碳纤维增强复合材料低温冷风磨削试验研究

采用SD80N100B金刚石砂轮开展了单向碳纤维复合材料的低温冷风磨削与常温干式磨削的对比试验研究，探讨了低温冷风与磨削参数对碳纤维复合材料磨削性能的影响。采用扫描电镜与超景深电子显微镜观察了磨削后的表面形貌和亚表面损伤情况，并分析了表面粗糙度的影响规律。试验结果表明：与常温干式磨削相比，低温冷风磨削的磨削力增大，表面粗糙度减小;在低温冷风和常温干式两种磨削方式下，纵向90°磨削较其他磨削方向的磨削力更大，表面粗糙度更小。

Experimental Study on Cryogenic Cold Air Grinding of Carbon Fibre Reinforced Plastics

Cryogenic cold air and dry room temperature grinding experiments were carried out for unidirectional CFRP using SD80N100B diamond wheel. The influences of cryogenic cold air and grinding parameters on material grinding performance were discussed. The morphologies of ground surface and sub-surface damage were observed by scanning electron microscope and ultra-depth field optical microscopy and factors influenced on surface roughness were analyzed. The results show that, compared with dry grinding conditions, cryogenic cold air grinding results in larger grinding force, lower surface roughness. Under cryogenic cold air and dry room temperature grinding conditions, the maximum grinding force and minimum surface roughness are obtained when ground surface perpendicular to the fibres lengthen direction.