The Frame
( K; L$ i$ }4 {% k) ]& ]Create a new part.创建一个新零件
8 ]1 l0 ?9 u; ZUsing the drawing provided on illustration EX1-B, build the Frame. 使用所提供的工程图建模 0 `2 E5 x7 p: N, X6 t$ d
Exhibit your ability to create extruded, swept or lofted features.# b: |* d- R' p" h
使用拉伸、扫描或放样
! l; U @; F. P' V" Z$ ]Use mirroring to create symmetry使用镜像创建对称物体
9 R, Q2 [; ?: ^3 g* {+ y8 ~) L3 a2 ZSave the part in your folder as: “Frame”保存文件为Frame! [1 M5 `6 p+ j! J/ r
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Design Intent设计意图:% o- Z: w G/ [ {& X# H9 N$ [
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- R! w; t8 h. e7 w, A- a' ^' \% l6 [The part is symmetric from left to right零件从左到右对称
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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
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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1 s" n4 |2 w! f0 t) @: V" ?7 ?. _
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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
( Z- g$ d% M9 _- d* qCAUTION:$ _. t4 e" W1 _; b
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" i" [, f/ Y7 J `8 {6 t7 [
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/ _" [7 x( _8 ~+ }3 PThe 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$ y# N0 ^1 Z; a$ C- g
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The Upper Boss must work for the value range:, K4 \* _% Y. M7 ~1 S- K5 U' c
.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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7 Z \6 T1 B; t0 b- B* AThe 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 P( d$ X5 [* E' ]0 UScoring Criteria:/ R' d7 C$ D* o! |$ z
The Frame评分规则" k( c: q h7 S4 e" s6 d
Total Value:
; T0 u8 q$ Y# x9 W1 w80 Points总分：80分
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2 b0 `' p& K' k: `; PWere the bosses created as extruded features?1 D5 }- G: k# i1 _" e7 o
圆柱孔是否是拉伸特征？(5分) R, O8 r4 j3 t
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Change the center-to-center height from 5.5 to 7.5.
7 f: f* s! p& I5 T8 dDoes 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）' w8 }& K0 [4 F
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: I, B6 v" v" p& x! GWas 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 K: n6 t8 T( K( b- fChange 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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/ k& x4 B& p0 F _$ `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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! S1 W4 ~0 h- q$ Z( \Is the Vertical Member tangent to the Upper and Lower Bosses?* X7 X# Y* F+ w5 y' u5 {
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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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）% N( _ B, Y) D" k
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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）2 i' `% o2 D7 V$ ^7 \7 |
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5 Y* c" e( P+ m& ?6 Y5 JIs the keyway in only one of the Upper Holes?
' u+ @- F; r! f6 `9 Y. ]是否顶部圆柱孔只有一个键槽？（5分）
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. [) l; J1 |' @/ c2 D! |. v7 A4 mWas 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。1 X0 Y' l O) m0 Y0 R( G
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( u* V, t b) W2 [Change the width of the keyway.
7 |5 A+ X O/ N, x# v" @+ N( xIs 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