MANUFACTURING METHOD OF STRUCTURAL STEEL PIPE

Provided is a manufacturing method of a steel pipe, which performs heat treatment processes of a pipe as consecutive processes to improve productivity of a steel pipe manufacturing process, and prevents a negligence accident caused by cooling water introduced into and accumulated in a steel pipe by...

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Bibliographische Detailangaben
1. Verfasser:	JO, UI JIN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BROACHING CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FILING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PLANING PUNCHING METAL SAWING SCRAPING SHEARING SLOTTING SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	Provided is a manufacturing method of a steel pipe, which performs heat treatment processes of a pipe as consecutive processes to improve productivity of a steel pipe manufacturing process, and prevents a negligence accident caused by cooling water introduced into and accumulated in a steel pipe by a prior welding process and the like when performing a heat treatment process of the steel pipe before a cutting process of the steel pipe. The manufacturing method of a steel pipe comprises: a molding step of molding a steel plate base material in a prescribed shape; a welding step of welding both edges of the molded steel plate base material to form a steel pipe; a cooling step of cooling the steel pipe; a sizing step of machining the cooled steel pipe into a preset shape; and a cutting step of cutting the steel pipe into a prescribed length. 강관 제조 공정에서 용관의 열처리 공정을 연속공정으로 수행하여 생산성을 향상시킬 수 있으며, 강관의 절단 공정 전 강관의 열처리 공정을 수행함에 있어서, 앞선 용접 공정 등에 의해 강관 내부로 유입되어 고인 냉각수에 의한 안전 사고의 발생을 방지할 수 있는 강관의 제조방법을 제공한다. 상기 강관의 제조방법은 강판 모재를 소정의 형상으로 성형하는 성형 단계; 성형된 강판 모재의 양 모서리를 용접하여 강관을 형성하는 용접 단계; 상기 강관을 냉각하는 냉각 단계; 냉각된 상기 강관을 사전 설정된 형상으로 가공하는 사이징 단계; 상기 강관을 소정의 길이로 자르는 절단 단계를 포함하는 것을 특징으로 한다.