Request For Quote- RFQ - two-part support

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dantm

New Member
Hi,

Thank you to everybody who responded to my last RFQ.

Currently, one of my students has designed a support for a small antenna project; it consists of 2 parts which should be relatively simple except for one feature on each part:

Part "outer" is the bigger (blue) box is approx. 3 x 5" and has a narrow, internal channel which is required by design to have 'square' corners -- i.e. as tight radius as possible. The dimensions of this channel are 0.148 x 0.074".

Part "inner" is the smaller (yellow) piece, fits inside, and is fastened to the "outer" piece. This has a feature of a 'rectangular' cut-out that is required to be with as square corners as possible. The dimensions of that cutout are also 0.148 x 0.074".

Do you guys suggest any techniques that can allow these to be made? Is anybody here interested in this project?

Many thanks and best regards,



/Dan
 

dantm

New Member
groundplanepage1.jpg

groundplanepage2.jpg

groundplanepage3.jpg
 

dantm

New Member
Thanks to all who replied; you will receive my e-mails shortly.

I think we can live with very tight radii around the corners in those channels, something preferably < 10 mil if possible (somebody PM-ed me mentioning that 13 mil radius would be feasible but I wonder if it's possible to have 10 mil or less?).

I'm going to attach views of the corners that are required to be as sharp as possible.

Thanks a lot,




/Dan
 

dantm

New Member
Inner part:
partinnerdetail.jpg


Outer part:
partouterdetail.jpg


The green arrows illustrate the corners that need minimal radii...

Note that the two parts are not to scale with respect to each other.

Thanks!



/Dan
 

dantm

New Member
Just to illustrate to you guys that I'm not 'crazy' with this job :), here's a view of the electromagnetic fields as they channel through the L-shaped channel (which is composed of the thin slot in the 'outer' part and the rectangular cut-out in the 'inner' part).

When we model these we always use ideal mechanical case which is 'square' corners.

completewaveguidetomicr.gif
 

dantm

New Member
Found two images of a previous similar design, can you guys tell if these were EDM? Looks to me like they have rounded corners but I can't estimate how much they are. For reference the channel width is 0.148" and the height is 0.074".


reverseeng01.jpg

reverseeng02.jpg
 

grichardson

New Member
You know, one could easily cut those corners square by locking the spindle and using a "keyway" cutter . which is basically a straight and square cutter. Then you just shear the corners in by drawing the spindle down. Since its aluminum it would be very easy. I would quote but my specialty is production turning so I would probably over charge for the piece.
 

DareBee

New Member
That is fine for the through piece but won't work on the blind piece. Just mush the material into the bottom
 
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