My friend is polishing his frame, he wants to smooth the welds what do you think? - Sportbike Forum: Sportbike Motorcycle Forums
 
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post #1 of 6 (permalink) Old 12-10-2002, 09:38 AM Thread Starter
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My friend is polishing his frame, he wants to smooth the welds what do you think?

He has a 97 ZX7R and he is in the process of polihing his frame, he wants to smooth all of the welds, what do you guys think? any he should not and some he can do?

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post #2 of 6 (permalink) Old 12-10-2002, 09:41 AM
 
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I think it is best to leave them alone or polish them very little, it will weaken the welds.
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post #3 of 6 (permalink) Old 12-10-2002, 09:46 AM Thread Starter
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That is what I told him but he does not want to listen to me ( I used to weld for a living) So I figured maybe he will listen to you.

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post #4 of 6 (permalink) Old 12-10-2002, 10:10 AM
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Use a D/A. Very easily though. Just get the edges to roughin up. That is what we did.

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post #5 of 6 (permalink) Old 12-10-2002, 12:49 PM
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Re: My friend is polishing his frame, he wants to smooth the welds what do you think?

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Originally posted by BLACK Z
He has a 97 ZX7R and he is in the process of polihing his frame, he wants to smooth all of the welds, what do you guys think? any he should not and some he can do?
Absolutely, positively, DO NOT grind aluminum welds EVER.


Unless you're ABSOLUTELY, POSITIVELY, sure that they were welded with back-up plates in the frame and/or a back-up gas purge in the frame AND a total and complete release from the engineer who designed it saying it's O.K. to do. I seriously doubt that the manufacturing process allows for this. If it did, I suspect they would be ground from the factory instead of having that big old weld hanging there and it wouldn't cost much to do it on the assembly line. I would do no more than buff them, not even fine sanding. Because they're raised, they will buff up O.K. with just the pad and polish.

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post #6 of 6 (permalink) Old 12-10-2002, 06:31 PM
 
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Grinding welds

I used to work in the asme code pressure vessel industry(all welded stuff) grinding welds is ok but grinding flush was not encouraged-- most aluminum is alloyed and heat treated & the
welds are probably not as strong as the parent metal
so welds are left convex to add a little bulk & stength.

Luck:
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