组合体尺寸注法.pptx

《组合体尺寸注法.pptx》由会员分享，可在线阅读，更多相关《组合体尺寸注法.pptx（23页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、 ReasonablenessReasonableness:The dimensions must be marked according to the requirements of The dimensions must be marked according to the requirements of design,manufacture and test.design,manufacture and test.合理合理：所注尺寸要符合设计、制造和检验等要求。所注尺寸要符合设计、制造和检验等要求。Basic requirements for dimensioningBasic requ

2、irements for dimensioning标注尺寸的基本要求 CorrectnessCorrectness:There should be no mistake with all dimensions and the national There should be no mistake with all dimensions and the national standard (GB)should be observed.standard (GB)should be observed.正确正确：尺寸无误，注法符合国标规定。尺寸无误，注法符合国标规定。CorrectnessCorrec

3、tness，integrityintegrity，clarityclarity，reasonableness.reasonableness.正确、完整、清晰、合理正确、完整、清晰、合理。请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容 IntegrityIntegrity:The dimension must fully define the size of the part and the relativeThe dimension must fully define the size of the part and the relative locations of individua

4、l components.It can not be skipped,nor repeated.locations of individual components.It can not be skipped,nor repeated.完整完整：所注尺寸必须能完整确定零件的形状大小及位置所注尺寸必须能完整确定零件的形状大小及位置,不遗漏不遗漏,不重复。不重复。ClarityClarity :The arrangement of the dimensions should be clear and clean.The arrangement of the dimensions should be

5、 clear and clean.清晰清晰：尺寸布局清晰，便于看图。尺寸布局清晰，便于看图。1.Basic requirements for dimensioning 1.Basic requirements for dimensioning 标注尺寸的基本要求标注尺寸的基本要求第1页/共23页4)4)Each dimension of the part should mark on the drawing only once.It should also Each dimension of the part should mark on the drawing only once.It sh

6、ould also be marked on a drawing that most clearly represents the corresponding constructs.be marked on a drawing that most clearly represents the corresponding constructs.机件的每一尺寸机件的每一尺寸,在图上只标注一次在图上只标注一次,应标注在反映该结构最清晰的图形上。应标注在反映该结构最清晰的图形上。1)1)The true size of the spare part is based on the dimension

7、marked on the drawing The true size of the spare part is based on the dimension marked on the drawing and has nothing to do with the size of the drawing and the accuracy of the drawings.and has nothing to do with the size of the drawing and the accuracy of the drawings.机件的真实大小应以图样上所注的尺寸数值为依据，与图形的大小无

8、关。机件的真实大小应以图样上所注的尺寸数值为依据，与图形的大小无关。2)There is no need to mark the unit of dimensions if it is“mm”.One only needs to 2)There is no need to mark the unit of dimensions if it is“mm”.One only needs to mark the dimensions if the units are not“mm”,such as“cm”or“mark the dimensions if the units are not“mm”,

9、such as“cm”or“3030”.”.图样中尺寸以毫米为单位时图样中尺寸以毫米为单位时,不需标注计量单位的代号或名称。若采用其不需标注计量单位的代号或名称。若采用其他单位他单位,则必须注明相应的计量单位的代号或名称则必须注明相应的计量单位的代号或名称,如如cm(cm(厘米厘米)、30(30(度度)等。等。请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容Basic requirements for dimensioningBasic requirements for dimensioning标注尺寸的基本要求2.Basic rules of dimensioning 2.Basic r

10、ules of dimensioning 标注尺寸的基本规定标注尺寸的基本规定 3)3)All dimensions marked on the drawing are dimensions of the final part.OtherwiseAll dimensions marked on the drawing are dimensions of the final part.Otherwise one needs to clearly indicate on the drawing.one needs to clearly indicate on the drawing.所标注的尺寸数

11、字所标注的尺寸数字,应为该图样所示机件的最后完工的尺寸应为该图样所示机件的最后完工的尺寸,否则应另加说明。否则应另加说明。第2页/共23页383.Dimension construction Dimension construction 尺寸的组成尺寸的组成 18 Dimension line is usually drawn perpendicular to the Dimension line is usually drawn perpendicular to the extension lines and the extension lines should extend extensi

