Machinability of cast irons at finishing face milling of flat surfaces by superhard materials

Abstract

The article presents the result of the analysis of machinability of cast irons with different physical and mechanical properties. The thermal processes that occur in the cutting zone and the influence of cutting modes and geometric parameters of the cutting elements of the face mills are considered. The possibilities of processing cast iron with various tool materials, in particular superhard materials based on cubic boron nitride (CBN), taking into account their physical and mechanical characteristics, force and temperature loads. The influence of cutting modes and geometrical parameters of cutting parts of CBN tools on their stability and reliability, and on the quality of machined surfaces of cast iron parts is carried out. On the basis of domestic and foreign scientific publications the analysis of advantages of use as tool materials of superhard materials on the basis of CBN for processing of pig-iron by the multiblade tool at which there is an intermittent cutting is carried out. Innovations in the market of metal-cutting tools, and the possibility of increase of efficiency of processing of flat cast iron surfaces of parts due to their use are investigated. It is planned to develop a milling machine equipped with superhard materials based on cubic boron nitride (CBN) with traditional and new cutting schemes with possible application of protective coatings on tool inserts, which could reduce the impact on the machining process, imperfections of technological processing systems due to its geometric parameters, new schemes and cutting modes and would increase its efficiency.

Keywords

• face milling
• face mill
• step milling cutters
• cutting elements