| 摘要 |
FIELD: machining; operation of NC lathe in manual (adjustment) and automated modes. SUBSTANCE: components of cutting force are determined for calculation of clamping forces ((P<SB>z</SB>)) of parts and permissible sagging ((P<SB>y</SB>)) of parts in finish and semi-finish turning. For determination of cutting force components, short-duration test pass by cutting tool is performed to measure thermo emf. Thermo emf thus found is used for determination of correction for physical- mechanical properties of contacting pair and geometry of tool. Cutting force components P<SB>z</SB>, P<SB>y</SB> and P<SB>x</SB> are determined on basis of found thermo emf and working parameters of cutting process (t, S, V) by the following formulae: P<SB>z</SB>= (A<SB>z</SB>+K<SB>z</SB>E)t<SP>1</SP>S<SP>0,75</SP>V , kgf; P<SB>y</SB>= (A<SB>y</SB>+K<SB>y</SB>E)t<SP>0,9</SP>S<SP>0,6</SP>V , kgf and P<SB>x</SB>= (A<SB>x</SB>+K<SB>x</SB>E)t<SP>1</SP>S<SP>0,5</SP>V , kgf. Method enhances accuracy of determination of cutting force components by automated (programmed) way due to taking into account variations of physico-mechanical properties of steels to be machined, their hardened state in the course of cutting and thermophysical properties of cemented-carbide tools both in Grades of solid alloy and inside Grade composition. EFFECT: enhanced accuracy of determination of cutting force components. 15 tbla
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