Method for drilling a printed circuit board

Details Method for drilling a printed circuit board Method for drilling a printed circuit board

1989-03-17

1991-11-19

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 17, 408 95, B23B 3500

Patent

active

050661710

ABSTRACT:
In a method of and an apparatus for drilling a hole in a workpiece, a pressure foot associated with a drill is moved into contact with the workpiece, and a drill bit associated with the drill is moved from a drill-starting position into the workpiece, toward the drill-starting position and again into the workpiece while maintaining the pressure foot in constant contact with the workpiece. The drill is reciprocally fed by a plurality of times under the pressure of the pressure foot acting upon the printed circuit board. In either of the method and the apparatus, a hole with a high aspect ratio can be formed in a workpiece made from a thin, flexible material.

REFERENCES:
patent: 2768539 (1956-10-01), Wollenhaupt et al.
patent: 3129613 (1964-04-01), Burg
patent: 3637318 (1972-01-01), Hayes
patent: 4123188 (1978-10-01), Deremo et al.
patent: 4212570 (1980-07-01), Larsson
patent: 4269549 (1981-05-01), Block
patent: 4311419 (1982-01-01), Block
patent: 4872787 (1989-10-01), Arai et al.

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