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针对某40Cr Ni Mo A/玻璃纤维增强塑料(GFRP)航空叠层复合材料构件连接孔的制孔质量差和加工效率低的问题,提出了超声振动辅助螺旋铣削制孔新工艺。分析了超声振动辅助螺旋铣削制孔方法的刀具运动轨迹,给出了超声振动有效加工的振幅范围,在相同的切削速度与加工效率下,分析比较了3种不同工艺方法的切削力、切削温度及制孔质量。试验结果表明:相对普通螺旋铣削与钻削,超声振动辅助螺旋铣削加工40Cr Ni Mo A材料时切削力分别降低25%和40%,最高切削温度降低15.7%和22%;加工GFRP材料时,最高切削温度降幅分别为16.5%和50%,且孔出口撕裂、毛刺等缺陷明显减少,达到制造要求。
In order to solve the problem of poor hole quality and low processing efficiency in the connection holes of a 40Cr Ni Mo A / GFRP laminated composite component, a new ultrasonic drilling technique was proposed. The trajectory of the cutter used in ultrasonic vibration assisted helical milling is analyzed. The effective range of ultrasonic vibration is given. Under the same cutting speed and processing efficiency, the cutting force, cutting temperature And the hole quality. The results show that the cutting force is reduced by 25% and 40%, respectively, and the maximum cutting temperature is reduced by 15.7% and 22% compared with ordinary helical milling and drilling. Ultrasonic vibration assisted helix milling 40Cr Ni Mo A material has the highest cutting temperature of 15.7% and 22% Cutting temperature drop of 16.5% and 50%, respectively, and the hole outlet tear, burr and other defects significantly reduced to meet the manufacturing requirements.