METHOD OF DETERMINING ROUGHNESS PARAMETER R AT NC MILLING MACHINE IN SEMI-FINISHING AND FINISHING OF CARBON STRUCTURAL AND LOW-ALLOY STEELS BY COMPOSITE MULTI-BLADE CARBIDE TOOL AT END MILLING Russian patent published in 2014 - IPC B23C3/00 

FIELD: process engineering.

SUBSTANCE: proposed method comprises using of cutting parameters and tool geometrical parameters. To up precision of roughness determination trial cut is performed by composite multi-blade carbide tool at the part to measure thermal emf of every cutting tool tip. Mean arithmetic thermal emf of said multi-blade carbide tool is calculated. Roughness parameter R_â using the calculated mean arithmetic thermal emf, geometrical parameters of carbide tool and machined part are determined by enclosed formula.

EFFECT: higher precision of roughness determination.

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