Lock Bolt Formulas
Cycle Time =
Final Bolt Placement Time + Final Collar Placement Time + Final Lock Time
The Lock Bolt Install operation models three tasks:
• Bolt placement: placing the bolt before placement of the collar.
• Collar placement: placing the collar on the bolt prior to tightening.
• Collar Tightening: tightening the collar with a hand tool.
Consequently, cycle time is the sum of the following:
• Final bolt placement time: this is the time to place the bolt, including any extra time required due to vision difficulties or obstructions. See formula.
• Final collar placement time: this is the time to place the collar, including any extra time required due to vision difficulties or obstructions. See formula.
• Final Lock Time: this is the time to tighten the collar, including any extra time required due to vision difficulties or obstructions. See formula.
Final Bolt Placement Time = Bolt Placement Time + Bolt Extra Time
Final bolt placement time is the sum of the following:
• Bolt placement time: this is the time to place the bolt, in the absence of obstructions or vision difficulties. It is looked up by process name ('Lock Bolt') and task name ('Bolt Placement') in the lookup table tblMechanicalOperationTimes (3 seconds in starting point VPEs).
• Bolt extra time: this accounts for any extra time required to place the bolt due to an obstruction or vision problem. The extra time is looked up in the lookup table tblMechanicalOperationTimes by the following:
o Process name ('Lock Bolt')
o Task name ('Bolt Placement')
o Setting of the PSO Lock Bolt Obstructed Or Vision.
The extra time is 0 if the PSO setting is No obstructed access or vision problem (the default in starting point VPEs).
Final Collar Placement Time = Collar Placement Time + Collar Extra Time
Final collar placement time is the sum of the following:
• Collar placement time: this is the time to place the collar, in the absence of obstructions or vision difficulties. It is looked up by process name ('Lock Bolt') and task name ('Collar Placement') in the lookup table tblMechanicalOperationTimes (2 seconds in starting point VPEs).
• Collar extra time: this accounts for any extra time required to place the collar due to an obstruction or vision problem. The extra time is looked up in the lookup table tblMechanicalOperationTimes by the following:
o Process name ('Lock Bolt')
o Task name ('Collar Placement')
o Setting of the PSO Lock Bolt Collar and Hand Tool Obstructed or Blind.
The extra time is 0 if the PSO setting is No obstructed access or vision problem (the default in starting point VPEs).
Final Lock Time = Lock Time + Collar Extra Time
Final lock time is the sum of the following:
• Lock time: this is the time to tighten the collar, in the absence of obstructions or vision difficulties. It is specified by the machine property Lock Speed (1 second for the machines in starting point VPEs).
• Collar extra time: this accounts for any extra time required to tighten the collar due to an obstruction or vision problem. It is assumed to be the same as any extra time required to place the collar, since placing it and tightening it require access to bolt from the same direction. The extra time is looked up in the lookup table tblMechanicalOperationTimes by the following:
o Process name ('Lock Bolt')
o Task name ('Collar Placement')
o Setting of the PSO Lock Bolt Collar and Hand Tool Obstructed or Blind.
The extra time is 0 if the PSO setting is No obstructed access or vision problem (the default in starting point VPEs).