Re: Welding Newbie

@rosy
thank you very much for the advice will follow your suggestion. Just bought a DC welding machine will arrive next week will wait for it. bought an asea 200d sa octopower tools.

Sir bakit kailangan dc welding machine sa 7018? first time to be using this kinds of welding rods, familiar lang ako sa 6013(ordinary), eutectic and stainless rods. Dami ko natutunan dito pati welding napabili tuloy ng wala sa oras 🙂

First of all bro, congrats on your newly purchased DC ASEA 200D stick welder, that is a good brand too. Request lang if you could also post pic of it if it arrives so others may also learn from it.

Si sir timber also puchased an ASEA 200 Tig inveter DC welder from Octopowertools mid last year and have attested by its quality and performance. Though this brand is a little bit pricey, I think it will perform well for your intended application. :p

Now going back to your question, on why a DC welder for a 7018 welding rod? Firstly let me state that I haven't used yet a 7018 welding rod though I have a kg. of that rod stored in my storage room. I have not used it because I do not have yet a DC welder, what I have is only a YAMATO AC welder. The following infos that I will share has been derived from some welding instructor and friends who have graduated from TESDA on welding sessions and also from some research done regarding the use of different welding rods in the internet. I encourage you too to do some readings sa internet so to expand more knowledge on welding so to speak. 🙂

I will start with the widely famous rod locally, the 6013s which can be purchased at any hardware store. Its first set of numbers like the #60.... stands for its tensile strength in thousands of pounds per square inch, meaning its weld applied has a 60,000 thousand tensile strength per square inch. The next number, #1.... stands for the weld position like flat or horizontal , possibly too for the vertical and overhead but will still need more practice in such position when applying welds. And the last digit stands fort the number or quantity of flux or coating in the rod. So this kind of rod is intended for fast fill, for better and nice looking weld beads and better for flat position and of low penetration.

The 6010 and 6011 rods are considered fast freeze and high penetration rods that would usually results in stronger welds.

The 7018 rods works perfectly for DC welding machines. The first two digits, #70.... stands for the 70,000 thousands tensile strength per square inch, obviously much better than the 6013 rods ha ! This kind of rod is more appropriate for your kind of application coz it produces considerable strength when welded plus using DC electrode positive (DCRP) REVERSE POSITIVE has the electrons flowing from the electrode to the work piece will enhance deep penetration. And I think we all know that DC stands for direct current.

High penetration rods are more suitable for welding thick and hard metals. They are also good for rusty steels and painted surfaces, they cut through the surface impurities or contaminants to reach sound materials to achieve good fusion of metals welded. 😉

Anyway here are some links that's worth reading and understanding :

http://www.metalwebnews.com/howto/weldrod.html

http://www.weldershop.info/282/types-of-welding-electrodes/

Again, hope this helps !!!!!! 😀

Re: Welding Newbie

And from the links I posted, I learned also that there is such a 7018AC welding rod, I wonder if this kind of rods are available locally. HHmmmmmmm This needs to be researched again !!!

Re: Welding Newbie

I think locally E7018 can be use in AC or DC welders.

Re: Welding Newbie

@rosy

Thank you very much for the very helpful response. Will surely post the pictures once na dumating yung welding machine. Actually I got the idea kay sir Timber regarding dun sa octopower tools and hinanap ko na lang sa sulit.com.

Pinagpipilian ko talaga is asea and rilon since mas mura kaso may promo ang octopower so ang price difference nila maliit na lang and mukang mas matibay since korean made.

Bumili na rin ako ng welding rod 7018, 6011 and yung 3/32 na pang stainless, subukan ko din since ang nagamit ko pa lang ay yung 1/8 sa stainless hirap timplahin nabubutas ko yero.

Thanks for the link sir dami pala klase ng welding rod!!! Kala ko 6013, eutectic and stainless lang at 1/8 size lahat 🙂 Dami ko natututunan dito.

Haay cant wait to go shopping sa binondo 🙂

@fortnapz
pwede rin pala sa ac ang 7018 sige sir try ko gamitin bukas 🙂

Re: Welding Newbie

Fork ng forklift

yung nasa left side may hairline crack na pero ginalapaan ko agad kaya ok pa. Yung right naman putol na.

close up ng lamat

Ginalapaan ko na ng 6mm plate tapos welding ko ulit, nag crack pareho.
Iniisip ko ay ibebend ko plate or gamitan ko ng makapal na angle bar at yun ang paggagalapa ko.

