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68nofussbus
Samba Member
Joined: March 28, 2007
Posts: 327
Location: Hot & Humid Florida
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 Posted: Wed Jul 27, 2011 12:45 pm Post subject: spot welds ? |
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welding in a battery tray and a right rear corner in a 68 bus, is it better to spot weld -let it cooll then grind it down or spot weld a little here and there until complete then grind all at once ? Im trying my welding techniques again on this rear corner since i welded a wheel arch in and got it to hot and it sunk in / what a mess , read a lot of forums already so please help a vw brother out !  |
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Derek Cobb
Annoying
Joined: March 11, 2004
Posts: 1911
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| Posted: Wed Jul 27, 2011 1:37 pm Post subject: |
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| I normally finish all my welds then grind. Just let it cool between spots and go easy when you grind. That can warp metal too. |
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eminence_front
Samba Member
Joined: January 28, 2011
Posts: 42
Location: Dallas, TX
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| Posted: Wed Jul 27, 2011 2:51 pm Post subject: |
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use a compressed air chuck to blow cool air on the welds after each spot weld. That can cool it 60 - 100 degrees quickly.
If you don't have a compressor, just pick up a couple cans of air-duster at your local frys, staples, wal-mart, etc. |
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68nofussbus
Samba Member
Joined: March 28, 2007
Posts: 327
Location: Hot & Humid Florida
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| Posted: Thu Jul 28, 2011 12:23 pm Post subject: |
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| im going to use a pneumatic angle grinder to grind down the welds , whats the best grit (course ) of whee/ pad to get ? going to napa tommorow so id like to ask the pros on the samba first , thanks |
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JerryMCarter1
Samba Member
Joined: January 07, 2007
Posts: 6244
Location: N.W. Phoenix
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| Posted: Mon Aug 08, 2011 1:15 pm Post subject: |
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cold rag -- 3/4 inch of welding -- no more
_________________
Experience always triumphs over hearsay and You get to select which theory to believe |
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