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1、Outlineofreading讀圖要點Methodsofreading讀圖的方法Exercises練習題ReadingViewsofCompositeSolids組合體的讀圖請點擊相應標題顯示其內容Outlineofreading讀圖要點1.Understandingthemeaningofindividuallinesandotherdrawingelementsoftheview.要讀懂視圖中圖線、線框的含義。(2)Eachclosedloopoflines/curvesrepresents:視圖上每一封閉線框可表示:請點擊鼠標左鍵顯示后面內容(1)Linesandcurves
2、(includingcirculararcs)representthefollowing:視圖上圖線有直線、曲線(包括圓弧)，它們表示:B1)Theprojectionofaccumulationplanes.具有積聚性表面的投影。2)Theprojectionofintersectionoftwoplanes.兩表面交線的投影。3)Theprojectionoftheoutlineofcylindricalsurfaces.曲面輪廓線的投影。AC1)Theprojectionofaplane.平面的投影。2)Theprojectionofacurvedsurface.曲面的投影
3、。3)Theprojectionofacurvedsurfaceanditstangentplane.曲面與其切平面的投影。IⅡⅢOutlineofreading讀圖要點2.Readingseveralviewssimultaneously.要幾個視圖聯(lián)系起來讀。Oneviewmaynotbeabletorevealgeneralspaceshapeofcompositesolids.一個視圖是不能反映物體的確切形狀的,故讀圖時不可孤立地只看一個視圖。Example1.Thinkoftheleftviewfromthegivenfrontview.根據(jù)主視圖,想象其側視圖是何形狀。請點
4、擊鼠標左鍵顯示后面內容Whenreadingdrawings,weshouldnotmakeaconclusionafterreadingonlyoneortwoviews.Weshouldcarefullycompareallviewsandmakeaconclusionuntiltheycanbefullyexplainedfollowingtheprinciplesofprojection.在讀圖過程中切忌看了一、二個視圖就下結論，各視圖要反復對照，直至都符合投影規(guī)律時,才能最后下結論。（注意:二個視圖有時也不能反映物體的確切形狀）Example2.Thinkoftheleftv
5、iewfromgivenviews.根據(jù)主、俯視圖,想象其側視圖是何形狀。請點擊鼠標左鍵顯示后面內容Outlineofreading讀圖要點2.Readingseveralviewssimultaneously.要幾個視圖聯(lián)系起來讀。3.Readingstartsfromaviewthatmostreflectsshapecharacteristics.要從反映形狀特征的視圖讀起。Whilereading,wemustpayspecialattentiontothecharacterviewforidentifyingthebasicshapeofthecompositesolid.看
6、圖時，應抓住特征視圖，確定組合體基本形狀。4.Analyzingrelativepositionandintersectionofneighboringsurfaces.要認真分析相鄰表面間的相互位置和交線。請點擊鼠標左鍵顯示后面內容Outlineofreading讀圖要點Whilereading,weshouldalsopayattentiontorelativelocations,suchasfront-and-back,tall-and-lowandintersectionlocations.讀圖時，要注意分析相鄰面的前后、高低和相交等相互位置。Example3.Thinkof
7、thesolidshapefromthegiventopview.根據(jù)俯視圖想象該立體的結構形狀。ABCThegeneralprocedureofreadingisasfollows:firstreadtheprimarycomponent,thenreadtheothercomponents;firstreadeasycomponents,thenreaddifficultcomponents;firstreadtheoverallshape
