Multi-station three-dimensional vertical engraving and milling machine based on mechanical automatic turnover and turnover method

The invention relates to the technical field of engraving and milling machines, in particular to a multi-station three-dimensional vertical engraving and milling machine based on mechanical automatic overturning and an overturning method. Comprising a base, a universal overturning module arranged on the base and a clamping mechanism arranged at the overturning end of the universal overturning module. The universal overturning module is provided with an auxiliary overturning ring capable of transversely swinging left and right and used for adjusting the angle of the clamped workpiece. A mimicry jacking and supporting device is further arranged under the universal overturning module and provided with a plurality of sets of jacking and supporting rods and a locking disc used for synchronously locking the multiple sets of jacking and supporting rods, and in the jacking and supporting state, the multiple sets of jacking and supporting rods synchronously and axially move upwards and are flexibly attached to the low