3 . Termination: the critical interface
A successful termination is a precise metallurgical event rather than a simple mechanical attachment. A correctly executed crimp creates a reliable gas-tight, cold-welded joint between the wire strands and the terminal body, preventing internal oxidation and minimizing contact resistance.
This chapter defines the physics and critical parameters of modern crimping, hand soldering, and ultrasonic terminations. It includes destructive cross-sectional analysis, pull-force testing, and the mandatory calibration and maintenance schedules for processing equipment and precision tooling.
- 3.1 Crimping fundamentals: the cold weld
Crimping is a critical process in any wire harness assembly. It is a precise metallurgical process designed to create a permanent, conductive joint. A proper crimp transforms the wire strands and the terminal barrel into a single, solid piece of meta...
- 3.2 Crimp quality assurance
The fundamental challenge with a finished crimp is that its true internal quality is concealed. To the unaided eye, a loose crimp and a perfect, gas-tight cold weld can appear identical from the outside. Therefore, quality assurance cannot rely on vi...
- 3.3 Soldered and ultrasonic terminations
While high-speed mechanical crimping is the standard for high-volume termination, manual soldering and automated ultrasonic welding remain necessary for high-reliability aerospace or high-current power applications. These processes create a solid-sta...