Patent ID: 7971772
Filing Date: 2011-07-05
Classification: B23K,Y10T

Abstract:
1. A method of brazing a pipe member to a counterpart member by brazing an outer peripheral surface of a pipe end portion of the pipe member to an inner peripheral surface of the counterpart member, the method comprising: defining an engaging portion having a ring shape at an outer periphery of the pipe end portion; engaging a brazing-filler-metal-made ring comprised of brazing filler metal with the engaging portion; bringing the outer peripheral surface of the pipe end portion into abutment with the inner peripheral surface of the counterpart member to form an abutment portion, said abutment portion being comprised of an abutted contact area between said outer peripheral surface of the pipe end portion and the inner peripheral surface of the counterpart member, and clearance regions which are disposed between circumferentially adjacent portions of the pipe member and the inner peripheral surface of the counterpart member on both sides of the abutted contact area; heating and melting the brazing-filler-metal-made ring of the pipe end portion such that the brazing filler metal of the brazing-filler-metal-made ring is caused to flow circumferentially into the clearance regions of the abutment portion, thereby securing, by brazing, the pipe end portion to the counterpart member.