System with double inner liquid spraying tool cathodes and electrolytic grinding and milling method of system with double inner liquid spraying tool cathodes

The invention relates to a system with double inner liquid spraying tool cathodes and an electrolytic grinding and milling method of the system with the double inner liquid spraying tool cathodes and belongs to the field of electrolytic grinding composite machining. A machine tool main shaft drives two hollow transmission shafts to rotate through a transmission straight gear set so that rotating connector inner rings at the top ends of the transmission shafts and water stopping chucks at the tail ends of the transmission shafts can be driven to rotate at the same time. The tool cathodes of different design requirements can be clamped on the water stopping chucks. Rotating connectors input electrolyte into a dynamic rotating system from a static system, and the electrolyte is directly jetted to a machined surface of a workpiece through transmission shaft through holes and tool cathode inner holes. In this way, complicated thin-wall structures, symmetrical molded faces and the like can be machined in an inner liquid spraying electrolytic grinding and milling manner through a main shaft transmission device, the machine tool main shaft is free of influences of electrolyte corrosion, the machining allowance difference is reduced, the machining depth is increased, and the machining precision, the machining efficiency and the machining flexibility are improved.