本帖最后由 扫街 于 2010-1-29 15:36 编辑 0 x$ Q: y% H1 X
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Fabrication(EBF3),电子束无模成形制造技术。是目前最为先进的直接制造技术(Direct Manufacturing),它可以从计算机3D模型直接成型出机械零件。与现有的快速成型技术(RP,rapid prototyping)不同的是,EBF3技术可以直接成型钛(titanium)、镍( nickel)、不锈钢(stainless steel)和其它有较高熔点的合金(refractory alloys)零件。EBF3将改变传统的金属加工制造模式,随着这一技术的进一步成熟,EBF3将首先应用于航空制造业、军工制造业和汽车制造业,大大缩短零件制造周期,减少原材料浪费,降低成本;并且有利于太空零件加工和空间设备维修。 9 Z' l" a2 c/ n1 B
美国宇航局兰利研究中心(NASA Langley Research Center)日前对外演示了这项新技术。据了解,NASA已经获得了这项目技术的发明专利(#7,168,935),其它相关专利正在申请中,美国Sciaky Inc等公司为EBF3技术的合同商。/ V3 c. { e- _: [% G' M$ H
EBF3,电子束无模成形系统见图dd3 c. r+ V, h7 ^: E; Z( o
EBF3制造出的样件见图ee" J2 E/ ?2 v9 P6 I+ k4 _$ n# q
EBF3真空室见图ff
6 A5 g+ s/ {" [' V) U! a5 {4 X$ cEBF3控制面板见图gg2 k& A, r/ x& ?- I% z# J8 I' d
EBF3 主要技术参数 & ?6 M3 ]$ j+ F8 s L1 ~* x
Current build volume:6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24
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- g5 r$ ]7 E7 V ~ Maximum build size: 6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24 cm)
$ B0 _$ s7 w- I- G+ |+ E+ ^) K Layer thickness: 0.02 in. – 0.05 in. (0.5 mm – 1.27 mm)% q- H8 z J6 c" e4 H
E-beam scan speed:Not applicable
9 I( t+ p* c8 Y9 k Deposition rate:5 cubic in. per hour (80 cubic cm per hour)
$ q8 G( S$ I0 K) R E-beam positioning accuracy:±0.005 in. (±0.127 mm)
: D' q7 Q, j* Z8 m5 O6 K Part accuracy:±0.1 in. (±2.54 mm) has been demonstrated, and experience 2 o, V5 r5 ?& L0 i8 ]% [- k& b
suggests that accuracy of ±0.05 in. (±1.27 mm) could eventually be 6 N5 r/ u' m1 H/ C0 s, ^ W
achieved4 c( ~0 |6 y0 @: O
Calibration:Automatic! @% C; L. P) V, f g& w) W
Cooling:Automatic# M* S u3 {' b
Power supply:Max: 30 kV, 100 mA, 3 kW2 G6 z. s( M2 v' j8 L8 `( U
Size:Standard 19-in. (48.26-cm) rack-mounted controls8 O' L) p0 S* J% K/ s' @; P
Chamber option 1: 32 in. W x 42 in. H x 32 in. D
5 A* p! A- t# t. k1 W. [3 y2 t8 W (107 cm W x 107 cm H x 81 cm D)
* D& ^7 X2 b$ ~( n6 D Chamber option 2: 24 in. diameter x 24 in. high- |2 O6 h9 }' o! J. B* x
(61 cm x 61 cm)
1 a/ [, b+ h' H( x! G+ ] Total system weight: 350 lbs. (160 kg)2 `/ k2 C F% J4 T' n
Process computer:PC, XP, LabVIEW Interface" W; |6 E3 v" p* g
CAD interface:Standard: STL or other engineering CAD/CAM (ProE, CATIA,
! R& ]) Y/ r; Y5 L$ L FeatureCAM, MasterCAM)) Z0 y5 v: R2 C, w
Network:Ethernet: 10/100
4 k$ [5 u1 l! F1 v, s0 N; \ Certification:NASA’s partners are seeking aerospace certification |