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The Geometric Machining Mechanism of Ultrasonic Drilling  

Jang Sung-Hoon (삼성전자, LCD 총괄. HDD 센터)
Lee Seok-Woo (한국 생산 기술연구원)
Choi Hon-Zong (한국 생산 기술연구원)
Lee Sun-Kyu (광주과학기술원 기전공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.4, 2005 , pp. 76-83 More about this Journal
Abstract
With the acceleration of the miniaturization of products, especially in recent years, machining technologies for these products is in need of improvement. Conventional technologies have limitations in realizing the miniaturization due to the downsizing effects of the tools, which lack sufficient cutting stiffness during machining. The application of ultrasonic vibration is one of the most useful solutions in dealing with the problem. This study focused on the difference of ultrasonic drilling from conventional one in geometrical machining mechanism and the corresponding machining results. In detailed, some mathematical equations for drill cutting edge paths during drilling were extracted and new method to find uncut chip thickness from above equations was suggested. The experiments were carried out through the comparison between the results (disposed chips and internal surface states of holes) of conventional drilling and those of ultrasonic drilling. It was determined that the geometrical paths of cutting edges and analyzed uncut chip thickness agree with the appearance of disposed chips. Furthermore, the change in tool path by ultrasonic vibration resulted in the improvement of surface statement.
Keywords
stiffness; machining mechanism; uncut chip thickness;
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1 Kang, J.-P., Kim, B.-H., Song, J.-B., 'A Study on the improvement of Cutting Precision by the Ultrasonic Vibration Cutting,' KSPE, Vol. 8, No.2, pp. 69-77, 1991
2 Kim, J.-D., Kwak, Y.-K., 'A Study on Precision Machining with Ultrasonic Vibration,' KSME, Vol. 4, pp. 818 - 829, 1990
3 SASAHARA, H., HARADA, K., 'Variation of Relative Cutting Speed and Simulation of Chip Forming Process,' JSPE, pp. 578-582, 2004
4 Tomas, C., Maekawa, K., Obikawa, T. and Yamane, Y., 'Metal Machining,' Arnold, 2000
5 Wang, L.-P., Wang, L.-J., He, Y.-H. and Yang, Z.-J., 'Prediction and computer simulation of dynamic thrust and torque in vibration drilling,' Proc. Instn Mech Engrs, Vol. 212, Part B, pp. 489 - 497, 1998
6 Zhang, D.-Y., Chen, D.-C., 'Relief- face Friction in Vibration Tapping,' Int. J. Mechanical Science, Vol. 40, No. 12, pp. 1209-1222, 1998   DOI   ScienceOn
7 ？Ogawa, M., 'The present and future of Micro hole drilling,' machinery and tool, pp. 18-25, 1999-8
8 Choi, I.H., Kim, J.D., 'An Analysis of Micro-Surface Generation in Ultrasonic Vibration Cutting of Optical Plastics,' J. of KSPE, Vol. 11, No. 3, 1994
9 Lee, B.G., Choi, H.Z., Lee, S.W., 'A Study on Micro-hole machining for Ceramics $(Al_2O_3)$ Using Ultrasonic vibration,' proceeding of KSPE, pp. 988-992, 2002