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Title page for etd-0628106-173400


URN etd-0628106-173400 Statistics This thesis had been viewed 2273 times. Download 3509 times.
Author Chun-kai Chan
Author's Email Address No Public.
Department Mechanical Engineering
Year 2005 Semester 2
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 107
Title COMPETITIVE MULTI-OBJECTIVE OPTIMIZATION
OF TURNING PARAMETERS
Keyword
  • Tool
  • Computerized Numerical Control
  • Surface Roughness
  • Surface Roughness
  • Computerized Numerical Control
  • Tool
  • Abstract Surface roughness, tool life, and cutting force are considered as major
    objectives in the modern CNC (computerized numerical control) machining
    industry. This Study thesis is proposed to experimentally perform various
    turning operations with different cutting tools on an ECOCA-3807 CNC
    lathe under the concerns of multiple objectives. The Taguchi method is
    commenced through selection of orthogonal array for four
    machining parameters (cutting depth, feed rate, spindle speed, and tool
    runoff) with three different levels (low, medium, and high). Additionally, a
    three-parameter (back centering, coolant, and tool extension) environmental
    orthogonal array is also introduced for the deviations between
    experiment and real industry to analyze the established experiment.
    L (34 )
    9
    L (2 ) 4
    The surface roughness is primarily selected as the quality characteristic
    for the machining experiment, and the MITSUTOYO SURFTEST is utilized
    to evaluate the surface roughness of machined work pieces. Through the
    analytical practice of Taguchi method, the first set of optimum cutting
    conditions is received. Additionally, the tool life is then considered as the
    second quality characteristic, and the SONY COLOR VIDEO electronic
    microscope is applied to scale the tool wear. Therefore, the second set of
    optimum cutting conditions is derived through the analytical technique of
    Taguchi method. Moreover, the cutting force is considered as the third
    ii
    quality characteristic to be competitively challenged between the two sets of
    optimum conditions. Based on the electronics circuit developed in the
    previous Study thesis(NSC93-2212-E-237-007), the control program by
    Visual Basic 6.0 is moreover commenced for the cutting force simulation.
    The Taguchi method is employed for the competition between two sets of
    optimum conditions. The optimum cutting parameters are thus achieved
    through the proposed competition technique. Furthermore, this Study thesis
    proposes to exam the surface roughness and tool wear under the optimum
    cutting parameters on the CNC lathe, as well as the cutting force through the
    KISTLER type 9001 force sensor under the tool base.
    According to research, the feed rate factors reveal obvious influence on
    the surface roughness, the spindle speed and cutting depth factors reveal
    obvious influence on the tool wear and cutting depth and feed rate factors
    reveal obvious influence on the cutting force. By the best cuts of the
    parameter the actual cutting result confirmation. The best parameter
    combination of this competition mode can reach to the satisfied quality.
    Advisor Committee
  • Ming-Yung Wang - advisor
  • Ching-chih Tai - co-chair
  • Hong-jyi Yeh - co-chair
  • T-S Lan - co-chair
  • Files indicate access worldwide
    Date of Defense 2006-05-24 Date of Submission 2006-06-28


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