Using a spherical seven-link mechanism in a device for cutting the lubrication grooves at a spherical surface

Abstract

A device for processing the curvilinear grooves on a spherical surface is designed with  builder mechanism  made in the form of a spherical seven-link articulated mechanism with two degrees of freedom,  in the output connecting rod of which a tool head is mounted with a multi-tooth cutting tool, rotating at a cutting speed around its axis passing in the center of the processed sphere, and describing the given locked trajectory with a feed rate at a rigidly fixed, processed spherical surface. The device allows to increase the maneuverability of the cutting tool relatively to the processed spherical surface. The dimensions of the links of the mechanism are determined, which allow the input links to obtain full rotation relatively to the stand.