REDUCTION OF WAVE AND ROUGHNESS OF THE EDGE PREPARATIONS FROM THE ACTIVITY OF THE SPEED JET IN HYDROREASIS SYSTEMS WITH MOBILE PREPARATION
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2018, Vol 1, Issue 111
Abstract
Purpose. To determine the growth performance and to evaluate the possibility of control of the tension state of the zone water-jet cutting means pre-loading the blanks. Methodology. The computer simulation of the loading of the slab with the definition of areas of strain, with various influences (tensile force, torque and combined effect of force and torque) was conducted. Results. Hydro-cutting systems offered in the market of industrial equipment, as a rule, have a traditional layout, which provides a horizontal arrangement of the workpiece on the table, which is also a pool-trap for the flowing jet of liquid. However, when processing high-precision products that require stable quality of the ends, such systems are of little use, since periodic flow of the jet onto the table supports cause a change in the interaction conditions and lead to processing defects. It is proposed to use systems with a fixed jet head, and to make work movements due to the motion of the workpiece. However, in this case, wave phenomena in the jet are actively manifested, so a further increase in the accuracy of the contour and the quality of the end face is seen in the establishment of rational conditions for the interaction of the jet with the workpiece at variable rates of relative motion. Originality. In work the conditions of occurrence of oscillations are analyzed, regularities of formation of defects of an end are established which can be leveled by maintenance of variable speed of contour submission with corresponding damping of links of system of a drive of a workpiece. It is shown that the formation of the undulation of the butt in contour cutting occurs at the initial moment of contact of the jet with the workpiece and at the moment of changing the direction of motion of the workpiece. Practical value. A mathematical model is proposed taking into account the dynamics of the billet under the action of the hydrodynamic shock load, the dynamics of the feed drives and the phenomenon of the high-frequency influence of the abrasive particles. It is suggested to evaluate the quality of transient processes on the basis of an imitation model of hydroabrasive cutting. References 26, figures 11.
Authors and Affiliations
S. Kovalenko, V. Оrel, A. Salenko
Keywords
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- DOI 10.30929/1995-0519.2018.4.56-68
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