Abstract
The magnetic barrel finishing machine was developed by applying the magnetic field rotation of an AC motor, whose rotor was removed. The electric and magnetic characteristics were measured by a trial machine, and the relation between the current and flux density was investigated. Furthermore, the flux density of the cylindri-cal space was measured in various directions. Informations on a new cylindrical type magnetic barrel finishing machine was obtained from the results of the experiments, and used to manufacture the new machine. The proper combination of the magnetic media, water, compound and abrasives can only determined by experiments. The media mass state in the direction of height was investigated, and improvement of the container was proposed by the authors. Based on the results, cast products of such precious metals as gold, silver and platinum were finish-ed by using a machine. This machine has succeeded in finishing precious metal castings with complex shapes and comparatively large sizes.
