【作者】 朱成康；

【导师】 彭伟； 王明环；

【作者基本信息】 浙江工业大学 ， 机械制造及其自动化， 2010， 硕士

【摘要】 能源问题已经成为制约国家经济社会发展的重要因素之一,通过技术进步开发高效节能的换热器、冷凝器、预热器是解决能源问题的有效途径之一。冷却系统中,肋化内冷却通道的设计可以达到提高热交换、改善冷却效果的目的,因而得到广泛重视,成为当前的研究热点。螺旋冷却孔是肋化通道的一种形式,热交换效果优越。然而对于孔径尺寸在2mm以下的螺旋冷却孔,采用常用机械加工方法难以实现。电解加工法由于其特有的属性,可以用于微小孔内壁结构的加工。由于微细电解加工工艺实验、装备设计、工具电极设计等需要花费较多的时间,不利于应用推广,利用仿真技术可以在计算机上实现模拟电解加工过程,对工件加工形态、阴极形状进行预测,准确分析加工过程的影响因素,加工准备时间大为缩短。论文在分析电解加工原理的基础上,分析了微细螺旋孔电解加工的成型规律,建立成型规律数学模型,在此基础上采用MATLAB软件对成型过程进行模拟仿真,并在搭建的实验加工平台上进行了螺旋孔电解加工实验研究,并以此来验证模型的合理性。研究同时开发出了加工过程的可视化人机交互平台,实现了工件蚀除过程的三维形态显示,对不同加工参数下的电解加工结果、给定加工目标下的初始参数选择进行了预测。论文的主要研究工作和研究成果如下:1.从电解加工过程中阳极蚀除规律出发,在MATLAB软件环境下建立孔径2mm以内的螺旋孔电解加工仿真模型。2.建立了人机交互式的电解加工成型过程分析系统,并可以对加工目标(加工深度0-0.5mm)下的加工参数进行反求分析。3.采用掩膜紫外光固化技术研制出螺旋工具电极,研制搭建了螺旋孔电解加工的实验平台。4.采用一种非接触式测量方法,方便、准确提取了实验数据,并采用数值计算方法验证了仿真模型。论文研究给电解加工实验提供了辅助参考,提高了实验研究的进程。更多还原

【Abstract】 Energy resources, which are affinitive to economic security and national security, are one of the prominent restraining factors of China’s economic and social development. Through technological progress to exploit Heat exchanger、Condenser、pre-heater which is Energy efficient is the essential approach to solve the energy problem. The blade-cooling system of modern gas turbines is designed as the rib-turbulators cooling passages, which can significantly ameliorate the cooling effect through improving the heat change. So people pay high attention to it and also make a lot of researches on it. The spiral cooling hole is one form of rib-turbulators cooling passage which has a good heat change effect. The general processing method is limited as it is hard to process the micro-spiral hole aperture size is less than 2mm. So the electro-chemical machining technology is used in the processing of micro-spiral holes inwall because of its peculiar attribute. Usually, much time is necessary in equipment designed and cathode designed in micro ECM process. Simulation technology on computer in ECM can decrease research time. In this article, according to the basic principle of electro-chemical machining, we analyze the shaping law of micro-spiral hole use electro-chemical machining, and establish the math model of shaping law then we can use MATLAB to simulation the shaping process, and then we test the model’s rationality with take the experiment of micro-spiral hole by electro-chemical machining in the experimental processing platform. The research Developed the Visual interaction platform for the process to take three-dimensional shape display of Workpiece removal in the process, then forecast electro-chemical machining result of different process parameter and choose initial parameters under have the Given target.The main tasks and achievements are presented as follows:1. Establishing Electro-chemical machining model of spiral hole aperture size is less than 2mm under MATLAB software environment.2. According to the simulation model, we simulate the processing of electro-chemical machining under different parameters and analyses the processing parameter.3. The development of experiment equipment of electro-chemical machining for spiral in use of shaped electrode.4. The spiral electrode was prepared by using ultraviolet mask. The electro-chemical machining experiment is made out successfully and has tested the simulation model.The research provides a secondary reference on the process of ECM experiment and improves experimental research of ECM.更多还原