Rothenberger ROWELD P160-630B/Plus Instrucciones De Uso página 26

 Once shavings with a thickness of < = 0.2mm are steadily exiting the milling machine, press
the control lever rightward and guide the machine apart.
 Turn off the milling equipment, and wait for the planing disks to stop. Remove the milling
equipment from the basic machine, and place it in the storage case.
 Bring the work pieces together, and let up on the pressure by opening the pressure release
valve.
 Check to see that the welding surfaces are flat, parallel and axially aligned.
Should the joint surfaces show any misalignment, repeat the trimming procedure. For
best results the workpiece ends should not be mismatched by more than 10% of the wall
thickness and the maximum gap between the joint surfaces no more than 0.5 mm. This
recommendation does not release you from your obligation to observe national welding
guidelines. Clear away any remaining shavings with a clean brush.
CAUTION! Do not touch the trimmed, ready to weld surfaces. Ensure that the
surfaces are free of any and all containments and foreign objects!
3.2.3 Welding
Risk of injury! Keep a safe distance from the machine when mechanically closing
clamps and moving workpieces. Keep hands, limbs and objects such as clothing,
tools etc. away from running machine!
 While moving workpiece ends to welding position, read the workpiece drag pressure from the
manometer on the hydraulic unit.
The workpiece drag pressure is the minimum amount of pressure required to set the work-
piece – depending on weight and length – in axial motion. This value must be precisely de-
termined; it will be necessary to engage and disengage the machine and workpieces several
times and to set the pressure adjustment valve until the machine almost comes to a standstill.
Add the drag pressure to the conformation, heat-penetration and joint pressure.
 Insert the heating plate into the basic unit between the two workpiece ends and make sure
that the heating plate's supports are seated in the notches on the take-off device.
 Engage the machine, set and maintain the required conformation pressure plus drag pressure.
 As soon as sufficient bead has formed around the entire circumference of the workpiece
ends, slowly release the pressure by slowly opening the relief valve.
Set the pressure so that workpiece ends have uniform almost pressureless contact to the
heating plate (warm up).
 Now close the relief valve. Ensure that the workpiece ends still have contact with the heating
plate.
 After the warm-up phase, disengage workpieces, remove the heating plate and re-engage
the workpieces. Increase the pressure linear to the respective joint pressure and maintain that
pressure until the joint is fully cooled.
 Regularly check the pressure and pump it back up when necessary. If the pressure loss is
excessive, have the hydraulic system checked.
CAUTION: Press and hold the control lever for the first 20 to 100 seconds then release
(neutral switch position).
 Put the heating element back into the storage case.
 After the joint has fully cooled, slowly release the pressure by opening the relief valve,
unclamp the workpieces and remove from the machine.
 Disengage the basic unit, write protocol. The machine is now ready for the next welding
cycle.
All welding parameters can be found in the enclosed welding tables.
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