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1. 发明授权

US4590782A Making of a bevel gear 失效
标题翻译：制造锥齿轮
公开(公告)号：US4590782A
公开(公告)日：1986-05-27
申请号：US165797
申请日：1980-07-03
申请人： Herbert Leykamm , Siegfried Knabel
发明人： Herbert Leykamm , Siegfried Knabel
IPC分类号： B21K1/30
CPC分类号： B21K1/30
摘要： A bevel gear is made by means of a die, a punch, and two concentrical counterpunches, one having a particularly contoured extension. A cylindrical blank, having a diameter not larger than the smallest bevel gear root circle, is inserted in the die; a portion is held by one counterpunch but reverse-extruded in part into the gap between that counterpunch and the advancing punch. A portion of the blank inserted into the interior of the die flows concurrently radially into the small-diameter portion of the die cavity. Subsequently, the reverse-extruded, tubular portion is forced back in parts by the second counterpunch, acting in the gap, to fill the large-diameter portion of the cavity. A tubular shaft extension may remain on the gear.
摘要翻译：锥齿轮通过模具，冲头和两个同心的对接件制成，一个具有特别轮廓的延伸部。将直径不大于最小锥齿轮根圆的圆柱形坯料插入模具中; 一部分由一个对接部分保持，但是部分地被挤压到该对应部件和前进冲头之间的间隙中。插入模具内部的坯料的一部分同时径向流入模腔的小直径部分。随后，反向挤出的管状部分被作用在间隙中的第二对应部分部分地压回以填充空腔的大直径部分。管状轴延伸部可能残留在齿轮上。

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