2 n4 s" v) q% s. |3 ]其實(shí)人家圖紙根本沒有錯(cuò)，你想歪了。 # S6 h& ^5 l! S; o" i$ X1、從這個(gè)視圖看過去那根線就是表示的那個(gè)表面，注意（默認(rèn)的basic dimension 90°）。并沒有你所表述的、歪成那樣的位置下（basic dimension 不為90°）再評價(jià)垂直度。我覺得你把這個(gè)垂直度理解為平面度了。 8 W! ?, K7 T8 c) _: ]. D! N附上一些尺寸的基本原則： t3 F) b2 T- O! l, za) Each dimension shall have a tolerance, except for those dimensions specifically identified as" ]' W# i' L" s: N" `! G reference, maximum, minimum, or stock (commercial stock size). The tolerance may be applied directly 3 w m9 S; [1 hto the dimension (or indirectly in the case of basic dimensions), indicated by a general note, or located in& B) H# ~; D8 Q e& O a supplementary block of the drawing format. See ANSI Y14.1.5 k8 u/ p" y8 T6 z, |* Q (b) Dimensioning and tolerancing shall be complete so there is full understanding of the characteristics of each feature. Neither scaling (measuring the size of a feature directly from an engineering % [! G4 ~$ R& p @ S1 Vdrawing) nor assumption of a distance or size is permitted, except as follows: Undimensioned drawings,8 ?1 L w2 I% b$ v1 D( d$ I such as loft, printed wiring, templates, and master layouts prepared on stable material, are excluded. |* G( h( Y0 _7 Y- x! n provided the necessary control dimensions are specified.$ I5 b6 C' k9 P" e6 n (c) Each necessary dimension of an end product shall be shown. No more dimensions than those+ j) l) r; j4 z" ~" i! J! ] necessary for complete definition shall be given. The use of reference dimensions on a drawing should$ h: l; Z5 m, ?% T# u. }# ^& h be minimized.$ P& Y9 {( R* B# X8 D (d) Dimensions shall be selected and arranged to suit the function and mating relationship of a part6 b7 u! _0 |) K; G4 k) o7 e ? and shall not be subject to more than one interpretation. - Z. m& H# N X. m(e) The drawing should define a part without specifying manufacturing methods. Thus, only the , J$ y9 G4 [! e4 q5 q- O5 l1 f" Qdiameter of a hole is given without indicating whether it is to be drilled, reamed, punched, or made by any ! O% w6 _6 {+ {3 L1 u& M4 c- ^other operation. However, in those instances where manufacturing, processing, quality assurance, or B. y# v, T2 u) Nenvironmental information is essential to the definition of engineering requirements, it shall be specified on the drawing or in a document referenced on the drawing. 4 u- _$ R6 S! }$ p. \8 d(f) It is permissible to identify as nonmandatory certain processing dimensions that provide for ( Q d' a3 r) H- `6 m4 |( ^; [finish allowance, shrink allowance, and other requirements, provided the final dimensions are given on 9 F- |, E2 R, B$ @% |* E, rthe drawing. Nonmandatory processing dimensions shall be identified by an appropriate note, such as3 V: ^4 E2 m8 E6 |, O NONMANDATORY (MFG DATA).) Z& y! J1 S( z# j* z" s (g) Dimensions should be arranged to provide required information for optimum readability. Dimensions should be shown in true profile views