12、on lines and the extension lines should extend beyond the terminal of dimension line for about 2 beyond the terminal of dimension line for about 23mm.3mm.一般与尺寸线垂直一般与尺寸线垂直,超出尺寸线终端超出尺寸线终端2 2 3 3mmmm。Extension line 尺寸界线尺寸界线1428999999An extension line is drawn with a continuous thin line.An extensionAn

13、extension line is drawn with a continuous thin line.An extension line originates from a feature outline,an axis line,or a center line.line originates from a feature outline,an axis line,or a center line.为细实线为细实线,应从轮廓线、轴线或对称中心线处引出。应从轮廓线、轴线或对称中心线处引出。9Basic requirements for dimensioningBasic requiremen

14、ts for dimensioning标注尺寸的基本要求Dimension line Dimension line and its terminalsand its terminals 尺寸线及尺寸线及其终端其终端 It must be drawn using continuous thin line and can not be in It must be drawn using continuous thin line and can not be in coincident with any existing lines or drawn as extension of any line

15、s.coincident with any existing lines or drawn as extension of any lines.为细实线为细实线,不可与轴线重合或注在其他线的延长处。不可与轴线重合或注在其他线的延长处。The dimension line must be parallel with line segment being The dimension line must be parallel with line segment being dimensioned.The distance between the dimension line and the dim

16、ensioned.The distance between the dimension line and the nearest feature should be about 8 nearest feature should be about 810mm.All distances between 10mm.All distances between neighboring dimension lines should be as consistent as possible neighboring dimension lines should be as consistent as pos

17、sible and are usually between 6 and are usually between 68mm.8mm.与轮廓线平行与轮廓线平行,与轮廓线的间隔为与轮廓线的间隔为8 81010mmmm,二尺寸线间距约二尺寸线间距约6 68 8mmmm。Arrowhead is equal to 1b thick and 4b length.Arrowhead is equal to 1b thick and 4b length.（b=the continuous thick lineb=the continuous thick line）尺寸箭头粗等于尺寸箭头粗等于1b,1b,长为长

18、为4 4b b左右。（左右。（b=b=粗实线粗）粗实线粗）Dimension text 尺寸数字尺寸数字18 3822 Dimension text should be marked above or left the dimension line.Dimension text should be marked above or left the dimension line.All linear dimensions should be marked heading upwards for horizontal dimensions,All linear dimensions should

19、be marked heading upwards for horizontal dimensions,heading towards the left for vertical dimensions.heading towards the left for vertical dimensions.线性尺寸线性尺寸数字数字注在尺寸线上方或左方注在尺寸线上方或左方,字头向上或左字头向上或左,垂直尺寸线。垂直尺寸线。Dimension text can also be entered in the breaking space of the Dimension text can also be e

20、ntered in the breaking space of the dimension dimension line.line.尺寸数字不得被图线穿过尺寸数字不得被图线穿过,应中断图线或将其引出填写。应中断图线或将其引出填写。When there is When there is 3030 for horizontal line,dimension text can also be for horizontal line,dimension text can also be placed somewhere else using a leader line.placed somewhere

21、 else using a leader line.尽量避免在与垂直方向成尽量避免在与垂直方向成3030 范围注尺寸范围注尺寸,当无法避免时当无法避免时,可引出注。可引出注。请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容2222 Orientation of linear dimensions第3页/共23页 One usually needs to mark all dimensions of length,width and height.For One usually needs to mark all dimensions of length,width and height.F

22、or body of revolution,it only needs to mark its radial dimension(the diameter body of revolution,it only needs to mark its radial dimension(the diameter symbol“symbol“”is added before the dimension figure)and axial dimension.”is added before the dimension figure)and axial dimension.标注基本体的尺寸标注基本体的尺寸,

23、一般要注出长、宽、高三个方向的尺寸。对于回转一般要注出长、宽、高三个方向的尺寸。对于回转 体体,通常只要注出径向尺寸通常只要注出径向尺寸(直径尺寸数字前加符号直径尺寸数字前加符号“”)和轴向尺寸。和轴向尺寸。1.Dimensioning the basic part1.Dimensioning the basic part 基本体的尺寸注法基本体的尺寸注法请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容Dimensioning of basic body,cutting and interpenetration bodiesDimensioning of basic body,cuttin

