| 摘要 |
<p>A method in which a buildup welding is performed at an unbalanced position of a body of rotation such as a turbine assembly of a torque converter, whereby a balance weight (20) for correcting an unbalance of the body of rotation is provided. An inert gas (N2) atmosphere is present at the back of a portion to be welded (3) of the body of rotation, so that no oxide scale is generated at the back surface of the portion to be welded (3) during welding. Arcs are pulse-controlled and produced in different sizes, whereby a filler material (51c) is melted heavily or lightly, so that the rise of temperature at the surface of the portion to be welded is controlled. Accordingly, no strike-through due to the penetration at the portion to be welded (3) occurs, so that large quantities of buildup welding become possible. Because of TIG welding, no spatter is generated, whereby cleaning/removing work otherwise required in an after-process can be dispensed with.</p> |
