砂布轮柔性抛光力的建模与参数优化

砂布轮柔性较大可以实现航空发动机叶片微面切触自适应抛光，提高叶片表面完整性和力学性能。抛光力是影响抛光表面完整性的关键参数，通过单因素试验分析确定了砂布轮抛光力的影响参数及其影响规律，通过正交试验和极差法确定了影响抛光力的主要参数是砂布轮的压缩量和转速；利用二元二次回归正交试验得出了抛光力的预测模型，利用该模型分析了抛光力预测误差变化趋势，明确了不同转速下抛光力主要影响参数的稳定域；整体叶盘的抛光试验表明：通过合理控制抛光力，可以实现表面粗糙度小于0.4 μm的抛光效果，且效率比人工提高20%。

Modelling and parameter optimization of flexible polishing force for abrasive cloth wheel

Abrasive cloth wheel with large flexibility can realize micro-surface contact and adaptive polishing to improve the surface integrity and mechanical properties of the aero-engine blade. Because the polishing force is the key parameter influencing the integrity of polishing surface, influence parameters for polishing force of abrasive cloth wheel are determined and its influence regularities are analyzed by single-factor experiment. The compression size and the rotation speed of abrasive cloth wheel are determined as the main influence parameters for the polishing force by the orthogonal experiment and range analysis. Prediction model of the polishing force is obtained by using binary quadratic regression orthogonal experiment. The variation trend of the polishing force prediction error is analyzed by using the model, and the stability domain of the main influence parameters is determined at different rotation speeds. The results of blisk polishing experiment show that the ideal polishing results of surface roughness less than 0.4 μm and polishing efficiency higher by 20% than manual polishing can be achieved by reasonable control of the polishing force.