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.