Welding process of rear axle casing for truck

摘要

PURPOSE: A welding method of a rear axle casing of a truck is provided to prolong the life span of the rear axle casing by carrying out welding between the rear axle casing and a hub of the truck in such a manner that a welded portion has a rectangular cross-sectional shape and a bead portion has an increased percentage of weld penetration. CONSTITUTION: A boundary portion between a rear axle casing(10) and a hub(20) press fitted into the rear axle casing(10) is welded. The welded portion is made rectangular in shape of its cross-section. A welded bead(30b) is made convex at its upper surface to increase the weld penetration percentage thereof. If the weld penetration percentage is increased as such, cracks are prevented from being occurred at the welded bead(30b) and the degradation of durability due to shrinkage is prevented.