Kozlova O. Suppression of regenerative self-excited oscillations at milling of the thin-walled element of detail by end-capping cylindrical milling cutters

A research object is tooling of the thin-walled elements of details at application of end-capping milling cutters with variable geometry. Research aim - to define influence of oblique-angledness and разнонаклонности of cutting edges of end-capping cylindrical milling cutter on the level of intensity of regenerative self-excited oscillations at milling of the thin-walled element of detail. Methods are researches - experimental, conducted at milling of the thin-walled element of detail by the special cylindrical end-capping milling cutter of original construction on a measuring stand for research of vibrations. Theoretical and practical results: conformities to law of determination of zone of excitation and degeneration of regenerative self-excited oscillations are set and reasonable recommendations on application of end-capping milling cutters with разнонаклонными points and ribbon on a back surface for their suppression. Scientific novelty: first at experimental research of the eventual cylindrical milling of the thin-walled element of detail the concept of base fragment of oscillogram, as bases, is entered for the estimation of level of regenerative self-excited oscillations; got further development system of estimations of vibrations of the thin-walled element of detail for to 12 parameters of base fragment of oscillograms that fully characterize the terms of fluctuating motion at milling treatment; first on the basis of experimental researches the terms of degeneration of regenerative self-excited oscillations are certain at the cylindrical milling, that can be appraised in size qualificatory correlation of time-in-cut and period of eigentones of element; mathematical dependences are worked out for determination of time-in-cut and time of idling, and also length of active cutting edge and area of section of cut in a temporal range for the spiral tooth of end-capping cylindrical milling cutter. Degree of introduction : results is recommended for a wide industrial test on JCS "Motor Sich" and Zaporozhye Machine-Building Design Bureau Progress State Enterprise named after Academician A.G.Ivchenko and inculcated in an educational process on the Department of Technology of Engineer of ZNTU. Sphere of the use : engineer in research institutes and educational process.