3D Metrology and Model Reconstruction Method for Physical Tooling in Aircraft Manufacturing
CHEN Lili1, YIN Huabin1, LIU Shenglan2, ZHANG Liyan2
1. Manufacturing Technology & Project Control Department, AVIC Chengdu Aircraft Industrial (Group) Co., Ltd.,Chengdu 610091, China;
2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics,Nanjing 210016, China
In aircraft manufacturing, there are various types of physical toolings such as template, master tooling,mould and so on. It is quite a challenge to convert these physical toolings to digital ones due to their variable forms and complex shapes which comprise freeform surfaces, complicated carved curves and details. In this paper, the 3D metrology and model reconstruction method for digitizing the physical toolings are discussed. First, the crucial geometry elements in design of aircraft manufacture tooling are summed up and analyzed. Then, an integrated 3D metrology, which composites a photogrammetry, a structure light scanner, and an optical tracking tactile probe, is utilized to capture the physical toolings. The integrated metrology combines the advantages of all of the three techniques and is able to provide measuring data with completeness and high precision. Thereafter the strategy for improving the process efficiency is presented by considering the size, form and complexity of the physical toolings. For the tooling with large size and high complexity, the converting strategy is set to not use the whole measuring data, but the surface point clouds, a few basis carved curve points which indicate the structure of the aircraft, and the existing 2D drawings. It is highly efficiency and the precision meets the needs.