step for cap engagement at a position separated by at least 8 mm.
- FIG. 1 is a partially cutaway front view of a hollow poppet valve according to an embodiment of the present invention
- FIG. 2 is an enlarged cross-sectional view around a cap weld
- FIG. 3 is a view showing a manufacturing process of the hollow poppet valve.
- Figure 4 shows the prototype material
- Figure 5 shows the prototype dimensions and weight.
- Fig. 6 shows the hardness distribution near the face of the prototype
- Fig. 7 shows the state of the tensile test
- Fig. 8 shows the result of the tensile test
- Fig. 9 shows the stress
- Fig. 10 shows the results of the concentration test
- Fig. 10 shows the results of the stress concentration test
- Fig. 11 shows the distribution of stress concentration in the longitudinal section of the prototype
- FIG. 12 shows the results of the fatigue test.
- FIG. 13 is an enlarged sectional view of a main part of a hollow bot valve according to another embodiment of the present invention
- FIG. 14 is a partially cutaway front view of a conventional hollow poppet valve
- FIG. FIG. 16 is a cross-sectional view of a main part of another conventional hollow port valve
- FIG. 16 is a diagram showing a hardness distribution in the vicinity of the face surface of the conventional hollow port valve shown in FIG. 14, and
- FIG. FIG. 16 is a diagram showing a hardness distribution near the face surface of the conventional hollow port valve shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 which is a partially cutaway front view of a hollow port valve according to an embodiment of the present invention
- FIG. 2 which is an enlarged sectional view around a cap welded portion
- reference numeral 10 denotes a hollow port valve.
- a flared fillet region 14 is formed at the upper end of the cylindrical stem portion 12 whose lower end is closed, and a face surface 15 is formed on the outer periphery of the fillet region 14.
- a disc-shaped cap 16 is integrated with the opening edge of the fillet region 14 by welding.
- Reference numeral 18 denotes a cotter groove provided on the outer periphery of the lower end of the stem portion 12.
- Reference numeral 19 denotes a chip provided at the lower end of the stem 12.
- Reference numeral 20 denotes a weld between the opening edge of the bullet region 14 and the cap 16.
- the cap 16 is curved upward with its center at the top, and has sufficient strength to sufficiently oppose the pressure acting on the fire-resistant side of the valve (cap 16) even if it is relatively thin.
- the cap 16 has a thickness of 7 mm at the thinnest central portion and a thickness of 12 mm at the thickest peripheral portion.
- a cap engaging step 14 a (see FIG. 4) having a depth corresponding to the thickness of the cap 16 is provided around the cap 16.
- Numeral 6 is welded while being carried on the step portion 14a.
- This step 14 a In addition to acting as a positioning portion when welding the caster 16 to the fillet region 14, the cap 16 is supported from below, and the cap 16 acts on the ignition surface side of the valve (cap 16). It works to reduce the load (stress) acting on the weld 20.
- the stem portion 12 is formed to have a substantially uniform thickness (0.5 mm) except for the fillet region 14.
- the fillet region 14 is formed so as to be gradually thicker toward the opening edge (upper part in FIG. 1), and the opening edge is formed to be the thickest.
- a face surface 15 is formed on the outer periphery of the thick portion 30 so that the face surface 15 is not affected by the cap welding heat.
- the thick portion 30 provided at the opening edge of the fillet region 14 bends and extends in a vertical cross-shape, and the inside 32 a of the bent portion 32 has an R shape. It is formed.
- the stress acting on the fillet region 14 due to the downward pulling of the stem portion 12 is concentrated on the bent portion 32, and the stress on the welded portion 20 away from the bent portion 32 is not so large. Stress is not concentrated.
- the inside 32 a of the bent portion is R-shaped, and the stress concentrated on the bent portion 32 is dispersed throughout the bent portion 32, resulting in a structure with excellent durability.
- the inner peripheral surface 31 of the thick portion 30 is formed of a cylindrical surface centered on the axis L of the stem portion 12, and the face 15 formed on the outer periphery of the thick portion 30 is
- the stem 12 is formed of a tapered surface inclined at about 45 degrees with respect to the axis L of the stem 12.
