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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Bibliographic Details
Main Authors HAN QINGBO, ZENG QINGZHU, YU TIANXIONG, GAO JIANGUO, LI MINGJIAN
Format Patent
LanguageChinese
English
Published 23.05.2012
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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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
Bibliography:Application Number: CN20101288790