Apparatus for drilling a hole in a printed circuit board

Details Apparatus for drilling a hole in a printed circuit board Apparatus for drilling a hole in a printed circuit board

1989-08-16

1991-03-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Including means to cause tool to progressively vibrate...

408 95, B23B 4700

Patent

active

049973193

ABSTRACT:
An apparatus for drilling a hole in a workpiece such as, for example, a printed circuit board wherein a pressure foot, associated with a drill, is moved into a position to exert a pressure on the workpiece. A drill bit associated with the drill is moved with respect to the workpiece, and an arrangement is provided for controlling the operations of the pressure foot and the drill bit in such a manner so as to move the drill bit from a drill starting position into the workpiece, then toward the drill starting position and again into the workpiece while maintaining the pressure exerted on the workpiece by the pressure foot.

REFERENCES:
patent: 4212570 (1980-07-01), Larsson
patent: 4269549 (1981-05-01), Block
patent: 4311419 (1982-01-01), Block
patent: 4605344 (1986-08-01), Hartmann

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