- the cap 16 is welded by electron beam welding or laser beam welding.
- electron beam welding or laser beam welding the beam diameter is small, so the width d2 of the welded portion 20 can be small, and welding can be performed instantaneously with high energy. Little effect.
- electron beam welding is superior to laser beam welding in that the effect of welding heat (softening of the structure) is small.
- laser beam welding without such restrictions is superior in terms of productivity. Therefore, it is preferable to use electron beam welding when importance is placed on reliability or a valve on which a large load acts, and when importance is placed on productivity, laser beam welding is preferred.
- a blank material ⁇ ⁇ is formed into a cup shape by cold pressing.
- the cold press forming step includes a step of squeezing the blank ⁇ ⁇ the cup, steps Toka et press forming the flange-like thick portion 3 0 a on the opening side of the cup-shaped molded product W 2 become. Annealing is performed as necessary to facilitate subsequent transfer press forming.
- a mandrel may be used as necessary. In principle, annealing is not performed. However, if molding is difficult due to hard material, intermediate annealing may be performed.
- a cotter groove 18 is formed at the lower end of the stem 12 by roll forming or the like.
- a cap 16 previously manufactured separately from the stem portion 12 is welded to the step portion 14a of the fillet region 14 by electron beam welding or laser beam welding.
- the prototype S I ⁇ S 5 in FIG. 5 is using materials shown in NO. 1 of the NO. 3 from NO. 1 in FIG. 4, prototype S 4, S For No. 5 , the material shown in NO. 2 was used.
- Figure 6 shows the hardness distribution near the face of the prototype.
- the hardness at the welded portion 20 indicated by the symbol A is softened to 100 to 149 HV
- the hardness of the portion B surrounding the welded portion A is 150 to 199 HV. Is also somewhat softened.
- the hardness of the outer parts C and D is 200 to 249 HV, 250 to 299 HV
- the outer part (the part where the face surface 15 is formed) E has a hardness of 300 to 349 HV.
- the values are 350 to 399 HV and 400 HV or more. That is, in the present embodiment, the cap welding portion 20 is separated from the face surface 15 by ⁇ .8 mm or more, so that the face surface 15 is less affected by the cap welding heat and the hardness of 300 to 349 HV is secured. .
- the hardness of the entire face surface 15 is maintained at 300 to 349 HV or more, and the hardness of the approximately half area of the face surface is 200 HV or less. (See 7).
- the test machine supported the face surface 15 from below by the die 40, and applied the axial force to the inside of the fillet region 14 by the punch 42. It is configured to work.
- the cap of the valve (prototype and conventional) has a circular hole 50 for applying an axial force.
- the prototype product breaks at the bent portion 32 where the maximum stress is concentrated in each case, and the load up to the fracture is large (about twice that of the conventional product).
- Fig. 11 When the stress distribution when the valve was seated was analyzed by the finite element method, the results shown in Fig. 11 were obtained. However, the conditions were calculated by simulating a sitting state in the bounce area and applying a force of 2500 N in the axial direction. As is clear from Fig. 11, a maximum principal stress of 3442 MPa (megapascal) is generated inside the thick part. If the same calculation is performed for the conventional product, a maximum principal stress of 665 Mpa occurs at almost the same place. This indicates that the maximum principal stress generated in the fillet region (valve head) can be reduced to about half by optimizing the shape in this example (prototype). The stress generated near the weld will be described.
- the maximum principal stress (665 Mpa) is the force generated in the vicinity of the weld (near the reference numeral 7 shown in Fig. 14).
- a main stress of 122 Mpa is generated near the weld. Therefore, from the viewpoint of reducing the stress near the weld, the prototype is safer than the conventional product.
- the prototype was subjected to a fatigue test in which a load was applied repeatedly in the axial direction using the testing machine shown in Fig. 7, and the results shown in Fig. 12 were obtained.
- the prototype While the conventional product wears the face surface and is inferior in durability, the prototype has a surface hardness of 300 to 349 HV (see Fig. 6). However, the stress concentration is dispersed to some extent at the bent portion 32, and the effect of the stress concentration does not affect the welded portion 20 away from the bent portion 32 (see FIG. 11). It was also confirmed that the prototype was excellent in terms of durability. In particular, the fatigue life strength in the low load range is extremely high.
