【作者】 赵斌；

【导师】 徐永绥； 牟恕宽；

【作者基本信息】 大连交通大学 ， 机械工程， 2007， 硕士

【摘要】 本课题是根据大连机车车辆有限公司开发12V280ZJ型柴油机项目的需要而选定，是国务院振兴东北老工业基地政策的国债投资的技术改造项目的重要组成部分，是大连机车投入巨资开发的重点科技项目。本文对我国铁路内燃机车的大型柴油机曲轴的生产情况和现状进行了介绍，分别论述了目前大量使用的16V240ZJ型柴油机和本课题研究的12V280ZJ型柴油机锻钢曲轴的结构形式、毛坯的成型、传统的加工工艺流程、轴颈的加工、动平衡、表面强化方式、技术测量、失效的形式和修复方法等。通过科学安排加工工艺，选择加工设备、装备、控制变形，保证了曲轴的加工精度。通过改进传统的轴颈粗加工工艺，使用先进的车铣复合加工中心，大大提高了粗加工效率。通过使用框架式多点支承的动平衡方式，减少曲轴动挠度的影响，并提高连接装置的重复定位精度，保证重复检测精度，以克服在动平衡领域中普遍存在的令人困惑的难题，这是一个创新点。通过试制，填补了大连机车锻钢曲轴制造的历史空白，掌握了锻钢曲轴机械加工工艺、热处理调质和渗氮加热防变形工艺、动平衡试验工艺等等，提高了生产效率，形成一套完整的适合于锻钢曲轴大批量生产的工艺与装备。通过本课题的研究，使大连机车的锻钢曲轴加工达到了国内先进水平。本课题重点研究内容：1．科学安排加工工艺，选择加工设备、装备，控制变形，保证加工精度。2．选择合理的动平衡工艺，尤其是解决目前传统工艺中普遍存在的重复检测结果差异过大的问题。3．提高粗加工工作效率。更多还原

【Abstract】 The subject is established according to 12V280ZJ type of engine manufactured by DLOCO. It is important part of the project that strengthen northeast industrial base of the policy set by State Department, It’s important scientific research project developed by DLOCO.The article gives the introducion that current machining conditions of crankshaft used in the large type of engine in our railway locomative. It tells us something about the forging crankshaft that being used a great deal in 16V240ZJ type of engine and studied in 12V280ZJ type of engine ,such as structure,form of blanket,conventional technical process,machining the crankshaft journey,dynamic balance ,surface hardening,checking measure -ments,form of disabled,ways of repairing and so on.It keep machining precision of crankshaft by arranging technology scientific, choosing the equipments and fixtures and controlling the distortion.It increase the efficiency of rough machining by improving conventional rough maching. technology and using the advanced Millturn CNC.In order to overcome flexibility in the dynamic balance,we take some ways to reduce influences of flexibility,we improve precision of frequently positioning and keep precision of frequently checking by taking multi-points supports. The method is a innovative point.It added a historical record through trial-manufacture the forging crankshaft in DLOCO. We mastered some technology such as machining ,quenching and tempering ,nitriding and dynamic balance test etc. These improve greatly efficiency and form a set of technology and equipments for machining the forging crankshaft.The level of maching the forging crankshaft in DLOCO is as advanced as country’s through this research.The emphases of the article:1. Arranging technology scientific, chosing the equipments and fixtures and controlling the distortion to keep keep machining precision of crankshaft .2. Choosing reasonable dynamic balance technology,especially solving frequently checking problems existed in present conventional technology .3. Improving the efficiency of rough machining .更多还原