Ultrasonic welding

Details Ultrasonic welding Ultrasonic welding

1985-11-13

1987-09-29

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

73582, 73588, 156 731, 156366, 156378, 1565801, 228 11, 228103, 228110, B29C 6508, G01N 2900

Patent

active

046967087

ABSTRACT:
The ultrasonic energy applied to a workpiece to be welded in an ultrasonic welding operation, over a predetermined welding time, is measured by processing the output of a load cell beneath the workpiece to produce a signal voltage for comparison with a predetermined reference voltage corresponding to the accumulated ultrasonic energy that should have been applied to the workpiece during said predetermined time to satisfactorily weld the workpiece. A one-shot timer is started at the commencement of the welding operation. If the comparison reveals that signal voltage has reached the reference voltage before the timer has run out, a success signal is generated to indicate the completion of the welding operation.

REFERENCES:
patent: 3056192 (1962-10-01), Jones
patent: 3573781 (1971-04-01), Shoh
patent: 3965726 (1976-06-01), Vahaviolos
patent: 4004456 (1977-01-01), Vahaviolos
patent: 4007631 (1977-02-01), Saifi et al.
patent: 4024522 (1977-05-01), Clark et al.
patent: 4373653 (1983-02-01), Salzer et al.

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