GB1323962A - Buttwelding a tubular metal member to other metal members - Google Patents

Abstract

1323962 Welding by pressure; upsetting NIPPONDENSO KK 19 April 1971 [25 March 1970] 21795/71 Addition to 1267181 Headings B3H and B3R In butt welding a tubular metal member 10, Fig. 5, to first and second metal members 40, 30 a flange 11 is formed on the periphery of the tubular member between its ends, a first opening 41 and a first recess 42 are formed in the first member, a second opening 31 is formed in the second member, the tubular member and the other members are assembled so that one end of the tubular member is inserted into the recess and the first opening and the other end of the tubular member is inserted into the second opening until end faces of the flange are brought into contact with the bottom of the recess and a surface of the second member and an electric current is caused to flow through the members while under pressure to cause the re ess to be substantially filled with at least part of the flange to weld the members together. A tube is pressed in recessed forming members 21, 22, Fig. 2, to form a radially outwardly deformation in the form of a flange 11 and a pressure vessel 30 is prvoided with an opening 31 to receive the tube. Another member 40 is provided with an opening 41 and a recess 42 and the flanged tube is engaged in the opening 41 with the flange in the recess 42 and the assembly is moved towards the vessel 30 until the flange is sandwiched between the members 30 and 40. An electrode 50 is engaged over the tube and urged against the vessel 30 and current is passed to resistance weld the assembly together. The member 30 may be recessed additionally or alternatively.