On tool wear and its effect on machined surface integrity

  • Qufei Xie
  • Abdel E. Bayoumi
  • L. Alden Kendall
Article

Abstract

This paper presents the results of an investigation of induced residual stress, induced strain, and induced subsurface energy in machined surfaces due to the machining process. The influence of tool wear on residual stress, strain, and energy is also reported. The exact elasticity solution for a split ring was extended and used to calculate the residual stress in the machined surface by using ring dimension changes caused by the electrochemical removal of a thin layer of residually stressed surface. The strain distribution beneath the machined surface was determined by using the grid technique. The subsurface energy stored in the machined surface was then obtained from the data of residual stress and strain. For the materials studied, this investigation showed that such energy could not be neglected when establishing the total energy needed for machining a unit volume of material.

Tool coatings having different surface roughness and tools having various magnitudes of flank wear were investigated. The experimental results show that tool wear is a dominant factor affecting the values of induced residual stress, strain, subsurface energy, and the quality of the machined surface. The increase of tool wear caused an increase of residual stress and strain beneath the machined surface. It was also found that the overall energy stored in the machined subsurface increases as the tool wear increases and as the tool surface gets rougher. When the cutting tool is severely worn, the machined surface not only becomes very rough, but also contains many partially fractured laps or cracks. This makes tool wear a key factor in controlling the quality of the machined surface.

Keywords

Residual Stress Tool Wear Machine Surface Flank Wear Surface Integrity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

Ac

cross-sectional area of the undeformed chip

Fc

cutting force

Ft

thrust force

Pst

overall specific cutting energy

Psub

subsurface energy

VB

flank wear (wear land)

