Facing The Pipe Butts; Checking Pipe Alignment; Possibility To Change Welding Parameters - Hürner CNC ECO 355 2.0 Manuel Utilisateur

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4.3.1

Facing the Pipe Butts

To ensure that the pipe butts are level, insert the pipe facing
tool between the machine carriages and turn it on (see Dis-
play 17). The machine then closes the movable carriage in
automatically in order to bring the pipes into contact with
the facing tool. Use the INCREASE PRESSURE and REDUCE
PRESSURE keys to adjust the pressure manually while the
facing tool is trimming the pipes.
Pipe facing should continue until shaving forms a continu-
ous blade that rolls twice or three times around the pipe
ends, so the butts are level. To stop facing, press the START/
SET key (or the movement pushbutton on the chassis, if pro-
vided). The machine then moves the movable carriage apart.
If you discover after the facing process that the butts are
still not flush and level, start over, insert the facing tool
and repeat the process. When facing is properly done, pipe
alignment has to be checked.
4.3.2

Checking Pipe Alignment

When the pipes are properly faced, close in the movable
carriage completely to check whether a potential vertical
and horizontal pipe misalignment is within the tolerance
allowed by the applicable welding standard. The maximum
acceptable gap between them is displayed (see Display 18).
If pipe alignment is in order, the welding proper can start.
If the misalignment is outside tolerance, the pipes must be
readjusted in the clamps and, if needed, facing has to be re-
peated. To repeat facing, press the OPEN key, which will set
the movable carriage back to the far end.
When the pipes align appropriately, move the carriage apart
for the welding proper by pressing the START/SET key (or the
movement pushbutton, if provided). If needed, the welding
process can be aborted by pressing the STOP/RESET key
4.3.3

Possibility to Change Welding Parameters

Subsequent to facing the pipe butts and checking the align-
ment of the parts to be welded, Display 19 shows, provid-
ed that manual data input is enabled in the configuration
menu. In Display 19, the welder can keep the parameters
that define the welding process, from the last welding by
pressing the START/SET key, if there are such parameters in
memory already, or he can adjust them to the welding at
hand by pressing the STOP/RESET key (see Display 20).
In all screens enabling manual input of welding parameters
(e. g., Displays 20 and 21), the ñ and ò cursor keys allow
moving on from line to line. The selected line of a param-
eter is changed using the alphanumeric keypad (refer to the
Info at the beginning of Sect. 4.2). The START/SET key is used
Version October 2022 HÜRNER CNC ECO 355 2.0 User's Manual
Face Pipe Ends
230°C ACT. 0.5bar
Display 17
Check Pipe Alignment
Max. Gap :2.5mm
Display 18
Do you want to use
data of previous
welding?
RESET SET
Display 19
Buildup pr. :030.5b
Heat soak pr.:010.5b
Heat soaking :0120 s
Change-over : 005 s
Display 20
Cool. time t5:0100 s
Cool. time t6:0800 s
Cool. pr. t6 :012.2b
Pressure ramp: 010 s
Display 21
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