Necking process used for aluminum alloy liner of hydrogen storage cylinder

A technology of aluminum alloy and aluminum alloy tubes, which is applied in the field of closing technology, can solve problems such as property loss, casualties, gas cylinder leakage, etc., and achieve the effects of high first pass rate, good fatigue performance and wide application range

Inactive Publication Date: 2012-01-11
上海康巴赛特科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the rough surface of the bottle neck area of ​​the gas cylinder, some small scratches and surface oxides, it is difficult to detect the tiny cracks in the early stage of the bottle neck area
Under the action of the working pressure stress and the residual stress formed by the heat treatment of the gas cylinder, the tiny cracks continue to expand, which leads to the leakage of the gas cylinder, and more seriously, sometimes causes the explosion of the gas cylinder, causing heavy property losses and casualties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A process for spinning and closing, which includes the setting of the following parameters of the CNC closing machine: preheating temperature, the feed amount of the CNC closing machine, the angle of the roller of the CNC closing machine, the temperature supplement during the closing process, aluminum alloy Tube thickness. The specific process includes the following steps:

[0024] (1) Measure the wall thickness of the aluminum alloy tube with a thickness gauge, so that the wall thickness of the aluminum alloy tube is 4mm;

[0025] (2) Adjust the angle of the rollers of the closing machine generally at 15°C;

[0026] (3) Position the aluminum alloy tube according to the requirements, start the numerical control closing machine, the speed is 300 rpm, start the ignition device, and heat the bottle liver to 350°C-380°C. Start after reaching temperature;

[0027] (4) During the start-up process, the feed rate is 10mm per step;

[0028] (5) When the mouth of the bottle i...

Embodiment 2

[0031] A closing process for the aluminum alloy liner of a hydrogen storage cylinder. The process is to close the hollow aluminum alloy tube on a numerical control closing machine, and optimize the closing process by adjusting the parameters of the numerical control closing machine. The process specifically includes the following steps:

[0032] (1) Measure the wall thickness of the aluminum alloy pipe with a thickness gauge, and the wall thickness of the aluminum alloy pipe is 3mm;

[0033] (2) Adjust the roller angle of the CNC mouth closing machine to 10°;

[0034] (3) Position the aluminum alloy tube, start the ignition device, heat the aluminum alloy inner gall of the hydrogen storage cylinder to 350°C, and start the numerical control closing machine to close it after reaching the temperature;

[0035] (4) During the start-up process, the feed rate of the CNC closing machine is 8mm per step;

[0036] (5) Carry out supplementary heating when the mouth of the bottle is clo...

Embodiment 3

[0038] A closing process for the aluminum alloy liner of a hydrogen storage cylinder. The process is to close the hollow aluminum alloy tube on a numerical control closing machine, and optimize the closing process by adjusting the parameters of the numerical control closing machine. The process specifically includes the following steps:

[0039] (1) Measure the wall thickness of the aluminum alloy pipe with a thickness gauge, and the wall thickness of the aluminum alloy pipe is 6mm;

[0040] (2) Adjust the angle of the rollers of the CNC mouth closing machine to 20°;

[0041] (3) Position the aluminum alloy tube, start the ignition device, heat the aluminum alloy inner gall of the hydrogen storage cylinder to 380°C, and start the numerical control closing machine to close it after reaching the temperature;

[0042] (4) During the start-up process, the feed rate of the CNC closing machine is 12mm per step;

[0043] (5) Supplementary heating is carried out when the mouth of the...

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Abstract

The invention relates to a necking process used for an aluminum alloy liner of a hydrogen storage cylinder. The process comprises a necking preheating temperature, the number of feeding tools of a numerical control necking machine, the angle of a roller of the numerical control necking machine, temperature compensation in a necking process, and the thickness of aluminum alloy tubes. Compared with the prior art, the necking process has the advantages that: product yield is high, the arc shape of cylinder body is good, the outer surface of the cylinder body is smooth and clean, and the concordance rate of the cylinder body is high.

Description

technical field [0001] The invention relates to a hydrogen storage cylinder, in particular to a sealing process for an aluminum alloy liner of the hydrogen storage cylinder. Background technique [0002] End spinning is a metal pressure processing method used to form thin-walled hollow rotary parts. A cylindrical hollow part is heated to the temperature at which the metal strength is the lowest and the plasticity is the best. The end slowly shrinks, and it is completed after multi-pass stretching and spinning. Aluminum alloy closing spinning is a pressure processing method for forming thin-walled hollow and rotating aluminum alloy tubes. The cylindrical hollow aluminum alloy is heated to the deformation point of 350°C. When the plasticity is optimal, the support arm is constantly swinging on the horizontal plane. Change the angle of the rollers to make the pipe end shrink slowly, and the finished product is finished by multi-channel stretching and spinning. During the use ...

Claims

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Application Information

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IPC IPC(8): B21D51/38
Inventor 王能飞
Owner 上海康巴赛特科技发展有限公司
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