A customer in the electronics industry contracted C&L Rivet to fabricate a delay core for one of their product lines. This unit acts as an internal time delay for stopping the flow of electricity in circuit breakers. Fabrication began with 0.0890″ diameter low carbon steel wire, which was formed and headed using our advanced 2 die 3 blow cold header. Parts were then deburred and ground to size with our specially developed tumbling process. To increase material durability and wear resistance, this part was heat treated and copper plated for enhanced conductivity and corrosion resistance. We provide copper plating in 0.000025″ – 0.00075″ thicknesses and max finish of 40 RMS.
The cold heading portion for this part called for the extremely tight tolerances of ±.0002″. Finished dimensions of the delay core were 0.4800″ – 0.5650″ long, and 0.0930″ in diameter. All manufacturing and secondary processing was completed in house at our ISO certified facility. Our products and processes are subject to rigorous quality measures, completing thorough testing and inspections throughout fabrication. This quality program includes dimensional and optical inspections, as well as Statistical Process Control (SPC).
We currently ship 500,000 delay core units per month to the customer’s locations throughout the world. For more information about this delay core project or any of our other capabilities please see the table below or contact us directly.