The purpose of pull testing for wire is to measure bond strength, analyze bond failure modalities, or comply with bond strength requirements.
Pull testing for wire refers to an upward force under wires and pulling the wire away from the substrate or die. The purpose of pull testing for wire is to measure bond strength, analyze bond failure modalities, or comply with bond strength requirements.
Ideal Way to Test for Electrically Bad Crimps
Crimped connections might be defective electrically or mechanically. Multiconductor testers are powerful instruments that determine qualifying electrical integrity. In addition, a crimp-pull tester may detect crimps with a mechanical defect due to insufficient pressure during the closure process. This mechanical device applies controlled physical separation pressure to the crimp to confirm that it is appropriately tight. Although crimp force monitors can detect crimp-caught insulation, missing strands, and more, they don’t directly check actual electrical integrity.
Additionally, the ideal practical way to test for electrically bad crimps is to perform a resistance check and standard continuity. Afterward, there is a connections test where signals go through the cable while you flex the connectors and apply stress to the line.
Importance of Wire Pull Tests
Performing crimped wire pull tests on terminals without utilizing the correct fixtures and methods can lead to inaccurate results. The best solution for crimped wire testing is the DFS II force gauge, and a GF-10 or ML1785 gripping attachment on a MT 150 test stand or LTCM 100. Additionally, companies within the appliance, automotive, and connector industries prevalently perform these tests to verify the integrity of their crimping process as part of a quality system, in production, and as a function to form new products in R&D.
Double crimp testing using the ML1785 Grip
Moreover, the ML1785 grip is the best solution to test double-crimped assemblies. They are sold separately and will adapt to both test stands utilizing thread adaptors such as 17057 Coupling, NC000296 Adaptor, 17056 Coupling, etc. Make sure to also determine the correct adaptors depending on the capacity and tester chosen. Also, this grip design allows the testing of versatile crimped wire assemblies from 0.06 to 0.21 inches in diameter.
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