Metal working – Means to assemble or disassemble – Means to disassemble electrical device
Patent
1993-02-17
1994-12-27
Rada, Rinaldi I.
Metal working
Means to assemble or disassemble
Means to disassemble electrical device
29239, 83870, B23P 1904
Patent
active
053753186
ABSTRACT:
A hydraulic machine for shearing leads, connectors and other components from printed circuit (PC) boards includes a frame supporting (i) a carriage slideable on inclined parallel rails carrying a shear blade, (ii) a jacking platform providing a flat surface parallel the rails moveable perpendicularly, (iii) an anvil located beyond lower end of the rails having a planer face with a horizontal notch for capturing an edge of and supporting a PC board laid flatly on the jacking platform, and (iv) a plurality of normally retracted, pneumatically energized, clamping pistons translatable perpendicularly toward the jacking platform securing the PC board against the jacking platform preventing it from bending and buckling as the shear blade carried by the sliding carriage chisels components from the board's surface. The sliding carriage and the jacking platform are hydraulically reciprocated within the frame respectively by separate hydraulic circulation loops supplied from a common pump source. The shear blade presents a chisel edge establishing the shearing plane of the machine and an inclined top surface. A plurality of proximity switches are positioned adjacent the rails carrying the shear carriage for sequentially triggering release of the pneumatic clamping piston as the shear carriage slides down the inclined rails. A plurality vertical notches are cut into the engagement surface of the anvil and into the adjacent section of the jacking platform to provide a plurality of channels or holes for allowing debris sheared off the surface of a PC board, sliding and falling toward the anvil to drop into a collection bin located below the anvil and jacking platform. Protective walls shield operators and loaders from flying components sheared from the boards during operation. A pneumatically energized access port allows operator access to the working throat of the machine between inclined parallel rails above the jacking platform. Electro-pneumatic safety interlocks prevent machine operation when the access port is open.
REFERENCES:
patent: 3991459 (1976-11-01), Rapp
patent: 4586252 (1986-05-01), Faticanti
patent: 5093984 (1992-03-01), Lope
patent: 5214849 (1993-06-01), Jones, Jr.
patent: 5216803 (1993-06-01), Nolan et al.
Catalano Gary W.
Newhouse David E.
Rada Rinaldi I.
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