【作者】 彭波；

【导师】 廖敦明；

【作者基本信息】 华中科技大学 ， 材料加工工程， 2011， 硕士

【摘要】 弯管类零件在汽车、船舶、航空等许多工业部门得到广泛应用。弯管胎具是对直管路进行弯曲,使其成形为一定空间几何形状弯管的装置。汽车等工业的飞速发展使弯管制造企业对弯管胎具的需求量不断增加,竞争的压力使得各个企业更加注重弯管胎具设计技术的改进与开发。传统的弯管胎具设计方法是:基于通用三维CAD软件,完全人工进行设计、计算。这种人工设计方法效率低,可靠性差。另外,由于弯管类产品的相对专用性,胎具的设计也必须具备很强的专用性。因此,提高胎具的设计效率和质量是急待解决的问题,行业内亟需对于专用弯管胎具设计系统的研究与开发。基于此背景并结合某企业需求,本课题基于UG二次开发了适用于弯管的胎具设计系统。本文首先介绍了国内外通用三维CAD系统以及基于它们设计胎具的发展概况与发展方向,在此基础上结合企业对胎具的设计需求,对系统的总体结构进行了设计,明确了系统各个模块的功能以及相互之间的联系;介绍了系统开发平台和开发工具的选择;详细介绍了系统开发要用到的关键技术:参数化设计方法、标准件模板技术、胎具模块的自动装配技术。管路弯曲的执行(各个弯的形成)与胎具模块的生成是胎具设计的核心。论文以实例阐述了管路弯曲的本质,提出了“反求思想”的执行管路弯曲实现算法,确保了管路弯曲的效率与精度;使用参数化设计方法,结合标准件模板技术与自识别装配技术,实现了管路各个弯的胎具模块的生成。在上述基础上,以企业应用实例验证了应用本系统进行弯管胎具设计的可行性与高效性。使用本系统进行胎具设计,方便而快捷,能够大大提高胎具设计的效率。更多还原

【Abstract】 Elbow pipe parts are widely used in many industries, such as automobile, shipping and aircraft, etc. Bending clamping fixture is a type of mechanical device used for getting pipes into shape. With the rapid growth of the industry, bent pipe manufacturers have increased their demand for clamping fixture day by day and the competition has forced them to pay more attention to the improvement and development of elbow pipe clamping fixture technique.Conventional design of clamping fixture is based on the universal CAD software, wholly designed artificially. However, bent pipe accessories have relative dedication character, which brings clamping fixture design a necessity of sharp dedication character also. So to promote the designing efficiency and quality is an imperative problem to deal with, and the industry is desiderating the research & development of dedicated elbow pipe clamping fixture design systems. Based on the above background, this research uses UG as the platform to complete a clamping fixture design system applied to elbow pipes.This article firstly analyses the origin, purpose and significance of this research, describes domestic and overseas development of common three-dimensional systems and the secondary development clamping fixture design systems developed on them, and then introduces the development trend of them; on the above basis and according to the designing demand of the company, makes an overall design of the system, clarifies the function of each module and the relations between them; introduces the development platform and tools; gives a detailed introduction of key techniques demanded by this secondary development: parameterization design method, standard component template technique, self-recognition assemble of clamping fixture module.The bending of the pipes and the generation of clamping fixture module are the core of this design. This paper elaborates the essence of tube bending and brings up the“Reverse Technique”algorithm of bending execution, which guarantees the efficiency and accuracy of pipe bending; according to standard component template technique and self-recognition assembly technique, uses parameterization design method to achieve the generation of each clamping fixture module.On the above basis, this paper certified the feasibility and high-efficiency of using this system with a real pipe design example. The result shows the design efficiency can be greatly increased by using this system for clamping fixture design.更多还原