本帖最后由 扫街 于 2010-1-29 15:36 编辑
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1 w' ?- p; V' a& {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。
( R$ S; B0 Z% B( Q6 W9 z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。$ n0 \/ W. y2 [- a
EBF3,电子束无模成形系统见图dd
9 W0 r9 `- ?. A( K5 G2 R& D: MEBF3制造出的样件见图ee
( v& L2 h4 _% g+ c7 _5 e% }# c) pEBF3真空室见图ff
1 J5 o1 {( ~' a5 h9 }EBF3控制面板见图gg1 a9 O0 x3 j, T0 b. Q
EBF3 主要技术参数 ) y& b% N4 u: f1 u. m
Current build volume:6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24
! S( L* S; k3 u1 l7 Vcm)
8 d- A, Z# X( F) k9 w) F { Maximum build size: 6 in. x 6 in. x 6 in. (15.24 cm x 15.24 cm x 15.24 cm)
( x$ C% L+ ]7 d& s, G Layer thickness: 0.02 in. – 0.05 in. (0.5 mm – 1.27 mm)! v5 u) f, Y7 S; v: O. c/ w$ U/ U
E-beam scan speed:Not applicable
1 W+ x+ M9 u9 H! s5 i) D8 Y Deposition rate:5 cubic in. per hour (80 cubic cm per hour)0 T% b1 l8 e0 _% ^1 S6 j9 Y# W* V
E-beam positioning accuracy:±0.005 in. (±0.127 mm)
& a: E0 N' p6 s0 U Part accuracy:±0.1 in. (±2.54 mm) has been demonstrated, and experience & a/ x9 o" {& b# x; Q
suggests that accuracy of ±0.05 in. (±1.27 mm) could eventually be
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/ i1 c2 a+ a# f* [4 e/ I Calibration:Automatic
: I1 x( e* X- v: L+ `6 M Cooling:Automatic
. l; ]+ G3 v. E3 v/ l Power supply:Max: 30 kV, 100 mA, 3 kW
; o( T: M/ q' X' t5 C- b6 ] Size:Standard 19-in. (48.26-cm) rack-mounted controls
2 z$ X6 l8 q5 l O( f9 X8 E& G5 ` Chamber option 1: 32 in. W x 42 in. H x 32 in. D
; f1 a( l; U' ?( A9 M, B (107 cm W x 107 cm H x 81 cm D)
$ \: R9 D `% O4 `+ i Chamber option 2: 24 in. diameter x 24 in. high! Y8 n# k+ l- `" E
(61 cm x 61 cm)
- L, y6 T5 X2 D6 M Total system weight: 350 lbs. (160 kg)
$ x( ~ N4 O7 j: P9 n; Q Process computer:PC, XP, LabVIEW Interface/ Z3 B. y: P I4 G& A2 q
CAD interface:Standard: STL or other engineering CAD/CAM (ProE, CATIA,
3 S) ]5 w1 K/ a1 b FeatureCAM, MasterCAM)+ U" O" o$ [% H$ r$ r0 Q# F% z
Network:Ethernet: 10/100
2 c0 @3 C- C: J! X+ ^& x; I Certification:NASA’s partners are seeking aerospace certification |