¿Conoce la prensa hidráulica de forja?
(1) A class of traditional structure, the three beams and four columns on the moving type, most of the transmission form for the pump accumulator drive, manipulation form for the “receiver” type control “to mention the valve distributor”. Forging supporting equipment is mainly forging crane plus turning machine, there are some homemade forging operating machine (which is produced by the professional factory forging operating machine is very little). This type of hydraulic press structure is simple, high degree of localization of components, low failure rate, with the general fault since the troubleshooting function. forging hydraulic press
(2) The second category is “fast forging hydraulic press”, the two columns pull down type, the press by the oil pump direct drive, using “electro-hydraulic servo” control, can accurately control the size of the stroke, most equipped with operators (some also use double operators). The main machine can make the “upper anvil” rotate, and is equipped with lateral anvil shifting table, automatic anvil changing library, and some presses are equipped with rotatable material transport trolley. These hydraulic presses are imported and domestic, with high technical content, but the reliability of key components is not high, and it is difficult to troubleshoot. In addition, the start-up rate of this kind of equipment is not high.
Commonly used structure are single-arm type, double-column type, four-column type, up-motion type, down-motion type, double rack cylinder-motion type, etc.
The advantages of the pull-down structure: low center of gravity, forging, the upper part of the small shaking, the machine oil tank drive system all in the pit, so that the fire can be effectively avoided, but the pit will increase the investment in plant settings. The whole frame is pulled down, which will greatly increase the mass of the moving part, and the energy consumption is large. Therefore, large tonnage hydraulic presses (5OMN and above) should not adopt the frame pull-down structure. Small and medium-sized hydraulic presses can develop a two-column pull-down structure. forging hydraulic press
The traditional three-beam and four-column structure is simpler and more convenient to manufacture, use and maintain.100 For many years, it has been the representative form of the main machine, but in the continuous development of industrial technology, it has been fully improved. For small and medium-sized presses, the inclined two-column type is also a very good structure.
The upward moving forging hydraulic press, compared with the downward pulling type, has a technical problem of fireproofing.
Regardless of the structure, it depends on the adaptability of the structure to the forging process, and a good structure is easy to operate. Of course, the manufacturing cost, durability and easy maintenance are also very important.
II, the transmission method
In the 19th century, only steam hydraulic presses, the use of gravity accumulators and steam booster. 20 century, the introduction of high-power pumps, high-pressure container production has become possible, the emergence of the pump accumulator drive. 20 century after the 70s, due to high-performance high-flow oil pump and its hydraulic components, PLC, touch screen, industrial control machine and a variety of advanced measurement and control components into the industrial field, forging hydraulic presses has made great progress. However, there is no fundamental change in the force components of hydraulic presses.
At present, the world’s newly manufactured hydraulic presses have few pump accumulator drive. Water pump accumulator drive is used to “lift valve” distributor, “hydraulic receiver” servo control, “with the valve” of the small handle control and The distributor control of “torque motor-following rotary valve” is far behind the modern “electro-hydraulic servo-controlled two-way cartridge valve control” and “sine drive”. “Pump direct control” of the hydraulic press. Now the PLC, touch screen, industrial control machine, electro-hydraulic servo and two-way cartridge valve system has been very mature, using these technologies can achieve accurate control of speed, pressure, movable beam stroke size, it is easy to achieve forging hydraulic press production automation.forging hydraulic press
For free forging, “fast forging” is mainly used for the “finishing” process, which does not take up many working hours, the process that takes up the most working hours is “drawing” and “upsetting”. “Therefore, to increase the working speed (empty stroke; working stroke; return stroke)
