FIELD: process engineering.
SUBSTANCE: proposed method comprises processing by paper knife at different cutting speeds. Processing is carried out on selected shear section at constant time of 20-60 seconds for all cutting speeds. Then, for every cutting speed, micro hardness of blade contact zone is measured for relative micro hardness to be determined by protected formula and to plot relative micro hardness vs cutting speeds curve, and to determine optimum cutting speed from minimum relative micro hardness decrease.
EFFECT: fast and accurate determination of cutting speed.
2 dwg, 1 ex
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