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    • 1. 发明公开
    • Method for stamping stepper motor laminations
    • StanzverfahrenfürSchrittmotorlamellen。
    • EP0441046A1
    • 1991-08-14
    • EP90313737.0
    • 1990-12-17
    • MAGNETIC METALS CORPORATION
    • Frame, Charles
    • H02K15/02
    • B21D28/22H02K15/022Y10T29/49012Y10T83/0534Y10T83/06
    • Laminae (10) for stators or rotors in rotary electric machines are stamped from a thin sheet of material. The laminae have a plurality of substantially rectangular teeth (18) with interstices (20) therebetween. A plurality of openings (54) are pre-punched in the thin sheet, each of said openings having an edge (14) which lies on the circumference of a circle centered about the centre of the lamina. A portion of material (12) is then punched from the thin sheet using a spline punch, whereby the punched portion defines side edges of each of the teeth and the interstices between the teeth, the side edges (58) of each of the teeth being parallel to each other. Intersections are formed by the punched portions defining the side edges of the teeth and the edges of each of the openings defining the inner and/or outer diameter of the lamina, the intersections forming sharp corners (59).
    • 用于旋转电机中的定子或转子的薄片(10)由薄片材料冲压。 薄片具有多个基本矩形的齿(18),其间具有间隙(20)。 多个开口(54)在薄片中被预先冲压,每个所述开口具有位于围绕薄片中心的圆周的圆周上的边缘(14)。 然后使用花键冲片从薄片冲切一部分材料(12),由此冲压部分限定每个齿的两个边缘和齿之间的间隙,每个齿的侧边缘(58)为 彼此平行。 交点由形成齿的侧边缘的冲压部分形成,并且每个开口的边缘限定了层板的内部和/或外部直径,交点形成尖锐的角部(59)。