1986 Volume 4 Issue 3 Pages 615-621
In a nuclear power plant, large numbers of pipe are set in very complex and narrow space. Because welding in such places is difficult, remote control pipe welding equipment, in such all welding sequence are controlled.by mini-computer, has been developed. In this report authors investigated the monitoring equipment for TIG welding.
1) For optical system reduction contrast ratio in welding part, small monitoring equipment produced with combination of pinhole, screened filter, selective filter and lens has been developed.
2) Informations can be obtained the following phenomena from monitoring equipment. (1) arc states (2) states of molten pool, (3) bead appearance, (4) groove shape, (5) weaving width, (6) molten states of filler wire.
3) The monitoring equipment developed has been applied to welding procedure in a nuclear power plant.