METHOD FOR MANUFACTURING PIPING COMPONENT

• Main Authors: ISHIGURO KENJI, WATANABE YUKIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2018
• Subjects: BLASTING; COMBUSTION ENGINES; FORGE FURNACES; FORGING; HAMMERING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for manufacturing a piping component which suppresses a damage by concentration of stress.SOLUTION: A method for manufacturing a common rail (piping component) having a central flow channel and a branch flow channel branched from the central flow channel formed therein includes a forging step and a removal step. The forging step includes forging a base material 50 having a solid rod shape to mold a forged product 60. The forged product 60 has a central forged part 61 being a portion corresponding to a central piping part, a branch forged part 62 being a portion corresponding to a branch piping part, and a dummy forged part 63. The dummy forged part 63 has a shape projecting from the central forged part 61, and is positioned on an opposite side to the branch forged part 62 with respect to the central forged part 61. The removal step includes removing the dummy forged part 63 from the forged part 60.SELECTED DRAWING: Figure 4 【課題】応力集中による損傷の抑制を図った配管部品の製造方法を提供する。【解決手段】中央流路および中央流路から分岐する分岐流路が内部に形成されたコモンレール（配管部品）の製造方法は、鍛造工程および除去工程を備える。鍛造工程では、中実棒状の母材５０を鍛造して鍛造品６０を成形する。鍛造品６０は、中央配管部に相当する部分である中央鍛造部６１、分岐配管部に相当する部分である分岐鍛造部６２、およびダミー鍛造部６３を有する。ダミー鍛造部６３は、中央鍛造部６１から突出する形状であり、中央鍛造部６１に対して分岐鍛造部６２の反対側に位置する。除去工程では、鍛造品６０からダミー鍛造部６３を除去する。【選択図】図４