EoW September 2008

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The expression raising the bar
is more suggestive of athletics
than of wire production but the
concept is very well understood by
wire makers. An abstract of an article
on steel wire rod and bar production
begins: “Technical themes based
upon market needs . . .” It ends
with the warning, “Environmentally
friendly material excellence will be
necessary.”
The material in the middle is more
typical of technical journals, with its
concern for higher strength (at no
sacrifice of toughness andworkability),
precise control of rolling temperatures
(for more consistent mechanical and
metallurgical properties), and product
microstructure (such that subsequent
heat treating and double handling
may be eliminated).
No doubt abstracts on nickel bar and
rod – and copper bar and rod, and
titanium bar and rod – are similarly
bracketed at both ends by the “soft”
21st century considerations migrating
from general discourse into the
vocabulary of the laboratory and the
factory. Rod and bar must be friendly
to the environment. The rolling of rod
and bar must be responsive to the
needs of the market.
They have raised the bar on us.
The solid professionals whose pro-
ducts and services are reviewed here
don’t mind. From long experience
of meeting their expectations of
themselves, they can confidently
be expected to meet – and exceed –
these new ones.
rod & bar production
EuroWire – September 2008
DEM high-speed
ribbed bar
production
DEM Wire Rolling Technology, a company specialised in cold
rolling processes and well-known for its cold rolling cassettes,
has, thanks to its considerable experience on these machines,
developed a special high-speed ribbed bar line starting from
wire rod in coils and finishing with 4.0 to 16mm diameter ribbed
wire in bars in lengths ranging from 0.9 – 14m, running at speeds
of up to 8 m/sec.
The line generally consists of a double pay-off for wire rod
uncoiling, a mechanical descaler, a soap applicator unit, a rolling
unit (undriven cassette plus driven rolling stand), a twin axis
straightening unit, a cutting-to-length high speed flying shear
and an unloading bench with a special DEM patented bar braking
and unloading system as well as all auxiliary equipment.
High straightness of the bar is guaranteed by a special twin roller
straightening configuration unit which acts without any friction
on the material.
This concept avoids any form of wire marking compared to
other straightening systems. The smart design allows quick
and simple setting up of straightener roll adjustment for any
production change.
Straightening and cutting-to-length finishing lines for bar
production can also be installed on existing cold drawing/rolling
lines for coil production.
DEM Costruzioni Speciali srl – Italy
Fax: +39 0432 655484
Email:
Website:
High-speed ribbed bar production line ▲ ▲