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1、Superabrasivegrindingwheel选用合适的砂轮1.Selectionoftheappropriategrindingwheels对不同的工件材料、不同的加工要求，应选用不同的砂轮。即使磨削同一种工件材料，不同牌号砂轮的磨削比可能相差2~5倍，因此要选用合适的砂轮。Accordingtodifferentworkpiecematerialsandprocessingrequirements,itisnecessarytochoosedifferentgrindingwheels.Evenforthesameworkp
2、iecematerial,theremayalsoexist2-5 timesdifferenceingrindingratioamongthedifferentmodels,soitisofgreatsignificancetochoosetheappropriategrindingwheels.金刚石砂轮是磨削硬质合金、光学玻璃、陶瓷、宝石和石材等高硬度脆性大的非金属材料的最佳磨具。但因金刚石在700℃~800℃时容易碳化，所以它不适于磨削钢料。CBN的硬度稍次于金刚石，但它的热稳定性好(能耐1300℃~1400℃高温)，它不象金
3、刚石那样在高温中会分解，即氧化和石墨化，与铁族元素化学惰性大，热导率高(是刚玉的46倍)，用其制作的砂轮寿命长(可达刚玉砂轮的几十倍到成百倍以上)，是替代刚玉砂轮磨削淬硬钢、高速工具钢、轴承钢、不锈钢、耐热钢和钛合金等高硬度韧性大的金属材料的最佳磨具。Thediamondgrindingwheelistheoptimalabrasivetoolforgrindingthenon-metallicmaterialsfeaturedwithhighhardnessandbrittleness,suchastungstencarbide,o
4、pticalglass,ceramics,gemsandstonematerial.However,duetothecarbonizationcharacterofdiamondin700℃~800℃,soitisnotsuitableforgrindingsteelmaterial.ThehardnessofCBNisslightlyinferiortodiamond,butitsthermalstabilityperformanceisgood,whichcanwithstandtemperaturesupto1300℃~1400
5、℃.Unlikethedecompositionofdiamondinthehightemperature,thatistosay,itisunlikelytogetoxidationandgraphitizationanditis also inert to most chemicalelementsofirongroup.Besides,itisofhighthermalconductivity,whichis46timesthanthatofcorundum.Asaresult,grindingwheelmadeofCBNiso
6、flongerlife(uptoseveraldozenoronehundredtimesthanthecorundumgrindingwheel).Consequently,itisagoodalternativeofcorundumgrindingwheelgrindingofmetalmaterialsofhighhardnessandbrittleness,suchashardenedsteel,high-speedtoolsteel,bearingsteel,stainlesssteel,heat-resistantstee
7、landtitaniumalloys.超硬磨料砂轮的结合剂有树脂、金属、陶瓷、电镀和钎焊等。树脂结合剂砂轮主要用于刃磨刀量具、磨孔、外圆磨及平面磨；金属结合剂砂轮用于切入磨削、光学曲线磨床的成形磨、刃磨单刃刀具、磨削小钻头的螺旋槽，也适用于电解磨削；陶瓷结合剂砂轮的磨削效率高，形状保持性好，耐用度高，易于修整，砂轮使用寿命长，并因陶瓷结合剂本身有良好的化学稳定性，耐热、耐油、耐酸碱的侵蚀，可适应各种磨削液，磨削成本低，因而目前已成为高效、高精度磨削的首选磨具；电镀砂轮适于高速精磨和成形磨，也适于孔的高效磨削(湿磨)和在坐标磨床上使用；
8、钎焊砂轮适于超高速磨削。Thebondtypesofthesuperabrasivegrindingwheelsincluderesin,metal,vitrifiedandelectroplateandvacuumbr
