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    • 33. 发明专利
    • Helical broach for internal gear machining, and broaching method
    • 用于内齿轮加工的铰接和手动方法
    • JP2009220261A
    • 2009-10-01
    • JP2008070696
    • 2008-03-19
    • Nachi Fujikoshi Corp株式会社不二越
    • SUMIYA SOICHIMURAI YASUHIROAIMONO SADAHIRO
    • B23F21/26B23D43/06B23F5/28
    • PROBLEM TO BE SOLVED: To provide a helical broach for internal gear machining which has little influence by heat generated from broaching with a rough cutting edge portion, has a good dimensional transferability of a cutting edge of a broach of a finish cutting edge, and has a small variation of the machined dimension by dispersion of a generated heat, and to provide a broaching method.
      SOLUTION: The helical broach includes: a first rough cutting broach 10 having a plurality of rough cutting edges 2 aligned in a so-called tooth height rising in which the tooth height gradually increases in the tooth depth direction (8 of Fig. 2(a)) toward the rear along a predetermined helix angle β in the longitudinal direction with respect to an axis 5 of a body 1 as shown in Fig. 1(a); and a second finish cutting broach 20 having a plurality of finish cutting edges 22 aligned in a so-called tooth thickness rising in which the tooth thickness gradually increases in the tooth thickness direction (9 of Fig. 2(b)) toward the rear along the predetermined helix angle β in the longitudinal direction with respect to an axis 25 of a body 21 following a front guide portion 50 as shown in Fig. 1(b).
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了提供一种内齿轮加工的螺旋拉刀,其对由粗切削刃部分的拉削产生的热几乎没有影响,具有良好的切削刃的切削刃的尺寸转移性 并且通过产生的热的分散具有小的加工尺寸的变化,并且提供拉削方法。 解决方案:螺旋拉刀包括:第一粗切割拉刀10,其具有多个粗切削刃2,所述多个粗切削刃2以所谓的齿高上升,齿高度在齿深方向(图8的8)上逐渐增加。 如图2所示,相对于主体1的轴线5沿着长度方向的预定的螺旋角β向后方朝向后方延伸。 1(a); 以及具有多个切削刃22的第二精切割刀20,所述多个切削刃22以所述齿厚度上升排列,所述齿厚度上升,齿厚度方向(图2(b)的9)朝向后方逐渐增加 如图1所示,相对于主体21的轴线25相对于前引导部50的预定的螺旋角β。 1(b)。 版权所有(C)2010,JPO&INPIT
    • 34. 发明专利
    • Inner surface broaching method
    • 内表面修饰方法
    • JP2005230937A
    • 2005-09-02
    • JP2004040538
    • 2004-02-17
    • Nachi Fujikoshi Corp株式会社不二越
    • SUMIYA SOICHIMURAI YASUHIRO
    • B23F5/28B23D37/04
    • PROBLEM TO BE SOLVED: To provide a broaching method causing no chipping at the edge tip of a cutting edge even in the case of broaching a high hardness material of 45-65 HRC at high-speed cutting of 40 m/min.
      SOLUTION: In this inner surface broaching method for performing predetermined machining to an inner surface 13 of a workpiece, a broaching tool 5 in which a plurality of cutting edges 9 formed with obtuse rake angles are disposed in the axial direction of an outer periphery 8, is used to pass through the axial direction of the workpiece of hollow cylinder shape with a hardness of 45-65 HRC near the surface of a broached part to form chamfered parts 1 at the cutting edge bite parts of the workpiece. The chamfered parts are formed in tapered shape reduced in diameter toward the inner surface of the workpiece. When a chamfer angle of the chamfered part is made α and the rake angle of the cutting edge is made β, the difference γ between the chamfer angle α and the rake angle β is 20°≤γ≤60°.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:即使在以40m / min的高速切割拉削45-65HRC的高硬度材料的情况下,也提供在切削刃的边缘尖端处不会发生切屑的拉削方法。 解决方案:在用于对工件的内表面13进行预定加工的该内表面拉削方法中,在外部的轴向方向上设置有形成有钝角的多个切削刃9的拉刀5, 周边8,用于在拉削部分的表面附近以45-65HRC的硬度穿过中空圆筒形状的工件的轴向方向,以在工件的切削刃咬合部分处形成倒角部分1。 倒角部分形成为朝向工件的内表面直径减小的锥形形状。 当倒角部分的倒角角为α,切削刃的前角为β时,倒角α与前角β之间的差γ为20°≤γ≤60°。 版权所有(C)2005,JPO&NCIPI