What is the primary effect of using abrasive wheels in welding?

Using abrasive wheels in welding primarily serves to grind away weld nuggets. This process is crucial in ensuring that welds are adequately prepared for further work, such as inspection, finishing, or applying surface treatments. By grinding down the weld nuggets, any irregularities or excessive build-up can be removed, resulting in a more uniform surface that can enhance the integrity of the weld and improve the fit of adjoining components.

This technique also plays a significant role in the quality of the final product by minimizing potential stress concentrations that may arise from uneven surfaces. The use of abrasive wheels effectively allows for better adherence of paint or other finishes by providing a well-prepared surface.

While creating a smooth finish, reducing heat distortion, and eliminating the need for filing are important aspects of body repair and finishing, they are not the primary functions of abrasive wheels in the context of welding. The grinding action specifically targets modifying the weld bead itself, which directly addresses the integrity and quality of the weld joint.