## Analysis and improvement of design diagrams and mathematical models of vibratory lapping machines

*Problem statement.* The development of energy-efficient and high-performance vibratory lapping machines demands the improvement of their design diagrams and calculation techniques. *Purpose.* The main objectives of this research consist in detailed analysis of existent design diagrams and mathematical models of vibratory lapping machines; designing the three-mass hanger-type structures of such machines providing circular oscillations of laps; derivation of differential equations describing the motion of their oscillatory systems.