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      Suzhou Shengminglong Hydraulic Equipment Co.,Ltd

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      Address: no.11-5, Luyang Fuyang Road, Zhoushi Town, Kunshan City, Jiangsu Province


      Suzhou Shengming dragon hydroforming technology

      2019-05-22

      Hydroforming technology of shengminglong servo lower cylinder four column hydraulic press

      I. Superiority

      Compared with the traditional stamping process, the hydroforming process has obvious technical and economic advantages in reducing weight, reducing the number of parts and dies, improving stiffness and strength, reducing production costs and so on. It has more and more applications in the industrial field, especially in the automobile industry.

      In the automotive industry and other fields, reducing the structure quality to save the ability in operation is the long-term goal of people, and also the development trend of advanced manufacturing technology. Hydroforming is an advanced manufacturing technology to realize lightweight structure.

      Hydroforming is also known as "internal high pressure forming". Its basic principle is to use the tube as the blank, apply high-pressure liquid inside the tube, at the same time, apply axial thrust to both ends of the tube blank to supplement. Under the joint action of two kinds of external forces, the tube blank material has plastic deformation and fits the inner wall of the mold cavity. There are hollow parts whose shape and accuracy meet the technical requirements.

      Ⅱ.Advantages

      For hollow variable cross-section structural parts, the traditional manufacturing process is to punch two half pieces first, and then weld them as a whole, while the hydroforming can form the hollow structural parts with changes along the cross-section of the component as a whole. Compared with stamping welding process, hydroforming technology and process has the following main advantages:

      1. Reduce mass and save materials. For typical parts such as automobile engine bracket and radiator bracket, the weight of hydroforming parts can be reduced by 20-40% compared with 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 the cost of molds. Generally, only one set of die is needed for hydroforming parts, while many sets of dies are needed for stamping parts. The number of hydroforming 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 rigidity, especially the fatigue strength. For example, the rigidity of the radiator bracket formed by hydraulic pressure can be increased by 39% in the vertical direction and 50% in the horizontal direction.

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



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