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The inside story of
our cold drawing dies team
They are the ones who have succeeded in producing the cold drown dies
Four years ago we bought them,
today we make them and sell them.
With the launch of the Special Profiles Division, one of the
greatest challenges was to solve the problem of the cold
drawing dies, which were bought at high prices from import
market. Today, such dies are manufactured by us at a quality
level at least equal to those purchased from experienced
external producers. In addition, in-house production of cold
drawing dies gives us more flexibility in the production of cold
drawn profiles and allows us to develop in a much shorter time,
and more economical, the production of new special profiles.
We are talking
about a very
dynamic process.
The lack of a
spare die can
block the entire
production.
Watch how
we manufacture
the special profiles
on our official
YouTube channel!
A team led by an experienced tooling engineer, Costel Radoi,
helped in design by Cosmin Serghiuta, along with three other
tool and die makers, managed to set up the production of cold
drawing dies, a very complex and demanding action, which
involved a lot of time, nerves and countless tests. "In the initial
phase of the project, dies were ordered from European
producers, but there was a problem with the last drawing step.
That's the reason why we've chose to make our own dies, to buy
the proper machinery and start testing until we've got the right
products, "said engineer Costel Radoi.
The Tooling Division executes
dies and set of dies for cold
drawing of profile steel bars.
Active part of the dies is
executed in carbide grades
CTM30 (G3/G30 equivalent
after ISO), with a hardness of
1120 HV30 inserted in steel
treatment body. This parts are
made based on the fitting
dimension of the die in the
cold drawing bench. A number
of input data are considered in
of input data are considered in
the design process, such as:
quality of the drawn steel,
hardness of it, intended for this
purpose. dimension of the raw
material, reduction degree
required, length of the final
product, shape, surface
preparing for the cold draw,
lubricant used on drawn, the
tolerances of the given profile,
cold drawn parameters, etc.
Also, the cold drawing dies can
be made according to the
documentation given by the
client. The dies are executed on
CNC wire electrical discharge
machines with 5 axis, after
which they are manual polished
by specialized personnel, using
special tools, diamond powders
and suspensions with
granulation form 2 μm up to 127
μm, with the help of special
tools intended for this purpose.