Tecnodue I.T.S. PT 355, Руководство по эксплуатации

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I.T.S. Ital Trade Services PT 355 Operating Manual
14
4.5 Welding cycle
To obtain the best result we strongly suggest allowing the use of the machine only to experienced operators
The welding phase is composed by 5 phases with 5 different times:
PHASE 1 = t1 = Time requested for the bead formation with the specified wall thickness
PHASE 2 = t2 = Time requested for the continual heating
PHASE 3 = t3 = Time requested for the change over
PHASE 4 = t4 = Time requested for bringing up the pressure
PHASE 5 = t5 = time requested for cooling down
Pressure-Time diagram for butt welding
PHASE 1 = Heating up t1
a) Fit the heating mirror taking care that the temperature of the surfaces is the one selected
b) Bring the lever
A (Hyd. Unit) into position A3 in order to have the bead formation as per attached table, this operation must be done
with the true welding pressure value: ( Inertial pr P1 ).
c) Check the Bead formation wall thickness according to the attached welding table
PHASE 2 = Heating up t2
a) After bead formation act on lever E (Hyd. Unit) anticlockwise in order to bring the pressure nearly to zero and proceed to the heating
time t2 at pressure P2
PHASE 3 = Change over t3
a) Elapsed the heating time at pressure P2 bring the lever A (Hyd. unit) into position A2 and remove the heating mirror and immediately
bring the lever A into position A3 and acting on lever E clockwise put in contact the two pipes
PHASE 4 = Bringing up pressure t4
a) Achieve the true welding pressure value: (Inertial pr P1 = P5 ) by checking the pressure gauge, This operation must be done
according to the time indicated into the attached welding table.
PHASE 5 = Cooling Down t5
a) Bring the lever A into position A1 and keep such situation for all the cooling time indicated into the attached welding table, taking care
that the pressure will not decrease too much
b) Elapsed the cooling time by acting on lever E anticlockwise bring the pressure to zero.
c) Take away the pipes welded
Important !!!
In case of any doubt please refer to the specific instructions