STUDY OF THE MOTION DYNAMICS OF THE CUTTING TOOL OF THE AUTOMATED DEVICE FOR BRICK BLANKS FORMATION

Abstract

The given research considers the main problems of brick production development, identified the most cost-effective method of brick production, provided a scheme of step-by-step formation of bricks by plastic method and determined the stage at which the modernization of the equipment for brick production should be made. Main operational and quality characteristics of building bricks are clarified. The urgency of improving the technological equipment for the formation of brick blanks is substantiated. The construction and principle of operation of some domestic automatic devices for cutting clay bar into brick blanks are analyzed, their main advantages and disadvantages are determined. The variant of improving the element of the production line of brick formation by replacing the mechanical structure by the automated device, built on the principle of mechatronic system is proposed. The hydraulic circuit of the automated device for the formation of brick blanks is composed. Mathematical model of the motion dynamics of the cutting tool of this device is developed, the model is represented by a system of differential equation, containing the equation of balance of forces and flows. Simulation study of the motion dynamics of the main actuator of the automated device for bricks formation in the environment MATLAB Simulink is carried out, as a result, the dependences of acceleration, speed and coordinate of the cutting tool motion, as well as the pressure in the pumping station on time were obtained. In addition, the dependence of the movement of the cutting tool on the time during the change of the cutting tool mass and change of the technological load force was determined. In the course of the research, the time of reaching the clay bar by the cutting tool and the time of its complete displacement were determined, and the value of the pressure in the pumping station was recorded. The dependences of the influence of the most important factors on the motion dynamics of the cutting tool of the device for raw brick blanks formation were also determined. Such factors were: reduced mass (in general inertia) of the moving parts of the cutting tool; technological load; the friction force that occurs during the movement of the cutting tools of the device.