Metal working – Method of mechanical manufacture – Electrical device making
Patent
1986-02-21
1987-09-29
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
29700, 228 20, 2281802, H05K 300, B23P 1900
Patent
active
046960961
ABSTRACT:
Methods and apparatus for reworking printed circuit boards carrying surface mounted components by removing faulty or improperly connected components and replacing them with new components, incorporate an X-Y table for clamping the board with the target component positioned on a vertical working axis, using a heated, component-gripping vacuum head movably mounted for vertical movement and angularly rotatable pivoting adjustment, and jets of hot compressed air directed at the component's peripheral terminal leads, bringing them to solder-melting temperature, with a reversible angular drive motor connected to deliver torque to the head gently or abruptly or in reciprocating fashion, producing pivoting head movement over a small angle of rotation, shearing the adhesive which bonds the component in place, all under control of a programmed microcomputer governing operating sequences selected and initiated by the operator. The same mechanisms and techniques are employed to position and solder a new component in place.
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Green LaVerne M.
Pummell Ivan K.
Vannoni Adrio L.
Arbes Carl J.
Goldberg Howard N.
Micro Electronic Systems Inc.
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