24、g and interpenetration bodies常见基本体、截切体及相贯体的尺寸注法常见基本体、截切体及相贯体的尺寸注法第4页/共23页Dimensioning of basic body,cutting and Dimensioning of basic body,cutting and interpenetration bodiesinterpenetration bodies常见基本体、截切体及相贯常见基本体、截切体及相贯常见基本体、截切体及相贯常见基本体、截切体及相贯体的尺寸注法体的尺寸注法体的尺寸注法体的尺寸注法2.Dimensioning of subtraction/c

25、utting type solid 2.Dimensioning of subtraction/cutting type solid 截切体的尺寸注法截切体的尺寸注法 When dimensioning cutting type composite solid,there are also dimensions When dimensioning cutting type composite solid,there are also dimensions for defining location of individual shape elements,such as cutting pla

26、nes,in for defining location of individual shape elements,such as cutting planes,in addition to the above shape dimensions.As the intersection curve is uniquely addition to the above shape dimensions.As the intersection curve is uniquely defined with basic shape dimensions and location dimensions,th

27、ere is no need defined with basic shape dimensions and location dimensions,there is no need to dimension intersection curves.to dimension intersection curves.在标注截切体的尺寸时，除应标注上述定形在标注截切体的尺寸时，除应标注上述定形尺寸外，还应注出确定截平面位置的定位尺寸。由于截平面在形体上的相对位尺寸外，还应注出确定截平面位置的定位尺寸。由于截平面在形体上的相对位置确定后，截交线即被惟一确定，因此对截交线不应再标注尺寸。置确定后，截交

28、线即被惟一确定，因此对截交线不应再标注尺寸。请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容截交线处不注尺寸截交线处不注尺寸截交线处不注尺寸应注截平面定位尺寸应注截平面定位尺寸应注截平面定位尺寸应注截平面定位尺寸截交线处不注尺寸截交线处不注尺寸应注截平面定位尺寸应注截平面定位尺寸第5页/共23页 Dimensioning of basic body,cutting and Dimensioning of basic body,cutting and interpenetration bodiesinterpenetration bodies常见基本体、截切体及相贯常见基本体、截切体及相贯常

29、见基本体、截切体及相贯常见基本体、截切体及相贯体的尺寸注法体的尺寸注法体的尺寸注法体的尺寸注法3.Dimensioning of union/interpenetration type part 3.Dimensioning of union/interpenetration type part 相贯体的尺寸注法相贯体的尺寸注法 There are also location dimensions in addition to shape dimensions for There are also location dimensions in addition to shape dimensi

30、ons for union/interpenetration type parts.With shape and location dimensions,the union/interpenetration type parts.With shape and location dimensions,the interpenetration curves are uniquely defined,and there is no need either to interpenetration curves are uniquely defined,and there is no need eith

31、er to dimension interpenetration lines.dimension interpenetration lines.相贯体除了应注出两相贯基本体的定形尺寸外，还应注出确定两相贯基相贯体除了应注出两相贯基本体的定形尺寸外，还应注出确定两相贯基 本体相对位置的定位尺寸。当定形尺寸和定位尺寸注全后，两相贯基本体的相贯线即本体相对位置的定位尺寸。当定形尺寸和定位尺寸注全后，两相贯基本体的相贯线即被唯一确定，因此对相贯线不应再标注尺寸。被唯一确定，因此对相贯线不应再标注尺寸。请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容相贯线处不注尺寸相贯线处不注尺寸R相贯体的定位尺寸

32、相贯体的定位尺寸相贯体的定位尺寸相贯体的定位尺寸第6页/共23页Dimensioning of basic body,cutting and Dimensioning of basic body,cutting and interpenetration bodiesinterpenetration bodies常见基本体、截切体及相贯体常见基本体、截切体及相贯体常见基本体、截切体及相贯体常见基本体、截切体及相贯体的尺寸注法的尺寸注法的尺寸注法的尺寸注法4.Dimensioning of supporting board elements 4.Dimensioning of supporting

33、 board elements 常见平板的尺寸注法常见平板的尺寸注法 All center-to-center spacing of holes,screw threads and grooves on the All center-to-center spacing of holes,screw threads and grooves on the board should be dimensioned.Since the basic shape of the board and the board should be dimensioned.Since the basic shape of

