Magnetic Abrasive Tool Research Articles

Interaction of a powder magnetic-abrasive tool with the surface of an articles in annular gaps

The effect of the shape of powder particles, their size, and the degree of irregularity on the characteristics of the actual contact of a magnetic-abrasive tool (MAT) with the surface of articles being machined is studied. It was established that the relative area of the actual powder contact with the surface is 4–10%. A model representation of an MAT is suggested in the form of tetrahedral quasistable formations and the features of powder tool formation within annular gaps in the form of quasistable volumes are described.

Mechanism of material removal in the magnetic abrasive process and the accuracy of machining

In this paper, we focus on the magnetic abrasive process as a sizing process and present a theory which explains the out-of-roundness error phenomenon based on force analysis of the material removal mechanism. The theory is independent of the size and material of the workpiece and the design of the magnetic abrasive machine tool. The theory results are verified experimentally. The limiting accuracy of the magnetic abrasive process, the machining time required to achieve specified accuracy of the workpiece, and the material removal rate are determined.

Rheological characteristics of magnetic-abrasive powders in a magnetic field

The size of particles of magnetic-abrasive powders, magnetic induction in the working zones of magnetic gaps, and the size of working zones have been studied for their effect on tangential and normal stresses which develop in magnetic-abrasive tools during polishing. Friction coefficients for the powder in magneticabrasive tools and in a tool—titanium pair are determined.

Magnetic properties of a powder magnetic-abrasive tool

A device for measuring the magnetic properties of powder bodies with a packed density close to the bulk density is described. The magnetic properties of porous bodies made of iron powder and of composite ferromagnetic abrasive powders of various granularities and various amounts of ferromagnetic components are measured and the magnetization curves are plotted.

Electrical resistivity of a particulate magnetic-abrasive tool

Electrical resistivity of a particulate magnetic-abrasive tool

Shaping of powdered magnetic-abrasive tools. III. Shaping of an annular rotating magnetic-abrasive tool

Shaping of powdered magnetic-abrasive tools. III. Shaping of an annular rotating magnetic-abrasive tool