Automatic positioning disc replacing tool for plastic wire disc machining

The invention is applicable to the technical field of plastic wire coil processing, and provides an automatic positioning and coil changing tool for plastic wire coil processing, which comprises a main body assembly, the main body assembly comprises a workbench, and the top of the workbench is provided with a coil changing assembly, a clamping assembly, a welding station and a polishing station; according to the device, the problem that the use mode of an existing positioning and disc changing mechanism cannot be compatible with welding and grinding machining operations is solved, the tool limits the upward moving stroke of a workpiece through cooperation of a positioning telescopic rod and a positioning column, the workpiece can be conveniently welded, and the workpiece can be conveniently and rapidly welded. The position of the positioning column is locked through the lock catch, then the workpiece is kept static, the two swing arms are matched with the corresponding bosses, the two side plates of the workp