Clamping device for inner leads of lead frame

Details Clamping device for inner leads of lead frame Clamping device for inner leads of lead frame

1991-11-21

1993-03-16

Heinrich, Samuel M.

Metal fusion bonding

With means to juxtapose and bond plural workpieces

Wire lead bonder

228 47, B23K 3704

Patent

active

051937336

ABSTRACT:
A clamp device for clamping inner leads of a lead frame includes a clamp fixing plate having a working opening and a plurality of inner lead clamps each made of a plate spring and fixedly mounted to an upper surface of the clamp fixing plate. Each of the inner lead clamps has at an inner end thereof a vertical pressing portion normal to the clamp fixing plate upper surface and extending downward into the working opening of the clamp fixing plate and is adapted to press a group of inner leads. The pressing portion of each inner lead clamp may have a plurality of uniformly spaced cut-out portions so that inner leads are clamped individually. A plurality of spaced bolt holes may be formed around the peripheral edges of the working opening. In this case, a compression coil spring is fitted around a bolt received in each bolt hole between the clamp fixing plate and each corresponding inner lead clamp. The springs urge the inner lead clamp away from the clamp fixing plate so that the inner lead clamps can clamp inner leads in groups or individually by virtue of the resilient force of compression coil springs.

REFERENCES:
patent: 4958762 (1990-09-01), Shimizu et al.
patent: 4979663 (1990-12-01), Sofia et al.
patent: 5035034 (1991-07-01), Cotney

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