jig plate
#21
Re: jig plate
The aluminum is to absorb heat / minimize warping, right? I'm baffled by the lack of soot on the wood jigs How are you keeping them from catching on fire?
I have V-band flanges to weld on for turbine inlet/outlet/wastegate/BOV and 2 more in the exhaust system. what can be done to help keep these flat?
I have V-band flanges to weld on for turbine inlet/outlet/wastegate/BOV and 2 more in the exhaust system. what can be done to help keep these flat?
#22
Re: jig plate
Originally Posted by Captain Bondo
I have a 1" thick by 4" wide by 2' long piece of aluminum that I use for keeping flanges flat.
It has no holes in it. I clamp the flange to it. Clamps work with any flange- if you use the right clamps they also tend to be less "in the way" of where I am trying to weld. The aluminum conducts heat well and means I can do a lot of flange welding without overheating the flange. It also means I'm not dragging a piece of steel that big (it would be much heavier) around the bench as I move things to get at the welds. Also I use stainless flanges- it's minor but all of that contact with carbon steel isn't ideal.
My jigs are ------ wooden. Yup. Wood.
I only use them for fitup and tacking and they last a long time. I might get fancy and start making aluminum ones since it's a real breeze to weld with the new welder, but wood seems to work KO.
I have made about 15 header off that jig so far.
I prefer to fit everything up, then cut the runners off one by one and weld them up, then weld them back on.
I always wonder if I had a super rigid jig, and I welded everything up solid under a lot of restraint, there was a possibility of having locked in stresses due to distortion.
The wooden jigs acre actualy pretty light and stiff and fast/cheap to make.
edit: Here you can see aforemention bigass piece of aluminum, being it very versatile self:
It has no holes in it. I clamp the flange to it. Clamps work with any flange- if you use the right clamps they also tend to be less "in the way" of where I am trying to weld. The aluminum conducts heat well and means I can do a lot of flange welding without overheating the flange. It also means I'm not dragging a piece of steel that big (it would be much heavier) around the bench as I move things to get at the welds. Also I use stainless flanges- it's minor but all of that contact with carbon steel isn't ideal.
My jigs are ------ wooden. Yup. Wood.
I only use them for fitup and tacking and they last a long time. I might get fancy and start making aluminum ones since it's a real breeze to weld with the new welder, but wood seems to work KO.
I have made about 15 header off that jig so far.
I prefer to fit everything up, then cut the runners off one by one and weld them up, then weld them back on.
I always wonder if I had a super rigid jig, and I welded everything up solid under a lot of restraint, there was a possibility of having locked in stresses due to distortion.
The wooden jigs acre actualy pretty light and stiff and fast/cheap to make.
edit: Here you can see aforemention bigass piece of aluminum, being it very versatile self:
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05-20-2007 03:36 AM