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Hydraulic Oil Press Work Sensitive, Reliable, Long Life
Jul 05, 2017

A Hydraulic Oil Press is a machine that uses liquid as a working medium and is based on the Pascal principle for delivering energy to achieve a variety of processes. Hydraulic Oil Press generally consists of the machine (host), power system and hydraulic control system composed of three parts.


Hydraulic machine (also known as: hydraulic machine) using Pascal's law made by the use of liquid pressure transmission machinery, many types. Of course, the use is also varied depending on the needs. Such as the type of liquid through the pressure to sub-points, there are two types of Hydraulic Oil Press and Hydraulic Oil Press. The total pressure produced by the Hydraulic Oil Press is large, commonly used for forging and stamping. Forging Hydraulic Oil Press is divided into two kinds of forging Hydraulic Oil Press and free forging press. Mold forging Hydraulic Oil Press to use mold, and free forging press without mold. China's first production of 10,000 tons of Hydraulic Oil Press is free forging Hydraulic Oil Press.


A Hydraulic Oil Press is a machine that uses liquid as a working medium to transfer energy to achieve a variety of processes. Hydraulic Oil Press in addition to forging forming, but also can be used for correction, press fit, packing, briquetting and pressing plate. Hydraulic Oil Presses include Hydraulic Oil Presses and Hydraulic Oil Presses. Water-based liquid as the working medium known as the Hydraulic Oil Press, oil as the working medium known as the Hydraulic Oil Press. The specifications of the Hydraulic Oil Press are generally expressed in terms of nominal working force (kiln) or nominal tonnage (tonnes). Forging Hydraulic Oil Presses are mostly Hydraulic Oil Press, tonnage higher. In order to reduce the size of the equipment, large forging Hydraulic Oil Press commonly used high pressure (35 MPa or so), and sometimes more than 100 MPa super high pressure. Other uses of the Hydraulic Oil Press generally use 6 ~ 25 MPa working pressure. The tonnage of the Hydraulic Oil Press is lower than that of the Hydraulic Oil Press.

How Hydraulic Oil Press works. Large and small plunger area were S2, S1, plunger on the force were F2, F1. According to the Pascal principle, the liquid pressure is equal everywhere, ie F2 / S2 = F1 / S1 = p; F2 = F1 (S2 / S1). Said the hydraulic gain effect, as with the mechanical gain, the force increases, but the power does not gain, so the movement of the big plunger is a small plunger movement distance S1 / S 2 times.

Working medium

The role of the working medium used in the Hydraulic Oil Press is not only the delivery of pressure, but also to ensure that the working parts of the machine work sensitive, reliable, long life and less leakage. The basic requirements of the Hydraulic Oil Press on the working medium are: ① have the appropriate mobility and low compressibility, in order to improve the efficiency of transmission; ② anti-corrosion; ③ good lubrication performance; ④ easy to seal; ⑤ stable performance, long-term work Without deterioration. The Hydraulic Oil Press was originally used as a working medium, and later used in the water by adding a small amount of emulsified oil from the emulsion to increase the lubrication and reduce corrosion. In the late 19th century there was a hydraulic machine with mineral oil as the working medium. The oil has good lubricity, corrosion resistance and moderate viscosity, which is beneficial to improve the performance of Hydraulic Oil Press. The second half of the 20th century, the emergence of a new type of water-based emulsion, the emulsified form is "water-in-water", rather than the original "oil". "Water-in-oil" emulsion of the external phase of the oil, its lubrication and corrosion resistance close to the oil, and little oil content, not easy to burn. But the water-based emulsion is more expensive, limiting its promotion.

Compared with the traditional stamping process, the hydroforming process has obvious technical and economic advantages in reducing the weight, reducing the number of parts and the number of molds, improving the rigidity and strength, and reducing the production cost. In the industrial field, especially in the automobile industry, More and more applications.

In the automotive industry and aviation, aerospace and other fields, to reduce the quality of the structure to save the energy in operation is the long-term pursuit of the goal, but also one of the advanced manufacturing technology trends. Hydroforming (hydroforming) is to achieve the structure of a lightweight manufacturing advanced technology.

Hydroforming is also known as "internal high pressure forming", and its basic principle is to use the pipe as a blank, in the pipe inside the application of ultra-high pressure liquid at the same time, the tube at both ends of the axial thrust force, feeding. Under the combined action of two kinds of external forces, the tube material is plastic deformation, and finally with the mold cavity wall fit, get shape and accuracy are in line with technical requirements of hollow parts.