CFRP/钛合金叠层材料螺旋铣孔变参数试验研究

Experimental Research on Variable Parameters of Helical Milling Hole for CFRP/Titanium Alloy Stacks

采用参数递减变化和往复变化两种加工方法对CFRP/钛合金叠层材料进行螺旋铣孔试验研究。试验从孔壁表面粗糙度、孔径误差、CFRP分层损伤等方面分析了两种变参数方法对叠层材料制孔的影响,并对优化后的不变参数和变参数的加工结果进行了对比分析。结果表明,在加工参数递减变化时,减小变参数区域的长度和参数改变次数有利于提高制孔质量,加工参数先减小再增大的变参数螺旋铣孔工艺,有利于减小叠层区域的轴向力和切削温度,从而提高制孔质量。

The two processing methods of decreasing parameter and reciprocating variation are adopted to study helical milling experiments on CFRP/titanium alloy stacks.The effect of two variable parameter methods on the stacks are analyzed from the surface roughness of the hole wall, the aperture error and the CFRP delamination damage, and the processing results of the optimized parameters and the variable parameters are compared and analyzed.The experimental results show that decreasing the length of the variable parameter area and changing the number of parameters will improve the quality of the hole when the machining parameters decrease.The variable parameter helical milling hole technology, which reduces the machining parameters first and then increases, is conducive to reducing the axial force and cutting temperature in the laminated area, thereby improving the quality of the holes.