Safety improving technology for finish machining of wing-fuselage joints

To avoid the security problem of finish machining of wing-fuselage joints, a safety improving method for finish machining of wing-fuselage joints during digital final assembly of aircraft is studied in this paper. Before formal cutting process, automatic accurate three-coordinate measurement of wing-fuselage joints is performed on spot by machining center with a touch trigger probe installed in the spindle. A cutting allowance evaluation model of wing-fuselage joint hole is put forward based on its measured data. If some wing-fuselage joints do not meet the security condition of finish machining, the fuselage posture must be realigned.