Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Patent
1996-08-22
1999-03-02
Bishop, Steven C.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Having tool-opposing, work-engaging surface
408 1R, 408 97, 408103, B23B 3900
Patent
active
058761560
ABSTRACT:
A printed circuit board working machine includes a spindle which holds a cutting tool and is movable to bring the tool into contact with and away from a printed-circuit board to be worked. A device for pressing down the printed-circuit board comprises a support mechanism associated with the spindle of the working machine for relative movement thereto, a plurality of holding sections movably supported by the mechanism and a driving mechanism for the holding sections. The holding sections are formed with holes of different sizes, respectively. When working operation, after the support mechanism causes the holding sections to move away to a position free from interference with the tool, the driving mechanism moves the holding sections to align one of the through holes, corresponding to a size of the tool to be used, with the tool. Subsequently, the support mechanism returns the holding sections to an initial position and, before the tool reaches the printed-circuit board, brings the corresponding holding section into pressure contact with the printed-circuit board.
REFERENCES:
patent: 5024562 (1991-06-01), Arai et al.
patent: 5199830 (1993-04-01), Otani et al.
Irie Akira
Otani Tamio
Yamaura Kouji
Bhargava Adesh
Bishop Steven C.
Hitachi Seiko Ltd.
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