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PILLAR PIPE AND PILLAR PIPE EXPANDING APPARATUS AND PILLAR PIPE MANUFACTURING METHOD
PILLAR PIPE AND PILLAR PIPE EXPANDING APPARATUS AND PILLAR PIPE MANUFACTURING METHOD
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机译：支柱管及支柱管扩径装置及支柱管的制造方法
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摘要
The present invention relates to a pillar pipe, a pillar pipe expanding apparatus, and a pillar pipe manufacturing method using the same and, more specifically, relates to a pillar pipe, a pillar pipe expanding apparatus, and a pillar pipe manufacturing method using the same, wherein to form a pipe expanding unit larger than a diameter of a body unit in a conventional pillar pipe, a pipe body having a different diameter is not welded and bolted to be connected, and the pipe expanding unit is pressed and processed in one pipe body. Therefore, a joint such as a welding or bolting coupling portion is not formed between a body unit and the pipe expanding unit, and the body unit and the pipe expanding unit are integrally connected to reduce production costs of a pillar pipe and improve durability.
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