ABSTRACT
Choosing rational cutting parameters and cutting stability domains is the main research goal to improve the integral impeller’s processing efficiency and quality during the machining process. However, it is very difficult to accurately predict the cutting stability region and determine the appropriate cutting parameters in a short time. Therefore, it is necessary to find a new and effective method for suppressing vibrations to extend the cutting stability region and improve the overall efficiency and precision of the integral impeller during the machining process. Magnetorheological elastomers are a kind of intelligent materials that are suitable as the damper’s vibration-absorbing components to control vibrations, because of their controllable stiffness, stable performance, faster response, good reversibility, no precipitation, no requirement sealing, etc. Thus, it will be possible to improve the impeller’s machining
1 INTRODUCTION
Engine is one of the key factors determining aircraft performance and, at the same time, is a measure of a country’s science and technological development, comprehensive national strength, and military power. If we want to improve aircraft engine’s performance, structural and technological innovation is required. This depends on its core component-integral impeller [1]. However, the integral impeller’s complex structure and the small size of the impeller’s blade cause residual stress. Thus, this usually produces vibrations (mainly flutters) and is difficult to suppress in the integral impeller machining process. These vibrations will not only make it hard to control the quality of the impeller surface and reduce the machining efficiency, but also cause potential security risks to the whole machining system. Currently, improving the impeller’s processing efficiency and quality effectively is a worldwide
efficiency and quality by using semi-active control methods and appropriate control strategies to suppress vibrations effectively during the integral impeller machining process, based on the characteristics of magnetorheological elastomers. Thus it can be seen that, it’s the primary work to design a reasonable structure and meet the requirement performance of the magnetorheological damper’s according to the characteristics of the magnetorheological elastomers and is also the important guarantee to realize effective control of vibration in the process of machining integral impeller.
