Development of preparation technology of the cutting tools for layered composite materials treatment

Processing of composite materials is difficult due to the nature of its properties, resulting in an intensive wear of the cutting tool. Its cutting part should have a high strength and hardness, and small wedge angle. To meet these requirements, the cutting part of the tool is made of hard alloy, but the formation of the edge with the geometry results in poor quality products. The article proposes to form a cutting edge tool by honing with diamond wheels using electrochemical processes that facilitate the process of cutting. For this it is necessary to determine rational modes of combined electro-diamond grinding of hard alloys with specific cutting edge geometry. The relationship between surface roughness and specific consumption of the diamond wheel depending on the diamond wheel growing current density and etching details current density are received during laboratory tests. It is found that when increase electrical parameters of the grinding, roughness decreases to 0.1 microns and the specific consumption of the wheel increases to 2.3 mm3/mm3. It is shown that the combined method of electro-diamond grinding has advantages over other methods. The treated surface has a sufficient quality and quantity of chips at the cutting edge does not exceed 10 microns. Recommendations on the appointment regimes for sharpening of the cutting tools for composite materials treatment are offered on the basis of the research work.

composite materials, cutting tool, sharpening, surface quality, combined grinding.