IN NOVATIVE METHOD OF FIXING DIAMOND GRAINS FOR IMPROVING THE PRODUCTION OF DIAMOND-ABRASIVE TOOLS

Introduction. The single-layer abrasive tool that provides for high machining accuracy, productivity, and ability to control the tool's cutter shape has a potential advantage over other types of abrasive tools. Problem Statement. The tools for high-precision shaping of parts made of high-alloy and heat-resistant steels are the most difficult-to-manufacture, economic attractive, and critically important in the segment. The manufacture of such tools by electrochemical overgrowth of diamond grains with metal on an electrically conductive body is a known technique. However, the traditional manufacture of these tools is associa ted with significant difficulties and the potential of such diamond products is used only by 15-20%. Purpose. The purpose of this research is to improve the manufacture of high-precision abrasive tools for processing high-alloy and heat-resistant steels at modern machining centers with computer numerical control. Materials and Methods. Electrochemical coating deposition has been made with the use of original method. The obtained coatings microstructure has been studied by the SEM and XRD techniques. The retention strength of diamond grains in a binder has been measured with the use of the designed device. Results. Technology for the manufacture of high-precision single-layer grinding tools by electrochemical metal deposition has been developed. It has been shown that between the steel body and the layer of metal that holds the diamond grains, there is created a thin layer of electrically conductive polymer with a high adhesion to both the body and the metal. This leads to a strong retention of abrasive grains and provides a high degree of grain placement uniformity, which is currently unattainable for the conventional technologies, as well as increases the stability of the sharp edges of the cutter as the most exposed tool parts. Conclusions. For the first time, a new class of high-precision profile tools has been created and tested. It allows the substitution of import at machine-building enterprises of Ukraine and gives access to foreign markets.