ANALYSIS OF LATHE VIBRATION INFLUENCE ON BLANK ROUGHNESS

摘要

The effect of lathe vibrations to the roughness of machined surface was investigated in this article. The calculation schemes involve systems with one and two degrees of freedom representing the vibration of the blank as a rigid body hinged in the spindle and elastically supported in the tailstock of the lathe. Experimental measurements were performed on lathes of type 1K62 at different cutting speeds, feeds and depths of cut. Processing of the roughness measurements data confirmed the precision of the calculation model. Surface roughness parameters of the blank corresponded quite satisfactory to the corresponding data of the theoretical investigation. For research of influence of gyroscopic forces to the surface roughness was used a calculation model with two degrees of freedom. The results of experimental and theoretical investigations confirmed the theoretical hypothesis.