Wire Guides and Straightening
Rollers - type A or
AT
Field
of Application :
The straightening
of cables, strips
and wires is performed
in steps with successive
stages until the final
product is obtained.
To rationalize the
handling between the
different steps the
material is stocked
on reels or on bobbins
and takes forms which
are not natural.
For every production
step, it is therefore
necessary to carry
out the inverse process
by taking the material
off its support. At
that moment, the straightening
operation takes place.
It may be divided
into three steps:
The straightening,
consisting of putting
the material back
into its original
shape. The operation
is carried out by
the first straightening
rollers.
The removal of the
residual constraint
in the material, due
to the winding on
the bobbin. This operation
is performed by the
rollers located in
the central part of
the straightener.
The forming of the
wire carried out by
the last rollers on
the straightener,
generally placed at
an angle of 90°compared
to the angle of the
first rollers.
Often it is necessary
to combine these three
steps. That is the
reason why the straightener
uses 5, 7, 9, 11 or
even 13 rollers placed
in two planes.
The manufacturing
precision of the roller
has a major influence
on the quality of
the final product
(wires) as well as
on the service life
of the rollers. It
is therefore essential
that the rectified
"V" notch
on the outer ring
has the same geometric
characteristics and
precision as the rest
of the bearing. For
this reason, the notch
on a YITONG roller
is precise machined
prior to bearing assembly.
Grinding this notch
on an assembled standard
bearing is risky,
as the bearing may
be damaged. An acceptable
uniformity and geometrical
precision can thus
not be guaranteed.
The service life of
the roller is much
shorter and the quality
of wire drawing suffers
accordingly.
Among numerous applications
using thread guides
and straightening
rollers, YITONG has
managed to make a
name for itself in
the field of specialized
wire drawing companies,
producing steel cables
for the tire industry.
■The
following machines
use the same type
of special rollers:
• Machine tools
for fiberglass cables
(lawn mowers)
• Machines for
spring manufacturing
• Machines for
metal wires
• Machines for
spooling, un-spooling
and rewinding
• Fine and high
precision wire drawing
YITONG
is equipped with all
the necessary tooling
for the production
of such bearings.
Dimensions
of Straightening Rollers
|
