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    • 6. 发明授权
    • Method of making a forging die
    • 制造锻造模具的方法
    • US3863525A
    • 1975-02-04
    • US46374174
    • 1974-04-24
    • SCHAEFER EQUIP
    • CALE ROLAND E
    • B21J13/02B21K5/20B23C3/28
    • B23C3/28B21J13/02B21K5/20Y10T409/303752Y10T409/30756
    • A first rotating end-type milling cutter has a hemispherical lower end and is moved down into a metal block to form a hemispherical recess in it. The block then is moved across the cutter to cause it to cut a horizontal groove in the block having horizontally curved end walls, after which the cutter is removed and a second milling cutter is positioned with its lower end in one side of the groove near one end thereof. The lower end of the second cutter is hemispherical but smaller than the first cutter. The second cutter is rotated while maintaining it substantially in contact with the wall of the groove and simultaneously moving it downwardly in the groove and across it and up to its opposite side. This movement is constantly repeated as the block is moved lengthwise of the groove to move one end of it toward the cutter so that the cutter will cut into the curved end wall and form an arcuate shoulder. Another die block is formed in the same way so that when the two blocks are placed together with their grooves registering, a cylindrical die cavity will be formed having an end wall shaped like part of a sphere and spaced inwardly from the side wall of the cavity by an annular shoulder. A rodlike member forged between these die blocks will have at one end a projection shaped like part of a sphere and spaced inwardly from the periphery of that member.
    • 第一旋转端铣刀具有半球形下端并向下移动到金属块中以在其中形成半球形凹槽。 然后将块移动穿过切割器以使其在具有水平弯曲的端壁的块中切割水平凹槽,之后切割器被移除,并且第二铣刀被定位成其下端在槽的一侧靠近一个 结束。 第二切割器的下端是半球形但小于第一切割器。 旋转第二个切割器,同时保持其基本上与凹槽的壁接触,并同时在凹槽中向下移动并跨过其并且直到其相对侧。 这个运动不断重复,因为块沿着槽的长度方向移动,以将其一端移向切割器,使得切割器将切入弯曲的端壁并形成弓形的肩部。 以相同的方式形成另一个模块,使得当两个块被放置在一起并且其凹槽对准时,将形成圆柱形模腔,其具有形成为球体的一部分的端壁并且与腔的侧壁间隔开 通过环形肩。 锻造在这些模块之间的棒状构件将在一端具有形状为球体的一部分并与该构件的周边向内隔开的突起。