邮资机摩擦分离机构数值仿真及其设计优化

发布时间：2018-01-17 21:27

本文关键词：邮资机摩擦分离机构数值仿真及其设计优化　出处：《浙江工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：邮资机是国内外邮政领域广泛使用的自动化信件处理设备,大幅度提高了邮政部门的工作效率。但目前国内邮资机产品分离效率低,且信函类卡塞、漏盖现状明显。因此,本文提出并设计了一种新型摩擦分离机构,基于LS-DYNA软件建立了其独有的三维动力学仿真模型,研究分析了其工作性能的主要影响因素并提出相应的改进措施,通过振动实验和模态分析对分离机构做进一步优化改进,本文的主要工作和成果如下: 1.结合相关文献的理论研究成果及摩擦分离机构的机械原理,设计了一种以橡胶静压板与橡胶齿形圆柱传送带为组合的新型摩擦分离机构,并利用理论力学分析其分离过程中的关键动力学参数。 2.通过对关键影响因素——压辊角度的动力学仿真分析,设定了摩擦分离机构的四个档位,分别为压辊角度37°(0.2mm~2.5mm)、26°(2.5mm~5mm)、18°(5mm~8mm)、5°(8mm~10mm),确保了不同厚度的信封都能被有效分离。 3.通过摩擦分离机构的振动实验分析,得出了信封进出分离通道是影响摩擦分离机构振动的主要来源,且其振动强度随着分离信封厚度的增加而增大,而分离混合厚度信封时振动强度最低。 4.通过施压机构的模态分析,得出了邮资机高速工作下压簧片会与其工作频率发生共振而左右摇摆,影响信封的运动姿态,并通过增加压簧片的厚度加以改进。本论文针对国内邮资机存在的分离效率低、卡塞率、双飞率高等问题,设计了一种新型的摩擦分离机构,并结合动力学仿真分析确定其关键结构及动力参数,通过实验测试和模态分析对其做进一步改进,达到了很好的效果。
[Abstract]:Postage machine is an automatic letter processing equipment widely used in the field of postal service at home and abroad, which greatly improves the work efficiency of the postal department. But at present, the separation efficiency of domestic postal machine products is low, and the letter type Cass. Therefore, a new friction separation mechanism is proposed and designed, and its unique 3D dynamic simulation model is established based on LS-DYNA software. The main influencing factors of its working performance are analyzed and the corresponding improvement measures are put forward. The separation mechanism is further optimized and improved by vibration experiment and modal analysis. The main work and results are as follows: 1. A new friction separation mechanism based on rubber static pressure plate and rubber toothed cylindrical conveyor belt is designed based on the theoretical research results of related literature and the mechanical principle of friction separation mechanism. The key kinetic parameters in the separation process are analyzed by theoretical mechanics. 2. Through the dynamic simulation analysis of the key influencing factor, the angle of pressure roller, the four gears of friction separation mechanism are set up, which are 37 掳/ 0.2mm / 2.5mm respectively. 26 掳/ 2.5 mm / 5 mm / 5 mm / L 18 掳/ 5 mm / 8 mm / 5 / 8 mm / 10 mm / L, which ensures that all envelopes of different thickness can be effectively separated. 3. Through the vibration experiment analysis of the friction separation mechanism, it is concluded that the envelope inlet and outlet separation channel is the main source of the friction separation mechanism vibration, and its vibration intensity increases with the increase of the separation envelope thickness. However, the vibration intensity is the lowest when the envelope is separated from the mixed thickness envelope. 4. Through the modal analysis of the pressure mechanism, it is concluded that the pressure Reed will resonate with its working frequency and sway to the left and right under the high speed operation of the postage machine, which will affect the motion posture of the envelope. And by increasing the thickness of the Reed to improve. Aiming at the problems of low separation efficiency, high cassette rate and double flying rate, a new friction separation mechanism is designed, and its key structure and dynamic parameters are determined by dynamic simulation analysis. It is further improved by experiment and modal analysis, and the result is very good.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH691

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