Influence Of Tool Wear To Chip Shape Type During Turning1Cr18Ni9Ti

The important factors in the development of high-efficiency and high-precisionprocessing technology are chip formation and processing chip. Therefore, chipformation, chip curl and chip flow have important implications for mechanicalmanufacturing and machining.With the support of national natural science foundation named "A study on themechanism of the efficient heavy cutting tools cutting damage resulting from theircutting shell section materials", in order to investigate how to predict the damage ofcutting tools due to their cutting sell section materials, lCrl8Ni9Ti, usually causingserious problems, was studied under laboratory conditions. The present study showsthe effects of impaired cutting tools on chip shapes, which is a foundation for theprediction of adhesion wear and damage of cutting tools.First, according to the theory of slip line and slip line field analysis, a curled upchip model was established. Then, the Generation Mechanism of the chip upwardcrimp are introduced, and the characteristics of slip lines curl model weresummarized. Moreover, the chip upward crimp radius was analyzed.Second, on the basis of cutting experiments, the state of tool wear wasinvestigated. By simplifying the curled up model, the relation between the tool bladewear and the radius of curled up chip was analysed. The Δζ which was the anglebetween helical surface of the chip and the axis of rotation of the chip was used toestablish two models. One Reflects the relation of tool nose wear and chipshape.Another one reflects the relation of tool groove wear and chip shape.At last, cutting experiments imitating the wear state of cutting tools wereperformed to study the changes of chip shapes on three different wear states, anddifferent periods’ cutting experiment were done to explore the wear states of cuttingtools after chip shapes had been altered.