【作者】 李旺；

【导师】 赵长财；

【作者基本信息】 燕山大学 ， 材料加工工程， 2010， 硕士

【摘要】 本课题来源于南京某气瓶制造厂325、425旋压机研发项目。作为一种气体储存容器,CNG气瓶已在工业、矿业、军事、医药、潜水、汽车等领域得到了广泛应用。传统CNG气瓶采用焊接的方法,随着旋压技术的不断发展,发现用旋压技术生产CNG气瓶是更好的办法,能从根本上消除传统焊接生产中焊缝强度降低、脆裂和拉应力集中等缺陷,使气瓶的气密性和耐压性有了很大提高,同时具有所需设备吨位小、模具加工成本低、成形范围广、产品质量高等优点。为此研究团队在赵长财教授的带领下自主研发了425、325全自动数控气瓶旋压机(生产线),此设备可实现对钢质气瓶局部加热后作无芯模的多道次收口和封底,结构简单,外观整洁,生产效率高,提高了国内外数控热旋压机研制的水平,降低了设备成本,提高了产品市场竞争力。本文主要研究内容和结果如下:建立了既符合实际又兼顾效率和计算精度的旋压工艺有限元模拟模型,解决了材料模型建立、边界条件处理和旋轮轨迹实现等关键问题,得出旋压力能参数,为旋压机的整体设计奠定力学基础。基于上述力能参数,设计CNG气瓶热旋压机本体结构。此旋压机主要由主轴机构、模具装置、翻料装置、加工运送装置、加热上料装置、分料装置、吹底枪装置、传送辊道等部分组成。本文主要针对主轴机构和模具装置进行结构设计阐述,针对关键部件进行运动学分析和力学计算,并对主要零部件进行有限元模拟分析和优化。结果表明,该旋压机整体满足结构刚度和强度,旋制出的气瓶尺寸精度高,表面质量好,达到了国际先进水平。更多还原

【Abstract】 The project comes from 325, 425 spinning machine R & D projects proposed by a gas factory in Nanjing.As gas storage vessel, CNG cylinders have been widely used in the industrial, mining, military, medicine, diving cars and other fields. The traditional method to produce CNG cylinders is welding, but with the continuous development of spinning technology, people found that spinning technology is a better way to produce CNG cylinders. It can virtually eliminate the defects such as weld strength reduction, brittle rupture and tensile stress concentration of the traditional welding production, so that air tightness and pressure of the cylinders have been greatly improved, meanwhile it has the advantages such as lower tonnage equipment, lower mould manufacturing cost, wider forming range and higher production quality etc.The 425 and 325 automatic CNG cylinder spinning devices (production line) were developed by the research team. This device can achieve non-core multi-pass shell nosing and back cover after local heating the steel cylinders. It has simple structure, neat appearance, high efficiency, and has improved the level of thermal shut CNG spinning machine at home and abroad, lower the equipment costs, and improved market competitiveness of the production.What the paper studies are as follows:Taking into account realistic, efficiency and accuracy, established finite element simulation model of spinning technology, saluted the material model, boundary conditions, the roller track and other key issues, drew spinning force energy parameters, lay the foundation mechanics for the overall design of the spinning machine.Based on the above force energy parameters, designed the body structure of CNG cylinder hot spinning machine. The spinning machine is made of spindle unit, mould device, stirring device, processing delivery device, heating and feeding device, sub-feed device, blowing the end unit, transfer roller and other components. This paper describes the design of spindle unit and mould device, the kinematics analysis and mechanical calculations for the key components, and the finite element simulation analysis and optimization of the main components. The results show that this spinning device as a whole has meet the structural stiffness and strength, the productions which this device produce have high dimensional accuracy, surface quality, and the device has reached to the international advanced level.更多还原