Hot spinning bottom-finishing method of seamless gas cylinder by positive roller
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 th...
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Main Authors | , , , , |
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Format | Patent |
Language | Chinese English |
Published |
23.05.2012
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Subjects | |
Online Access | Get full text |
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Summary: | 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 |
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Bibliography: | Application Number: CN20101288790 |