超低温冷却对碳纤维增强复合材料铣制孔作用研究

Study on Effect of Ultra Low Temperature Cooling on Milling Holesin Carbon Fiber Reinforced Composite Materials

碳纤维增强复合材料因高比强度、良好的耐腐蚀性能被广泛应用于航空航天等军工领域,但在进行二次加工时往往产生诸如分层、撕裂、啃边等缺陷。为了探究超低温冷却对碳纤维增强复合材料(CFRP)铣制孔的作用规律,克服制孔时所产生的加工缺陷,对CFRP材料进行螺旋铣制孔加工实验,对比分析干切削和超低温切削下孔的加工质量。结果表明:相对于干铣孔,超低温冷却抑制了CFRP孔入口毛刺以及出口分层缺陷,提高了铣孔力,说明超低温冷却方式对于提高CFRP铣制孔可加工性能、抑制铣制孔缺陷具有积极作用。

Carbon fiber reinforced composite materials are widely used in military industries such as aerospace due to their high specific strength and good corrosion resistance.However,many defects such as delamination,tearing,and edge gnawing often occur during secondary processing.In order to investigate the effect of ultra-low temperature cooling on milling holes in carbon fiber reinforced composite materials(CFRP)and overcome the processing defects caused by hole making.Spiral milling experiments were conducted on CFRP materials to compare and analyze the machining quality of holes under dry cutting and ultra-low temperature cutting.The results show that,compared to dry milling holes,ultra-low temperature cooling suppressed the burrs at the inlet and delamination defects at the outlet of CFRP holes,and improved the milling force.The ultra-low temperature cooling method has a positive effect on improving the machinability of CFRP milling holes and suppressing milling hole defects.