金属-陶瓷功能梯度材料的自诱导电火花加工方法及其控制策略研究

项目名称： 金属-陶瓷功能梯度材料的自诱导电火花加工方法及其控制策略研究

项目编号： No.51275112

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 王振龙

作者单位： 哈尔滨工业大学

项目金额： 80万元

中文摘要： 金属-陶瓷功能梯度材料以其优异的特性和新颖的设计理念而备受世人瞩目，其广泛的应用前景令人期待，但目前国内外对该种材料的研究还普遍停留在材料的设计、制备及其性能评价阶段。而一种新材料从出现到实际应用，有效的加工手段是不可或缺的。本项目将在深入研究金属-陶瓷功能梯度材料物理特性的基础上，将材料本身的金属作为陶瓷电火花加工的自诱导源，充分利用材料和加工方法本身的特点，研究和探索一种基于电火花加工技术的新材料加工方法，对其相关基础理论、工艺与装备条件、控制策略等进行系统深入的研究。建立梯度材料持续自诱导的电火花加工仿真模型；研究金属层、梯度层、陶瓷层加工时的放电状态；确定自诱导放电的产生机制；以梯度材料不同加工阶段放电状态的变化作为激发源，提出逐级自适应模糊控制策略和抬刀对策，并研制相应的脉冲电源；对梯度材料电火花加工的残余应力等表层特性进行评定。为金属-陶瓷功能梯度材料的应用提供加工技术支撑。

中文关键词： 金属-陶瓷功能梯度材料；电火花加工；控制策略；自诱导；表面特性

英文摘要： Metal-ceramic functionally graded material with its excellent features and innovative design concept has been attracted worldwide attention. But the research on these kinds of materials has been still stayed in the stages of materials design, preparation and performance evaluation in domestic and abroad. Howerver, an effective processing method is essential and indispensable for the emergence of a new material to practical application. A new material processing method and control stratedy based on EDM technology is studied and explored on the premise of full using of the graded material characteristics and processing methods in this project. It is based on the deep study of the metal-ceramic functionally graded materials' physical characteristics, and the metal in ceramic graded material itself is used as the EDM self-induced auxiliary electrode. The EDM basic theory, processing and equipment conditions and the control strategy for the metal-ceramic graded material are studied systematically. The EDM simulation model of the graded material is established. The discharge status during the processing of the metal layer, gradient layer and ceramic layer is analysed. The mechanism of self-induced EDM discharge is determined.The layer-by-layer adaptive fuzzy control strategy and electrode tool lifting strategy is prop

英文关键词： Metal–ceramic functionally graded materials；Electrical discharge machining；Control strategy；Self-induced；Surface features