and refer to visible outlines. - ?1 p- S* \6 A; s(h) Wires, cables, sheets, rods, and other materials manufactured to gage or code numbers shall be % _! Z. X5 d( ^- vspecified by linear dimensions indicating the diameter or thickness. Gage or code numbers may be # n+ S: d; D% x/ a: Dshown in parentheses following the dimension.4 o" z7 d/ x6 M! t9 v+ l* O' [ (i) A 90° angle applies where center lines and lines depicting features are shown on a drawing at5 l; K) H& G, T) R$ j% a/ O right angles and no angle is specified.+ O) k! d# v. Z1 n6 @ (j) A 90° basic angle applies where center lines of features in a pattern or surfaces shown at right% [ w+ J% M/ Y& `* D- Z" v) ? angles on the drawing are located or defined by basic dimensions and no angle is specified. ( z: }9 {$ F! i/ @1 v- v(k) Unless otherwise specified, all dimensions are applicable at 20°C (68°F). Compensation may be " o$ m! v7 V1 x* l. B1 z' e+ Wmade for measurements made at other temperatures. ' s' c6 r9 w8 B$ t+ A(l) All dimensions and tolerances apply in a free state condition. This principle does not apply to% J: Z! h0 `7 W: \8 f0 f# k nonrigid parts as defined in section 5.5. / m: @& N2 T# r(m) Unless otherwise specified, all geometric tolerances apply for full depth, length, and width of the ( {6 l) _ a7 v ~feature. * v6 [ q" \' O4 k) l(n) Dimensions and tolerances apply only at the drawing level where they are specified. A dimension3 ]! j# s0 `& o' _) F9 [; \ specified for a given feature on one level of drawing, (for example, a detail drawing) is not mandatory for1 S9 ~! e) g3 W, ~& |9 G that feature at any other level (for example, an assembly drawing) ; f% j+ L* ^; a( A) D" V! g一下是其中一個(gè)中文PPT中的，中文的僅供參考，翻譯不全感覺，也感覺不是很貼切愿意。9 _ n1 G' l; e6 x. U' k2 H
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1 r5 j, m0 l9 O, w, N1 y: q5 ~ , v5 P6 h7 g5 B- [& K8 r3 B) H8 o6 f# G) U B$ ^ 作者: solomoon 時(shí)間: 2015-2-10 23:07
樓主大俠，要說一個(gè)圖紙有沒有問題先看是不是滿足功能，功能不清楚的情況下不好說是否不合理。 7 R8 V2 Z- R6 h3 l" @8 e+ N( j, R9 Y O I9 r
從原圖上看，兩個(gè)端面是允許傾斜的，符合自由的形位公差就可以了， % J6 `, V" ^/ Z4 _6 m( d7 p, A3 k) u2 i8 ^( y9 u
但是標(biāo)注垂直度的兩端面，平面度必然在0.02的范圍內(nèi)，要不然就超差了，無法保證垂直度的要求。 8 _1 l& i+ h1 b7 J |% p * H$ s" s" r. @4 v2 p圖紙?jiān)诓幻靼坠δ軙r(shí)，不能說有問題作者: zerowing 時(shí)間: 2015-2-10 23:20
seekfor 發(fā)表于 2015-2-10 19:40 & A# c; k0 L0 [1 h& @0 S) ?* d
其實(shí)人家圖紙根本沒有錯(cuò)，你想歪了。 8 m2 y) R: f: L T+ W1、從這個(gè)視圖看過去那根線就是表示的那個(gè)表面，注意（默認(rèn)的basic d ...
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補(bǔ)充一點(diǎn)吧2 [% ~1 i, Q2 z7 v q3 S
ISO 默認(rèn)獨(dú)立原則，你非要這么理解也有道理，但是歪只能歪在默認(rèn)角度90°的自由公差內(nèi)；垂直度平面度依然0.02；平行度就不說了，畫畫公差帶，反正好不到哪去，理解類似于一圓柱只標(biāo)直徑和直線度(標(biāo)在表面)；ISO標(biāo)準(zhǔn)下是直徑和直線度單獨(dú)檢測； ! Z! \! b. k; |9 D5 H: I美標(biāo)默認(rèn)包容原則，就像我上面說的，在自由尺寸公差的公差帶內(nèi)占據(jù)0.02的范圍；依舊可以參考一圓柱只標(biāo)直徑和直線度(標(biāo)在表面)美標(biāo)下的檢驗(yàn)和ISO下不一樣。: B$ ?* w7 w& Q3 L) V
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