Abstract
The article discusses formation aspects of micro irregularities (roughness) on a screw surface by a designed cutting tool (disk milling cutter). The cutting process is affected by various factors of a random nature: fluctuations of the removed allowance due to deviations of the surface shape of the workpiece, grain hardness, heterogeneity of the metal structure, microvibration. The amount of asperities in the machined surface depends on the cutting conditions and the geometrical parameters of the cutting tool. The question of predicting the formation of roughness is of great practical importance in the preparation of the technological process of manufacturing parts with a helical surface. To ensure the required amount of microroughness when milling the screw surface of the workpiece, a technique has been developed that allows controlling the roughness due to the discreteness of the cutting process: the main cutting edge of the tool leaves its mark in the form of roughness comb. Modelling is performed on the basis of an invariant method of profiling the cutting tool.
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