Resources Contact Us Home
Resistance projection welding system and method for welding a fastener element to a workpiece

Image Number 5 for United States Patent #5808266.

A system and method is disclosed for monitoring and controlling a resistance projection welder for welding a projection weld nut to a workpiece. A displacement sensor measures the displacement of a welding electrode of a weld gun in real time during the welding procedure. A computer is coupled to the displacement sensor and determines whether the projection weld nut is correctly loaded between the workpiece and the welding electrode. The computer instructs a programmable logic controller (PLC) to trigger a weld controller to apply power to the welding electrode if the projection weld nut is correctly loaded onto the workpiece. The computer instructs the PLC to inhibit power if it determines the projection weld nut to be inverted, missing, or misaligned in order to allow for the removal and replacement of the projection weld nut. The computer further instructs the PLC to control and terminate the power to the welding electrode in real time in order to form a projection weld between the projection weld nut and the workpiece that is substantially similar to a predetermined projection weld. The computer processes the displacement data and provides a fault signal when the projection weld is unacceptable. A marker marks the unacceptable workpieces in response to the fault signal.

  Recently Added Patents
Hybrid coatings and associated methods of application
System, apparatus, and method for fast startup of USB devices
Defected ground plane inductor
Detection of bioagents using a shear horizontal surface acoustic wave biosensor
Storing a location within metadata of visual media
Method of measuring the flux of a soil gas
  Randomly Featured Patents
Process for isoparaffin olefin alkylation
Slow-release composite and process for producing the same
Calibrachoa plant named `KLECA11227`
Wide-angle optical system
Method and apparatus for demounting pneumatic vehicle tires
Overdraw arrow rest device
Locking container cap and dispenser for fuel
Rapid synchronization for communication systems
Electronic reader
Semiconductor device with increased distance between channel edges and a gate electrode