Progressive ultrasonic welding system
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United States of America Patent
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-
Jan 29, 1985
Grant Date -
N/A
app pub date -
Apr 12, 1983
filing date -
Apr 12, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of progressively ultrasonically welding together workpieces is provided wherein the spot welds effected are initiated as small points and then progressively grow to full size. The method employs an ultrasonic welding apparatus of the type having a welding tip and a complimentary anvil between which the workpieces to be welded may be inserted. The workpieces are first clamped together and the workpieces 'presqueezed' to disperse any adhesives which may be used between the workpieces. Initial pressure and energy levels are then introduced to 'scrub' the workpieces. Pressure and energy are then synchronously ramped in phase to maximum levels to effect a weld between the workpieces. The welding operation is controlled by control means which permit automatic synchronization of the operation.
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