Don State Technical University Department “Machine Building" 7/6/2016

 Mechanical Engineering, Particularly in machine building stream. 7/6/2016

 Studying the effect of grinding in the working chamber to increase the intensity of the vibration treatment process. 7/6/2016

 In general, vibrational grinding is the dynamic effects of the processing medium which forms multiple collisions on the surface of particles of the workpiece.  It is the mechanical and chemical interactions among parts of the materials by acoustic shock waves. 7/6/2016

 Important technological feature of vibrational grinding is flexible medium treatment in the form of granular particles  Abrasive granules ensure uniform treatment of the entire surfaces at the same time (including complex shapes) a large number of workpieces. 7/6/2016

 Types of abrasive granules or particles of medium. 7/6/2016

 Types of abrasive granules or particles of medium. 7/6/2016

Types of abrasive granules or particles of medium. 7/6/2016

 Types of abrasive granules or particles of medium. 7/6/2016

 The process of vibrational grinding is a complex mechanical and physico-chemical phenomena.  They have a significant impact on the surface layer of the workpiece. 7/6/2016

We are using vibration techniques for the implementation of the following treatments:  Finishing;  Grinding, and strengthening operations;  In particular cleaning of castings;  Burr removal on work-pieces made of metals, plastics and rubbers; 7/6/2016

 Cleaning parts and pieces from scale and corrosion;  Deburring;  Polishing;  Surface hardening;  Washing and drying of parts;  Cleaning parts from sludge & scale etc. 7/6/2016

 The force of impact (micro-impact);  The characteristic of the manufacturing medium;  Character of the movement (trajectory) of the working chamber;  The working medium speed and acceleration; 7/6/2016

 Contact pressure;  Stress;  Temperature encountered in the area of the micro- impact;  Average temperature and pressure in the working chamber. 7/6/2016

№ Workpiece Weight of workpiece before treatment in g. Weight of workpiece after treatment in g. Metal removal in mg. Surface quality in Rz, μm Average27213 Table.1. The quantity of metal removal and the roughness parameter Rz

7/6/2016

№ Workpiece Weight of workpiece before treatment in g. Weight of workpiece after treatment in g. Metal removal in mg. Surface quality in Rz, μm. 039,4038,984208,3 139,7338,854407,9 238,7138,343707,8 3 40,4040,004009,6 439,3738, ,3 537,0736,604706,4 Average Table.2. The quantity of metal removal and the roughness parameter Rz

 The objective of the research is: to explore possibilities of increasing the intensity of vibrational grinding process through the use of special working chamber. 7/6/2016

 In accordance with the intended purpose, there are the following main tasks:  Doing research on circulation features of the motion of the particles of medium in the working chambers;  Analyze the parameters of interaction of particles, fluids and workpieces; 7/6/2016

 Research on regularities of vibration machining and surface finish;  Define the optimal shape and dimensions of workpieces after and before vibrational grinding; 7/6/2016

 Development of science-based recommendations on the selection of optimal conditions of vibrational processing in the service of the working chamber, the modernization of existing and development of new designs of vibrating tools;  Development of processes and structures of vibrating tools. 7/6/2016

 To analyze in detail the interaction among the particles of medium, fluids and workpieces and finally to get the possible working chamber design with a good production efficiency. 7/6/2016

Thank you for your attention! 7/6/2016