温度对CFRP/Ti叠层构件螺旋铣孔亚表面质量的影响

Effect of Temperature on Subsurface Quality During Helical Milling CFRP/Ti Stracks

为研究CFRP/Ti叠层构件螺旋铣孔加工时切削温度对亚表面质量的影响,采用CFRP孔下方有无钛合金的两种加工方式,对比分析两种加工方式加工时的切削温度,研究切削温度对CFRP亚表面损伤的影响。结果表明:孔下方有钛合金时CFRP孔出口处切削温度大幅度升高(与单独加工CFRP相比,温度升高了25℃,提高了20%);孔下方有钛合金时CFRP的亚表面最大损伤深度达到了54.7μm(比无钛合金的CFRP相比高了17%)。高切削温度导致CFPR性能下降,使得CFRP孔出口附近纤维层上出现了严重的亚表面损伤。因此,CFRP/Ti叠层构件螺旋铣孔过程中切削温度对CFRP孔亚表面质量具有显著影响,并且亚表面损伤是反映CFRP加工质量的重要因素。

In order to investigate the effect of cutting temperature on the subsurface quality during helical milling CFRP/Ti stacks,two machining strategys with or without Ti under CFRP hole were compared,and the effect of cutting temperature on the subsurface damage of CFRP was analyzed.The results show that cutting temperature at the exit of CFRP hole is greatly increased when Ti under the hole(compared with the machining of CFRP alone,the temperature is increased by 25℃and increased by 20%).The maximum subsurface damage depth of CFRP with Ti under the hole is 54.7μm(17%higher than that of CFRP without Ti).Due to this high temperature,the property of the CFRP resin base decline,which causes serious subsurface damage to the fibre layers close to the hole outlets.Therefore,the cutting temperature has a significant effect on the subsurface quality of CFRP holes in helical milling CFRP/Ti stacks,and the subsurface damage is an important factor reflecting the machining quality of CFRP.