Vorrichtung zur Magnetpulverprüfung mit berührungsloser Magnetisierung

摘要

Apparatus for magnetic particle testing for longitudinal and transverse defects in the internal end regions of ferromagnetic, hollow cylindrical workpieces includes at least one elongated air-core coil formed from a current-carrying conductor 1 wound in a pattern which, in plan view, is a rectangular spiral with a plurality of parallel longitudinal sections 2 - 6 and extending perpendicularly thereto, a plurality of parallel transverse sections 8 - 12. <IMAGE>