Re: Let's practice STICK WELDING, and proper weld bead applications.

PHM bros,

Its weekend again and hopefully I could squeeze in a chance to try my hand on my still brand new Yamato DC welder.

I've been surfing for some notes about welding when I came across this info (and would like to share with all of you), which should explain why the electrode clamp attaches to the "negative" terminal of this welder and the grounding attaches to the "positive" terminal.

The preferred polarity of the SMAW system depends primarily upon the electrode being used and the desired properties of the weld.
Direct current with a negatively charged electrode (DCEN) causes heat to build up on the electrode, increasing the electrode melting rate and decreasing the depth of the weld.
Reversing the polarity so that the electrode is positively charged (DCEP) and the workpiece is negatively charged increases the weld penetration.
With alternating current the polarity changes over 100 times per second, creating an even heat distribution and providing a balance between electrode melting rate and penetration.
--taken from Wikipedia

Happy weekend to everyone!

Re: Let's practice STICK WELDING, and proper weld bead applications.

Brader Rosy. While practicing, I noticed a GI pipe here. Is 1/8 in dia 6013 enough to weld a 1in dia pipe and 12mm sq bar? Or 6011 instead?

Ariel bro, using a 6013 rod will be enough since the GI pipe is not really that thick. If you try a 6011, hehehe, butas at tunaw agad yang metal mo 😮 kasi for deep penetration ang 6011 and it needs high ampere setting usually for root passes to melt both metals being joined. 😉

Re: Let's practice STICK WELDING, and proper weld bead applications.

I made another very very simple exercise since I remember what bro jonathanscruz said in one of his replies in another thread also related to welding that he has a target that is why he wanted so much to learn how to weld and if I remember correctly, that he aims to do some metal grill works. Well whatever it is this simple exercise will fit his target if he would just practice applying weld beads one at a time so that he gets himself familiar on how to apply it.

And here's what I have prepared and done:

Again from the scrap metals I have gathered, got the round 12mm round bars, cut some pieces and arranged them into something again, but whatever the image would be formed is not important, what's important is the intention to join these pieces of round bars together by simply tacking or doing spot welding only.

Applied tack welds on every metal joints of the front side.

Re: Let's practice STICK WELDING, and proper weld bead applications.

Now the back side.

And applied also welds on the back side

And this is how the welds of the front appeared

Re: Let's practice STICK WELDING, and proper weld bead applications.

And to finish off every spot welds on every joints ; :p

THESE IMAGES ARE THE BACK SIDE.

Re: Let's practice STICK WELDING, and proper weld bead applications.

Now, why these exercises, well usually when doing grill works, weld weaving does not apply so much, its more on tack welding and then spot welding here and there specially when using square bars or round bars. So for bro jon, better get used to doing this kind of exercises so it would be easy for you when you start doing some metal grill works. Now it is up to you to use a grinder on the welds applied

Good luck on your target project !!! 😉 :funny:

Re: Let's practice STICK WELDING, and proper weld bead applications.

Salamat Brader Rosy. Pipe thickness is about 1/8in. I will use 6013. Hay. eto nga practice... practice.. and apply. Kasi, by June 9 dapat tapos na itong grill na pahabol ni SWMBO.

Re: Let's practice STICK WELDING, and proper weld bead applications.

My son and I started on a small project: shelves for our lumber. We got some 1x1 angular from the junkshop and proceeded cutting and welding. We made good progress.

Now the question: What's the proper way of cutting the angular with a small grinder (with steel cutting blade?

Do I start at the edges then cut the corner until the end starts to fall off then twist it off? Do I start at the corner?

Is there a technique to ensure the cut is squalado? Unlike cutting wood, it's quite difficult peeking into my cutting because of the sparks.

What I end up with is a cut end with lots of burr and twisted metal with edges that are not true-square.

Re: Let's practice STICK WELDING, and proper weld bead applications.

My son and I started on a small project: shelves for our lumber. We got some 1x1 angular from the junkshop and proceeded cutting and welding. We made good progress.

