Quality requirements for aluminium strips for transformers

The aluminium strip of transformer is the key raw material of transformer winding. It is the strip of aluminum ingot after pressing and rolling.

Generally, 1060 aluminum strip is used for dry transformer. Its aluminum content reaches more than 99.6%, which is also called pure aluminum plate. Advantages of this series of aluminum plates: the most commonly used series, the production process is relatively simple, the technology is relatively mature, the price has a huge advantage over other high-grade alloy aluminum plates. With good elongation and tensile strength, it can meet the requirements of conventional processing (stamping, stretching) with high formability. 1060 aluminum strip is industrial pure aluminum, with high plasticity, corrosion resistance, electrical conductivity and thermal conductivity, but low strength, heat treatment cannot strengthen and the machinability is not good; Gas welding, hydrogen welding and contact welding, not easy brazing; Easy to bear various pressure processing and extension, bending.

Quality requirements for aluminium strip for transformer:

The surface of the finished product with no burr for transformer is smooth and without any mark, the plate shape is smooth, and the section is neat and neat through the chamfering process to realize the round angle and zero burr.

The aluminium strip for transformer is mainly used for inner winding of dry transformer.

The section of the aluminium strip used in the transformer is neat and round, and there are no burrs, loose rolls, bars, towers and other defects.

There should be no roller marks, black lines, bright spots, scratches, scratches and other defects on the surface of the aluminium strip for transformer. There is no oil spot, tear and blister on the surface of aluminum foil after annealing.