JUNCTION STRUCTURE, AND HIGH PRESSURE FUEL SUPPLY PUMP WITH JUNCTION STRUCTURE

To provide a junction structure or a high pressure fuel supply pump that is enabled to suppress deformation due to a heat treatment, or made to hardly cause welding high-temperature cracking to have improved reliability.SOLUTION: In a junction structure which has a joining member and a joined member...

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Bibliographic Details
Main Author MUNAKATA AKIHIRO
Format Patent
LanguageEnglish
Japanese
Published 16.04.2020
Subjects
BLASTING
CLADDING OR PLATING BY SOLDERING OR WELDING
COMBUSTION ENGINES
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MACHINE TOOLS
MECHANICAL ENGINEERING
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
TRANSPORTING
WEAPONS
WELDING
WORKING BY LASER BEAM
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Summary:To provide a junction structure or a high pressure fuel supply pump that is enabled to suppress deformation due to a heat treatment, or made to hardly cause welding high-temperature cracking to have improved reliability.SOLUTION: In a junction structure which has a joining member and a joined member of austenitic stainless steel joined by laser welding, at least one of the joining member and joined member is a member to be subjected to a heat treatment, and materials of the joining member and joined member have Md 30 meeting a condition of -20°C≤Md30≤-2.0°C. Further, a high pressure fuel supply pump comprises a pump body 1 which has a dumper chamber 10 having a pulse absorption damper 9 accommodated and a dumper cover 14 covering the dumper chamber 10, one of the joining member and joined member is composed of the dumper cover 14, and the other is composed of the pump main body 1, the dumper cover 14 and pump body 1 being pressed in and welded to be joined together.SELECTED DRAWING: Figure 2 【課題】本発明の目的は、熱処理による変形を抑制することができるようにする、或いは溶接高温割れを生じ難いようにして信頼性を高めた接合構造又は高圧燃料供給ポンプを提供することにある。【解決手段】オーステナイト系ステンレスの接合部材及び被接合部材がレーザー溶接によって接合される接合構造において、接合部材及び被接合部材のうち少なくともいずれか一方の部材が熱処理を施される部材であり、接合部材及び被接合部材の材料のＭｄ３０が−２０℃≦Ｍｄ３０≦−２．０℃の条件を満たす。さらに高圧燃料供給ポンプにおいて、脈動吸収ダンパ９を収めたダンパ室１０を有するポンプ本体１とダンパ室１０を覆うダンパカバー１４とを備え、接合部材又は被接合部材の一方がダンパカバー１４により構成され、他方がポンプ本体１により構成され、ダンパカバー１４とポンプ本体１とは圧入されて溶接接合される。【選択図】図２
Bibliography:Application Number: JP20180190120