DEMO — fictional range. Local brief only, NOT SENT. No personal data is collected or transmitted.
INSPECTION
The crimp is the joint, and it cannot be inspected by looking.
A crimped connection is made inside a barrel. It is checked by measuring the crimp height and by a pull test, and both are done on samples rather than on every joint.
Illustrative inspection checklist
- Crimp height
- Measured with a micrometer against the tool specification
- Pull-out force
- On a sample, against the declared table for the wire size
- Contact retention
- The contact cannot be pushed back out of the housing
- Contact position
- Fully seated, checked with the correct tool or by feel
- Plating
- Present on the contact surface and undamaged by the crimp
- Keying
- Present, undamaged and matched to the mating half
- Sealing
- Gasket present, undamaged and correctly seated
- Marking
- Batch identifier legible on the component or its packaging
An illustrative checklist for a fictional range. A real programme defines the tolerance, the sampling method, the inspection window and the remedy if a batch fails.
The four things a programme needs in writing.
The tolerance, the sampling method, the window in which inspection happens, and what happens if the batch fails. Without all four, a failed delivery becomes an argument rather than a process.
Why crimp height is the measurement.
Because it is the only thing that can be measured quickly on a production line, and it correlates with the pull-out force. A tool that is out of adjustment shows up in the height before it shows up in a failed joint.