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    • 72. 发明授权
    • Method for producing worm shaft for use in power steering apparatus
    • 用于动力转向装置的蜗杆轴的制造方法
    • US4689983A
    • 1987-09-01
    • US571171
    • 1984-01-16
    • Naosuke MasudaSohsuke Sunaga
    • Naosuke MasudaSohsuke Sunaga
    • B21C23/14B21J5/12B21K1/10B21K1/20B21K1/30B62D5/083B62D5/24B21D22/26B21D22/28
    • B21J5/12B21K1/20
    • A method for producing a worm shaft for use in a rotation control valve of a power steering mechanism. The worm shaft is formed with grooves which receive a control body and form therewith a fail safe structure. The grooves are formed evenly so that the permitted range of movement on either side of a neutral position is uniform. A cylindrical member is plastically deformed in two steps to form the outer side of the control valve. Then, while in a die having in inner shape corresponding to the desired outer shape of the worm shaft, a punch, having an outer shape corresponding to the desired shape of the grooves on the inner surface of the worm shaft and an enlarged-diameter portion, is pressed into a hole in the interior of one end of the member to thereby plastically deform the member to the desired final inner and outer configurations.
    • 一种用于动力转向机构的旋转控制阀中使用的蜗杆轴的制造方法。 蜗杆轴形成有容纳控制体并具有故障安全结构的凹槽。 凹槽形成均匀,使得在中立位置的任一侧上允许的运动范围是均匀的。 圆柱形构件在两个步骤中塑性变形以形成控制阀的外侧。 然后,在具有与蜗杆轴的期望外形对应的内部形状的模具中,具有与蜗杆内表面上的所需形状对应的外形的冲头和扩径部 被压入构件的一端的内部的孔中,从而将构件塑性变形到期望的最终内部和外部构型。
    • 73. 发明授权
    • Method and apparatus for single step formation of spherical retainer
    • 用于单步形成球形保持器的方法和装置
    • US4604886A
    • 1986-08-12
    • US706997
    • 1985-02-28
    • John C. McGregor, Jr.
    • John C. McGregor, Jr.
    • B21D22/26B21D51/08B21D53/10B21D22/00
    • B21D53/10
    • A tool for stamping annular blanks to form retainers for truncated spherical members in a single stroke stamping operation comprises a sectored punch having at least one pair of diametrically opposed sectors of a cylinder separated from one another at their apexes such that the sectors of two punches can be intermated. The distal ends of the sectors are spherically contoured such that alternating spherical surfaces are formed on the inside surface of the retainers by two intermating sectored punches. The sectored punches form alternating cylindrical and spherical surfaces into the upper and lower portions of a blank to form the retainer. The cylindrical surfaces permit spherical members to be inserted into the retainers by hand or with the use of hand tools.
    • 用于冲压环形毛坯以在单次冲压操作中形成用于截顶球形构件的保持器的工具包括切割冲头,其具有在其顶点处彼此分离的至少一对直径相对的圆柱体,使得两个冲头的扇区可以 被隔离 扇形体的远端是球形的,使得通过两个相互隔开的冲压孔在保持器的内表面上形成交替的球形表面。 扇形冲头在坯料的上部和下部形成交替的圆柱形和球形表面以形成保持器。 圆柱形表面允许球形构件用手或使用手动工具插入保持器中。