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本帖最后由 掃街 于 2010-1-29 15:36 編輯 : o) ~8 u! ]: ]. z, j+ A; u
0 S. l8 ~* n. Z; G iFabrication(EBF3),電子束無模成形制造技術。是目前最為先進的直接制造技術(Direct Manufacturing),它可以從計算機3D模型直接成型出機械零件。與現有的快速成型技術(RP,rapid prototyping)不同的是,EBF3技術可以直接成型鈦(titanium)、鎳( nickel)、不銹鋼(stainless steel)和其它有較高熔點的合金(refractory alloys)零件。EBF3將改變傳統的金屬加工制造模式,隨著這一技術的進一步成熟,EBF3將首先應用于航空制造業、軍工制造業和汽車制造業,大大縮短零件制造周期,減少原材料浪費,降低成本;并且有利于太空零件加工和空間設備維修。 0 e& S% k+ t6 h' M5 U0 o
美國宇航局蘭利研究中心(NASA Langley Research Center)日前對外演示了這項新技術。據了解,NASA已經獲得了這項目技術的發明專利(#7,168,935),其它相關專利正在申請中,美國Sciaky Inc等公司為EBF3技術的合同商。
D1 S& V" ]) J/ d- S( [EBF3,電子束無模成形系統見圖dd
6 _- \' G! f, `$ r1 p6 Q& xEBF3制造出的樣件見圖ee s3 @& z3 `" \0 G1 T
EBF3真空室見圖ff1 x2 E, C3 Q# ~5 W( G
EBF3控制面板見圖gg5 S7 M) t) Q% @6 j0 z9 r5 G
EBF3 主要技術參數
- f' ~$ Y3 @! ?/ c* [ Current build volume:6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24 # }# }7 H3 H1 @# V4 F' i
cm)
. @* `" w5 A6 r+ P7 O6 Q% v Maximum build size: 6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24 cm)
2 O7 \$ Y4 T- l5 U" T Layer thickness: 0.02 in. – 0.05 in. (0.5 mm – 1.27 mm)
6 b# A( p& [* E5 b4 x4 e5 z; ]0 s% z E-beam scan speed:Not applicable0 K$ A; P8 v8 y7 u
Deposition rate:5 cubic in. per hour (80 cubic cm per hour)# F! N% S4 \/ p: p
E-beam positioning accuracy:±0.005 in. (±0.127 mm)
0 d8 Z' [; J# o! a" e& h Part accuracy:±0.1 in. (±2.54 mm) has been demonstrated, and experience : a3 M+ X. X$ `# g
suggests that accuracy of ±0.05 in. (±1.27 mm) could eventually be
1 \6 Y" H% [5 i9 x1 [' O achieved
2 u' F/ A0 t- L$ I Calibration:Automatic5 B# W$ Z' q8 E( n! Y
Cooling:Automatic
' W8 ]" z4 e$ D l) r4 [, a6 C Power supply:Max: 30 kV, 100 mA, 3 kW3 B T8 y9 B |
Size:Standard 19-in. (48.26-cm) rack-mounted controls
/ y+ n/ M3 [3 \ Chamber option 1: 32 in. W x 42 in. H x 32 in. D
1 O0 S2 ^9 ]' j$ I' @" u9 t (107 cm W x 107 cm H x 81 cm D)
# A9 ]3 Q: a" G+ L, z Chamber option 2: 24 in. diameter x 24 in. high
7 h; \1 I, f1 t8 [7 Y9 E6 T (61 cm x 61 cm)5 R3 @! [1 F) m7 C$ ?1 H( i
Total system weight: 350 lbs. (160 kg)
6 d1 A; z/ H' a; r; \ Process computer:PC, XP, LabVIEW Interface& W$ t3 W* ]8 n- j6 B7 W
CAD interface:Standard: STL or other engineering CAD/CAM (ProE, CATIA, " E+ _5 F; \) a7 L& U
FeatureCAM, MasterCAM)
& N% m7 |) P+ g Network:Ethernet: 10/100* }9 D% q9 Y( o0 G
Certification:NASA’s partners are seeking aerospace certification |
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