Thursday, January 31, 2013

Traction motor manufacturing


Audit of following 3 Work Instructions was done in TM Shop. Report is as follows:-

Brush Holder Rocker Assembly ( W 21.303):-
Points noticed:-
  • Device for checking spring tension due for calibration planned.
  • HEW compound availability in the shop should be checked. Same should be checked for expiry date .
  • Varnish TVA1410 should be expiry date.
  • Production was held up because of non-availability of rocker ring insulator.
Motor Assembly ( W 21.304):-
Points noticed:-

  • Load test record maintained by supervisors should not have over-writings.
  • Load test mentioned in next WI should be mentioned in this WI.

Despatch work during Assembly of Hitachi Traction Motor ( W 21.305):-
Points noticed:-
  • TM name plate stands dwarf besides stator nameplate. This anomaly needs to be addressed.
  • This WI needs modification. Para 3.4.0 and para 3.5.0 ( Load test- which is already conducted) is not part of dispatch practically.
  • Para 3.6.5 and 3.6.6 of this WI should be followed.

  • TM Painting as mentioned in para 3.7.2 should be followed , instead Black-Grey PU paint application should be avoided.
  • 24 Hour Natural drying as mentioned in para 3.7.3 should be followed.

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