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    • 1. 发明申请
    • Production method of cam lobe piece of assembled camshaft
    • 凸轮凸轮轴组装凸轮轴的生产方法
    • US20030159284A1
    • 2003-08-28
    • US10347482
    • 2003-01-21
    • NISSAN MOTOR CO., LTD.
    • Yujiro OharaHiroshi Takano
    • B21K001/12
    • B21J5/02B21K1/00Y10T29/49293Y10T29/49995
    • A method of producing a cam lobe piece of an assembled camshaft in a valve operating system for an internal combustion engine. The method comprises (a) forming a profile of the cam lobe piece by upsetting a material under forging to obtain an intermediately formed body; (b) piercing a central portion of the intermediately formed body to form a shaft bore; and (c) ironing an inner peripheral surface of the pierced intermediately formed body to form unevenness at the inner peripheral surface, all accomplished by cold working. The material at the forming the profile of the cam lobe piece has a first section located on a side of a cam nose of the cam lobe piece, and a second section located longitudinally opposite to the first section. The material has a thickness which gradually increases in a direction from the second section to the first section.
    • 一种在用于内燃机的阀操作系统中制造组装的凸轮轴的凸轮凸角件的方法。 该方法包括:(a)通过在锻造下镦锻材料形成凸轮凸角件的轮廓以获得中间形成的主体; (b)刺穿中间成形体的中心部分以形成轴孔; (c)熨烫穿孔的中间成型体的内周面,在内周面形成凹凸,均通过冷加工实现。 在形成凸轮凸角件的轮廓的材料具有位于凸轮凸角部件的凸轮头部的一侧的第一部分和位于与第一部分纵向相对的第二部分。 该材料具有从第二部分到第一部分的方向逐渐增加的厚度。