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:
Oct. 05, 2021
Filed:
Nov. 30, 2016
Böllhoff Verbindungstechnik Gmbh, Bielefeld, DE;
Torsten Draht, Schloß Holte-Stukenbrock, DE;
Stefan Rehling, Bückeburg, DE;
Böllhoff Verbindungstechnik GmbH, Bielefeld, DE;
Abstract
A method for determining the quality of a joint fabricated in a plurality of metal sheets by a joining device and a control method. The joining device comprises a drive element, and a hold-down device The method may have the following steps: moving the drive element to move the punch and, via at least one first and one second spring, the hold-down device; recording of a force applied by the drive element with a first sensor and of a distance covered by the drive element with a second sensor during a movement of the drive element in a mating direction and opposite thereto as a force/displacement curve; and comparing a linear relief range in the recorded curve with a reference curve.