Investigation of the Operating Modes of an Experimental Installation for Magnetic Powder Control

The problem of non-destructive testing production process automation is currently relevant. Automation allows not only control productivity increasing, but also significantly increases its reliability, owing to the influence of human factor reduction. The difficulties in magnetic powder control automation lie in the fact that it is necessary to realize the possibility of combined magnetization or sequential magnetization in several directions due to the different orientation of defects in the developed system. The aim of the work is to develop a mechanized magnetic powder control stand for cylindrical parts with a maximum size of up to 120 mm, having a central symmetry with respect to the axis of the part. The experimental stand for magnetic powder control consists of two solenoids that are fixed relative to each other on a base made of non-magnetic material. A magnetic core made of electrical steel is used to increase the magnetic flux and localize it in the center of the stand. The magnetization modes of the experimental stand are investigated and the input parameter values (input current and borehole) of the magnetizing device are determined to define sufficient magnetic field strength on the surface of the control object and the coil temperature of the device. The results obtained made it possible to provide for defect detection and reduce the solenoid coil heating up to acceptable values of 40° C and can be used to design and manufacture of stands for continuous monitoring of products made of ferromagnetic materials in the large-scale production.