Abstract
The stiffness of toolholder-spindle joint at high speeds plays an important role in the cutting efficiency and the machining accuracy. A double-locking toolholder (BTF type) is designed to improve the stiffness of joint. This paper presents a macro-micro scale hybrid method to determine the stiffness of double-locking toolholder-spindle joint at high speeds. In this method the finite element method and the three-dimensional fractal method are combined. It is assumed flat in macro-scale for the contact surfaces of joint. The finite element method is introduced to obtain the pressure distribution with the influence of centrifugal force at high speeds. In micro-scale, the contact surfaces are fractal featured and the three-dimensional fractal method is used to compute the stiffness based on the pressure. Experiments with BTF40-type toolholder are conducted to verify the efficiency of the proposed model in zero-speed case. The relationship between the stiffness and the technological parameters of the system can be derived based on the presented model. The upper limit of speed, the optimized range of each technological parameter are determined for obtaining the higher stiffness of joint. The results can provide theoretical basis for improving the cutting efficiency and the machining accuracy of high-speed machine tool.
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Abbreviations
- a :
-
real contact area of a single asperity
- al :
-
the real largest contact area of a single asperity
- A r :
-
total real contact area
- D :
-
three-dimensional fractal dimension
- D s :
-
two-dimensional fractal dimension
- E :
-
equivalent elastic modulus
- E 1, E 2 :
-
elastic modulus of two surfaces
- f :
-
normal load of a single asperity
- F :
-
total normal load of contact surface
- G :
-
fractal roughness parameter
- G':
-
equivalent shear modulus
- G 1, G 2 :
-
shear modulus of two surfaces
- H :
-
hardness of the soft material
- k :
-
coefficient related with the passion ratio
- k n :
-
normal stiffness of a single asperity
- k n :
-
total normal stiffness
- k t :
-
total tangential stiffness
- L :
-
sampling length
- M :
-
asperity overlapping number of the joint surface topography
- n :
-
frequency index
- n max :
-
upper limit of frequency index
- p :
-
normal load of a single asperity
- r :
-
radius of the real contact region of a single asperity
- R :
-
curvature radius
- t :
-
tangential load of a single asperity
- x, y :
-
planar Cartesian coordinates
- Y :
-
yield stress of the soft material
- δ:
-
normal deformation of a single asperity
- δt :
-
tangential deformation of a single asperity
- φm,n :
-
random phase
- γ:
-
dimension parameter of the spectral density
- v 1, v 2 :
-
Poisson ratio
- µ:
-
static friction coefficient
- τb :
-
shear strength of the soft material
- ψ:
-
expand coefficient
- ':
-
truncated section of a single asperity
- 1c :
-
critical parameter demarcating the elastic and elastic-plastic regimes
- 2c :
-
critical parameter demarcating the elastic-plastic and plastic regimes
- e :
-
parameter in the elastic regime
- ep :
-
parameter in the elastic-plastic regime
- p :
-
parameter in the plastic regime
References
Schmitz, T. L. and Donalson, R. R., “Predicting High-Speed Machining Dynamics by Substructure Analysis,” CIRP Annals-Manufacturing Technology, Vol. 49, No. 1, pp. 303–308, 2000.
Schmitz, T. L., Davies, M. A., and Kennedy, M. D., “Tool Point Frequency Response Prediction for High-Speed Machining by RCSA,” Journal of Manufacturing Science and Engineering, Vol. 123, No. 4, pp. 700–707, 2001.
Ahmadian, H. and Nourmohammadi, M., “Tool Point Dynamics Prediction by a Three-Component Model Utilizing Distributed Joint Interfaces,” International Journal of Machine Tools and Manufacture, Vol. 50, No. 11, pp. 998–1005, 2010.
Mayer, M. H. and Gaul, L., “Segment-to-Segment Contact Elements for Modelling Joint Interfaces in Finite Element Analysis,” Mechanical Systems and Signal Processing, Vol. 21, No. 2, pp. 724–734, 2007.
Shen, Z. Y., Zhang, J. F., and Wu, Z. J., Feng, P. F., and Xu, C., “Modeling and Experimental Study on Static Characteristic of BT Tool Holder-Spindle Interface,” Advanced Materials Research, Vols. 311–313, pp. 726–731, 2011.
Liu, X. Y., “The Identification Research and Application of High-Speed Double-Side Locking Tooholder-Spindle Joint,” M.Sc. Thesis, Department of Mechanical Engineering, Beijing University of Technology, 2012.
Qi, Z. J., “Research on Identification Method of Joint Parameters based on Finite-Difference and Residual Compensation,” M.Sc. Thesis, Department of Mechanical Engineering, Beijing University of Technology, 2013.
Tsutsumi, M., Anno, Y., and Ebata, N., “Static Characteristics of 7/ 24 Tapered Joint for Machining Center: 1st Report, Effects of Taper Size and Angle Error,” Bulletin of JSME, Vol. 26, No. 213, pp. 461–467, 1983.
Shamine, D. M. and Shin, Y. C., “Analysis of No. 50 Taper Joint Stiffness Under Axial and Radial Loading,” Journal of Manufacturing Processes, Vol. 2, No. 3, pp. 167–173, 2000.
Hanna, I. M., Agapiou, J. S., and Stephenson, D. A., “Modeling the HSK Toolholder-Spindle Interface,” Journal of Manufacturing Science and Engineering, Vol. 124, No. 3, pp. 734–744, 2002.
