Friday, March 22, 2013

More on traction motors

Audit of following Work Instructions was done in TM Shop. Report is as follows:-

Dimension of Bare Mainpole and Compole Coils ( W 21.203):-
Points noticed:-
  • Dimension measuring gauges ING 001 and ING-004 going forcalibration.

Crushing and forming (Pressing) of Bare FieldCoils ( W 21.204):-
Points noticed:-

  • Pressing machine gauge for showing 100 T pressing force going for calibration.

  • Forming jigs INJ-002 and INJ-010 are going for calibration.

Reports from shed:-
Discussions were held with SrDEE/Itarsi and SrDEE/Tata regarding brake hanger bracket and MSU respectively.

Saturday, March 2, 2013

Traction Motor Manufacturing Shop

Audit of following Work Instructions was done in TM Shop. Report is as follows:-

Annealing and Pressing of Smoothing Reactor(SL-30)_ ( W 21.205):-
Points noticed:-
  • Gauge for measuring 500 degrees annealing temperature being sent for calibration.

  • Gauge for measuring 110 T pressure being sent for calibration.
Acid Pickling of Bare Field Coils_ ( W 21.206):-
Points noticed:-

  • Acid submerging should not be done for 4 hours only instead of 8 hours as prescribed in WI.

Manufacturing of Smoothing Reactor Coil_ ( W 21.207):-
Points noticed:-
  • This WI needs review/updating. 30 Turn preparation as mentioned in step 3 of this WI is not relevant anymore.

Brazing of Terminals & Connectors & Dressing & Finishing_ ( W 21.208):-
Points noticed:-
  • Though flame profile is described for brazing in this WI, same may be deleted from WI as welder does the job without flaw as per his own judgment.

  • Brazing Jigs INJ-003 , INJ-011 being sent for calibration.

  • Gauges for final checking of coil ING21.09,21.011,ING.001 and ING.004 are being sent for calibration.