一种半空心螺纹铆钉，包括：一体成形的铆钉头和空心结构的铆钉体，该铆钉体从下而上依次包括：流钻部、攻丝部和螺纹部，其中：流钻部和攻丝部位于空心结构的外缘，流钻部的底端为楔形锥角。本发明通过攻丝与拧紧实现螺纹连接，最终形成螺纹‑固相复合连接；铆接完成后，铆钉尖端未刺穿下层板材，保证了接头的密封性，提升抗腐蚀能力；由于下层板无尖锐凸起，使该工艺可以用于型材外其他类型的连接，扩大了工艺的应用范围。

A semi-hollow threaded rivet, comprising: an integrally formed rivet head and a rivet body with a hollow structure. The rivet body includes, from bottom to top, a flow drill part, a tapping part and a thread part, wherein: flow drill part and tapping part The part is located at the outer edge of the hollow structure, and the bottom end of the flow drill part is a wedge-shaped cone angle. The invention realizes threaded connection through tapping and tightening, and finally forms a thread-solid phase composite connection; after the riveting is completed, the tip of the rivet does not pierce the lower plate, which ensures the sealing performance of the joint and improves the corrosion resistance; because the lower plate has no sharp protrusions As a result, the process can be used for other types of connections outside the profile, and the application range of the process is expanded.