| 摘要 |
PURPOSE: Simultaneous amplitude and force profiling is provided to improve decrease weld cycle time and increase weld strength with accompanying improvements in cosmetic appearances and weld reliability. CONSTITUTION: A motional amplitude and horn engaging force are varied in accordance with predetermined profiles or in response to process related control signals over the weld cycle. And the motional amplitude and horn engaging force are increased for the initial portion of the weld cycle to accelerate the preheating and melting of workpieces in the region of the weld line to be formed, and then, after this initial portion of the weld cycle, gradually decreased to complete the weld formation. Full control of bond line temperature and squeeze flow of the melt within the weld is provided by simultaneous variation of the motional amplitude and engaging force of the horn. |
