Bead Build-Up Stage - HURNER Weld Control 315 2.0 Manual De Instrucciones

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
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35325 Mücke, Germany
P + P
P
1 t
t
1
The nominal temperature, at which the hydraulic and con-
trol unit should keep the heating element, can be changed
using the ñ and ò cursor keys. After such a change, the dis-
play shows the actual temperature changing slowly to the
new nominal temperature.
Be sure to wait for the display to show the new
nominal temperature before using the machine!
Important
The welding proper has the four stages in the diagram
above that are explained in the following sections. It is the
welder's responsibility to verify the correct welding pres-
sures and times.
Before the welding process starts, the drag pressure has to
be determined with care. Move the movable carriage apart
and turn the maximum pressure regulator counter-clock-
wise as far as it will go to have zero pressure in the hydrau-
lic circuit. Then push the carriage mover lever to its close-in
position while simultaneously turning the maximum pres-
sure regulator gradually clockwise. Watch the display and
note the pressure that "drags" the carriage sufficiently to
set it in motion. This is the drag pressure P
The exact drag pressure depends on various condi-
tions (pipe size and material, position of the ma-
chine, etc.) and has to be determined for every
Important
welding individually. The value P
pute the bead build-up, the heating, and the join-
ing pressures needed for jointing (stages t
t in the welding diagram, respectively).
5
4.4.1

Bead Build-up Stage

Use the welding value tables in the Appendix to look up the
joining pressure (i. e., the maximum pressure that will be
reached during the process, in the bead build-up stage and
at the end of the joining stage) appropriate for your situ-
ation. Then set the maximum pressure regulator to the ap-
propriate pressure while observing the actual pressure dis-
played on the screen, and move apart the carriage of the
machine. Insert the heating element ("hot plate"), move
the carriage in on it and press the pipe butts to the heating
Version May 2022
P
5
P + P
2 t
t t t
2 3 4
for this welding.
t
is needed to com-
t
HÜRNER Weld Control 315 2.0 User's Manual
+ P
t
t t
5 6
, t , and
1 2
t
27
EN