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US 4,496,095 AGranted
Progressive ultrasonic welding system
AssigneeFairchild Industries, Inc.
InventorsTheodore A. Renshaw, Albert Sarrantonio
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AssigneeFairchild Industries, Inc.
InventorsTheodore A. Renshaw, Albert Sarrantonio
Estimating the term…
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.
A method of welding workpieces using ultrasonic vibratory spot welding apparatus of the type having welding elements including a welding tip and a complimentary anvil both mounted on a welding frame and between which the workpieces are adapted to be inserted for welding, said welding apparatus further including clamping means for clamping together the workpieces to be welded and maintaining alignment thereof during the welding operation, said method comprising the steps of:
A method of welding workpieces using ultrasonic vibratory spot welding apparatus of the type having welding elements including a welding tip and a complimentary anvil both mounted on a welding frame and between which the workpieces to be welded are adapted to be inserted for welding and clamping means for clamping together the workpieces to be welded prior to effecting the welding operation and maintaining alignment during said operation, said method comprising an automated and synchronous method for effecting the following steps of a timed weld interval:
Ultrasonic welding system of the type having a welding tip and a complimentary anvil between which workpieces to be welded are adapted to be introduced for welding by introducing high frequency ultrasonic energy into said workpieces to effect a weld therebetween and further including clamping means adapted to clamp said workpieces together prior to welding and maintain alignment of said workpieces during the welding interval, said system including synchronous control means for effecting operation of said system during a timed weld interval, said control means comprising a functional linear ramp generator and modulator adapted to synchronously control the movement of said anvil and said clamping means and the amount of ultrasonic energy introduced into said workpieces.
Dependencies are inferred from the claim text.