Performing The Welding Process; Facing The Pipe Butts; Checking Pipe Alignment - Hürner CNC ECO 200 Manuel Utilisateur

In the screen for the diameter and the wall thickness of the pipes to
be jointed (see Display 10), the welder has to enter these data. Using
the entered data on material, diameter, and wall thickness or SDR ratio
of the parts, the machine computes the required pressures, welding
stage durations, and the heating element temperature.
It is possible to switch back and forth between the wall thick-
ness and SDR value lines with the ò key (see Display 11).
Info
When all data were entered, the parameters, along with the computed
SDR value or wall thickness, are displayed again for verification (see
Display 12). Any other change, if needed, can be started from here.
Confirm these values by pressing START/SET in order to go on to the
welding process proper.
4.5

Performing the Welding Process

To start welding, clamp the pipes into the machine chassis.
Use the appropriate reducer inserts if the component size is
smaller than the basic machine chassis. When the fourth clamp
of the machine is removed, tees and elbows can be processed.
Then, to launch the welding process, press the START/SET key.
When the welding parameters were confirmed or entered, pipe facing
starts.

4.5.1 Facing the Pipe Butts

To ensure that the pipe butts are level, insert the pipe facing tool be-
tween the machine carriages and turn it on. 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 continuous blade
that rolls twice or three times around the pipe ends, so the butts are
level. To stop facing, press the START/SET key. The machine then moves
the movable carriage apart.
If you discover after the facing process that the butts are still not level,
start over, insert the facing tool and repeat the process. It starts again
automatically When facing is properly done, pipe alignment has to be
checked (see Display 14).

4.5.2 Checking Pipe Alignment

When the pipes are properly faced, close in the movable carriage
completely by pressing the START/SET key, in order 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 14). If the mis-
alignment is outside tolerance, the pipes must be readjusted in the
clamps and, if needed, facing has to be repeated. To repeat facing, press
the OPEN key, which will set the movable carriage back to the far end.
When pipe alignment is appropriate, move the carriage apart to the
far end for the welding proper, by pressing the START/SET key. If
needed, the welding process can be aborted by pressing the STOP/
RESET key.
16
EN
HÜRNER CNC ECO 200 User's Manual
H Ü R N E R S c h w e i s s t e c h n i k G m b H
Nieder-Ohmener Str. 26
35325 Mücke, Germany
ENTER PIPE DIMENSION
Pipe Diameter:0250mm
SDR
PE-HD
Pipe Diameter:0250mm
Wallthickness:22.7mm
ESC SDR 11.0 ENTER
Face Pipe Ends
230°C ACT.
Check Pipe Alignment
Max. Gap
Version February 2018
:11.0
Display 11
Display 12
0.5bar
Display 13
:2.5mm
Display 14