Title page for etd-0726116-095810


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URN etd-0726116-095810
Author Hung-yi Lin
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2015
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Detection Technique for Ferrous Debris Concentration
and Viscosity in EDM Fluid
Date of Defense 2016-07-26
Page Count 80
Keyword
  • EDM fluid detecting
  • viscosity
  • Ferrography
  • Abstract The integrated apparatus for detecting ferrous debris concentration and viscosity in
    EDM fluid has been developed successfully. This apparatus contains a sampling unit,
    and measurement units of the ferrous debris concentration and viscosity with a displayer
    unit. Measurement unit of the ferrous debris concentration adopts Ferrography
    technology, where ferrous debris are captured at the gap between the poles of magnet to
    change the magnetic flux, and its concentration is measured by using the output signal
    of Hall effect sensor. Measurement unit of the viscosity uses a piston to squeeze the
    EDM fluid in a hydraulic cylinder, and a load cell is used to measure the squeeze load.
    The output signal of load cell is transformed into the viscosity of EDM fluid.
    The ferrous debris concentration is calibrated using the given concentrations, and
    the maximum error is less than 2.3 ppm under numerous tests. The viscosity is
    calibrated using the general purpose viscosity fluids, and the maximum error is less than
    5% under numerous tests. The ferrous debris concentration and viscosity in EDM fluid
    are detected using this integrated apparatus, and the effect of ferrous debris
    concentration on material removal rate and surface roughness of the machined
    workpieces is investigated. Experimental results show that this apparatus is capable of
    detecting ferrous debris concentration in EDM fluid. On the other hands, ferrous debris
    concentration in EDM fluid has an appreciable impact on the material removal rate and
    surface roughness of the machined workpieces. To maintain the performance of EDM
    machine, it is necessary to change the EDM fluid when the ferrous debris concentration
    is larger than 270 ppm. This indicates that the general EDM machine equips with a
    detecting apparatus for ferrous debris concentration in EDM fluid is important.
    Advisory Committee
  • Yeau-Ren Jeng - chair
  • Jen-Fin Lin - co-chair
  • Rong-Tsong Lee - advisor
  • Yuang-Cherng Chiou - advisor
  • Files
  • etd-0726116-095810.pdf
  • Indicate in-campus at 5 year and off-campus access at 99 year.
    Date of Submission 2016-08-30

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