Modernization of the Drive Belt Transmission for the Machining Center

The article discusses the issues of creating 3D models of the main movement drive of a horizontal machining center with a portal layout and improving the design of the drive belt. In creating a three-dimensional model, the expanded functionality of the computer-aided design system and specialized modules for the design of mechanical transmissions were used. A procedure for parametric modeling of a belt drive and creating parameterized design solutions in developing new transmission designs are proposed. A modified belt drive design with a toothed V-belt has been developed. The main idea of the modification is related to the presence of teeth in the transmissions on the sides of the V-belt and the transition from friction to engagement, as in toothed belt transmissions. A calculation algorithm for the toothed V-belt transmission has been developed. This algorithm can be the basis for comprehensive research of the proposed transmission, including full-scale testing to create a methodology for its design. A verification criterion for belt performance is proposed by assessing the pressure on the sides of the belt teeth. Options for adjusting design solutions in case of failure to comply with verification conditions are listed. An experimental calculation of the comparative efficiency of the proposed new design of a toothed V-belt transmission has been carried out, and its advantage according to some technical and economic criteria has been shown.