Electric heating – Metal heating – For bonding with pressure
Patent
1996-04-01
1998-08-04
Wong, Peter S.
Electric heating
Metal heating
For bonding with pressure
219 89, 219 868, B23K 932, B23K 928
Patent
active
057897190
ABSTRACT:
An improved welding apparatus and method of use including a pair of opposed electrodes mounted on arms which are fixed against outward displacement during the application of the welding current. One of the arms includes a cylinder for moving an electrode to and away from the work piece. The cylinder includes a pilot operated check valve which permits a one-way flow of hydraulic fluid while the weld current is applied. The check valve prevents movement of the electrode away from the work piece during expansion of the weld nugget, however, permits inward movement of the electrode after the nugget is softened.
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Beach Chuck
Hallack Michael L.
Pary James
Stiebel Ariel
Milco Manufacturing Co.
Patel Rajnikant B.
Wong Peter S.
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