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question to those with dualmetal/trimetals

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  #1  
Old May 31st, 2009, 10:52 PM
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mattathayde
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Default question to those with dualmetal/trimetals

ok random question could any one that owns any of the listed rigs take a look for me and tell me if you see a seam on the brass/copper parts and if so if it is the same color as the metal there or if it is another color. i am trying to figure out the method of fabrication used on these types of rigs but dont have any of them.

reasoning behind this is that i am taking a metals class next semester that is "hollow ware" i.e. vessels or hollow shapes, and i think i might try to make a hookah stem for one of the projects if i can swing it but i need to figure out the method of fabrication on these rigs (im slightly doubting the stems are totally solid on all parts

-matt
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  #2  
Old May 31st, 2009, 10:57 PM
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Default Re: question to those with dualmetal/trimetals

umm....i can check in the morning but i think the hose port. There is a seam on the underside and its silver instead of brass. So to clarify the hose port appears brass but there is a silver seam on the underside. I ll check for sure tomorrow.
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  #3  
Old May 31st, 2009, 11:04 PM
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Default Re: question to those with dualmetal/trimetals

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Originally Posted by bradedup View Post
umm....i can check in the morning but i think the hose port. There is a seam on the underside and its silver instead of brass. So to clarify the hose port appears brass but there is a silver seam on the underside. I ll check for sure tomorrow.
thanks

on the stem pieces that are the bulbous parts could you also check if those have a small seam?

thanks
-matt
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  #4  
Old May 31st, 2009, 11:38 PM
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Default Re: question to those with dualmetal/trimetals

it's fairly modular. Each of the pieces seems to be made from a sheet that is usually formed intot eh needed shape and fitted from there. It involves a lathe and the proper tools. I forget the name of the actual process but it's basically stretching the metal and forming it into a bowl like shape. I am led to believe this because my double trimetal has no such seams other than on the hose port. I believe the stem is made in this way with an extruded pipe down the center and the heart is a solid cast piece of metal that is then adeed to with the ports and proper plates.
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Old June 1st, 2009, 12:06 AM
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Default Re: question to those with dualmetal/trimetals

On one of the parts where the brass meets the copper on my trimetal, there is a little bit of brass that appears to have dripped down when it melted during the assembly process. It's kind of cool to look at, actually.
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  #6  
Old June 1st, 2009, 12:21 AM
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Default Re: question to those with dualmetal/trimetals

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Originally Posted by kalutika View Post
it's fairly modular. Each of the pieces seems to be made from a sheet that is usually formed intot eh needed shape and fitted from there. It involves a lathe and the proper tools. I forget the name of the actual process but it's basically stretching the metal and forming it into a bowl like shape. I am led to believe this because my double trimetal has no such seams other than on the hose port. I believe the stem is made in this way with an extruded pipe down the center and the heart is a solid cast piece of metal that is then adeed to with the ports and proper plates.
o ya i forgot about that post a while back, its called turning, that kinda pisses me off since thats one of the few things we cannot do at my school. o well i will have to use other methods. the class im taking we hammer vessels out of flat sheet, same idea basically but the turning is much faster and more in the round... hmmm maybe i can figure out how to use our lathe at school to do turning, i will have to ask my prof

Quote:
Originally Posted by JimNibbles View Post
On one of the parts where the brass meets the copper on my trimetal, there is a little bit of brass that appears to have dripped down when it melted during the assembly process. It's kind of cool to look at, actually.
i would love to see a pic of that, is it on the out side? brass doesnt really drip (also if you get a part of a brass piece that hot it you dont get a run as much as a large melted area that just balls up kinda, no metal really runs when melted, more so balls up)
-matt
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  #7  
Old June 1st, 2009, 12:52 AM
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Default Re: question to those with dualmetal/trimetals

Turning! Thank you. I am saddened that I forgot the name of such an often used process. You can achieve a similar effect by simple hand hammering but turning make for a very symmetrical final product. I would love to have a hookah with a hand hammered look to it. Hammered steel looks absolutely awesome if done properly.
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  #8  
Old June 1st, 2009, 01:58 PM
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Default Re: question to those with dualmetal/trimetals

no seems on the brass but the copper is not solid copper it is a copper coating (with solid brass under it) mine has a line where the coating did not make it all the way around.
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  #9  
Old June 1st, 2009, 02:05 PM
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Default Re: question to those with dualmetal/trimetals

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Originally Posted by buddha548 View Post
no seems on the brass but the copper is not solid copper it is a copper coating (with solid brass under it) mine has a line where the coating did not make it all the way around.
hmmm interesting, i could see that being an ease of production since when you heat brass it copper plates it self and if it has steel in the chemical you use to clean off the flux and dirt after you solder (braze) it together you get copper plating

-matt
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  #10  
Old June 1st, 2009, 05:23 PM
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Default Re: question to those with dualmetal/trimetals

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Originally Posted by buddha548 View Post
no seems on the brass but the copper is not solid copper it is a copper coating (with solid brass under it) mine has a line where the coating did not make it all the way around.
Same with mine haha. I really want to get one of my stainless steel KMs dipped in copper or brass. Get the whole thing covered.
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