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    • 52. 发明授权
    • Double cylinder body and a manufacturing method thereof
    • 双缸体及其制造方法
    • US5903967A
    • 1999-05-18
    • US891443
    • 1997-07-10
    • Hiroshi Taniguchi
    • Hiroshi Taniguchi
    • H02K5/04B21C37/15B21D39/04B21D51/10B21J5/06B21K21/16B21K25/00H02K1/18H02K15/02B21D39/00
    • B21C37/154B21D39/04B21K25/00H02K1/185H02K15/028Y10T29/49908Y10T29/49927Y10T29/49936Y10T29/4994
    • It is an object of the invention to provide a double cylinder body and a manufacturing method thereof which can connect the inside cylinder and the outside cylinder strongly. The stopper 45 is protrudely provided on the outer circumference of one end portion of the inside cylinder 43 which will be a base of the yoke 13 made from iron, the inside cylinder 43 is attached on the outer circumference of the punch 33 on which the swelling portion 34 is fitted. The punch 33 to which the inside cylinder 43 is fitted is press inserted in the void 42 of the outside cylinder 41 from the swelling portion 34 side. The outside cylinder 41 in which the punch 33 and the inside cylinder 43 are press inserted is press inserted in the die 31. The punch 33 is only ejected from the inside cylinder 43 during ironing the inside face of the inside cylinder 43. Since the inside cylinder 43 is elongated in the circumferential direction thereof by the ironing of the swelling portion 34, the inside cylinder 43 is press contacted on the inner circumferential face of the outside cylinder 41, it is possible to manufacture the motor housing 10 in which the casing 11 made from aluminum and the yoke 13 made from iron are connected to each other strongly.
    • 本发明的目的是提供一种能够将内筒和外筒连接牢固的双缸体及其制造方法。 止动件45突出地设置在作为由铁制成的轭架13的基部的内侧圆筒43的一个端部的外周上,内侧圆筒43安装在冲头33的外周上,在其上具有膨胀 部分34被装配。 将内筒43嵌合的冲头33从膨胀部34侧压入外筒41的空隙42内。 将冲头33和内筒43压入其中的外筒41被压入模具31中。在熨烫内筒体43的内表面期间,冲头33仅从内筒43排出。由于内侧 气缸43通过膨胀部分34的熨烫而在圆周方向上延伸,内圆柱体43在外圆筒41的内周面上被压接,可以制造电机壳体10,其中壳体11 由铝制成,并且由铁制成的轭13彼此牢固地连接。