Besides the driven head, the rivet shank expansion is one key product characteristic of riveted joint. The paper studies accurate mathematical modeling of pneumatic percussive riveting based on impacting dynamics. The pneumatic percussive riveting hammer and rivet are modelled as the piston-striker-rivet impacting system. Based on the proposed pressure bar impacting model, the numerical model of the pneumatic percussive riveting is constructed in the ABAQUS. The rivet’s dynamic behavior under high strain rate and the percussive squeezing forces are studied intensively. A pneumatic percussive riveting platform is constructed to gather the percussive squeezing force during the course of pneumatic percussive riveting experiments. The riveted plates and the gathered percussive squeezing forces are considered to validate the proposed numerical model. The experimental results show that the proposed numerical model predicts the pneumatic percussive riveting well. The proposed impacting model successfully modelled the percussive riveting process of the pneumatic hammer.
Manual percussive riveting quality varies due to the different operations of the workers, which result from different training categories and processes. The paper proposed a squeezing force based percussive riveting training system to improve the recruits’ operation skills and the training efficiency. Force sensor is installed in the bucking bar to gather the squeezing force signal of the percussive riveting. The squeezing force signal of the expert technicians is used as the standard operation of the manual pneumatic percussive riveting. Quantitative indices are extracted from the squeezing force signals in order to provide the recruits with quantitative parameter for efficient training. Data-driven training categories based on the proposed training platform are developed to assure the operators maintain the qualified skills constantly. The squeezing force-based training system for pneumatic percussive riveting provides good platform for the recruits training. The proposed system can be used for high-skilled technicians training with good quality and efficiency.
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