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.
Problem statement. Designing and manufacturing of efficient resonant vibratory lapping machines with linear oscillations of laps demand an accurate and detailed calculation of parameters of their elastic systems and electromagnetic drives. Purpose. The main objective of this research consists in derivation of analytical dependencies for calculating the stiffness and excitation parameters of mechanical oscillatory system of vibratory finishing machine in order to ensure its resonance operation mode.
The motions of oscillation masses and unbalanced mass in the near resonances mode of behaviour of the vibratory machine with an aeroinertia drive are resulted in the article with the use of software product COSMOSMotion 2006. The analysis of the got results coordination of solid-state design with the mathematical design of the identical system in the software product of MathCAD 12 is conducted.
The findings of numerical modeling of the vibratory machine start with two unbalanced agents in the case of their synchronous and regular start are included in the article. It is shown that main advantages of the machines with self-synchronizing agents are the ability to reduce resonant amplitudes, dynamic amount of work to be done and gear capacity by using regular start of engines.
The article considers two options for accomplishment of vibro-brunt resonant systems with an impulse electromagnetic drive based on asymmetric piecewise elastic characteristics. Basic kinematic, power and energy characteristics of comparative system are presented. Relative and generalized criteria for complex (of multi-criteria) valuation of vibro-brunt system with an impulsive drive are determined.
The run-up of a vibratory machine with an debalanced drive is examined. The influence of stiff coupling installed between an electric motor and a vibration exciter is taken into consideration. Practical recommendations to limit the starting deformations and coupling oscillations are shown.
The article tackles the problem of the synthesis of the two-frequency resonance oscillations in the three-mass oscillating system. The stiffness coefficient which provides the multiple two-frequency resonance mode in the case of modernization of the two-mass resonance machines with an electromagnetic drive is defined. The influence of inertance of oscillation mass on the characteristics of working mass acceleration is determined – the maximal value and the correlation between harmonics.