Overhang length effect during micro-milling of Inconel 718 superalloy
- 24 Downloads
The accuracy of machining force relies on the accuracy of the cutting force coefficients which are determined by calibration experiments and are related to cutting tool–workpiece material couple. To this end, a mechanistic model was established to anticipate machining forces that occurred during micro-milling under different tool overhang lengths. This study assumed that the cutting force coefficients varied with the tool overhang length, and this assumption was proved by some micro-milling experiments. Force coefficients were computed by linearly fitting the experimental force data. In the current work, also wear on tool and burr formation were observed as functions of feed per tooth and overhang length. The overhang length of 15 and 20 mm significantly reduced the diameter of the micro-tool as compared to the overhang length of 10 mm. The obtained results showed that cutting forces and top burr width increased with the increasing overhang length. It was also found that the values of cutting and edge coefficients differed with the overhang length.
KeywordsMicro-milling Overhang length Tool wear Force modeling Burr
The author would like to give her sincere thanks to Professor Babur Ozcelik for providing laboratory facilities during conducting this research and her thanks to Onder Gedik for help in performing micro-milling tests. The author is also grateful to Ahmet Nazim for help in performing SEM analysis.
- 16.Schmitz TL, Smith KS (2009) Machining dynamics, frequency response to improved productivity. Springer, New YorkGoogle Scholar