Qiaolian machine is the brand for machinery of Siwarde group.We have been committed to the development and research of PC/ABS/PMMA sheet,silicone and rubber forming equipment more than 10 years.We have much experience in manufacturing compression molding machine,vacuum compression molding machine,rubber injection molding machine,LSR injection molding machine,extrusion machine,banbury mixer and mixnig mill machine,as well as related technologies.
The specifications of the hydraulic press are generally expressed in the nominal working force (kN) or the nominal tonnage (ton). Most of the hydraulic presses for forging are hydraulic presses, and the tonnage is high. In order to reduce the size of the equipment, large forging hydraulic presses often use higher pressures (about 35 MPa), and sometimes ultra-high pressure of more than 100 MPa is also used. Hydraulic presses for other uses generally use a working pressure of 6 to 25 MPa. Hydraulic presses have a lower tonnage than hydraulic presses.
The basic principle is that the oil pump delivers the hydraulic oil to the integrated cartridge valve block, and distributes the hydraulic oil to the upper or lower cavity of the cylinder through each check valve and relief valve, and the cylinder is moved under the action of high-pressure oil. A hydraulic press is a device that uses liquids to transfer pressure. Liquids follow Pascal's law when they transfer pressure in a closed vessel.
Hydraulic presses include hydraulic presses and hydraulic presses. The water-based liquid as the working medium is called the hydraulic press, and the oil as the working medium is called the hydraulic press.
The basic requirements of hydraulic presses for working medium are:
(1) Have suitable fluidity and low compressibility to improve the efficiency of the transmission;
(2) Can prevent rust;
(3) Good lubrication performance;
(4) Easy to seal;
(5) Stable performance, long-term work and no deterioration.
Double-column hydraulic presses are not only diverse, but also versatile. According to the type of liquid that transmits pressure, the two-column hydraulic press can be divided into hydraulic press and hydraulic press. The total pressure generated by the water is large and is often used for forging and stamping.
Hydraulic presses are mainly used in industrial production for heavy-duty external processing, such as stamping, forging, stretching, die casting and so on.