Manufacturing Toroidal Core Process

The manufacturing of strips wound cores is a specialized process, which requires a high degree of precision. These cores are manufactured from selected coils of CRGO electrical steel to yield closely controlled electro-magnetic characteristics and dimensional accuracy.

Cores are wound after slitting is done as per the required shape, on the core winding machine. The Winding Machine automatically stops when the pre-decided dimension is reached. The start and finish ends are firmly spot welded.

After winding, the cores are stress-relief annealed to restore the magnetic properties. The cores are bonded where necessary, to provide increased firmness. All cores are spray painted and are tested for magnetic properties. Testing: Strip wound cores, unlike strip lamination, constitute a complete product and every core must meet the specified performance requirement. Consequently, quality control in the manufacturing of wound cores is vitally important at every stage of process.

Dimensional Tolerances:

The coils of CRGO Steel from which the cores are manufactured are carefully selected on the basis of tests carried in our laboratories to ensure that the correct grade of steel is used. Strict checks are made at every stage from winding to the final stage of spray painting to ensure that the finished product is of a high quality. Moreover, each core is subject to inspection and electrical tests at VSPL to make certain that our customers are provided with the specified performance requirement. Apart from being fully equipped to meet the exacting standards of testing required, VSPL possesses the technical know how, the research facilities and the necessary raw-materials.

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