WO2023090373A1 - 接続頭部を有するステンレス製燃料配管およびその接続頭部の表層軟化処理方法 - Google Patents

接続頭部を有するステンレス製燃料配管およびその接続頭部の表層軟化処理方法 Download PDF

Info

Publication number
WO2023090373A1
WO2023090373A1 PCT/JP2022/042601 JP2022042601W WO2023090373A1 WO 2023090373 A1 WO2023090373 A1 WO 2023090373A1 JP 2022042601 W JP2022042601 W JP 2022042601W WO 2023090373 A1 WO2023090373 A1 WO 2023090373A1
Authority
WO
WIPO (PCT)
Prior art keywords
stainless steel
softening
surface layer
fuel pipe
pipe
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.)
Ceased
Application number
PCT/JP2022/042601
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
晃一朗 長島
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.)
Usui Co Ltd
Original Assignee
Usui Co Ltd
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 Usui Co Ltd filed Critical Usui Co Ltd
Priority to KR1020247018039A priority Critical patent/KR20240091206A/ko
Priority to CN202280075905.8A priority patent/CN118251544A/zh
Priority to JP2023562389A priority patent/JPWO2023090373A1/ja
Priority to EP22895654.6A priority patent/EP4435249A4/en
Priority to US18/710,605 priority patent/US20250019792A1/en
Publication of WO2023090373A1 publication Critical patent/WO2023090373A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/14—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/355—Texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/362—Laser etching
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties

