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TECHNICAL PAPERS

Surface Integrity of Die Material in High Speed Hard Machining, Part 2: Microhardness Variations and Residual Stresses

[+] Author and Article Information
T. I. El-Wardany, H. A. Kishawy, M. A. Elbestawi

Intelligent Machines and Manufacturing Research Centre, Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, CANADA, L8S 4L7

J. Manuf. Sci. Eng 122(4), 632-641 (Nov 01, 1999) (10 pages) doi:10.1115/1.1286557 History: Received November 01, 1997; Revised November 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Microhardness variations beneath the surface produced at different tool wear and cutting conditions (V=350 m/min). [(a) Effect of tool wear on microhardness changes (f=0.1 mm/rev,d=0.4 mm); (b) Effect of feed and depth of cut on microhardness variations (VBb=0.2 mm)].
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Finite element mesh. [(a) Mesh for the workpiece and the chip; (b) Mesh in the vicinity of cutting].
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Effect of tool wear on the tool workpiece interface. [(a) Local configuration of the tool and its interface with the workpiece; (b) Interface zone and workpiece].
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Heat generation during hard turning. [(a) Sources of heat generation; (b) Distribution of heat generated].
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Effect of thermal and mechanical loads on residual stress. [(a) Thermal load; (b) Mechanical load].
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Effect of depth of cut on residual stress distribution. [(a) Residual stress distribution at d=0.2 mm; (b) Residual stress distribution at d=0.6 mm].
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Effect of depth of cut on temperature distribution. [(a) Temperature isotherms at d=0.2 mm; (b) Temperature isotherms at d=0.6 mm].
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Effect of tool wear on distribution of residual stress. [(a) Sharp tool; (b) Worn tool].
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Lateral material flow during chip formation
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Effect of depth of cut on residual stress distrbution
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Effect of feed on measured residual stress. [(a) Effect of feed on residual stresses (worn tool) at the surface; (b) Distribution of residual stresses at low feed].
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Effect of tool wear on measured residual stress. [(a) Sharp tool; (b) Effect of tool wear on measured residual stress (at the surface)].

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