The Frame
# T8 M6 P4 V- a4 J! A, gCreate a new part.创建一个新零件
5 i/ l5 z( w0 b1 M3 gUsing the drawing provided on illustration EX1-B, build the Frame. 使用所提供的工程图建模
4 L$ E/ p$ \( r" {! E. c# W1 u/ iExhibit your ability to create extruded, swept or lofted features.3 p' K* b. E" P1 N O. o
使用拉伸、扫描或放样 4 p0 N R8 |* n
Use mirroring to create symmetry使用镜像创建对称物体
0 x6 D1 n% d* _! T7 ~Save the part in your folder as: “Frame”保存文件为Frame4 T, c5 H$ g3 }. h/ V9 }1 B; L6 ~
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Design Intent设计意图:# L. j; d* {+ H3 t7 ~ A& k
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The part is symmetric from left to right零件从左到右对称
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# F D6 Z# U9 l( M( IThe part origin is located concentric with the lower bosses零件原点与最下端圆孔同心1 K! q. g" | G$ ]# c0 w. h
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The 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' ]# Z- Q' p8 o. g4 l: R
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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
4 g! N4 s- f. F7 oCAUTION:6 k% ]! z/ X/ Y) n) i
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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The 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: A: Q v7 Q# g9 G8 p0 Y0 U. z
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* N1 M6 v. \ V) sThe Upper Boss must work for the value range:/ c1 E" ?; @% G" r$ x2 j8 w( s. T0 |
.95 to 1.875 in.顶部圆柱外径可以从0.95到1.875英寸* H% X( k* N) V- g$ `) c
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( `, r! s9 u! BThe 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4 j0 n: w5 `$ s# ~7 ]
Scoring Criteria:. r. K, y$ j, f+ M
The Frame评分规则
1 z# w7 W. a7 W; ^) _4 ATotal Value:
: @6 g) p7 Y6 s8 b0 b5 E80 Points总分：80分
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7 G4 R$ K( V" b8 x! IWere the bosses created as extruded features?
3 O6 E: p2 E! B圆柱孔是否是拉伸特征？(5分)
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/ R2 \# L. d) `5 Q6 x1 s; f7 AChange the center-to-center height from 5.5 to 7.5.
' @; T6 }2 a( G0 @) |Does 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）6 I1 j z& v; Z$ E/ r" o
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Was 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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5 V; |8 E e: y! Y: i* V0 }7 A9 XChange 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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- v9 B' U! f! }) S7 ?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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Does 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）
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]( v# _3 e5 m( o2 B+ D" X7 W/ ~8 TIs the Vertical Member tangent to the Upper and Lower Bosses?4 g5 ^* d) X1 e, K7 N% t! l
顶部和底部圆柱孔是否和垂直部分保持相切？（10分）& s7 n# M5 [4 x, ~6 H2 V& X
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Inspect 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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/ g$ i* [! m, w) wInspect 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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# |! q3 r, [" P9 }8 @Is the keyway in only one of the Upper Holes?3 }+ N, t4 O. I P
是否顶部圆柱孔只有一个键槽？（5分）/ j2 h5 |7 s; ~6 x
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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。% {) r# \6 O' b
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: ?& E( b) s" t7 Z4 UChange the width of the keyway.
9 ?' H. S! q# O$ \# c6 |5 Q: HIs 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