基于二氧化钛光催化氧化作用的金刚石刀具刃磨理论与技术

项目名称： 基于二氧化钛光催化氧化作用的金刚石刀具刃磨理论与技术

项目编号： No.51305278

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 苑泽伟

作者单位： 沈阳工业大学

项目金额： 25万元

中文摘要： 针对超精密切削加工领域对金刚石刀具的刃磨要求以及目前金刚石刀具刃磨加工中存在的问题，提出基于二氧化钛光催化氧化作用的金刚石刀具刃磨新工艺。针对这一新工艺，研究在光催化条件下二氧化钛表面产生的强氧化性官能团（空穴和羟基自由基oOH等）与金刚石的微观作用机制，配制紫外光照射条件下具有强氧化性的新型刃磨抛光液，并借助抛光盘的机械摩擦作用和二氧化钛颗粒表面官能团的强氧化作用，以化学和机械协同抛光的形式达到原子级去除金刚石的目的。揭示金刚石刀具刃磨的微观作用过程和材料去除机理，研究二氧化钛光催化氧化作用刃磨新工艺，并检测分析刃磨后金刚石表面和亚表面的损伤。通过采用二氧化钛光催化氧化作用的方案，有效地利用光能实现材料去除，避免了传统氧化剂引起的抛光液挥发严重、氧化剂分解、污染环境、腐蚀设备、抛光效率低等问题，实现金刚石刀具的高效、高精度、低损伤刃磨。

中文关键词： 金刚石刀具；光催化；抛光；刃磨；二氧化钛

英文摘要： Aiming at the requirements and problems of diamond tool sharpening in the field of ultra-precision cutting, a new sharpening technology based on titanium dioxide photo catalytic oxidation was proposed. By the novel technology, this project researches the micro action mechanism between diamond and strong oxidative functional groups (hole and hydroxyl radical oOH, etc.) on titanium dioxide surface under photo catalysis, and prepare strong oxidative sharpening slurry in the presence of ultraviolet irradiation. With the help of mechanical scratching effect of polishing plate and strong oxidation effect of functional groups on titanium dioxide, the atomic removal of diamond was acheived under the chemical and mechanical synergistic effects. On this basis,the meterial removal mechnism and the sharpening technique are studied, and the surface and sub-surface damages are analyzed. By adopting the scheme of titanium dioxide photo catalytic oxidation, light energy is used to remove material effectively, which will aviod the problems raised by traditional oxidants, such as serious volatilization, oxidant decomposition, environmental pollution, equipment corrosion, low sharpening efficiency and so on. Finally, the sharpening of diamond tool could be realized with high efficiency, high-precision and free- damage.

英文关键词： Diamond；Photocatalytic；Polishing；Sharpening；Titanium dioxide