The Frame 9 z2 _: L" w; Z7 F T. ]7 R
Create a new part.创建一个新零件 4 E& _/ ^# g0 ~/ f0 A: O
Using the drawing provided on illustration EX1-B, build the Frame. 使用所提供的工程图建模 ! l, F0 C1 q, H2 w) O% \& b" ~
Exhibit your ability to create extruded, swept or lofted features.
8 {- _- {& j. @/ H" p W% r+ H使用拉伸、扫描或放样
$ }5 m, x) k; N. \7 I9 W) E9 RUse mirroring to create symmetry使用镜像创建对称物体
1 ^2 Y# H/ N& X2 k. GSave the part in your folder as: “Frame”保存文件为Frame3 i* E9 ?& p7 F) K7 F, z
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Design Intent设计意图:
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+ d% p* |! |) `The part is symmetric from left to right零件从左到右对称& y D# s' V' u/ y- V
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The part origin is located concentric with the lower bosses零件原点与最下端圆孔同心 w& u% K: H" u3 n8 F; T8 k0 ^
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" }& v8 ?: T" i8 P) z8 sThe interior machined surfaces labeled A and B are coplanar内机械加工表面标记为AB的面为同一个平面
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The vertical member is elliptical and always tangent to both the upper and the lower bosses. 垂直部分是椭圆形的，并且总是和上下两个圆柱孔外表面相切1 ]8 m7 K* l+ w4 P) M' k
CAUTION:* v1 r- P( c" f% I \6 M
Tangency between cylinders occurs at the center plane of the cylinders only if the cylinders are of equal diameter.仅当两个圆柱孔直径相等时，相切发生在圆柱中心平面
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( }9 h8 Q Q0 c! X4 z6 I! A! eThe top and bottom radii of the I-shaped cross member are always tangent to the outside edge of the vertical member. I形的顶部和底部总是和垂直部分的外边线相切
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The Upper Boss must work for the value range:; Q4 A3 l5 W7 ~, P
.95 to 1.875 in.顶部圆柱外径可以从0.95到1.875英寸
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The Lower Boss must work for the value range: 1.25 to 2.25 in.底部圆柱外径可以从1.25到2.25英寸
% f* t- q/ S7 ^" g( s+ kScoring Criteria:- s* n" ~- O- \7 V% D
The Frame评分规则9 ^9 t( u7 L) S8 l/ r* w( I
Total Value:
Z% G% }/ @; d% n$ [2 u80 Points总分：80分
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! p. b- C5 s# Y8 X; j4 QWere the bosses created as extruded features?; D1 ]. r1 A- S# {( m
圆柱孔是否是拉伸特征？(5分)& B1 l6 F7 f( k: Q2 u+ k3 C
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Change the center-to-center height from 5.5 to 7.5.
' g5 x! B4 n, cDoes the part rebuild correctly?将两个圆柱孔中心距离从5.5改到7.5是否有重建错误？（10分）
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0 ?3 s. [0 b+ a iWas the Vertical Member created using a loft or a sweep?垂直部分是否用放样或扫描完成？（10分）
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6 w, E% {0 Q0 `7 Z) \- e" u) hChange the lower boss diameter to 2.25 and the upper boss diameter to .95.将底部圆柱孔直径改为2.25和顶部圆柱孔直径改为0.95
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Does the part rebuild without errors and has Design Intent been maintained?零件重建是否有错误并同时保持设计要求？（10分）
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# m4 ~# K0 A8 O7 J, b3 ~+ gDoes the Cross Member remain tangent to the Vertical Member?水平交叉部分是否和垂直部分保持相切？（10分）3 J/ A" }5 h8 q% S7 D" j: C
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, r% Y6 _& N0 R" vIs the Vertical Member tangent to the Upper and Lower Bosses?
7 u y) g+ C' g- m" X, { j/ h顶部和底部圆柱孔是否和垂直部分保持相切？（10分）
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1 Q) }" J9 `: ]# F0 xInspect the Upper Hole diameters to verify that they are represented accurately.检查上圆柱孔直径是否精确表达？（5分）
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Inspect the Lower Hole diameters to verify that both are .625 in diameter.检查下圆柱孔直径都是0.625英寸的情况（5分）
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Is the keyway in only one of the Upper Holes?: T/ }* _8 @/ S; C
是否顶部圆柱孔只有一个键槽？（5分）
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Was the keyway created using a min arc condition dimension of .0.63?
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键槽的生成是用了0.63最小圆狐的尺寸条件。
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3 S6 y: c1 M# R& TChange the width of the keyway.
& H; Z0 E) o1 B1 j) S* Q+ ~Is the feature symmetrical and has design intent been maintained?改变键槽宽度，特征是否对称，设计要求是否保持？（10分） |
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狗仔卡
发表于 2008-2-19 14:21
显身卡