OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 7 1 5 Fig. 6. The appearance of the microscope Fig. 7. Photograph with measured wear value Ta b l e 1 Data on tool wear during processing Cutter travelled distance, m 0 202 552 840 1,375 2,010 3,061 Wear of the cutting plate, mm 0.01 0.11 0.20 0.23 0.24 0.26 0.36 Following machining on the lathe, this shaft was sectioned into smaller pieces, each representing the surface quality achieved at a specific level of tool wear (Fig. 11). These shaft sections were then used to evaluate the quality of the surface machined by tools with different degrees of wear using both the T4HD contour profile recorder and the Contour ELITE optical three-dimensional microscope.
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