The lamination process of transformer cores is a critical step in core manufacturing. By stacking silicon steel sheets in a specific arrangement, it forms a closed magnetic circuit and reduces magnetic losses. This process involves steps such as material pretreatment, cutting, and stacking to ensure the core possesses good magnetic permeability and structural stability.
First, the surface of the silicon steel sheets is treated to remove oil and oxide layers, preventing any negative impact on the insulation between laminations. Subsequently, the sheets are cut according to the core dimensions. The cutting process must ensure smooth edges to minimize burrs that could interfere with the magnetic circuit. During stacking, a staggered method is employed where the joints of adjacent sheets are offset. This avoids forming air gaps that penetrate the magnetic circuit, thereby reducing reluctance and eddy current losses. During the stacking process, locating pins or fixtures are used for fixation to ensure the overall perpendicularity and dimensional accuracy of the core.
