A-Z tube Dusseldorf 2018 Previews
of the rod, then rotating the rod and upsetting the
opposite end – in an integrated secondary upsetting
station the machine. The thus produced bolt
blanks have a head at both ends. At the end of the
process, they will be cut in half. This means that at a
production rate of 180 to 200 pieces per minute the
machine actually delivers 360 to 400 bolts.
Manfred Houben, one of the two Managing Directors
of AMBA, sees great potential also for the production
of bolts with complex head shapes: “To produce
heads of complex shapes, we can arrange several
upsetting stations in a row to perform several, let’s
say, three or four, blows at one end of the bolt blank.
This is extremely helpful in order to cater to, for
example, the growing demand for increasingly bigger
flat heads. As all the upsetting operations take place
simultaneously, we can also produce sophisticated
head shapes at the same high rates.”
The machines can handle bolts with diameters
between 4 and 10 mm, in lengths ranging between
60 and 400 mm, depending on the rod diameter.
The new machines are built according to the all-in-
one principle which AMBA also uses in many other
machines designs. What makes the machines so
special is the fact that all process steps take place
within one single machine – everything from the
synchronized decoiler of the wire, upsetting of
the bolt heads and thread rolling down to placing
the finished products in an automated process in
transport boxes. As all process steps are mechanically
coupled, highest process reliability is guaranteed.
Thanks to the modular design of the machines,
additional functions such as pinching of the tip,
machining or milling of grooves or turning and
deburring of tube ends can be easily integrated.
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www.amba.de
TUBE NEWS April 2018
11