Hydraulic press (a kind of hydraulic press) is a kind of hydraulic press that uses special hydraulic oil as the working medium, hydraulic pump as the power source, and uses the force of the pump to make the hydraulic oil enter the oil cylinder/piston through the hydraulic pipeline. Then there are several groups of matched seals in the oil cylinder/piston. The seals at different positions are different, but they can all play the role of sealing, so that the hydraulic oil cannot leak. Finally, the hydraulic oil is circulated in the oil tank through the check valve to make the oil cylinder/piston circulate and work so as to complete certain mechanical actions as a kind of machinery for productivity.

The hydraulic presses are mainly classified into four column hydraulic presses (three beams and four columns, five beams and four columns), double column hydraulic presses, single column hydraulic presses (C-type structure), frame hydraulic presses, etc.

According to the use classification of hydraulic press, it can be divided into metal forming hydraulic press, bending hydraulic press, stretching hydraulic press, blanking hydraulic press, powder (metal, non-metal) forming hydraulic press, press mounting hydraulic press, extrusion hydraulic press, extrusion molding, etc. Of course, ordinary hydraulic press can also be upgraded to servo hydraulic press