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Up Topic Welding Industry / ASME Codes / Form QW-484B, Machine Welding
- - By jsdwelder (***) Date 01-27-2011 12:24
Looking at QW 484B under the Welding Variables(QW-361.2) where they ask "Type of Welding"(machine) what are they looking for there? I might think they were looking for the process but the process is listed on the next line down. Anyone here work with this form?
Parent - By petty4345 (**) Date 01-27-2011 15:22
They are talking about "machine" welding as opposed to "manual, semi-automatic or automatic"
Parent - - By js55 (*****) Date 01-27-2011 16:37
It is not directly related to the process.
GTAW for example can be manual, semiautomatic, machine, or automatic.
SMAW is predominantly manual, though there are semi auto and machine applications, though I haven't been around them.
SAW can be semi auto, machine, or auto.
GMAW/FCAW can be semi auto, machine or auto.
And the variable is related to performance qualification.
Parent - - By Superflux (****) Date 01-27-2011 20:38 Edited 01-27-2011 20:43
I aint afraid to ask stupid questions.....So, what is "machine welding"? Please define it for me.
I was guessing that "machine" might be synonomous to automatic, but you list it between semi and auto.
Parent - - By js55 (*****) Date 01-27-2011 22:10
Without looking up the definitions the difference between the two has to do with the amount of operator observation and activity necessary. AWS considers machine welding a non standard term. It uses mechanized. ASME utilizes machine and automatic welding as its terms.
To me there is vast difference between the skill level of a SAW operator who will constantly surveil the volts, amps, travel speed, bead width, bead appearance, groove wall position, part and head position and angle, and flux burden, etc., and say, a LBW or EBW operator where almost none of that, if any takes place.
Parent - - By Superflux (****) Date 01-28-2011 02:05
js55,
Thanks for that clarification.
Parent - - By swsweld (****) Date 01-28-2011 03:25
To add to js55's reply, consider an AMI, Dimetric Liburdi or Magnatech weld head mounted to a tracking system(pipe, tank or plate doesn't matter). As the weld head travels...YOU can manipulate the arc with the programmer and/or the pendant. Increase/decrease current, amps, oscillation, dwells, travel speed, wire speed, etc. That is considered machine or mechanized welding.
http://www.magnatech-lp.com/

Now consider the same name brand systems making autogenous fusion(no wire added) welds on High Purity SS in a Pharmacuetical Plant. After you initiate the arc...the preselected program will complete the weld with no additional arc manipulation from the person. That is an example of automatic welding.
http://www.arcmachines.com/BrochurePDFs_English032502/Model%209%20series.pdf
http://www.arcmachines.com/Media/M21-series.pdf

Hope that helps.

Best of my knowledge, when I did Autogenous welding (not all that much) you could not override the program once started=Automatic
With machine welding, you can change something every second or not at all but it is not classified as automatic.
Parent - By Superflux (****) Date 01-28-2011 03:45
That makes it all come together now in my tiny brain.
Parent - By swsweld (****) Date 01-28-2011 03:46
http://www.google.com/search?client=safari&rls=en&q=type+of+welding+qw+484b&ie=UTF-8&oe=UTF-8

A couple of these forms might help.
Walter Sperko, a leader in ASME, simply list it as machine in his forms. A few of these are formatable if you need that.
Up Topic Welding Industry / ASME Codes / Form QW-484B, Machine Welding

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