omisa 6160/LI, Use And Maintenance Instruction Manual

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O.M.I.S.A. Srl – 6160/LI - Use and Maintenance Instruction Manual - Version 1/2016
10/22
10. WELDING OPERATION
Insert the pipe and/or fittings to be welded and make sure that they are properly clamped into the
jaws.
Leave enough space to put the electric planing tool and thermoplate between then. The locking
efficacy is regulated by the adjustment of the brass pawl which is
positioned on the clamp’s upper
part.
Remember that clamps on the fixed carriages can be perpendicularly translated to the sliding axis of
the mobile carriage of some millimeters. Then it should be properly locked again. In this way it can be
avoid furthe
r alignment “mistakes” between the parts to be welded.
Before starting with the real welding stage, face pipes and/or fittings.
Place the electric planing tool between the two parts which have to be joined, using EXCLUSIVELY its
handle (picture 1, part C) and never through the turning plates. The handle, in fact, is equipped with
a safety switch which prevent any accidental starting of the electrical motor. Then, lock the planing
tool using the security hanger (picture 1, part D).
Always be careful during the facing stage, as it is very important in order to get a good final welding.
During this stage, due to safety reasons, it is needed to keep a hand on the movement hand-wheel
of the mobile carriage, and the other one on the control handle of the planing tool (picture 1, part
C) after locking the lever and established a light planing pressure of about 80N.
The facing process is finished and correct only when the result of the operation is a continuous chip
with the same thickness of the pipe and/or fitting on both elements to weld.
At this point, bring the electric planing tool back to its initial position and place the thermoplate
between the two parts to weld.
The heating stage starts when the two parts get in touch with the thermoelement surface. This stage
ends when the bead and the foreseen time are reached.
Then, bring the thermoelement back to its position as fast as possible and join the two heated
surfaces.
Operating on the movement hand-wheel, get the heated end parts in touch to each other.
Reach the required pressure and lock the spring-loaded rack-pinion device acting on the lever
Keep the two pipe ends in touch for the required time in order to allow a complete and gradual
cooling to obtain a correct welding.
It is very important, at this stage, that the welded parts do not suffer any kind of mechanical stress.