基于工艺模板的回转类零件工艺变型设计研究

发布时间：2018-07-28 08:19

【摘要】：工艺设计是一项复杂和不确定的活动，不仅受到企业资源、经济条件和技术条件等因素的限制，还需要设计人员的水平和经验等。为了使企业的这些设计资源和宝贵设计经验以后能得到传承和发展，在查阅相关国内外资料的基础上，本文以回转类零件中的轴类零件为研究对象，通过制定零件实例工艺模板和加工特征工艺模板，并结合参数化的设计方法，很好的实现了轴类零件的工艺变型设计。首先，介绍了CAPP的研究背景并综述了国内外研究现状，详细阐述了零件工艺的制定原理、方法、零件变型设计及工艺变型设计原理，并构建了系统总体框架。其次，以工艺模板的参数化设计为研究主线，重点研究了以下关键技术：（1）零件族的划分及建模，零件族的划分是基于工艺模板来进行工艺变型设计的基础。为了支持零件工序图的变型，零件族的建模采用与实际加工符合的减材料方法和建模最大化原则相结合，并利用配置的设计思想与工序图紧密的联系了起来。（2）零件信息模型的建立，零件信息的输入是实现零件工艺变型的关键所在，通过对轴类零件每一段特征信息的输入，判断每一轴段的加工方法，根据加工方法查询各加工阶段的余量，可以推算出零件与毛坯之间的尺寸关系。（3）加工特征的工艺变型，对零件的各个特征建立特征工艺模板，根据零件的特征参数在特征工艺模板的基础上变型出符合零件实际加工的特征工艺。（4）工艺模板的参数化，工艺模板的参数化主要是将模板中可变的部分用参数来表示，，不变的内容固定化，将模板中的参数进行更新替换可完成新零件的工艺设计。（5）零件工艺的检索与修订，在零件工艺模板库中检索与新零件相似的工艺规程，通过对相似工艺模板的修订生成新的工艺规程并重新放入模板库被下一次检索使用。最后，研究了零件族工艺模型的设计及配置管理，在以上研究的基础上实现了零件的工艺变型设计，并以轴类零件为例开发了一个原型系统。
[Abstract]:Process planning is a complex and uncertain activity, which is not only limited by enterprise resources, economic conditions and technical conditions, but also requires the level and experience of designers. In order to pass on and develop these design resources and valuable design experiences of enterprises, based on the reference of relevant domestic and foreign data, this paper takes the shaft parts of rotary parts as the research object. The process modification design of shaft parts is well realized by making process template and machining characteristic process template of parts and combining with parameterized design method. Firstly, the research background of CAPP is introduced, and the current research situation at home and abroad is summarized. The principle, method, variant design and process variant design of part process are described in detail, and the overall frame of the system is constructed. Secondly, based on the parameterized design of process template, the following key technologies are studied: (1) the partitioning and modeling of part family is the basis of process variant design based on process template. In order to support the modification of part process diagram, the modeling of part family is combined with the method of material subtraction and the principle of maximum modeling, which is in accordance with the actual machining. The design idea of configuration is closely related to the process diagram. (2) the establishment of part information model and the input of part information are the key to realize part process modification. Judging the processing method of each shaft segment, according to the machining method, the dimension relation between the parts and the blank can be calculated according to the machining method. (3) the process modification of the machining features, and the establishment of the characteristic process template for each feature of the part, According to the characteristic parameters of the part, the feature process which accords with the actual processing of the part is modified on the basis of the feature process template. (4) the parameterization of the process template, the parameterization of the process template is mainly to express the variable parts of the template by the parameters. Immobilization of the content, updating and replacing the parameters in the template can complete the process planning of the new part. (5) the retrieval and revision of the part process, and the retrieval of the process plan similar to the new part in the part process template library. New process procedures are generated by revising similar process templates and re-placed into the template library for the next retrieval. Finally, the design and configuration management of the part family process model are studied. Based on the above research, the process variant design of the part is realized, and a prototype system is developed by taking the shaft part as an example.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH162;TP391.72

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