Upload
maddison-jakes
View
221
Download
4
Tags:
Embed Size (px)
Citation preview
H. Dinwiddie EVLA Feed CDR2/17/05
1
Fabrication and Mass Production Plans for Laminated Feeds
L-Band
S-Band
H. Dinwiddie EVLA Feed CDR2/17/05
2
Lamination vs Machining
• To Laminate or Not to Laminate, that is the question
• Cost effectiveness for large feeds
• Weight Reduction
• Proven effective with VLBA L-Band
H. Dinwiddie EVLA Feed CDR2/17/05
3
Laminated Feed Assembly Overview
• Cut the rings and bands• Assemble the rings and bands on a
Christmas Tree• Laminate the assembly• Apply surface finish to the inside of the
feed after lamination
H. Dinwiddie EVLA Feed CDR2/17/05
4
Rings
• Made of 6061T6 Aluminum Sheet
• Cut at the VLA site by a custom build ring machine
• Grooved on the edges to accept the bands
H. Dinwiddie EVLA Feed CDR2/17/05
5
Bands
• Bands are made of 5053H34 Aluminum Strap
• Cut to length and welded at the VLA site
H. Dinwiddie EVLA Feed CDR2/17/05
6
Rings and Bands Interface
H. Dinwiddie EVLA Feed CDR2/17/05
7
Christmas Tree
• Feed assembly jig• Centers rings and bands• Applies pressure during
lamination• Rotates during the
laminating process
H. Dinwiddie EVLA Feed CDR2/17/05
8
The Christmas Tree
H. Dinwiddie EVLA Feed CDR2/17/05
9
Christmas Tree
H. Dinwiddie EVLA Feed CDR2/17/05
10
Laminated Horns
H. Dinwiddie EVLA Feed CDR2/17/05
11
Before and After
H. Dinwiddie EVLA Feed CDR2/17/05
12
Laminated Feeds to Date
• VLBA L-Band Feeds
• GBT - 2 Laminated Feeds (S and L Band)
• EVLA - 2 L-Band Feeds
• EVLA - 2 C-Bands Feeds
• Currently Laminating 3rd L-Band
H. Dinwiddie EVLA Feed CDR2/17/05
13
The Lamination Experience
• C-Band has a break even point between lamination vs machining from c-cast material
• L-Band feeds are easier to handle when laminated in two pieces
• Developed good techniques and tools
H. Dinwiddie EVLA Feed CDR2/17/05
14
Questions?