Method and apparatus for locating and locking onto workpieces in

Details Method and apparatus for locating and locking onto workpieces in Method and apparatus for locating and locking onto workpieces in

1975-03-12

1976-01-27

Smith, Al Lawrence

Metal fusion bonding

Metallic heat applicator

164DIG1, 164334, 219107, 219152, 228 58, B23K 302, B22D 1904

Patent

active

039347826

ABSTRACT:
Methods for positive displacement casting and/or for positive displacement bonding and, more particularly, for automatically locating the bonding apparatus with respect to the workpieces, locking thereon, and, thereafter forming, on a continuous, reproducible basis, fusion bonds devoid of structural, electrical and cosmetic defects between two or more workpieces by moving a heated electrode into the area to be bonded so as to uniformly heat and melt the portions of the workpieces to be bonded while, at the same time, displacing substantially all of the molten material from the area to be bonded into a storage area or reservoir surrounding the heated electrode where such molten material is maintained in its uniformly heated molten state, and then retracting the electrode so as to permit the molten material to return to the cavity formed by the electrode in the workpieces where such molten material is allowed to cool and solidify, thus forming a flawless bond between the workpieces--thermal or fusion bonds are made in accordance with the methods of the invention by a combination of (1) elevated temperature levels sufficient to melt the material to be bonded, and (2) displacement of the molten material; as contrasted with more conventional techniques and/or apparatus which combine elevated temperature levels and pressure.

REFERENCES:
patent: 1295750 (1919-02-01), Hibbs
patent: 2045523 (1936-06-01), Fassler
patent: 3493035 (1970-02-01), Tiegel
patent: 3547183 (1970-12-01), Clingenpeel
patent: 3598171 (1971-08-01), Schultz
patent: 3668761 (1972-06-01), Buttke
patent: 3767889 (1973-10-01), Sand

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