METHOD FOR MANUFACTURING PULLEY SHAFT WITH PARKING GEAR

PROBLEM TO BE SOLVED: To prevent an occurrence of a burr on a parking gear part 23 which has been roughly shaped.SOLUTION: A method for manufacturing a fixed pulley 2 with a parking gear in which a parking gear part 23 is integrally formed comprises: first steps (step S101 and step S102) of, by hot...

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Bibliographic Details
Main Authors TSUDA SATOHIKO, MATSUMOTO NORIYUKI, OSHIMA SHUNSUKE
Format Patent
LanguageEnglish
Japanese
Published 25.01.2018
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
FORGE FURNACES
FORGING
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HAMMERING
HEATING
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
THERMAL INSULATION IN GENERAL
TRANSPORTING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To prevent an occurrence of a burr on a parking gear part 23 which has been roughly shaped.SOLUTION: A method for manufacturing a fixed pulley 2 with a parking gear in which a parking gear part 23 is integrally formed comprises: first steps (step S101 and step S102) of, by hot forging of a rod-like raw material 4, shaping a main part of the fixed pulley 2 having a shaft part 21 and a sheave part 22; a second step (step S103) of, by hot forging of an intermediate raw material 4B obtained in the first step, roughly shaping the parking gear part 23 on a back side of the sheave part 22; and a third step (step S104) of, by cold forging of an intermediate raw material 4C obtained in the second step, shaping the parking gear part 23. A third forging die 7 used in the second step is formed of a material having a higher softening temperature than those of dies (a first forging die 5 and a second forging die 6) used in the first step.SELECTED DRAWING: Figure 2 【課題】粗造形されたパーキングギヤ部２３でのバリの発生を防止する。【解決手段】パーキングギヤ部２３が一体に形成されたパーキングギヤ付き固定プーリ２の製造方法であって、棒状の素材４の熱間鍛造により、シャフト部２１とシーブ部２２とを有する固定プーリ２の主要部を造形する第１工程（ステップＳ１０１、ステップＳ１０２）と、第１工程で得られた中間素材４Ｂの熱間鍛造により、シーブ部２２の裏側にパーキングギヤ部２３を粗造形する第２工程（ステップＳ１０３）と、第２工程で得られた中間素材４Ｃの冷間鍛造により、パーキングギヤ部２３を造形する第３工程（ステップＳ１０４）と、を有し、第２工程で使用する第３鍛造金型７は、第１工程で使用する金型（第１鍛造金型５、第２鍛造金型６）よりも軟化温度が高い材料で形成したものである構成とした。【選択図】図２
Bibliography:Application Number: JP20160142880