34、 the board and the distribution of holes and grooves are different,the formats of location distribution of holes and grooves are different,the formats of location dimensions for dimensioning center-to-center spacing are also different.dimensions for dimensioning center-to-center spacing are also dif

35、ferent.在板上用作穿螺钉的孔、槽等的中心距都应注出，而且由于板的基本在板上用作穿螺钉的孔、槽等的中心距都应注出，而且由于板的基本 形状和孔、槽的分布形式不同，其中心距定位尺寸的标注形式也不一样。形状和孔、槽的分布形式不同，其中心距定位尺寸的标注形式也不一样。请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容第7页/共23页 Dimensioning general composite solidsDimensioning general composite solids 组合体的尺寸注法1.Selection of dimension datum Selection of dimens

36、ion datum 选定尺寸基准选定尺寸基准 There should be at least one dimension datum for each of the three principal directions for length,width and height of the composite solid.组合体在长、宽、高三个方向上至少都要有一个尺寸基准。组合体在长、宽、高三个方向上至少都要有一个尺寸基准。Length datum长度基准（X）Height datum高度基准（Z）Width datum宽度基准（Y）请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容（1）D

37、imension datumDimension datum 尺寸基准尺寸基准 Dimension datum indicates common starting position of related dimensions.尺寸基准是指尺寸的起始位置，是度量尺寸的起点。尺寸基准是指尺寸的起始位置，是度量尺寸的起点。第8页/共23页 1）Datum face 基准面基准面不便于量取。（2）Commonly datum of dimensioningCommonly datum of dimensioning 常用尺寸基准常用尺寸基准请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容 Dimen

38、sioning general composite solids Dimensioning general composite solids 组合体的尺寸注法Height datum：Symmetry plane or the bottom surface.Symmetry plane or the bottom surface.高度基准 上下对称面或底平面(Z=0)。Length datum：Symmetry plane or the end surface.Symmetry plane or the end surface.长度基准 左右对称面或左（右）端面；Width datum：Sym

39、metry plane or back-end surface.Symmetry plane or back-end surface.宽度基准 前后对称面或后端面(Y=0)第9页/共23页Coordinates origin坐标原点坐标原点曲面轮廓不能作为尺寸基准曲面轮廓不能作为尺寸基准曲面轮廓不能作为尺寸基准请点击鼠标左键显示后面内容请点击鼠标左键显示后面内容Center line对称中心线对称中心线3)Datum mark 基准点基准点Center point圆心圆心 Dimensioning general composite solids Dimensioning general co

40、mposite solids 组合体的尺寸注法Center axes回转轴线回转轴线 2)Datum line 基准线基准线 第10页/共23页留出开环，便于加工请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容Chain dimensioning串联式 a b c Combined dimensioning综合式 a b c（3）Form of commonly dimensioningForm of commonly dimensioning 常用尺寸标注形式Parallel dimensioning并联式 a b c Dimensioning general composite sol

41、ids Dimensioning general composite solids 组合体的尺寸注法Avoidance of dimensions into a series with an overall dimensions！注意：避免注成封闭尺寸链！注意：避免注成封闭尺寸链！Combined dimensioning is suitable 宜采用综合式注法宜采用综合式注法 第11页/共23页 Dimensioning general composite solids Dimensioning general composite solids 组合体的尺寸注法2.2.Correctnes

42、sCorrectness and integrity in dimensioningand integrity in dimensioning 标注尺寸要正确、完整标注尺寸要正确、完整(2)Location dimensions show the relative location relationships between individual shape elements.定位尺寸定位尺寸 表示各基本体之间相对位置尺寸。表示各基本体之间相对位置尺寸。(3)Overall dimensions show the overall length,width and height of the c

43、omposite solid.总体尺寸总体尺寸 表示组合体外形的总长、总宽、总高尺寸。表示组合体外形的总长、总宽、总高尺寸。(1)Shape dimensions show sizes,such as length,width and height,of the basic part and its building elements.定形尺寸定形尺寸 表示各基本体长、宽、高三个方向的大小尺寸。表示各基本体长、宽、高三个方向的大小尺寸。孔中心位孔中心位置尺寸应置尺寸应直接注出直接注出Center of holes Center of holes must be given must be gi

