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Bill Edwards
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What thickness metal and what prep is being done?
Are you doing a root run then straight onto the weaved cap?
Are you doing a root run then straight onto the weaved cap?
dan.taylor.1
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Wouldn't two stringers be the preferred method horizontal?
Bill Edwards
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I'd have thought so, but it seems they've both been weaved.
I was never taught horizontal, only vertical with a weaved cap so don't know what it commonly taught, but as far as I know it seems the normal practice to run stringers on horizontal.
I was never taught horizontal, only vertical with a weaved cap so don't know what it commonly taught, but as far as I know it seems the normal practice to run stringers on horizontal.
Richard.
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Yes it would.
It would be a far superior weld with a root and two capping runs. (Providing there was good weld toe transition and good side wall and inter run fusion. I wouldn't chose a hot slow weave for a horizontal butt joint.
Liquid Metal
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Also, another suggestion.....
When prepping the plates for the horizontal, put a 45-50 deg bevel on the upper plate with a tiny landing edge perhaps 1mm max, leaving the lower plate square. Set it with a 2-3mm gap.
Rather than fighting gravity, it gives you a "shelf" to weld along if you like, making the joint like a cross between a butt and fillet.
Root with about 17v, 3.8m/min wire speed, gas 18l/min, with a cut back shroud so tip sits well out of shroud. Root with as short a stickout as possible gives you soo much more control having a low wire speed, without using too much of a push angle either 5-10degrees max!
Get the root in, then to fill it, turn up to a spray transfer 27v plus, or a very hot dip transfer if not confident using spray transfer,
Then to cap, weld as said above with stringers, with about 18v and 5.2-5.5m/min approx 160 amps
Best method i was ever been shown about 10 years ago, and has not let me down since, MPI, Ultrasonic, Xray tested welds included
When prepping the plates for the horizontal, put a 45-50 deg bevel on the upper plate with a tiny landing edge perhaps 1mm max, leaving the lower plate square. Set it with a 2-3mm gap.
Rather than fighting gravity, it gives you a "shelf" to weld along if you like, making the joint like a cross between a butt and fillet.
Root with about 17v, 3.8m/min wire speed, gas 18l/min, with a cut back shroud so tip sits well out of shroud. Root with as short a stickout as possible gives you soo much more control having a low wire speed, without using too much of a push angle either 5-10degrees max!
Get the root in, then to fill it, turn up to a spray transfer 27v plus, or a very hot dip transfer if not confident using spray transfer,
Then to cap, weld as said above with stringers, with about 18v and 5.2-5.5m/min approx 160 amps
Best method i was ever been shown about 10 years ago, and has not let me down since, MPI, Ultrasonic, Xray tested welds included
Rrunnach
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I guess plate prep would be dependent on WPS if welding to a standard.
Kent
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This is the problem with written stds and WPS they don't evolve much when someone come up with something new . Never remember doing what LM mentions but I cant see why it shouldn't work good and from what is also said about the testing done on them it apparently does.
