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| Sheet Metal Forming https://www.warbirdinformationexchange.org/phpBB3/viewtopic.php?f=26&t=25802 |
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| Author: | A2C [ Thu Nov 20, 2008 10:45 pm ] |
| Post subject: | Sheet Metal Forming |
Folks: I was wondering if anyone knows any other alternatives to forming a bulkhead other than this: http://gunsight.jp/b/1/Fighter%20Factory-015.htm A guy in the EAA told me these's a litle hand held device which will do the trick too. Any other ideas? The end result is this: http://gunsight.jp/b/1/Fighter%20Factory-016.htm |
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| Author: | Cvairwerks [ Thu Nov 20, 2008 11:32 pm ] |
| Post subject: | |
Sure would like to have that stretcher press in my shop.... You can form them in the old fashioned way....hammering around a form and using shrinkers and stretchers to get the correct profiles. Finnish with planisher and then heat treat...Lots of parts done that way even today. It's starting to become a lost art. There are a couple of places that offer some small group instruction on the basics of hand forming. |
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| Author: | hang the expense [ Sat Nov 22, 2008 9:03 pm ] |
| Post subject: | Pressing |
I manufacture parts for various A/C.What do you need? Maybe I can help.The stretcher is sweeeeeeeet. |
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| Author: | A2C [ Sat Nov 22, 2008 9:47 pm ] |
| Post subject: | |
I might be talkin' to you soon! For now, I'd like to try it myself. There are two ways to do , I think the stretcher with a sweep, ot using T-0, heat treating, and then quenching. What would you charge to do a bulkhead like the one shown in the photo? Thanks |
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| Author: | Robbie Roberts [ Sun Nov 23, 2008 12:10 am ] |
| Post subject: | |
I'd start looking at Aircraft Spruce's catalog(www.aircraftspruce.com) or going to the auto spectrum, such as the restoration supply places, such as Eastwood Company. They have a lot of items directed towards auto sheet metal which could easily be used(and usually is) for aircraft fabrication. Robbie A&P KC2TYV |
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| Author: | Broken-Wrench [ Sun Nov 23, 2008 8:01 am ] |
| Post subject: | |
You have to start with a thicker material than you need with a strecher as you have to polish out the strecher teeth marks.. I like using the hydro form and drop forge. |
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| Author: | 262crew [ Sun Nov 23, 2008 10:11 pm ] |
| Post subject: | |
I agree with Broken Wrench however a more cost effective way would be to make a negative out of maple and beat your "O" material around the negative. |
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| Author: | A2C [ Sun Nov 23, 2008 11:55 pm ] |
| Post subject: | |
Quote: You have to start with a thicker material than you need with a strecher as you have to polish out the strecher teeth marks.. I like using the hydro form and drop forge.
I don't think this is a problem. If the "teeth marks" are at the end where the machine connects, then I would think that you simply cut 1-2" from each end. I think the real problem is the cost of the stretcher machine. |
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| Author: | Broken-Wrench [ Mon Nov 24, 2008 7:33 pm ] |
| Post subject: | |
Does anyone know the name of the plastic that you mix and pour into a bulkhead / circumferintual and it gets rock hard and you then pop it out and use it in a hydroform.???? I have used the plastic that is already hard and had to be cut to shape. |
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| Author: | 262crew [ Mon Nov 24, 2008 8:08 pm ] |
| Post subject: | |
Broken-Wrench wrote: Does anyone know the name of the plastic that you mix and pour into a bulkhead / circumferintual and it gets rock hard and you then pop it out and use it in a hydroform.???? I have used the plastic that is already hard and had to be cut to shape.
RPFEM |
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| Author: | Cvairwerks [ Mon Nov 24, 2008 8:19 pm ] |
| Post subject: | |
Tuff Cast and #709 are other possibilities... Any of the two part acrylic resins could work too if you support the die well enough. |
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| Author: | A2C [ Mon Nov 24, 2008 8:26 pm ] |
| Post subject: | |
Quote: Does anyone know the name of the plastic that you mix and pour into a bulkhead / circumferintual and it gets rock hard and you then pop it out and use it in a hydroform.???? I have used the plastic that is already hard and had to be cut to shape. Now that's a pretty cool idea. You can even use it as a mold ant put T-0 in, heat and quench. Very brilliant![/quote] |
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| Author: | Broken-Wrench [ Tue Nov 25, 2008 6:25 pm ] |
| Post subject: | |
Second question .. Has anyone tried to beat / form 2024-0 around plastic / resin forms... I never tried that but wish I would have..????? |
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| Author: | bdk [ Tue Nov 25, 2008 7:57 pm ] |
| Post subject: | |
Broken-Wrench wrote: Second question .. Has anyone tried to beat / form 2024-0 around plastic / resin forms... I never tried that but wish I would have..????? I've seen it done with quickset.
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| Author: | Rossco [ Wed Nov 26, 2008 6:20 am ] |
| Post subject: | Rolling?? |
Hammerforming or rolling around a die might be the way..Had similar dramas with the Spitfire frame cappings. |
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