Chip segmentation is one of the major factors of process quality assurance while deep hole drilling. The reliable chip segmentation can be obtained if a special self-vibratory drilling head is applied. The required self-excited vibrations are maintained due to the regenerative cutting mechanism and the embedded special elastic element which provides sufficient axial flexibility. The algorithm of adaptive control with vibration velocity feedback is proposed for a self-excited vibrations maintenance. The feedback gain is adjusted by cutting continuity index in order to provide the required cutting conditions. The mathematical model of vibratory drilling process dynamics with control is presented in the paper. The results of a multi-variant simulation are also presented and analyzed.
|Number of pages||13|
|Journal||Journal of Vibroengineering|
|Publication status||Published - 1 Jan 2015|
- Chip segmentation
- Regenerative effect
- Vibratory drilling