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| 一种新型模切机间歇机构的设计与运动学 |
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吕方梅
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上海理工大学，上海 200093
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| 摘要: |
| 目的 设计一种新型的固定凸轮连杆间歇运动机构，以实现高速模切机的间歇输纸功能。 方法 首先，分析间歇机构的工作原理及组合框图；然后，在对固定凸轮五杆机构的运动连续性进行研究之后，根据运动连续性条件确定间歇机构的杆长尺寸；接着，应用ADAMS软件中相对轨迹曲线生成实体的方法设计固定凸轮轮廓曲线；最后，对基于简谐运动、摆线运动和五次多项式运动的间歇机构分别进行运动学分析。结果 基于五次多项式的固定凸轮连杆间歇机构不但可以实现预期的动静比，而且在高速运转下运动性能平稳。结论 固定凸轮连杆间歇机构具有良好的运动性能，能够满足高速模切机的工作要求。 |
| 关键词: 模切机 固定凸轮连杆 间歇机构 运动学 |
| DOI：10.19554/j.cnki.1001-3563.2020.13.029 |
| 分类号:TB486；TH112 |
| 基金项目: |
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| Design and Kinematics of a New Intermittent Mechanism for Die Cutting Machine |
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LYU Fang-mei
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University of Shanghai for Science and Technology, Shanghai 200093, China
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| Abstract: |
| The work aims to design a new intermittent motion mechanism of fixed cam linkage to fulfill the intermittent paper feeding function of high-speed die cutting machine. Firstly, the working principle and the combination block diagram of the intermittent mechanism were analyzed. Secondly, after the motion continuity of a fixed cam five-bar mechanism was studied, the bar length of the intermittent mechanism was determined according to motion continuity conditions. Thirdly, a profile curve of fixed cam was designed by generating the entity with relative trajectory curves in ADAMS software. Finally, the kinematics analysis on the intermittent mechanism based on simple harmonic motion, cycloid motion and quintic polynomial motion was carried out separately. The intermittent mechanism of fixed cam linkage based on quintic polynomial not only fulfilled the expected dynamic and static ratio, but also was stable in high-speed operation. The intermittent mechanism of fixed cam linkage has good kinematic performance and can meet the working requirements of high-speed die cutting machine. |
| Key words: die cutting machine fixed cam linkage intermittent mechanism kinematics |
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