In rivet assembly, why is it important to ensure there are no gaps when using inspection shims?

In rivet assembly, ensuring that there are no gaps when using inspection shims is critical for guaranteeing fastening precision. When shims are used during the assembly process, they are meant to fill in any irregularities or deviations in part fit-ups. If gaps are present, the rivet may not be able to compress the materials adequately, leading to inconsistencies in joint strength. Properly filled gaps help ensure that the rivet can achieve the necessary preload and clamping force, which is essential for the overall integrity and performance of the assembly.

In aerospace applications, the precision of fastening directly influences the reliability and safety of structures. Any misalignment or inadequate fastening due to gaps could result in structural failures during operations. Thus, a focus on eliminating gaps through the use of inspection shims is essential to achieve the desired fastening precision required in the industry.