Friday, November 1, 2013

How Hitachi Armature Coils are formed

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

Hitachi Armature Coil Forming ( W 23.007):-
Points noticed:-
  • WI needs modification since....
  • Conductor being cut was of lesser length than mentioned in WI.
Conductor
Length in WI
Actual Length found during inspection
a-b
1691 mm
1689 mm
c-d
1682 mm
1680 mm
e-f
1666 mm
1664 mm
g-h
1654 mm
1652 mm
i-j
1642 mm
1640 mm
  • Actual length being cut in shop is less than permitted tolerance in WI.
  • Bending Jig INJ-017 was being sent for calibration.
  • Clearance between jig and roller not as per para 3.2.3 of WI.
  • Stopper location 810 mm instead of 812 mm mentioned in WI para 3.2.5
  • Spacers used were not as per para 3.2.8 of WI.
  • No GO guage for measuring dia of head also “goes” through.



Hitachi Armature Coil Forming ( W 23.008):-
Points noticed:-
  • Tube KCTUN-1 was being used in place of KCTUN-CI -6 mentioned in WI.
  • KCTUN was of 3 A make. This could not be located in the CLW approved list.
  • KCTUN tube was being cut for 30 mm whereas mentioned 30mm in the WI. para 3.2.1
  • 30 T press machine for doing Step Down was being sent for calibration.

  • Jig for Step Down INJ-016 was being sent


    for calibration.

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