发明名称 |
Laser welding of a sleeve within a tube |
摘要 |
A method for welding a sleeve within a tube of a steam generator, the sleeve being in close contact with the tube. A welding head of a weld head apparatus is positioned within the tube at a predetermined weld site, a laser beam is directed to the welding head, the beam is focused with a focusing means, the focused laser beam is reflected with a welding mirror means into contact with a portion of the sleeve to be welded to the tube, the welding mirror means is maintained a predetermined focal distance from the inside surface of the sleeve, and the welding head is rotated to complete a weld fusion path about the inner periphery of the sleeve. Shielding gas is used to shield the weld site. A robotic arm positions the weld head apparatus within the steam generator. At each end of the sleeve, multiple discrete weld paths or a continuous helical multiple weld path are welded. The sleeve is preferably welded to the tube along the weld path with a fusion width at the interface between the sleeve and tube of at least 0.045 inches and the tube is penetrated to a depth of at least 0.25 inches. The laser delivers 500 to 700 watts to the weld area. |
申请公布号 |
US4694136(A) |
申请公布日期 |
1987.09.15 |
申请号 |
US19860821675 |
申请日期 |
1986.01.23 |
申请人 |
WESTINGHOUSE ELECTRIC CORP. |
发明人 |
KASNER, WILLIAM H.;BRUCK, GERALD J.;MILLER, RICHARD A.;TOTH, VINCENT A. |
分类号 |
B23K26/04;B23K26/28;(IPC1-7):B23K26/00 |
主分类号 |
B23K26/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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