| 摘要 |
PURPOSE: A manufacturing method of airway pipe is provided which reduces manufacturing cost by roll forming welding both ends of the steel sheet in a cylindrical shape after perforating a plurality of air guiding holes on a steel sheet, thereby lowering fabrication cost and improving workability. CONSTITUTION: The manufacturing method of airway pipe comprises first step of mounting a coiled steel sheet on a uncoiler; second step of transferring the steel sheet to a high speed perforating press as peeling off the surface of the steel sheet; third step of forming a plurality of air guiding holes on the steel sheet by operating the high speed perforating press; fourth step of coiling the air guiding hole formed steel sheet again if the third step is completed; fifth step of transferring the steel sheet to a circular roll forming machine in the state that the steel sheet coiled in the fourth step is again mounted on the uncoiler; sixth step of welding fixing both ends of the steel sheet to each other by operating the circular roll forming machine; eighth step of secondly cutting again the cylindrical steel sheet cut to 5.4 to 6.0 m to 2.7 to 3.0 m after seventh step of first cutting a cylindrical steel sheet discharged from the circular roll forming machine to 5.4 to 6.0 m; and ninth step of completing an airway pipe by pressing one end of the cylindrical steel sheet using a pressing press to prevent air from leaking through an one end of the cylindrical steel sheet cut in the eighth step.
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