what the heck is this called again????

ok...i should know this being an engineer who's done designs with sheet metal.....



but whats the technical term for when you drill/cut a hole in sheet metal....and then press out the area around the hole in order to give the piece of sheet metal more rigidity.


i'll know it when i hear it...but i cant think of it! argh!

thanks

 

Ah... countersink? :?

 

Flange?

 

its like a counter sink thats pressed in on one side...and that pushes the other side out....

its a press operation that creates a flare....and i'm almost certain theres a technical term for it....but i cant remember!!

this is bugging me

 

like shown in the pics on this web page:

http://www.nittotire.com/blog_detail.asp?id=9

they refer to it as dimples.....


am i crazy here? i coulda sworn....

*shrug*

 

H/o Xtreme 4x4 used it on "Jeep Speed"
now where's my iPod... It's on there... I'll get back to ya

 

On the truss he call's them "flared holes"

 

i must just be going crazy...

oh well.....

I have the idea to use flared/dimpled holes to reduce the weight on the frame boxing on the 6......trying to find dies that will work for that heavy of metal

just an idea for now

 

Careful... You may pack with mud and then they'll rust through on both the frame rails and the boxing... It would make sense for weight though. Also, if one is to crack, the crack will stop in the hole.

 

yea i thought about the mud.....was thinking of drain holes, but I'm not sure if that would cause stress concentrations....

i could also just use some mildly thinnner metal for the boxing instead of the full thickness...

lots of options.....lots more thinking to do


found this for anyone who is curious btw...

http://tool.off-road.com/tool/Fab+1...Tsports/ArticleStandard/Article/detail/322511

 

I vote for dimpled, countersunk flairs.

I did a quick Google and couldn't find anything obvious...

 

speed holes

 

If you are worried about mud and rust, wouldnt you be able to weld a very thin gauge sheet over the holes? It may take away from the total weight loss, but will prevent any mud or water from entering.

 

I believe in the aircraft industry, they're called "lightening holes".

tommy b

 

http://www.lightracing.com/LightRacingTech/FlareHoleArticle_4x4Garage.pdf Check this out It explains the "flared holes" and shows some tools to do it. also a bit of history

 

Ive seen that term in some old street rodding pubs

 

I Always Thought It Was Called A Boss