关键词: 整经机械, 自动化换纱, 力学建模, 模态分析, 谐响应分析

Abstract: "Warping is a critical process in weaving preparation, which involves winding a certain number of warp yarns onto a warp beam in parallel, with uniform and appropriate tension, to meet the required length and width specified by the process. The warp yarns are drawn out from full cones hanging on the spindles of the creel. Nowadays, the intermittent warping cone creel is favored by most enterprises due to its advantages in facilitating yarn unwinding, saving floor space, and improving warping efficiency. Intermittent warping cone creels are mainly categorized into three types: sectional type, small V-shaped chain rotary type, and large V-shaped chain rotary type. The warping workshop represented by Company G faces issues such as low work efficiency and high labor intensity in manual bobbin loading and unloading, coupled with limited factory space that makes it difficult to accommodate existing automated creel systems. To address these issues, a novel chain-type circulating creel equipped with automatic unloading and material recovery devices has been designed. Research has established models for the main body of the chain-type circulating creel, the unloading device, and the empty bobbin recovery device, and elaborated on their working principles. Based on the roller arrangement in existing circulating creels, a guide rail arrangement cooperating with V-shaped rollers was proposed. Furthermore, by simplifying the force model of a single-row creel, the contact force between the outer side of the V-shaped roller and the guide rail was calculated to be . In ANSYS Workbench, boundary conditions consistent with real-world scenarios were added, and the obtained simulated contact force deviated by less than 5% from the theoretical calculation, thereby verifying the validity of the model. Finally, to investigate the vibration mechanism of the creel during operation, finite element analysis software was used to conduct modal analysis and harmonic response analysis. The results indicated that the modal vibration frequency of the creel ranged from to . When it was within the of 18‒27 Hz range, significant deflection occurred at the end of the creel. Therefore, during the rotation of the empty bobbin on the creel, the motor's output frequency should avoid the aforementioned frequency range. The research findings indicate that the creel model exhibits high reliability for its load-bearing components under maximum load conditions. When the creel stops and empties bobbins at the head of the machine, the output frequency of the motor driving the circular rotation of the creel should avoid the modal vibration frequency range of the creel to ensure its stable operation."

Key words: warping machinery, automatic yarn changing, mechanical modeling, modal analysis, harmonic response analysis