Application of a Newly Developed Thermally Induced Volumetric Error Compensation Model in Improving Dimensional Accuracy of Parts

Abstract:

The thermally induced volumetric error of a machine tool has been recognised as a major contributor to the dimensional and geometric errors of component parts produced by that tool. Therefore, considerable research has focused on ways to compensate for this type of error. The traditional model of compensation for the thermally induced volumetric error of a three-axis machine tool requires the measurement of 21 geometric error components and their variations with temperature, which is difficult and time-consuming to conduct. In our previous research, we developed a simplified and economical method of compensation of thermally induced volumetric error by modeling the positioning error as functions of ball-screw nut temperature and travel distance. This paper describes the application of this newly developed compensation model in improving the dimensional accuracy of parts. The model was applied to reduce the positioning error of a number of drilled holes. The results showed an average reduction of absolute and relative errors by 30.44 μm and 77%, respectively.

• Periodical: Advanced Materials Research (Volume 651)
• Pages: 530-537
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.651.530
• Online since: January 2013
• Authors: Yu Xia Lu, M.N. Islam
• Keywords: Dimensional Accuracy, Error Compensation, Positioning Error, Thermally-Induced Volumetric Error

References

[1] J. Bryan: International status of thermal error research. Annals of the CIRP, 39 (2), (1990), pp.645-656.

DOI: 10.1016/s0007-8506(07)63001-7

[2] G. Spur, E. Hoffmann, Z. Paluncic, K. Benzinger and H. Nymoen: Thermal behaviour optimisation of machine tools. Annals of the CIRP, 37 (1), (1988), pp.401-405.

DOI: 10.1016/s0007-8506(07)61664-3

[3] R. Ramesh, M.A. Mannan and A.N. Poo: Error compensation in machine tools - a review: Part II: Thermal errors. International Journal of Machine Tools and Manufacture, 40(9), (2000), pp.1257-1284.

DOI: 10.1016/s0890-6955(00)00010-9

[4] J. -H. Lee and S. -H. Yang: Statistical optimization and assessment of a thermal error model for CNC machine tools. International Journal of Machine Tools and Manufacture, 42, (2002), pp.147-155.

DOI: 10.1016/s0890-6955(01)00110-9

[5] Y. Lu and M.N. Islam: A new approach to thermally induced volumetric error compensation. International Journal of Advanced Manufacturing Technology, (2011) DOI 10. 1007/s00170-011-3849-6.

[6] Y. Lu and M.N. Islam: A simplified method for thermally induced volumetric error compensation. International Review of Mechanical Engineering (IREME), 5(5), (2011).

[7] R. Venugopal: Thermal effects on the accuracy of numerically controlled machine tools. (PhD Thesis, Purdue University, 1985).

[8] Y. Lu and M.N. Islam: Prediction and analysis of thermal effects on dimensional accuracy of machined parts. Proc. of the International Conf. on Mechanical Engineering and Mechatronics, Ottawa, Ontario, Canada, 15-17 August 2012, Paper No 31, pp.1-8.

[9] P.J. Hoffman, E.S. Hopewell, B. Janes, K.M. Shart, Jr.: Precision machining technology (Delmar Cengage Learning, USA).