Metal stud welding system combined with friction heat source

The invention relates to a metal stud welding system, and in particular relates to a metal stud welding system combined with a friction heat source. A stud outer ring is directly driven by the axial displacement of the stud outer ring and a rotation device to move up and down and rotate, so as to achieve the large-area auxiliary friction pre-heating between the stud outer ring and a metal substrate, thereby increasing the total heat input for welding; the metal stud is directly driven by the axial displacement of the stud and a rotation device to move up and down and rotate so as to generate heat by rotation friction; the temperatures of the metal stud and the metal substrate respectively reach the solid-phase welding temperature range of a contact surface material due to the friction heat between the stud outer ring and the metal substrate, and between the metal stud and the metal substrate; and a stud chuck is driven to upset the metal stud so as to achieve the friction welding of the metal stud. The metal stud welding system can improve the effective welding area of metal studs, in particular to a large-diameter stud, enhance the interface bonding strength and the deformation resistance, and improve the metal stud welding efficiency and the like.