#1
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Hammer forming technique
Hi Guys
Just after some advice on making a number plate recess like this? The sheet metal is about 1.1mm thick. I was thinking of using a hammer forming technique but what do you guys think?? Im interested in what others have done in this situation or similar. Thanks Bart
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Bart Risuccia |
#2
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Appears you are doing a LH Hatchback, very nice. I thought I spotto the makings of the Liftback door.
I would go the hammer form route.
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John EK Holden V8 |
#3
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Thanks mate, LX Hatchback but close enough
This is the beaver panel I just made, not finished yet but I want the option of putting the number plate recess. I like it plain as it looks cleaner but some people want as per original with recess. Thanks Bart
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Bart Risuccia |
#4
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I've recently had some luck hammer forming by using a sheet of thick rubber about 1 cm thick along with a big flat faced mallet. The rubber tends to hold the sheet along the flat surfaces as it flows down into the lower details.
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Bob Don't believe everything you think. |
#5
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Thanks guys
I have tried on galvanised sheet as a test and it didnt come out too well. I will try again, im thinking of using an air hammer with brass bit or chopping board plastic bit? Ill see how i go
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Bart Risuccia |
#6
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Use some cold rolled steel and you will get completely different results!
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Marcus aka. Gojeep Victoria, Australia http://willyshotrod.com Invention is a combination of brains and materials. The more brains you use, the less materials you need. |
#7
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Thanks mate I certainly agree.
Only thing is when I start on the roof eventually when I get to it I cant get cold rolled in that size which is around 1340mmx1360mm but I found Blackwoods sell 1500mmx2400mm in galvanised so gal will be difficult to avoid on the big stuff.
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Bart Risuccia |
#8
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Hi Bart,
I thought I'd toss in a bit of nickel knowledge on this shape: The offsets I am seeing here give me pause. The amount of step that needs to be pushed indicates (to me, at least) that you have a "draw" that might need to be addressed, to make those step-downs. I would almost be tempted to use a 5T or 10T press to shove that shape into/between some cut profiles at each end, glued and screwed to a bolster board base. The pusher can be whatever wood or pipe - but watch those offsets try to tear because of the forced reduction loads in those small areas. Lube may help - some gear oil mixed with Ivory soap flakes is good, cheap, and available. Sometimes I allow the press to move enough to get to the serious resistance level, and then I split the areas with a mini saw and shove again, making two little welded-in fillers to finish up....
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#9
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For me I would worry that the draw on the sides of the lower sections would pull the rest of the panel around.
I would put 2 cuts with the fen saw at the little wedge shapes on the side. I would do the whole job in the bead roller including the folds through the middle. I am thinking the center panel will end up to long because it is taking a shorter path at the bottom, it may require a cut through left to right to remove the excess. I would put that on a fold line because it would make it easier to clean up. The wedge sections I would put in last. First things first you would need a deep bead roller. In hindsight you probabley should have done the recess earlier in the panel build. Jim
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Nothing is to hard its just how much time you want to give it. Last edited by ozi jim; 02-05-2016 at 01:57 PM. |
#10
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I agree, I should have done this bit earlier, but live and learn I guess, I'm definitely learning here
This is what I got so far, not too good but I think it shows what Jim was saying about the panel turning. I feel disappointed in my self but I have to remind my self I'm learning and a beginner. I will smooth out this hammer form, excuse the rough look of it. I was thinking of putting this into my pullmax/vibro shear with male die and going for it that way. But from what you guys are saying above maybe I should not??
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Bart Risuccia Last edited by Bart; 02-05-2016 at 07:58 PM. |
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