Abstract:
This project presents the virtual design of a centering system for borescope
cameras used in the internal inspection of welded joints in pipelines. A company
in the non-destructive testing (NDT) sector has identified recurring misalignment
issues of the camera head, which negatively affect the visibility of the weld bead
and reduce the quality of inspections. To address this problem, a detailed
analysis of technical and operational requirements was conducted, including
interviews with specialized personnel, field observations, photographic
documentation, and dimensional evaluation of pipelines.
The conceptual design was developed through parametric CAD modeling using
SolidWorks®, where a rigid central base and a modular set of flexible rings
adaptable to 4”, 6”, and 8” diameter pipes were proposed. The selected materials
for additive manufacturing were PETG for the base and TPU for the rings,
chosen due to their suitable combination of strength, flexibility, and mechanical
stability. The prototype’s performance was validated through motion simulations,
finite element analysis (FEA), and stress evaluation using Mohr’s Circle,
demonstrating structural stability, controlled deformation, and reliable centering
with appropriate radial clearance.
The results show that the system maintains camera alignment with a deviation
of less than ±0.5 mm, improves cable stability against buckling, and ensures
smooth movement within the pipe. Therefore, the proposed design represents a
viable, modular, and cost-effective solution that significantly enhances the
accuracy, efficiency, and quality of industrial borescope inspections.