Definitions

  • the present invention relates to stainless steel fuel pipes used, for example, as fuel supply paths in internal combustion engines, and high-pressure hydrogen gas pipes used in fuel cells, etc.
  • the present invention relates to a connection head formed at a pipe end by press working or the like. and a method for softening the connection head of the pipe end.
  • a fuel injection conduit (fuel injection pipe) having a connecting head used for a fuel supply path or the like in an internal combustion engine
  • This fuel injection conduit has, for example, at least one end thereof provided with a conical portion for sealing by pressing the punch member in the axial direction of the pipe, and has a connection head formed by upsetting. Piping is known (see Patent Documents 1, 2, etc.).
  • a fuel pipe for an internal combustion engine as illustrated in FIG.
  • a stainless steel fuel pipe having a connection head 110 consisting of an annular flange portion 114 provided and a sealing surface (sealing conical surface) 113 that continues to the pipe end surface 112 and tapers toward the tip to the annular flange portion 114. It has been known.
  • the present invention is intended to solve the following problems, particularly in stainless steel fuel lines. That is, in the case of a stainless steel fuel pipe, if sufficient axial force cannot be obtained due to co-rotation when fastening the pipe, if the hardness of the seal surface (conical surface for sealing) is high, the contact surface of the seal surface will be reduced. There is a risk that the sealability cannot be ensured because it cannot be deformed to follow the other party. In other words, if the sealing surface is softened, the contact surface is likely to be plastically deformed so as to conform to the mating member, and the sealing performance at a relatively low torque is improved. The entire fastening portion is inevitably deformed during repeated tightening assuming that the pipe is attached and detached for inspection, etc., and a problem arises in that the sealing performance cannot be ensured.
  • the present invention has been made to solve the above-described problems, particularly in stainless steel fuel pipes and manufacturing methods thereof.
  • the purpose is to make a proposal.
  • a stainless steel fuel pipe having a connection head according to the present invention is a stainless steel fuel pipe in which a connection head having a truncated cone-shaped or truncated arc-shaped seal surface is formed at the connection end of a thick steel pipe having a small diameter.
  • the surface layer of the sealing surface of the connection head is subjected to a softening heat treatment to a predetermined hardness.
  • heat treatment is performed by irradiating a desired sealing surface portion of the connection head with a laser to generate heat energy on the sealing surface surface layer, and the sealing is performed. It is characterized by subjecting only the surface layer to a softening heat treatment to a predetermined hardness.
  • a labyrinth structure having an uneven pattern is formed on the sealing surface surface layer with a laser, and the uneven pattern part of the labyrinth structure and its vicinity are heated by laser processing. It is characterized by subjecting only the surface layer of the sealing surface to softening heat treatment to a predetermined hardness.
  • the range of softening heat treatment to a predetermined hardness is 0.35 mm to 0.65 D (D: the outer diameter of the stainless steel fuel pipe) from the end of the sealing surface, and the depth from the sealing surface.
  • D the outer diameter of the stainless steel fuel pipe
  • a thickness of 0.05 mm or more and a thickness of half or less is preferable.
  • the hardness of the portion subjected to the softening heat treatment has a difference lower than the hardness of the connection head before softening by 50 HV or more.
  • the stainless steel fuel pipe has a thickness t of 0.125 to 0.27D, a radius R of the seal spherical surface of 0.51 to 0.65D, and a distance from the end face to the maximum expanded pipe portion.
  • a pipe having H of 0.5 to 0.7D and a diameter W of the maximum expanded portion of 1.25 to 1.5D can be used.
  • heat energy is generated in the sealing surface layer by irradiating the surface layer of the sealing surface in the stainless steel fuel pipe in which the connection head is formed at the connection end of the thick steel pipe.
  • the softening heat treatment is performed to the desired hardness, so that the deformation of the mating part during tightening of the seal can be alleviated and large deformation can be prevented, thereby ensuring the sealing performance.
  • the surface layer of the sealing surface is softened to a predetermined hardness, deformation of the entire fastening portion can be suppressed when fastening multiple times, and sealing performance can be ensured.
  • the sealing surface surface layer not only can the hardness of chromium be adjusted, but because only the end seal surface is cooled, quenching is possible with its own heat capacity, which is a material deterioration phenomenon peculiar to stainless steel, sensitization, that is, chromium carbide precipitates on the crystal grain boundary in the structure. It is also possible to prevent the formation of a depleted layer and the phenomena that indicate the enlarged texture of crystals.
  • a method for softening heat treatment of the seal surface surface layer to a predetermined hardness is adopted, and as the softening heat treatment method, the seal surface is irradiated with a laser.
  • the same effect as described above can be obtained by applying a softening heat treatment to the uneven pattern portion of the formed labyrinth structure and its vicinity to a predetermined hardness.
  • the stainless steel fuel pipe shown in FIG. 1 is structurally similar to the conventional stainless steel fuel pipe shown in FIG. a pipe end surface (pressing surface) 12, an annular flange portion 14 provided at a distance from the pipe end surface 12 in the pipe axial direction, and the pipe end surface 12 continues to the annular flange portion 14 and tapers toward the tip. It has a structure having a connection head 10 consisting of a sealing surface 13 that becomes. In this stainless steel fuel pipe, the entire periphery of the hatched portion 13-1 of the sealing surface 13 of the connection head 10, for example, is subjected to softening heat treatment to a predetermined hardness by laser irradiation.
  • the reason why the softening heat treatment to the predetermined hardness is limited to the portion of the sealing surface 13 of the connecting head 10 is that when the sealing surface 13 is softened, the contact surface is plastically deformed so as to conform to the counterpart.
  • the entire fastening portion of the fuel pipe is softened, the entire fastening portion will inevitably deform when repeatedly tightened, resulting in a problem that the sealing performance cannot be ensured. Because.
  • the end of the sealing surface is crushed and leakage is unavoidable. It is possible to suppress the occurrence of leakage even at the time of rotation fastening.
