PROCESS FOR WELDING WELD NUTS TO HIGH STRENGTH STEEL

摘要

A process for projection welding a steel weld nut to an ultra high strength steel component using a direct current projection welding machine is provided. The process includes placing a steel weld nut at a predetermined location on the steel component such that the at least one projection of the weld nut is in direct contact therewith. The DC projection welding machine passes a current through the at least one projection that is in direct contact with the steel component a predetermined amount of weld time, which in turn creates a resistance weld joint between the weld nut and the steel component as is known to those skilled in the art. The predetermined amount of weld time is less than 1 Hz (16.67 sec) and the weld joint between the weld nut and the steel component has a twist off strength greater than 30.0 newton meters (Nm).

主权项

1. A process for projection welding a steel weld nut to a steel component comprising:
providing a direct current (DC) projection welding machine; providing a steel weld nut having a bottom surface, the bottom surface having at least one projection extending therefrom; providing a steel component to have the steel weld nut welded thereto; placing the steel weld nut at a predetermined location on the steel component with the at least one projection in direct contact with the steel component; applying a force to the steel weld nut in a direction towards the steel component; and passing a current through the at least one projection in direct contact with the steel component using the DC projection welding machine for a predetermined amount of weld time, the predetermined amount of weld time being less than 1 Hz and the current passing through the at least one projection producing a weld joint between the steel weld nut and the steel component, the weld joint having a twist off strength greater than 30.0 newton meters (Nm).