Comparison of Horizontal Hydraulic Press and Stamping Welding Process

Compared with the traditional stamping process, the advantages of the horizontal hydraulic press forming technology are: the hydroforming process has obvious technical and economic advantages in terms of reducing weight, reducing the number of parts and molds, improving rigidity and strength, and reducing production costs. Therefore, it has been used more and more in the industrial field, especially in the automotive industry. In the automotive industry, aviation, aerospace and other fields, reducing structural mass to save energy during operation is a long-term goal of people, and it is also one of the trends in the development of advanced manufacturing technology. So, what are the technical advantages of ezhong horizontal hydraulic press?

1. Technical advantages of horizontal hydraulic press

Horizontal hydraulic press forming is an advanced manufacturing technology to achieve lightweight structure. Hydroforming is also known as "internal high pressure forming". Its basic principle is to use the pipe as a blank, apply ultra-high pressure liquid inside the pipe, and apply axial thrust to both ends of the pipe blank to replenish the material. Under the combined action of the two external forces, the tube blank material undergoes plastic deformation, and finally fits with the inner wall of the mold cavity to obtain a hollow part whose shape and precision meet the technical requirements. For hollow variable-section structural parts, the traditional manufacturing process is to stamp and form two half-pieces first, and then weld them into a whole, while the use of horizontal press machine hydroforming can integrally form hollow structural parts with varying cross-sections.

2. Comparison between the horizontal hydraulic press and stamping welding process

Compared with stamping and welding processes, hydroforming techniques and processes have the following main advantages: reduced mass and material savings. For typical parts such as automobile engine brackets and radiator brackets, the use of horizontal hydraulic press hydroforming parts is 20% to 40% lighter than stamping parts; for hollow stepped shaft parts, the weight can be reduced by 40% to 50%. Reduce the number of parts and molds and reduce mold costs. Hydroformed parts usually only need one set of molds, while stamping parts mostly require multiple sets of molds.

The number of engine bracket parts hydroformed compression machine uses was reduced from 6 to 1, and the number of radiator bracket parts was reduced from 17 to 10. Reduces the amount of welding required for subsequent machining and assembly. Taking the radiator bracket as an example, the heat dissipation area is increased by 43%, the number of solder joints is reduced from 174 to 20, the number of processes is reduced from 13 to 6, and the productivity is increased by 66%. Improve strength and stiffness, especially fatigue strength. For example, hydroformed radiator brackets can increase the stiffness by 39% in the vertical direction and 50% in the horizontal direction, reducing production costs. According to statistical analysis of applied hydroformed parts, the production cost of hydroformed parts is on average 15% to 20% lower than that of stamping parts, and the mold cost is reduced by 20% to 30%.

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