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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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01-08-2012 дата публикации

Die ring used for production of seamless steel pipe with large diameter and thick wall and manufacturing method thereof

Номер: CN102615131A
Автор: Chen Guosui, Su Tao, Cheng Shiqing, Fan Daosong, Wu Hongwei, Liao Gang
Принадлежит:

The invention relates to a die ring used for production of a seamless steel pipe with a large diameter and a thick wall and a manufacturing method thereof. The die ring is composed of a combination of a die ring sleeve and an inlaid sub-die ring. The manufacturing method of the die ring adopts an inlaid combination manufacturing method of: respectively processing and conducting heat treatment to the die ring sleeve and inlaid sub-die ring manufactured from forged steel, then combining them together by a screw connection way. In the invention, the die ring manufactured by combination of the die ring sleeve made from 45 steel and the inlaid sub-die ring made from 5CrMnMo tool steel with high strength and good red hardness has substantially improved service life compared with traditional 45 steel die rings, and also enhances the pipe blank surface quality of the seamless steel pipe with a large diameter and a thick wall. Also, when reaching the service life, the inlaid sub-die ring can be ...

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Номер записи: 1
09-01-2013 дата публикации

Forging technology for pipe fitting with flanges at two ends

Номер: CN102861858A
Автор: He Youbin, Huang Yongqiang, Chen Guosui, Su Tao, Cheng Shiqing, Tan Dawei, Liu Chang'an, Zhang Chengfeng, Xiong Wu, Huang Wen, Fan Daosong, Deng Zhiyong, Wu Hongwei, Liao Gang, Shang Long, Luo Zuyi, Lin Chen
Принадлежит:

The invention relates to a forging technology for a pipe fitting with flanges at two ends. The forging technology comprises the following steps: manufacturing a pipe blank; forging the pipe blank on a horizontal hydraulic press through a core bar and a model ring in a jacking and extending way; reserving a section of pipe blank for forming one end flange, and initially forging the pipe blank with one end flange; carrying out flame cutting to remove bottom end of the pipe blank and abandoned material at the flange end; locally heating the other end of the pipe blank on a vertical hydraulic press with a local device; and pressing and upsetting another end flange of the pipe blank on the vertical hydraulic press with a flange upsetting device. The pipe fitting manufactured by the invention has little follow-up working allowance for the appearance, so that materials are saved, the manufacturing period is shortened and the manufacturing cost is reduced. At the same time, with the adoption of ...

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Номер записи: 2
30-01-2013 дата публикации

Process for forging and molding special-shaped steel tube with a boss on excircle

Номер: CN102896171A
Автор: He Youbin, Huang Yongqiang, Chen Guosui, Su Tao, Cheng Shiqing, Tan Dawei, Liu Chang'an, Zhang Chengfeng, Xiong Wu, Huang Wen, Fan Daosong, Deng Zhiyong, Wu Hongwei, Liao Gang, Shang Long, Luo Zuyi, Lin Chen
Принадлежит:

The invention relates to a process for forging and molding a special-shaped steel tube with a boss on the excircle. The process comprises the following steps: preparing a tube blank is prepared; and on a horizontal hydraulic press, inserting a mandrel in the heated tube blank so as to mold the inner hole of the special-shaped steel tube with the boss on the excircle, and sequentially pressing against the tube blank by a plurality of special-shaped die rings so as to form the boss on the excircle of the steel tube, wherein each die ring is composed of an embedded sub-die ring and a die ring sleeve which are combined, and the inner wall of the embedded sub-die ring is provided with a groove corresponding to the boss of the tube blank. According to the invention, through adopting a die forging and open die forging combined flange forging molding mode, the overall continuity of the metal fiber of the special-shaped steel tube is ensured, and the overall strength requirement of the special-shaped ...

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Номер записи: 3