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Unread 11-08-2011, 10:38 AM   #1
Jason_alex
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Welding to a uni-body

Hey guys,

Any advice for welding to a uni-body? I weld at work but I am use to thick ****... I am making rock rails for the 2001 Jeep Grand Cherokee and insted of drilling an tapping (to thin in my oppenion) I was thinking driving some nut inserts in and welding them in place. Any thoughts?

Thanks,
Jason

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Unread 11-08-2011, 11:02 AM   #2
CJ7-Tim
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Nut-certs don't need to be welded. If it make you feel any better, a few light tack welds will be enough.

Most store bought rock rails are attached with self-threading bolts.
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Unread 11-08-2011, 12:58 PM   #3
Jason_alex
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Yea I have seen them with tap bolts but I really want these rock rails to have the beef behind them... I am going to go with 3/8 grade 8 bolts and attaching it with 3 kick plates on each side tubing is only 2x4" 1/4" wall
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Unread 11-08-2011, 01:31 PM   #4
00JGC00
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Properly installed nutserts should do the job. That's what I have on mine. Two were giving me grief so I put some tacks on them and that worked well. I also ran self-tapping screws through the pinch seam into the sliders.
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Unread 11-09-2011, 06:15 AM   #5
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Most stuff I weld is 1" plus any special things to welding to a vehical with the pcm and computer stuff?
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Unread 11-09-2011, 07:27 AM   #6
Jason
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Disconnect the negative terminal of the battery. Obviously back the heat down a bit to prevent burn-thru. I've seen an article about welding unibodies, but it escapes me right now.
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Unread 11-09-2011, 04:00 PM   #7
Jason_alex
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Lol I thought I wouldn't change my settings... and see what happens lol jk jk
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Unread 11-10-2011, 09:41 AM   #8
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low voltage- low wire speed and dont burn through. sheet metal bolts secured properly to the uniframe will do just fine, just make sure to use some strong bolts on the pinch seam- grade 5 or better.

ill try to post some pics up of my WJ rock rails.
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Unread 11-10-2011, 12:48 PM   #9
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I am trying to go without the pinch plate seam because I have the Laredo model and don't really want to get ride of the plastic.
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Unread 11-10-2011, 12:59 PM   #10
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Quote:
Originally Posted by Jason_alex View Post
I am trying to go without the pinch plate seam because I have the Laredo model and don't really want to get ride of the plastic.
Bolting them to the pinch seam gives them a lot more strength.
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Unread 11-10-2011, 01:21 PM   #11
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http://www.mallcrawlin.com/forum/sho...-Welding-Bible
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Unread 11-10-2011, 07:38 PM   #12
AGDubyaJ
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Originally Posted by smunns View Post
Bolting them to the pinch seam gives them a lot more strength.
x2, even if you do decide to weld them on, you should still bolt them to the pinch seam.
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Unread 11-11-2011, 06:51 AM   #13
Jason_alex
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I am only thinking about welding the nut-certs on to the frame to bolt to..... is there any way to get around the pinch plate seam and still gain the strength?
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Unread 11-11-2011, 08:52 AM   #14
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Problem is the pinch seam gives the sliders up and down support. The way I look at sliders is a lever effect and the pinch seam is the fulcrum, there is usually not a hole ton of pressure on the frame as the pinch seam holds most the up and down force.
Without attaching it to the pinch seam you will probably end up having them sag and you might run into issues of the sliders legs pushing though it. As the pinch seam spreads the load out over the length of the slider.
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Unread 11-11-2011, 11:37 PM   #15
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Also ground as close to the welding area too.
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