Miskov V. Inertial vibropress-hammer with electrohydraulic control system of hydropulse drive for forming preforms from powder materials

Object of research - processes in inertial vibropress-hammer while shaping pieces of powder materials. The aim of this work is to create an inertial vibro hammer with electrohydraulic system of controlling hydro-impulsive drive for program management of shaping processes of pieces made of powder materials. Methods of research : mathematical modeling, vibrometrics and methods of mathematical statistics. Theoretical results: there was developed temporary mathematical model of inertial vibropress-hammer with electrohydraulic control system hydro-impulsive drive of inertial vibropress-hammer for shaping pieces made of powder materials, which is taking operating parameters of hydro-impulsive drive and electrohydraulic distributor as a vibration-exciter into account and helps to get simulation graphics approximately the same as the real vibro-table displacement graphs and pressure changes in pressure lines. There were get the dependence between the way of controlling electrohydraulic distributor as vibration-exciter of the inertial vibropress-hammer of hydro-impulsive drive, with the help of electrohydraulic control systems "by frequency" and "by pressure" and the option of "impulsive" load type; there were get the analytical dependences for determining the parameters of the electrohydraulic distributor as a vibration-exciter of the inertial vibropress-hammer hydro-impulsive drive . The practical significance of the results. There were explained the technical and technological requirements for inertial vibropress-hammer with electrohydraulic control system of hydro-impulsive drive control . There was developed an experimental stand for researching the work inertial vibropress-hammer with electrohydraulic control system hydro-impulsive drive of inertial vibropress-hammer for shaping pieces made of powder materials,there was explained the methodology of these researches. There was selected the most rational scheme of sensors and recording equipment for the implementation of experimental studies, was developed electrohydraulic control system with corresponding software that takes into account the relations between performance parameters (supply pressure and flow rate) and the executive element (amplitude and frequency of vibro-table oscillations ) and allows to manage it "by pressure" and "by frequency." There were used standard electrohydraulic distributors that provided the simplicity of hydraulic equipment with the necessary technological parameters which were set during operation. Degree of implementation: a result of disertation was implemented in the company LTD "АСК - МЕТ" (Vinnytsia). sphere (industry) the use of powder metallurgy.