摘要
航空航天构件装配过程中需要进行大量沉头孔的加工,其中,沉孔深度是需要精确控制的关键技术指标,对构件装配质量有着重要影响。螺旋铣孔是近些年出现的装配制孔新方法,配合特制刀具也可以用于沉头孔的加工。基于现有的便携式螺旋铣孔设备,提出了一种沉头孔加工深度自动控制方法。首先搭建了螺旋铣孔试验平台,分析了加工过程中的误差来源;然后通过理论分析和开展对刀接触力测量试验,建立了接触力与进给电机转矩值之间的函数关系,并进一步确定了使用铣锪一体刀具加工时的优选对刀参数;最后,在钛合金试件上进行了自动对刀及锪窝加工试验,并对窝深进行测量。结果表明,加工后的沉头孔深度误差控制在0.05 mm以内,满足构件的设计精度要求。
The assembly process of aerospace components involved the machining of a large number of countersunk holes,with the depth of the countersunk holes being a critical technical parameter that required precise control,significantly impacting the quality of component assembly.Helical milling was a new method for drilling assembly holes that had emerged in recent years,and when combined with specialized tools,it could also be used for the machining of countersunk holes.Based on existing portable helical milling equipment,this paper proposed an automatic control method for the depth of countersunk hole machining.First,a spiral milling test platform was established to analyze the sources of error during the machining process.Then,through theoretical analysis and tool contact force measurement experiments,a functional relationship between the contact force and the feed motor torque value was established,and the optimal tooling parameters for machining with a milling and countersinking integrated tool were further determined.Finally,automatic tooling and countersinking machining experiments were conducted on titanium alloy test pieces,and the countersink depth was measured.The results show that the depth error of the countersunk holes after machining is controlled within 0.05 mm,meeting the design accuracy requirements of the components.
作者
冷晓寒
杨国林
康仁科
魏金花
孙新
LENG Xiaohan;YANG Guolin;KANG Renke;WEI Jinhua;SUN Xin(State Key Laboratory of High-Performance Precision Manufacturing,Dalian University of Technology,Dalian 116024;Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)
出处
《宇航材料工艺》
北大核心
2025年第4期47-53,共7页
Aerospace Materials & Technology
基金
兴辽英才计划(XLYC2001004)
中央高校基本科研业务费资助(DUT22LAB501)。
关键词
沉头孔
锪窝
螺旋铣孔
装配
制孔深度
Counterbore
Lamage
Helical milling
Assembly
Hole depth
作者简介
第一作者:冷晓寒,1997年出生,硕士研究生,主要从事航空航天构件制孔技术研究的工作。Email:xhan2023@163.com。
