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Re:Dishing a tank old school?
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TOPIC: Re:Dishing a tank old school?
#990382
Shores (User)
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Dishing a tank old school? 9 Months, 2 Weeks ago  
Hey guys. I'm using a tapered rubber mallet to dish the sides of my 800 Vulcan tank. It's going well, but at the back of the tank near the seat, I am hitting some sort of vertical rib or baffle inside the tank that is not allowing the side of the tank to bend in when I hit it. It's creating an elevated crease that I don't want. Haven't looked inside yet. Seems to be just a thin piece of metal since if I move beyond it slightly, the tank forms easily. Any ideas how I can deal with it? Hit it with a metal hammer?
 
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Last Edit: 2016/10/16 17:46 By Shores.
 

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#990397
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Re:Dishing a tank old school? 9 Months, 1 Week ago  
Need one of those nylon forming hammers. You can set it in place then whack the back face of the nylon hammer with a dead blow hammer to move the stubborn stuff.
 
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#991012
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Re:Dishing a tank old school? 9 Months, 1 Week ago  
I have the tank mostly dished, but want to hammer out a few ripples in the metal. If I heat the dish with a heat gun/paint stripper, will that soften the metal so it is more maliable?
 
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Re:Dishing a tank old school? 9 Months, 1 Week ago  
Hey Shores, shoot some picture of the problem. If there is internal structure you will need to deal with that before you can get any metal shaping done right.
 
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#991017
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Re:Dishing a tank old school? 9 Months, 1 Week ago  
It will take more heat than a heat gun to soften it enough for easier forming. "IF" you are not worried about fumes from the tank, a hand held propane torch will get it soft enough though. You BETTER post pics when you're done. Inquiring eyes want to see

Rod
 
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#991020
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Re:Dishing a tank old school? 9 Months ago  
In the end, there were no internal structures and I have burned out the fumes. I just got a few uniform ripples from going to fast from a single direction instead of hammering more slowly and evenly throughout the entire dish. That created some ripples that I am having a hard time getting out. I want random dents and the hammered affect, I just don't want the uniform ripples. I will not bondo it. Question: Will heating it with a torch make the metal softer?

Started out as this after my son dropped it.



Now I have this. Need to get the ripples out, paint it flat or satin, accelerate the rust in the dish and clear coat it.



 
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Last Edit: 2016/10/23 18:59 By Shores.
 

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#991033
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Re:Dishing a tank old school? 9 Months ago  
I would not use any heat to do the planishing. Try and make a dolly that you can reach down into the tank on the inside to counter acts he hammer blows. Your dolly would look like a slapper made out of some old leaf spring on a long handle you can bend to reach the inner surfaces. You will want to hammer off. Small hammer blows on the high spots and dolly under the low spots. you need a hammer that has a crown that matches the curve you are making. Sometimes I cut and grind a hammer to make a custom crown. you want to simulate a bulls eye pick. see this link for an example....http://joshlizer.blogspot.ca/2011_10_01_archive.html

Are all of your sanding marks going in the same direction? They should be. then it is easier to spot high and low differences. From the light it is hard to tell if you have sanding disk marks in there or high spots.

You might go here... http://metalmeet.com/forum/index.php and post your problem. Sure to be someone who can resolve this for you.

cool tank. If it won't come around you may have to do a skim cote to fill the differences, but I think most of that will come out unless there is an internal baffle you hammered up against at the pointy end of the tear drop.
 
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#991039
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Re:Dishing a tank old school? 9 Months ago  
gold03 wrote:
I would not use any heat to do the planishing. Try and make a dolly that you can reach down into the tank on the inside to counter acts he hammer blows. Your dolly would look like a slapper made out of some old leaf spring on a long handle you can bend to reach the inner surfaces.

Are all of your sanding marks going in the same direction? They should be. then it is easier to spot high and low differences. From the light it is hard to tell if you have sanding disk marks in there or high spots. .


Why would heating it not be a good idea? There's no way I could get a dolly in there due to the center divider that fits down over the frame backbone.
 
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#991074
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Re:Dishing a tank old school? 9 Months ago  
Nice Shores, that's looking cool!
 
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#991097
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Re:Dishing a tank old school? 9 Months ago  
Looks Good Steve!!
 
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