Re: Welding Newbie

Fork ng forklift

yung nasa left side may hairline crack na pero ginalapaan ko agad kaya ok pa. Yung right naman putol na.

close up ng lamat

Ginalapaan ko na ng 6mm plate tapos welding ko ulit, nag crack pareho.
Iniisip ko ay ibebend ko plate or gamitan ko ng makapal na angle bar at yun ang paggagalapa ko.

Parang mahina ang penetration ... 6011 rods are good nga for high penetration root passes if your welder can burn this correctly. To me it looks like it will need a more thorough preparation like beveling on the crack lines. Deep bevels. It's also very thick metal. I'm not sure if pre heating with oxy ace can help make better welds.

Re: Welding Newbie

from: http://www.forkliftaction.com/forum/thread.asp?trid=361

In response to the request for advice from an engineering expert I advise as follows.

Fork tynes are manufactured from steels that can be described as spring steel. THe most heavily stressed area is the heel because of the bend and change in the flow of stresses. The top radius at the bend is critical as too small a radius will result in a high stress concentration and the tyne will fail. And because this radius is critical damage to the radius can lead to cracking and failure.
Because this part of the tyne is critical it is essential that the composition and structure of the steel around this bend is uniform, and the heat treatment is also uniform.
It is virtually impossible to weld such a thick section together AND manitain a uniform composition of the steel and uniform steel microstructure. And unless there is this uniformity it is impossible to ensure a uniform outcome from the heat treatment.
Given forklifts are such high risk items the advice hence is that you would never repair a forktyne.
In respect of worn tynes, building them up is possible but once again the risks must be considered. Firstly why are the forks wearing? The forks should not be operating so they are incontact with abrasive surfaces - typically concrete floors. Drivers should ensure they never travel with the forks on the floor.
Finally straightening bent tynes - once again the risks must be considered. If they have bent at the heel then the steel there has already been heaviliy stressed so the risk of subsequent cracking and failure is much higher. Straightening can only be done with appropriate heating and then heat treatment and that can also increase risks of failure.
And once again why have they bent - in normal use they should never bend. Mostly bending results from either using a fork on its own (without reducing the load by 50%) or the fork tip is being used to move loads without recognising that the increased load centre may double the stress on the fork tyne heel. Both situations require serious risk assessment.

Hence this engineers advice:
1. Make sure forklift tynes are not abused and they should last the life of the unit.
2. And if they crack, bend or wear more than 10% due to abuse, replace them with new units.

Re: Welding Newbie

@ossie,
Nice read, guess I have to buy new set of forks.

But for curiosity sake we have welded the fork using 7018 rods at 130-140 amps. then ginalapaan din yung front and back portion. Will try it out bukas para lumamig muna yung bakal, with utmost care at baka bumagsak yung karga.

Kinatok ko yung bakal iba na ang tunog nya compare dun sa hindi nawelding guess nag iba na ang characteristic nya at hindi man bumigay sa welding baka sa ibang parte.

Re: Welding Newbie

I just saw this but have not read it yet.

http://www.instructables.com/id/Build-a-Microwave-Transformer-Homemade-Welder/

Re: Welding Newbie

@joaquim,
kahit ako ita try ko weldingin yan, pero of course, dapat dobleng ingat pag gagamitin na after ma repair hehe
and if im going to weld that, i use deep penetrating rod 6011 first before 7018 :).

more pics please 🙂

nakakatuwa dahil ang dami ng weldero dito hehehe

Re: Welding Newbie

My Oxy Fuel welding & cutting rig for smaller stuff.

Re: Welding Newbie

@jayl

is that available locally? a tiny ace torch would be handy for fine work, also for soldering roof holes.
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Re: Welding Newbie

@jayl

is that available locally? a tiny ace torch would be handy for fine work, also for soldering roof holes.
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I purchased the kit in the US quite sometime ago. I was not able to use it well because I could not find the Oxygen locally ( the Mapp gas is readily available ). Today while at HMR I found a lot of Bernzomatic Oxygen. I doubt that those will move quickly so I just purchased one first to make sure the canisters are not empty.

Re: Welding Newbie

thanks, i'm seriously considering an oxy ace rig.
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Re: Welding Newbie

some welding pictures using Asea 200D and 6011 welding rod 1/8 at around 120 amps