目的 针对复合烟支因启动轨压缩量不当导致的搓接错位问题,旨在通过优化启动轨结构提升材料搓接同步性,以抑制缺陷并提高质量。方法 提出一种复合烟支搓接同步性优化方法。通过结合赫兹接触理论、摩擦试验与刚柔耦合分析,确定材料的径向弹性模量与摩擦因数;进而采用LS-DYNA软件仿真分析不同转速（60~200 r/min）下的运动规律。仿真结果表明,将启动轨烟芯段位置下移0.1 mm可最优地提升同步性,故将此作为优化方案。结果 在200 r/min工况下,优化后启动轨使各段材料最大间距由原0.39 mm降至0.04 mm,降幅达89.7%,搓接同步性得到显著改善。结论 该方法能有效优化搓接过程,抑制错位,为启动轨的关键参数设计提供了直接理论依据。
Abstract
To address the tipping misalignment of composite cigarettes caused by inappropriate compression of the starter rail, the work aims to improve the tipping synchronization of materials by optimizing the structure of the starter rail, so as to suppress forming defects and enhance product quality. An optimization method focusing on motion synchronization was proposed. The key parameters, including the radial elastic modulus and the friction coefficients of the materials were determined by combining Hertz contact theory, friction tests, and rigid-flexible coupling analysis. The motion behavior during tipping under various rotational speed (60-200 r/min) was then simulated with the LS-DYNA explicit dynamics code. The simulation results indicated that downwardly offsetting the tobacco core segment's contact profile on the starter rail by 0.1 mm optimally improved synchronization, and thus this was determined as the final optimization scheme. At 200 r/min, the optimized starter rail reduced the maximum inter-segment spacing from 0.39 mm to 0.04 mm, achieving a reduction of 89.7% and demonstrating a significant improvement in motion synchronization. The proposed method effectively optimizes the tipping process and suppresses the misalignment, providing a direct theoretical foundation for determining the critical design parameters of the starter rail.
关键词
复合烟支 /
启动轨 /
刚柔耦合 /
搓接同步性 /
LS-DYNA仿真
Key words
composite cigarette /
starter rail /
rigid-flexible coupling /
motion synchronization /
LS-DYNA simulation
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基金
中国烟草机械集团重点科技项目（中烟机集技〔2020〕72号）
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