Tracking Panel Movement during Stamping Process using Advanced Optical Technology 2020-01-0541
The metal panel is comprehensively applied in the automotive industry. A significant issue for the metal panel is the deflection when did the movement in the press line of the stamping process. Unpredictable deflection could result in the cut off of press line. In order to control the deflection in a safe zone, Finite element tools are used to simulate the panel transform process. However, the simulation needs experimental validation where conventional displacement measurement techniques could not satisfy the requirement of vast filed displacement and accuracy point tracking. In this study, multi-camera digital image correlation (DIC) systems have been developed to track a panel movement in the press line of the stamping process. There are some advantages for applying the DIC system, which is non-contact, full-field, high accuracy, and direct measurement techniques that provide the evaluation displacement of the metal panel and press line. Nevertheless, the traditional stereo DIC system (with two cameras) has a limited field of view, and the multi-camera DIC system expands the field of view and enables the measurement of panel deflection during the stamping process. Six cameras were applied parallel in proper to record the whole transformation process of the metal panel from rises up until drop off. Every two cameras constitute a stereo DIC system, and six cameras build three pairs. Two adjacent pairs have an overlapping zone so that the data measured can be stitched together. In this paper, we will describe a methodology to measure panel movement and to separate the panel vibration from the panel movement.
Bicheng Guo, Xiaowan Zheng, Boyang Zhang, Rong Wang, Lianxiang Yang