EuroWire May 2021

Focus On Germany, Austria & Switzerland

Photo: luis-diego-hernandez • www.unsplash.com

Efficient, precise and easy multi-wire drawing

Maschinenfabrik Niehoff has more than 70 years of experience in constructing wire drawing machines. More than 1,600 MMH series multi-wire drawing lines are in operation around the world, manufacturing wires made of copper, aluminium and other non-ferrous metals. Based on close cooperation with wire and cable manufacturers as its development partners, the company has refined and enhanced the MMH technology. The latest result is the MMH 112 + RM 202 + S 632 multi-wire drawing line, designed for copper and aluminium wires. Launched four years ago, the line is in use by several wire and cable manufacturers. Special design details, high-precision components, a smooth wire path and sophisticated control technology enable the system to run reliably at speeds of up to 40m/s. This allows production output to increase while energy consumption decreases – based on the production volume. The drawing machine and the annealer stand on integrated vibration-damping machine feet, while the spooler is mounted on a base plate. This makes special foundations or grouting un- necessary. All motors are integrated in the line.

As with all MMH machines, the MMH 112 type is based on a modular system, and can be tailored to individual requirements with one or two levels, and in three different lengths for 21, 25 or 31 drafts. The drawing machines use a technology that enables a straight wire inlet, which results in fine wire quality and fewer wire breaks. Water-cooled motors integrated in the machine save installation and alignment, and labyrinth seals facilitate sealing between drawing emulsion and gear oil. Functionally optimised components such as final die holders and wire pointing devices are also easy to handle. The MMH 112 can be fully integrated into the digital system provided by Niehoff, allowing full use of the advantages of the Digital Assistant+.

The new RM 202 multi-wire resistance annealer uses the two-/three-zone system with or without wire reheating. The result is optimum wire drying and economical energy consumption. A new transformer technology for the annealer reduces energy losses by up to ten per cent. Wire movement is controlled by a random generator that causes wear on the contact tubes to spread more evenly, resulting in a longer contact tube life. In the S 632 dynamic single spooler, all of the electrical equipment is located in the machine housing, and the spool shaft is connected with a directly coupled motor. Belts are not required, which makes maintenance easier. Maschinenfabrik Niehoff

GmbH & Co KG www.niehoff.de

The Niehoff multi-wire drawing line

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May 2021