This thesis presents the determination of the stress-deformation state of a wood lathe under demanding operating conditions. A literature review and load calculations revealed that the biggest load is caused by cutting forces, which increase rapidly with the depth of cut. By a comparative stress analysis it was confirmed that a shaft made of C35 steel can withstand the expected loads; however, further increases in the depth of cut could be critical. Simulation of shaft deflection showed that deformation is not critical for the lathe's operation. The critical rotational speed was calculated to be 4367 min⠒1, which is significantly higher than the lathe's operating speed of 1562,5 min⠒1, indicating that the machine operates in a subcritical range. The bearing life was estimated to be 11 years for bearing A and 4 years for bearing B, which meets the recommended lifespan for machine tool bearings. The main contribution of this thesis is the determination of the stress-deformation state of a wood lathe under heavy operating conditions, providing data that can be used to create guidelines for machine operation. Based on the results, recommendations for further work and improvements to the lathe are also presented.
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