Installing The Cast-Aluminum Master Clamps - Hürner HWT 400–WeldControl Bedienungsanleitung

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is smaller than the diameter of the master clamps. When fastening
the reducers in the clamps, be sure not to damage the surface of the
clamps by impacts of the reducers or the tools you use.
If a short-radius segmented bend is planned, install the special
reducer inserts on both sides. Double-check that the master clamps
are aligned with the inner angle chart on the carriage, using
the inner center of rotation. Then, to process a 90 mm outside-
diameter component, install the standard 125 mm reducer in the
clamp, or for an outside diameter of 110 mm, the 160 mm standard
reducer. On both sides, install the special insert with the desired
angle (22.5 deg., 30 deg.) needed for the component in hand in
the now-ready standard reducer using the appropriate bolts.

3.4.2 Installing the Cast-aluminum 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 centers
of rotation of the previously installed additional base plates (refer to
the introductory paragraphs of Sect. 3.4) and install the clamps on
them. Which clamps are required depends on the welding operation
in hand: for straight and segmented-bend joints or, optionally, for
tees and crosspieces or Y branch-offs. Molded components can also be
welded using the optionally available clamping assemblies or welding
neck support.
To fit the cast-aluminum master clamps to the base plates,
the bolts have to be placed into the holes of the plates that
match the mark at the center of rotation used for the brass
Important
pin. When it is placed into the center of rotation surrounded
by a hexagon, the bolts have to be fitted into "hexagon
holes" and likewise in "square holes" when the center of
rotation surrounded by a square is used. The center of rota-
tion used depends on the (angled) joint in hand. Holes sur-
rounded by a triangle are meant for fastening the special
clamps for Y branch-offs, holes crossed out by an X mark, for
fastening the special clamps for tees and crosspieces (refer
to Sect. 5.1, 5.2).
On both carriages of the machine, the master clamp assemblies are
fastened to the base plates using three bolts each. For the manufac-
ture of segmented bends, align the outer edges of the clamps with
Version January 2020
Angle scale and arrange-
ments of fastening holes
for steel master clamps
HÜRNER HWT 400–WeldControl User's Manual
Inner and outer centers of rota-
tion on both carriages for the
installation of steel master clamps
Special reducer insert 90 mm
for short radius set into steel
master clamp fitted with
125 mm reducer
13
EN