how to lay down wide beads.
Joined: Aug 2003
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From: DALLAS, TX, UNITED STATES
Re: how to lay down wide beads. (ineedhelp)
slow your speed down to 250 on your wire set and decrease your voltage around 18.5v and sweep from left to right slowly in u shape form...thats what i do to get a wide beed 
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Honda-Tech Member
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Re: how to lay down wide beads. (2MUCHBOOST4U)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2MUCHBOOST4U »</TD></TR><TR><TD CLASS="quote">slow your speed down to 250 on your wire set and decrease your voltage around 18.5v and sweep from left to right slowly in u shape form...thats what i do to get a wide beed </TD></TR></TABLE>
is that for tig welding?
</TD></TR></TABLE>is that for tig welding?
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Joined: Mar 2003
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From: Knoxville, tn, 37912
Re: how to lay down wide beads. (ineedhelp)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ineedhelp »</TD></TR><TR><TD CLASS="quote">
is that for tig welding?</TD></TR></TABLE>
No, he's talking about mig welding.
To get a wider bead while tig welding, you can either use more amperage, longer arc, or move the tungsten side to side...usually the first two don't wind up working out as well as the last one.
Also, don't be fooled into thinking that a wider bead is better, because if you get technical with it, it is NOT. Fact is that a good, solid, weld joint will be weakest in the heat affected zone. In other words, if you could pull the two pieces apart, it would break in the heat affected area next to the weld, not in the weld. Typicaly, a wider bead will have a wider heat affected zone.
There are many misconceptions in the field of manifold welding for auto purposes. I think the reason for this is because so many people got started in it without proper training. They know only what they have learned. It's like a person that learns all the math they know on their own and never had a math class or read a book. Could you imagine having to come up with all the **** Einstein and people like that did...on your own??
It's much better to be able to take somebody else's learned knowledge and then add on it for yourself. Many people that are welding manifolds for cars havn't done this. They learned in their garage or something and know only what they have personally done, without the additional advantage of learning from others that have concepts firmly based on past proven methods, physics, metallurgy, chemistry, etc.
Therefore, don't try to immitate what you see done by companies that weld automotive parts. Look towards companies that do work for NASA, military applications, AWS, ASME and organizations like that.
You can also catch some older versions of things like AWD D1.1 (Structural Welding Code) on ebay for pretty cheap. They have a lot in them about joint design inspection criteria and things like that. I know you may think you don't need to know anything about inspection, but unless you lift your hood and never look at a weld after you make it, you are already inspecting it...and my just need to learn the best criteria to base this inspection on.
is that for tig welding?</TD></TR></TABLE>
No, he's talking about mig welding.
To get a wider bead while tig welding, you can either use more amperage, longer arc, or move the tungsten side to side...usually the first two don't wind up working out as well as the last one.
Also, don't be fooled into thinking that a wider bead is better, because if you get technical with it, it is NOT. Fact is that a good, solid, weld joint will be weakest in the heat affected zone. In other words, if you could pull the two pieces apart, it would break in the heat affected area next to the weld, not in the weld. Typicaly, a wider bead will have a wider heat affected zone.
There are many misconceptions in the field of manifold welding for auto purposes. I think the reason for this is because so many people got started in it without proper training. They know only what they have learned. It's like a person that learns all the math they know on their own and never had a math class or read a book. Could you imagine having to come up with all the **** Einstein and people like that did...on your own??
It's much better to be able to take somebody else's learned knowledge and then add on it for yourself. Many people that are welding manifolds for cars havn't done this. They learned in their garage or something and know only what they have personally done, without the additional advantage of learning from others that have concepts firmly based on past proven methods, physics, metallurgy, chemistry, etc.
Therefore, don't try to immitate what you see done by companies that weld automotive parts. Look towards companies that do work for NASA, military applications, AWS, ASME and organizations like that.
You can also catch some older versions of things like AWD D1.1 (Structural Welding Code) on ebay for pretty cheap. They have a lot in them about joint design inspection criteria and things like that. I know you may think you don't need to know anything about inspection, but unless you lift your hood and never look at a weld after you make it, you are already inspecting it...and my just need to learn the best criteria to base this inspection on.
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