widos 4001 - Page 22

Kunststoffschweißtechnik
Starting and operating Chapter 5
25.06.12 Working instructions WIDOS 4001 Page 22 of 59
• Check the misalignment and the gap between the two pipes touching one the other.
According to DVS 2207, the misalignment at the pipe outside should not be higher than
0,1 x pipe wall thickness, the acceptable gap not bigger than 0,5 mm.
The right half of the table can be pushed backwards and forwards for the
misalignmentcheck.
Release both clamping levers at the front side of the table.
• In case of a misalignment compensation, a new planing should be performed.
• Take the adjustment pressure for the pipe dimensions to be welded from the table and add
the travel pressure.
• Set the so defined pressure value at the pressure limitation valve and check by actioning
the valve lever.
• Open the machine again somewhat.
• Take heat up time, max. change over time, cooling down time and bead height for the pipe
dimension to be welded from the welding table (Chapter: 6)
• Swivel in the cleaned heating element, brought onto desired temperature, between the
pipes, if necessary wait until the desired temperature has been reached.
• Drive the machine halfs together schock-free under the set adjusting pressure.
• When the prescribed circular bead height is being reached, reduce the pressure.
• For this purpose put the valve lever into position „pressureless“ until the desired heating
pressure is set (heating pressure = approx. 10% of the adjusting pressure).
• Now the heat up time begins. Press the stop watch and compare the actual time with the
desired time taken out of the table.
• Open the machine after completion of the heating time, pull the heating element out as
quickly as possible and drive the machine together without schock-free.
• The maximum time range for this process is given by the value for the change over time
taken out of the table.
• After completion of the welding pressure up-building, press the stop watch and maintain the
control lever for about 10 s in position „pressure“ so that the hydro tank may be filled.
• If required set the pressure again during cooling (the pressure for cooling is the same like
the set adjusting pressure).
• After completion of the cooling time release pressure, remove the welded parts and open
the machine.
The welding process is finished.