Srinivas Sundarram, Sriharsha (2008-08). Development of Electrochemical Micro Machining. Master's Thesis. Thesis uri icon

abstract

  • The machining of materials on micrometer and sub-micrometer scale is considered the technology of the future. The current techniques for micro manufacturing mostly are silicon based. These manufacturing techniques are not suitable for use in demanding applications like aerospace and biomedical industries. Micro electrochemical machining (?ECM) removes material while holding micron tolerances and ?ECM can machine hard metals and alloys. This study aims at developing a novel ?ECM utilizing high frequency voltage pulses and closed loop control. Stainless steel SS-316L and copper alloy CA-173 were chosen as the workpiece materials. A model was developed for material removal rate. The research studied the effect of various parameters such as voltage, frequency, pulse ON/OFF time, and delay between pulses of the stepper motor on the machined profiles. Experimental data on small drilled holes agreed with theoretical models within 10%. Micro burrs can be effectively removed by optimal ?ECM. A sacrificial layer helped to improve the hole profile since it reduced 43% of corner rounding.
  • The machining of materials on micrometer and sub-micrometer scale is

    considered the technology of the future. The current techniques for micro manufacturing

    mostly are silicon based. These manufacturing techniques are not suitable for use in

    demanding applications like aerospace and biomedical industries. Micro

    electrochemical machining (?ECM) removes material while holding micron tolerances

    and ?ECM can machine hard metals and alloys.

    This study aims at developing a novel ?ECM utilizing high frequency voltage

    pulses and closed loop control. Stainless steel SS-316L and copper alloy CA-173 were

    chosen as the workpiece materials. A model was developed for material removal rate.

    The research studied the effect of various parameters such as voltage, frequency,

    pulse ON/OFF time, and delay between pulses of the stepper motor on the machined

    profiles. Experimental data on small drilled holes agreed with theoretical models within

    10%. Micro burrs can be effectively removed by optimal ?ECM. A sacrificial layer

    helped to improve the hole profile since it reduced 43% of corner rounding.

publication date

  • August 2008