Method and device for hydroforming of special-shaped tube without liquid filling
A technology for hydroforming and special-shaped pipes is applied in the field of hydroforming methods and devices for non-liquid-filled special-shaped pipes, which can solve the problems of pushing up product prices, reducing enterprise profits, increasing production costs, etc., and achieving simplified structure and simplified hydroforming devices. Effect
Active Publication Date: 2019-10-29
WEIFANG BELEAD AUTOMOBILE PARTS
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Problems solved by technology
This kind of equipment is suitable for the production of parts such as structural parts and T-shaped pipes with high precision requirements; but for special-shaped pipes with low precision requirements, due to the complex structure of the existing hydroforming equipment, unnecessary production costs are increased, pushing up Product prices, reducing corporate profits
[0005]
In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve
Method used
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0039] see figure 2 The present invention provides a non-fluid-filled special-shaped pipe hydroforming device, which includes a forming mold 1, a clamping press 2 and a hydraulic system 4 connected in sequence; the clamping press 2 and hydraulic system 4 are respectively connected to a computer control system 3; the forming mold 1 is also connected to the water injection device 10; the forming mold 1 includes an upper mold 11 and a lower mold, and a cavity formed after the upper mold 11 and the lower mold are closed;
[0040] The hydraulic system 4 includes an oil cylinder 41, a left seal push he...
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The invention relates to the technical field of special pipe hydraulic forming and provides a liquid-free special pipe hydraulic forming device. The liquid-free special pipe hydraulic forming device comprises a forming mold, a mold closing press machine and a hydraulic system which are connected in sequence. The mold closing press machine and the hydraulic system are connected with a computer control system correspondingly. The forming mold is further connected with a water injection device. A top mold body and a bottom mold body of the mold are closed to form a molding cavity. The two sides of the molding cavity are sealed through sealing push heads. The invention provides a liquid-free special pipe hydraulic forming method correspondingly. In this way, an oil cylinder penetrating throughthe top mold body and communicating with the molding cavity is arranged on the forming mold; water is injected into a sealed blank pipe through the water injection device in advance; and then the oilcylinder conducts compression to enable the blank pipe to undergo local plastic deformation and generate internal pressure to complete the bulging process. An internal pressure generation hydraulic system and a high-pressure source in the prior art are replaced. The structures of the sealing push heads and the whole hydraulic forming device are simplified. The manufacturing cost of the special pipe is reduced, and the wall thickness of the produced special pipe is more uniform.
Description
technical field [0001] The invention relates to the technical field of special-shaped pipe hydroforming, in particular to a non-liquid-filled special-shaped pipe hydroforming method and device. Background technique [0002] With the development of society and the continuous progress of human civilization, people put forward higher and higher requirements for modern manufacturing, and began to pay attention to energy saving and environmental protection. In the field of automobiles, with the rise of energy and raw material costs and the increase of laws and regulations on vehicle exhaust emissions, the lightweight of automobile structures is becoming increasingly important. The hydroforming process of pipe fittings adapts to the development requirements of lightweight structures in the automotive field due to the advantages of reduced material consumption, light weight of parts, high strength and flexible structural design, and has become a hot research topic in the field of m...
Claims
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IPC IPC(8): B21D26/033B21D26/047B21D26/045
CPCB21D26/033B21D26/045B21D26/047
Inventor 高林玉易斌何海林王凯胡家磊
Owner WEIFANG BELEAD AUTOMOBILE PARTS