- the prototype when the prototype was evaluated using an automobile gasoline engine, it was confirmed that the prototype could withstand more than twice the rotational speed of the conventional product, that is, it had excellent durability.
- a step 14a for engaging the cap is formed inside the thick part 30 provided at the opening edge of the fillet region 14, and the step 14a is keyed.
- the gap 16 was welded, as shown in FIG. 13, the entire inner peripheral surface 31 of the thick portion 30 was formed by a tapered surface inclined with respect to the axis L of the stem 12.
- the cap 16 may be welded to the thick portion 30 without the step portion 14a.
- the face surface 15 is formed by a taper surface inclined at approximately 45 degrees with respect to the stem portion 12 axis L, but the inclination is limited to 45 degrees. Instead, it may be in the range of 25 degrees to 45 degrees.
- the thickness of the central portion of the cap 16 is 7 mm, and the thickness of the peripheral portion of the cap and the depth of the step portion 14a supporting the cap 16 are 12 mm.
- the present invention is not limited to this.
- the tip portion 19 at the lower end of the stem portion is formed integrally with the stem portion main body.
- a portion below a predetermined position above or below the cotter groove 18 is used as the tip portion and the stem portion is formed.
- the structure may be formed separately from the main body, and the tip may be joined and integrated with the lower end of the stem main body.
- the hollow poppet valve according to the present invention can maintain the face surface at a required hardness because the influence of welding heat upon welding the cap does not affect the face surface. This is suitable for increasing the strength and reducing the weight of a hollow valve (improving high strength-to-weight characteristics), since stress concentration on welds is avoided.
- the influence of welding heat on the face surface can be reliably avoided, so that a further increase in strength and weight of the hollow valve can be achieved.
- the welded portion is inconspicuous, the appearance as a product is good, and the effect of welding heat on the face surface is small, so that the strength and weight of the hollow valve can be further increased. Can be achieved.
- the weld since stress is not concentrated on a weld having a low hardness, the weld is not broken at the weld and the durability is improved accordingly.
- the method for manufacturing a hollow port valve according to claim 7 is suitable for easily manufacturing a hollow valve having high strength-to-weight characteristics.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Laser Beam Processing (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007009249A KR20010106093A (ko) | 1999-02-12 | 1999-02-12 | 중공 버섯형밸브 및 그 제조방법 |
PCT/JP1999/000590 WO2000047876A1 (fr) | 1999-02-12 | 1999-02-12 | Clapet creux et son procede de fabrication |
JP2000598755A JP3884912B2 (ja) | 1999-02-12 | 1999-02-12 | 中空ポペットバルブおよびその製造方法 |
EP19990905194 EP1152127B1 (en) | 1999-02-12 | 1999-02-12 | Hollow poppet valve and its manufacturing method |
US09/582,205 US6378543B1 (en) | 1999-02-12 | 1999-02-12 | Hollow poppet valve and the method for manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1999/000590 WO2000047876A1 (fr) | 1999-02-12 | 1999-02-12 | Clapet creux et son procede de fabrication |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/003,202 Division US6679478B2 (en) | 2000-07-17 | 2001-12-06 | Hollow poppet valve and method for manufacturing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000047876A1 true WO2000047876A1 (fr) | 2000-08-17 |
Family
