摘要
4J29可伐合金由于具有和奥氏体不锈钢相近的难切削特点,传统钻削制孔质量较差,为了研究4J29可伐合金制孔质量的影响因素,提高制孔质量,对4J29合金进行了不同加工参数下的普通钻削和超声振动辅助钻削试验并对钻削轴向力、孔径误差、孔壁粗糙度进行了测量。试验发现:4J29可伐合金在不同加工参数下(切削速度v=0.314~0.942m/s,进给速度f=10~30mm/min),超声振动辅助钻削可降低钻削轴向力,轴向力平均降低35.37N,降幅为18.45%;超声振动辅助钻削可提高制孔精度,孔径误差平均减小17.9μm,降幅为31.5%;超声振动辅助钻削可提高表面质量,对于轮廓算术平均偏差Ra,超声振动辅助钻削使其平均降低了0.4862μm,降幅为28.4%,微观不平度十点高度Rz平均降低了2.4940μm,降幅为20.0%。试验表明超声振动钻削4J29可伐合金比传统钻削加工更具优势,可获得质量更高的加工孔。
Due to the 4J29 Kovar alloy’s similar character of difficulty to be cut with austenitic stainless steel,the quality of holes obtained by traditional drilling is poor.In order to study the factors affecting the quality of 4J29 Kovar alloy drilling and improve the quality of drilling,traditional drilling and ultrasonic vibration-assisted drilling experiments of 4J29 alloy under different processing parameters were carried out,and the drilling axial force,hole diameter error and hole wall roughness were measured.It is found that under different processing parameters(cutting speed v=0.314–0.942m/s,feed speed f=10–30mm/min),ultrasonic vibration-assisted drilling can reduce the drilling axial force by about 18.45%,with an average decrease of 35.37N.Ultrasonic vibration-assisted drilling can improve drilling accuracy,and the average hole diameter error is reduced about 17.9μm,with a decrease by 31.5%.Ultrasonic vibration-assisted drilling can improve surface quality.For the arithmetic mean deviation Ra of contour,ultrasonic vibration-assisted drilling reduces the average surface quality by about 28.4%,which is 0.4862μm,and the average maximum contour height Rz is decreased by 20.0%(about 2.4940μm).The experiments have shown that ultrasonic vibration-assisted drilling of 4J29 Kovar alloy has more advantages than traditional drilling,and can contribute to higher quality drilling holes.
作者
刘春青
康仁科
李志远
董志刚
邹明虎
王文汉
杨强强
LIU Chunqing;KANG Renke;LI Zhiyuan;DONG Zhigang;ZOU Minghu;WANG Wenhan;YANG Qiangqiang(AVIC Xi’an Flight Automatic Control Research Institute,Xi’an 710065,China;Key Laboratory for Precision and Non-Traditional Machining Technology,Ministry of Education,Dalian University of Technology,Dalian 116024,China;The PLA of 65183 Army,Liaoyang 111200,China)
出处
《航空制造技术》
2019年第16期94-101,共8页
Aeronautical Manufacturing Technology
关键词
4J29合金
超声振动辅助钻削
轴向力
孔质量
孔径误差
粗糙度
4J29 alloy
Ultrasonic vibration-assisted drilling
Thrust force
Quality of hole
Hole error
Roughness
