Increasing the load-carrying capacity of screens of magnetic drives

This article demonstrates how the application of programmed hardening makes it possible to increase the loadcarrying capacity of screens by 20-25%. The mechanism of programmed hardening is based on diffusion and microshear processes which are accompanied by the redistribution of dislocation clusters from the areas with higher density to areas with lower density of dislocations. The screen of the magnetic drive has the form of a thin-wall cylinder which seals the apparatus. Reduction of the thickness of the wall of the screen would be beneficial since the torque on the drive shaft is approximately inversely proportional to the square of the gap between the half clutches. To conduct programmed hardening, it was necessary to construct equipment for force loading, heating systems, and also devices for the automatic maintenance of the appropriate parameters: the rate of increase of load and temperature. It was possible to increase the limit of proportionality from 255 to 369 MPa and also to reduce the wall thickness of the screen to 3.5 mm. Includes a diagram of the magnetic drive.