Hydraulic device capable of achieving rapid square expansion

The utility model relates to the field of sheet metal processing, in particular to a hydraulic device capable of realizing rapid square expansion, which comprises a guide table, a die core which is arranged on the guide table and ascends and descends along the axial direction, a plurality of die petals are arranged on the guide table in a sliding manner around the die core, and all the die petals simultaneously slide along the guide table to be close to or far away from the die core. The mold core is always in sliding connection with the mold petals; according to the utility model, the purpose of changing the expanding size of a workpiece can be achieved by adopting the reset sensor and the expanding limiting sensor, and the final expanding size is changed by adjusting the relative positions of the die petals, so that compared with the traditional one-to-one design, a large amount of cost is saved, the production efficiency is also improved, and the applicability is stronger. 本实用新型涉及钣金加工领域，具体涉及一种可实现快速胀方的液压装置，