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Old 08-14-2018, 08:30 PM   #1
mongocanfly
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Question for the metal workers...

im trying to press a dimple in some sheetmetal...ive made a punch and somewhat of a die to try to attempt this...it does a good enough job but really distorts the surrounding flat sheetmetal...that's not surprising.....I punched several practice pieces and tried different methods for flatting out the metal...in the press between 2 pieces of flat plate seems to work best...does anyone have any recommendations that I havnt thought of?...this is just gonna be a one time deal so I'm trying not to spend a bunch of time on it....the 1st pic was just pressed between 2 pieces of tubing....the next 2 were pressed in the die piece....doing this in a hyd press
Trying to somewhat replicate the impression in the front panel of the radio box in the last pic.....
After zooming in real close on the factory radio picture, that factory impression is somewhat flatter...not a full radius...I may try making a flatter version punch and die and see what happens...maybe the distortion won't be as bad if the impression isn't so deep.....
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Last edited by mongocanfly; 08-14-2018 at 09:52 PM.
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Old 08-14-2018, 11:27 PM   #2
MP&C
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Re: Question for the metal workers...

Your punch and die pulls at the surrounding metal in an inconsistent manner, causing some of the puckering. You can either pre-planish to stretch the area where the punch and die needs the extra metal or planish afterward around the perimeter to stretch the areas that have pulled.

The best option in forming would be a beading die in a Pullmax (reciprocating) machine, as it does a more effective job of stretching as it forms. A bead roller will pull at the surrounding metal and add distortion, just as your punch and die does.
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Old 08-14-2018, 11:49 PM   #3
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Re: Question for the metal workers...

I believe I've got it solved now....I made a flat plate punch from 1/8" flat stock,,sandwiched it between some 1/2" plate...it worked great on my test pieces..your right Robert,I was trying to pull to much metal with the other setup....Im only shooting for close to original...not exact...and think this will work just fine...

(Robert...btw it says your message box is full)
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1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver

Last edited by mongocanfly; 08-15-2018 at 12:08 AM.
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Old 08-15-2018, 11:30 AM   #4
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Re: Question for the metal workers...

Awesome, you are stud!

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Old 08-15-2018, 07:23 PM   #5
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Re: Question for the metal workers...

Haha....more like redneck blacksmithing.....
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RIP Dad
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1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
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