Development of a kinematic model for the prediction of the relative speed between chips and work piece in unguided vibratory finishing process

• Applicant: Professor Dr.-Ing. Thomas Bergs, since 7/2019
• Subject Area: Metal-Cutting and Abrasive Manufacturing Engineering
• Term: from 2014 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 262963126

The vibratory finishing is a manufacturing process used for machining surfaces and edges of components from the aerospace industry, the medical industry or the gearing industry. Due to its wide range of applications, vibratory finishing is widespread in the industrial production. However, there exists only a small amount of scientific work on this industrial important issue. The occurring accelerations of the abrasives and the workpieces during the process essentially influence their movement within the work bowl. The movement of the abrasives and the workpieces again influences their contact conditions (contact forces and relative velocities) and thus process output parameters like the removed material volume per unit area. The knowledge of the accelerations as well as the influence of relevant process parameters on the accelerations does not exist yet. The overall goal of this renewal proposal is an empirical kinematic model, with which the prevailing contact conditions of the abrasives and the workpiece can be explained based on the transmission behaviour of the work bowl acceleration on the acceleration of the abrasives and the workpiece as a function of the significant machine and tool input-parameters in the unguided vibratory finishing process. In a first step, the transmission behaviour of the work bowl acceleration on the acceleration of the abrasives and the workpiece is systematically investigated. Therefore, two measuring systems in the form of a sensor-integrated abrasive and a sensor-integrated workpiece are developed and constructed. In a second step, the determination and explanation of the cause-and-effect relationships between the acceleration of the abrasives and the workpiece and the prevailing contact conditions are carried out. Finally the development of the empirical kinematic model for the explanation of the prevailing contact conditions between the abrasives and the workpiece on the basis of the transmission behaviour of the work bowl acceleration on the acceleration of the abrasives and the workpiece is carried out in a third step.

• DFG Programme: Research Grants
• Co-Investigator: Dr.-Ing. Patrick Mattfeld
• Ehemaliger Antragsteller: Professor Dr.-Ing. Fritz Klocke, until 6/2019