What technique is commonly used to minimize distortion during welding?

Stitch welding is a technique that involves making intermittent welds rather than a continuous weld, which helps reduce the amount of heat introduced into the base material. By controlling the heat input, stitch welding minimizes thermal expansion and contraction, thus reducing the potential for distortion. Tack welding, on the other hand, involves making small, temporary welds that hold parts in place prior to completing the final weld. This technique helps stabilize components, preventing them from shifting during the welding process, which can also lead to distortion.

Using both stitch and tack welding together provides a comprehensive approach to minimizing distortion. The tack welds secure the components, ensuring they remain aligned, while the stitch welds control the heat input and mitigate the risks associated with thermal deformation. Therefore, the combined effect of both techniques makes them particularly effective in preventing distortion during welding operations.