Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지
DOI QR코드

DOI QR Code

Dynamic Balancing in a Link Motion Punch Press

링크모션 펀치프레스의 다이나믹 발란싱

  • Suh, Jin-Sung (Department of Mechanical Engineering, Korea Polytechnic Univ.)
  • Published : 2007.05.20
Download PDF
⟨ Previous Next ⟩

Abstract

In a link motion punch press, numerous links are interconnected and each link executes a constrained motion at high speed. As a consequence, dynamic unbalance force and moment are transmitted to the main frame of the press, which results in unwanted vibration. This degrades productivity and precise stamping work of the press. This paper presents an effective method for reducing dynamic unbalance in a link motion punch press based upon kinematic and dynamic analyses. Firstly, the kinematic analysis is carried out in order to understand the fundamental characteristics of the link motion mechanism. Then design variable approach is presented in order to automate the model setup for the mechanism whenever design changes are necessary. To obtain the inertia properties of the links such as mass, mass moment of inertia, and the center of mass, 3-dimensional CAD software was utilized. Dynamic simulations were carried out for various combinations of design changes on some links having significant influences on kinematic and dynamic behavior of the mechanism.

링크모션 펀치프레스는 많은 링크들이 서로 연결되어 있으며 각각의 링크는 고속에서 구속 운동을 수행한다. 그 결과 동적 불평형 힘과 모멘트가 프레스의 메인프레임으로 전달되며 원하지 않는 진동을 수반한다. 이로 인하여 생산성과 정확한 스탬핑 작업의 저하를 초래한다. 이 논문은 기구학 및 동역학 분석에 기초하여 링크모션 펀치프레스의 다이나믹 언발란스를 저감하는 효과적인 방법을 제시한다. 그리고 디자인 변화가 필요할 때마다 메커니즘의 모델 구성을 자동화하기 위한 디자인 변수 방식을 소개한다. 질량, 질량관성모멘트, 질량중심 등의 링크들의 관성 성질을 얻기 위하여 3차원 캐드 소프트웨어를 활용하였다. 메커니즘의 기구학적, 동역학적 거동에 주요한 영향을 미치는 일부 링크들의 디자인을 변화시킬 때 얻을 수 있는 다양한 조합에 대하여 동역학 시뮬레이션을 수행하였다.

Keywords

References

  1. Berkof, R. S. and Lowen, G. G., 1969, 'A New Method for completely Force Balancing Simple Linkages', ASME Journal of Engineering for Industry, Vol. 91, No.1, series B, pp. 21-26 https://doi.org/10.1115/1.3591524
  2. Berkof, R. S. and Lowen, G. G., 1971, 'Theory of Shaking Moment Optimization of Force-balanced-4-bar Linkages', ASME Journal of Engineering for Industry, Vol. 93, No. 1, series B, pp.53-60 https://doi.org/10.1115/1.3427917
  3. Bagci, C., 1979, 'Shaking Force Balancing of Planar Linkages with Force Transmission Irregularities Using Balancing Idler Loops', Mechanism and Machine Theory, Vol. 14, No.4, pp. 267-284 https://doi.org/10.1016/0094-114X(79)90013-2
  4. Lowen, G. G., Tepper, F. R. and Berkof, R. S., 1983, 'Balancing of Linkages - An Update', Mechanism and Machine Theory, Vol. 18, No.3, pp. 213-220 https://doi.org/10.1016/0094-114X(83)90092-7
  5. Kochev, I., 1987, 'General Method for Full Force Balancing of Spatial and Planar Linkages by Internal Mass Redistribution', Mechanism and Machine Theory, Vol. 22, No.4, pp.333-341 https://doi.org/10.1016/0094-114X(87)90022-X
  6. Streit, D., and Gilmore, B., 2005, 'Perfect Spring Equilibrators for Rotatable Bodies', ASME J. Mech., Transm., Autom. Des., Journal of Mechanical Design, Vol. 111, No. 4, pp. 451-458
  7. Gosselin, C. M. and Zhang W. J., 1999, 'Static Balancing of 3-DOF Parallel Mechanism and Manipulators', Int. J. Robot. Res., Vol. 18, No.8, pp. 819-829 https://doi.org/10.1177/02783649922066583
  8. Eber-Uohoff, I., Gosselin, C. M. and Laliberte, T., 2000, 'Static Balancing of Spatial Parallel Platform Mechanisms-revisited', Journal of Mechanical Design, Vol. 122, No. 1, pp.43-51 https://doi.org/10.1115/1.533544
  9. Kobayashi, K., 2001, 'Comparison between Spring Balancer and Gravity Balancer in Inertia Force and Performance', Journal of Mechanical Design, Vol. 123, No.4, pp.549-555 https://doi.org/10.1115/1.1423315
  10. Arakelian, V. H. and Smith, M. R., 2005, 'Shanking Force and Shaking Moment Balancing of Mechanisms: A Historical Review With New Examples', Journal of Mechanical Design, Vol. 127, pp.334-339 https://doi.org/10.1115/1.1829067
  11. Ouyang, P. R. and Zhang W. J., 2005, 'Force Balancing of Robotic Mechanisms Based on Adjustment of Kinematic Parameters', Journal of Mechanical Design, Vol. 127, pp.433-440 https://doi.org/10.1115/1.1864116
  12. Kim, C., Lee. B., Kim, D. and Jung, I., 2005, 'Element Design of Balancing Shaft for Reducing the Vibration in Engine Module', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 15, No. 11, pp. 1268-1275 https://doi.org/10.5050/KSNVN.2005.15.11.1268
  13. Shabana, A. A., 1998, Dynamics of Multibody Systems, 2nd edn., Cambridge University Press, United Kingdom
  14. Wasfy, P. R and Noor, A. K., 2003, 'Computational Strategies for Flexible Multibody Systems', Applied Mechanics Reviews, Vol. 56, No. 6, pp.553-613 https://doi.org/10.1115/1.1590354
  15. Vetyukov, YU., Gerstmayr J. and Irschik H., 2006, 'Modeling Spatial Motion of 3D Deformable Multibody Systems with Nonlinearities', Multibody System Dynamics, Vol. 15, No. 1, pp. 67-84 https://doi.org/10.1007/s11044-006-2363-3
  16. Alshaer, B. J., Nagarajan, H., Beheshti, H. K., Lankarani, H. M. and Shivaswamy, S., 2005, 'Dynamics of a Multibody Mechanical System with Lubricated Long Journal Bearings', Journal of Mechanical Design, Vol. 127, pp.493-498 https://doi.org/10.1115/1.1864112
  17. Flores, P., Ambrosio, J., Claro, J. C. P. and Lankarani, H. M., 2006, 'Dynamics of Multibody Systems with Spherical Clearance Joints', Journal of Computational and Nonlinear Dynamics, Vol. 1, No. 3, pp.240-247 https://doi.org/10.1115/1.2198877
  18. Kolovsky, M. Z., Evgrafov, A. N., Semenov, Yu. A. and Slousch, A.V., 2000, Advanced Theory of Mechanisms and Machines, Springer-Verlag, Berlin
  19. Shabana, A. A., 2001, Computational Dynamics, 2nd edn., John Wiley & Sons, Inc., New York
  20. Rivin, E. I., 2003, Passive Vibration Isolation, ASME Press, New York