All MetalShaping

Go Back   All MetalShaping > General Metal Shaping Discussion > General Discussion
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #6  
Old 11-27-2018, 08:43 AM
seventheaven seventheaven is offline
Member
 
Join Date: Oct 2013
Location: Dorchester, UK
Posts: 21
Default Dimple Dies

I've made my own dimple die.
I drew up a few in CAD and spent most of an afternoon making one.
I thought I was saving money - right up to the point I had it heat treated.
DOH!
If anyone else wants a go the dwg files are here:
http://www.super7thheaven.co.uk/blog...-cad-drawings/

Personally, having made one - I'm buying my next ones





What I'd like to know...
Is there any rule for selecting the hole size in relation to the panel?
How close can I go to the edge of a panel? etc.
Yeh, I know I could use FEA but then I'd need the whole body in CAD.

There seems to be 2 types of dimple die. Ones that leave a flat portion in the centre and ones that don't. The ones with a flat washer like bit in the middle (still has a hole).

I have a dimple die from a swap meet a few years back (It's stamped 32mm - similar to above CAD) and it leaves a swage ring with a 39mm internal diameter. To get a dimple die hole to look like my previous post, I used a 38mm /1.5" hole cutter.
The problem was getting the dimple die central on the oversized hole.

Is my 32mm die really a 39mm die?

Am I doing it wrong?

Should I use a 32mm hole cutter and leave that extra ring?
Should I leave that 'ugly' ring or can I remove it? I'd have to cut n file it out and that could leave a messy finish (and potential weak points).

If I use the bigger cutter, what's the rule on picking it's size? e.g. for a dimple with a 50mm internal diameter, what sized cutter should I pick?

How do other people centralise them? As the press applies pressure, on a test piece, I could see the sheet metal slip around as the flare was created.

Should I look for different flare tools?

Any help appreciated
__________________
Mark

www.super7thheaven.co.uk
Reply With Quote
 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 06:42 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.