ID=14234910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/000590 WO2000047876A1 (fr) | 1999-02-12 | 1999-02-12 | Clapet creux et son procede de fabrication |
Country Status (5)
Country | Link |
---|---|
US (1) | US6378543B1 (ja) |
EP (1) | EP1152127B1 (ja) |
JP (1) | JP3884912B2 (ja) |
KR (1) | KR20010106093A (ja) |
WO (1) | WO2000047876A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007057946A1 (ja) | 2005-11-15 | 2007-05-24 | Nittan Valve Co., Ltd. | 冷媒入り中空ポペットバルブおよびその製造方法 |
US7556011B2 (en) | 2006-06-06 | 2009-07-07 | Suncall Corporation | Valve structure for internal combustion |
JPWO2010041337A1 (ja) * | 2008-10-10 | 2012-03-01 | 日鍛バルブ株式会社 | 中空ポペットバルブおよびその製造方法 |
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 (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6679478B2 (en) * | 2000-07-17 | 2004-01-20 | Nittan Valve Co., Ltd. | Hollow poppet valve and method for manufacturing 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 |
DE102013203441A1 (de) * | 2013-02-28 | 2014-08-28 | Bayerische Motoren Werke Aktiengesellschaft | Betriebsverfahren für ein einachsiges Wankstabilisierungssystem eines zweiachsigen, zweispurigen Fahrzeugs |
DK177960B1 (en) | 2014-04-08 | 2015-02-02 | Man Diesel & Turbo Deutschland | An exhaust valve for an internal combustion engine |
CN104929719B (zh) * | 2015-05-11 | 2017-11-28 | 怀集登云汽配股份有限公司 | 一种基于楔横轧制坯的中空充钠气门 |
CN104791040B (zh) * | 2015-05-11 | 2017-10-27 | 怀集登云汽配股份有限公司 | 一种中空充钠气门 |
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-
1999
- 1999-02-12 US US09/582,205 patent/US6378543B1/en not_active Expired - Lifetime
- 1999-02-12 EP EP19990905194 patent/EP1152127B1/en not_active Expired - Lifetime
- 1999-02-12 WO PCT/JP1999/000590 patent/WO2000047876A1/ja not_active Application Discontinuation
- 1999-02-12 KR KR1020007009249A patent/KR20010106093A/ko active Search and Examination
- 1999-02-12 JP JP2000598755A patent/JP3884912B2/ja not_active Expired - Fee Related
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FR971380A (fr) | 1940-04-24 | 1951-01-16 | Perfectionnements apportés à la fabrication des soupapes creuses | |
US2636255A (en) | 1950-01-28 | 1953-04-28 | Jeudy Gabriel Jeudi Dit | Process for the production of hollow valves |
EP0091097A1 (en) | 1982-04-05 | 1983-10-12 | Nissan Motor Co., Ltd. | Engine valve and method of producing the same |
JPS6184347A (ja) * | 1984-09-25 | 1986-04-28 | Honda Motor Co Ltd | 内燃機関用中空弁 |
JPS63109207A (ja) * | 1986-10-28 | 1988-05-13 | Fuji Valve Co Ltd | 中空エンジンバルブの製造方法 |
JPH02124204U (ja) * | 1989-03-23 | 1990-10-12 | ||
JPH06299816A (ja) * | 1993-04-01 | 1994-10-25 | Eaton Corp | 超軽量のポペットバルブおよびその製造方法 |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007057946A1 (ja) | 2005-11-15 | 2007-05-24 | Nittan Valve Co., Ltd. | 冷媒入り中空ポペットバルブおよびその製造方法 |
JPWO2007057946A1 (ja) * | 2005-11-15 | 2009-04-30 | 日鍛バルブ株式会社 | 冷媒入り中空ポペットバルブおよびその製造方法 |
JP4871293B2 (ja) * | 2005-11-15 | 2012-02-08 | 日鍛バルブ株式会社 | 冷媒入り中空ポペットバルブおよびその製造方法 |
US7556011B2 (en) | 2006-06-06 | 2009-07-07 | Suncall Corporation | Valve structure for internal combustion |
JPWO2010041337A1 (ja) * | 2008-10-10 | 2012-03-01 | 日鍛バルブ株式会社 | 中空ポペットバルブおよびその製造方法 |
US8230834B2 (en) | 2008-10-10 | 2012-07-31 | Nittan Valve Co., Ltd. | Hollow poppet valve and method of manufacturing the same |
JP5148609B2 (ja) * | 2008-10-10 | 2013-02-20 | 日鍛バルブ株式会社 | 中空ポペットバルブおよびその製造方法 |
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 |
---|---|
KR20010106093A (ko) | 2001-11-29 |
EP1152127A1 (en) | 2001-11-07 |
JP3884912B2 (ja) | 2007-02-21 |
US6378543B1 (en) | 2002-04-30 |
EP1152127B1 (en) | 2011-09-07 |
EP1152127A4 (en) | 2009-07-22 |
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