Jump to content
SAU Community

Recommended Posts

Another thing is tip profile, some use it sharp and others blunt? My problems have been relating to the arc wondering around everywhere and struggling to keep a pool. Havent tried blunt yet.

Comes down to whether you are using AC or DC and as stated previously depends on material.

Typically for steel and its variants (stainless etc.) use a 'sharp' tip, and for aluminium/magnesium, use a blunt tip. I've used a blunt tip for Titanium too with success.

For Aluminium, use a blunt tip (electrode thickness determined by wall thickness of panel/part etc.).

Don't use the same gas you use for stainless/steel MIG welding (which contains impurities such as CO2), but instead go for pure Argon for Al, stainless etc. Obviously depending on speed and penetration required.

Im only wondering about Aluminium as my mild and ss skills are already pretty good :D

Im using straight Argon for ally, mild and stainless. My filler rods are 5356. I can weld ally OK but would just like to avoid issues with contamination i had the other day, and to maybe weld a bit prettier. The ally i use ranges from 2000 to 5000, as well as donuts and madrels (dont know what grade these are).

My machine is a Unitig 200 single phase.

Sorry to half hijack Brad; i guess info/tips about how to go about achieving the results you do is of benefit to amateurs like me.

Vids on youtube about welding ally are pretty good, informing about balance and frequency, what they are and how they affect the weld; its just hard to relate it to my/another machines when the knob labels are different!

Im only wondering about Aluminium as my mild and ss skills are already pretty good :D

Im using straight Argon for ally, mild and stainless. My filler rods are 5356. I can weld ally OK but would just like to avoid issues with contamination i had the other day, and to maybe weld a bit prettier. The ally i use ranges from 2000 to 5000, as well as donuts and madrels (dont know what grade these are).

My machine is a Unitig 200 single phase.

Sorry to half hijack Brad; i guess info/tips about how to go about achieving the results you do is of benefit to amateurs like me.

Vids on youtube about welding ally are pretty good, informing about balance and frequency, what they are and how they affect the weld; its just hard to relate it to my/another machines when the knob labels are different!

There is your arc stability problem.

If you can get yourself a 3 phase welder. Instantly you will never go back to a single phase machine.

Dont be affraid to try sharp 1.6mm alloy tungstens either, if you can get the machine to preserve the grind during welding you'll be suprised how well a pointed tungsten will weld AC.

I use 5356 rods and a helium gas mix.

Ill never go back to using a pure argon after using helium.

Brad, you usee Varigon or something similar? Man, talk about Rollys Royce approach. I like it. I am no welder but even I notice the difference when welding with Varigon. You can get away with way less amps and welds so much nicer. We have to use it in the pharma industry as otherwise you cant achieve a no heat tint fusion weld.

...the second I know when I will be in Syd over Xmas I will call...

Brad, you usee Varigon or something similar? Man, talk about Rollys Royce approach. I like it. I am no welder but even I notice the difference when welding with Varigon. You can get away with way less amps and welds so much nicer. We have to use it in the pharma industry as otherwise you cant achieve a no heat tint fusion weld.

...the second I know when I will be in Syd over Xmas I will call...

Sure am.

Varigon is the linde gas name for their hybrid helium&hydrogen mixes.

I was using the BOC equivalent in a 20 something % mixture then moved to supagas which was a 27% mix.

I tried the He50 from linde and then settled on two bottles which I can mix my own with an external mixer and two regs.

Some stuff like sump pans I use up to 70% helium. Can weld a cast sump to 3mm plate with no problems at all.

Other things I'll drop the helium to 20% (rough flow estimations)

It was Ariel who put me onto helium a while back and when I really have to use argon for alloy now I cringe and just try to live with it.

My tips and tricks are spreading far and wide :)

Just scrolling thru, I noticed some talk about tungsten tips....if you have an inverter machine with hertz adjustment it is very easy to keep the tungsten ball to around 1-1.5mm which is ideal (well for me anyway), but then again it depends on the angle that you grind the tungsten at. All these little tricks all add up.

I decide to go against an inverter machine but with different settings, gas flow, tungsten sizes and cup sizes I can still maintain a very small ball on 2.4mm and 3.2mm tungstens.

The next step is try even smaller beads while maintaining same level if penetration.

All I can say is that for me, practice is the only way to start getting on top of it.

Here's a quicky that I knocked up this morning for a customers GTR.

Just a basic breather tank with a bottom vent to be mounted infront of the battery.

post-20349-0-94976100-1323299054_thumb.jpg

post-20349-0-12206800-1323299077_thumb.jpg

And a job ive been working on for a bit now which is finally completed.

post-20349-0-87127400-1323299113_thumb.jpg

post-20349-0-20734900-1323299138_thumb.jpg

post-20349-0-31948000-1323299191_thumb.jpg

Yeah the car had some dodgy arse shafts put in it.

Lambo wanted ridiculous money and they are a known weak point anyways.

The car is used constantly and does do circuit days so they had to be built better than the previous ones.

The inner porka CV is twice as wide as the lambo/Audi/VW original ones and the outer is identical to the original and 1/5th the price.

The cost to have these shafts made was less than one genuine shaft and 3rime stronger.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...