MODERN DEVELOPMENTS IN RECEIVING AND USING DIAMOND ABRASIVE TOOLS OBTAINED THROUGH ADDITIVE TECHNOLOGIES (REVIEW)

Abstract

Diamond-abrasive tools are widely used in industry in the processes of diamond-abrasive processing, and now the possibility of using additive technologies for its production is becoming relevant for them. The article focuses mainly on modern publications related to 3D printing technologies of the working layer of grinding wheels on metal connections, including selective laser melting (SLM) technology. It was established that the high volume concentration and small grain size of diamond particles are more likely to cause agglomeration behavior, which leads to more pores and cracks, thus reducing the relative density of the grinding wheel and the strength of the matrix, but this contributes to the exposure of diamond particles, that is, better self-sharpening of the 3D wheel. It is shown that between the digital models and the samples printed by SLM, a good correspondence of the pore morphology is maintained. For the SLM technology, the migration and marginalization of diamond particles during the formation of the melt zone were revealed through modeling and experimental results. These results have a potential value for understanding and optimizing the process of manufacturing diamond tools with metal bonding by the SLM method. The influence of ball forging parameters on the preparation of particles of composite diamond powder with Ni-Ti coating, as well as the influence of processing parameters during laser melting of the powder layer on compaction and defectiveness of the manufactured samples, was analyzed. Here is a series of 3D printed grinding wheels.