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时间:2019-10-22
《数控专业英语1-3》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、课程教案授课时间第3周第1、2节课2009年3月3FI课次3授课方式(请打J)理论课(J)讨论课()实践课()习题课()其他()授课题目(教学章、节或主题):1.1.3ToolingSystemandAutomaticToolChanger1.1.4CuttingFluids教学目的、要求(分掌握、熟悉、了解三个层次):目的:了解要求:理解切削液的作用、分类及其专业英语表达教学内容重点及难点:重点:刀具系统、自动换刀装置及其专业英语表达难点:刀具系统、自动换刀装置及其专业英语表达教具作业思考题课后小结教学基本内容方法
2、及手段一:Newwordsandphrases♦Literaturen•文学(作品人文献♦Tapern・锥形,锥度♦Varyv・改变,变更,使多样化♦Indicatev・指出,显示,象征♦Drumn•鼓,鼓声,鼓形圆桶♦toolmagazine刀具库♦fluid几流动性,流度♦drilling〃•钻孔♦tapping〃•攻丝♦coolant兀•冷冻剂,冷却液,散热剂理论讲授方法及手段教学基木内容♦Emulsion/!・乳状液♦synthetics[用作复]人工合成(绝缘)材料♦stress〃•重压,压力♦chlori
3、ne仏[化]氯♦Biologicaladj•生物学的♦Adverseadj•不利的,敌对的,相反的♦sulfur仏[化]硫磺,硫黄♦metallic奶•金属(性)的♦compatibilityn・[计]兼容性二:question♦Whydoesthetoolholdersusestandardtapers?Itcanbeveryhelpfulinkeepingtoolingcoststoaminimum.♦Whatfunctionisthecuttingfluidinthecuttingzone?Thefuction
4、ofthecuttingfluidis:reducingfrictionandwear,thusimprovingtoollifeandthesurfacefinishoftheworkpiece;coolingthecuttingzone,thusimprovingtoollifeandreducingthetemperatureandthermaldistortionoftheworkpiece;reducingforcesandenergyconsumption;flushingawaythechipsfrom
5、thecuttingzone,andthuspreventingthechipsfrominterferingwiththecuttingprocess,particularlyinoperationssuchasdrillingandtapping;protectingthemachinedsurface.♦Whatdoestheselectionofacuttingfluidshouldinclude?Inselectingacuttingfluid,oneshouldconsiderwhetherthemach
6、inedcomponentwillbesubjecttostressandadverseeffects.Thisconsiderationisimportantparticularlyforcuttingfluidswithsulfurandchlorineadditives.Cuttingfluidsmayalsoaffectadverselythemachinetoolcomponents,thustheircompatibilitywithvariousmetallicandnonmetallicmateria
7、lsinthemachinetoolmustbeconsidered.Theselectionofacuttingfluidshouldalsoincludebiologicalandenvironmentalconsiderations.三、Notes♦Notestheuseoftoolholderswithstandardtapers,afeaturethatcanbevaryhelpfulinkeepingtoolingcoststoaminimum.注意要使用标准锥度,这对保持刀具的最低成木是I•分有益的。教
8、学基木内容方法及手段Forautomatictoolchanger,cuttingtoolsneedtobestoredatthemachiningcentersothatthedesiredtoolcanbeselectedaccordingtothepartprogram.对于自动换刀装置而言,刀具均应存放在加工中心内,以便能根据零件程序从
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