应用声学
應用聲學
응용성학
APPLIED ACOUSTICS
2010年
3期
222-226
,共5页
高频调制电弧%超声%焊缝组织细化
高頻調製電弧%超聲%銲縫組織細化
고빈조제전호%초성%한봉조직세화
High frequency modulated arc%Ultrasonic%Welding structure refinement
以等离子体电弧作为声源,利用高频电流进行调制,激发电弧可以产生超声波.研究了高频调制电弧的激发特性和声场特征,发现调制电弧所发射超声波在激励频段内呈现平坦的幅频特性,激励电流是影响电弧超声强度的主要因素,声压幅值与电弧等离子体流力的变化量成正比,声场呈现轴向强两侧弱的特征.同时介绍了利用电弧激发超声波在改善焊缝组织性能方面的应用.
以等離子體電弧作為聲源,利用高頻電流進行調製,激髮電弧可以產生超聲波.研究瞭高頻調製電弧的激髮特性和聲場特徵,髮現調製電弧所髮射超聲波在激勵頻段內呈現平坦的幅頻特性,激勵電流是影響電弧超聲彊度的主要因素,聲壓幅值與電弧等離子體流力的變化量成正比,聲場呈現軸嚮彊兩側弱的特徵.同時介紹瞭利用電弧激髮超聲波在改善銲縫組織性能方麵的應用.
이등리자체전호작위성원,이용고빈전류진행조제,격발전호가이산생초성파.연구료고빈조제전호적격발특성화성장특정,발현조제전호소발사초성파재격려빈단내정현평탄적폭빈특성,격려전류시영향전호초성강도적주요인소,성압폭치여전호등리자체류력적변화량성정비,성장정현축향강량측약적특정.동시개소료이용전호격발초성파재개선한봉조직성능방면적응용.
High frequency current is used to modulate plasma arc and ultrasonic wave is excited successfully.The characteristics of the excited ultrasonic field are studied.The results show that the amplitude-frequency response characteristics of the ultrasonic emission is flat, and that the exciting current is the main factor influencing the ultrasonic power and the sound pressure depends on the variation of arc plasma stream force.Experimental study of the welding structure indicates refmement by the ultrasonic emission of the modulated arc.
