Hitachi Commutator Manufacturing

Audit of TM Shop #23 Work Instructions was started. Following WIs were audited :-

Stacking of Hitachi Commutator ( W23.027):-

Points noticed:-

• Triclorothylene solvent which is used to clean copper segments was checked for expiry date ( Mfd in 2008).

• 
  Jigs INJ-33 , INJ-34, INJ -106 were being sent for calibration.

• Instruction no 3.8 was not being followed ( use of the triangular block and 0.5 mm guage).

Static Pressing of Hitachi Commutator After Stacking (W23.028)
Points noticed:-

• Pressing Jig HITA/COM/6 was being sent for calibration.
• No of heating –cooling cycles and its duration (6hrs) could not be maintained as per instruction no 3.1
• 
  Alkyd varnish WI-294 was checked for expiry date.

• Production staff was made conversant with the steps to be followed in this WI.
• Gauges used for checking inner dia were sent for calibration.

Inner Dia was checked in the recently made commutator C8446 was found to be 276 mm ( within limit).