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    • 27. 发明专利
    • Machining device of center hole
    • 中心孔加工装置
    • JPS58186510A
    • 1983-10-31
    • JP6952382
    • 1982-04-27
    • Nissan Motor Co Ltd
    • HASHIMOTO YOSHIO
    • B23B49/04B25D5/00
    • B23B49/04
    • PURPOSE:To machine a distance between both centers of a work to a fixed length even if the work is provided with unevenness in its length while machine at least one of the center holes in a fixed depth. CONSTITUTION:A work W is movably supported in the axial direction between a primary side punch 1 and a secondary side punch 2. Under this condition, an oil hydraulic cylinder is operated to adapt the punch 1 to an end face S1 of the work W, if the hydraulic cylinder is further operated, the face S1 is adapted to a stopper face 12 of an aligning ring 13 to form a center hole of required size l1 to the face S1. An advance limit position of the punch 2 is determined by a mechanical stopper, and advancing motion of the punch 2 is continued by a distance l2 for a length L of the work W to form a center hole of required size to a face S2, in this way, unevenness of the distance l2 between the center holes can be reduced.
    • 目的:为了将工件的两个中心之间的距离加工成固定长度,即使工件长度不均匀,同时将至少一个中心孔固定在一定深度。 构成:工件W在初级侧冲头1和次级侧冲头2之间沿轴向移动地支撑。在这种条件下,操作油压缸以使冲头1适应工件W的端面S1, 如果进一步操作液压缸,则面S1适配于对准环13的止动面12,以形成面S1的所需尺寸的中心孔。 冲头2的前进极限位置由机械止动件确定,冲头2的前进运动在工件W的长度L上延续距离l2,以形成面S2的所需尺寸的中心孔, 这样,可以减小中心孔之间的距离l2的不均匀性。