  • the stainless steel fuel pipe shown in FIG. 2 does not have the annular flange portion 14 shown in FIG. 22, an arc-shaped portion 24 connected to the back surface of the pipe end face and smoothly decreasing in outer diameter in the pipe axial direction, and the pipe end face 22 to the thick steel pipe 21 side. It has a structure having a connection head 20 consisting of a sealing surface 23 tapered toward the tip. A softening heat treatment is applied to a predetermined hardness by irradiation.
  • the stainless steel fuel pipe shown in FIG. 3 does not have the annular flange portion 14 shown in FIG. an arcuate portion 34 extending from the rear surface side of the pipe end face to the rear surface thereof and smoothly decreasing in outer diameter in the direction of the pipe axis;
  • a structure having a connection head 30 consisting of a sealing surface 33 tapered toward the tip is formed, and a hatched portion 33-1 of the sealing surface 33 is a range for softening heat treatment. It is heat treated to soften to hardness.
  • the stainless steel fuel pipe shown in FIG. 4 does not have the annular flange portion 14 shown in FIG. 42, an arcuate portion 44 extending from the rear surface side of the pipe end face to the rear surface thereof and smoothly decreasing in outer diameter in the pipe axial direction, and continuing to the pipe end face 42 to the thick steel pipe 41 side.
  • a structure having a connection head 40 consisting of a sealing surface 43 tapered toward the tip is formed, and a hatched portion 43-1 of the sealing surface 43 is a range for softening heat treatment. It is heat treated to soften to hardness.
  • the surface layer of the sealing surface is subjected to softening heat treatment by laser irradiation to a predetermined hardness, and rapid cooling is possible with its own heat capacity for appropriate heat input and cooling to the terminal sealing surface.
  • sensitization which is a material deterioration phenomenon peculiar to stainless steel, so that the deformation of the mating part when tightening the seal can be alleviated and large deformation can be prevented, thereby ensuring the sealing performance.
  • the surface layer of the sealing surface is softened to a specified hardness, the hardness of the inner surface of the pipe is maintained. There is an effect that the sealability can be secured at the time of rotation fastening.
  • the method for softening the surface layer of the end of the stainless steel fuel pipe according to the present invention includes the sealing surfaces 13, 23, 33, At 43, as shown in FIGS. 5(A) and 5(B), a labyrinth groove 50 is formed simultaneously with a softening treatment by laser processing to form a labyrinth structure that is softened and heat-treated on the sealing surface.
  • the groove width, groove depth, and groove pitch of the labyrinth grooves formed by this laser processing are, for example, 43 ⁇ m, 10 ⁇ m, and 100 ⁇ m (the peak width is 57 ⁇ m), respectively. Due to this labyrinth structure, the surface layer of the sealing surface is softened, and a sealing surface having a lower hardness than before softening can be obtained in the mating part sealing portion and the connecting head.
  • the hardness of the seal surface having the labyrinth structure may be adjusted by heating and cooling the seal surface after the formation of the labyrinth structure, or may be adjusted by subjecting the seal surface to a softening heat treatment prior to forming the labyrinth structure. can.
  • a labyrinth seal structure is formed on the seal surface surface layer by a laser as a method for softening the surface layer of the seal surface of the connection head as described above, and this labyrinth structure is obtained. Therefore, it is possible to adopt a method of softening only the sealing surface surface layer to a predetermined hardness, so not only can the hardness of the work-hardened terminal sealing surface side surface layer be adjusted accurately, but also the appropriate input to the terminal sealing surface can be adopted. It is possible to prevent sensitization, which is a material deterioration phenomenon peculiar to stainless steel, by being able to perform rapid cooling with its own heat capacity for heat and cooling.
  • the range of softening heat treatment to a predetermined hardness is not particularly limited, but 0.35 mm to 0.65 D (D : outer diameter of stainless steel fuel pipe), the depth from the sealing surface is 0.05 mm or more, and the thickness is preferably half or less. Moreover, it is preferable that the hardness of the portion subjected to the softening heat treatment has a difference lower than the hardness of the connection head before softening by 50 HV or more. Furthermore, as a stainless steel fuel pipe, as shown in FIG. A pipe having H of 0.5 to 0.7D and a diameter W of the maximum expanded portion of 1.25 to 1.5D can be used.
  • the outer diameter D 6.35 mm
  • the inner diameter d 3.05 mm
  • the wall thickness t 1.65 mm
  • the radius R of the sealing spherical surface after terminal processing 4 mm
  • the distance from the end surface to the maximum expanded pipe portion H 3
  • the surface layer of the sealing surface of the connection end of the tube was subjected to softening heat treatment to a predetermined hardness by laser irradiation.
  • the range of the softening heat treatment was 0.5 mm from the edge of the sealing surface, the depth from the sealing surface was less than half the thickness from the surface layer, and the hardness HV was 169 to 252 HV.
  • Table 1 shows the results of the softening heat treatment test of the connection ends of the stainless steel pipe materials in this example
  • Table 2 shows the results of the tightening seal test for confirming the presence or absence of leakage when pressurized at 105 MPa.
  • the range of the softening heat treatment to a predetermined hardness is preferably 0.35 mm to 0.65 D from the end of the sealing surface, a depth of 0.05 mm or more from each sealing surface, and a half thickness or less, as described above.
  • the hardness of the softening heat-treated portion it is preferable that there is a difference of 50 HV or more lower than the hardness of the connection head before softening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
PCT/JP2022/042601 2021-11-16 2022-11-16 接続頭部を有するステンレス製燃料配管およびその接続頭部の表層軟化処理方法 Ceased WO2023090373A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020247018039A KR20240091206A (ko) 2021-11-16 2022-11-16 접속 헤드부를 갖는 스테인리스제 연료 배관 및 그 접속 헤드부의 표층 연화 처리 방법
CN202280075905.8A CN118251544A (zh) 2021-11-16 2022-11-16 具有连接头部的不锈钢制燃料配管及其连接头部的表层软化处理方法
JP2023562389A JPWO2023090373A1 (https=) 2021-11-16 2022-11-16
EP22895654.6A EP4435249A4 (en) 2021-11-16 2022-11-16 STAINLESS STEEL FUEL PIPE HAVING A FITTING HEAD, AND A METHOD FOR SOFTENING A SURFACE LAYER OF SAID FITTING HEAD
US18/710,605 US20250019792A1 (en) 2021-11-16 2022-11-16 Stainless steel fuel pipe having connecting head portion, and treatment method for softening surface layer of said connecting head portion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021186548 2021-11-16
JP2021-186548 2021-11-16

