Tech - Can you ID this tool

I'm looking for the proper name for the tool used to form the metal as shown in the following photos... This tool was quite handy and it only took 20 - 30 minutes to form 17 holes - but it took a few hours to make the tool !
If anyone sells such a tool, I would like to purchase others... Now I have one for 1 1/2 diameter holes, but not all sheet metal holes will be this size...
email dave@team321.com if you know where to purchase these...

 

I have a page showing more detailed photos:
http://team321.com/tooldie/tool.html

and this is the effect the tool has on the sheetmetal. This improves the look of a flat piece of steel as well as making it more rigid.

dave
http://www.team321.com
Cocoa Beach FL

 

Dimpler?


jerry

 

Greenley (SP?) electrical knock outs do basically the same thing. You drill a small hole put the two pieces together and tighten them down. They also have fancy hydraulic ones too. I don't think it would be hard to modify them to roll the edges of the hole to get the effect that you want.

Hope this helps, Don

 

http://www.vansantent.com/sheet_metal_machines/dimple_dies.htm
thanks... I searched for metal forming dimple die and found the link above... thanks again for the info.
dave
Cocoa Beach FL

 

They were called flanging dies at the machine shop I worked at.I don't know if thats a true name or just what they were called there

 

http://www.toolup.com/KnockOut-Dies...;7BB5E7CAD8-A5AA-4D46-AB36-0A418279C506}.html
there is also a tool that will make square holes. i will find out who makes it and post that too.

http://www.panelpunches.com/products/diesets.php

 

http://mittlerbros.com/

go to sheetmetal tool index, select "punches and flares", Cheap but good.

 

Lightening hole punches,and also belling dies.

 

I second the Flange Die

 

Belling tools are what I always heard them called. Been around for years, the type you have make "bells" the metal to the angle of the punch the ones that I have make a much deeper bell and are easier to make as you only have to cut diameters not angles. I think that the bell or flare also adds more stiffness. I am attaching a picture of the tool and the belled holes on an aircleaner that I made.
Rex

 

Dimple die according to every old cat Ive every worked for

 

They are called "Dimple Dies" in the aircraft industry, and you can buy them seperately or complete sets, just do a Google search. I'm sure its cheaper to buy one than your time to make one.

 

i've always called em dimple dies.

 

Belling dies , yes, they ain't cheap, www.tricktools.com......I made one yrs ago out oak on a wood lathe. Only used it for 2 friggin holes then, never again.
BARRESSE'

 

Check this out: http://www.vansantent.com/sheet_metal_machines/dimple_dies.htm

 

Did you notice that this thread is three years old?