密封面的研磨是香蕉視頻app下載蘋果版:閥門維修過程中的一項主要工作。一般研(yan)磨時(shi)，可以消除零(ling)件表(biao)面上0.05mm的(de)平面度(du)及(ji)溝紋。若要加(jia)工大于0.05mm的(de)平面度(du)及(ji)溝紋時(shi)，則要先用砂(sha)輪磨削或車床車削后(hou)再進行研(yan)磨加(jia)工。


  研磨可以使(shi)工(gong)件獲得很高的(de)尺(chi)寸精(jing)(jing)度、幾(ji)何形狀精(jing)(jing)度及低的(de)表(biao)面(mian)粗糙(cao)度，但(dan)不能提高工(gong)件各表(biao)面(mian)間的(de)相(xiang)互位置精(jing)(jing)度，通常可達到的(de)尺(chi)寸精(jing)(jing)度為0.001~0.003mm,幾(ji)何形狀精(jing)(jing)度（如平面(mian)度）為0.001mm,表(biao)面(mian)粗糙(cao)度為0.2以下。


1. 研磨的基本原理


  研(yan)磨(mo)(mo)(mo)(mo)(mo)時，研(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)(gong)具上的(de)磨(mo)(mo)(mo)(mo)(mo)料受到(dao)一定的(de)壓力，磨(mo)(mo)(mo)(mo)(mo)料在(zai)磨(mo)(mo)(mo)(mo)(mo)具與工(gong)(gong)件(jian)間做滑(hua)動和(he)(he)滾動，產生(sheng)切(qie)削(xue)和(he)(he)擠壓，每一粒(li)磨(mo)(mo)(mo)(mo)(mo)料不重(zhong)復自己的(de)運(yun)動軌跡，磨(mo)(mo)(mo)(mo)(mo)去工(gong)(gong)件(jian)表(biao)面(mian)一層凸峰，同時潤滑(hua)劑起化(hua)學作用(yong)，很(hen)快(kuai)形成一層氧化(hua)膜。在(zai)磨(mo)(mo)(mo)(mo)(mo)的(de)過(guo)程中，凸峰處的(de)氧化(hua)膜很(hen)快(kuai)磨(mo)(mo)(mo)(mo)(mo)損，而凹谷的(de)氧化(hua)膜受到(dao)保(bao)護，不致繼(ji)續(xu)氧化(hua)。在(zai)切(qie)削(xue)和(he)(he)氧化(hua)交(jiao)替過(guo)程中得(de)到(dao)符合(he)要求的(de)表(biao)面(mian)，所以，研(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程是(shi)物理(li)和(he)(he)化(hua)學合(he)成的(de)結果(guo)。


2. 研磨的分類


  按研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)的干濕(shi)可(ke)分為干研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)和(he)(he)濕(shi)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)兩種(zhong)；按研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)的精(jing)度可(ke)分為粗(cu)(cu)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)、精(jing)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)和(he)(he)拋光；按研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)對象(xiang)可(ke)分為平(ping)面(mian)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)，內、外圓柱研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)，內、外圓錐體研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)，內、外球面(mian)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)和(he)(he)其(qi)他特殊(shu)形狀(zhuang)的研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)等。干研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)方便干凈，粗(cu)(cu)糙度低(di)；濕(shi)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)效率(lv)高。粗(cu)(cu)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)主(zhu)要(yao)(yao)是(shi)得到(dao)正確的尺寸和(he)(he)精(jing)度，精(jing)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)主(zhu)要(yao)(yao)是(shi)降低(di)粗(cu)(cu)糙度。