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1. 发明公开

EP1331052A2 Production method of cam lobe piece of assembled camshaft 有权
标题翻译： Verfahren zur Herstellung einer Nockefüreine gebaute Nockenwelle
公开(公告)号：EP1331052A2
公开(公告)日：2003-07-30
申请号：EP03001263
申请日：2003-01-21
申请人： NISSAN MOTOR
发明人： OHARA YUJIRO , TAKANO HIROSHI
IPC分类号： F01L1/04 , B21J5/00 , B21J5/02 , B21J5/06 , B21J5/12 , B21K1/00 , B21K1/20 , B21K1/76 , F16H53/02
CPC分类号： B21J5/02 , B21K1/00 , Y10T29/49293 , Y10T29/49995
摘要： A method of producing a cam lobe piece (1) 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 (1) by upsetting a material (W) under forging to obtain an intermediately formed body (W1); (b) piercing a central portion of the intermediately formed body (W1) to form a shaft bore (2); and (c) ironing an inner peripheral surface of the pierced intermediately formed body (W1) 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 (1) has a first section (5a) located on a side of a cam nose of the cam lobe piece (1), and a second section (5b) located longitudinally opposite to the first section. The material has a thickness which gradually increases in a direction from the second (5b) section to the first section (5a).
摘要翻译：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（1）的方法。该方法包括：（a）通过在锻造下镦锻材料（W）来形成凸轮凸片（1）的轮廓，以获得中间成形体（W1）; （b）刺穿中间成型体（W1）的中心部分以形成轴孔（2）; （c）熨烫穿孔的中间成型体（W1）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（1）的轮廓的材料具有位于凸轮凸角件（1）的凸轮头部侧的第一部分（5a）和位于凸轮凸角部件（1）的纵向相对的第二部分第一部分。材料具有从第二（5b）部分到第一部分（5a）的方向上逐渐增加的厚度。

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