INDUCTOR FOR MAGNETIC ABRASIVE POLISHING

Inductor for magnetic abrasive polishing. The inductor has at least one electromagnetic coil which is surrounded by a circular cylindrical sleeve-like shell mounted coaxial of the coil. The coil is held from rotation, whereas the shell is driven to rotate thereabout. The shell is made up of three coaxial rings disposed in a line, the end rings being made of ferromagnetic material, whereas the central ring is a spacing ring made of non-magnetic material. The external cylindrical surface of the shell has machined grooves therein disposed at a pronounced angle with respect to the axis of the inductor. The grooves form sharp edges with the generally circular cylindrical outer surface of the shell. The magnetic abrasive particles disposed on the cylindrical outer surface of the shell, when coming into contact with the workpieces, smooth down the peaks of the micro-irregularities of the workpieces, and at given moments, when magnetic abrasive particles are piled up on the shell and there is a risk of jamming of the machine, the particles are taken up in one or more of the inclined grooves in the cylindrical surface of the inductor. The sharp outer edges of the grooves concentrate the abrasive ferromagnetic particles, and they thus intensify the machining or grinding process.