Meaning
Predetermined limit on physical wear or unit count determines when a manufacturing tool must be replaced and the associated process must be validated again. The tool replacement requalification threshold helps prevent product defects by mandating maintenance before tool wear begins to negatively affect the quality of assembled boards or enclosures. This parameter is used to schedule preventive maintenance on high-speed assembly equipment.
Trigger Condition
The threshold can be based on the number of cycles executed by the tool, such as the number of crimps performed by a wire terminal applicator. Once this limit is reached, the tool is replaced, and a specific testing sequence is initiated to verify that the new tool is installed correctly and functioning within tolerances. This prevents the tool from operating to the point of failure.
Validation Method
Technicians run a short test batch with the new tool and measure the critical dimensions of the output. This ensures that the process continues to meet design specifications.
Maintenance Protocol
Updating the maintenance log with the new tool’s details is necessary to reset the tracking counter in the factory’s enterprise resource planning system. This documentation is reviewed during quality audits to prove that the facility is adhering to its preventive maintenance plan. Adhering to these records prevents tool wear from compromising product quality.
