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    • 3. 发明申请
    • FORGING METHOD, CLOSED FORGING MOLD AND TRIPOD UNIFORM MOTION UNIVERSAL JOINT
    • 锻造方法,闭模锻模和三辊均匀运动通用连接
    • US20110224004A1
    • 2011-09-15
    • US13129648
    • 2009-11-30
    • Jiahua MiaoAkira SeraShunsuke Makino
    • Jiahua MiaoAkira SeraShunsuke Makino
    • F16D3/27B21D22/00
    • F16D3/2055B21J5/02B21J5/025B21K1/762B21K1/763F16D2250/00
    • Provided are a forging method and a full-enclosed forging die which contribute to alleviation of an enclosing force applied to dies and in which a relatively small enclosing apparatus can be used even with respect to larger-sized products. Further, provided is a tripod type constant velocity universal joint using a tripod member molded with such a full-enclosed forging die. Using a full-enclosed forging die including openable/closable dies (11, 12) and punches (14, 15) for pressing a material between the dies (11, 12), a product (tripod member) (16) including a boss portion (18) and shaft portions (17) protruded radially from the boss portion (18) is molded. A projection area in a boss-portion axial direction toward a die (11, 12) side of the boss portion (18) is made to be smaller than another projection area in the boss-portion axial direction toward the die side, the another projection area being defined when a radially outer surface is formed as a single convex curved surface about a boss-portion axial center.
    • 提供了锻造方法和全封闭锻造模具,其有助于减轻施加到模具的封闭力,并且其中即使对于较大尺寸的产品也可以使用相对较小的封闭装置。 此外,提供了使用用这种全封闭锻造模具成型的三脚架构件的三脚架式等速万向接头。 使用包括可打开/关闭的模具(11,12)的全封闭的锻造模具和用于在模具(11,12)之间挤压材料的冲头(14,15),包括凸起部分(16)的产品(三脚架构件) (18)和从凸台部(18)径向突出的轴部(17)。 凸台部轴向朝向凸台部(18)的模具(11,12)侧的突出区域比凸起部轴向朝向冲模侧的另一投影面积小,另一凸部 当径向外表面形成为围绕凸台部分轴向中心的单个凸曲面时限定区域。
    • 4. 发明申请
    • FORGING METHOD, MOLDING DEVICE FOR FORGINGS, AND TRIPOD UNIFORM MOTION UNIVERSAL JOINT
    • 锻造方法,用于锻造的模具和三维运动通用联合
    • US20110224005A1
    • 2011-09-15
    • US13129650
    • 2009-11-30
    • Jiahua MiaoAkira SeraShunsuke Makino
    • Jiahua MiaoAkira SeraShunsuke Makino
    • F16D3/26B21D22/00
    • B21J5/025B21J5/02B21J9/02B21J9/022B21K1/762B21K1/763F16D3/2055F16D3/34F16D2250/00
    • Provided are a forging method, a forged-product molding apparatus, and a tripod type constant velocity universal joint which contribute to reduction of shear drop and avoidance of an increase in processing load generated through contact of a leading end surface of a shaft portion and dies even when an excessively-heavy raw material is mixed so that a life of the die can be prolonged. After molding a product-to-be-preliminarily-molded to form a preliminarily molded product (20A) as a material, the preliminarily molded product (20A) is put into a full-enclosed forging die (30) so that a product is molded with the full-enclosed forging die (30). On a preliminary leading-end surface to be formed as a leading end surface (17a) of a shaft portion (17) of the product formed of the preliminarily molded product (20A), there is formed a shear-drop suppressing portion (65) for suppressing thickness reduction on a boss-portion side of an outer peripheral portion of the leading end surface (17a) of the shaft portion (17) of the product (16). At a time of putting the preliminarily molded product (20A) into the full-enclosed forging die (30) so as to mold the product (16), a relief portion (26) is formed between the leading end surface (17a) of the shaft portion (17) to be formed and a cavity (24) of the full-enclosed forging die (30).
    • 提供锻造方法,锻造产品成型装置和三脚架式等速万向接头,其有助于降低剪切降低,并且避免由于轴部和模具的前端面的接触而产生的加工负荷的增加 即使当过度沉重的原料混合,从而可以延长模具的使用寿命。 在将预成型产品成型后,形成预成型品(20A)作为材料,将预成型品(20A)放入全封闭锻造模具(30)中,成型品 全封闭锻造模具(30)。 在由预成型体(20A)形成的产品的轴部(17)的前端面(17a)形成的预备前端面上形成有剪切抑制部(65), 用于抑制产品(16)的轴部(17)的前端面(17a)的外周部的凸台部侧的厚度减小。 在将预成型体(20A)投入到全封闭锻造模具(30)中以成形产品(16)的时刻,在所述前端面(17a)之间形成有释放部(26) 要形成的轴部分(17)和全封闭锻模(30)的空腔(24)。
    • 9. 发明申请
    • TRIPOD TYPE CONSTANT-VELOCITY UNIVERSAL JOINT AND METHOD FOR PRODUCING THE SAME
    • 三重类型恒定速度通用接头及其制造方法
    • US20120021842A1
    • 2012-01-26
    • US13259504
    • 2010-04-02
    • Junichi IzuminoKenji KonakaHiroshi MurakamiAkira SeraJiahua MiaoShunsuke Makino
    • Junichi IzuminoKenji KonakaHiroshi MurakamiAkira SeraJiahua MiaoShunsuke Makino
    • F16D3/205B21K1/14
    • F16D3/2055B21K1/763F16D2003/2026F16D2250/00
    • Provided is a manufacturing method for a tripod type constant velocity universal joint including: an outer joint member having an inner peripheral surface provided with: three track grooves extending in an axial direction; and roller-guide surfaces extending in the axial direction on both sides of each of the three track grooves; a tripod member including three journals each projected into a radial direction; and a roller unit supported rotatably around each of the three journals of the tripod member and inserted rollably in each of the three track grooves of the outer joint member, the manufacturing method including, when forging a raw-shaped material corresponding to each of the three journals into a journal shape with use of a molding surface of a die, under a state in which a relief portion is provided on a raw-shaped-material-leading-end-side of the die, molding an outer peripheral surface of the raw-shaped material into a projected round shape with use of a tapered surface formed on the molding surface with which the outer peripheral surface of the raw-shaped material is held in contact and a recessed round surface formed between the molding surface and the tapered surface.
    • 本发明提供一种三脚架式等速万向接头的制造方法,其特征在于,包括:外侧接头构件,其具有设置有沿轴向延伸的三个轨道槽的内周面; 以及在三个轨道槽的每一个的两侧沿轴向延伸的辊导向表面; 一个三脚架构件,其中包括各自沿径向方向投射的三个期刊; 以及滚子单元,其可旋转地支撑在三脚架构件的三个轴颈的每一个周围并且可滚动地插入到外接头构件的三个轨道槽中的每一个中,该制造方法包括当锻造与三个脚架构件中的每一个相对应的原始形状材料时 在模具的原料前端侧设置有使浮雕部设置在模具的外周面的状态下,使用模具的成型面将其形成为轴颈形状 使用形成在成型面的成形面上的锥形表面形成投影圆形的原料形状的材料与该成型材料的外周面保持接触,以及形成在成形表面和锥形表面之间的凹入的圆形表面。