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:
Jun. 14, 2005
Filed:
Feb. 09, 2001
Werner Kaeseler, Baunatal, DE;
Horst Muller, Baunatal, DE;
Werner Kaeseler, Baunatal, DE;
Horst Muller, Baunatal, DE;
Reu-Schweisstechnik GmbH, Baunatal, DE;
Abstract
The invention relates to a control device for spot welding with a welding electrode pincer (Z), the welding electrodes (E, E) of which are connect to a welding current generator (IS) and an electric motor drive (M), with a rotary transducer (RES), the signal of which is used by a control device (MP) to control the welding electrode pincer (Z). The closed state of said pincer holds the objects for welding (B, B) together, by means of a pre-set motor current (MAI), whereupon the welding current generator (IS) is activated. The control device (MP) comprises monitoring devices (const, max), to which the rotary transducer signals (RES) and/or a motor current measured signal (I(t)) are constantly supplied. Once a quasi-constant state is recognized, following a close signal for the welding electrode pincer (Z), a corresponding first state is recorded as the closed state and the welding current generator (IS) activated. Thereafter, as soon as the exceeding of a maximum value is reported, a further closed state is recorded, the welding current generator (IS) deactivated and a holding timer unit (CTT) activated, after the expiration (end) of which the on- and off-control of the welding electrode pincers is activated again.