ZhangJiaGang KeDa Electrical Machinery Co.,Ltd.

In order to save weight ,leading car manufacturers planing on replacing copper conductors, of 6 mm2 to 50mm2 cross section, with aluminium conductors. The production equipment for aluminium wires-drawing lines, payoffs and bunching machines-must meet added and more difficult demands. Maschinenfabrik Niehoff has recently developed new aluminium multi-wire drawing and annealing technology.

Experience of the MH 120 type 2 wire intermediate drawing line with integrated RA 200 annealer,developed for drawing of up to 30 different aluminium alloys wire, has helped the design of the MMH 104/RMA 201 type multiwire drawing and annealing line. The line is designed for the simultaneous drawing of eight or sixteen aluminium or aluminium alloy wires from a maximum inlet diameter of 2.5mm to a finish diameter of 0.15 to 0.6mm with inline annealing and can work with a maximum speed of 31.5m/s. The wires have highly homogeneous and processing requirements.

The MMH 104 wire drawing machine can be used with different drawing lubricant supply systems and operated with drawing oil or drawing emulsion for clean operation. further features tailor-made for the specific requirements of aluminium wire drawing and a vacuum system for extracting oil mist from the drawing area and returning it to the drawing lube system.

The RMA 201 continuous resistance annealer is designed for aluminium and aluminium alloy wires. The two -zone annealing principle with short annealing sections, promotes economical and ecological energy consumption. The entire wire section from the final die in the MMH 104 to the end of the annealing operation is fully sealed off from the outside. In order to avoid oxidation of the aluminum wire surface nitrogen is used as protective atmosphere.

Niehoff’s D series double twist bunching machines are suitable for the bunching of aluminum and aluminum alloy wires. The one blow design results in a significantly reduced energy consumption and noise emission compared to conventional bunching machines. D- Series machines can be equipped with bows whose geometries and coatings are specially adapted to the requirements of aluminium wires. By means of a load cell inside the cradle, the wire tension on the spool is infinitely adjustable, monitored and controlled within tight tolerances across the entire bobbin filling. As an option , the bunchers can be equipped with the NBAT (Niehoff bunching automatic traverse) device that automatically detects spool flanges and controls the traverse width of empty and full spools by means of optoelectronic sensors.As the spools are filled perfectly , the strands can be paid off tangle-free and without wire damages even at very high speeds.

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