한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제29권2호
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  • Pages.129-138
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  • 2012
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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고정밀 대형 부품가공용 복합가공기 원천기술 개발

Development of Core Technologies of Multi-tasking Machine Tools for Machining Highly Precision Large Parts

  • 투고 : 2011.12.20
  • 심사 : 2012.01.09
  • 발행 : 2012.02.01
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초록

In this study, three types of large scale multi-tasking machine tools together with core technologies involved have been developed and introduced; a multi-tasking machine tool for large scale marine engine crankshafts, a multi-tasking vertical lathe for windmill parts, and a large scale 5-axis machine tool of gantry type. Several special purpose devices has been necessarily developed for the purpose of handling and machining big and heavy workpieces accurately, such as PTD (Pin Turning Device) with revolving ring spindle for machining eccentric crankshaft pins, hydrostatic rotary table and steady rest for supporting and resting heavy workpieces, and 2-axis automatic swiveling head for high-quality free surface machining. Core technologies have been also developed and adopted on their detail design stage; 1) structural design optimization with FEM structural analysis, 2) theoretical hydrostatic analysis for the PTD and rotary table bearings, 3) box-in-box type cross-rail and octagonal ram design to secure machine rigidity and accuracy, 4) constant spindle rpm control against gravitational torque due to unbalanced workpiece.

