When applied to blisk blade profile polishing of aero-engines, “five-axis NC + flexible grinding head + elastic grindstone” polishing technological equipment has advantages of high precision, minor interference, favorable adaptivity, etc. In order to improve the polishing quality and polishing efficiency, a mathematical calculation formula of polishing efficiency was established according to the polishing principles of elastic grindstone (sanding wheel). The optimized combination of technological parameters (ω = 6000 r/min, a_p = 0.9 mm, v_f = 320 mm/min) was obtained through the range method of orthogonal test results with double optimization objectives—surface roughness and polishing efficiency. Based on the relationship between number of polishing times and surface roughness, a technological program was put forward, that is, polishing is firstly conducted using 320^# sanding wheel for 6 times and then 400^# sanding wheel for 9 times (totally 15 times) under the optimized combination of technological parameters, then surface roughness less 0.4 μm can be achieved. Blade polishing test results indicate that: efficiency-optimized technological parameters can not only significantly shorten polishing time but also acquire qualified blade surface roughness less 0.4 μm, thus verifying reliability of the optimization method and results.

“五轴数控+柔性磨头+弹性磨石”抛光工艺装备应用于航空发动机整体叶盘叶片轮廓抛光时，具有精度高、干涉小、适应性好等优点。抛光效率，根据弹性磨石（砂轮）的抛光原理，建立了抛光效率的数学计算公式。通过正交试验结果极差法，以表面粗糙度和抛光效率双优化目标，得到_{优化的工艺参数组合（ω=6000r/min、ap =} 0.9mm 、 vf = 320mm / min）。根据抛光次数与表面粗糙度的关系，提出了先用320 ^#砂轮抛光6次，再用400 ^#砂轮抛光9次（共15次）的工艺方案。通过工艺参数的优化组合，可实现表面粗糙度小于0.4μm。叶片抛光试验结果表明：效率优化后的工艺参数不仅可以显着缩短抛光时间，而且可以获得小于0.4μm的合格叶片表面粗糙度，验证了优化方法和结果的可靠性。