chassis jig design

[1meansnake]

Almost there.. there was minimal warping with this method, although there was a bit on the short overhanging end pieces. Will have to reverse this by some heat and force on the ends. Nothing major though. Had to brush up on my MIG skills as I have only been using TIG for while now. TIG would just make the warping much worse.

The braces are thinner walled than the main pieces - just extra material I found sitting around. Should have this up and running under the car within the week.. can't wait. The Carr-Lane leveling feet (part CL-8-SLF) work perfect.



Also set this up so I can put an 1" thick or so sheet of plywood in between the braces to drop the plumb bob on. A 4x4 sheet will fit exactly in between the two middle sections.

I don't understand how TIG would make heat input worse than MIG????

You have a foot pedal to control heat with TIG. Care to explain???

[hotrdblder]

with tig, you have constant heat going into the weldment, where with mig you cant stich weld it to keep heat to a smaller haz

[1meansnake]

Well i guess i have to know what sort of TIG you would be using b/c what you said just doesn't make sense to me. Wether you MIG for 1in and then skip 2in weld 1in and keep repeating that pattern. Once the trigger is pushed your a Xamps. With TIG (I have a Miller Dynasty 300DX) you can set the pulse, background current, etc..etc. Heck at the very least you can rock the pedal.....

[hotrdblder]

yes tig weld is cooler, however mig done properly will have less of a heat affected zone then tig

[dhondagod]

Posting these just to give ideas and make everyone sick...


Rest of the shop pics can be found here: http://www.race-dezert.com/forum/sho...d.php?p=260219


Chris

[1meansnake]

Thanks for that man...................no really........................................than ks.

[SVTforme]

Finally.. a post with the chassis jig in action. Even painted it for you David . Thanks everyone for all your input! The car is just sitting on there on wood blocks and on rollers for now awaiting the body and suspension cradles. Likely time to start a progress post now that I am done this detour.


Rear adjustable IRS cradle in progress:


As for the note about TIG vs MIG - the heat affected zone is the key. Think about the speed in which you typically TIG a part vs MIG on the same part (TIG is slower at least when I am behind the torch). MIG is typically faster, meaning the heat transfer to surrounding areas is going to be less (via the pricipals of conduction). When building this jig, we definitely saw a noticable difference in part distortion when comparing TIG vs. MIG. The degree to which they are different will most likely vary with operator skill. As David called it, we spent a considerable amount of time with the torch attempting to get rid of the distortion on the parts after welding. While we are only talking mm here, it is still enough to throw the flat surface off when you are looking at a 12 ft long part.

[Gordz32]

Ohhhh DAddy!
Rest of the shop pics can be found here: http://www.race-dezert.com/forum/sho...d.php?p=260219


Chris[/quote]