Publications (1)

Publication Number Publication Date
WO2023090373A1 true WO2023090373A1 (ja) 2023-05-25

Family

ID=86397095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/042601 Ceased WO2023090373A1 (ja) 2021-11-16 2022-11-16 接続頭部を有するステンレス製燃料配管およびその接続頭部の表層軟化処理方法

Country Status (6)

Country Link
US (1) US20250019792A1 (https=)
EP (1) EP4435249A4 (https=)
JP (1) JPWO2023090373A1 (https=)
KR (1) KR20240091206A (https=)
CN (1) CN118251544A (https=)
WO (1) WO2023090373A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1068367A (ja) * 1996-08-28 1998-03-10 Usui Internatl Ind Co Ltd 高圧燃料噴射管の接続頭部構造
JP2003021018A (ja) * 2001-07-09 2003-01-24 Bosch Automotive Systems Corp レールと噴射管の接続装置
JP2007332953A (ja) * 2006-03-14 2007-12-27 Usui Kokusai Sangyo Kaisha Ltd 接続頭部と曲げ部を有する高圧用燃料噴射管およびその製造方法
US20110315122A1 (en) * 2010-06-24 2011-12-29 Gm Global Technology Operations, Inc. Engine assembly including fuel system with fuel line connector
JP2015117771A (ja) * 2013-12-18 2015-06-25 株式会社Fts 樹脂と金属のシール構造

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189566A (en) * 1937-12-30 1940-02-06 Patex Sa Coupling for tubes and pipes
US2439351A (en) * 1944-01-03 1948-04-06 Dow Chemical Co Plastic tube fitting
US2748463A (en) * 1949-09-22 1956-06-05 Mueller Co Method of coupling pipes
DE3801703C1 (https=) 1988-01-21 1989-02-09 Juergen Dipl.-Ing. 8402 Neutraubling De Guido
US5529349A (en) * 1993-08-25 1996-06-25 Itt Corporation Mounting apparatus with reduced resistance bead seal
US6357801B1 (en) * 1998-12-28 2002-03-19 Usui Kokosai Sangyo Kaisha Limited Flared connection structure of pipe end portion
JP4854548B2 (ja) * 2006-03-14 2012-01-18 臼井国際産業株式会社 接続頭部と曲げ部を有する高圧用燃料噴射管およびその製造方法
ITVR20080068A1 (it) * 2008-06-11 2009-12-12 Chesini Meccanica Srl Procedimento per l'ottenimento di un condotto di alimentazione carburante ad un motore
US20100084856A1 (en) * 2008-10-08 2010-04-08 Gm Global Technology Operations, Inc. High Pressure Fluid Connection
US8322004B2 (en) * 2009-04-29 2012-12-04 Caterpilar Inc. Indirect laser induced residual stress in a fuel system component and fuel system using same
DE102013004169A1 (de) * 2013-03-09 2014-04-17 Daimler Ag Verfahren zum Bearbeiten einer Oberfläche eines Metallbauteils
WO2015132056A1 (de) * 2014-03-03 2015-09-11 Siemens Aktiengesellschaft Konusverschraubung für eine brennstoffleitung
CA2875512C (en) * 2014-12-18 2015-12-08 Westport Power Inc. Sealing structure for gaseous fuel
US10479339B2 (en) * 2016-01-19 2019-11-19 Ford Global Technologies, Llc Flare-type brake line assembly and method of making the same
DE102018217595A1 (de) * 2018-10-15 2020-04-16 Continental Automotive Gmbh Kraftstoffinjektor sowie Verfahren zum Herstellen eines Düsenkörpers für einen Kraftstoffinjektor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1068367A (ja) * 1996-08-28 1998-03-10 Usui Internatl Ind Co Ltd 高圧燃料噴射管の接続頭部構造
JP2003021018A (ja) * 2001-07-09 2003-01-24 Bosch Automotive Systems Corp レールと噴射管の接続装置
JP2007332953A (ja) * 2006-03-14 2007-12-27 Usui Kokusai Sangyo Kaisha Ltd 接続頭部と曲げ部を有する高圧用燃料噴射管およびその製造方法
US20110315122A1 (en) * 2010-06-24 2011-12-29 Gm Global Technology Operations, Inc. Engine assembly including fuel system with fuel line connector
JP2015117771A (ja) * 2013-12-18 2015-06-25 株式会社Fts 樹脂と金属のシール構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4435249A4 *

