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Corrugation 68mm x 13mm

Corrugation 76mm x 25mm

Corrugation 150mm x 50mm

Corrugation 300mm x 110mm

Corrugation 380mm x 140mm

Corrugation 200mm x 55mm

Corrugation 400mm x 150mm

Corrugation 75mm x 25mm

Corrugation 125mm x 25mm

Corrugation 68mm x 13mm

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Common manufacturing method for metal corrugated culvert pipe

Hydraulic molding is the most commonly used manufacturing method of metal bellows at present. Metal corrugated culvert pipe manufacturer generally take multi - wave one - time forming process.

(1) hydraulic molding process

Metal bellows hydraulic molding is divided into two stages. In the first stage, the pipe is restrained to expand under the action of liquid pressure in the pipe, and the degree of expansion is small, so that each forming intermediate template is positioned.

In the second stage, when the liquid pressure in the pipe is stable and equal to the bulging pressure, axial force is applied. Under the action of axial force and internal pressure, the pipe compresses and expands axially to make a metal bellows.

Metal corrugated culvert pipe

Axial compression bulging is adopted to improve the state of stress and strain in the bulging region, which is beneficial to plastic deformation and swelling coefficient.

(2) pressure control

The bulging pressure in the second stage of forming must be stable, and the pressure value is equal to the pressure value when constraining the bulging. If the bulging pressure is large, the blank will break. If the bulging pressure is too small, a concave wave is formed.

The size and shape of the hydroformed corrugated metal pipe can be formed into various waveforms according to the forming die. Compared with other bulging methods, the advantages of hydroforming are easy to get higher pressure, and the pressure action is uniform, control is relatively easy, the workpiece surface smooth, good quality; The disadvantage is that the forming device needs to be tightly sealed to prevent the bulging pressure and liquid leakage when the bulging.


Hengshui Yitong Pipe Industry Co.,Ltd.
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