Method and system for optimized vibration welding

Details Method and system for optimized vibration welding Method and system for optimized vibration welding

2009-04-22

2010-10-12

Stoner, Kiley (Department: 1793)

Metal fusion bonding

Process

With condition responsive, program, or timing control

C228S001100, C228S002100, C228S008000, C228S110100, C228S112100

Reexamination Certificate

active

07810699

ABSTRACT:
A method of minimizing mechanical resonance in an assembly during formation of a vibration-welded joint therein includes positioning work pieces such that they are directly adjacent to each other, and generating a set of control signals that cause one or more sonotrode weld heads to vibrate. A waveform characteristic of a mechanical oscillation of the sonotrode(s) and weld head(s) is varied to minimize the mechanical resonance occurring in the assembly, such as a multi-cell battery for a vehicle. An apparatus for forming the welded joint includes at least one sonotrode having a weld head or heads formed integrally therewith, and a weld controller. The controller is connected to a converter, sonotrode(s), and weld head(s), with the mechanical oscillation occurring in the sonotrode(s) and weld head(s). Variation of the control signals during formation of the welded joint varies a waveform characteristic of the mechanical oscillation, thus minimizing the mechanical resonance.

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