A new method that accounts for material loss in the normal direction has been developed. Most research applied wear length and wear area to present the status of the tool. Nevertheless, these methods cannot detect the wear in the normal direction of the contact surface between tool and material, and cannot make accurate judgments in precision machining process. In the proposed model, both of the least square lines of the inspected positions and the least square planes of the examined flanks calculating by the wear depth of measuring points are used to infer the relative wear indices, such as flank wear angle, wear depth of punch top face, straightness error, area loss, and volume loss of punch flanks. By using these indices more objective estimations can be acquired than that of wear length and wear area. A series of shearing experiments of thin phosphor bronze sheet are executed to explore the effects of shearing parameters on punch flank wear, and several regressive equations are derived to express the relationships between the wear indices and number of shearing strokes.
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A New Tool Wear Examination Model by Least Square Method for Shearing Process of Thin Metal Sheet
Zone-Ching Lin, Professor,
Zone-Ching Lin, Professor
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
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Dar-Yuan Chang, Assistant Professor
Dar-Yuan Chang, Assistant Professor
Department of Mechanical Engineering, De Lin Institute of Technology, Tucheng, Taipei Hsien, Taiwan, R.O.C.
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Zone-Ching Lin, Professor
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
Dar-Yuan Chang, Assistant Professor
Department of Mechanical Engineering, De Lin Institute of Technology, Tucheng, Taipei Hsien, Taiwan, R.O.C.
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received Aug. 2003. Associate Editor: A. J. Shih.
J. Manuf. Sci. Eng. May 2004, 126(2): 395-404 (10 pages)
Published Online: July 8, 2004
Article history
Received:
August 1, 2003
Online:
July 8, 2004
Citation
Lin , Z., and Chang , D. (July 8, 2004). "A New Tool Wear Examination Model by Least Square Method for Shearing Process of Thin Metal Sheet ." ASME. J. Manuf. Sci. Eng. May 2004; 126(2): 395–404. https://doi.org/10.1115/1.1644551
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