摘要
基于广域曲率吻合原则,研究了利用环形刀侧铣加工组合曲面圆弧过渡区域的新方法。首先建立环形刀的几何模型,通过调整刀具姿态角,使刀具表面和工件表面在不发生干涉的条件下实现密切接触。通过迭代判断使下行刀轨的驱动线和当前刀轨在精度范围内搭接,实现刀轨的合理编排。最后,以某航空发动机叶片为例计算了刀轨。结果表明,该算法能够精确地加工出圆弧过渡曲面,刀轨之间的没有明显的残高,加工效率较球头刀提高了5倍。
Based on the principle of global curvature fitting ,a novel torus cutter was proposed to flank milling the circular blending area of combined surfaces ,First ,the geometry model of the torus tool was established ,by adjusting tool orientation to make the tool contact the theoretical workpiece surface closely without gouging .Then the left characteristic parameter curve of the next path was made being collinear with the right characteristic parameter curve of the current path by iterative computation .Finally ,the tool paths were completely arranged .The machining simulation and machining experiment on an aero engine blade was carried out .The results illustrat that the proposed method could greatly improve the machining quality of the circular blending area ,and could generate smoothness tool path without gouging .Compared with the traditional algorithm of ball-end milling ,the machining efficiency was impoved five times .
出处
《机械工程与自动化》
2014年第1期121-123,共3页
Mechanical Engineering & Automation
基金
国家自然科学基金资助项目(51075021)
关键词
环形刀
广域曲率吻合
圆弧过渡
torus cutter
global curvature fitting
circular blending surfaces
