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    • 3. 发明公开
    • Production method of cam lobe piece of assembled camshaft
    • Verfahren zur Herstellung einer Nockefüreine gebaute Nockenwelle
    • EP1331052A2
    • 2003-07-30
    • EP03001263
    • 2003-01-21
    • NISSAN MOTOR
    • OHARA YUJIROTAKANO HIROSHI
    • F01L1/04B21J5/00B21J5/02B21J5/06B21J5/12B21K1/00B21K1/20B21K1/76F16H53/02
    • B21J5/02B21K1/00Y10T29/49293Y10T29/49995
    • 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).
    • 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。
    • 8. 发明公开
    • PUNCHING METHOD AND PUNCHING DEVICE
    • STANZVERFAHREN UND STANZVORRICHTUNG
    • EP1884299A1
    • 2008-02-06
    • EP06756578.8
    • 2006-05-25
    • SHOWA DENKO KABUSHIKI KAISHA
    • OTAKI, Atsushi, SHOWA DENKO K.K.
    • B21J5/10B21J5/02B21J5/08B21K1/14
    • B21J5/10B21D28/02B21J5/02B21K1/00B21K1/761B21K1/766
    • A hole punching method capable of executing hole punching with high material yield at a low load and preventing occurrence of underfill is provided. The hole punching method includes a step of expanding a hole punching scheduled portion 2 of a raw material 1 disposed in a cavity 12 of a closed die 11 by pressing the hole punching scheduled portion 2 from opposite sides thereof across the hole punching scheduled portion 2 with a pair of large diameter punch and small diameter punch 13 and 15 different in diameter and arranged to as to face each other so that unfilled portions remain in the cavity, a step of penetrating the small diameter punch 13 into the hole punching scheduled portion 2 of the raw material 1 while releasing or after releasing pressurization by the large diameter punch 15 to the hole opening scheduled portion 2, and a step of penetrating the large diameter punch 15 into the hole punching scheduled portion 2 of the raw material 1 while pulling out or after pulling out the small diameter punch 13 penetrated in the hole punching scheduled portion 2 of the raw material 1 from the hole punching scheduled portion 2 of the raw material 1.
    • 提供了能够以低负荷高材料产生孔冲击并防止发生底部填充的孔冲孔方法。 打孔方法包括:通过将穿孔贯穿部分2的穿孔贯穿部分2的穿孔贯穿打孔排列部2按压穿孔打孔预定部2,使设置在封闭模11的空腔12内的原料1的打孔排列部2膨胀的工序, 一对大直径的冲头和小直径的冲头13和15,其直径不同,并且相互面对地布置,使得未填充的部分保留在空腔中;将小直径冲头13穿入孔冲孔调度部分2的步骤 原料1在释放或通过大直径冲头15向开孔排出部2释放加压之后,以及将大直径冲头15穿过原料1的打孔调整部2同时拉出或 拉出从原料1的打孔调度部2中穿入的原料1的打孔调整部2的小直径冲头13 原料1。