Method for production and apparatus for production of...

Details Method for production and apparatus for production of... Method for production and apparatus for production of...

2011-02-08

2011-02-08

Ward, Jessica L (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S121000

Reexamination Certificate

active

07883586

ABSTRACT:
Technology scanning and irradiating grain-oriented electrical steel sheet moving in a rolling direction at a speed Vl with an elliptical spot formed by a laser beam in the width direction at Vc to improve the core loss of the grain-oriented electrical steel sheet, which adjusts the angle θs formed by the scan direction of the elliptical beam and the long axis of the ellipse based on the equation θs=tan−1(Vl/Vc) and which constructs the system for adjusting the θs by an optical system for laser irradiation comprised of a cylindrical lens telescope, scan mirror, and fθ lens arranged in that order, a system for changing the angle of the cylindrical lens telescope with respect to the scan direction of the scan mirror, and a system for changing the distance between lenses.

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