TPT-January-2015

Technology News

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: www.bueltmann.com

The machine can draw copper tubes up to 140mm in diameter

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