Installing The Steel Master Clamps - Hürner HWT 400–WeldControl Bedienungsanleitung

are available optionally which enable the production of
tees, Y branch-offs and crosspieces with several welding
operations. Segmented bends can be produced using
the standard master clamps set on the carriages of the
machine at the desired angle of the joint.
Steel master clamps are designed rather as a disk and
do not get wider. Along with the standard reducers, spe-
cial reducer inserts are available for them that enable
a slightly diagonal position of the clamped component
relative to the welding axis rather than its position per-
pendicular to the axis. This allows the manufacture
of segmented bends with a radius shorter
than usual, i. e., "acute-angled" elbows.
The carriages of the machine are designed for the use of steel master
clamping assemblies. They feature the angle charts and the arrange-
ment of threaded holes for the fastening bolts that are used for the
correct installation of these master clamping assemblies. If the machine
is meant to be used with cast-aluminum master clamps, an additional
base plate has to be installed on both carriages. This base plate fea-
tures the angle charts and the hole arrangement for fastening bolts
which have to be used for the proper installation of this kind of master
clamping assemblies.
In the case of the order of a workshop welding system with cast-alu-
minum master clamps only, the base plates and the clamps will already
have been installed when the system is delivered. Remove them if the
system is meant to be used with steel master clamps added to such a
system as an option.

3.4.1 Installing the Steel Master Clamps

Start the installation process only if the site where the ma-
chine is located meets the requirements per Sect. 2.6 above.
Use appropriate lifting tools to perform the installation.
Caution
On both carriages of the machine, slide the brass bolts into the cen-
ters of rotation and install the clamps on them. To fasten them, use
the four provided bolts for each carriage (see figure below). For the
manufacture of segmented bends, turn the master clamps around the
center of rotation to align them with the desired angle in the chart.
Keep in mind that the angle value on the chart is the desired angled
of the finished bend. For instance, if you plan to produce a 45 deg.
joint, align both clamping assemblies on the 45 deg. value of the chart
rather than on the 22.5 deg. value.
The inner center of rotation and the inner angle chart on
both chariots are used to position the master clamps for
the production of segmented bends with a short radius;
Important
the outer angle chart and the outer center of rotation, for
straight joints of components and for segmented bends with
a standard radius.
Align the outside edges of the master clamps with the relevant angle
value on the chart. Fasten the clamps using four bolts on each of the
carriages: two in the slot at the rear, one each in the two slots at the
front. Arrange the bolts so they sit at the very edge or close to the
edge of the slots.
When the master clamping assemblies are ready, install the appropri-
ate reducer inserts in them if the size of the components to be welded
12
EN
HÜRNER HWT 400–WeldControl User's Manual
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
Nieder-Ohmener Str. 26
35325 Mücke, Germany
made of steel with
pipe supports on both sides
Installing the additinal base
plates for master clamps
made of cast aluminum
Version January 2020
Master clamps