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.
Length in WI
Actual Length found during inspection
1691 mm
1689 mm
1682 mm
1680 mm
1666 mm
1664 mm
1654 mm
1652 mm
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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