Method and apparatus for loading metal leadframes with electroni

Details Method and apparatus for loading metal leadframes with electroni Method and apparatus for loading metal leadframes with electroni

1991-05-15

1992-11-17

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

29564, 295641, 295646, 29711, 29712, 1983452, 198456, H01R 4300, B23P 2300

Patent

active

051632225

ABSTRACT:
A method and apparatus for transferring relatively thin, strip-like workpieces, such as metal leadframe strips to at least one processing or bonding station are proposed. The apparatus essentially comprises a transfer mechanism, a processing or bonding station, an electromotive drive, a first and a second group of electromagnetically, pneumatically or hydraulically operable clamping elements. The first group of the clamping elements is movable relative to the second group of clamping elements fixed to a main carrier of the transfer mechanism. In a first phase of the transfer and feed movement, the electromotive drive is controlled by means of reference geometry data given in dependence upon a particular leadframe and in a second phase of the feed movement by means of dynamic, opto-electronically measured reference data and pulses formed therefrom. The supply movement of the leadframe to the processing or bonding station takes place in a transfer direction (X') at an angle (.alpha.) displaced in a side and plane relative to the main carrier.

REFERENCES:
patent: 3627190 (1971-12-01), Ramsey
patent: 4177554 (1979-11-01), Deveres et al.
patent: 4674670 (1987-06-01), Watanabe et al.

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