Proper storage and maintenance of silicon steel coils and sheets are fundamental to ensuring the stability of raw material properties; the core principles are preventing moisture, rust, deformation, and surface damage. The precision insulation coating on silicon steel surfaces is delicate, and the steel substrate is highly susceptible to oxidation and rusting in humid environments. Therefore, the storage area must be kept dry and well-ventilated, with indoor humidity strictly controlled within standard limits; long-term exposure to open-air conditions, rain, condensation, or corrosive (acidic/alkaline) environments is strictly prohibited. Silicon steel coils must be stored upright or on specialized racks; haphazard stacking, squeezing, or heavy loading is forbidden to prevent irreversible damage such as core collapse, surface creases, or edge deformation. Cut-to-length silicon steel sheets should be stacked flat and categorized, with moisture-proof pads placed at the bottom and waterproof/dustproof film wrapping the exterior; batch identification and zoned management are essential to prevent mixing, impacts, or scratches to the surface insulation layer. Long-term storage requires regular inspections to clear accumulated dust and check for potential rust, ensuring-at the source-that the surface condition and electromagnetic properties of the raw material remain unaffected by the environment.
Protection and maintenance during deep processing are critical steps for preserving the original precision of the silicon steel and ensuring the quality of the processed core. Throughout processes such as slitting, stamping, stacking, and grinding, the surface insulation coating must be fully protected; direct contact with hard objects that could scratch or impact the surface is prohibited to prevent coating damage or peeling, which could otherwise lead to inter-laminar short circuits, increased eddy currents, or excessive equipment heating during subsequent operation. Processing equipment requires regular precision calibration and the removal of metal chips and debris to ensure smooth, flat cut edges and eliminate defects like burrs, edge chipping, or warping, thereby minimizing localized stress concentration in the sheets. Processed semi-finished cores require immediate protective treatment; during temporary storage, they must be covered to prevent dust and moisture exposure, ensuring cut edges do not oxidize or rust. Furthermore, forced bending or violent straightening of the silicon steel material during processing is strictly forbidden to prevent damage to the internal grain structure and degradation of magnetic properties, ensuring the finished core fully retains the material's inherent low core loss and high magnetic permeability. The assembly of the finished iron core and its subsequent routine maintenance directly determine the operating efficiency and service life of electrical equipment. During the assembly of stacked silicon steel cores, it is essential to ensure uniform clamping pressure to prevent localized over-pressure from causing sheet deformation or damage to the insulation layers; simultaneously, the laminations must be kept clean and dry, free from dust, metal filings, or debris that could obstruct the magnetic path or trigger faults such as partial discharge. Once the equipment is in operation, the core's status requires regular inspection-focusing on issues like abnormal vibration, noise, or localized overheating-and any loose binding structures must be tightened promptly to prevent lamination loosening and increased magnetic losses caused by prolonged electromagnetic vibration. Regular cleaning of dust and oil from the core surface helps maintain optimal heat dissipation and insulation, while avoiding prolonged operation under overload or ultra-high-frequency conditions prevents magnetic performance degradation caused by high-temperature aging of the silicon steel material. Standardized routine maintenance ensures the stability of the core's magnetic circuit performance, effectively reduces energy consumption, and significantly extends the overall service life of motors and transformers.