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참고문헌

  1. An, H. S., Cho, Y. J., Choi, Y. H. and Lee, D. W., "Development of manufacturing technique of multitasking machine tools for large scale marine engine crankshaft," Proceedings of KSMTE Spring Conference, pp. 288-289, 2011.
  2. An, H. S., Cho, Y. J., Choi, Y. H. and Lee, D. W., "Development of multi-tasking machine tools for large scale marine engine crankshaft," Proceedings of KSMTE Autumn Conference, p. 190, 2011.
  3. Choi, H. B., Jo, S. G., Lee, J. H. and Shin, H. C., "Optimization of Multi-tasking Vertical Lathe for Windmill Parts," Proceedings of KSMTE Spring Conference, pp. 282-283, 2011.
  4. Kim, T. S., Hong, J. S., Yang, M. Y. and Lee, E. S., "Development of a large scale 5-axis machine tool of gantry type for multi-task machining," Proceedings of KSMTE Spring Conference, pp. 296-297, 2011.
  5. Jang, S. H., Jung, W. Y., Kwon, B. C. and Choi, Y. H., "A Study on Structural Design Optimization using TMSA in Discrete Searching Space," World Academy of Science, Engineering and Technology, Vol. 56, pp. 626-630, 2009.
  6. Sim, K. S., Jang, S. H., An, H. S. and Choi, Y. H., "High Rigidity Optimization of a Large Scale Multitasking Machine Tool by using TMSA," Proceedings of KSMTE Spring Conference, p. 15, 2010.
  7. Sim, K. S., Jang, S. H., An, H. S., Cho, Y. J. and Choi, Y. H., "A Study on the Structural Optimization Design of a Pin Turning Device," Proceedings of KSPE Spring Conference, pp. 855-856, 2010.
  8. Sim, K. S., Jang, S. H., Hwang, I. W., An, H. S. and Choi, Y. H., "Dynamic Characteristic Analysis of a High-torque Spindle System for a Heavy Duty Lathe," Proceedings of KSMTE Spring Conference, pp. 290-291, 2011.
  9. Lee, M. G., Song, K. H., Choi, H. B. and Lee, D. Y., "The Displacement Minimization of the Tool Center Point by the Crossrail Structure Improvent of the Portal Machine," Journal of Korean Society of Manufacturing Technology Engineers, Vol. 20, No. 3, pp. 310-315, 2011.
  10. Lee, M. K., Park, J. J., Lee, E. S. and Kim, N. S., "A Study on the Z axis Deflection Compensation of the Crossrail for Gantry Type Machine Tools," Journal of Korean Society of Manufacturing Technology Engineers, Vol. 20, No. 2, pp. 357-360, 2011.
  11. Lee, E. S., Lee, M. K., Park, J. B., Kim, N. S. and Park, J. J., "Analysis of Angular Motion Control Capacity for Biaxial Concurrent Control System of Gantry Type Machine," Proceedings of KSMTE Autumn Conference, p. 191, 2011.
  12. Shin, I. D., Lee, S. M., Ha, Y. H. and Lee, D. W., "The Effect of Roundness Errors of Marine Engine Bearing on the Minimum Film Thickness," Proceedings of KSTLE the 51st Autumn Conference, pp. 33-34, 2010.
  13. Ha, Y. H., Shin, I. D., Lee, S. J., Lee, S. M. and Lee, D. W., "Lubrication Analysis of a Hydrostatic Bearing for Pin Turning," Proceedings of KSMTE Spring Conference, pp. 294-295, 2011.
  14. Ha, Y. H., Lee, S. J., Lee, S. M. and Lee, D. W., "Lubrication Analysis of a Hydrostatic Bearing for Pin Turning according to Roundness Error of a Journal," Proceedings of KSMTE Autumn Conference, p. 142, 2011.
  15. Oh, J. S. and Park, C. H., "Design of Constant Flow Type Hydrostatic Bearing for Large Rotary Table," Proceedings of KSMTE Spring Conference, pp. 284-285, 2011.
  16. Oh, J. S., Park, C. H., Shim, J. Y., Choi, H. B., Shin, H. C. and Lee, J. H., "Basic Performance Evaluation of Large Hydrostatic Rotary Table," Proceedings of KSMTE Autumn Conference, p. 232, 2011.
  17. Kim, B. S., Song, C. Y. and Park, C. H., "Robust Thermal Error Modeling and Compensation for a Nano Level Thermal Drift in a High Precision Lathe," International Journal of Precision Engineering and Manufacturing, Vol. 12, No. 4, pp. 657-661, 2011. https://doi.org/10.1007/s12541-011-0085-9
  18. Jang, S. H., Sim, K. S., Lee, S. H., An, H. S. and Choi, Y. H., "Torque Control of a Lathe Spindle System with Unbalanced Workpiece," Proceedings of KSMTE Spring Conference, pp. 292-293, 2011.
  19. Guo, R., Jang, S. H., Sim, K. S. and Choi, Y. H., "Torsional Vibration Analysis of a Geared Transmission System of a Large Scale Lathe under Gravitational Unbalancing Touque," Proceedings of the IEEE International Conference on Mechatronics and Automation, pp, 1302-1307, 2010.
  20. Guo, R., Jang, S. H. and Choi, Y. H., "Torsional vibration analysis of lathe spindle system with unbalanced workpiece," Journal Central South University Technology, Vol. 18, No. 1, pp. 171-176, 2011. https://doi.org/10.1007/s11771-011-0676-8
  21. Yi, W. S., Lee, S. Y. and Lee, J. M., "Dynamic Characteristics Analysis and Chatter Prediction in High Speed CNC Lathe," Journal of the Korean Society of Precision Engineering, Vol. 16, No. 7, pp. 151-157, 1999.
  22. Shin, S. B., Lee, H. H., Kim, J. S., Kim, J. Y. and Yang, M. Y., "A Study on Chatter Stability of High Speed Spindle," Journal of the Korean Society of Machine Tool Engineers, Vol. 19, No. 3, pp. 340-345, 2010.
  23. Lee, H. H., Kim, J. S., Yang, M. Y., Kim, K. H., Park, S. G. and Youn, J. W., "A Study on Dynamic Characteristics of 2-axis Head Spindle for Five-axis Machine Tools," Proceedings of KSMTE Autumn Conference, p. 155, 2011.
  24. Shin, S. B., Lee, H. H., Kim, J. S., Lee, H. C. and Yang, M. Y., "A Study on Thermal Characteristic of Spindle Tilting Motor System," Proceedings of KSMTE Spring Conference, p. 300, 2011.
  25. Choi, Y. H., An, H. S., Choi, H. B. and Hong, J. S., "The Development of a Multi-tasking Machine Tool for Machining Highly Precision Large Parts," Proceedings of KSMTE Autumn Conference, p. 163-166, 2010.

피인용 문헌

  1. Stiffness Evaluation of a Heavy-Duty Multi-Tasking Lathe for Large Size Crankshaft Using Random Excitation Test vol.31, pp.7, 2014, https://doi.org/10.7736/KSPE.2014.31.7.627
  2. Analysis of Zig-Zag Error in Gantry Type Machine vol.39, pp.2, 2015, https://doi.org/10.3795/KSME-A.2015.39.2.157