Now the question: What's the proper way of cutting the angular with a small grinder (with steel cutting blade?

Do I start at the edges then cut the corner until the end starts to fall off then twist it off? Do I start at the corner?

Is there a technique to ensure the cut is squalado? Unlike cutting wood, it's quite difficult peeking into my cutting because of the sparks.

What I end up with is a cut end with lots of burr and twisted metal with edges that are not true-square.

sorry for the question, might be a stupid one, did you mark the cut line? and what thickness cut off disc did you use for the sparks to hinder visibility? this might help. around the 3 minute mark is what your looking for.

sorry for the question, might be a stupid one, did you mark the cut line? and what thickness cut off disc did you use for the sparks to hinder visibility? this might help. around the 3 minute mark is what your looking for.

Yes. I marked the material. But the grinder's guard blocks part of my view and whatever's left, sparks block.

On thickness of the disc, shows you I know nothing about metalwork. I just picked up a cut-off disc meant for steel at Wilcon. Didn't know there were thicknesses to it. Seemed rather thin, though. Looks like made of black abrasives glued together in some mesh.
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Re: Let's practice STICK WELDING, and proper weld bead applications.

Yes. I marked the material. But the grinder's guard blocks part of my view and whatever's left, sparks block.

On thickness of the disc, shows you I know nothing about metalwork. I just picked up a cut-off disc meant for steel at Wilcon. Didn't know there were thicknesses to it. Seemed rather thin, though. Looks like made of black abrasives glued together in some mesh.
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Bosch or Dewalt thin slicer discs ... I've had good results using these. I believe these are 1/16" thick.

A few post ago I saw Joey81's pic of successful metal cutting using a jig saw with a metal blade.

In the end an Abrasive Chop saw will still be a better option. 🙂

Re: Let's practice STICK WELDING, and proper weld bead applications.

eto ang first day ng practicing ng welding.

then manage to fuse two metal bars....ayaw na tumigil sa pagwewelding...

Re: Let's practice STICK WELDING, and proper weld bead applications.

then yesterday bought some metal scrap at the junkshop...

and this is what i did habang nagpapractice na rin...

a welding rod holder...

naparami ata ang weld...kaka-addict kasi...hehehehe...
more practice pa...

Re: Let's practice STICK WELDING, and proper weld bead applications.

Clean metals are a prerequisite for Mig welding. The process became second nature to me now since I mig weld most of the time.

However I found that it's good practice for stick welding as well. I was surprised to see how easier it was to stick weld when I clean the metals I need to join.

Easier to start the arc.
Needs less amperage
Rods burn better
Weld beads flow smoother

I use an angle grinder with wire brushes or flap discs or at times just grinding discs to prep metals.

I also found out that metal working is around 90% fabrication / preparation and 10% welding. Other people's experience might be different though.

The Yamato DC welder looks very user friendly. When I started stick welding with my Powercraft AC welder I barely could start an arc let alone join metals during the initial tries.

The ground clamp is very very important too. If we try to make the connection secured ( clamped to a freshly grind ed metal ) then it's one less hassle out of the equation.

Re: Let's practice STICK WELDING, and proper weld bead applications.

a welding rod holder...

naparami ata ang weld...kaka-addict kasi...hehehehe...
more practice pa...

Jon, four to eight good spot welds could have been enough to hold the small pipe for your welding rod holder;;;;;;;;;;;;;;;;;;;;
But well I guess you were so eager to apply more welds on the metal, truly using the Yamato DC Inverter arc welder does really makes you want to continuously weld on metal, very easy to use with soft start, less weld spatters, less noise, only sort of hizzing sound when welding and less smoke or fumes. :p

Well just continue practicing during your free time and concentrate first on applying weld bead one at a time, saka na muna ang weld weaving, familiarize hand pulse in applying these weld beads. Weld weaving originated in applying weld beads close to each other and then applied in a continuous manner, IMHO. :boxing1: