Abstract
Experiments were conducted to determine the effects of surface texture and normal load on the stiffness of joints formed by two machined surfaces. The experiments involved deformation measurements and examination of the contact surfaces of joints subjected to normal loads. It was shown that surface-displacement results can be affected by assuming that the compressive strain in the joint specimen is the same as in an equivalent solid piece. The elastic stiffness of joints were found to increase with an increase in the maximum nominal surface pressure. Results were also shown to illustrate that the elastic stiffness of a joint is affected by the loading history. Surface-profile measurements indicated that the topography of a joint surface changed with normal load, and that the deformation of a surface profile was related to the permanent change measured by extensometers placed across the joint interface.
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Abbreviations
- x :
-
displacement across surface, and distance into profile as defined in Fig. 15
- δ:
-
extensometer deflection, in
- ∈:
-
axial strain, in./in.
- l :
-
extensometer gage length
- NSP :
-
nominal surface pressure
- CLA :
-
center-line average
- A :
-
bearing area
- F :
-
feed rate
- R :
-
tool-tip radius
References
Thornley, R. H., Connolly, R., Barash, M. M. andKoenigsberger, F., “The Effect of Surface Topography Upon the Static Stiffness of Machine Tool Joints”,Intl. Jnl. Mach. Tool Des. Res.,5 (1–2),57–73 (Sept. 1965) (1965).
Kragelsky, I. V. andDemkin, N. B., “Contact Area of Rough Surfaces”,Wear,3 (3), 170–187 (May–June 1960).
Ling, F. F., “On Asperity Distributions of Metallic Surfaces”,Jnl. Ap. Phys.29 (8),1168–1174 (Aug.1958).
Connolly, R. and Thornley, R. H., “Determining the Normal Stiffness of Joint Faces”, Jnl. Engl. Ind., ASME Paper 67- Prod 6, (1967).
Abbott, E. J. andFirestone, F. A., “Specifying Surface Quality”,Mech. Eng.,55 (9),569–572 (Sept. 1933).
Ansell, C. T. andTaylor, J., “The Surface Finishing Properties of a Carbide and Ceramic Tool”,Advances in Machine Tool Design and Research, Pergamon Press, New York, 225–243 (1963).
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Paper has been accepted for presentation at a future meeting of the SESA.
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Bellow, D.G., Nelson, D.D. On the experimental investigation of the stiffness of clamped machined surfaces. Experimental Mechanics 10, 506–513 (1970). https://doi.org/10.1007/BF02320613
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DOI: https://doi.org/10.1007/BF02320613