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For hollow variable section structural parts, the traditional manufacturing process is to punch two halves first, and then weld them into a whole, while hydroforming can integrally form hollow structural parts that vary along the section of the component at one time. Compared with stamping and welding process, hydroforming technology and process have the following main advantages:

1. Reduce quality and save materials. For typical parts such as automobile engine bracket and radiator bracket, hydroforming parts are 20%~40% less than stamping parts; For hollow stepped shaft parts, the weight can be reduced by 40%~50%.

2. Reduce the number of parts and molds, and reduce mold costs. Hydroforming parts usually only need one set of die, while stamping parts mostly need multiple sets of dies. The number of hydroformed engine bracket parts is reduced from 6 to 1, and the number of radiator bracket parts is reduced from 17 to 10.

3. It can reduce the welding amount of subsequent machining and assembly. Take the radiator bracket as an example, the heat dissipation area increased by 43%, the number of solder joints decreased from 174 to 20, the number of processes decreased from 13 to 6, and the productivity increased by 66%.

4. Improve the strength and stiffness, especially the fatigue strength. For example, the stiffness of the hydroformed radiator support can be increased by 39% in the vertical direction and 50% in the horizontal direction.

5. Reduce production costs. According to the statistical analysis of applied hydroforming parts, the production cost of hydroforming parts is 15%~20% lower than that of stamping parts, and the die cost is 20%~30% lower.

The hydraulic transmission system of four column hydraulic press consists of power mechanism, control mechanism, actuator, auxiliary mechanism and working medium. The power mechanism usually adopts the oil pump as the power mechanism, which is generally the integral oil pump. In order to meet the requirements of the motion speed of the actuator, one or more oil pumps are selected. Gear pump for low pressure (oil pressure less than 2.5 MP); Vane pump for medium pressure (oil pressure less than 6.3MP); Plunger pump for high pressure (oil pressure less than 32.0MP). The pressure processing and forming of various plastic materials, such as the extrusion, bending, stretching of stainless steel plates and steel plates, and the cold pressing of metal parts, can also be used for the pressing of powder products, grinding wheels, bakelite, and resin thermosetting products.

Hydraulic press is mainly used in the following fields:

1. The stamping and drawing forming process of sheet metal parts is mainly used for the forming of metal covering parts in the automobile and household appliance industries;

2. Pressure forming of metal mechanical parts, mainly including die forming, extrusion forming of metal profiles, cold and hot die forging, free forging and other processing processes;

3. Powder products industry, such as magnetic materials, powder metallurgy, etc;

4. Pressing and forming of non-metallic materials, such as SMC forming, hot pressing of automotive interior parts, rubber products, etc;

5. Hot pressing of wood products, such as hot pressing of plant fiber boards and profiles;

6. Other applications: such as press fitting, correction, plastic sealing, embossing and other processes

Wuxi Kelite Precision Hydraulic Machinery Factory has implemented ISO9001:2008 international quality system and CE quality certification earlier in the industry, and registered its trademark in 2011. It is a professional manufacturer of CNC servo hydraulic machine tools. The main products are 10 tons to 2000 tons of 8 series and more than 100 varieties of single column, four column and frame CNC servo hydraulic presses. At the same time, depending on the internal technical force, the company supplies various kinds of automatic stamping production lines to foreign customers