Saturday, May 11, 2013

How best quality commutators are manufactured?

Audit of following 2 WIs was done in TM Shop. Report is as follows:-

Dynamic Balancing of Hitachi Commutataor pressing ( W 23.031)

Points noticed:- 
  • Commutator dymanic seasoning was being done at 1450 rpm against 3050 rpm prescribed in WI para 3.2 this is well known limitation and being solved.
  • Seasoning temperature should not be 190 degrees against 220 degrees mentioned in WI.
  • Guage for seasoning presuure measurement (80T) was being sent for calibration.

Assembly of Hitachi Commutator on Armature Stack ( W 23.032):-
Points noticed:-

  • Centering gauge ING-201 was being sent for calibration.

  • Pressing machine guage was being sent for calibration.

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