Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Dynamic-Elastic Deformation Analysis for Precise Design of High Speed Press Machine

동적 탄성 변형 해석을 통한 고속프레스 정밀도 분석

  • Received : 2013.07.27
  • Accepted : 2013.11.19
  • Published : 2014.01.01
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Abstract

Enhancing the working speed and positional accuracy of high-speed press machines is essential for improving the parts accuracy and productivity. However it is known that the positional accuracy decreases and the risk of parts failure increases as the working speed of press machine increases. Therefore predicting such problems during the stage of press structure design is necessary for precise design of high-speed press machines. In the present investigation, the dynamic-elastic deformation of press drive module parts with eccentric masses was examined by finite element analysis and experiment. Then the positional accuracy and parts failure of high-speed press machines was evaluated.

제품 정밀도와 생산성 향상을 위해 고속프레스의 초고속화 및 초정밀화 기술이 더욱 중요해지고 있다. 그러나 고속프레스는 작동 속도 증가에 따라 슬라이드의 반복 위치 정밀도가 저하되고 프레스 구조 부품의 파손 위험성은 증가하는 것으로 알려져 있다. 따라서 고속프레스의 설계 정밀도를 향상시키기 위해서는 이런 문제점을 해석적으로 예측하고 설계에 미리 반영하는 것이 필요하다. 이번 연구에서는 편심 질량을 갖는 프레스 구동부 부품의 회전에 따른 동적 탄성 변형을 유한요소해석과 실험을 통해 분석하였다. 이를 통해 고속의 작동 조건에서 프레스의 정밀도와 파손 위험성 변화를 평가하였다.

Keywords

References

  1. Breitling, J., Wallace, D. and Altan, T., 1996, "Investigation of Different Loading Conditions in a High Speed Mechanical Press," Journal of Materials Processing Technology, Vol. 59, pp. 18-23. https://doi.org/10.1016/0924-0136(96)02282-0
  2. Yang, Z. and Sadler, J. P., 2000, "On Issues of Elastic-Rigid Coupling in Finite Element Modeling of High-Speed Machines," 2000, Mechanism and Machine Theory, Vol. 35, pp. 71-82. https://doi.org/10.1016/S0094-114X(98)00083-4
  3. Koo, H. W., Choi, H. J. and Hwang, B. B., 2006, "Mechanical Press Drive with Enhanced Downward Velocity Characteristics," Proceedings of the KSTP 2006 Spring Annual Meeting, pp. 110-120.
  4. Oh, S. I., 2000, "Micro Forming Technology for Ultra Thin Metal Foil," Journal of the KSME, Vol. 46, No. 6, pp. 50-56.
  5. Lee, J. K., Jeon, S. Y., Hahm, J. H. and Kim, K. H., 2001, "Design of a High Precision Press with Vertical Hydrostatic Bearings," Proceedings of the KSME 2001 Spring Annual Meeting, pp. 769-773.
  6. Lee, H. J. and Lee, N. K., 2007, "Research on the Modulating of the Desktop Micro Forming System to Micro Factory," Proceedings of the KSMTE 2007 Fall Annual Meeting, pp. 13-18.
  7. Kang, J. J., Kim, J. E., Hong, S. K., Kim. J. D., Heo, Y. M. and Cho, C., 2008, "Numerical Analysis on the High Speed Precision Press for Ultra-thin Sheet Metal Forming," Transactions of Materials Processing, Vol. 17, No. 8, pp. 643-648. https://doi.org/10.5228/KSPP.2008.17.8.643
  8. Seo, J. H., Jung, I. H., Park, T. W., Sugiyama, H., Shabana, A. A., 2005, "The Development of a Sliding Joint for Very Flexible Multibody Dynamics," Trans. Korean Soc. Mech. Eng. A, Vol. 29, No. 8, pp. 1123-1131. https://doi.org/10.3795/KSME-A.2005.29.8.1123
  9. Greco, M. and Coda, H. B., 2006, "Positional FEM Formulation for Flexible Multi-Body Dynamic Analysis," Journal of Sound and Vibration, Vol. 290, pp. 1141-1174. https://doi.org/10.1016/j.jsv.2005.05.018
  10. Yu, Y. Q. and Jiang, B., 2007, "Analytical and Experimental Study on the Dynamic Balancing of Flexible Mechanisms," Mechanism and Machine Theory, Vol. 42, pp. 626-635. https://doi.org/10.1016/j.mechmachtheory.2004.09.002
  11. Erkaya, S., Su, S. and Uzmay, I., 2007, "Dynamic Analysis of a Slide-Crank Mechanism with Eccentric Connector and Planetary Gears," Mechanism and Machine Theory, Vol. 42, pp. 393-408. https://doi.org/10.1016/j.mechmachtheory.2006.04.011
  12. Son, C. S., Cheon, H. J., Seong, H. G. and Yoon, K. S., 2011, "A Study on the Dynamic Stress Analysis of an Engine Block Using Flexible-Body Dynamic Analysis," Journal of the KSPE, Vol. 28, No. 7, pp. 805-813.
  13. Hwang, W. G., Sung, W. S. and Ahn, K. W., 2011, "Dynamic Analysis of Engine Valve Train with Flexible Multibody Model Considering Contact between Components," Transaction of KSAE, Vol. 19, No. 1, pp. 125-132.
  14. Shin, J. H., Kim, H. K., Song, M. J., Jung, C. J. and Cho, C. D., 2011, "Dynamic Analysis of a High Speed Precision Press By Using a Flexible Crank Shaft Model," Proceedings of the KSPE 2011 Spring Annual Meeting, pp. 563-564.