BOLTED JOINT Russian patent published in 1994 - IPC

FIELD: aircraft manufacture. SUBSTANCE: bolted joint has countersunk cone-headed bolt which is an interference fit in hole of part stack with taper seat for bolt head. Bolt is made of material whose hardness is higher than that of material of parts. On taper surface of bolt head there is circular projection with cross-section in form of segment. Segment has radius R = (0.036 - 0.06)d and height h = (0.018 - 0.3)d, where d is nominal diameter of bolt shank. Segment may be truncated by chord located at angle of 0 to 10 deg to axis of bolt head. EFFECT: reduction of force required for pressing projection into surface of taper seat and tight faying of bolt head to surface of seat. 2 cl, 3 dwg