TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The conventional method for starting such a weld was to drill a pilot hole to serve as the initial keyhole, carefully align the welding torch over the pilot hole, adjust the standoff distance, and then turn on the torch at full power. ... The new starting technique does not depend on precise manual alignment. The welding torch is positioned with no more than the usual care. As the torch begins to move along the weld, the welding current is gradually increased toward the full operating level, causing the depth of the weld to increase gradually until the keyhole is formed ... . The standoff is controlled by the automatic-voltage-control portion of the welding equipment. At the end of a circumferential weld, the torch can continue a short distance past the starting point to overlap and thereby complete the weld in the starting transition region.  1, record 1, English, - variable%2Dpolarity%20plasma%2Darc%20keyhole%20welding

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

Voir la fiche soudage par trou de serrure.  1, record 1, French, - soudage%20plasma%20par%20trou%20de%20serrure%20%C3%A0%20polarit%C3%A9%20variable

Record 1,  Textual support,  Spanish