[논문]회전 초음파가공 주축 개발에 관한 연구

이상평; 김민엽; 박종권; 고태조

doi:10.14775/ksmpe.2015.14.4.160

[국내논문] 회전 초음파가공 주축 개발에 관한 연구
A Study on the Development of Rotary Ultrasonic Machining Spindle 원문보기

한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, v.14 no.4, 2015년, pp.160 - 166

이상평 (영남대학교 기계공학과) , 김민엽 (영남대학교 기계공학과) , 박종권 (한국기계연구원) , 고태조 (영남대학교 기계공학과)

Abstract ▼ AI-Helper

Ultrasonic machining (USM) has been considered a new, cutting-edge technology that presents no heating or electrochemical effects, with low surface damage and small residual stresses on brittle workpieces. However, nowadays, many researchers are paying careful attention to the disadvantages of USM, such as low productivity and tool wear. On the other hand, in this study, a high-performance rotary ultrasonic drilling (RUD) spindle is designed and assembled. In this system, the core technology is the design of an ultrasonic vibration horn for the spindle using finite element analysis (FEA). The maximum spindle speed of RUM is 9,600 rpm, and the highest harmonic displacement is $5.4{\mu}m$ noted at the frequency of 40 kHz. Through various drilling experiments on glass workpieces using a CVD diamond-coated drill, the cutting force and cracking of the hole entrance and exit side in the glass have been greatly reduced by this system.

주제어

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제안 방법

The purpose of this research is to develop a high-speed rotary ultrasonic drilling (RUD) spindle and through a large number of experiments to investigate of the performance of the machine and the effect of ultrasonic vibration on crack of hole side and cutting force.

대상 데이터

Rotary ultrasonic drilling on glass experiments are conducted on this system. The experiments setup mainly consists of a RUD spindle, a CNC machine system, high frequency oscilloscope (200 MHz) and two cooling systems that are the first one is for machining process using kerosine and the second one is for the spindle using air pressure. The cutting force data is acquired by a dynamometer (Kistler, Switzerland).
1 shows the hybrid machining set-up with developed RUD spindle. The set-up consists of CNC milling (Hyper-15, hybrid precision company), transducer (4545D-40HA, durasonic company), ultrasonic generator (1.5 kHz - 100 kHz, hybrid precision company), RUD spindle, electric flushing pump, PC, spindle inverter (LS company).

이론/모형

In this study, we have developed a RUD hybrid machining system by FEA method. The maximum spindle speed, maximum amplitude of horn and resonance frequency are 9,600 rpm, 5.
Analysis properties as shown Tabel 1. The material of the horn is SM45C was used and FEA of the horn resonance frequency was performed using the modal and harmonic response method (ANSYS-Workbench).

참고문헌 (11)

Legge, P., "Ultrasonic drilling of ceramics," Ind Diam Rev, Vol. 24, No. 278, pp. 20-24, 1964.
Liu, J. W., Jin, J., Ko. T. J. and Baek. D. K., "Study of Optimal Machining Conditions of Ultrasonic Machining by Taguchi's Method," T. of KSME A, Vol. 37 No. 2, pp. 213-218, 2013.
Jahanmir, S., Ives, L. K. and Ruff, A. W., "Ceramic machining: assessment of current practice and research needs in the United States", NIST Special Publication 834, 1992.
Li, Z. C., Cai, L. W., Pei, Z. J and Treadwell C., "Edge-chipping reduction in rotary ultrasonic machining of ceramics: finite element analysis and experimental verification," Int J. Mach Tools Manuf, Vol. 46, No. 12-13, pp. 1469-1477, 2006.

상세보기
Liu, J. W., Baek, D. K. and Ko. T. J., "Chipping Minimization in Drilling Ceramic Materials with Rotary Ultrasonic Machining", Int J. Adv Manuf Technol., Vol.72, No.9-12, pp. 1527-1535, 2014.

상세보기
Zeng, W. M., "Experimental observation of tool wear in rotary ultrasonic machining of advanced ceramics," Int J. Mach Tools Manuf., Vol. 45, No. 12-13, pp. 1468-1473, 2005.

상세보기
Kadivar, M. A,. Akbari, J., Yousefi, R., Rahi, A., and Nick, M. G., "Investigating the Effects of Vibration Method on Ultrasonic-assisted Drilling of Al/SiCp Metal Matrix Composites," Robotics and Computer-Integrated Manufacturing, Vol. 30, No. 3, pp. 344-350, 2014.

상세보기
Li, C. P., Kim, M. Y., Ko, T. J. and Park, J. K., "The Effects of Ultrasonic Vibration on Surface Finish and Tool Wear in End-milling Machining," Int Conference on 3M-NANO, pp. 330-334, 2012.
Zeng, W. M. and Li, Z. C., "Experimental Observation of Tool Wear in Rotary Ultrasonic Machining of Advanced Ceramics", Int J. Mach Tools Manuf, Vol. 45, No. 12-13, pp. 1468-1473, 2005.

상세보기
Peshkovsky, S. L. and Peshkovsky, A. S., "Shock-wave Model of Acoustic Cavitation", Ultrason. Sonochem., Vol. 15, No. 4, pp. 618-628, 2008.

상세보기
"CVD diamond-coated drill," (2015) http://www.gctool.com(accessed 11, Feb., 2015)

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