Research progress on exit burr in drilling assembly hole of aerospace aluminum alloy components

Abstract

There is a large demand for aluminum alloy assembly hole machining in aerospace manufacturing industry. The assembly hole is mainly realized by drilling, and there is a problem that the aluminum alloy exit burr is too large in the processing. The exit burr directly affects the accuracy, fatigue strength and assembly performance of the workpiece. The deburring process will greatly increase the man hour and cost. Therefore, it is necessary to study the exit burr of aluminum alloy assembly hole drilling to realize the control of exit burr. This paper systematically discusses the types, measurement methods, formation mechanism, height prediction and gross control methods of exit burr in aluminum alloy drilling, in order to provide help for the research of exit burr in aluminum alloy drilling.

Keywords

• aluminum alloy
• drilling
• exit burr
• formation mechanism
• control method