The flareless internal rolling technology is an important technology in the hydraulic pressure system. The technology has high sealing performance and connection strength. So it has been used widely in the aeronautical area meeting for the reliable requirement. For the internal rolling tube joint of Ti alloy

the connection strength is generated because of the common action of radial contact force and axial pull-off strength between tube and sleeve. The influence regularity of sleeve structure to connection strength is catched. Deepening the depth of sleeve beard can increase the connection strength. If the width is over wide

which can inhibit the tube embedding in sleeve and reduce the connection strength. It is instructive to increase the reliable performance for hydraulic pressure system of plane.