一(yi)、功率(lv)(lv)的選(xuan)(xuan)(xuan)(xuan)擇(ze) 超聲波清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)效(xiao)果(guo)不一(yi)定(ding)與(yu)(功率(lv)(lv)×清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)時(shi)(shi)(shi)(shi)(shi)間(jian))成正比,有時(shi)(shi)(shi)(shi)(shi)用(yong)(yong)小功率(lv)(lv),花費很(hen)(hen)長(chang)時(shi)(shi)(shi)(shi)(shi)間(jian)也(ye)(ye)沒有清(qing)(qing)(qing)(qing)除(chu)污垢(gou)。而如果(guo)功率(lv)(lv)達到(dao)(dao)一(yi)定(ding)數值,有時(shi)(shi)(shi)(shi)(shi)很(hen)(hen)快便(bian)將污垢(gou)去除(chu)。若選(xuan)(xuan)(xuan)(xuan)擇(ze)功率(lv)(lv)太(tai)大,空化(hua)(hua)強度將大大增加(jia),清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)效(xiao)果(guo)是提高了,但這(zhe)時(shi)(shi)(shi)(shi)(shi)使(shi)(shi)較精密的零(ling)(ling)件也(ye)(ye)產生(sheng)蝕點(dian),得不償(chang)失(shi),而且清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)缸底部振動(dong)板處空化(hua)(hua)嚴重(zhong),水(shui)(shui)(shui)點(dian)腐(fu)(fu)蝕也(ye)(ye)增大,在(zai)采用(yong)(yong)三氯乙烯等有機(ji)溶(rong)劑時(shi)(shi)(shi)(shi)(shi),基本(ben)上(shang)沒有問(wen)題,但采用(yong)(yong)水(shui)(shui)(shui)或水(shui)(shui)(shui)溶(rong)性清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)液(ye)(ye)時(shi)(shi)(shi)(shi)(shi),易(yi)于受到(dao)(dao)水(shui)(shui)(shui)點(dian)腐(fu)(fu)蝕,如果(guo)振動(dong)板表面已受到(dao)(dao)傷痕(hen),強功率(lv)(lv)下水(shui)(shui)(shui)底產生(sheng)空化(hua)(hua)腐(fu)(fu)蝕更(geng)嚴重(zhong),因此要(yao)按實際使(shi)(shi)用(yong)(yong)情況(kuang)選(xuan)(xuan)(xuan)(xuan)擇(ze)超聲功率(lv)(lv)。 二、頻(pin)(pin)率(lv)(lv)的選(xuan)(xuan)(xuan)(xuan)擇(ze) 超聲清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)頻(pin)(pin)率(lv)(lv)從28kHz到(dao)(dao)120kHz之(zhi)間(jian),在(zai)使(shi)(shi)用(yong)(yong)水(shui)(shui)(shui)或水(shui)(shui)(shui)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)劑時(shi)(shi)(shi)(shi)(shi)由空穴作用(yong)(yong)引起(qi)的物(wu)理(li)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)力顯然(ran)對低頻(pin)(pin)有利,一(yi)般(ban)(ban)使(shi)(shi)用(yong)(yong)28-40kHz左右。對小間(jian)隙、狹縫(feng)、深(shen)孔(kong)的零(ling)(ling)件清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi),用(yong)(yong)高頻(pin)(pin)(一(yi)般(ban)(ban)40kHz以上(shang))較好,甚至(zhi)幾百kHz。對鐘(zhong)表零(ling)(ling)件清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)時(shi)(shi)(shi)(shi)(shi),用(yong)(yong)400kHz。若用(yong)(yong)寬帶調頻(pin)(pin)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi),效(xiao)果(guo)更(geng)良好。 三、清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)籃(lan)的使(shi)(shi)用(yong)(yong) 在(zai)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)小零(ling)(ling)件物(wu)品時(shi)(shi)(shi)(shi)(shi),常(chang)使(shi)(shi)用(yong)(yong)網籃(lan),由于網眼要(yao)引起(qi)超聲衰減,要(yao)特別引起(qi)注意。當頻(pin)(pin)率(lv)(lv)為28khz時(shi)(shi)(shi)(shi)(shi)使(shi)(shi)用(yong)(yong)10mm以上(shang)的網眼為好。 四、清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)液(ye)(ye)溫度的選(xuan)(xuan)(xuan)(xuan)擇(ze) 水(shui)(shui)(shui)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)液(ye)(ye)最適宜的清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)溫度為40-60℃,尤(you)其(qi)在(zai)天冷時(shi)(shi)(shi)(shi)(shi)若清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)液(ye)(ye)溫度低空化(hua)(hua)效(xiao)應差,清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)效(xiao)果(guo)也(ye)(ye)差。因此有部分(fen)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)機(ji)在(zai)清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)缸外邊繞上(shang)加(jia)熱電熱絲進(jin)行溫度控制(zhi),當溫度升高后(hou)空化(hua)(hua)易(yi)發生(sheng),所(suo)以清(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)...
發(fa)布時(shi)間:
2020
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06
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18
瀏覽次數(shu):139