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Forward roller hot spinning closing method of seamless gas cylinder

A hot spinning and spinning wheel technology, which is applied to other household appliances, household appliances, applications, etc., can solve the problems of poor thickening effect at the center of the bottom of the head and instability under pressure, so as to achieve good thickening effect and avoid damage Effect of pressure destabilization waste

Inactive Publication Date: 2012-11-07
国营江北机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this forming method: the thickening effect of the center of the bottom of the head is poor; the head is in an axially compressed state during forming, which is likely to cause pressure instability and waste products

Method used

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  • Forward roller hot spinning closing method of seamless gas cylinder
  • Forward roller hot spinning closing method of seamless gas cylinder
  • Forward roller hot spinning closing method of seamless gas cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The structural parameters of the used rotary wheel 4 are: rotary wheel width B=65mm, the angle β=78° between the working slope and the rotary wheel axis line, the vertical projection width S=19.3mm of the working slope relative to the rotary wheel axis line, and the working slope Corner radius R on one side 2 =8mm, the fillet radius R of the non-working bevel 1 = 10 mm.

[0039] For Φ356×7.7mm, 80-liter ISO9809-1 compressed natural gas cylinders for automobiles, the GL425 CNC rotary hot spinning machine produced by Sichuan Deyang Tellhow Technology Co., Ltd. is used. The spinning and closing process is as follows:

[0040] 1) Steel pipe heating: the steel pipe 3 is automatically fed into an intermediate frequency heating furnace and heated to 1080° C., and the heating length L of the closed section of the steel pipe is 420 mm. The relationship between the diameter Φ of the steel pipe 3 and the heating length L is as follows image 3 shown.

[0041]2) Sealing and spi...

Embodiment 2

[0049] The structural parameters of the used rotary wheel 4 are: rotary wheel width B=65mm, the angle β=81° between the working slope and the rotary wheel axis line, the vertical projection width S=19.3mm of the working slope relative to the rotary wheel axis line, and the working slope One side fillet radius R 2 =12mm, the fillet radius R on the side of the non-working slope 1 = 16 mm.

[0050] For the Φ406×6.6mm, 100-liter GB24160 ring-wound gas cylinder liner, the GL425 CNC rotary hot spinning machine produced by Sichuan Deyang Tellhow Technology Co., Ltd. is used. The spinning and closing process is as follows:

[0051] 1) Steel pipe heating: the steel pipe 3 is automatically fed into an intermediate frequency heating furnace and heated to 1080° C., and the heating length of the closing section of the steel pipe 3 is L=480 mm. The relationship between the diameter Φ of the steel pipe 3 and the heating length L is as follows image 3 shown.

[0052] 2) Sealing and spinn...

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Abstract

The invention discloses a seamless gas cylinder closing method by forward roller hot spinning. The method comprises the following steps of: 1) heating a closing section of a steel pipe to the temperature of between 1,050 and 1,100 DEG C; 2) performing 6 to 7 passes of semi-ellipsoidal forward sealing spinning on the closing section of the steel pipe to obtain a semi-ellipsoidal seal head; 3) performing 3 to 4 passes of bottom thickening spinning on the semi-ellipsoidal seal head; 4) molding and spinning a cylinder mouth; and 5) performing finishing spinning on the surface of the seal head to finish the hot spinning closing for a seamless gas cylinder. The seamless gas cylinder is closed and molded by a forward roller hot spinning closing method, the bottom of the seal head has excellent central thickening effect, enough materials for mouth molding are ensured, wastes caused by incompression and instability can be avoided, and the quality rate of spinning closing can be improved.

Description

technical field [0001] The invention relates to a seamless gas cylinder hot-spinning forming process, in particular to a seamless gas cylinder forward-rotating wheel hot-spinning closing method. Background technique [0002] Compressed natural gas cylinders (or wound cylinder liners) for automobiles are generally formed by hot-rolled (or cold-drawn) seamless steel tubes by hot-spinning into a semi-ellipsoidal (or hemispherical) bottom head (called the closure), and a head The head and the mouth of the bottle (called the closure). [0003] High-pressure seamless gas cylinders closed by hot spinning of seamless steel pipes require that the thickness gradually increase from the cylindrical section of the cylinder to the root of the bottle mouth of the head. The length shall not be less than 30mm. After the bottle mouth has been machined, there must be no defects such as unfused, cracks or lack of material visible to the naked eye on the surface of the inner hole thread on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D51/38
Inventor 韩庆波曾庆祝余天雄高建国李明剑
Owner 国营江北机械厂