View Single Post
  #2   Spotlight this post!  
Unread 30-12-2011, 02:56
Cory's Avatar
Cory Cory is offline
Registered User
AKA: Cory McBride
FRC #0254 (The Cheesy Poofs)
Team Role: Engineer
 
Join Date: May 2002
Rookie Year: 2001
Location: Redwood City, CA
Posts: 6,806
Cory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond repute
Send a message via AIM to Cory
Re: paper: 3008 Custom AM Super Shifter Plates Pocketed

Quote:
Originally Posted by GRT808 View Post
Yes we have gotten it waterjetted thanks.

As for it bending we are using aircraft grade aluminum (not sure what alloy) but in our past competitions we have used the same grade and have never seen it break in any of our applications. I'm a bit more concerned about the effort it is going to take to make everything fit (such as the bearings) since the jet is so precise.

We are using 0.187" aluminum plate.

Any suggestions or concerns I should be aware about before season starts?

I think aircraft grade aluminum is a waste of money.

If you properly support that plate you will see zero benefit from using any alloy stronger than 6061.

You may actually have problems getting your bearings to fit if you waterjet it to the nominal size of the bearing. Most waterjets are only going to have repeatability of about +-.002 to .005 inches.

This isn't going to be good enough to reliably cut a press fit for a bearing. We have waterjetted our sideplates since 2009 and have the bearing bores cut ~.015-.030 undersize so we can go back and remachine them to ensure roundness and press-fit tolerances. I know 233 waterjets them about the same amount undersize and then reams them to the proper size for the bearing.
__________________
2001-2004: Team 100
2006-Present: Team 254
Reply With Quote