Fundamentals of Engineering Drawing工程制图基础 全套课件（英文版）（上）PPT资料.pptx

Fundamentals of Engineering Drawing工程制图基础 全套课件（英文版）（上）PPT资料.pptx

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出版社国际合作出部版社国际合作部工程制图基础工程制图基础出版社国际合作部Anewmachine，orproductmustexistinthemindoftheengineerordesignerbeforeitbecomesareality.Thisoriginalconceptorideaisusuallyplacedonpapercalleddrawingpapertoformengineeringdrawing.Theengineersordesignerscancommunicateeachotherwiththeengineeringdrawing.Chapter1BasicSkillsofEngineeringDrawing出版社国际合作部1.1DrawingInstrument1.1.1DrawingpencilsAgooddrawingbeginswithaproperdrawingpencilanditscorrectuse.Pencilgraderangesfromthehardest,9H,tothesoftest,7B.GradeH,HBandBaremostfrequentlyusedbecauseoftheirmediumhardness.Thechoiceoftheproperdrawingpencilsdependsonpersonalpreferenceandthedrawingpaperused.出版社国际合作部Fig.1.1Sharpendrawingpencilscorrectly.出版社国际合作部1.1.2PencileraserFig.1.2Erasingshield.出版社国际合作部1.1.3Erasingshield擦图片1.1.4Triangles三角板Fig.1.3Triangle.出版社国际合作部Fig.1.4Parallellineconstruction出版社国际合作部Fig.1.5PerpendicularlineConstruction.出版社国际合作部1.1.5Compass圆规Fig.1.6Compass.出版社国际合作部1.1.6Divider分规Fig.1.7Divider.出版社国际合作部Fig.1.8Usingdivider.出版社国际合作部1.1.7Drawingboard图板Fig.1.9Drawingboard.出版社国际合作部1.1.8Tsquare丁字尺Fig.1.10T-square.出版社国际合作部Fig.1.11Drawingahorizontalline.出版社国际合作部Fig.1.12Drawingaverticalline.出版社国际合作部1.2（ProvisionsofChineseNationalStandardofTechnicalDrawing（机械制图国家标准的规定）1.2.1Drawingpaper（GB/T146891993）1.2.1.1Drawingpapersize（图幅）Thesizesofthedrawingpaperstogetherwiththeirlengths,widthsandletterdesignations,arelistedinChart1.1.出版社国际合作部Chart1.1Papersize出版社国际合作部1.2.1.2Paperframeformat（图框格式）Fig.1.13Formatofpaperframe.出版社国际合作部1.2.2Titleblock（标题栏）Fig.1.14Paperslocatedvertically.出版社国际合作部Fig.1.15Titleblock出版社国际合作部1.2.3Measurementunitsforengineering（工程计量单位）1.2.3.1Metricsystem（SI）ofunitsFig.1.16Thecentimeter.出版社国际合作部1.2.3.2EnglishsystemofunitsFig.1.17Englishunits.出版社国际合作部1.2.4Scales（比例）（GB/T146901993）Chart1.2Scales出版社国际合作部1.2.5Characters（字体）（GB/T146911993）1.Heightandnumberofacharacter（字高和字号）2.Chinesecharacters（汉字）Fig.1.18Chinesecharactersinfontof“长仿宋体”.出版社国际合作部Chart1.3BasicstrokeinChinesecharactersandthewittenorders出版社国际合作部1.3BasicstrokeinChinesecharactersandthewittenorders1.2.5.3Lettersandnumbers（字母和数字）Lettersandnumbersmaybewritteninitalic（斜体）orvertical（直体）.Italicsarefrequentlyappliedinengineeringdrawing.ItalicnumbersareshowninFig.1.19;@#@italiccapitalsinFig.1.20;@#@italicsmalllettersinFig.1.21;@#@italicGrecian（希腊的）lettersinFig.1.22andRomannumeralsinFig.1.23.出版社国际合作部Fig.1.19Italicnumbers.Fig.1.20Italiccapitals.出版社国际合作部Fig.1.21Italicsmallletters.Fig.1.22ItalicGrecianletters.出版社国际合作部Fig.1.23ItalicRomannumerals.1.2.6Drawinglines（图线）（GB/T174501998）Eachlineonanengineeringdrawinghasadefinitemeaningandisdrawninacertainway.Chart1.4showsvariouslinesrequiredintheengineeringdrawing.出版社国际合作部Chart1.4Linesrequiredinengineeringdrawing出版社国际合作部Fig.1.24Applicationofalltypesoflines.出版社国际合作部Fig.1.25Correctandincorrectdrawings出版社国际合作部1.2.7Dimension（尺寸）1.2.7.1Dimensioncomposition（尺寸的组成）Fig.1.26Dimensionterms.出版社国际合作部Fig.1.27Arrowheads.出版社国际合作部Fig.1.28Correctandincorrectindimensioning.出版社国际合作部1.2.7.2Commondimensionsymbols（Chart1.5）Chart1.5Commondimensionsymbols出版社国际合作部1.3GeometricConstruction（几何构造）Simplegeometricalstructuresshouldbefamiliartoengineersfortheyoccurfrequentlyinengineeringdrawing.Forexample,howtodrawatangentarc?

@#@orahexagon?

@#@Geometricalgraphicsaretwodimensionalfigureswhicharecomposedofstraightlines,curves,orthecombinationofthem.Geometricconstructionsinthischapterincludetangentarcs,regularpolygons,ellipsesandsoon.出版社国际合作部1.3.1HowtodrawtangentpointsStep1DrawalinetangenttothecirclewithcenterE,whichistangentlineABasshowninFig.1.29（a）.Step2FromcenterE,drawalineperpendiculartotangentlineABtolocatetangentpointT（Fig.1.29（b）.Step3ConnecttwocentersEandDtolocatetangentpointPbetweentwotangentcircles（Fig.1.29（b）.出版社国际合作部Fig.1.29Tangentpoints.出版社国际合作部1.3.2HowtodrawalinetangenttoacirclethroughapointonthegivencircleStep1ArrangeatriangleincombinationwiththeT-square（oranothertriangle）sothatitshypotenusepassesthroughcenterOandpointC.Step2HoldingtheT-squarefirmlyinplace,turnthetriangleaboutitssquarecornerandmoveituntilthehypotenusepassesthroughC.Step3Drawthetangentlinerequiredalongthehypotenuse（Fig.1.30（b）出版社国际合作部Fig.1.30Alinetangenttoacirclethroughapointonacircle.出版社国际合作部1.3.3HowtodrawalinetangenttoacirclethroughapointoutsidethegivencircleStep1ConnectpointsOandP,andthenlocatepointDbybisectingOP（Fig.1.31（b）.Step2WithpointDascenterandODastheradius,drawasemicircletointersectthegivenarctangentpointatT,（Fig.1.31（c）.Ste