The forces acting on a gas tungsten arc （GTA） weld pool are analyzed. A model of static force condition for fullypenetrated weld pool is developed, and the criterion is set up to judge and evaluate the occurrence te...The forces acting on a gas tungsten arc （GTA） weld pool are analyzed. A model of static force condition for fullypenetrated weld pool is developed, and the criterion is set up to judge and evaluate the occurrence tendency of burn-through defect. Transient variations of the forces affecting the surfaces deformation and collapsing of weld pool are computed, and the percentages of their influencing roles are obtained. For specific material and workpiece thickness, the threshold values below which the burn-through phenomenon does not occur are determined, and compared with the experimental results.展开更多
The intelligent integrated predictive model of synthetical permeability was established using the fuzzy classifier to combine the time sequence predictive model with the craftwork parameter predictive model. Then, the...The intelligent integrated predictive model of synthetical permeability was established using the fuzzy classifier to combine the time sequence predictive model with the craftwork parameter predictive model. Then, the estimation model of burn-through point(BTP) based on pipe stress point(PSP) method and the predictive model of BTP were proposed. The optimal control of permeability and heat states was implemented by using the fuzzy expert controller with self-studying mechanism. The application of the intelligent control technique suppresses 17% of the fluctuation of synthetical permeability and 12% of the fluctuation of BTP, stabilizes the output and quality of sinter and settles the basis for the optimization of output and quality of sintering process.展开更多
基金The authors are grateful to the financial support for this project from the National Natural Science Foundation of China under Grant No. 50475131.
文摘The forces acting on a gas tungsten arc （GTA） weld pool are analyzed. A model of static force condition for fullypenetrated weld pool is developed, and the criterion is set up to judge and evaluate the occurrence tendency of burn-through defect. Transient variations of the forces affecting the surfaces deformation and collapsing of weld pool are computed, and the percentages of their influencing roles are obtained. For specific material and workpiece thickness, the threshold values below which the burn-through phenomenon does not occur are determined, and compared with the experimental results.
基金Project(60425310) supported by the National Natural Science Foundation of China Project supported by the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of Ministry of Education of China
文摘The intelligent integrated predictive model of synthetical permeability was established using the fuzzy classifier to combine the time sequence predictive model with the craftwork parameter predictive model. Then, the estimation model of burn-through point(BTP) based on pipe stress point(PSP) method and the predictive model of BTP were proposed. The optimal control of permeability and heat states was implemented by using the fuzzy expert controller with self-studying mechanism. The application of the intelligent control technique suppresses 17% of the fluctuation of synthetical permeability and 12% of the fluctuation of BTP, stabilizes the output and quality of sinter and settles the basis for the optimization of output and quality of sintering process.
