碳纤维复合材料铣削与磨削加工对比研究

使用单层钎焊金刚石磨头和金刚石涂层玉米铣刀对T800碳纤维增强环氧树脂复合材料层压板进行切边加工，研究铣削加工和磨削加工工艺对碳纤维增强复合材料(carbon fiber reinforced plastics，CFRP)表面质量的影响。通过对加工表面微观形貌的观察和表面粗糙度的测量对比，讨论2种加工方式下表面质量差异和缺陷形成的原因。结果表明:磨削加工的表面质量优于铣削加工的表面质量，铣削加工后CFRP表面会出现凹坑和树脂涂覆等缺陷，但磨削加工的表面纤维断口清晰可见，无明显缺陷。铣削工艺下的凹坑是纤维集束断裂而形成的，树脂涂覆是由刀具后刀面与工件材料的频繁挤压、摩擦而形成。在表面质量和加工缺陷要求严格的条件下，应优先选用磨削加工工艺。 

Comparative study on machining of CFRP by end mill and abrasive router

In order to study the influence of milling and grinding process on the machining quality of CFRP (carbon fiber reinforced plastics), the single-layer brazed diamond abrasive router and diamond coated end mill were used during the trimming experiment of T800 carbon fiber reinforced plastics. The difference of the machining quality and occurrence of defects were discussed according to the observation of micro topography and measurement of surface roughness. The results show that surface quality under abrasive machining process is much better than that of milling process. Great pits and resin smearing are observed after milling process, while the section of carbon fiber is visible under abrasive machining process. The discussion shows that the fracture of carbon fiber bundles contributes to the formation of great pits and the continual reaction between flank face and finished surface lead to the occurrence of resin smearing. Grinding is the preferred machining process under the strict requirements for surface quality and processing deficiency.