无链式玉米收获机切碎装置的原理分析和虚拟设计-正文（可编辑）.docVIP

无链式玉米收获机切碎装置的原理分析和虚拟设计-正文 致谢及声明36摘 要 传统的玉米收获机主要采用链式结构进行玉米收获中的拨禾和切碎工作,本文重点是通过对国外新技术的借鉴和学习,采用切碎拨禾变速箱带动拨禾轮和切刀进行这两项工作,并对该机构进行了虚拟设计。 传统设计过程是对产品各方面性能要求进行分析、计算,然后拟定设计方案,再按选定方案进行零件图与装配图绘制,然后试制样机,样机出来对样机进行改进,再相应的修改设计图纸,不断修改和完善后才能正式投入生产,虚拟设计则可以直接进行三维可视化设计,并进行各种仿真模拟,使各项实验成本和实验时间都大大缩短,展示出了新设计手段的新特性,在此次设计中,重要利用UG软件进行切碎变速箱和升运器部分结构的三维仿真设计,并同同组其他同学协作完成了整体玉米收获机的装配工作。检验设计的合理性和可行性,对原有方案进行改进,检验三维仿真设计过程中的动态干涉情况,确保机构按预先设计方案准确运行。 关键词: 玉米收获机,切碎装置,虚拟设计,虚拟装配 Abstract The chain-driven manner is mainly used in the allocation and shredding of stem in traditional corn harvester. By means of foreign new technologies a new type of gearbox is designed in the paper that drives the finger rotor and shredding cutterAnd then the virtual design to this structure is finishedTraditional process of product design is all performance requirements analysis, design and development of the program, when the program has been identified, then do the drawing job of parts and assembling .next step is produce the prototype .When the prototype is finished, improve it. Then do the corresponding changes to the design drawings. Constantly revise and perfect before formally put into production. Virtual design can direct visualization of 3D Design, and various simulation. So various experiments and experimental costs significantly shorten the time. The new design shows a new means of design characters. In this design , mainly use the software of UG to do the 3D design simulation of the shredding gearboxAnd collaborative other students finished the whole assemble job of the corn harvesterDo the reasonable and feasibility test to the design , then improve the exist programs.3D design simulation test is used to find the dynamic interference in the process. Make sure the structure can do the motion precisely in the Pre-design program Keywords: corn harvester, shredding structure, virtual design, virtual assemble第一章 引言1.1 课题的提出和意义 我国玉米种植面积和总产量仅次于美国,居世界第二位。在我国,玉米是仅次于小麦的主要粮食作物。2004年全国玉米种植面积0.24亿公顷,约占全国总种植面积的16.6%。玉米