Exhaust Manifold Weld Bead Segmentation for Heat Control

The patent applies different welding strategies to different locations: the first weld bead uses continuous welding for complete coverage, while the second weld beads use discontinuous segments with gaps at critical locations. This local differentiation ensures adequate welding coverage while preventing excessive heat accumulation at the first weld bead location, thereby resolving the contradiction between welding coverage and strength degradation.

The patent applies partial action by making the second weld beads discontinuous rather than continuous. The second weld beads are divided into multiple segments with gaps between them, particularly at locations where they would overlap with the first weld bead. This partial application of welding ensures adequate coverage while preventing excessive heat accumulation, thereby resolving the contradiction between welding coverage and heat accumulation.

The patent segments the second weld beads into multiple discontinuous portions rather than applying continuous welding. This segmentation allows for better heat management and easier welding control, as each segment can be independently controlled and the gaps between segments prevent heat accumulation. The segmented approach maintains adequate welding coverage while significantly improving welding control ease.