Also Published As

Publication number Publication date
JPWO2023090373A1 (https=) 2023-05-25
CN118251544A (zh) 2024-06-25
US20250019792A1 (en) 2025-01-16
KR20240091206A (ko) 2024-06-21
EP4435249A1 (en) 2024-09-25
EP4435249A4 (en) 2025-11-05

Similar Documents

Publication Publication Date Title
CN104185721B (zh) 提升阀工作部的形成方法和工作部由该方法形成的提升阀
JP2012117095A (ja) 鋳鉄材料の疲労強度向上方法
US20030011143A1 (en) Metallic gasket for vacuum device and method of producing thereof
JP5953272B2 (ja) ボイラ用メンブレンパネルの溶接部の予防保全補修方法
EP1927668A2 (en) Restoration method for deteriorated part and restoration apparatus for deteriorated part
CN100379883C (zh) 用超声波冲击处理提高冷加工部的强度的方法及金属制品
JPH02247085A (ja) 厚肉細径燃料噴射管及びその製造方法
WO2023090373A1 (ja) 接続頭部を有するステンレス製燃料配管およびその接続頭部の表層軟化処理方法
CN101784682B (zh) 劣化部位的修复方法
JP4551462B2 (ja) ルーズフランジ式フレア管継手のシール性改善方法、フレア部端面角度制御方法、ルーズフランジ式フレア管継手、ルーズフランジ式フレア管継手用鋼管、ルーズフランジ式フレア管継手用鋼管の製造方法及び鋼管の接合方法
CN110328298B (zh) 一种不锈钢小管径薄壁管件扩口成形的加工方法
JPWO2023090373A5 (https=)
JP6434729B2 (ja) Ｎｉ基系合金の管の製造方法、Ｎｉ基系合金の高周波加熱曲げ管の製造方法、Ｎｉ基系合金の溶接接合管の製造方法およびボイラ用の蒸気管の製造方法
JP2005088048A (ja) 配管継手用溶接歪吸収フランジおよび配管継手
CN112192152A (zh) 一种环形曲面钛合金工件及其焊接方法
JP2007332955A (ja) 接続頭部と曲げ部を有する高圧用燃料噴射管およびその製造方法
JP7493737B1 (ja) 半割管継手の製造方法
CN113649720A (zh) 一种钛铝合金涡轮与钢轴的复合连接方法
JP6503209B2 (ja) 圧入接合による接合品の製造方法
WO2012147439A1 (ja) 微細フェライト粒界析出型マルテンサイト組織を有する鋼製品及びその製造方法
JP5384416B2 (ja) ルーズフランジ式フレア管継手、ルーズフランジ式フレア管継手用鋼管、ルーズフランジ式フレア管継手用鋼管の製造方法及び鋼管の接合方法
JP2023085245A (ja) メタルコンタクトによるシール構造
JP7156541B2 (ja) 接合継手、自動車用部材、及び接合継手の製造方法
JP2001165318A (ja) ガスケットのシム部の製造方法
CN108486343A (zh) 一种低碳钢管状铆钉加工方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22895654

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2023562389

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 18710605

Country of ref document: US

Ref document number: 202280075905.8

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 202447039258

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 20247018039

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2022895654

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022895654

Country of ref document: EP

Effective date: 20240617