Zhang, S., Ai, X., and Tang, W. X., “Performance of Spindle/ Toolholder Interfaces Under High Rotary Speed,” Journal of Shandong University of Technology, Vol. 33, No. 5, pp. 473–476, 2003.
Zhang, S., Ai, X., and Zhao, J., “FEM-based Parametric Optimum Design of Spindle/Toolholder Interfaces Under High Rotational Speed,” Chinese Journal of Mechanical Engineering, Vol. 40, No. 2, pp. 83–86, 2004.
Wang, S. L., Lou, H., and Wang, Y. C., “Analysis on Torsional Rigidity Property of HSK Tooling System,” Machinery Design & Manufacture, No. 3, pp. 109–111, 2009.
Pu, H., “Reliability Analysis for Tapered Interference Joint of HSK Toolholder,” Tool Engineering, Vol. 39, No. 7, pp. 51–53, 2005.
Miao, X. and Huang, X., “A Complete Contact Model of a Fractal Rough Surface,” Wear, Vol. 309, No. 1, pp. 146–151, 2014.
Majumdar, A. and Bhushan, B., “Fractal Model of Elastic-Plastic Contact between Rough Surfaces,” Journal of Tribology, Vol. 113, No. 1, pp. 1–11, 1991.
Wang, S. and Komvopoulos, K., “A Fractal Theory of the Interfacial Temperature Distribution in the Slow Sliding Regime: Part II-Multiple Domains, Elastoplastic Contacts and Applications,” Journal of Tribology, Vol. 116, No. 4, pp. 824–832, 1994.
Wang, S. and Komvopoulos, K., “A Fractal Theory of the Interfacial Temperature Distribution in the Slow Sliding Regime: Part I-Elastic Contact And Heat Transfer Analysis,” Journal of Tribology, Vol. 116, No. 4, pp. 812–822, 1994.
Yan, W. and Komvopoulos, K., “Contact Analysis of Elastic-Plastic Fractal Surfaces,” Journal of Applied Physics, Vol. 84, No. 7, pp. 3617–3624, 1998.
Zhang, X. L., Huang, Y. M., and Wen, S. H., “Fractal Model of Contact Stiffness of Joint Surfaces,” Transactions of the Chinese Society of Agricultural Machinery, Vol. 31, No. 4, pp. 89–92, 2000.
Wen, S. H., Zhang, X. L., Wen, X. G., Wang, P. Y., and Wu, M. X., “Fractal Model of Tangential Contact Stiffness of Joint Interfaces and Its Simulation,” Transactions of the Chinese Society for Agricultural Machinery, Vol. 40, No. 12, pp. 223–227, 2009.
Zhang, X. L. and Wen, S. H., “A Fractal Model of Tangential Contact Stiffness of Joint Surfaces based on the Contact Fractal Theory,” Transactions of the Chinese Society of Agricultural Machinery, Vol. 33, No. 3, pp. 91–97, 2002.
Zhao, Y., Song, X., Cai, L., Liu, Z., and Cheng, Q., “Surface Fractal Topography-based Contact Stiffness Determination of Spindle-Toolholder Joint,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, DOI No. 10.1177/0954406215578483, 2015.
Ausloos, M. and Berman, D., “A Multivariate Weierstrass-Mandelbrot Function,” Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, Vol. 400, No. 1819, pp. 331–350, 1985.
Kogut, L. and Etsion, I., “Elastic-Plastic Contact Analysis of a Sphere and a Rigid Flat,” Journal of Applied Mechanics, Vol. 69, No. 5, pp. 657–662, 2002.
Liou, J. L., “The Theoretical Study for Microcontact Model with Variable Topography Parameters,” Ph.D. Thesis, Department of Mechanical Engineering, National Cheng Kung University, 2006.
Mandelbrot, B. B., “Self-Affine Fractals and Fractal Dimension,” Physica Scripta, Vol. 32, No. 4, pp. 257–260, 1985.
Ji, C., Zhu, H., and Jiang, W., “Fractal Prediction Model of Thermal Contact Conductance of Rough Surfaces,” Chinese Journal of Mechanical Engineering, Vol. 26, No. 1, pp. 128–136, 2013.
Zhang, X., Wang, N., Lan, G., Wen, S., and Chen, Y., “Tangential Damping and Its Dissipation Factor Models of Joint Interfaces based on Fractal Theory with Simulations,” Journal of Tribology, Vol. 136, No. 1, Paper No. 011704, 2014.
Tian, H., Zhao, C., Fang, Z., Zhu, D., Li, X., and Mao, K., “Improved Model of Tangential Stiffness for Joint Interface using Anisotropic Fractal Theory,” Transactions of the Chinese Society of Agricultural Machinery, Vol. 44, No. 3, pp. 257–266, 2013.
Rongzhu, Z. and Bangwei, C., “Numerical Method of the Power Spectral Density,” High Power Laser and Particle Beams, Vol. 12, No. 6; pp. 664–668, 2000.
Zhang, S. and Ai, X., “Finite Element Analysis of HSK Spindle/ Toolholder Interface,” Mechanical Science and Technology, Vol. 23, No. 6, pp. 631–633, 2004.
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Zhao, Y., Xu, J., Cai, L. et al. Contact stiffness determination of high-speed double- locking toolholder-spindle joint based on a macro- micro scale hybrid method. Int. J. Precis. Eng. Manuf. 17, 741–753 (2016). https://doi.org/10.1007/s12541-016-0092-y
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DOI: https://doi.org/10.1007/s12541-016-0092-y