发明名称 |
Up-set shrinker for producing thick wall steel pipe |
摘要 |
For producing steel pipe from thick steel plate, an up-set shrinker is employed for reducing and processing an O-shaped pipe-blank in a facility for producing thick wall steel pipe. The up-set shrinker is provided with a plurality of reducing shrinker dies located around the pipe-blank in correspondence to parts other than abutting parts of the edges of the pipe-blank, and with at least one edge processing shrinker die located in correspondence to the butting parts of the edges of the pipe-blank. The edge processing shrinker die is formed at its die surface with a projecting portion over the length of the die. The edge processing shrinker die is actuated independently of the reducing shrinker dies.
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申请公布号 |
US4373365(A) |
申请公布日期 |
1983.02.15 |
申请号 |
US19800151470 |
申请日期 |
1980.05.19 |
申请人 |
NIPPON KOKAN KABUSHIKI KAISHA |
发明人 |
TAIRA, TADAAKI;ISHIHARA, TOSHIO;TAKEHARA, JUNICHIRO |
分类号 |
B21D5/01;B21C37/08;(IPC1-7):B21D5/10 |
主分类号 |
B21D5/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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