Logominov V. Surface roughness formation of cylinder end milling of thin-walled elements workpieces

The object of research is deterioration of surface roughness of thin walled details in consequence of chatter appearance. The aim of this paper is to investigate the main regularities of surface roughness formation and define the ways of increasing accuracy of thin wall end milling. The method of research is modeling and experimental validation. Theoretical and practical results: Experimentally established that in case of regenerative oscillation damping efficient way and improve the quality of the surface is the use of anti-vibration chamfer on the clearance face of the tooth cutters and use down milling. In the area of high-frequency spindle effective is the use of elastic damping system by placing items in a viscoelastic medium and the use up milling. Novelty: for the first time is established that the periodic chatter of thin wall end milling have various excitation, which depend on ratio between one cutter of the mill chip-cutting time and period of part natural frequency. For the first time was obtained comprehensive formulation of thin wall milling chatter with oscillogram combination method. Further improving is obtained by simulation of surface roughness formation. This modeling based on real oscillograms of equilibrium position deflection during machining of thin walled details. The degree of implementation: the results have been implemented on the state-run enterprise "Ivchenko-Progress" (Zaporozhye) and in education ZNTU. Scope of use is machine building sector.