一种半空心铆钉及其无预制孔铆接装置及方法，包括：半空心铆钉、驱动头和平面支撑机构，驱动头通过凸台与半空心铆钉顶部的凹槽相啮合并共同位于待连接板的上方，平面支撑机构位于待连接板的下方；驱动头的凸台与铆钉盖中央的凹槽具有相同锥度以实现铆钉的轴向进给运动和旋转运动。本发明无需预制孔，避免板材之间由于预制孔错位、铆钉与预制孔同轴度和垂直度难以保证而带来的铆接质量问题；摩擦热作用下铆钉和板材以及板材和板材之间形成了固相连接，机械连接与固相连接的复合显著提高了接头的性能；半空心铆钉沿轴向旋转进给过程中摩擦产热软化了待连接材料，有助于减小铆接力，降低对铆接设备吨位的需求；半空心铆钉与平面支撑机构之间无对中性要求，适用于大型薄壁件的高柔性、高可靠性装配。

A semi-tubular rivet and its non-prefabricated riveting device and method, comprising: a semi-tubular rivet, a driving head and a plane support mechanism. The driving head engages with the groove on the top of the semi-tubular rivet through a boss and is located on the plate to be connected together. Above, the plane support mechanism is located below the plate to be connected; the boss of the driving head and the groove in the center of the rivet cover have the same taper to realize the axial feed movement and the rotation movement of the rivet. The present invention does not require prefabricated holes, and avoids the riveting quality problems caused by the dislocation of the prefabricated holes between the plates and the difficulty in guaranteeing the coaxiality and perpendicularity of the rivets and the prefabricated holes; the rivet and the plate and the plate and the plate are formed under the action of frictional heat. Solid phase connection, the combination of mechanical connection and solid phase connection significantly improves the performance of the joint; the friction and heat generated by the semi-tubular rivet during the axial rotation and feeding soften the material to be connected, which helps to reduce the riveting force and reduce the butt riveting Equipment tonnage requirements; there is no requirement for neutrality between the semi-tubular rivet and the plane support mechanism, which is suitable for the high flexibility and high reliability assembly of large thin-walled parts.