The formation of spot welds in high strength steel workpieces is improved by using welding electrodes with annular, or donut shaped welding tips for the formation of the molten metal weld pool at the weld site. The annular poll solidifies to form an annular weld nugget. Preferably the donut shaped nugget has an internal diameter that is no more than three-quarters of the outside diameter. The method is applicable to carbon steel workpieces with allowing elements for strengthening, and to thick sheets of mild carbon steels.

 
Web www.patentalert.com

< Sustained release pharmaceutical preparations and methods for producing the same

< Nucleic acid antioxidant compositions, methods for obtaining such compositions and formulations thereof

> Formation of a field reversed configuration for magnetic and electrostatic confinement of plasma

> Method and apparatus for labeling using diffraction grating-based encoded optical identification elements

~ 00298