【作者】 赵剑波；

【导师】 林树忠；

【作者基本信息】 河北工业大学 ， 机械制造及其自动化， 2003， 硕士

【摘要】 本文结合激光微细加工与并联机构两个领域，提出了用于激光微细加工系统的三自由度并联平台课题。由于少自由度机构构型设计的困难性，在考察现有机构构型特点的基础上，本文提出了一种从功能到构型的新设计方法——功能拼凑法，并成功的用于本课题的构型设计，最后对构型的稳定性进行了理论分析。对于通过新方法提出的160种机构构型，本文通过成组分析的方法，基于加工需求和优化原则，快捷、有效的对构型进行了优化选取，得出了优化构型并进行了改进。对于新型机构进行了理论分析，发现其正解能够解析表达，且十分简洁，利于数控插补的进行，将极大的提高数控系统的性能。其奇异位形也具有显著的特性，根据这个特性，可以大大减少对构型奇异位形分析的工作量，方便了机构路径规划的进行。针对并联平台的功能特点，对机构的工作空间的意义作了重新定义，并作了分析。在确定了尺度综合的参数后，基于工作空间和加工空间进行了尺度综合，该尺度综合方法简捷、有效。对新型机构进行了实体结构的研究，选用了适宜的执行器，并对执行器的发展作了论述；提出了适合本构型的新型虎克铰，提出了基于不同工作要求的三种模型，并用CAD技术进行了空间模型的实体搭建。更多还原

【Abstract】 This article combines two fields which are laser minuteness process and parallel mechanism to put forward 3-DOF parallel platform used in the laser minuteness process system.Because of the difficulty of few DOF structure design, on the basis of reviewing the present structures, the article brings forward a new design method -function scrabbling method which is from function to structure and supplied into the structure design of this subject successfully. At last the structure stability is made an academic analysis.160 kinds of structures mentioned by the new method are optimized rapidly and effectively based on machining requirement and optimized principle. The structure optimized can be obtained and improved.The new structure is analysed theoretically, the forward solution can be made an analytic expression succinctly, favoring the numerical control interpolating and improving the capability of the numerical control system. Singular continuation possesses the remarkable characteristic. According to this characteristic, the workload of the structure singular continuation is reduced to a large extend, and structure route layout is convenienced.To the function characteristic of the parallel platform, the meaning of work space of the structure is redefined and analysed. After defined the parameters of the measure syntheses, based on the work space and machining space , the measure syntheses can be done .This measure syntheses method is concise and effective.The new structure is researched on the aspect of the entity structure, the feasible operator is choiced . At the same time the development of operator is discussed in the article, the new type U joints fitting for this structure is put forward, three kinds of models based on different work requirements are presented , moreover the entity buildings of the space models have been accomplished by means of CAD technique.更多还原