水润滑橡胶合金轴承精密成型模具的优化设计

发布时间：2018-04-08 09:12

本文选题：模具　切入点：水润滑　出处：《重庆大学》2011年硕士论文

【摘要】：水润滑橡胶合金轴承作为机械传动系统中的关键零部件,利用新型工程复合材料替代贵重金属,用自然水替代矿物油作为机械传动系统的润滑介质,因而具有资源节约、环境友好、结构简单、高性能等优点,近年来得到了广泛使用。但是长期以来,在水润滑橡胶合金轴承的硫化成形工艺中,一直存在着各部位加热不均匀、硫化时间长、生产效率低、劳动强度大等问题,因而导致了工件在经过成形工艺后产品的承载能力、工作速度、摩擦因素、尺寸稳定性、表面粗糙度等关键技术性能指标很难达理想效果。因此,设计一种加热均匀、加热时间短、生产效率高的装置来解决水润滑橡胶合金轴承的成型问题,有重要的工程实际意义。本论文任务来源于国家自然科学基金面上项目“大尺寸高比压水润滑轴承系统的创新设计理论与方法”(项目批准号:50775230),得到了国家自然科学基金的资助,针对国内外工程复合材料精密成形装备中等存在的关键共性技术难题,在重庆大学机械传动国家重点实验室王家序教授等人发明的一种水润滑橡胶合金轴承精密成型模具(专利申请号:200810070081)的基础上,设计并优化了一套新型的水润滑橡胶合金轴承精密成型模具。本文的主要研究工作如下: ①分析了国内外水润滑橡胶合金轴承模具平板硫化装置的发展状况,指出了传统的装置下,水润滑橡胶合金轴承硫化成形工艺存在的问题,比较了几种水润滑橡胶合金轴承模具加热方式的优劣性。 ②对橡胶制品的硫化成形工艺过程作了深入细致的分析,对硫化条件进行了介绍,为设计水润滑橡胶合金轴承精密成型模具奠定了一定理论基础。 ③通过研究水润滑橡胶合金轴承传统成形工艺中利用上下平板加热存在的问题,结合实际工艺,针对一种规格的水润滑复合橡胶轴承,初步设计出了水润滑橡胶合金轴承精密成型模具的装配图及关键部件图。 ④利用有限元软件对设计出的水润滑橡胶合金轴承精密成型模具进行了热分析以及静力分析,初步证明了论文中的模具在加热方式和脱模工序上的合理性。 ⑤介绍了模具中关键部件的实物图,在新型工程复合材料精密成形数字制造装备上,利用该模具对水润滑橡胶合金轴承进行了硫化成型,实验证明论文中的模具具有实践可行性。
[Abstract]:Water lubricated rubber alloy bearings are used as key parts in mechanical transmission system, new engineering composite materials are used to replace precious metals, and natural water is used to replace mineral oil as lubricating medium of mechanical transmission system.Environmental friendly, simple structure, high performance and other advantages, has been widely used in recent years.However, for a long time, in the vulcanization process of water-lubricated rubber alloy bearings, there have been many problems, such as uneven heating, long curing time, low production efficiency, high labor intensity, etc.As a result, the key technical performance indexes such as the bearing capacity, working speed, friction factor, dimensional stability and surface roughness of the workpiece after the forming process are difficult to achieve ideal results.Therefore, it is of great practical significance to design a device with uniform heating, short heating time and high production efficiency to solve the forming problem of water-lubricated rubber alloy bearings.The task of this paper comes from the project "Theory and method of innovative Design of large size and High specific pressure Water Lubricating bearing system" (Project Grant No.: 50775230), which is supported by the National Natural Science Foundation of China.In view of the key common technical problems existing in the engineering composite precision forming equipment at home and abroad,On the basis of a kind of water lubricated rubber alloy bearing precision molding mould invented by Professor Wang Jiaxun, State key Laboratory of Mechanical Transmission, Chongqing University (Patent Application No.: 200810070081),A new water lubricated rubber alloy bearing precision forming mould was designed and optimized.The main work of this paper is as follows:The main contents are as follows: 1. The development of water lubricated rubber alloy bearing die plate vulcanization equipment at home and abroad is analyzed, and the problems existing in the vulcanization forming process of water lubricated rubber alloy bearing under the traditional equipment are pointed out.The advantages and disadvantages of several water lubricated rubber alloy bearing die heating methods are compared.2. The process of vulcanization of rubber products is analyzed in detail, and the vulcanization conditions are introduced, which lays a theoretical foundation for the design of precision moulds for water-lubricated rubber alloy bearings.By studying the problems existing in the traditional forming process of water-lubricated rubber alloy bearing using the upper and lower plate heating, combining with the actual process, aiming at a kind of water-lubricated composite rubber bearing,The assembly drawing and key component diagram of water lubricated rubber alloy bearing precision forming die were designed.(4) the thermal analysis and static analysis of the precision forming die of water-lubricated rubber alloy bearing were carried out by using finite element software, and the reasonableness of the mold in heating mode and demoulding procedure was preliminarily proved.5. The physical drawing of the key parts in the die is introduced. The water lubricated rubber alloy bearing is vulcanized on the digital manufacturing equipment of a new type of engineering composite material precision forming.The experiment proves that the mold in this paper has practical feasibility.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3

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