27 September 2024
Drawing, annealing and take-up machinery developed by NIEHOFF.
A large range of magnet wire use different materials in their constructions such as bare copper, copper alloys, aluminum, silver plated copper and silver. In order to meet particular requirements, certain characteristics must be reached, such as electrical and thermal values, mechanical properties, solderability, chemical compatibility, and corrosion resistance. The quality of magnet wire depends on the quality of the starting product, and this requires high-quality wire drawing and processing equipment.
A comprehensive portfolio of wire drawing equipment
For more than sixty years, Maschinenfabrik NIEHOFF has been developing wire drawing machinery that covers all process steps from rod wire drawing to super fine wire drawing. This also includes inline annealing, galvanic electro-plating, coiling and spooling. Wire drawing machinery supplied by NIEHOFF is used all over the world to produce wire from copper, copper alloys, aluminum, aluminum alloys, bi-metals such as copper clad aluminum and copper clad steel, plated copper, many other kinds of composites as well as wire made of special material with final diameters down to 0.014 mm.
Electronically controlled rod wire drawing
NIEHOFF’s most recent innovation in the field of wire drawing technology is the electronically controlled MSM 86 type minimum slip rod breakdown machine. The machine, built in one and two-wire versions, is designed for wires made of the above mentioned metals and other non-ferrous materials. The MSM 86 is based on experiences gained with the industrial application of the predecessor model MSM 85, which was introduced in 1998, and the continuous development of rod wire drawing technology achieved since then.
High quality wire surfaces
Being of modular design, the MSM 86 with electronic controls offers users improved process technology. The controls allow drawing/annealing with minimized slip, resulting in high wire quality, low wear and maximum energy savings. The optimized wire path, the innovative pressure die holders and the reliable fully submerged drawing process, all contribute to the high wire surface quality. The adjustable drives allow working with different wire elongations for each draft. This capability is especially useful when processing different materials. Capstans which are not in use are switched off. In addition, design changes have been made to reduce maintenance requirements and improve access to the different operation and maintenance areas. A quick drawing die change system reduces downtime when changing the machine setup for different dimensions and enhances productivity. The drawing machine also features a highly reliable mechanical sealing system to separate drawing emulsion and gear oil.
Maximum energy savings
The total energy consumption of the new MSM 86 machines is up to 10% lower than of its predecessor model MSM 85 and 20% lower than of conventional rod breakdown machines.
Matching annealer and take-up systems
The MSM 86 is designed to be combined with the new R 502 continuous resistance annealer. With an annealing power of 600 kW, the R 502 is the most powerful annealer made by NIEHOFF to date. Power consumption is reduced by 20% compared to state-of-the art DC annealers due to the newly developed voltage control system NAC (NIEHOFF Annealing Controller) and the AC annealing principle. Because each contact pulley has its own drive motor, the rotational speed of the contact pulleys can be optimally matched to different wire speeds minimizing slip on the contact bands and resulting in maintained high wire surface quality.
NIEHOFF also has developed different take-up systems like basket coilers and spoolers which correspond to the requirements of magnet wires. In order to ensure highest surface quality, each part of the annealer and the take-up system which comes in contact with the wire can be coated with a special protective surface layer.
Easy and efficient operation
Like all new machines built by NIEHOFF, the MSM 86 rod break down line is operated by means of the newly designed and standardized NMI (NIEHOFF Machine Interface), a network-compatible color touchscreen which features a clear task and user-oriented navigation structure and enables an easy intuitive operation.
Technical data MSM 86
Max. production speed 40 m/s
Max. production output 45,000 t/a (For 7,000 hrs operation and 80% utilization)
Max. inlet diameter 2 x 8.00 mm
Finished wire diameter 2 x 1.20 – 2 x 3.80 mm, 1 x 1.20 – 1 x 5.00 mm
Further processing into enameled wires
The result of the complete production process realized on MSM machines is wire with excellent surface quality and consistent and strict physical properties along the complete length and therefore ideally suited for further processing into enameled wires.