Predikcija sila rezanja - eksperimentalna identifikacija parametara ortogonalnog rezanja

Abstract

U radu je prikazana procedura za određivanje skupa parametara rezanja testovima ortogonalnog struganja koji se koristi za predikciju sila i momenta rezanja. Eksperimenti su izvođeni za kombinaciju materijala obratka (Č4320) i reznog alata (Č9780). Prvi korak u predikciji sila se odnosi na razmatranje relativno jednostavnog procesa ortogonalnog rezanja, da bi se rezultati analize dalje koristili kao osnova za razvoj mnogo opštijeg slučaja kosog rezanja. Sve operacije rezanja dele iste principe mehanike rezanja, ali njihova geometrija i kinematika se razlikuju. Usvojeni linearni model sile uključuje sile usled smicanja i ivične sile. Ukupna sila se određuje na osnovu konkretne geometrije alata sumiranjem po svim aktivnim elementarnim sečivima.

In this paper the cutting coefficients were identified applying the orthogonal cutting mechanics, which are used in the cutting forces and torque prediction. The experiments were performed for material combination of the workpiece (16MnCr5) and tool (HSS-E, EMo5Co5). The first step in the forces prediction acting on a cutting tool is to consider a relatively simple orthogonal cutting process in order to continue to use the results of this analysis as a base for the development of a much more general case of oblique cutting. All cutting operations share the same cutting mechanics principles, but their geometry and kinematics are different. The accepted linear forces model includes both components, due to shearing and ploughing. The total forces are calculated based on the tool geometry by summing all active discretized cutting edges.