密封面的研磨是香蕉視頻app蘋果:閥門維修過程中的一項主要工作。一般研(yan)磨時(shi)，可以(yi)消除零件表(biao)面上0.05mm的(de)平面度(du)及溝紋(wen)。若要(yao)加(jia)工大于0.05mm的(de)平面度(du)及溝紋(wen)時(shi)，則要(yao)先用砂輪(lun)磨削(xue)或車床車削(xue)后再進行研(yan)磨加(jia)工。

  研磨可以(yi)使工(gong)(gong)件(jian)獲得很高(gao)的(de)(de)尺(chi)寸精度(du)(du)、幾何形狀精度(du)(du)及(ji)低的(de)(de)表面(mian)(mian)(mian)粗糙(cao)(cao)度(du)(du)，但不(bu)能(neng)提高(gao)工(gong)(gong)件(jian)各表面(mian)(mian)(mian)間的(de)(de)相互位置精度(du)(du)，通常可達到的(de)(de)尺(chi)寸精度(du)(du)為0.001~0.003mm,幾何形狀精度(du)(du)（如平面(mian)(mian)(mian)度(du)(du)）為0.001mm,表面(mian)(mian)(mian)粗糙(cao)(cao)度(du)(du)為0.2以(yi)下。

1. 研磨的(de)基本原(yuan)理

  研(yan)磨(mo)時，研(yan)磨(mo)工具(ju)(ju)上(shang)的(de)磨(mo)料受(shou)到一(yi)定(ding)的(de)壓(ya)力，磨(mo)料在磨(mo)具(ju)(ju)與工件(jian)間做(zuo)滑(hua)動(dong)和(he)滾動(dong)，產(chan)生(sheng)切削和(he)擠壓(ya)，每一(yi)粒(li)磨(mo)料不重復自己的(de)運動(dong)軌跡，磨(mo)去工件(jian)表面(mian)一(yi)層凸峰，同時潤滑(hua)劑起化(hua)學作用，很快形成一(yi)層氧化(hua)膜(mo)(mo)。在磨(mo)的(de)過(guo)程(cheng)中(zhong)，凸峰處的(de)氧化(hua)膜(mo)(mo)很快磨(mo)損，而凹(ao)谷的(de)氧化(hua)膜(mo)(mo)受(shou)到保(bao)護(hu)，不致繼續氧化(hua)。在切削和(he)氧化(hua)交替過(guo)程(cheng)中(zhong)得到符合要求(qiu)的(de)表面(mian)，所(suo)以，研(yan)磨(mo)過(guo)程(cheng)是(shi)物理和(he)化(hua)學合成的(de)結果。

2. 研磨的(de)分類

  按(an)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)的(de)干(gan)濕可分(fen)(fen)為干(gan)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)和(he)濕研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)兩(liang)種；按(an)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)的(de)精度(du)(du)可分(fen)(fen)為粗(cu)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)、精研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)和(he)拋光；按(an)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)對象(xiang)可分(fen)(fen)為平面研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)，內、外(wai)圓柱研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)，內、外(wai)圓錐體研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)，內、外(wai)球(qiu)面研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)和(he)其他特(te)殊形(xing)狀的(de)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)等。干(gan)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)方(fang)便干(gan)凈，粗(cu)糙度(du)(du)低；濕研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)效率高(gao)。粗(cu)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)主要是得(de)到正確(que)的(de)尺寸和(he)精度(du)(du)，精研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)主要是降低粗(cu)糙度(du)(du)。