磨粒排布对加压内冷却砂轮磨削性能的影响

摘要

In view of the effect of the abrasive arraying forms on the grinding efficiency and performance,the pressurized internal-cooling grinding wheels with random or ordered abrasive are designed and prepared.Based on the surface morphology detection technology and image identification technology,the 3D finite element model for grinding superalloy GH4169 is established.The grinding experiments of superalloy GH4169 are performed by adopting the prepared wheels,the effects of the abrasive arraying forms on the grinding performance are revealed,grinding force,temperature,machined surface roughness and surface topography are studied.The results show that:compared with the wheel with random abrasive,wheel with ordered abrasive leads to better machined surface quality,smaller grinding force,lower grinding temperature and surface roughness,moreover cleaner surface morphology.%考虑磨粒排布方式对砂轮磨削效率和性能有重要影响,设计制备磨粒无序和有序排布的加压内冷却砂轮,利用砂轮表面形貌检测和图像识别技术,建立砂轮磨削GH4169高温合金的三维有限元模型.采用不同磨粒排布的砂轮开展磨削GH4169高温合金的实验研究,对比分析磨削力、磨削温度、加工表面粗糙度以及表面微观形貌,研究磨粒无序和有序两种排布方式对砂轮磨削性能的影响.结果表明:对于加压内冷却砂轮而言,相对磨粒无序排布,磨粒有序排布方式能获得更优良的加工表面质量,磨削力、磨削温度和表面粗糙度均降低,且工件表面形貌更加规则完整.