CFRP/钛合金叠层结构螺旋铣孔加工机理与缺陷抑制策略

项目名称： CFRP/钛合金叠层结构螺旋铣孔加工机理与缺陷抑制策略

项目编号： No.51275345

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： 秦旭达

作者单位： 天津大学

项目金额： 86万元

中文摘要： 航空制造领域复合材料和钛合金使用比例大幅增长，使得碳纤维增强复合材料/钛合金一体化、无缺陷高效率制孔成为飞机装配过程急需解决的关键问题。本项目以碳纤维增强复合材料/钛合金一体化螺旋铣孔过程为研究对象，研究CFRP /钛合金叠层结构螺旋铣孔过程切削机理、专用刀具设计及工艺优化。采用理论分析、仿真与试验相结合的方法，考虑螺旋铣孔过程低应力，断续切削的特点，研究钛合金、复合材料螺旋铣孔过程动力学，建立各向切削力模型、切削区温度场模型，分析加工过程中力、热、刀具磨损等因素对缺陷形成的影响规律，研究叠层结构一体化制孔引起的新形式缺陷产生机理和抑制方法；结合刀具磨损机理，研制CFRP/钛合金叠层结构螺旋铣孔专用刀具；优化螺旋铣孔工艺，建立切削数据库。本项目提出一种新的针对CFRP/钛合金叠层结构无缺陷、高效制孔整体解决方法，研究成果对提高飞机装配质量和效率具有重要意义。

中文关键词： 螺旋铣孔；CFRP/Ti叠层构件；损伤机理；螺旋铣孔刀具；工艺参数优化

英文摘要： With a significant growth in proportion of composite materials and titanium alloys in aviation manufacturing field, the key issue of hole-making on the aircraft assembly process with non-defect and high efficiency needs to be resolved. In this subject, the integrated hole-making in CFRP/titanium alloy laminated structure by using helical milling process is studied, and the cutting mechanism, tool design and process optimization were also included. With combination of theoretical analysis, simulation and tests, and focused on the characteristics of low-cutting stress and intermittent cutting process of helical milling, the cutting force model and cutting temperature model would be built; and the mechanism of defects formation by reason of critical cutting force and cutting heat in helical milling process will be studied; the mechanism and inhibition methods of new type damages caused by the laminated structure were analyzed. Based on the tool wear mechanism in helical milling process, the special tool with great adaptability for CFRP/titanium alloy is developed; optimizing the cutting process and establishing the cutting database for CFRP/ helical milling process.This project propose an integrated solution for hole-making, the research results will have a great significance on improving the quality and efficiency

英文关键词： Helical Milling；CFRP/Ti Stacks；Damage Mechanism；Helical Milling Cutter；Machining Parameter Optimization