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    • 21. 发明授权
    • Piercing assembly
    • PI ING。
    • US3782231A
    • 1974-01-01
    • US3782231D
    • 1972-07-21
    • JANNETTY L
    • JANNETTY L
    • B21D28/00B26D5/08
    • B21D28/002Y10T83/2166Y10T83/402Y10T83/8834Y10T83/8841Y10T83/885
    • A piercing assembly is incorporated as a work station in a camoperated machine such as a cam eyelet machine by mounting in the machine frame the combination of: a movable pin adapted to engage a work piece, an advancing cam and a pair of lifting cams mounted on a rotatable shaft, a cam follower to the advancing cam adapted to engage and move the pin, a slide carrying a punch for piercing the work piece, a centrally pivoted arm having a head for engaging and reciprocating the slide, a pair of lever arms linked one to each end of the centrally pivoted arm, and a pair of cam followers mounted one on each of the lever arms for alternate engagement with the lifting cams; the cam surfaces of the advancing cam and the pair of lifting cams being positioned such that engagement of the advancing cam and the lifting cams with their respective cam followers causes piercing of the work piece by the punch when the work piece has been engaged by the pin, alternating with disengagement of the pin from the work piece when the punch is withdrawn.
    • 穿孔组件作为工作站被并入凸轮操作的机器中,例如凸轮孔眼机,通过在机架中安装适于接合工件的可动销,前进凸轮和一对提升凸轮 安装在可旋转轴上的凸轮从动件,适于接合和移动销的前进凸轮的凸轮从动件,承载用于刺穿工件的冲头的滑块,具有用于接合和往复滑动的头部的中心枢转臂,一对杆 臂连接到中心枢转臂的每个端部,以及一对凸轮从动件,其一个安装在每个杠杆臂上以与提升凸轮交替接合; 前进凸轮和一对提升凸轮的凸轮表面被定位成使得当工件已经被销钉接合时,前进凸轮和提升凸轮与它们各自的凸轮从动件的接合引起冲头穿过工件 当拔出冲头时,销与销从工件脱离交替。