钛合金导管内径滚压连接技术主要用于飞机液压管路系统中,具有耐高压和高密封性,能够提升飞机液压管路系统的高可靠性能,满足飞机轻量化和长寿命的需求,成为航空管件连接技术的首选方案.本文以理论分析、有限元模拟和试验相结合的方法,从导管滚压连接胀形器各组件的运动状态、接触状况、受力分析以及管材节点位移变化等方面,探讨了基于扭矩控制的导管内径滚压连接成形机理及特征.研究表明,成形过程中芯轴主动转动,滚柱带动保持架周向随动转动;芯轴与滚柱之间有较大的径向挤压力和切向摩擦力,在这两个力的合力作用下,产生轴向进给力,使芯轴自动进给,导管、滚柱和芯轴之间接触面和接触力逐渐增大,成形扭矩随之增加,导管材料逐渐嵌入管套凹槽,完成连接成形,这是扭矩控制的导管内径滚压连接机理所在.理论分析与有限元模拟及试验结论吻合较好,研究结果对工程应用中的质量控制和工艺优化具有一定的指导作用. Titanium alloy pipe diameter roller connection technology is mainly used in aircraft hydraulic piping system, with high pressure and high tightness, can improve the high reliability of aircraft hydraulic piping system to meet the requirements of aircraft light weight and long life, become aviation The first choice of pipe connection technology.In this paper, the theoretical analysis, the combination of finite element simulation and test methods, from the catheter rolling connection bulge each component of the movement status, contact conditions, stress analysis and pipe joints displacement changes, The forming mechanism and characteristics of the pipe inner diameter roll connection based on torque control are discussed.The research shows that the mandrel rotates actively in the forming process and the roller drives the cage to rotate circumferentially with a large radial squeeze between the mandrel and the roller Pressure and tangential friction, in the force of these two forces, resulting in axial feed force, the mandrel is automatically fed, the catheter, roller and mandrel contact surface and contact force gradually increased, forming As the torque increases, the catheter material is gradually embedded in the groove of the sleeve to complete the connection forming, which is the mechanism of torque control of the inner diameter of the catheter. The theoretical analysis, the finite element simulation and the experimental results Good agreement, the findings have some guidance on quality control and process optimization engineering applications.