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Motivation
The economic machining with high cutting depths in milling and turning operations is often limited by the occurrence of self-exited vibrations. The consequences of these vibrations are reduced part quality, tool breakage and damage to the machine. Cause of regenerative chatter is the interaction of the dynamic behavior of the machine structure and the process forces. For the expansion of the range and performance and the assessment of machine tools, the dynamic machine behavior has to be considered in the development process of the machine system. Besides the consideration of the cutting process the simulation mus also include the dynamic of the control system because in addition to the cutting process and the adjustment control of the control system is essential for the complete structural dynamic behavior. Approach On one hand as part of the project VispaB the integration of cutting processes in conventional FE software systems is investigated. This affords the evaluation of different design variations of machine tools already while they are still development. On the other hand separate stability software is developed to increase the productivity of machining processes on existing machine systems. To achieve this, the cutting process is deposited as a detailed model coupled with the machine model. The analysis regarding the achievable process stability provides the parameters for a maximum economic production process. |
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