LIBRARY ı6ıul 0) - Cranfield University

Pr(ign) Possibility measure of process being unstable
Pr(und) Possibility measure of undercut
P,. Maximum pressure exerted on the base of the weld pool by the [Pa]
column of molten metal
P,,., Pressure of the layer of molten metal in the crater of the weld pool [Pa]
9 Temperature [°C]
00V Average temperature [°C]
R Electrical resistance [0]
R2 Coefficient of determination of a regression model
ß Temperature coefficient of resistance [°C' ]
SE Standard error of a regression model
SO Contact tip-to-workpiece distance (stand-off) [mm]
SO, , SOact Actual stand-off [mm]
sow Estimated stand-off [mm]
SOf, SO,,,
d
SOfi tered
Stand-off value at the end of a welding torch slope path
Filtered stand-off estimation
[mm]
[mm]
SOnf Reference stand-off [mm]
SO ,q, SOreq Required stand-off [mm]
SOstaR Stand-off value at the start of a welding torch slope path [mm]
SW Welding travel speed [m/min]
T, T,,,,,, Plate thickness, minimum plate thickness
TC The component tolerance [mm]
T,, The welding wire-to-joint positioning tolerance [mm]
TT The torch guidance tolerance [mm]
JTI Tranfer Index
JTS]
J
Transfer Stability Index
V Electrical potential, welding voltage [V]
Vk The arithmetic average of all the voltage transient samples less than [V]
JVm,
, ,,, Q , Vmean
n
JVm-
or equal to Vmsan"
arithmetic average of the welding voltage transient samples acquired
in a fixed time period
The minimum value in the welding voltage transient samples
The maximum value in the welding voltage transient samples
JVpk The arithmetic average of all the current samples greater than Vm.
an
Vr,
q
Required welding voltage
V.,, Vset Power source set-up voltage [VI
V Peak voltage time: the arithmetic average of the time duration of the [ms]
peaks in the welding voltage transient samples
x'u
[V]
[v]
[V]
[VI
[V]