• Title/Summary/Keyword: 초음파 연삭

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A Study on a Ultrasonic Vibration Assisted Grinding of Alumina Ceramic with Diamond Grinding Tool (초음파 진동을 하는 다이아몬드 연삭공구의 알루미나 세라믹 연삭 가공에 관한 연구)

  • Choi, Young-Jae;Song, Ki-Hyeong;Park, Kyung-Hee;Hong, Yun-Hyuck;Kim, Kyeong-Tae;Lee, Seok-Woo;Choi, Hon-Zong
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.1
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    • pp.13-19
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    • 2012

  • In this study, ultrasonic vibration tool designed and made by using FEM analysis. And machining test was carried out in various machining conditions using ultrasonic vibration capable CNC machine. For work material, alumina ceramic ($Al_2O_3$) was used while for tool material diamond electroplated grinding wheel was used. To evaluate ultrasonic vibration effect, grinding test was performed with and without ultrasonic vibration in same machining condition. In ultrasonic mode, ultrasonic vibration of 20kHz was generated by HSK 63 ultrasonic actuator. The two grinding speeds, 1.67m/s and 3.35m/s, were applied. On the other hand, grinding forces were measured by KISTLER dynamometer.

  • KSCI

원통연삭에 있어 비가공시간 단축기술

  • 김선호;박화영
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.103-107
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    • 1994

  • 본 연구에서는 원통 프런지 연삭에서 비가공시간을 줄이기 위해, 공연삭시간 단축과 드레싱 신호를 이용한 숫돌 손상상태 검출에 관한 연구를 수행하였다. 연삭기의 심압대에 설치한 AE센터와 숫돌 덮개에 설치한 초음파센서를 이용해 공연삭, 공작물과 숫돌의 근접, 접촉상태를 감시하고 이에 대응해 적절히 이송속도를 제어했다. 그리고 드리싱시 나타나는 AE 신호의 표준편차를 이용해 숫돌의 손상상태를 검출해서, 드레싱 기회에 대한 효과적인 정보를 제공합으로써 비가공 시간을 단축했다.

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Development of Ultrasonic Grinding Wheel for Hybrid Grinding System (하이브리드 연삭시스템 초음파 공구 개발)

  • Kim, Kyeong Tae;Hong, Yun Hyuck;Park, Kyung Hee;Lee, Seok Woo;Choi, Hon Zong;Choi, Young Jae
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.11
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    • pp.1121-1128
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    • 2013

  • Ultrasonic grinding system is that the ultrasonic vibration by ultrasonic actuator is applied on conventional grinding system during grinding process. The Ultrasonic vibration with a frequency of over 20kHz can reduce grinding forces and increase surface quality, material removal rate (MRR) and grinding wheel life. In addition, ultrasonic vibration assisted grinding can be used for the materials that are difficult to cut. In this paper, methodology for ultrasonic tools is studied based on finite element method, and in turn the ultrasonic tools are designed and fabricated. It is found that the ultrasonic tool can vibrate with a frequency of 20kHz and amplitude of $25{\mu}m$. In order to verify the machining performance, the grinding experiment is performed on titanium alloy. By applying ultrasonic vibration, the grinding force and temperature are reduced and MRR is increased compared with the conventional grinding.

  • https://doi.org/10.7736/KSPE.2013.30.11.1121 인용 PDF KSCI