Accession Number : AD0697784

Title :   IMPROVEMENT OF EDDY CURRENT INSPECTION.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y BENET R AND E LABS

Personal Author(s) : Frankel,Herbert

Report Date : OCT 1969

Pagination or Media Count : 22

Abstract : Inspection time can be reduced 75% with a quadruple coil transducer which was developed to work with existing eddy current equipment. Its lower sensitivity can be compensated by increasing the available gain of the detection system. The principal disadvantage of the new transducer is the greater difficulty in adjusting the equipment as compared with the single coil transducer. The O.D. of tubes can now be inspected during finish machining because of an eddy current system which was developed to automatically compensate for changes in surface scanning speed caused by different diameters at the muzzle and breech ends. (Author)

Descriptors :   (*ARTILLERY, GUN BARRELS), (*GUN BARRELS, *NONDESTRUCTIVE TESTING), DEFECTS(MATERIALS), CRACKS, RIFLING, TRANSDUCERS, ELECTRIC FIELDS, MACHINE SHOP PRACTICE, QUALITY CONTROL

Subject Categories : Test Facilities, Equipment and Methods
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE