A Study on Improvement of Ball Screw System Positioning Error with Liquid-Cooling

다국어 초록 (Multilingual Abstract)

The demand for higher productivity and tight part tolerances requires machine tools to have faster and more accurate feed drive systems. As tried and tested technology, ball screw drive systems are still used in a majority of machine tools due to their low cost and high degree of stiffness. A high-speed ball screw drive system generates more heat and results in greater positioning error,adversely affecting the accuracy of machined parts. In this paper, we discuss the placement of a liquid-cooling system using water,coolant oil, light oil and cutting oil as coolants in a ball screw shaft to avoid thermal errors and achieve temperature equilibrium faster. In order to estimate the positioning error and thermal distribution of the ball system and effectiveness of the liquid-cooling system, all possible heat gain-loss sources were analyzed and considered calculation factors. The following paper also presents degree of positioning error improvement when a circulation liquid-cooling system and forced liquid-cooling system were employed. When comparing the predictions and the experimental results, we can see very significant cooling performance and a high degree of consistency between prediction and reality.

참고문헌 (Reference)

1 Wu, H, "Thermal error optimization modeling and real-time compensation on a CNC center" 207 : 172-179, 2008

2 Ramesh, R, "Thermal error measurement and modeling in machine tools. Part I. Influence of varying operation conditions" 43 : 391-404, 2003

3 류성기, "Thermal error forecast and performance evaluation for an air-cooling ball screw system" ELSEVIER SCI LTD 51 (51): 605-611, 201106

4 Yun, W. S., "Thermal error analysis for a CNC lathe feed drive system" 39 : 1087-1101, 1999

5 Jing Wei, "Study on Precision Grinding of Screw Rotors using CBN Wheel" 한국정밀공학회 11 (11): 651-658, 2010

6 Tian, R., "Solution for heating of ball screw and environmental engineering" 3 : 65-67, 2004

7 Harris, T. A, "Rolling bearing analysis" Wiley Sons 540-560, 1991

8 Kamalzadeh, A., "Robust compensation of elastic deformation in ball screw drives" 50 : 559-574, 2010

9 Kim, S. K, "Real-time estimation of temperature distribution in ball-screw system" 37 : 451-464, 1997

10 Bryan, J, "International status of thermal error research" 39 (39): 645-656, 1990

11 Li, H., "Integrated dynamic thermo-mechanical modeling of high speed spindles, partI: model development" 126 : 148-158, 2004

12 Ramesh, R., "Error compensation in machine tools-a review Part II: thermal error" 40 : 1257-1284, 2000

13 Verl, A., "Correlation between feed velocity and preloading in ball screw drives" 59 (59): 429-432, 2010

14 Koda, S., "Automatic compensation of thermal expansion of ball screw in machining centers" 56 (56): 154-159, 1990

15 Chen, J. S., "A study of thermally induced machine tool errors in real cutting conditions" 36 : 1401-1411, 1996

16 Liang, J. C, "A comprehensive error compensation system for correcting geometric, thermal and cutting force induced error" 13 : 708-712, 1997