The present invention relates to a method to process a bicycle shaft and, more specifically, to a method to process a bicycle shaft, capable of enabling mass production and saving processing costs by forcibly extruding the bicycle shaft in a mold without turning the shaft. A Ø17.90 rod-shaped material for processing the bicycle shaft is forcibly extruded in the mold to form a primary processing part of Ø9.70, a Ø17.90 rear material of the primary processing part is forcibly extruded in the mold to form a secondary processing part of Ø11.95, and a gear secondary processing part is formed by secondarily forming the secondary processing part after forming a gear primary processing part by forming the material at the rear end of the secondary processing part. As the bicycle shaft is forcibly processed in the mold, processing time is reduced and mass production is enabled to save material costs and processing costs with increased productivity.

    본 발명은 자전거축 가공방법에 관한 것으로, 더욱 상세하게는 자전거축을 선삭 가공하지 않고 금형단조에서 강제 압출성형하므로서 가공비의 절감 및 대량생산 가능하도록 한 자전거축 가공방법에 관한 것이다. 본 발명은, 자전거축을 가공하기 위한 봉형상의 Ø17.90의 소재를 금형에서 강제 압출시켜 Ø9.70의 1차가공부를 성형하고, 1차가공부의 후단 Ø17.90의 소재를 금형에서 강제 압출시켜 Ø11.95의 2차가공부를 성형하며, 2차가공부 후단의 소재를 금형단조에서 포밍성형하여 기어1차가공부를 성형한 후, 2차가공부를 금형단조에서 2차 포밍가공하여 기어2차가공부를 성형하는 것으로, 상기의 본 발명은 자전거축의 가공을 금형단조에서 강제압출 가공하므로서 가공시간이 단축되고 대량생산이 가능하게되어 가공비의 절감 및 생산성의 증대로 인한 원가절감의 효과를 얻을 수 있는 것이다.


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    Title :

    BIKE-AXIS MACHINING METHODS


    Additional title:

    자전거축 가공방법


    Contributors:

    Publication date :

    2015-12-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B62K Fahrräder , CYCLES / B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern



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