CNB Wheels for Dry Grinding High-Speed Steel: Specific Processing Energy and Energy Efficiency

Research on grinding high-speed steel with cubic boron nitride wheels has revealed challenges in evaluating the energy efficiency of grinding with diamond abrasive wheels made of superhard materials (SHMs) for hard-to-machine tool materials. These challenges arise due to the specific energy consumption index of the grinding process, which determines the ratio of effective grinding power. In addition to considering specific energy consumption and the energy efficiency coefficient of the process corresponding to the processing process, it is imperative to account for the wear of diamond abrasive wheels through the index of relative consumption of SHM grains in the working layer of the wheel during grinding. A novel relationship for calculating the energy efficiency coefficient (EEC) for diamond abrasive processing with SHM wheels has been proposed. It has been demonstrated that reducing the temperature in the grinding zone enhances the energy EEC. To achieve this temperature reduction, it is advisable to avoid metallic coating on the grains of SHMs and instead utilize an increased concentration of SHM grains in the working layer of the wheel. This adjustment results in an augmentation of the energy EEC, as elucidated by the proposed equation for calculating the EEC.