The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2019
Filed:
Nov. 17, 2011
Christopher Hsu, Avon, OH (US);
Jeffrey J. Krupp, Vermilion, OH (US);
James W. Mumaw, Wadsworth, OH (US);
Christopher Hsu, Avon, OH (US);
Jeffrey J. Krupp, Vermilion, OH (US);
James W. Mumaw, Wadsworth, OH (US);
Nelson Stud Welding, Inc., Elyria, OH (US);
Abstract
In one aspect, there is disclosed a drawn arc fastener welding process that includes the steps of providing a fastener positioned in a welding tool, providing a weld control, providing a work piece, contacting the fastener against the work piece, energizing a pilot current, lifting the fastener from the work piece and drawing a pilot arc, energizing a main arc for a predetermined duration, short circuiting the fastener relative to the work piece, cyclically redrawing an arc and short circuiting the fastener relative to the work piece at least one additional cycle, dynamically sensing an arc voltage and calculating a derivative signal of the voltage over time for each drawn arc and short circuit of the cycle wherein a position and motion of the fastener relative to the work piece is controlled and the energizing of the arc is controlled, and plunging the fastener into the work piece forming a weld.