【作者】 白亚江；

【导师】 张连洪；

【作者基本信息】 天津大学 ， 机械制造及其自动化， 2006， 硕士

【摘要】 随着环境污染的日益严重,保护环境已成为二十一世纪社会发展的主题。从2000年开始,我国政府开始实施新的排放标准,我国原有的系列燃油喷射系统,技术含量低,工作能力小,不能满足新的排放法规和市场的要求。由天津大学内燃机重点实验室研制的新一代内燃机平衡阀偶件,既能满足新的排放法规的要求,又能满足国内柴油机的装机要求,适应了目前柴油机向大功率增压中冷的发展趋势,经济性能良好,适合己经实施的排放法规。在今后的两三年内,新一代内燃机平衡阀偶件将在内燃机行业中得到广泛的应用,而平衡阀偶件的大批量稳定性生产也就成了至关重要的问题。本文在借鉴国内外柱塞偶件加工工艺的基础上,对平衡阀偶件结构及其工艺难点进行了分析,制定了平衡阀偶件大批量生产加工工艺流程,并根据现有生产条件加工平衡阀偶件试验样件,对其中出现的问题进行分析解决。提出了精密柱塞副偶件调整法加工的尺寸偶配统计学原理,给出了偶件配合间隙形成条件、偶配间隙与配偶尺寸统计特征的关系,为偶件的分选偶配及面向分选配对的调整法偶件加工提供统计学理论依据,为实现偶件加工统计过程控制和6σ偶配打下基础。根据偶件加工统计过程控制(Statistical Process Control,SPC)理论,编程开发了平衡阀偶件SPC质量监测系统。对珩磨精密加工工艺进行了实验研究,分析了粗珩加工中网纹角、工作压力、珩磨速度与材料去除率的关系。更多还原

【Abstract】 Environmental protection has become a main topic of social development of 21th century along with increasingly severe pollution of the environment. And the new emission control regulation has come into force in our country since 2000. Original fuel injection system series with low technology and capacity made in our country can not meet the new emission control regulation as well as the market demands. The balancing valve couples of new generation internal combustion engine developed by the State Key Laboratory of engine of Tianjin University can meet not only the demands of the new emission control regulation but also the demands of domestic diesel engines. Therefore it is suitable for the developing trend of the diesel engine for high power and intercooling with good economy. In the coming two or three years, the balancing valve couples of new generation internal combustion engine is becoming widespread use in the industy of internal combustion engine. Therefore it is important to volume-produce the balancing valve couples used for internal combustion engine.Based on the machining technology for plunger couples at home and abroad, the present work aims to lay down process flow for balancing valve couples and to machine experimental samples according to present manufacture condition. Considering the manufacturing state-of-arts of precision plunger pair couple, statistics principle for dimension matching of precision plunger pair couple was proposed in this paper. Condition of dimension matching, relationships among the statistical characteristics of matching clearance and dimensions were put forward to provide a statistics theoretical basis for the grouping pairing method and regulated machining based on it and, above all, to lay a foundation for the statistical process control of couples machining and 6-σgrouping pairing. SPC quality monitor system for balancing vlave couples are programmed according to the theory of statistical process for couples machining. Honing experiments are executed and the relationships between reticulate cross-angle, honing pressure, honing rates and material removal rate are analyzed in rough honing。更多还原