Expansion of technological possibilities for vibration-centrifugal machining of details

Abstract

Проведено дослідження взаємодії гранул абразивного середовища з оброблювальною поверхнею в процесі вібраційно-відцентрового оброблення. Технологічний процес оброблення деталей машин вільними абразивами здійснюється в якості зачисного, шліфувального і зміцнювального оброблення деталей складної конфігурації і малої жорсткості має важливе народногосподарське значення. Виявлено закономірності зміни мікрогеометрії і фізико-механічних властивостей поверхневого шару оброблювальної поверхні, проведено експериментальні дослідження у вібраційно-відцентровій установці з робочою камерою в карданному підвісі, кінематика якої забезпечує складні кутові коливання поверхневих точок робочої камери, що відповідає одному із найінтенсивніших видів вібраційного оброблення в сипучому абразивному середовищі.Vibration processing of details in concrete abrasive environment is commonly used during the final processing which is accompanied by a great number of micro impacts of inter abrasive granules as well as the surface being processed. The technological processes of grinding, polishing and strengthening processing of details are defined by the nature of changing the roughness and physical and mechanical properties of surface layer as well as its strengthening. This phenomenon is defined by the complexity and intensity of movement of working environment and its characteristics. The technological process of vibration processing can be improved with the use of new highly efficient process of centrifugal processing in concrete environment of special cells with additional movements. This process provides the increasing of quality and efficiency of technological process while processing the surfaces of different geometrical complexity. The improvement of intensity and quality of processing the complex non-rigid surfaces of machine details can be reached with the help of vibration centrifugal processing by means of free abrasives in installations with rough kinematical scheme which create complex movement of working medium inside the cell. The movement of working cell can not only be spatial or planetary, it can be made along the complex spatial curve as well. The installations worked out on this basis to process the details in concrete environment with free abrasives provide the increasing of its efficiency and intensity. Thus the theme of the work is to investigate the interaction of free abrasive granules in the working environment with the surface being processed during the vibration process of details and optimization of technological process. The nature of interaction of abrasive granules with the surface being processed is set to depend not only on the power of dynamic impact and its measurements, but on the geometrical form, granularity and so on. The abrasive filler is set to be chosen depending on the nature of operations, requirements to the quality of processing, shape of measurements and properties of details being used, the value of initial roughness of surface and its characteristics. The development of fillers of abrasive concrete working environment of different geometrical form on the basis of highly molecular joints (plastics, foams, resins and so on) allows to change the size, mass, granularity of abrasive constituent fillers. On the basis of carried out research the value of power and technological parameters of technological processing of complex non-rigid details using the free abrasives during the vibration centrifugal processing is develop