°

deflection of the cut-off ring

ε

normal strain

{ie255-01}

effective strain

σ

normal stress

{ie255-02}

effective stress

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References

  1. 1.
    J.A. Bailey and S. Jeelani, “Determination of Sub-surface Plastic Strain in Machining Using an Embossed Grid,”Wear, vol. 36, p. 199, 1976.CrossRefGoogle Scholar
  2. 2.
    G. Boothroyd,Fundamentals of Metal Machining and Machine Tools, Scripta Book Company, 1975.Google Scholar
  3. 3.
    P.S. Brevey and M. Field, “Variation in Surface Stress Due to Metal Removal,”CIRP Annals, vol. 24, no. 1, p. 497, 1975.Google Scholar
  4. 4.
    C. Camatini, “A Systematic Research on the Cold Work Produced on Carbon Steel by Machining with a Lathe,”The 8th Int. M.T.D.R. Conference, 1967.Google Scholar
  5. 5.
    A.L. Christenson and R.S. Rowland, “X-ray Diffraction Measurement of Residual Stress in Hardened High-Carbon Steel,”Transaction ASM, vol. 45, p. 638, 1953.Google Scholar
  6. 6.
    A. Decneut and J. Peters, “Continuous Measurement of Residual Stress in Thin Cylindrical Piece Using Deflection Etching Techniques,”Proceedings of SME,International Conference on Surface Technology, p. 262, May 1973.Google Scholar
  7. 7.
    A.J. Durelly and V.J. Parks, “Various Forms of the Strain-Distributions Applied to Experimental Strain Analysis,”Experimental Mechanics, p. 37, February 1964.Google Scholar
  8. 8.
    M.M. Elkhabeery and J.A. Bailey, “Surface Integrity in Machining Solution-Treated and Aged 2024 Aluminum Alloy, Using Natural anc Controlled Contact Length Tools,”Journal of Engineering Materials and Technology, vol. 106, p. 152, 1984.Google Scholar
  9. 9.
    H. Ernst and M.E. Merchant, “Chip Formation and High Quality Machined Surface,”Surface Treatment of Metals, American Society of Metals, New York, vol. 29, p. 299, 1941.Google Scholar
  10. 10.
    J.M. Finney, J.Y. Mann, and R. Simpson, “The Effect of Depth of Machining Cut on the Fatigue Properties of Unnotched Aluminum Alloy Specimens,”Metallurgic, vol. 81, p. 11, 1970.Google Scholar
  11. 11.
    M. Field, J.F. Kahles, and J.T. Cammatt, “A Review of Measuring Methods for Surface Integrity,”Annals of CIRP, vol. 21, p. 219, 1972.Google Scholar
  12. 12.
    S. Jeelani and J.A. Bailey, “Residual Stress Distribution in Machining Annealed 18 Percent Nickel Maraging Steel,”Journal of Engineering Materials and Technology, vol. 108, p. 93, 1986.Google Scholar
  13. 13.
    S. Jeelani and K. Ramakrishnam, “Subsurface Plastic Deformation in Machining Annealed 18% Ni Maraging Steel,”Wear, vol. 81, p. 263, 1982.CrossRefGoogle Scholar
  14. 14.
    E.K. Henricksen, “Residual Stress in Machined Surface,”Transaction of ASME, vol. 73, p. 69, 1951.Google Scholar
  15. 15.
    S. Jeelani and K. Ramakrishnan, “Subsurface Plastic Deformation in Machining 6AI-2Sn-4Zr-2Mo Titanium Alloy,”Wear, vol. 85, p. 121, 1983.CrossRefGoogle Scholar
  16. 16.
    D. Lee, “The Nature of Chip Formationin Orthogonal Machining,”Journal of Engineering Materials and Technology, vol. 106, p. 9, 1984.CrossRefGoogle Scholar
  17. 17.
    C.R. Liu and M.M. Barash, “The Mechanical State of the Sublayer of a Surface Generated by Chip-Removal Process,”Transaction of the ASME, vol. 98, p. 1192, 1976.Google Scholar
  18. 18.
    C.R. Liu and M.M. Barash, “Variables Governing Patterns of Mechanical Residual Stress in a Machined Surface,”Transaction of the ASME, vol. 104, p. 257, 1982.Google Scholar
  19. 19.
    K. Okushima and Y. Kakino, “The Residual Stress Produced by Metal Cutting,”Annals of the CIRP, vol. 20, p. 13, 1971.Google Scholar
  20. 20.
    P.L.B. Oxley and M.G. Sterenson, “Measuring Stress/ Strain Properties at Very High Strain Rates Using a Machining Test,”Journal of Metals, vol. 95, p. 308, 1967.Google Scholar
  21. 21.
    E. Rabinowicz, “The Role of Surface Energy of Adhesion in Metalworking,”Journal of the Institute of Metals, vol. 95, p. 321, 1967.Google Scholar
  22. 22.
    A.B. Sadat and J.A. Bailey, “Residual Stresses in Turned AISI 4340 Steel,”Experimental Mechanics, vol. 27, No. 1, p. 80, 1987.CrossRefGoogle Scholar
  23. 23.
    A.B. Sadat and J.A. Bailey, “Some Observations on Surface Damage During Machining of A Bearing Bronze,”Wear, vol. 108, p. 255, 1986.CrossRefGoogle Scholar
  24. 24.
    R.F. Scruttor, “The Use of Scribed Grids for the Examination of Plastic Strain Distribution in Metal Cutting,”International Journal of Production Research, vol. 3, No. 3, p. 227, 1964.CrossRefGoogle Scholar
  25. 25.
    M.C. Shaw,Metal Cutting Principles, Clarendon Press, Oxford, 1984.Google Scholar
  26. 26.
    S. Soderberg and S. Hogmark, “Wear Mechanisms and Tool Life of High Speed Steels Related to Microstructure,”Wear, vol. 110, p. 315, 1986.CrossRefGoogle Scholar
  27. 27.
    K. Tsuchida, Y. Kawada, and S. Kodama, “A Study on the Residual Stress Distributions by Turning,”Bulletin of the JSME, vol. 18, No. 116, p. 123, 1975.Google Scholar
  28. 28.
    J.E. Williams, “Some Aspects of a Three-Zone Model of Machining,”Wear, vol. 48, p. 55, 1978.CrossRefGoogle Scholar
  29. 29.
    B. Worthington, “Surface Integrity, Cutting Force and Chip Formation When Machining with Double Rake Angle Tools,”International Journal of Machine Tool Design and Research, vol. 14, p. 279, 1974.CrossRefGoogle Scholar
  30. 30.
    S. Yonetani and S. Zaima, “On the Residual Stress in the Orthogonal Cut Surface of Aluminum,”Transaction of the Japan Institute of Metals, vol. 22, No. 3, p. 191, 1981.Google Scholar
  31. 31.
    Q. Xie, A.E. Bayoumi, L.A. Kendall, and G.L. Sheldon, “A Study on Residual Stresses and Tool Wear Induced by Machining Processes,”Proceedings North American Manufacturing Research Conference XVII, SME, May, 1989.Google Scholar

Copyright information

© Springer-Verlag New York Inc 1990

Authors and Affiliations

  • Qufei Xie
    • 1
  • Abdel E. Bayoumi
    • 1
  • L. Alden Kendall
    • 2
  1. 1.Department of Mechanical and Materials EngineeringWashington State UniversityPullman
  2. 2.Department of Mechanical Engineering-Engineering MechanicsMichigan Technological UniversityHoughton

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