综合固体颗粒介质成形和超声振动塑性成形技术，提出超声激励颗粒介质成形工艺。为了揭示超声激励对板材软模拉深的影响，在AZ31B镁合金板材固体颗粒介质拉深成形中，运用振动频率20 kHz、最大输出功率1.5 kW的超声振动系统对凹模施加激励。研究表明，超声激励促进颗粒介质的流动性及其传递内压性能；超声振动改变板材拉深中的成形规律并有效降低成形载荷，且随着超声振幅的增加，载荷降低比例越高，这是表面效应和体积效应综合作用的结果。
Combining solid granule medium forming technology with ultrasonic vibration plastic forming technology, ultrasonic vibration granule medium forming (UGMF) technologywas proposed. To reveal the effect of ultrasonic vibration on flexible-die deep drawing, an ultrasonic vibration with a frequency of 20 kHz and a maximum output of 1.5 kWwason the solid granule medium deep drawing of AZ31B magnesium alloy sheet.The results revealedthat ultrasonic vibration promotes the pressure transmission performance of the granule medium and the formability of the sheet. The forming load declines with the ultrasonic amplitude during thedrawing process as a result of the combined influence of the “surface effect” and the “softening” of the “volume effect”.
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