Stud welding with fluid shield
AssigneeUSM Corporation
InventorDonald H. Ettinger
Life of this patent
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Abstract
Method and apparatus are provided for welding studs to a work surface wherein a substantially smut free surface is produced adjacent the weld. Apparatus is provided for depositing a thin coating of liquid in spray form onto the work surface adjacent the area whereon the stud is to be welded, prior to the welding operation. Contaminates formed in suspension in the liquid during the welding operation are removed by removal of the liquid suspension which is accomplished in a simple and inexpensive manner.
Claims18
Apparatus for arc welding a metallic article such as a stud or the like to a work surface comprising:
- means for gripping said metallic article;
- means connecting the apparatus to a power source for providing a welding arc between an article disposed in said article gripping means and said work surface and means disposed on said apparatus adjacent said article gripping means for spraying a liquid in atomized form to provide a thin film of material in liquid form on the area of the work surface surrounding said article, with the article contacting the work and retained in said article gripping means whereby contaminates produced by welding are collected in suspension in the liquid.
In apparatus for arc welding a metallic article such as a stud or the like to a work surface wherein the article is retained in an article gripping device, a device for spraying a liquid material in atomized form to provide a thin film of liquid in the area of the work surface surrounding said article with said article contacting said work surface comprising structure forming a spray surface substantially at right angles with the centerline of said article retained in said gripping device, a plurality of conduits formed in said spray structure and opening at said surface, and means for providing liquid under pressure to said plurality of conduits.
A method of arc welding a metallic article such as a stud or the like to a work surface comprising the steps of:
- retaining the article at one end of an elongated gripping collet which is surrounded by a tubular flash shield having a plurality of openings provided therein;
- with the article contacting the work surface, spraying a liquid in atomized form from adjacent the opposite end of the gripping collet to flow between the collet and the flash shield with a portion thereof directed through the flash shield openings, to provide a thin film of material in liquid form in the area of the work surface surrounding the article for collection of contaminates in suspension during the welding process, sequentially thereafter providing an arc between the article and the surface to form a weld between the article and the surface while the material is in liquid form;
- and removing the film of material including the contaminates from the work surface to thereby remove contamination produced during the welding operation.
Dependencies are inferred from the claim text.