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摘要: 叶缘作为航空发动机叶片的关键部位,其加工精度直接影响叶片的气动性能,降低叶缘表面粗糙度和轮廓度对提高发动机服役寿命至关重要。为此本文设计并开发了固结金刚石抛光轮,基于机器人平台研究叶片叶缘的抛光工艺。采用正交试验法探索4个主要工艺参数(主轴转速、进给速度、加工压力、磨料粒径)对叶缘表面粗糙度以及轮廓度的影响规律。试验确定最佳的工艺参数组合:主轴转速为800 r/min、进给速度为6 mm/min、加工压力为4 N、磨料粒径为10~14 μm。以此参数组合抛光后工件光整效果较好,表面形貌得到改善,面型精度提高,叶缘的表面粗糙度由初始的1.165 μm降为0.243 μm ,轮廓度由初始的0.048 mm降为0.016 mm,满足使用要求。Abstract: As a crucial area of aircraft engine blades, the precision of the blade edge directly affects the aerodynamic performance of the blades. Reducing the surface roughness and improving the contour of the blade edge are crucial for enhancing the engine's service life. Therefore, this study designed and developed resin-bonded diamond polishing wheels, investigating the polishing process of blade edges based on a robotic platform. Orthogonal experimental design was employed to explore the impact of four main process parameters (spindle speed, feed rate, processing pressure, abrasive particle size) on the surface roughness and contour of the blade edge. The experiments determined the optimal combination of process parameters: spindle speed at 800 r/min, feed rate at 6 mm/min, processing pressure at 4 N, and abrasive particle size ranged between 10 to 14 μm. With this parameter combination, the polishing effect on the workpiece was significantly improved. The surface morphology was enhanced, the surface roughness of the blade edge decreased from the initial 1.165 μm to 0.243 μm, and the contour reduced from the initial 0.048 mm to 0.016 mm, meeting the usage requirements.
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