44、ven clearlyclearly孔中心距尺寸孔中心距尺寸应直接注出来应直接注出来Over-dimensionedOver-dimensioned注成封闭尺寸了注成封闭尺寸了Overall length Overall length added as an added as an auxiliaryauxiliary 必须注的多余必须注的多余尺寸应加括号尺寸应加括号注意：重要尺寸应直接注出注意：重要尺寸应直接注出(如总长、宽、高尺寸、孔的中心位置等如总长、宽、高尺寸、孔的中心位置等),),不应由其它尺寸计算求得。不应由其它尺寸计算求得。不能注成封闭尺寸链，应选择允许误差最大处作开环。不能注成

45、封闭尺寸链，应选择允许误差最大处作开环。请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容Overall length must Overall length must be given clearlybe given clearly总长尺寸应该直总长尺寸应该直接注出来接注出来第12页/共23页请请点点击击鼠鼠标标左左键键显显示示后后面面内内容容 Dimensioning general composite solids Dimensioning general composite solids 组合体的尺寸注法3.3.ClarityClarity and reasonableness in

46、 dimensioning and reasonableness in dimensioning 标注尺寸要清晰标注尺寸要清晰、合理合理(1)Dimensions should be marked in the view that most reflects the characteristics of the related shape and location.尺寸应尽可能标注在反映形体形状特征明显、位置特征清楚的视图上。尺寸应尽可能标注在反映形体形状特征明显、位置特征清楚的视图上。R引出轮廓线后再折平应注在有斜角应注在有斜角特征的图形上特征的图形上应注在有凸台应注在有凸台特征的图形上特征

47、的图形上不反映圆形特征且是虚线应注在有槽口特征处应注在有槽口特征处未反映圆未反映圆弧的特征弧的特征不可不可形成形成封闭封闭尺寸尺寸链！链！注注意意：将将斜斜角角、凸凸台台、圆圆形形、圆圆弧弧、槽槽等等结结构构的的尺尺寸寸注注在在反反映映其其特特征征的的图图形形上上,圆圆弧弧应注应注R R,整圆应注整圆应注,球应注球应注 S S,半球应注半球应注 R R。圆弧应注圆弧应注其半径其半径 R R整圆应注整圆应注其直径其直径 第13页/共23页对称结构不可只注一边对称结构不可只注一边,这会使另一边在加这会使另一边在加工后将有较大误差而形成不对称件。工后将有较大误差而形成不对称件。请请点点击击鼠鼠标标左

48、左键键显显示示后后面面内内容容注意注意:对称结构应将对称中心线两边结构合起来注对称结构应将对称中心线两边结构合起来注,不可只注一边或分两边注不可只注一边或分两边注 （不合理，易因标注错误制造出不对称件）。（不合理，易因标注错误制造出不对称件）。(2)Dimensions should be marked in the view that most reflects the characteristics of the related shape and location.Dimensions should not be marked on dashed lines as far as poss

49、ible.同一基本体的定位、定形尺寸应尽可能集中标注在同一视图同一基本体的定位、定形尺寸应尽可能集中标注在同一视图 上，上，尽量尽量避免在虚线处注尺寸避免在虚线处注尺寸。避免在避免在虚线处虚线处注尺寸注尺寸对称结构对称结构,尺寸应尺寸应合起来注出合起来注出前后对称前后对称,尺寸应尺寸应合起来注出合起来注出尽量集中标注尽量集中标注在同一视图上在同一视图上2 2 Dimensioning general composite solids Dimensioning general composite solids 组合体的尺寸注法第14页/共23页1610484040 848请点击鼠标左键显示后面内

50、容请点击鼠标左键显示后面内容NoticeNotice 注意注意:1.1.有多个相同的圆形有多个相同的圆形(或圆弧或圆弧)规律分布时，应将尺寸注在反映圆形规律分布时，应将尺寸注在反映圆形(或圆或圆 弧弧)的视图上的视图上,只注其中一个即可只注其中一个即可,圆形应注明数目，圆弧则不注数目圆形应注明数目，圆弧则不注数目;2.2.零件上的角度尺寸线为弧线零件上的角度尺寸线为弧线,角度数值一律正写。角度数值一律正写。101660R8 Dimensioning general composite solids Dimensioning general composite solids 组合体的尺寸注法15