بلاگ

Excessive lamination burrs are common processing defects of transformer electrical steel. Burr overrun will trigger multiple core performance problems and hidden operational risks.

Excessive burrs reduce core stacking factor seriously. Protruding burrs occupy stacking gaps. They make steel plates unable to fit closely. The overall stacking density decreases. Magnetic resistance and no-load loss rise significantly.

Burrs easily pierce electrical steel insulating coatings. Sharp burr edges scratch surface coatings during stacking. It causes local coating damage and interlayer short circuit risks. Additional eddy current loss generates at damaged points.

They increase transformer vibration and noise. Uneven burrs lead to unbalanced core gaps. Local gaps produce irregular magnetic vibration. The whole equipment noise increases obviously.

Burr stress causes local magnetic performance deterioration. Shearing burrs bring residual mechanical stress. Stress distorts local grain structure. It leads to rising iron loss and decreasing magnetic permeability.

The core solution is to optimize shearing equipment and molds. Replace worn cutting tools regularly. Adjust cutting gap parameters to control burr height within 0.02mm standard range.

Add professional deburring process after cutting. Use precision grinding equipment to remove tiny burrs. Ensure flat and smooth steel plate edges before stacking.

Carry out stress relief annealing for burr-affected areas. Annealing eliminates residual cutting stress. It restores original magnetic performance of electrical steel.

In short, excessive burrs damage transformer core energy efficiency and stability. Standardized cutting and deburring processes can completely solve such processing problems.