Hot drawing technology of 430 material steel cylinder

A hot-drawing and steel cylinder technology, applied in the field of gas cylinder processing, can solve problems such as hidden dangers of safety, gas leakage of gas cylinders, excessive wall thickness difference of containers and bottles, etc., so as to achieve the effect of improving rolling precision and avoiding shortening of service life.

Inactive Publication Date: 2015-11-25
SINOMA SCI & TECH CHENGDU CO LTD
6 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Poor manufacturing process will cause the wall thickness difference of the container bottle to be too large, and the quality difference of the whole gas cylinder is very large. Similarly, if the t...
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Method used

The present invention has effectively improved rolling precision by repeatedly deep-drawing treatment, makes the steel cylinder wall thickness accuracy error of forming after deep-drawing be no more than 2%, and adopts 430 stainless iron, c...
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Abstract

The invention discloses a hot drawing technology of a 430 material steel cylinder. The hot drawing technology comprises the steps of material selecting, mold fixing, annealing, grinding, drawing, closing, cleaning and the like. The first-time hot drawing is carried out on a ground blank, the annealing step is carried out after the first-time hot drawing, and then the second-time hot drawing is carried out. The third-time hot drawing shaping is carried out on the blank on which the second-time hot drawing is carried out, and pressure maintaining processing is carried out when the third-time hot drawing shaping is carried out. The overall quality of the steel cylinder is guaranteed through multi-time drawing and annealing.

Technology Topic

Examples

  • Experimental program(1)

Example Embodiment

[0017] The present invention will be further illustrated by specific embodiments below.
[0018] A 430 material steel cylinder hot drawing process is characterized in that it comprises the following steps:
[0019] Material selection: choose 430 stainless iron plate as the blank, calculate the size according to the size of the cylinder, and then use the cutting machine to cut the blank into circular plates according to the calculated target size;
[0020] Fixed mold: Select the hot drawing mold according to the cut circular plate. The mold has at least three mold positions with successively deepened depths. Fix the mold on the clamping machine and clean the mold;
[0021] Annealing: Put the cut round plate in an annealing furnace for annealing treatment. The annealing furnace is kept at a temperature of 1095°C for 15 minutes, and then rapidly cooled;
[0022] Polishing: Polish the surface to clean the burrs;
[0023] Deep drawing: place the polished blank at the mold position with the lowest mold depth, turn on the clamping machine, heat up to 550°C~650°C, perform the first hot drawing, and then perform the above solution after the first hot drawing The processing step is to place the blank in the mold for the second hot drawing, and the blank after the second hot drawing is subjected to the third hot drawing calibration, and the pressure holding treatment is performed during the third hot drawing calibration; In the drawing step, from the first drawing to the final drawing, the remaining height is 20 to 30 mm, and from the second drawing to the final drawing, the height is 5 to 8 mm. In the drawing step, the drawing speed is maintained at 80-110 mm/min.
[0024] Closing: Extrude the semi-finished product of the gas cylinder after drawing at a temperature of 760 to 815 ℃ through a mold to squeeze out the bottle mouth;
[0025] Cleaning: Pour the acid solution into the inner cavity of the metal bottle, keep it for 15 minutes after filling, and finally discharge the acid solution.
[0026] The invention effectively improves the rolling precision through multiple deep drawing treatments, so that the wall thickness accuracy error of the steel cylinder formed after deep drawing is not more than 2%, and the 430 stainless iron is used, which can effectively resist corrosion and oxidation and avoid the steel cylinder in a specific environment In the problem of shortened service life, acid solution is used for cleaning to remove the iron filings on the surface and make it more beautiful.
[0027] The above are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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Description & Claims & Application Information

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