Qiaotian provides the QT-650 robot tool changer and supporting solution: a unified robot-side interface connects multiple handling grippers and spot welding guns, enabling synchronous changeover of mechanical, pneumatic, electrical, communication, and safety circuits. The tool changer body adopts a QT-650 robot-side + tool-side configuration, adapting to the vast majority of tool loads in welding workshops. For communication and control, combinations such as the C39 communication module and F25-7 control module support stable transmission of signals and control circuits, reducing human error, signal reconnection wait times, and line downtime risks. High-power electrical and servo modules are optionally configured according to welding gun requirements, meeting the media connection needs of spot welding guns while accommodating future welding process and vehicle model upgrades. Pneumatic and parking modules make on-site tool parking, re-pickup, and repeated docking more stable, reducing maintenance frequency and time. In terms of safety design, the system maintains locking even during air or power loss, achieving up to PLd/Cat.3 safety level, meeting the automaker's welding line requirements for safety circuits, continuous production, and equipment reliability. The solution uses a standardized body to support a multi-tool platform, with optional modules adapting to different energy interfaces. On-site service ensures efficient implementation, helping the customer upgrade from "tool switching" to "flexible manufacturing capability" and reserving space for future vehicle model introduction and production line replication.