Patent ID: 6253987
Filing Date: 2001-07-03
Classification: B23K,Y10T

Abstract:
A method of friction plug welding repair comprising the steps of:a) locating a defect in a weld that joins two sections of material together;b) removing weld material at the defect to form an opening, that is open ended so that a plug can be placed completely through the opening;c) placing a plug in the opening, wherein the plug has top and bottom end portions, the top end portion being tapered and larger in diameter than the opening, wherein the top end portion has two sections including a gradually tapering section and a rapidly tapering section, said rapidly tapering section defining the maximum diameter of the top end portion;d) pulling the bottom end portion of the plug so that the top end portion of the plug engages the opening; ande) rotating the plug to heat up the plug during pulling of step ""d"".