The drive system of hydraulic press mainly has two types: pump direct drive and pump accumulat drive. The pump direct drive provides high-pressure working fluid tothe hydraulic cylinder, the valve is used to change the direction of the liquid supply, and the relief valve is used to adjust the limited pressure of the system, while playing a safe overflow role. This drive system links less, simple structure, pressure can automatically increase and decrease according to the required working force which reduces the power consumption, but the pumpand its driving motor capacity must be determined by the hydraulic press’s maximum working force and the highest speed. This type of drive system is mainly used in small and medium-sized hydraulic press, but also has large (such as 120000 kn) free forging hydraulic pressdriven directly by pump.
Pump-accumulator drive One or a group of accumulators in this drive system. When the high pressure working liquid supplied by the pump has a surplus, stored by the accumulator; When the supply is insufficient, it is replenished by the accumulator. Using this system can choose the capacity of pump and motor according to the average amount of high pressure working fluid, but because the pressure of working fluid is constant, the power consumption is large, and the system has many links, the structure is more complex. This drive system is mainly used for large hydraulic press, or a set of drive system to drive several hydraulic press.
The structure form is mainly divided into: four column type, single column type (C), horizontal, vertical frame, universal hydraulic press. According to the use, it is mainly divided into metal forming, bending, stretching, punching, powder (metal, non-metal) forming, pressing, extrusion, etc.
Hot forging hydraulic press: large forging hydraulic press is able to complete a variety of free forgin equipment, which is one of the most widely used equipment in the forging industry . At present, there are 800T, 1600T, 2000T, 2500T, 3150T, 4000T, 5000T forging hydraulic press series specifications.
Four column hydraulic press: it is suitable for the pressing process of plastic materials. Such as powder products forming, plastic products forming, cold (hot) extrusion metal forming, sheet stretching and horizontal pressure, bending pressure, turning through, correction and other processes.
Four column hydraulic press can be divided into four column two beam hydraulic press, four column three beam hydraulic press, four column four beam hydraulic press.
Single arm hydraulic press (single column hydraulic press) : can expand the working range, take advantage of three space, lengthen the stroke of hydraulic cylinder (optional), the maximum telescopic 260mm-800mm, preset working pressure; Hydraulic system heat dissipation device.
Gantry type hydraulic press: assembly, disassembly, straightening, calendering, stretching, bending, punching and other work can be carried out on the machine parts, so as to truly realize the multi-purpose of one machine. The machine table can move up and down, the size of the expansion of the machine opening and closing height, more convenient to use.
Double column hydraulic press: this series of products are suitable for all kinds of parts of the press, bending shaping, stamping indentation, flanging, punching and small parts of the shallow stretching; Metal powder products forming and other processing technology. Adopt electric control, with point moving and semi-automatic circulation, can keep calendering time, and has a good slide guide, easy to operate, easy to maintain, economic and durable. According to the needs of users can be added thermal instrumentation, cylinder ejector, stroke digital display, counting and other functions.
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