Patent ID: 8272122
Filing Date: 2012-09-25
Classification: B21B,B21C,C23C,Y10T

Abstract:
1. A tube mill for continuously forming a coated welded tube having at least one surface coated with a braze alloy, the tube mill comprising: means for producing a continuously moving uncoated welded tube by continuously forming and welding a tubing material; a sizing station operable to size the uncoated welded tube to form a sized uncoated welded tube having desired outer dimensions, the sizing station being located in the tube mill so as to size the uncoated welded tube before deposition of the braze alloy; means for depositing the braze alloy on a surface of the sized uncoated welded tube, the depositing means comprising at least one wire arc spray gun and at least one wire of a metallic material, the wire arc spray gun being operable to heat the metallic material and cause the metallic material to travel in a direction transverse to a direction the sized uncoated welded tube is traveling and deposit on the surface of the sized uncoated welded tube to form the coated welded tube having an adherent layer of the braze alloy; and means for removing a bow in the coated welded tube following deposition of the braze alloy as the coated welded tube travels away from the depositing means; wherein the tube mill does not have a sizing station located after the depositing means.