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超聲波焊接原理

超聲波的産生（六）

電磁振動子

在音頻頻率範圍內，電磁振動器自古以來就被用于磁揚聲器或動態電子束，但在超聲波領域開始使用這種振動器的時間並不長，而且現在也沒有被廣泛使用。

作爲可動線圈型振蕩器，St.Clair爲用于煙道內集座而設計的最著名。這在本質上與動態揚聲器是相同的原理，作爲振動體，在其共振振動頻率中使用支撐中央的圓硬鋁圓柱，其共振振動頻率fr爲

靈科超聲波

被給予是長度，r是半徑，是波松比，E是模量，是密度，Clair時r=7.6cm,=13cm，所以f是17kc /s。

如圖14所示，振動體Z的下部呈圓形突起，充當一台機器的語音線圈，但驅動電流不直接通過該線圈，而是通過環繞中心磁極的固定驅動線圈C流動，從而在驅動環上引起電流。在該電流與磁場的相互作用下，振動體受力。在空氣中使用該振蕩器時，其諧振相當尖銳，因此驅動振動頻率必須精確地與之匹配。

而且随着振动，由于发热等原因，振动体的谐振振动频率会稍有变化，因此必须使振荡电路的振动频率自动跟随振动频率。为此，通过pick up振动体的振动来控制振荡电路。

這種振蕩器的等效電路類似于動態揚聲器。由于諧振時機械阻抗僅爲電阻分rm，因此動阻抗Rm爲

靈科超聲波

B是gap的磁通密度，是驅動環的長度，n是驅動線圈的機數。爲了提高電氣效率，R_m必須變大，rm必須變小。rm的內容是中必部分支承産生的電阻，振動體的內摩擦和寬度射電阻，重要的是減少支承部分的電阻。

在St.Clair的装置中，n=3.2Ω，B=12500 gauss，共振时（空气中）气味R_m=7.37Ω，制動電阻r₀=44.7，機電轉換效率69.5%，機械聲學轉換效率43.0%，整體效率30%。

磁致伸縮振蕩器和動圈式振蕩器的驅動電源有時不是真空管振蕩器，而是交流發電機。

以上就是東莞靈科超聲波爲大家介紹關于超聲波焊接機的相關信息，如果大家對焊接設備需要更深一步的了解，歡迎致電公司電話：0756-8626887，或者打開公司官網：/，我们很乐意为大家服务！

靈科超聲波坚持自主研发，最大力度投入研发设计，拥有一支近30年的研发制造团队，发明创造170余项专利新技术。主要品牌有LINGGAO灵高、LINGKE灵科、SHENGFENG声峰等。广泛运用在医疗器械、电子器材、打印耗材、塑料、无纺布、包装、汽配等多个领域，为海内外各行业、企业提供了大量稳定性强的优质超聲波塑焊設備及應用方案。

超聲波的産生（七）

超聲波的産生（五）

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