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1. 发明授权

US5920981A Method of manufacturing a rotor for an electromagnetic clutch assembly 失效
标题翻译：制造用于电磁离合器组件的转子的方法
公开(公告)号：US5920981A
公开(公告)日：1999-07-13
申请号：US823990
申请日：1997-03-25
申请人： R. James Bushelle , Danny L. Gander , Michael J. Siegmund , David J. Yaniak
发明人： R. James Bushelle , Danny L. Gander , Michael J. Siegmund , David J. Yaniak
IPC分类号： B21D53/26 , F16D27/112 , F16D27/14 , H01F41/02
CPC分类号： B21K23/00 , F16D27/112 , F16D27/14 , F16D2250/00 , Y10T29/4902 , Y10T29/49075
摘要： A method for manufacturing a rotor for use in an electromagnetic friction clutch includes the initial step of forming a flat circular blank of material into a generally cup-shaped outer rotor piece including a flat circular base portion and an annular flange portion. A piercing operation is performed to form a non-circular opening through the base portion of the outer rotor piece. Then, a plurality of concentric arrays of discontinuous recesses are formed sequentially in the outer rotor piece from the radially outermost area of the base portion to the radially innermost area of the base portion. This sequential forming virtually eliminates any manufacturing related stresses in the radially innermost region of bridge areas defined between adjacent recesses, while focusing such stresses toward the radially outermost regions of the bridge areas. A piercing operation is next performed on the outer rotor piece so as to form a circular opening therethrough. Next, a portion of the outer circumferential surface of the annular flange portion of the outer rotor piece is deformed so as to provide a circumferential rib thereabout. The next step in the method is to form a precise circumferential inner surface for the opening. This inner circumferential surface provides a seat to accurately position a hollow cylindrical inner rotor piece relative to the outer rotor piece. The inner rotor piece is also formed from a magnetically permeable material, such as a ferromagnetic material, and includes an axially extending protrusion which extends within the opening and is piloted on the axially extending surface. The inner rotor piece can then be secured to the outer rotor piece in a conventional manner, such as by laser welding, to form a rotor preform. Lastly, portions of the rotor preform are finish machined to form a rotor.
摘要翻译：一种制造用于电磁摩擦离合器的转子的方法包括将材料的扁平圆形坯料形成为包括平坦的圆形基部和环形凸缘部分的大致杯状的外转子片的初始步骤。执行穿刺操作以形成通过外转子片的基部的非圆形开口。然后，在外转子片中从基部的径向最外侧区域到基部的径向最内侧的区域依次形成多个不连续凹部的同心排列。这种顺序形成实际上消除了在相邻凹部之间限定的桥接区域的径向最内部区域中的任何制造相关应力，同时将这些应力聚焦到桥接区域的径向最外侧区域。接着在外转子片上进行穿孔操作，以形成通过其的圆形开口。接下来，外转子片的环形凸缘部的外周面的一部分变形，以在其周围形成周向肋。该方法的下一步是形成开口的精确圆周内表面。该内圆周表面提供座位以相对于外转子片精确地定位中空的圆柱形内转子片。内转子片也由诸如铁磁材料的导磁材料形成，并且包括在开口内延伸并在轴向延伸的表面上被引导的轴向延伸突起。然后可以以常规方式例如通过激光焊接将内转子件固定到外转子件上，以形成转子预制件。最后，转子预制件的部分被精加工以形成转子。

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