组合体的尺寸标注DimensioningComposite.pptx

组合体的尺寸标注DimensioningCompositeSolids主讲人：李帅

教学目标Teachingobjectives1.了解基本立体的定形尺寸2.熟悉各类尺寸的含义3.掌握组合体的尺寸标注UnderstandthefixeddimensionsofbasicsolidsFamiliarwiththemeaningofvarioussizesMasteringtheDimensioningofCompositeBodies

123目录CONTENTS基本立体的尺寸标注尺寸的分类组合体的尺寸标注DimensioningofbasicsolidsClassificationofdimensionsDimensioningCompositeSolids4思考题Reflectionquestions

1基本立体的尺寸标注DimensioningofbasicsolidsONE

长long宽wid高high曲面立体curvedsolid高度height直径diameter平面立体planebody

2尺寸的分类ClassificationofdimensionsTWO

完整的图样尺寸Completedrawingdimensions

完整的图样尺寸Completedrawingdimensions结构尺寸structuresize相对位置尺寸Relativepositionsize

尺寸的分类Classificationofdimensions定形尺寸sizedimension定位尺寸Positioningdimensions总体尺寸Overalldimensions

确定机件各组成部分形状和大小Determinetheshapeandsizeofeachcomponentofthemachine定形尺寸Shapingsize

6six32thirty-two确定组合体各组成部分之间的相对位置关系Determinetherelativepositionalrelationshipbetweenthecomponentsofthecombination定位尺寸locationsize

底面尺寸基准Dimensionreference对称面重要端面Importantendface定位尺寸标注的起点Positionthestartingpointofthedimension长度方向尺寸基准Lengthdirectiondimensionreference长度方向宽度准Lengthdirectionandwidthaccuracy高度方向宽度准Heightdirectionandwidthaccuracy

确定组合体长、宽、高最大外形尺寸Determinethemaximumexternaldimensionsofthecombinationbodyintermsoflength,width,andheight总体尺寸populationsize60sixty6six22twenty-two＋＋＋＋＋＋32thirty-two

3组合体的尺寸标注DimensioningCompositeSolidsTHREE

1one形体分析shapeanalysis

圆筒cylinder底板floor支撑板Supportplate肋板Ribplate

2two定型尺寸Fixedsize1one形体分析shapeanalysis

肋板Ribplate支撑板Supportplate圆筒cylinder底板floorfourteentwenty-fourtwosixtwothirteensixthirty-sixsixtyforty-twotwenty-two

3three定位尺寸Positioningdimensions2two1one定型尺寸Fixedsize形体分析shapeanalysis

高度方向基准Heightdirectionreference32thirty-two长度方向基准Lengthdirectionreference48forty-eight宽度方向基准Widthdirectionreference16sixteenfourteentwosixtwothirteensixthirty-sixsixtyforty-twotwenty-twosix

4four总体尺寸Overalldimensions3three定位尺寸Positioningdimensions2two1one定型尺