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    • 5. 发明授权
    • Internally-toothed member, and method and apparatus for molding same
    • 内齿构件,以及用于成型的方法和装置
    • US06508094B1
    • 2003-01-21
    • US09606695
    • 2000-06-30
    • Masahiro GotouOsamu FukukawaMasaki SaitouHideyuki NagaiHiroshi Katou
    • Masahiro GotouOsamu FukukawaMasaki SaitouHideyuki NagaiHiroshi Katou
    • B21D2200
    • B21H5/025B21D22/16B21H1/04B21H7/187F16D13/62F16D25/0638
    • The present invention provides an internally-toothed member of reduced size and enhanced quality, durability and productivity in manufacture. This internally-toothed member has a first cylinder portion and a second cylinder portion which is larger in diameter than the first cylinder portion. First and second internal teeth are formed to protrude radially inwardly from inner peripheral surfaces of the first and second cylinder portions respectively. Because a meshing portion can be formed as second internal teeth protruding from an inner periphery of the second cylinder portion, the diameter of the internally-toothed member is relatively small. Because the area between the second internal teeth and a concave portion and the concave portion itself do not decrease in thickness during formation of the second internal teeth, it is possible to prevent cracking and to thereby enhance durability of the internally-toothed member. Further, because there is no sagging of the inner peripheral surface of the meshing portion, the quality of the internally-toothed member is further enhanced.
    • 本发明提供一种减小尺寸并提高制造质量,耐久性和生产率的内齿构件。 该内齿构件具有直径比第一气缸部分大的第一气缸部分和第二气缸部分。 第一和第二内齿形成为分别从第一和第二圆筒部分的内周表面径向向内突出。 因为啮合部分可以形成为从第二圆筒部分的内周伸出的第二内齿,所以内齿构件的直径相对较小。 由于第二内齿与凹部之间的区域和凹部本身在第二内齿的形成期间的厚度没有减小,因此能够防止裂纹,从而提高内齿构件的耐久性。 此外,由于啮合部的内周面没有下垂,因此进一步提高了内齿部件的品质。
    • 7. 发明申请
    • MEMBER HAVING A CHAMFERED THROUGH HOLE AND MANUFACTURING METHOD OF THE SAME
    • 具有通孔的成员和其制造方法
    • US20090090156A1
    • 2009-04-09
    • US12238050
    • 2008-09-25
    • Masaki NAKAJIMAHideyuki NagaiKazushi NagashimaAriyoshi Terao
    • Masaki NAKAJIMAHideyuki NagaiKazushi NagashimaAriyoshi Terao
    • B21D28/24B21D28/34
    • B21D28/26B21D28/16B21D28/28
    • A method of forming a chamfered through hole having a chamfered portion at each end thereof by: forming a prepared hole in a plate-like portion; forming a first chamfered portion by driving a first punch; forming a second chamfered portion by driving a second punch, which has a second tapered surface and a generally columnar central pressing portion protruding from the center of the second tapered surface and having an annular corner at a tip thereof, and thereby forming the second chamfered portion and a central recess recessed axially inward; and punching out an unnecessary portion protruding radially inward of the prepared hole by using a finishing punch having an outer diameter equal to or smaller than that of the corner of the central pressing portion. The punching out the unnecessary portion is performed by punching from the first chamfered portion toward the second chamfered portion using the finishing punch.
    • 一种在其两端形成有倒角部分的倒角通孔的方法,其特征在于,在板状部分形成预制孔; 通过驱动第一冲头形成第一倒角部分; 通过驱动第二冲头形成第二倒角部分,所述第二冲头具有第二锥形表面和从第二锥形表面的中心突出并且在其尖端处具有环形角的大致圆柱形的中心挤压部分,从而形成第二倒角部分 以及轴向向内凹入的中心凹部; 并且通过使用具有等于或小于中心按压部分的角度的外径的精加工冲头,冲出预定孔的径向向内突出的不必要部分。 通过使用精整冲头从第一倒角部向第二倒角部冲压来进行冲压不需要的部分。