TPT-January-2015

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60 January 2015
Technology News
2015_11 TPT Schwarze-Robitec Ad Issue January 87x260.indd 1 12.11.2014 16:50:42
New draw
cell built by
Bültmann
A NEW machine has been designed and built for the drawing
of copper tubes up to 140mm in diameter. The double 600kN
draw bench works at a drawing speed of up to 60m per
minute and the drawing length amounts to a maximum of
11m.
The installation is equipped with tube charging and
separation equipment, draw bench with chain drive, prebench
as electrically lifting table, die stand, drawing carriage with
internal and external gripper systems, tube brake, discharging
and re-charging devices for drawn tubes and a cradle for
finished material.
The special features and highlights of the installation are
high efficiency and production flexibility; automatic inserting
of mandrels with centring device; automatic dimensional
adjustment; hydraulic controls of mandrel rod and closing
gripper; internal lubrication of tubes; drawing carriage with
quick changing system for working with external or internal
gripper system; product quality and efficiency; manipulation
of tubes without drop height, thus careful and low-noise
handling; all supporting elements for the tubes are covered
with plastic material; mainly electric drives are used for
controlling the machine’s movements; and efficient and low-
maintenance AC motors for drawing drive and all auxiliary
drive.
Two different diameter reductions may be simultaneously
drawn on this special drawing equipment. Due to the re-
charging system, one of the drawn tubes can immediately be
returned to the pusher track for a second drawing cycle. The
drawing machine is characterised by a compact and clear
design, ensuring small movements and good accessibility.
Bültmann – Germany
Website:
The machine
can draw
copper tubes
up to 140mm
in diameter