| Nelson Stud Welding, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120006801 | ARC ENERGY REGULATION IN DRAWN ARC FASTENER WELDING PROCESS - A drawn arc welding process that includes the steps of providing a work piece, providing a welding tool holding a metal object onto the work piece, providing a power supply outputting a preset current, providing an arc voltage sensing device, lifting the metal object and drawing a pilot arc current, energizing a welding current locally melting the metal object and forming a weld pool in the work piece, measuring an arc voltage, predicting the arc voltage for a remaining time of the welding process, regulating the time of the welding process wherein the measured arc voltage and predicted arc voltage are utilized to control a desired energy input set point, and plunging the fastener into the locally melted work piece forming a weld between the metal object and the work piece. | 01-12-2012 |
| 20110120205 | ONE-PIECE ELBOW HYDRAULIC FITTING DESIGNED FOR ELECTRIC ARC STUD WELDING AND PROCESS FOR PRODUCING THE SAME - A process of forming a hydraulic port weld stud that includes providing a billet of material; forging an initial forging from the single billet of material including a stud portion having a longitudinal axis and a port portion extending along an axis transverse to the longitudinal axis of the stud portion; and machining the initial forging to form a finished part wherein the port portion and stud portion are integrally formed without the need for a joining operation. | 05-26-2011 |
| 20100230389 | WAVEFORM CONTROL IN DRAWN ARC FASTENER WELDING - A drawn arc welding process that includes the steps of a) providing a welding device having a fastener, b) providing a power supply and controller linked with the welding tool, c) providing a work piece, d) energizing a main welding current in the welding tool locally melting the workpiece and forming a weld pool, e) changing the energizing current to a predetermined plunge current, and f) plunging the fastener into the locally melted workpiece at the predetermined plunge current forming a weld between the fastener and the work piece. | 09-16-2010 |
| 20100170880 | CAPACITOR CHARGE AND DISCHARGE CIRCUIT FOR FASTENER WELDING - A capacitor discharge (CD) fastener welding circuit including: an input voltage source; a rectifier bridge of diodes receiving the input voltage source; at least two capacitor charge switches linked with the rectifier bridge; at least one capacitor linked with the at least two capacitor charge switches; and at least two capacitor discharge switches linked with the capacitor and to welding output terminals. | 07-08-2010 |
| 20100154214 | TURBINE WHEEL AND SHAFT JOINING PROCESSES - A process for joining a turbine wheel and a turbine shaft of a turbocharger comprising the steps of: providing a turbine wheel; providing a turbine shaft; holding the turbine shaft in a welding device; contacting the turbine shaft to the turbine wheel; energizing a pilot current; lifting the shaft a predetermined height from the turbine wheel to draw a pilot arc; energizing a weld arc current locally melting the shaft weld end and forming a weld pool on the wheel; plunging the shaft toward the wheel into the weld pool; turning off the current; and removing the welding device from the welded shaft. | 06-24-2010 |
| 20090045173 | STUD WELDER CHUCK ASSEMBLY - A chuck assembly for a stud welding gun includes a current passing member parallel to and separated from an electrically isolated member forming a stud retaining gap. The current passing member provides a path for a welding current and includes a contact surface for releasably retaining and transmitting the welding current through a shank of a weld stud. The welding current only passes through the current passing member into the shank of the stud. | 02-19-2009 |
| 20080217911 | ONE-PIECE ELBOW HYDRAULIC FITTING DESIGNED FOR ELECTRIC ARC STUD WELDING - A hydraulic port weld stud that includes a stud portion having a longitudinal axis and a first bore formed along the longitudinal axis less than an entire length of the stud portion. A port portion extends along an axis transverse to the longitudinal axis of the stud portion. The port portion includes a second bore extending along the transverse axis and intersects the first bore of the stud portion. The port portion and stud portion are integrally formed without the need for a joining or welding operation. | 09-11-2008 |
