×

ELECTRICAL DISCHARGE MACHINING EFFICIENCY AND SAFETY MONITORING SYSTEM

  • US 3,816,692 A
  • Filed: 03/02/1972
  • Issued: 06/11/1974
  • Est. Priority Date: 03/02/1972
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for monitoring the efficiency of an electrical discharge machining operation in which pulses of electrical energy are applied to an electrode through a lead, said electrode being spaced from a work piece to form a gap between said electrode and said work piece, comprising:

  • transducer means coupled to said lead, said transducer providing an output in response to current flow through said leads;

    electrical connections connected across said gap to provide an output to enable measurement of gap voltage;

    gating means connected to said output of said transducer means, said gating means passing the output of said transducer only when an output is provided by said transducer in response to current flow through said leads;

    integrating means for integrating the output of said transducer passed by said gating means and providing an output;

    means for indicating the value of the output of said integrating means;

    a switch means for selecting either the output of said transducer means or the output of said eLectrical connections;

    a frequency meter, said frequency meter receiving a signal from said switch means, said frequency meter indicating the frequency of the pulses of electrical energy applied to said electrode when the switch means is selecting the output of said electrical connections;

    a calibration means, said calibration means receiving a signal from said switch means; and

    an indicator means, said calibration means being adjustable to cause said indicator means to read a predetermined value corresponding to 100 percent when said switch means is selecting the output of said electrical connections, said indicator means indicating the percentage of pulses of electrical energy applied to said electrode upon which conduction across said gap occurs, whereby the electrical charge measurement, the frequency indicated by said frequency meter and the percentage indicated by said indicator means may be multiplied together to obtain an indication of the efficiency of the electrical discharge machining operation.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×