Hot spinning bottom-finishing method of seamless gas cylinder by positive roller

A technology of hot spinning and gas cylinders, which is applied to other household appliances, household appliances, applications, etc., can solve the problems of low extrusion force and high price in the fusion zone, and achieve the effect of reducing equipment cost and low price.

Inactive Publication Date: 2011-04-06
国营江北机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this forming method is that the extrusion force in the fusion zone at the center of the bottom is relatively small, and the equipment needs a fast-response perforation gun to quickly perforate the center of the bottom twice to increase the fusion temperature of the material and ensure good fusion
At present, most of the above-mentioned reverse wheel spinning methods need the support of imported equipment with fast response perforation guns. Generally, German Leifeld CNC rotary wheel hot spinning machines are used, but the equipment is expensive, generally at 15 million yuan above

Method used

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  • Hot spinning bottom-finishing method of seamless gas cylinder by positive roller
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  • Hot spinning bottom-finishing method of seamless gas cylinder by positive roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The structural parameters of the rotary wheel 4 used are: the rotary wheel width B=60mm, the angle β between the working slope and the rotary wheel axis line=16°, the fillet radius R at the lower end of the working slope 1 =9mm, the fillet radius R of the high end of the working slope 2 = 6 mm.

[0038] For Φ356mm×7.7mm, 80-liter ISO9809-1 compressed natural gas cylinders for automobiles, the GL425 CNC rotary wheel hot spinning machine produced by Sichuan Deyang Tellhow Technology Co., Ltd. is used. The process of spinning and closing the bottom is as follows:

[0039] 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 bottom section of the steel pipe 3 is L=420mm. The relationship between the diameter Φ of the steel pipe 3 and the heating length L is as follows image 3 shown.

[0040]2) Sealing and spinning: Turn on the automatic heat supplement gun to suppl...

Embodiment 2

[0047] The structural parameters of the rotary wheel 4 used are: the rotary wheel width B=70mm, the angle β between the working slope and the rotary wheel axis line=25°, the fillet radius R at the lower end of the working slope 1 =20mm, the fillet radius R of the high end of the working slope 2 = 12 mm.

[0048] For the Φ406mm×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 process of spinning and closing the bottom is as follows:

[0049] 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 bottom section of the steel pipe 3 is L=480mm. The relationship between the diameter Φ of the steel pipe 3 and the heating length L is as follows image 3 shown.

[0050] 2) Sealing and spinning: Turn on the automatic heat supplement gun to supplement the heat of t...

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Abstract

The invention discloses a hot spinning bottom-finishing method of a seamless gas cylinder by a positive roller, comprising the following steps of: 1), heating the bottom-finishing section of a steel pipe to 1050 to 1100 DEG C; 2), performing standard semispherical positive sealing and spinning to the bottom-finishing section of the steel pipe for 7 to 8 times, obtaining a semispherical gland; 3), performing the semispherical gland forming and the bottom thickening and spinning to the semispherical gland for 7 to 10 times, obtaining a semispherical gland with a thickened bottom; 4), finally smoothening and spinning the gland surface, and finishing the hot spinning bottom-finishing of the seamless air cylinder. The method finishes the bottom and forms the seamless air cylinder by the positive roller hot spinning, thereby reducing the self-pressure welding material temperature of the steel pipe material in the central melt area of the air cylinder bottom, improving the centre thickening effect of the gland bottom and distinctly reducing the device cost.

Description

technical field [0001] The invention relates to a hot-spinning forming process of a seamless gas cylinder, in particular to a method for closing the bottom of a seamless gas cylinder by hot-spinning a forward-rotating wheel. 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 bottom end), and the head The head and the mouth of the bottle (called the mouth). [0003] For high-pressure seamless gas cylinders that are bottomed by hot spinning of seamless steel pipes, the thickness from the cylindrical section of the cylinder to the center of the bottom of the head is required to gradually increase, and the thickness of the center of the bottom should not be less than 1.5 times the minimum design wall thickness of the cylindrical section. After anatomical acid etching of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D51/38B21D22/14
Inventor 韩庆波曾庆祝余天雄高建国李明剑
Owner 国营江北机械厂
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