Combined drawing machines are primarily used to produce bars or tubes
from ring material.
Depending on the material (steel, brass, copper, aluminum, etc.), the
systems are composed of different components.
Drawing forces between 2 and 46 tons are generated to process the
Often a combined drawing machine consists of the following units: 1. Double pay-off
2. Coil-opening robot
4. Shotblasting machine
6. Drawing unit
7. Profile straightener
8. Hydraulic impact shear
9. Tube guide 10. 2-roll straightener
11. Two way delivery table
12. Chamfering machine
13. Double easy down collection pocket
The Double pay-off ensures faster feed of the starting material.
Each of the two crowns can be hydraulically tilted and refitted during
The fixed base frame has a driven turning device.
The carousel frame is equipped with integrated hydraulics and tilt
The control cabinet is operated either isolated or controlled by the
control cabinet of the drawing machine.
In addition to the foundation-less version shown above there is
also a stronger version, with foundation, which is used in particular for large diameters.
The Coil-opening robot provides the supply of the ring beginning into the prestraightener.
The fixed base frame has a driven turning device. The coil-opening robot can perform any movement by the operator by means of
joysticks, so that it is possible to open the beginning of the wire without
In addition to the coil-opening robot shown above, there is also
the classic version "RIBI".
The Prestraightener ensures the optimal preparation for the subsequent
The powered horizontal feeder is important for the strong bending
against the winding direction of the output ring. After the horizontal prestraightener the vertical prestraightener follows, in order to prestraighten the material on the other layer. Depending on the model, the rolls are set manually or by motor and are
always displayed digitally. In order to enable a quick conversion of the
machines, the machine has double rolls per shaft, so that a change of the
rolls becomes unnecessary.
The shotblasting machine brings the surface of the starting material in
the optimum state.
When machining steel and steel alloys, the material is mechanically descaled before
being drawn by a centrifugal shotblasting machine. This ensures that only
metallically pure material gets into the drawing die of the drawing machine.
The pushpointer ensures precise feeding into the drawing unit.
The direct impact of the ring beginning in the die can, depending on the
material and dimension, replaces the sharpening.
The impact force can be up to 920 kN. The simultaneous motorized adjustment of the die
holder ensures the optimal alignment of the die.
A large opening stroke prevents damage from the staking jaws during the
The conventional drawing unit consists of two drawing carriages, which
are driven by curves.
This hand-over-hand drawing process, developed by SCHUMAG at the time,
makes it possible to process material infinitely in a straight-ahead process.
Our further developed drawing units are characterized by roll-guided
drawing carriages, drawing curves made of cast steel and an electronically
controlled hydraulic drawing shoe control. Speeds
up to 150m / min and pulling forces up to 460kN are achieved.
Chaintrack drawing unit
The chaintrack drawing unit is a new generation pulling method.
consists of two chains that can provide higher pulling speeds than the slide
carriage method. In this case, drawing speeds of up to 400 m / min can be achieved. These
are particularly useful for larger batch sizes. Depending on the application,
the usual speeds are between 150 and 300 m / min.
straightener ensures the alignment of the profile material within the drawing
system in a horizontal and vertical plane.
The machine is
equipped with 7 or 9 straightening rolls, which can be adjusted manually or by
motor. Their position will always be displayed digitally. In order to enable a quick conversion of the machines, the profile
straightener has double rollers per shaft, so that a change of the rolls
The hydraulic shear separates the material on the fly, with two shanks.
The electric three-phase servo drive enables precise speed control of
the scissors carriage.
The high cutting speed and the fine adjustment of the shear rifles
enable optimal cutting surfaces.
The cut is also possible in stand mode.
A residual control can also be used.
If scissors can not be used (tubes, hollow sections, etc.), a saw unit
is mounted on the base instead of the scissor head.
The sound-insulated tube guide box can be moved manually or with a
It ensures a close guidance of the bars to the next plant unit by means
of different tube diameters.
If required, the tube guide can be supplemented with a side ejector and
The 2-roll straightener ensures precise straightness and high surface
The height-adjustable two-roll levelers have a fixed bottom roll and an
adjustable top roll.
The adjustments are carried out by motor. The adjustable components are hydraulically
All parameter settings are stored in the HMI system and are available
when setting up the machine.
Two-way delivery table
At the end of the drawing line a two-way delivery table for mutual
storage of the bars is arranged.
Depending on the use of testing equipment in the drawing line, the bars
classified as defective are ejected from the two-sided tray on the rear side.
The bars found to be good are ejected on the front.
conveyor screw system ensures precise and trouble-free alignment before the
bars reach the subsequent chamfering machine or the collecting table.
The bar material often requires a certain shape of the bar end, so that
the supply can be done easily in the lathes.
The chamfering machine provides the end processing within the combined
Double easy down collection pocket
The collection pocket provides a muted collection of the material.
The noise reduction is associated with a careful collection of the final
By using a double easy down collection pocket, consisting of
intermediate buffer and finished material pocket, it is possible to tie off and
remove a bar collar during ongoing production.
The entire system is controlled and operated using a modern electrical
Each process parameter is recorded and, if necessary, made available to
the operator, the maintenance personnel and the production management.
The electrical control is based on common standard components from
SIEMENS or other well-known manufacturers according to customer requirements.
Internet-based remote maintenance makes it possible to provide immediate
emergency assistance in the event of an incident.